diff --git a/Documentation/devicetree/bindings/clock/zynq-7000.txt b/Documentation/devicetree/bindings/clock/zynq-7000.txt index 23ae1db1bc13..d99af878f5d7 100644 --- a/Documentation/devicetree/bindings/clock/zynq-7000.txt +++ b/Documentation/devicetree/bindings/clock/zynq-7000.txt @@ -6,50 +6,99 @@ The purpose of this document is to document their usage. See clock_bindings.txt for more information on the generic clock bindings. See Chapter 25 of Zynq TRM for more information about Zynq clocks. -== PLLs == - -Used to describe the ARM_PLL, DDR_PLL, and IO_PLL. +== Clock Controller == +The clock controller is a logical abstraction of Zynq's clock tree. It reads +required input clock frequencies from the devicetree and acts as clock provider +for all clock consumers of PS clocks. Required properties: -- #clock-cells : shall be 0 (only one clock is output from this node) -- compatible : "xlnx,zynq-pll" -- reg : pair of u32 values, which are the address offsets within the SLCR - of the relevant PLL_CTRL register and PLL_CFG register respectively -- clocks : phandle for parent clock. should be the phandle for ps_clk + - #clock-cells : Must be 1 + - compatible : "xlnx,ps7-clkc" + - ps-clk-frequency : Frequency of the oscillator providing ps_clk in HZ + (usually 33 MHz oscillators are used for Zynq platforms) + - clock-output-names : List of strings used to name the clock outputs. Shall be + a list of the outputs given below. Optional properties: -- clock-output-names : name of the output clock + - clocks : as described in the clock bindings + - clock-names : as described in the clock bindings + +Clock inputs: +The following strings are optional parameters to the 'clock-names' property in +order to provide an optional (E)MIO clock source. + - swdt_ext_clk + - gem0_emio_clk + - gem1_emio_clk + - mio_clk_XX # with XX = 00..53 +... + +Clock outputs: + 0: armpll + 1: ddrpll + 2: iopll + 3: cpu_6or4x + 4: cpu_3or2x + 5: cpu_2x + 6: cpu_1x + 7: ddr2x + 8: ddr3x + 9: dci + 10: lqspi + 11: smc + 12: pcap + 13: gem0 + 14: gem1 + 15: fclk0 + 16: fclk1 + 17: fclk2 + 18: fclk3 + 19: can0 + 20: can1 + 21: sdio0 + 22: sdio1 + 23: uart0 + 24: uart1 + 25: spi0 + 26: spi1 + 27: dma + 28: usb0_aper + 29: usb1_aper + 30: gem0_aper + 31: gem1_aper + 32: sdio0_aper + 33: sdio1_aper + 34: spi0_aper + 35: spi1_aper + 36: can0_aper + 37: can1_aper + 38: i2c0_aper + 39: i2c1_aper + 40: uart0_aper + 41: uart1_aper + 42: gpio_aper + 43: lqspi_aper + 44: smc_aper + 45: swdt + 46: dbg_trc + 47: dbg_apb Example: - armpll: armpll { - #clock-cells = <0>; - compatible = "xlnx,zynq-pll"; - clocks = <&ps_clk>; - reg = <0x100 0x110>; - clock-output-names = "armpll"; - }; - -== Peripheral clocks == - -Describes clock node for the SDIO, SMC, SPI, QSPI, and UART clocks. - -Required properties: -- #clock-cells : shall be 1 -- compatible : "xlnx,zynq-periph-clock" -- reg : a single u32 value, describing the offset within the SLCR where - the CLK_CTRL register is found for this peripheral -- clocks : phandle for parent clocks. should hold phandles for - the IO_PLL, ARM_PLL, and DDR_PLL in order -- clock-output-names : names of the output clock(s). For peripherals that have - two output clocks (for example, the UART), two clocks - should be listed. - -Example: - uart_clk: uart_clk { + clkc: clkc { #clock-cells = <1>; - compatible = "xlnx,zynq-periph-clock"; - clocks = <&iopll &armpll &ddrpll>; - reg = <0x154>; - clock-output-names = "uart0_ref_clk", - "uart1_ref_clk"; + compatible = "xlnx,ps7-clkc"; + ps-clk-frequency = <33333333>; + clock-output-names = "armpll", "ddrpll", "iopll", "cpu_6or4x", + "cpu_3or2x", "cpu_2x", "cpu_1x", "ddr2x", "ddr3x", + "dci", "lqspi", "smc", "pcap", "gem0", "gem1", + "fclk0", "fclk1", "fclk2", "fclk3", "can0", "can1", + "sdio0", "sdio1", "uart0", "uart1", "spi0", "spi1", + "dma", "usb0_aper", "usb1_aper", "gem0_aper", + "gem1_aper", "sdio0_aper", "sdio1_aper", + "spi0_aper", "spi1_aper", "can0_aper", "can1_aper", + "i2c0_aper", "i2c1_aper", "uart0_aper", "uart1_aper", + "gpio_aper", "lqspi_aper", "smc_aper", "swdt", + "dbg_trc", "dbg_apb"; + # optional props + clocks = <&clkc 16>, <&clk_foo>; + clock-names = "gem1_emio_clk", "can_mio_clk_23"; }; diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile index 4823c3121ee2..4c904a8e458a 100644 --- a/arch/arm/boot/dts/Makefile +++ b/arch/arm/boot/dts/Makefile @@ -216,7 +216,9 @@ dtb-$(CONFIG_ARCH_VT8500) += vt8500-bv07.dtb \ wm8650-mid.dtb \ wm8750-apc8750.dtb \ wm8850-w70v2.dtb -dtb-$(CONFIG_ARCH_ZYNQ) += zynq-zc702.dtb +dtb-$(CONFIG_ARCH_ZYNQ) += zynq-zc702.dtb \ + zynq-zc706.dtb \ + zynq-zed.dtb targets += dtbs targets += $(dtb-y) diff --git a/arch/arm/boot/dts/zynq-7000.dtsi b/arch/arm/boot/dts/zynq-7000.dtsi index 14fb2e609bab..6f54a64850eb 100644 --- a/arch/arm/boot/dts/zynq-7000.dtsi +++ b/arch/arm/boot/dts/zynq-7000.dtsi @@ -49,16 +49,20 @@ uart0: uart@e0000000 { compatible = "xlnx,xuartps"; + status = "disabled"; + clocks = <&clkc 23>, <&clkc 40>; + clock-names = "ref_clk", "aper_clk"; reg = <0xE0000000 0x1000>; interrupts = <0 27 4>; - clocks = <&uart_clk 0>; }; uart1: uart@e0001000 { compatible = "xlnx,xuartps"; + status = "disabled"; + clocks = <&clkc 24>, <&clkc 41>; + clock-names = "ref_clk", "aper_clk"; reg = <0xE0001000 0x1000>; interrupts = <0 50 4>; - clocks = <&uart_clk 1>; }; slcr: slcr@f8000000 { @@ -69,50 +73,21 @@ #address-cells = <1>; #size-cells = <0>; - ps_clk: ps_clk { - #clock-cells = <0>; - compatible = "fixed-clock"; - /* clock-frequency set in board-specific file */ - clock-output-names = "ps_clk"; - }; - armpll: armpll { - #clock-cells = <0>; - compatible = "xlnx,zynq-pll"; - clocks = <&ps_clk>; - reg = <0x100 0x110>; - clock-output-names = "armpll"; - }; - ddrpll: ddrpll { - #clock-cells = <0>; - compatible = "xlnx,zynq-pll"; - clocks = <&ps_clk>; - reg = <0x104 0x114>; - clock-output-names = "ddrpll"; - }; - iopll: iopll { - #clock-cells = <0>; - compatible = "xlnx,zynq-pll"; - clocks = <&ps_clk>; - reg = <0x108 0x118>; - clock-output-names = "iopll"; - }; - uart_clk: uart_clk { + clkc: clkc { #clock-cells = <1>; - compatible = "xlnx,zynq-periph-clock"; - clocks = <&iopll &armpll &ddrpll>; - reg = <0x154>; - clock-output-names = "uart0_ref_clk", - "uart1_ref_clk"; - }; - cpu_clk: cpu_clk { - #clock-cells = <1>; - compatible = "xlnx,zynq-cpu-clock"; - clocks = <&iopll &armpll &ddrpll>; - reg = <0x120 0x1C4>; - clock-output-names = "cpu_6x4x", - "cpu_3x2x", - "cpu_2x", - "cpu_1x"; + compatible = "xlnx,ps7-clkc"; + ps-clk-frequency = <33333333>; + clock-output-names = "armpll", "ddrpll", "iopll", "cpu_6or4x", + "cpu_3or2x", "cpu_2x", "cpu_1x", "ddr2x", "ddr3x", + "dci", "lqspi", "smc", "pcap", "gem0", "gem1", + "fclk0", "fclk1", "fclk2", "fclk3", "can0", "can1", + "sdio0", "sdio1", "uart0", "uart1", "spi0", "spi1", + "dma", "usb0_aper", "usb1_aper", "gem0_aper", + "gem1_aper", "sdio0_aper", "sdio1_aper", + "spi0_aper", "spi1_aper", "can0_aper", "can1_aper", + "i2c0_aper", "i2c1_aper", "uart0_aper", "uart1_aper", + "gpio_aper", "lqspi_aper", "smc_aper", "swdt", + "dbg_trc", "dbg_apb"; }; }; }; @@ -121,9 +96,8 @@ interrupt-parent = <&intc>; interrupts = < 0 10 4 0 11 4 0 12 4 >; compatible = "cdns,ttc"; + clocks = <&clkc 6>; reg = <0xF8001000 0x1000>; - clocks = <&cpu_clk 3>; - clock-names = "cpu_1x"; clock-ranges; }; @@ -131,9 +105,8 @@ interrupt-parent = <&intc>; interrupts = < 0 37 4 0 38 4 0 39 4 >; compatible = "cdns,ttc"; + clocks = <&clkc 6>; reg = <0xF8002000 0x1000>; - clocks = <&cpu_clk 3>; - clock-names = "cpu_1x"; clock-ranges; }; scutimer: scutimer@f8f00600 { @@ -141,7 +114,7 @@ interrupts = < 1 13 0x301 >; compatible = "arm,cortex-a9-twd-timer"; reg = < 0xf8f00600 0x20 >; - clocks = <&cpu_clk 1>; + clocks = <&clkc 4>; } ; }; }; diff --git a/arch/arm/boot/dts/zynq-zc702.dts b/arch/arm/boot/dts/zynq-zc702.dts index 86f44d5b0265..21aea99a067b 100644 --- a/arch/arm/boot/dts/zynq-zc702.dts +++ b/arch/arm/boot/dts/zynq-zc702.dts @@ -24,11 +24,11 @@ }; chosen { - bootargs = "console=ttyPS1,115200 earlyprintk"; + bootargs = "console=ttyPS0,115200 earlyprintk"; }; }; -&ps_clk { - clock-frequency = <33333330>; +&uart1 { + status = "okay"; }; diff --git a/arch/arm/boot/dts/zynq-zc706.dts b/arch/arm/boot/dts/zynq-zc706.dts new file mode 100644 index 000000000000..79009e0b74b9 --- /dev/null +++ b/arch/arm/boot/dts/zynq-zc706.dts @@ -0,0 +1,35 @@ +/* + * Copyright (C) 2011 Xilinx + * Copyright (C) 2012 National Instruments Corp. + * Copyright (C) 2013 Xilinx + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ +/dts-v1/; +/include/ "zynq-7000.dtsi" + +/ { + model = "Zynq ZC706 Development Board"; + compatible = "xlnx,zynq-zc706", "xlnx,zynq-7000"; + + memory { + device_type = "memory"; + reg = <0 0x40000000>; + }; + + chosen { + bootargs = "console=ttyPS0,115200 earlyprintk"; + }; + +}; + +&uart1 { + status = "okay"; +}; diff --git a/arch/arm/boot/dts/zynq-zed.dts b/arch/arm/boot/dts/zynq-zed.dts new file mode 100644 index 000000000000..d6acf2b1cdf4 --- /dev/null +++ b/arch/arm/boot/dts/zynq-zed.dts @@ -0,0 +1,35 @@ +/* + * Copyright (C) 2011 Xilinx + * Copyright (C) 2012 National Instruments Corp. + * Copyright (C) 2013 Xilinx + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ +/dts-v1/; +/include/ "zynq-7000.dtsi" + +/ { + model = "Zynq Zed Development Board"; + compatible = "xlnx,zynq-7000"; + + memory { + device_type = "memory"; + reg = <0 0x20000000>; + }; + + chosen { + bootargs = "console=ttyPS0,115200 earlyprintk"; + }; + +}; + +&uart1 { + status = "okay"; +}; diff --git a/arch/arm/mach-zynq/common.c b/arch/arm/mach-zynq/common.c index 5bfe7035b73d..7e3d5f400aad 100644 --- a/arch/arm/mach-zynq/common.c +++ b/arch/arm/mach-zynq/common.c @@ -98,7 +98,6 @@ static void zynq_system_reset(char mode, const char *cmd) } static const char * const zynq_dt_match[] = { - "xlnx,zynq-zc702", "xlnx,zynq-7000", NULL }; diff --git a/arch/arm/mach-zynq/slcr.c b/arch/arm/mach-zynq/slcr.c index c70969b9c258..50d008d8f87f 100644 --- a/arch/arm/mach-zynq/slcr.c +++ b/arch/arm/mach-zynq/slcr.c @@ -117,7 +117,7 @@ int __init zynq_slcr_init(void) pr_info("%s mapped to %p\n", np->name, zynq_slcr_base); - xilinx_zynq_clocks_init(zynq_slcr_base); + zynq_clock_init(zynq_slcr_base); of_node_put(np); diff --git a/drivers/clk/Makefile b/drivers/clk/Makefile index 137d3e730f86..fa435bcf9f1a 100644 --- a/drivers/clk/Makefile +++ b/drivers/clk/Makefile @@ -27,7 +27,7 @@ obj-$(CONFIG_MACH_LOONGSON1) += clk-ls1x.o obj-$(CONFIG_ARCH_SUNXI) += sunxi/ obj-$(CONFIG_ARCH_U8500) += ux500/ obj-$(CONFIG_ARCH_VT8500) += clk-vt8500.o -obj-$(CONFIG_ARCH_ZYNQ) += clk-zynq.o +obj-$(CONFIG_ARCH_ZYNQ) += zynq/ obj-$(CONFIG_ARCH_TEGRA) += tegra/ obj-$(CONFIG_PLAT_SAMSUNG) += samsung/ diff --git a/drivers/clk/clk-zynq.c b/drivers/clk/clk-zynq.c deleted file mode 100644 index 32062977f453..000000000000 --- a/drivers/clk/clk-zynq.c +++ /dev/null @@ -1,378 +0,0 @@ -/* - * Copyright (c) 2012 National Instruments - * - * Josh Cartwright <josh.cartwright@ni.com> - * - * This program is free software; you can redistribute it and/or modify it - * under the terms and conditions of the GNU General Public License, - * version 2, as published by the Free Software Foundation. - * - * This program is distributed in the hope it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for - * more details. - * - * You should have received a copy of the GNU General Public License along with - * this program. If not, see <http://www.gnu.org/licenses/>. - */ -#include <linux/io.h> -#include <linux/of.h> -#include <linux/slab.h> -#include <linux/kernel.h> -#include <linux/clk-provider.h> -#include <linux/clk/zynq.h> - -static void __iomem *slcr_base; - -struct zynq_pll_clk { - struct clk_hw hw; - void __iomem *pll_ctrl; - void __iomem *pll_cfg; -}; - -#define to_zynq_pll_clk(hw) container_of(hw, struct zynq_pll_clk, hw) - -#define CTRL_PLL_FDIV(x) ((x) >> 12) - -static unsigned long zynq_pll_recalc_rate(struct clk_hw *hw, - unsigned long parent_rate) -{ - struct zynq_pll_clk *pll = to_zynq_pll_clk(hw); - return parent_rate * CTRL_PLL_FDIV(ioread32(pll->pll_ctrl)); -} - -static const struct clk_ops zynq_pll_clk_ops = { - .recalc_rate = zynq_pll_recalc_rate, -}; - -static void __init zynq_pll_clk_setup(struct device_node *np) -{ - struct clk_init_data init; - struct zynq_pll_clk *pll; - const char *parent_name; - struct clk *clk; - u32 regs[2]; - int ret; - - ret = of_property_read_u32_array(np, "reg", regs, ARRAY_SIZE(regs)); - if (WARN_ON(ret)) - return; - - pll = kzalloc(sizeof(*pll), GFP_KERNEL); - if (WARN_ON(!pll)) - return; - - pll->pll_ctrl = slcr_base + regs[0]; - pll->pll_cfg = slcr_base + regs[1]; - - of_property_read_string(np, "clock-output-names", &init.name); - - init.ops = &zynq_pll_clk_ops; - parent_name = of_clk_get_parent_name(np, 0); - init.parent_names = &parent_name; - init.num_parents = 1; - - pll->hw.init = &init; - - clk = clk_register(NULL, &pll->hw); - if (WARN_ON(IS_ERR(clk))) - return; - - ret = of_clk_add_provider(np, of_clk_src_simple_get, clk); - if (WARN_ON(ret)) - return; -} -CLK_OF_DECLARE(zynq_pll, "xlnx,zynq-pll", zynq_pll_clk_setup); - -struct zynq_periph_clk { - struct clk_hw hw; - struct clk_onecell_data onecell_data; - struct clk *gates[2]; - void __iomem *clk_ctrl; - spinlock_t clkact_lock; -}; - -#define to_zynq_periph_clk(hw) container_of(hw, struct zynq_periph_clk, hw) - -static const u8 periph_clk_parent_map[] = { - 0, 0, 1, 2 -}; -#define PERIPH_CLK_CTRL_SRC(x) (periph_clk_parent_map[((x) & 0x30) >> 4]) -#define PERIPH_CLK_CTRL_DIV(x) (((x) & 0x3F00) >> 8) - -static unsigned long zynq_periph_recalc_rate(struct clk_hw *hw, - unsigned long parent_rate) -{ - struct zynq_periph_clk *periph = to_zynq_periph_clk(hw); - return parent_rate / PERIPH_CLK_CTRL_DIV(ioread32(periph->clk_ctrl)); -} - -static u8 zynq_periph_get_parent(struct clk_hw *hw) -{ - struct zynq_periph_clk *periph = to_zynq_periph_clk(hw); - return PERIPH_CLK_CTRL_SRC(ioread32(periph->clk_ctrl)); -} - -static const struct clk_ops zynq_periph_clk_ops = { - .recalc_rate = zynq_periph_recalc_rate, - .get_parent = zynq_periph_get_parent, -}; - -static void __init zynq_periph_clk_setup(struct device_node *np) -{ - struct zynq_periph_clk *periph; - const char *parent_names[3]; - struct clk_init_data init; - int clk_num = 0, err; - const char *name; - struct clk *clk; - u32 reg; - int i; - - err = of_property_read_u32(np, "reg", ®); - if (WARN_ON(err)) - return; - - periph = kzalloc(sizeof(*periph), GFP_KERNEL); - if (WARN_ON(!periph)) - return; - - periph->clk_ctrl = slcr_base + reg; - spin_lock_init(&periph->clkact_lock); - - init.name = np->name; - init.ops = &zynq_periph_clk_ops; - for (i = 0; i < ARRAY_SIZE(parent_names); i++) - parent_names[i] = of_clk_get_parent_name(np, i); - init.parent_names = parent_names; - init.num_parents = ARRAY_SIZE(parent_names); - - periph->hw.init = &init; - - clk = clk_register(NULL, &periph->hw); - if (WARN_ON(IS_ERR(clk))) - return; - - err = of_clk_add_provider(np, of_clk_src_simple_get, clk); - if (WARN_ON(err)) - return; - - err = of_property_read_string_index(np, "clock-output-names", 0, - &name); - if (WARN_ON(err)) - return; - - periph->gates[0] = clk_register_gate(NULL, name, np->name, 0, - periph->clk_ctrl, 0, 0, - &periph->clkact_lock); - if (WARN_ON(IS_ERR(periph->gates[0]))) - return; - clk_num++; - - /* some periph clks have 2 downstream gates */ - err = of_property_read_string_index(np, "clock-output-names", 1, - &name); - if (err != -ENODATA) { - periph->gates[1] = clk_register_gate(NULL, name, np->name, 0, - periph->clk_ctrl, 1, 0, - &periph->clkact_lock); - if (WARN_ON(IS_ERR(periph->gates[1]))) - return; - clk_num++; - } - - periph->onecell_data.clks = periph->gates; - periph->onecell_data.clk_num = clk_num; - - err = of_clk_add_provider(np, of_clk_src_onecell_get, - &periph->onecell_data); - if (WARN_ON(err)) - return; -} -CLK_OF_DECLARE(zynq_periph, "xlnx,zynq-periph-clock", zynq_periph_clk_setup); - -/* CPU Clock domain is modelled as a mux with 4 children subclks, whose - * derivative rates depend on CLK_621_TRUE - */ - -struct zynq_cpu_clk { - struct clk_hw hw; - struct clk_onecell_data onecell_data; - struct clk *subclks[4]; - void __iomem *clk_ctrl; - spinlock_t clkact_lock; -}; - -#define to_zynq_cpu_clk(hw) container_of(hw, struct zynq_cpu_clk, hw) - -static const u8 zynq_cpu_clk_parent_map[] = { - 1, 1, 2, 0 -}; -#define CPU_CLK_SRCSEL(x) (zynq_cpu_clk_parent_map[(((x) & 0x30) >> 4)]) -#define CPU_CLK_CTRL_DIV(x) (((x) & 0x3F00) >> 8) - -static u8 zynq_cpu_clk_get_parent(struct clk_hw *hw) -{ - struct zynq_cpu_clk *cpuclk = to_zynq_cpu_clk(hw); - return CPU_CLK_SRCSEL(ioread32(cpuclk->clk_ctrl)); -} - -static unsigned long zynq_cpu_clk_recalc_rate(struct clk_hw *hw, - unsigned long parent_rate) -{ - struct zynq_cpu_clk *cpuclk = to_zynq_cpu_clk(hw); - return parent_rate / CPU_CLK_CTRL_DIV(ioread32(cpuclk->clk_ctrl)); -} - -static const struct clk_ops zynq_cpu_clk_ops = { - .get_parent = zynq_cpu_clk_get_parent, - .recalc_rate = zynq_cpu_clk_recalc_rate, -}; - -struct zynq_cpu_subclk { - struct clk_hw hw; - void __iomem *clk_621; - enum { - CPU_SUBCLK_6X4X, - CPU_SUBCLK_3X2X, - CPU_SUBCLK_2X, - CPU_SUBCLK_1X, - } which; -}; - -#define CLK_621_TRUE(x) ((x) & 1) - -#define to_zynq_cpu_subclk(hw) container_of(hw, struct zynq_cpu_subclk, hw); - -static unsigned long zynq_cpu_subclk_recalc_rate(struct clk_hw *hw, - unsigned long parent_rate) -{ - unsigned long uninitialized_var(rate); - struct zynq_cpu_subclk *subclk; - bool is_621; - - subclk = to_zynq_cpu_subclk(hw) - is_621 = CLK_621_TRUE(ioread32(subclk->clk_621)); - - switch (subclk->which) { - case CPU_SUBCLK_6X4X: - rate = parent_rate; - break; - case CPU_SUBCLK_3X2X: - rate = parent_rate / 2; - break; - case CPU_SUBCLK_2X: - rate = parent_rate / (is_621 ? 3 : 2); - break; - case CPU_SUBCLK_1X: - rate = parent_rate / (is_621 ? 6 : 4); - break; - }; - - return rate; -} - -static const struct clk_ops zynq_cpu_subclk_ops = { - .recalc_rate = zynq_cpu_subclk_recalc_rate, -}; - -static struct clk *zynq_cpu_subclk_setup(struct device_node *np, u8 which, - void __iomem *clk_621) -{ - struct zynq_cpu_subclk *subclk; - struct clk_init_data init; - struct clk *clk; - int err; - - err = of_property_read_string_index(np, "clock-output-names", - which, &init.name); - if (WARN_ON(err)) - goto err_read_output_name; - - subclk = kzalloc(sizeof(*subclk), GFP_KERNEL); - if (!subclk) - goto err_subclk_alloc; - - subclk->clk_621 = clk_621; - subclk->which = which; - - init.ops = &zynq_cpu_subclk_ops; - init.parent_names = &np->name; - init.num_parents = 1; - - subclk->hw.init = &init; - - clk = clk_register(NULL, &subclk->hw); - if (WARN_ON(IS_ERR(clk))) - goto err_clk_register; - - return clk; - -err_clk_register: - kfree(subclk); -err_subclk_alloc: -err_read_output_name: - return ERR_PTR(-EINVAL); -} - -static void __init zynq_cpu_clk_setup(struct device_node *np) -{ - struct zynq_cpu_clk *cpuclk; - const char *parent_names[3]; - struct clk_init_data init; - void __iomem *clk_621; - struct clk *clk; - u32 reg[2]; - int err; - int i; - - err = of_property_read_u32_array(np, "reg", reg, ARRAY_SIZE(reg)); - if (WARN_ON(err)) - return; - - cpuclk = kzalloc(sizeof(*cpuclk), GFP_KERNEL); - if (WARN_ON(!cpuclk)) - return; - - cpuclk->clk_ctrl = slcr_base + reg[0]; - clk_621 = slcr_base + reg[1]; - spin_lock_init(&cpuclk->clkact_lock); - - init.name = np->name; - init.ops = &zynq_cpu_clk_ops; - for (i = 0; i < ARRAY_SIZE(parent_names); i++) - parent_names[i] = of_clk_get_parent_name(np, i); - init.parent_names = parent_names; - init.num_parents = ARRAY_SIZE(parent_names); - - cpuclk->hw.init = &init; - - clk = clk_register(NULL, &cpuclk->hw); - if (WARN_ON(IS_ERR(clk))) - return; - - err = of_clk_add_provider(np, of_clk_src_simple_get, clk); - if (WARN_ON(err)) - return; - - for (i = 0; i < 4; i++) { - cpuclk->subclks[i] = zynq_cpu_subclk_setup(np, i, clk_621); - if (WARN_ON(IS_ERR(cpuclk->subclks[i]))) - return; - } - - cpuclk->onecell_data.clks = cpuclk->subclks; - cpuclk->onecell_data.clk_num = i; - - err = of_clk_add_provider(np, of_clk_src_onecell_get, - &cpuclk->onecell_data); - if (WARN_ON(err)) - return; -} -CLK_OF_DECLARE(zynq_cpu, "xlnx,zynq-cpu-clock", zynq_cpu_clk_setup); - -void __init xilinx_zynq_clocks_init(void __iomem *slcr) -{ - slcr_base = slcr; - of_clk_init(NULL); -} diff --git a/drivers/clk/zynq/Makefile b/drivers/clk/zynq/Makefile new file mode 100644 index 000000000000..156d923f4fa9 --- /dev/null +++ b/drivers/clk/zynq/Makefile @@ -0,0 +1,3 @@ +# Zynq clock specific Makefile + +obj-$(CONFIG_ARCH_ZYNQ) += clkc.o pll.o diff --git a/drivers/clk/zynq/clkc.c b/drivers/clk/zynq/clkc.c new file mode 100644 index 000000000000..5c205b60a82a --- /dev/null +++ b/drivers/clk/zynq/clkc.c @@ -0,0 +1,533 @@ +/* + * Zynq clock controller + * + * Copyright (C) 2012 - 2013 Xilinx + * + * Sören Brinkmann <soren.brinkmann@xilinx.com> + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License v2 as published by + * the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <linux/clk/zynq.h> +#include <linux/clk-provider.h> +#include <linux/of.h> +#include <linux/slab.h> +#include <linux/string.h> +#include <linux/io.h> + +static void __iomem *zynq_slcr_base_priv; + +#define SLCR_ARMPLL_CTRL (zynq_slcr_base_priv + 0x100) +#define SLCR_DDRPLL_CTRL (zynq_slcr_base_priv + 0x104) +#define SLCR_IOPLL_CTRL (zynq_slcr_base_priv + 0x108) +#define SLCR_PLL_STATUS (zynq_slcr_base_priv + 0x10c) +#define SLCR_ARM_CLK_CTRL (zynq_slcr_base_priv + 0x120) +#define SLCR_DDR_CLK_CTRL (zynq_slcr_base_priv + 0x124) +#define SLCR_DCI_CLK_CTRL (zynq_slcr_base_priv + 0x128) +#define SLCR_APER_CLK_CTRL (zynq_slcr_base_priv + 0x12c) +#define SLCR_GEM0_CLK_CTRL (zynq_slcr_base_priv + 0x140) +#define SLCR_GEM1_CLK_CTRL (zynq_slcr_base_priv + 0x144) +#define SLCR_SMC_CLK_CTRL (zynq_slcr_base_priv + 0x148) +#define SLCR_LQSPI_CLK_CTRL (zynq_slcr_base_priv + 0x14c) +#define SLCR_SDIO_CLK_CTRL (zynq_slcr_base_priv + 0x150) +#define SLCR_UART_CLK_CTRL (zynq_slcr_base_priv + 0x154) +#define SLCR_SPI_CLK_CTRL (zynq_slcr_base_priv + 0x158) +#define SLCR_CAN_CLK_CTRL (zynq_slcr_base_priv + 0x15c) +#define SLCR_CAN_MIOCLK_CTRL (zynq_slcr_base_priv + 0x160) +#define SLCR_DBG_CLK_CTRL (zynq_slcr_base_priv + 0x164) +#define SLCR_PCAP_CLK_CTRL (zynq_slcr_base_priv + 0x168) +#define SLCR_FPGA0_CLK_CTRL (zynq_slcr_base_priv + 0x170) +#define SLCR_621_TRUE (zynq_slcr_base_priv + 0x1c4) +#define SLCR_SWDT_CLK_SEL (zynq_slcr_base_priv + 0x304) + +#define NUM_MIO_PINS 54 + +enum zynq_clk { + armpll, ddrpll, iopll, + cpu_6or4x, cpu_3or2x, cpu_2x, cpu_1x, + ddr2x, ddr3x, dci, + lqspi, smc, pcap, gem0, gem1, fclk0, fclk1, fclk2, fclk3, can0, can1, + sdio0, sdio1, uart0, uart1, spi0, spi1, dma, + usb0_aper, usb1_aper, gem0_aper, gem1_aper, + sdio0_aper, sdio1_aper, spi0_aper, spi1_aper, can0_aper, can1_aper, + i2c0_aper, i2c1_aper, uart0_aper, uart1_aper, gpio_aper, lqspi_aper, + smc_aper, swdt, dbg_trc, dbg_apb, clk_max}; + +static struct clk *ps_clk; +static struct clk *clks[clk_max]; +static struct clk_onecell_data clk_data; + +static DEFINE_SPINLOCK(armpll_lock); +static DEFINE_SPINLOCK(ddrpll_lock); +static DEFINE_SPINLOCK(iopll_lock); +static DEFINE_SPINLOCK(armclk_lock); +static DEFINE_SPINLOCK(ddrclk_lock); +static DEFINE_SPINLOCK(dciclk_lock); +static DEFINE_SPINLOCK(gem0clk_lock); +static DEFINE_SPINLOCK(gem1clk_lock); +static DEFINE_SPINLOCK(canclk_lock); +static DEFINE_SPINLOCK(canmioclk_lock); +static DEFINE_SPINLOCK(dbgclk_lock); +static DEFINE_SPINLOCK(aperclk_lock); + +static const char dummy_nm[] __initconst = "dummy_name"; + +static const char *armpll_parents[] __initdata = {"armpll_int", "ps_clk"}; +static const char *ddrpll_parents[] __initdata = {"ddrpll_int", "ps_clk"}; +static const char *iopll_parents[] __initdata = {"iopll_int", "ps_clk"}; +static const char *gem0_mux_parents[] __initdata = {"gem0_div1", dummy_nm}; +static const char *gem1_mux_parents[] __initdata = {"gem1_div1", dummy_nm}; +static const char *can0_mio_mux2_parents[] __initdata = {"can0_gate", + "can0_mio_mux"}; +static const char *can1_mio_mux2_parents[] __initdata = {"can1_gate", + "can1_mio_mux"}; +static const char *dbg_emio_mux_parents[] __initdata = {"dbg_div", + dummy_nm}; + +static const char *dbgtrc_emio_input_names[] __initdata = {"trace_emio_clk"}; +static const char *gem0_emio_input_names[] __initdata = {"gem0_emio_clk"}; +static const char *gem1_emio_input_names[] __initdata = {"gem1_emio_clk"}; +static const char *swdt_ext_clk_input_names[] __initdata = {"swdt_ext_clk"}; + +static void __init zynq_clk_register_fclk(enum zynq_clk fclk, + const char *clk_name, void __iomem *fclk_ctrl_reg, + const char **parents) +{ + struct clk *clk; + char *mux_name; + char *div0_name; + char *div1_name; + spinlock_t *fclk_lock; + spinlock_t *fclk_gate_lock; + void __iomem *fclk_gate_reg = fclk_ctrl_reg + 8; + + fclk_lock = kmalloc(sizeof(*fclk_lock), GFP_KERNEL); + if (!fclk_lock) + goto err; + fclk_gate_lock = kmalloc(sizeof(*fclk_gate_lock), GFP_KERNEL); + if (!fclk_gate_lock) + goto err; + spin_lock_init(fclk_lock); + spin_lock_init(fclk_gate_lock); + + mux_name = kasprintf(GFP_KERNEL, "%s_mux", clk_name); + div0_name = kasprintf(GFP_KERNEL, "%s_div0", clk_name); + div1_name = kasprintf(GFP_KERNEL, "%s_div1", clk_name); + + clk = clk_register_mux(NULL, mux_name, parents, 4, 0, + fclk_ctrl_reg, 4, 2, 0, fclk_lock); + + clk = clk_register_divider(NULL, div0_name, mux_name, + 0, fclk_ctrl_reg, 8, 6, CLK_DIVIDER_ONE_BASED | + CLK_DIVIDER_ALLOW_ZERO, fclk_lock); + + clk = clk_register_divider(NULL, div1_name, div0_name, + CLK_SET_RATE_PARENT, fclk_ctrl_reg, 20, 6, + CLK_DIVIDER_ONE_BASED | CLK_DIVIDER_ALLOW_ZERO, + fclk_lock); + + clks[fclk] = clk_register_gate(NULL, clk_name, + div1_name, CLK_SET_RATE_PARENT, fclk_gate_reg, + 0, CLK_GATE_SET_TO_DISABLE, fclk_gate_lock); + kfree(mux_name); + kfree(div0_name); + kfree(div1_name); + + return; + +err: + clks[fclk] = ERR_PTR(-ENOMEM); +} + +static void __init zynq_clk_register_periph_clk(enum zynq_clk clk0, + enum zynq_clk clk1, const char *clk_name0, + const char *clk_name1, void __iomem *clk_ctrl, + const char **parents, unsigned int two_gates) +{ + struct clk *clk; + char *mux_name; + char *div_name; + spinlock_t *lock; + + lock = kmalloc(sizeof(*lock), GFP_KERNEL); + if (!lock) + goto err; + spin_lock_init(lock); + + mux_name = kasprintf(GFP_KERNEL, "%s_mux", clk_name0); + div_name = kasprintf(GFP_KERNEL, "%s_div", clk_name0); + + clk = clk_register_mux(NULL, mux_name, parents, 4, 0, + clk_ctrl, 4, 2, 0, lock); + + clk = clk_register_divider(NULL, div_name, mux_name, 0, clk_ctrl, 8, 6, + CLK_DIVIDER_ONE_BASED | CLK_DIVIDER_ALLOW_ZERO, lock); + + clks[clk0] = clk_register_gate(NULL, clk_name0, div_name, + CLK_SET_RATE_PARENT, clk_ctrl, 0, 0, lock); + if (two_gates) + clks[clk1] = clk_register_gate(NULL, clk_name1, div_name, + CLK_SET_RATE_PARENT, clk_ctrl, 1, 0, lock); + + kfree(mux_name); + kfree(div_name); + + return; + +err: + clks[clk0] = ERR_PTR(-ENOMEM); + if (two_gates) + clks[clk1] = ERR_PTR(-ENOMEM); +} + +static void __init zynq_clk_setup(struct device_node *np) +{ + int i; + u32 tmp; + int ret; + struct clk *clk; + char *clk_name; + const char *clk_output_name[clk_max]; + const char *cpu_parents[4]; + const char *periph_parents[4]; + const char *swdt_ext_clk_mux_parents[2]; + const char *can_mio_mux_parents[NUM_MIO_PINS]; + + pr_info("Zynq clock init\n"); + + /* get clock output names from DT */ + for (i = 0; i < clk_max; i++) { + if (of_property_read_string_index(np, "clock-output-names", + i, &clk_output_name[i])) { + pr_err("%s: clock output name not in DT\n", __func__); + BUG(); + } + } + cpu_parents[0] = clk_output_name[armpll]; + cpu_parents[1] = clk_output_name[armpll]; + cpu_parents[2] = clk_output_name[ddrpll]; + cpu_parents[3] = clk_output_name[iopll]; + periph_parents[0] = clk_output_name[iopll]; + periph_parents[1] = clk_output_name[iopll]; + periph_parents[2] = clk_output_name[armpll]; + periph_parents[3] = clk_output_name[ddrpll]; + + /* ps_clk */ + ret = of_property_read_u32(np, "ps-clk-frequency", &tmp); + if (ret) { + pr_warn("ps_clk frequency not specified, using 33 MHz.\n"); + tmp = 33333333; + } + ps_clk = clk_register_fixed_rate(NULL, "ps_clk", NULL, CLK_IS_ROOT, + tmp); + + /* PLLs */ + clk = clk_register_zynq_pll("armpll_int", "ps_clk", SLCR_ARMPLL_CTRL, + SLCR_PLL_STATUS, 0, &armpll_lock); + clks[armpll] = clk_register_mux(NULL, clk_output_name[armpll], + armpll_parents, 2, 0, SLCR_ARMPLL_CTRL, 4, 1, 0, + &armpll_lock); + + clk = clk_register_zynq_pll("ddrpll_int", "ps_clk", SLCR_DDRPLL_CTRL, + SLCR_PLL_STATUS, 1, &ddrpll_lock); + clks[ddrpll] = clk_register_mux(NULL, clk_output_name[ddrpll], + ddrpll_parents, 2, 0, SLCR_DDRPLL_CTRL, 4, 1, 0, + &ddrpll_lock); + + clk = clk_register_zynq_pll("iopll_int", "ps_clk", SLCR_IOPLL_CTRL, + SLCR_PLL_STATUS, 2, &iopll_lock); + clks[iopll] = clk_register_mux(NULL, clk_output_name[iopll], + iopll_parents, 2, 0, SLCR_IOPLL_CTRL, 4, 1, 0, + &iopll_lock); + + /* CPU clocks */ + tmp = readl(SLCR_621_TRUE) & 1; + clk = clk_register_mux(NULL, "cpu_mux", cpu_parents, 4, 0, + SLCR_ARM_CLK_CTRL, 4, 2, 0, &armclk_lock); + clk = clk_register_divider(NULL, "cpu_div", "cpu_mux", 0, + SLCR_ARM_CLK_CTRL, 8, 6, CLK_DIVIDER_ONE_BASED | + CLK_DIVIDER_ALLOW_ZERO, &armclk_lock); + + clks[cpu_6or4x] = clk_register_gate(NULL, clk_output_name[cpu_6or4x], + "cpu_div", CLK_SET_RATE_PARENT | CLK_IGNORE_UNUSED, + SLCR_ARM_CLK_CTRL, 24, 0, &armclk_lock); + + clk = clk_register_fixed_factor(NULL, "cpu_3or2x_div", "cpu_div", 0, + 1, 2); + clks[cpu_3or2x] = clk_register_gate(NULL, clk_output_name[cpu_3or2x], + "cpu_3or2x_div", CLK_IGNORE_UNUSED, + SLCR_ARM_CLK_CTRL, 25, 0, &armclk_lock); + + clk = clk_register_fixed_factor(NULL, "cpu_2x_div", "cpu_div", 0, 1, + 2 + tmp); + clks[cpu_2x] = clk_register_gate(NULL, clk_output_name[cpu_2x], + "cpu_2x_div", CLK_IGNORE_UNUSED, SLCR_ARM_CLK_CTRL, + 26, 0, &armclk_lock); + + clk = clk_register_fixed_factor(NULL, "cpu_1x_div", "cpu_div", 0, 1, + 4 + 2 * tmp); + clks[cpu_1x] = clk_register_gate(NULL, clk_output_name[cpu_1x], + "cpu_1x_div", CLK_IGNORE_UNUSED, SLCR_ARM_CLK_CTRL, 27, + 0, &armclk_lock); + + /* Timers */ + swdt_ext_clk_mux_parents[0] = clk_output_name[cpu_1x]; + for (i = 0; i < ARRAY_SIZE(swdt_ext_clk_input_names); i++) { + int idx = of_property_match_string(np, "clock-names", + swdt_ext_clk_input_names[i]); + if (idx >= 0) + swdt_ext_clk_mux_parents[i + 1] = + of_clk_get_parent_name(np, idx); + else + swdt_ext_clk_mux_parents[i + 1] = dummy_nm; + } + clks[swdt] = clk_register_mux(NULL, clk_output_name[swdt], + swdt_ext_clk_mux_parents, 2, CLK_SET_RATE_PARENT, + SLCR_SWDT_CLK_SEL, 0, 1, 0, &gem0clk_lock); + + /* DDR clocks */ + clk = clk_register_divider(NULL, "ddr2x_div", "ddrpll", 0, + SLCR_DDR_CLK_CTRL, 26, 6, CLK_DIVIDER_ONE_BASED | + CLK_DIVIDER_ALLOW_ZERO, &ddrclk_lock); + clks[ddr2x] = clk_register_gate(NULL, clk_output_name[ddr2x], + "ddr2x_div", 0, SLCR_DDR_CLK_CTRL, 1, 0, &ddrclk_lock); + clk_prepare_enable(clks[ddr2x]); + clk = clk_register_divider(NULL, "ddr3x_div", "ddrpll", 0, + SLCR_DDR_CLK_CTRL, 20, 6, CLK_DIVIDER_ONE_BASED | + CLK_DIVIDER_ALLOW_ZERO, &ddrclk_lock); + clks[ddr3x] = clk_register_gate(NULL, clk_output_name[ddr3x], + "ddr3x_div", 0, SLCR_DDR_CLK_CTRL, 0, 0, &ddrclk_lock); + clk_prepare_enable(clks[ddr3x]); + + clk = clk_register_divider(NULL, "dci_div0", "ddrpll", 0, + SLCR_DCI_CLK_CTRL, 8, 6, CLK_DIVIDER_ONE_BASED | + CLK_DIVIDER_ALLOW_ZERO, &dciclk_lock); + clk = clk_register_divider(NULL, "dci_div1", "dci_div0", + CLK_SET_RATE_PARENT, SLCR_DCI_CLK_CTRL, 20, 6, + CLK_DIVIDER_ONE_BASED | CLK_DIVIDER_ALLOW_ZERO, + &dciclk_lock); + clks[dci] = clk_register_gate(NULL, clk_output_name[dci], "dci_div1", + CLK_SET_RATE_PARENT, SLCR_DCI_CLK_CTRL, 0, 0, + &dciclk_lock); + clk_prepare_enable(clks[dci]); + + /* Peripheral clocks */ + for (i = fclk0; i <= fclk3; i++) + zynq_clk_register_fclk(i, clk_output_name[i], + SLCR_FPGA0_CLK_CTRL + 0x10 * (i - fclk0), + periph_parents); + + zynq_clk_register_periph_clk(lqspi, 0, clk_output_name[lqspi], NULL, + SLCR_LQSPI_CLK_CTRL, periph_parents, 0); + + zynq_clk_register_periph_clk(smc, 0, clk_output_name[smc], NULL, + SLCR_SMC_CLK_CTRL, periph_parents, 0); + + zynq_clk_register_periph_clk(pcap, 0, clk_output_name[pcap], NULL, + SLCR_PCAP_CLK_CTRL, periph_parents, 0); + + zynq_clk_register_periph_clk(sdio0, sdio1, clk_output_name[sdio0], + clk_output_name[sdio1], SLCR_SDIO_CLK_CTRL, + periph_parents, 1); + + zynq_clk_register_periph_clk(uart0, uart1, clk_output_name[uart0], + clk_output_name[uart1], SLCR_UART_CLK_CTRL, + periph_parents, 1); + + zynq_clk_register_periph_clk(spi0, spi1, clk_output_name[spi0], + clk_output_name[spi1], SLCR_SPI_CLK_CTRL, + periph_parents, 1); + + for (i = 0; i < ARRAY_SIZE(gem0_emio_input_names); i++) { + int idx = of_property_match_string(np, "clock-names", + gem0_emio_input_names[i]); + if (idx >= 0) + gem0_mux_parents[i + 1] = of_clk_get_parent_name(np, + idx); + } + clk = clk_register_mux(NULL, "gem0_mux", periph_parents, 4, 0, + SLCR_GEM0_CLK_CTRL, 4, 2, 0, &gem0clk_lock); + clk = clk_register_divider(NULL, "gem0_div0", "gem0_mux", 0, + SLCR_GEM0_CLK_CTRL, 8, 6, CLK_DIVIDER_ONE_BASED | + CLK_DIVIDER_ALLOW_ZERO, &gem0clk_lock); + clk = clk_register_divider(NULL, "gem0_div1", "gem0_div0", + CLK_SET_RATE_PARENT, SLCR_GEM0_CLK_CTRL, 20, 6, + CLK_DIVIDER_ONE_BASED | CLK_DIVIDER_ALLOW_ZERO, + &gem0clk_lock); + clk = clk_register_mux(NULL, "gem0_emio_mux", gem0_mux_parents, 2, 0, + SLCR_GEM0_CLK_CTRL, 6, 1, 0, &gem0clk_lock); + clks[gem0] = clk_register_gate(NULL, clk_output_name[gem0], + "gem0_emio_mux", CLK_SET_RATE_PARENT, + SLCR_GEM0_CLK_CTRL, 0, 0, &gem0clk_lock); + + for (i = 0; i < ARRAY_SIZE(gem1_emio_input_names); i++) { + int idx = of_property_match_string(np, "clock-names", + gem1_emio_input_names[i]); + if (idx >= 0) + gem1_mux_parents[i + 1] = of_clk_get_parent_name(np, + idx); + } + clk = clk_register_mux(NULL, "gem1_mux", periph_parents, 4, 0, + SLCR_GEM1_CLK_CTRL, 4, 2, 0, &gem1clk_lock); + clk = clk_register_divider(NULL, "gem1_div0", "gem1_mux", 0, + SLCR_GEM1_CLK_CTRL, 8, 6, CLK_DIVIDER_ONE_BASED | + CLK_DIVIDER_ALLOW_ZERO, &gem1clk_lock); + clk = clk_register_divider(NULL, "gem1_div1", "gem1_div0", + CLK_SET_RATE_PARENT, SLCR_GEM1_CLK_CTRL, 20, 6, + CLK_DIVIDER_ONE_BASED | CLK_DIVIDER_ALLOW_ZERO, + &gem1clk_lock); + clk = clk_register_mux(NULL, "gem1_emio_mux", gem1_mux_parents, 2, 0, + SLCR_GEM1_CLK_CTRL, 6, 1, 0, &gem1clk_lock); + clks[gem1] = clk_register_gate(NULL, clk_output_name[gem1], + "gem1_emio_mux", CLK_SET_RATE_PARENT, + SLCR_GEM1_CLK_CTRL, 0, 0, &gem1clk_lock); + + tmp = strlen("mio_clk_00x"); + clk_name = kmalloc(tmp, GFP_KERNEL); + for (i = 0; i < NUM_MIO_PINS; i++) { + int idx; + + snprintf(clk_name, tmp, "mio_clk_%2.2d", i); + idx = of_property_match_string(np, "clock-names", clk_name); + if (idx >= 0) + can_mio_mux_parents[i] = of_clk_get_parent_name(np, + idx); + else + can_mio_mux_parents[i] = dummy_nm; + } + kfree(clk_name); + clk = clk_register_mux(NULL, "can_mux", periph_parents, 4, 0, + SLCR_CAN_CLK_CTRL, 4, 2, 0, &canclk_lock); + clk = clk_register_divider(NULL, "can_div0", "can_mux", 0, + SLCR_CAN_CLK_CTRL, 8, 6, CLK_DIVIDER_ONE_BASED | + CLK_DIVIDER_ALLOW_ZERO, &canclk_lock); + clk = clk_register_divider(NULL, "can_div1", "can_div0", + CLK_SET_RATE_PARENT, SLCR_CAN_CLK_CTRL, 20, 6, + CLK_DIVIDER_ONE_BASED | CLK_DIVIDER_ALLOW_ZERO, + &canclk_lock); + clk = clk_register_gate(NULL, "can0_gate", "can_div1", + CLK_SET_RATE_PARENT, SLCR_CAN_CLK_CTRL, 0, 0, + &canclk_lock); + clk = clk_register_gate(NULL, "can1_gate", "can_div1", + CLK_SET_RATE_PARENT, SLCR_CAN_CLK_CTRL, 1, 0, + &canclk_lock); + clk = clk_register_mux(NULL, "can0_mio_mux", + can_mio_mux_parents, 54, CLK_SET_RATE_PARENT, + SLCR_CAN_MIOCLK_CTRL, 0, 6, 0, &canmioclk_lock); + clk = clk_register_mux(NULL, "can1_mio_mux", + can_mio_mux_parents, 54, CLK_SET_RATE_PARENT, + SLCR_CAN_MIOCLK_CTRL, 16, 6, 0, &canmioclk_lock); + clks[can0] = clk_register_mux(NULL, clk_output_name[can0], + can0_mio_mux2_parents, 2, CLK_SET_RATE_PARENT, + SLCR_CAN_MIOCLK_CTRL, 6, 1, 0, &canmioclk_lock); + clks[can1] = clk_register_mux(NULL, clk_output_name[can1], + can1_mio_mux2_parents, 2, CLK_SET_RATE_PARENT, + SLCR_CAN_MIOCLK_CTRL, 22, 1, 0, &canmioclk_lock); + + for (i = 0; i < ARRAY_SIZE(dbgtrc_emio_input_names); i++) { + int idx = of_property_match_string(np, "clock-names", + dbgtrc_emio_input_names[i]); + if (idx >= 0) + dbg_emio_mux_parents[i + 1] = of_clk_get_parent_name(np, + idx); + } + clk = clk_register_mux(NULL, "dbg_mux", periph_parents, 4, 0, + SLCR_DBG_CLK_CTRL, 4, 2, 0, &dbgclk_lock); + clk = clk_register_divider(NULL, "dbg_div", "dbg_mux", 0, + SLCR_DBG_CLK_CTRL, 8, 6, CLK_DIVIDER_ONE_BASED | + CLK_DIVIDER_ALLOW_ZERO, &dbgclk_lock); + clk = clk_register_mux(NULL, "dbg_emio_mux", dbg_emio_mux_parents, 2, 0, + SLCR_DBG_CLK_CTRL, 6, 1, 0, &dbgclk_lock); + clks[dbg_trc] = clk_register_gate(NULL, clk_output_name[dbg_trc], + "dbg_emio_mux", CLK_SET_RATE_PARENT, SLCR_DBG_CLK_CTRL, + 0, 0, &dbgclk_lock); + clks[dbg_apb] = clk_register_gate(NULL, clk_output_name[dbg_apb], + clk_output_name[cpu_1x], 0, SLCR_DBG_CLK_CTRL, 1, 0, + &dbgclk_lock); + + /* One gated clock for all APER clocks. */ + clks[dma] = clk_register_gate(NULL, clk_output_name[dma], + clk_output_name[cpu_2x], 0, SLCR_APER_CLK_CTRL, 0, 0, + &aperclk_lock); + clks[usb0_aper] = clk_register_gate(NULL, clk_output_name[usb0_aper], + clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 2, 0, + &aperclk_lock); + clks[usb1_aper] = clk_register_gate(NULL, clk_output_name[usb1_aper], + clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 3, 0, + &aperclk_lock); + clks[gem0_aper] = clk_register_gate(NULL, clk_output_name[gem0_aper], + clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 6, 0, + &aperclk_lock); + clks[gem1_aper] = clk_register_gate(NULL, clk_output_name[gem1_aper], + clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 7, 0, + &aperclk_lock); + clks[sdio0_aper] = clk_register_gate(NULL, clk_output_name[sdio0_aper], + clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 10, 0, + &aperclk_lock); + clks[sdio1_aper] = clk_register_gate(NULL, clk_output_name[sdio1_aper], + clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 11, 0, + &aperclk_lock); + clks[spi0_aper] = clk_register_gate(NULL, clk_output_name[spi0_aper], + clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 14, 0, + &aperclk_lock); + clks[spi1_aper] = clk_register_gate(NULL, clk_output_name[spi1_aper], + clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 15, 0, + &aperclk_lock); + clks[can0_aper] = clk_register_gate(NULL, clk_output_name[can0_aper], + clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 16, 0, + &aperclk_lock); + clks[can1_aper] = clk_register_gate(NULL, clk_output_name[can1_aper], + clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 17, 0, + &aperclk_lock); + clks[i2c0_aper] = clk_register_gate(NULL, clk_output_name[i2c0_aper], + clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 18, 0, + &aperclk_lock); + clks[i2c1_aper] = clk_register_gate(NULL, clk_output_name[i2c1_aper], + clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 19, 0, + &aperclk_lock); + clks[uart0_aper] = clk_register_gate(NULL, clk_output_name[uart0_aper], + clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 20, 0, + &aperclk_lock); + clks[uart1_aper] = clk_register_gate(NULL, clk_output_name[uart1_aper], + clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 21, 0, + &aperclk_lock); + clks[gpio_aper] = clk_register_gate(NULL, clk_output_name[gpio_aper], + clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 22, 0, + &aperclk_lock); + clks[lqspi_aper] = clk_register_gate(NULL, clk_output_name[lqspi_aper], + clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 23, 0, + &aperclk_lock); + clks[smc_aper] = clk_register_gate(NULL, clk_output_name[smc_aper], + clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 24, 0, + &aperclk_lock); + + for (i = 0; i < ARRAY_SIZE(clks); i++) { + if (IS_ERR(clks[i])) { + pr_err("Zynq clk %d: register failed with %ld\n", + i, PTR_ERR(clks[i])); + BUG(); + } + } + + clk_data.clks = clks; + clk_data.clk_num = ARRAY_SIZE(clks); + of_clk_add_provider(np, of_clk_src_onecell_get, &clk_data); +} + +CLK_OF_DECLARE(zynq_clkc, "xlnx,ps7-clkc", zynq_clk_setup); + +void __init zynq_clock_init(void __iomem *slcr_base) +{ + zynq_slcr_base_priv = slcr_base; + of_clk_init(NULL); +} diff --git a/drivers/clk/zynq/pll.c b/drivers/clk/zynq/pll.c new file mode 100644 index 000000000000..47e307c25a7b --- /dev/null +++ b/drivers/clk/zynq/pll.c @@ -0,0 +1,235 @@ +/* + * Zynq PLL driver + * + * Copyright (C) 2013 Xilinx + * + * Sören Brinkmann <soren.brinkmann@xilinx.com> + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License v2 as published by + * the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + * + */ +#include <linux/clk/zynq.h> +#include <linux/clk-provider.h> +#include <linux/slab.h> +#include <linux/io.h> + +/** + * struct zynq_pll + * @hw: Handle between common and hardware-specific interfaces + * @pll_ctrl: PLL control register + * @pll_status: PLL status register + * @lock: Register lock + * @lockbit: Indicates the associated PLL_LOCKED bit in the PLL status + * register. + */ +struct zynq_pll { + struct clk_hw hw; + void __iomem *pll_ctrl; + void __iomem *pll_status; + spinlock_t *lock; + u8 lockbit; +}; +#define to_zynq_pll(_hw) container_of(_hw, struct zynq_pll, hw) + +/* Register bitfield defines */ +#define PLLCTRL_FBDIV_MASK 0x7f000 +#define PLLCTRL_FBDIV_SHIFT 12 +#define PLLCTRL_BPQUAL_MASK (1 << 3) +#define PLLCTRL_PWRDWN_MASK 2 +#define PLLCTRL_PWRDWN_SHIFT 1 +#define PLLCTRL_RESET_MASK 1 +#define PLLCTRL_RESET_SHIFT 0 + +/** + * zynq_pll_round_rate() - Round a clock frequency + * @hw: Handle between common and hardware-specific interfaces + * @rate: Desired clock frequency + * @prate: Clock frequency of parent clock + * Returns frequency closest to @rate the hardware can generate. + */ +static long zynq_pll_round_rate(struct clk_hw *hw, unsigned long rate, + unsigned long *prate) +{ + u32 fbdiv; + + fbdiv = DIV_ROUND_CLOSEST(rate, *prate); + if (fbdiv < 13) + fbdiv = 13; + else if (fbdiv > 66) + fbdiv = 66; + + return *prate * fbdiv; +} + +/** + * zynq_pll_recalc_rate() - Recalculate clock frequency + * @hw: Handle between common and hardware-specific interfaces + * @parent_rate: Clock frequency of parent clock + * Returns current clock frequency. + */ +static unsigned long zynq_pll_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + struct zynq_pll *clk = to_zynq_pll(hw); + u32 fbdiv; + + /* + * makes probably sense to redundantly save fbdiv in the struct + * zynq_pll to save the IO access. + */ + fbdiv = (readl(clk->pll_ctrl) & PLLCTRL_FBDIV_MASK) >> + PLLCTRL_FBDIV_SHIFT; + + return parent_rate * fbdiv; +} + +/** + * zynq_pll_is_enabled - Check if a clock is enabled + * @hw: Handle between common and hardware-specific interfaces + * Returns 1 if the clock is enabled, 0 otherwise. + * + * Not sure this is a good idea, but since disabled means bypassed for + * this clock implementation we say we are always enabled. + */ +static int zynq_pll_is_enabled(struct clk_hw *hw) +{ + unsigned long flags = 0; + u32 reg; + struct zynq_pll *clk = to_zynq_pll(hw); + + spin_lock_irqsave(clk->lock, flags); + + reg = readl(clk->pll_ctrl); + + spin_unlock_irqrestore(clk->lock, flags); + + return !(reg & (PLLCTRL_RESET_MASK | PLLCTRL_PWRDWN_MASK)); +} + +/** + * zynq_pll_enable - Enable clock + * @hw: Handle between common and hardware-specific interfaces + * Returns 0 on success + */ +static int zynq_pll_enable(struct clk_hw *hw) +{ + unsigned long flags = 0; + u32 reg; + struct zynq_pll *clk = to_zynq_pll(hw); + + if (zynq_pll_is_enabled(hw)) + return 0; + + pr_info("PLL: enable\n"); + + /* Power up PLL and wait for lock */ + spin_lock_irqsave(clk->lock, flags); + + reg = readl(clk->pll_ctrl); + reg &= ~(PLLCTRL_RESET_MASK | PLLCTRL_PWRDWN_MASK); + writel(reg, clk->pll_ctrl); + while (!(readl(clk->pll_status) & (1 << clk->lockbit))) + ; + + spin_unlock_irqrestore(clk->lock, flags); + + return 0; +} + +/** + * zynq_pll_disable - Disable clock + * @hw: Handle between common and hardware-specific interfaces + * Returns 0 on success + */ +static void zynq_pll_disable(struct clk_hw *hw) +{ + unsigned long flags = 0; + u32 reg; + struct zynq_pll *clk = to_zynq_pll(hw); + + if (!zynq_pll_is_enabled(hw)) + return; + + pr_info("PLL: shutdown\n"); + + /* shut down PLL */ + spin_lock_irqsave(clk->lock, flags); + + reg = readl(clk->pll_ctrl); + reg |= PLLCTRL_RESET_MASK | PLLCTRL_PWRDWN_MASK; + writel(reg, clk->pll_ctrl); + + spin_unlock_irqrestore(clk->lock, flags); +} + +static const struct clk_ops zynq_pll_ops = { + .enable = zynq_pll_enable, + .disable = zynq_pll_disable, + .is_enabled = zynq_pll_is_enabled, + .round_rate = zynq_pll_round_rate, + .recalc_rate = zynq_pll_recalc_rate +}; + +/** + * clk_register_zynq_pll() - Register PLL with the clock framework + * @np Pointer to the DT device node + */ +struct clk *clk_register_zynq_pll(const char *name, const char *parent, + void __iomem *pll_ctrl, void __iomem *pll_status, u8 lock_index, + spinlock_t *lock) +{ + struct zynq_pll *pll; + struct clk *clk; + u32 reg; + const char *parent_arr[1] = {parent}; + unsigned long flags = 0; + struct clk_init_data initd = { + .name = name, + .parent_names = parent_arr, + .ops = &zynq_pll_ops, + .num_parents = 1, + .flags = 0 + }; + + pll = kmalloc(sizeof(*pll), GFP_KERNEL); + if (!pll) { + pr_err("%s: Could not allocate Zynq PLL clk.\n", __func__); + return ERR_PTR(-ENOMEM); + } + + /* Populate the struct */ + pll->hw.init = &initd; + pll->pll_ctrl = pll_ctrl; + pll->pll_status = pll_status; + pll->lockbit = lock_index; + pll->lock = lock; + + spin_lock_irqsave(pll->lock, flags); + + reg = readl(pll->pll_ctrl); + reg &= ~PLLCTRL_BPQUAL_MASK; + writel(reg, pll->pll_ctrl); + + spin_unlock_irqrestore(pll->lock, flags); + + clk = clk_register(NULL, &pll->hw); + if (WARN_ON(IS_ERR(clk))) + goto free_pll; + + return clk; + +free_pll: + kfree(pll); + + return clk; +} diff --git a/drivers/clocksource/cadence_ttc_timer.c b/drivers/clocksource/cadence_ttc_timer.c index 685bc60e210a..4cbe28c74631 100644 --- a/drivers/clocksource/cadence_ttc_timer.c +++ b/drivers/clocksource/cadence_ttc_timer.c @@ -51,6 +51,8 @@ #define TTC_CNT_CNTRL_DISABLE_MASK 0x1 +#define TTC_CLK_CNTRL_CSRC_MASK (1 << 5) /* clock source */ + /* * Setup the timers to use pre-scaling, using a fixed value for now that will * work across most input frequency, but it may need to be more dynamic @@ -396,8 +398,9 @@ static void __init ttc_timer_init(struct device_node *timer) { unsigned int irq; void __iomem *timer_baseaddr; - struct clk *clk; + struct clk *clk_cs, *clk_ce; static int initialized; + int clksel; if (initialized) return; @@ -421,14 +424,24 @@ static void __init ttc_timer_init(struct device_node *timer) BUG(); } - clk = of_clk_get_by_name(timer, "cpu_1x"); - if (IS_ERR(clk)) { + clksel = __raw_readl(timer_baseaddr + TTC_CLK_CNTRL_OFFSET); + clksel = !!(clksel & TTC_CLK_CNTRL_CSRC_MASK); + clk_cs = of_clk_get(timer, clksel); + if (IS_ERR(clk_cs)) { pr_err("ERROR: timer input clock not found\n"); BUG(); } - ttc_setup_clocksource(clk, timer_baseaddr); - ttc_setup_clockevent(clk, timer_baseaddr + 4, irq); + clksel = __raw_readl(timer_baseaddr + 4 + TTC_CLK_CNTRL_OFFSET); + clksel = !!(clksel & TTC_CLK_CNTRL_CSRC_MASK); + clk_ce = of_clk_get(timer, clksel); + if (IS_ERR(clk_ce)) { + pr_err("ERROR: timer input clock not found\n"); + BUG(); + } + + ttc_setup_clocksource(clk_cs, timer_baseaddr); + ttc_setup_clockevent(clk_ce, timer_baseaddr + 4, irq); pr_info("%s #0 at %p, irq=%d\n", timer->name, timer_baseaddr, irq); } diff --git a/drivers/tty/serial/xilinx_uartps.c b/drivers/tty/serial/xilinx_uartps.c index 4e5c77834c50..a4a3028103e3 100644 --- a/drivers/tty/serial/xilinx_uartps.c +++ b/drivers/tty/serial/xilinx_uartps.c @@ -14,6 +14,7 @@ #include <linux/platform_device.h> #include <linux/serial.h> #include <linux/serial_core.h> +#include <linux/slab.h> #include <linux/tty.h> #include <linux/tty_flip.h> #include <linux/console.h> @@ -138,6 +139,16 @@ #define XUARTPS_SR_TXFULL 0x00000010 /* TX FIFO full */ #define XUARTPS_SR_RXTRIG 0x00000001 /* Rx Trigger */ +/** + * struct xuartps - device data + * @refclk Reference clock + * @aperclk APB clock + */ +struct xuartps { + struct clk *refclk; + struct clk *aperclk; +}; + /** * xuartps_isr - Interrupt handler * @irq: Irq number @@ -936,34 +947,55 @@ static int xuartps_probe(struct platform_device *pdev) int rc; struct uart_port *port; struct resource *res, *res2; - struct clk *clk; + struct xuartps *xuartps_data; - clk = of_clk_get(pdev->dev.of_node, 0); - if (IS_ERR(clk)) { - dev_err(&pdev->dev, "no clock specified\n"); - return PTR_ERR(clk); + xuartps_data = kzalloc(sizeof(*xuartps_data), GFP_KERNEL); + if (!xuartps_data) + return -ENOMEM; + + xuartps_data->aperclk = clk_get(&pdev->dev, "aper_clk"); + if (IS_ERR(xuartps_data->aperclk)) { + dev_err(&pdev->dev, "aper_clk clock not found.\n"); + rc = PTR_ERR(xuartps_data->aperclk); + goto err_out_free; + } + xuartps_data->refclk = clk_get(&pdev->dev, "ref_clk"); + if (IS_ERR(xuartps_data->refclk)) { + dev_err(&pdev->dev, "ref_clk clock not found.\n"); + rc = PTR_ERR(xuartps_data->refclk); + goto err_out_clk_put_aper; } - rc = clk_prepare_enable(clk); + rc = clk_prepare_enable(xuartps_data->aperclk); if (rc) { - dev_err(&pdev->dev, "could not enable clock\n"); - return -EBUSY; + dev_err(&pdev->dev, "Unable to enable APER clock.\n"); + goto err_out_clk_put; + } + rc = clk_prepare_enable(xuartps_data->refclk); + if (rc) { + dev_err(&pdev->dev, "Unable to enable device clock.\n"); + goto err_out_clk_dis_aper; } res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!res) - return -ENODEV; + if (!res) { + rc = -ENODEV; + goto err_out_clk_disable; + } res2 = platform_get_resource(pdev, IORESOURCE_IRQ, 0); - if (!res2) - return -ENODEV; + if (!res2) { + rc = -ENODEV; + goto err_out_clk_disable; + } /* Initialize the port structure */ port = xuartps_get_port(); if (!port) { dev_err(&pdev->dev, "Cannot get uart_port structure\n"); - return -ENODEV; + rc = -ENODEV; + goto err_out_clk_disable; } else { /* Register the port. * This function also registers this device with the tty layer @@ -972,18 +1004,31 @@ static int xuartps_probe(struct platform_device *pdev) port->mapbase = res->start; port->irq = res2->start; port->dev = &pdev->dev; - port->uartclk = clk_get_rate(clk); - port->private_data = clk; + port->uartclk = clk_get_rate(xuartps_data->refclk); + port->private_data = xuartps_data; dev_set_drvdata(&pdev->dev, port); rc = uart_add_one_port(&xuartps_uart_driver, port); if (rc) { dev_err(&pdev->dev, "uart_add_one_port() failed; err=%i\n", rc); dev_set_drvdata(&pdev->dev, NULL); - return rc; + goto err_out_clk_disable; } return 0; } + +err_out_clk_disable: + clk_disable_unprepare(xuartps_data->refclk); +err_out_clk_dis_aper: + clk_disable_unprepare(xuartps_data->aperclk); +err_out_clk_put: + clk_put(xuartps_data->refclk); +err_out_clk_put_aper: + clk_put(xuartps_data->aperclk); +err_out_free: + kfree(xuartps_data); + + return rc; } /** @@ -995,14 +1040,18 @@ static int xuartps_probe(struct platform_device *pdev) static int xuartps_remove(struct platform_device *pdev) { struct uart_port *port = dev_get_drvdata(&pdev->dev); - struct clk *clk = port->private_data; + struct xuartps *xuartps_data = port->private_data; int rc; /* Remove the xuartps port from the serial core */ rc = uart_remove_one_port(&xuartps_uart_driver, port); dev_set_drvdata(&pdev->dev, NULL); port->mapbase = 0; - clk_disable_unprepare(clk); + clk_disable_unprepare(xuartps_data->refclk); + clk_disable_unprepare(xuartps_data->aperclk); + clk_put(xuartps_data->refclk); + clk_put(xuartps_data->aperclk); + kfree(xuartps_data); return rc; } diff --git a/include/linux/clk/zynq.h b/include/linux/clk/zynq.h index 56be7cd9aa8b..e062d317ccce 100644 --- a/include/linux/clk/zynq.h +++ b/include/linux/clk/zynq.h @@ -1,4 +1,5 @@ /* + * Copyright (C) 2013 Xilinx Inc. * Copyright (C) 2012 National Instruments * * This program is free software; you can redistribute it and/or modify @@ -19,6 +20,11 @@ #ifndef __LINUX_CLK_ZYNQ_H_ #define __LINUX_CLK_ZYNQ_H_ -void __init xilinx_zynq_clocks_init(void __iomem *slcr); +#include <linux/spinlock.h> +void zynq_clock_init(void __iomem *slcr); + +struct clk *clk_register_zynq_pll(const char *name, const char *parent, + void __iomem *pll_ctrl, void __iomem *pll_status, u8 lock_index, + spinlock_t *lock); #endif