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linux/drivers/clk/clk-bm1880.c
YueHaibing 59ef4da4e4 clk: bm1800: Remove set but not used variable 'fref' 
Fixes gcc '-Wunused-but-set-variable' warning:

drivers/clk/clk-bm1880.c: In function 'bm1880_pll_rate_calc':
drivers/clk/clk-bm1880.c:477:13: warning:
 variable 'fref' set but not used [-Wunused-but-set-variable]

It is never used, so remove it.

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Link: https://lkml.kernel.org/r/20191129033534.188257-1-yuehaibing@huawei.com
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
2019-12-24 00:10:33 -08:00

969 lines
27 KiB
C
Raw Blame History

// SPDX-License-Identifier: GPL-2.0+
/*
* Bitmain BM1880 SoC clock driver
*
* Copyright (c) 2019 Linaro Ltd.
* Author: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
*/
#include <linux/clk-provider.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of_address.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <dt-bindings/clock/bm1880-clock.h>
#define BM1880_CLK_MPLL_CTL 0x00
#define BM1880_CLK_SPLL_CTL 0x04
#define BM1880_CLK_FPLL_CTL 0x08
#define BM1880_CLK_DDRPLL_CTL 0x0c
#define BM1880_CLK_ENABLE0 0x00
#define BM1880_CLK_ENABLE1 0x04
#define BM1880_CLK_SELECT 0x20
#define BM1880_CLK_DIV0 0x40
#define BM1880_CLK_DIV1 0x44
#define BM1880_CLK_DIV2 0x48
#define BM1880_CLK_DIV3 0x4c
#define BM1880_CLK_DIV4 0x50
#define BM1880_CLK_DIV5 0x54
#define BM1880_CLK_DIV6 0x58
#define BM1880_CLK_DIV7 0x5c
#define BM1880_CLK_DIV8 0x60
#define BM1880_CLK_DIV9 0x64
#define BM1880_CLK_DIV10 0x68
#define BM1880_CLK_DIV11 0x6c
#define BM1880_CLK_DIV12 0x70
#define BM1880_CLK_DIV13 0x74
#define BM1880_CLK_DIV14 0x78
#define BM1880_CLK_DIV15 0x7c
#define BM1880_CLK_DIV16 0x80
#define BM1880_CLK_DIV17 0x84
#define BM1880_CLK_DIV18 0x88
#define BM1880_CLK_DIV19 0x8c
#define BM1880_CLK_DIV20 0x90
#define BM1880_CLK_DIV21 0x94
#define BM1880_CLK_DIV22 0x98
#define BM1880_CLK_DIV23 0x9c
#define BM1880_CLK_DIV24 0xa0
#define BM1880_CLK_DIV25 0xa4
#define BM1880_CLK_DIV26 0xa8
#define BM1880_CLK_DIV27 0xac
#define BM1880_CLK_DIV28 0xb0
#define to_bm1880_pll_clk(_hw) container_of(_hw, struct bm1880_pll_hw_clock, hw)
#define to_bm1880_div_clk(_hw) container_of(_hw, struct bm1880_div_hw_clock, hw)
static DEFINE_SPINLOCK(bm1880_clk_lock);
struct bm1880_clock_data {
void __iomem *pll_base;
void __iomem *sys_base;
struct clk_hw_onecell_data hw_data;
};
struct bm1880_gate_clock {
unsigned int id;
const char *name;
const char *parent;
u32 gate_reg;
s8 gate_shift;
unsigned long flags;
};
struct bm1880_mux_clock {
unsigned int id;
const char *name;
const char * const *parents;
s8 num_parents;
u32 reg;
s8 shift;
unsigned long flags;
};
struct bm1880_div_clock {
unsigned int id;
const char *name;
u32 reg;
u8 shift;
u8 width;
u32 initval;
const struct clk_div_table *table;
unsigned long flags;
};
struct bm1880_div_hw_clock {
struct bm1880_div_clock div;
void __iomem *base;
spinlock_t *lock;
struct clk_hw hw;
struct clk_init_data init;
};
struct bm1880_composite_clock {
unsigned int id;
const char *name;
const char *parent;
const char * const *parents;
unsigned int num_parents;
unsigned long flags;
u32 gate_reg;
u32 mux_reg;
u32 div_reg;
s8 gate_shift;
s8 mux_shift;
s8 div_shift;
s8 div_width;
s16 div_initval;
const struct clk_div_table *table;
};
struct bm1880_pll_clock {
unsigned int id;
const char *name;
u32 reg;
unsigned long flags;
};
struct bm1880_pll_hw_clock {
struct bm1880_pll_clock pll;
void __iomem *base;
struct clk_hw hw;
struct clk_init_data init;
};
static const struct clk_ops bm1880_pll_ops;
static const struct clk_ops bm1880_clk_div_ops;
#define GATE_DIV(_id, _name, _parent, _gate_reg, _gate_shift, _div_reg, \
_div_shift, _div_width, _div_initval, _table, \
_flags) { \
.id = _id, \
.parent = _parent, \
.name = _name, \
.gate_reg = _gate_reg, \
.gate_shift = _gate_shift, \
.div_reg = _div_reg, \
.div_shift = _div_shift, \
.div_width = _div_width, \
.div_initval = _div_initval, \
.table = _table, \
.mux_shift = -1, \
.flags = _flags, \
}
#define GATE_MUX(_id, _name, _parents, _gate_reg, _gate_shift, \
_mux_reg, _mux_shift, _flags) { \
.id = _id, \
.parents = _parents, \
.num_parents = ARRAY_SIZE(_parents), \
.name = _name, \
.gate_reg = _gate_reg, \
.gate_shift = _gate_shift, \
.div_shift = -1, \
.mux_reg = _mux_reg, \
.mux_shift = _mux_shift, \
.flags = _flags, \
}
#define CLK_PLL(_id, _name, _parent, _reg, _flags) { \
.pll.id = _id, \
.pll.name = _name, \
.pll.reg = _reg, \
.hw.init = CLK_HW_INIT_PARENTS_DATA(_name, _parent, \
&bm1880_pll_ops, \
_flags), \
}
#define CLK_DIV(_id, _name, _parent, _reg, _shift, _width, _initval, \
_table, _flags) { \
.div.id = _id, \
.div.name = _name, \
.div.reg = _reg, \
.div.shift = _shift, \
.div.width = _width, \
.div.initval = _initval, \
.div.table = _table, \
.hw.init = CLK_HW_INIT_HW(_name, _parent, \
&bm1880_clk_div_ops, \
_flags), \
}
static struct clk_parent_data bm1880_pll_parent[] = {
{ .fw_name = "osc", .name = "osc" },
};
/*
* All PLL clocks are marked as CRITICAL, hence they are very crucial
* for the functioning of the SoC
*/
static struct bm1880_pll_hw_clock bm1880_pll_clks[] = {
CLK_PLL(BM1880_CLK_MPLL, "clk_mpll", bm1880_pll_parent,
BM1880_CLK_MPLL_CTL, 0),
CLK_PLL(BM1880_CLK_SPLL, "clk_spll", bm1880_pll_parent,
BM1880_CLK_SPLL_CTL, 0),
CLK_PLL(BM1880_CLK_FPLL, "clk_fpll", bm1880_pll_parent,
BM1880_CLK_FPLL_CTL, 0),
CLK_PLL(BM1880_CLK_DDRPLL, "clk_ddrpll", bm1880_pll_parent,
BM1880_CLK_DDRPLL_CTL, 0),
};
/*
* Clocks marked as CRITICAL are needed for the proper functioning
* of the SoC.
*/
static const struct bm1880_gate_clock bm1880_gate_clks[] = {
{ BM1880_CLK_AHB_ROM, "clk_ahb_rom", "clk_mux_axi6",
BM1880_CLK_ENABLE0, 2, 0 },
{ BM1880_CLK_AXI_SRAM, "clk_axi_sram", "clk_axi1",
BM1880_CLK_ENABLE0, 3, 0 },
/*
* Since this clock is sourcing the DDR memory, let's mark it as
* critical to avoid gating.
*/
{ BM1880_CLK_DDR_AXI, "clk_ddr_axi", "clk_mux_axi6",
BM1880_CLK_ENABLE0, 4, CLK_IS_CRITICAL },
{ BM1880_CLK_APB_EFUSE, "clk_apb_efuse", "clk_mux_axi6",
BM1880_CLK_ENABLE0, 6, 0 },
{ BM1880_CLK_AXI5_EMMC, "clk_axi5_emmc", "clk_axi5",
BM1880_CLK_ENABLE0, 7, 0 },
{ BM1880_CLK_AXI5_SD, "clk_axi5_sd", "clk_axi5",
BM1880_CLK_ENABLE0, 10, 0 },
{ BM1880_CLK_AXI4_ETH0, "clk_axi4_eth0", "clk_axi4",
BM1880_CLK_ENABLE0, 14, 0 },
{ BM1880_CLK_AXI4_ETH1, "clk_axi4_eth1", "clk_axi4",
BM1880_CLK_ENABLE0, 16, 0 },
{ BM1880_CLK_AXI1_GDMA, "clk_axi1_gdma", "clk_axi1",
BM1880_CLK_ENABLE0, 17, 0 },
/* Don't gate GPIO clocks as it is not owned by the GPIO driver */
{ BM1880_CLK_APB_GPIO, "clk_apb_gpio", "clk_mux_axi6",
BM1880_CLK_ENABLE0, 18, CLK_IGNORE_UNUSED },
{ BM1880_CLK_APB_GPIO_INTR, "clk_apb_gpio_intr", "clk_mux_axi6",
BM1880_CLK_ENABLE0, 19, CLK_IGNORE_UNUSED },
{ BM1880_CLK_AXI1_MINER, "clk_axi1_miner", "clk_axi1",
BM1880_CLK_ENABLE0, 21, 0 },
{ BM1880_CLK_AHB_SF, "clk_ahb_sf", "clk_mux_axi6",
BM1880_CLK_ENABLE0, 22, 0 },
/*
* Not sure which module this clock is sourcing but gating this clock
* prevents the system from booting. So, let's mark it as critical.
*/
{ BM1880_CLK_SDMA_AXI, "clk_sdma_axi", "clk_axi5",
BM1880_CLK_ENABLE0, 23, CLK_IS_CRITICAL },
{ BM1880_CLK_APB_I2C, "clk_apb_i2c", "clk_mux_axi6",
BM1880_CLK_ENABLE0, 25, 0 },
{ BM1880_CLK_APB_WDT, "clk_apb_wdt", "clk_mux_axi6",
BM1880_CLK_ENABLE0, 26, 0 },
{ BM1880_CLK_APB_JPEG, "clk_apb_jpeg", "clk_axi6",
BM1880_CLK_ENABLE0, 27, 0 },
{ BM1880_CLK_AXI5_NF, "clk_axi5_nf", "clk_axi5",
BM1880_CLK_ENABLE0, 29, 0 },
{ BM1880_CLK_APB_NF, "clk_apb_nf", "clk_axi6",
BM1880_CLK_ENABLE0, 30, 0 },
{ BM1880_CLK_APB_PWM, "clk_apb_pwm", "clk_mux_axi6",
BM1880_CLK_ENABLE1, 0, 0 },
{ BM1880_CLK_RV, "clk_rv", "clk_mux_rv",
BM1880_CLK_ENABLE1, 1, 0 },
{ BM1880_CLK_APB_SPI, "clk_apb_spi", "clk_mux_axi6",
BM1880_CLK_ENABLE1, 2, 0 },
{ BM1880_CLK_UART_500M, "clk_uart_500m", "clk_div_uart_500m",
BM1880_CLK_ENABLE1, 4, 0 },
{ BM1880_CLK_APB_UART, "clk_apb_uart", "clk_axi6",
BM1880_CLK_ENABLE1, 5, 0 },
{ BM1880_CLK_APB_I2S, "clk_apb_i2s", "clk_axi6",
BM1880_CLK_ENABLE1, 6, 0 },
{ BM1880_CLK_AXI4_USB, "clk_axi4_usb", "clk_axi4",
BM1880_CLK_ENABLE1, 7, 0 },
{ BM1880_CLK_APB_USB, "clk_apb_usb", "clk_axi6",
BM1880_CLK_ENABLE1, 8, 0 },
{ BM1880_CLK_12M_USB, "clk_12m_usb", "clk_div_12m_usb",
BM1880_CLK_ENABLE1, 11, 0 },
{ BM1880_CLK_APB_VIDEO, "clk_apb_video", "clk_axi6",
BM1880_CLK_ENABLE1, 12, 0 },
{ BM1880_CLK_APB_VPP, "clk_apb_vpp", "clk_axi6",
BM1880_CLK_ENABLE1, 15, 0 },
{ BM1880_CLK_AXI6, "clk_axi6", "clk_mux_axi6",
BM1880_CLK_ENABLE1, 21, 0 },
};
static const char * const clk_a53_parents[] = { "clk_spll", "clk_mpll" };
static const char * const clk_rv_parents[] = { "clk_div_1_rv", "clk_div_0_rv" };
static const char * const clk_axi1_parents[] = { "clk_div_1_axi1", "clk_div_0_axi1" };
static const char * const clk_axi6_parents[] = { "clk_div_1_axi6", "clk_div_0_axi6" };
static const struct bm1880_mux_clock bm1880_mux_clks[] = {
{ BM1880_CLK_MUX_RV, "clk_mux_rv", clk_rv_parents, 2,
BM1880_CLK_SELECT, 1, 0 },
{ BM1880_CLK_MUX_AXI6, "clk_mux_axi6", clk_axi6_parents, 2,
BM1880_CLK_SELECT, 3, 0 },
};
static const struct clk_div_table bm1880_div_table_0[] = {
{ 0, 1 }, { 1, 2 }, { 2, 3 }, { 3, 4 },
{ 4, 5 }, { 5, 6 }, { 6, 7 }, { 7, 8 },
{ 8, 9 }, { 9, 10 }, { 10, 11 }, { 11, 12 },
{ 12, 13 }, { 13, 14 }, { 14, 15 }, { 15, 16 },
{ 16, 17 }, { 17, 18 }, { 18, 19 }, { 19, 20 },
{ 20, 21 }, { 21, 22 }, { 22, 23 }, { 23, 24 },
{ 24, 25 }, { 25, 26 }, { 26, 27 }, { 27, 28 },
{ 28, 29 }, { 29, 30 }, { 30, 31 }, { 31, 32 },
{ 0, 0 }
};
static const struct clk_div_table bm1880_div_table_1[] = {
{ 0, 1 }, { 1, 2 }, { 2, 3 }, { 3, 4 },
{ 4, 5 }, { 5, 6 }, { 6, 7 }, { 7, 8 },
{ 8, 9 }, { 9, 10 }, { 10, 11 }, { 11, 12 },
{ 12, 13 }, { 13, 14 }, { 14, 15 }, { 15, 16 },
{ 16, 17 }, { 17, 18 }, { 18, 19 }, { 19, 20 },
{ 20, 21 }, { 21, 22 }, { 22, 23 }, { 23, 24 },
{ 24, 25 }, { 25, 26 }, { 26, 27 }, { 27, 28 },
{ 28, 29 }, { 29, 30 }, { 30, 31 }, { 31, 32 },
{ 127, 128 }, { 0, 0 }
};
static const struct clk_div_table bm1880_div_table_2[] = {
{ 0, 1 }, { 1, 2 }, { 2, 3 }, { 3, 4 },
{ 4, 5 }, { 5, 6 }, { 6, 7 }, { 7, 8 },
{ 8, 9 }, { 9, 10 }, { 10, 11 }, { 11, 12 },
{ 12, 13 }, { 13, 14 }, { 14, 15 }, { 15, 16 },
{ 16, 17 }, { 17, 18 }, { 18, 19 }, { 19, 20 },
{ 20, 21 }, { 21, 22 }, { 22, 23 }, { 23, 24 },
{ 24, 25 }, { 25, 26 }, { 26, 27 }, { 27, 28 },
{ 28, 29 }, { 29, 30 }, { 30, 31 }, { 31, 32 },
{ 127, 128 }, { 255, 256 }, { 0, 0 }
};
static const struct clk_div_table bm1880_div_table_3[] = {
{ 0, 1 }, { 1, 2 }, { 2, 3 }, { 3, 4 },
{ 4, 5 }, { 5, 6 }, { 6, 7 }, { 7, 8 },
{ 8, 9 }, { 9, 10 }, { 10, 11 }, { 11, 12 },
{ 12, 13 }, { 13, 14 }, { 14, 15 }, { 15, 16 },
{ 16, 17 }, { 17, 18 }, { 18, 19 }, { 19, 20 },
{ 20, 21 }, { 21, 22 }, { 22, 23 }, { 23, 24 },
{ 24, 25 }, { 25, 26 }, { 26, 27 }, { 27, 28 },
{ 28, 29 }, { 29, 30 }, { 30, 31 }, { 31, 32 },
{ 127, 128 }, { 255, 256 }, { 511, 512 }, { 0, 0 }
};
static const struct clk_div_table bm1880_div_table_4[] = {
{ 0, 1 }, { 1, 2 }, { 2, 3 }, { 3, 4 },
{ 4, 5 }, { 5, 6 }, { 6, 7 }, { 7, 8 },
{ 8, 9 }, { 9, 10 }, { 10, 11 }, { 11, 12 },
{ 12, 13 }, { 13, 14 }, { 14, 15 }, { 15, 16 },
{ 16, 17 }, { 17, 18 }, { 18, 19 }, { 19, 20 },
{ 20, 21 }, { 21, 22 }, { 22, 23 }, { 23, 24 },
{ 24, 25 }, { 25, 26 }, { 26, 27 }, { 27, 28 },
{ 28, 29 }, { 29, 30 }, { 30, 31 }, { 31, 32 },
{ 127, 128 }, { 255, 256 }, { 511, 512 }, { 65535, 65536 },
{ 0, 0 }
};
/*
* Clocks marked as CRITICAL are needed for the proper functioning
* of the SoC.
*/
static struct bm1880_div_hw_clock bm1880_div_clks[] = {
CLK_DIV(BM1880_CLK_DIV_0_RV, "clk_div_0_rv", &bm1880_pll_clks[1].hw,
BM1880_CLK_DIV12, 16, 5, 1, bm1880_div_table_0, 0),
CLK_DIV(BM1880_CLK_DIV_1_RV, "clk_div_1_rv", &bm1880_pll_clks[2].hw,
BM1880_CLK_DIV13, 16, 5, 1, bm1880_div_table_0, 0),
CLK_DIV(BM1880_CLK_DIV_UART_500M, "clk_div_uart_500m", &bm1880_pll_clks[2].hw,
BM1880_CLK_DIV15, 16, 7, 3, bm1880_div_table_1, 0),
CLK_DIV(BM1880_CLK_DIV_0_AXI1, "clk_div_0_axi1", &bm1880_pll_clks[0].hw,
BM1880_CLK_DIV21, 16, 5, 2, bm1880_div_table_0,
0),
CLK_DIV(BM1880_CLK_DIV_1_AXI1, "clk_div_1_axi1", &bm1880_pll_clks[2].hw,
BM1880_CLK_DIV22, 16, 5, 3, bm1880_div_table_0,
0),
CLK_DIV(BM1880_CLK_DIV_0_AXI6, "clk_div_0_axi6", &bm1880_pll_clks[2].hw,
BM1880_CLK_DIV27, 16, 5, 15, bm1880_div_table_0,
0),
CLK_DIV(BM1880_CLK_DIV_1_AXI6, "clk_div_1_axi6", &bm1880_pll_clks[0].hw,
BM1880_CLK_DIV28, 16, 5, 11, bm1880_div_table_0,
0),
CLK_DIV(BM1880_CLK_DIV_12M_USB, "clk_div_12m_usb", &bm1880_pll_clks[2].hw,
BM1880_CLK_DIV18, 16, 7, 125, bm1880_div_table_1, 0),
};
/*
* Clocks marked as CRITICAL are all needed for the proper functioning
* of the SoC.
*/
static struct bm1880_composite_clock bm1880_composite_clks[] = {
/*
* Since clk_a53 and clk_50m_a53 clocks are sourcing the CPU core,
* let's mark them as critical to avoid gating.
*/
GATE_MUX(BM1880_CLK_A53, "clk_a53", clk_a53_parents,
BM1880_CLK_ENABLE0, 0, BM1880_CLK_SELECT, 0,
CLK_IS_CRITICAL),
GATE_DIV(BM1880_CLK_50M_A53, "clk_50m_a53", "clk_fpll",
BM1880_CLK_ENABLE0, 1, BM1880_CLK_DIV0, 16, 5, 30,
bm1880_div_table_0, CLK_IS_CRITICAL),
GATE_DIV(BM1880_CLK_EFUSE, "clk_efuse", "clk_fpll",
BM1880_CLK_ENABLE0, 5, BM1880_CLK_DIV1, 16, 7, 60,
bm1880_div_table_1, 0),
GATE_DIV(BM1880_CLK_EMMC, "clk_emmc", "clk_fpll",
BM1880_CLK_ENABLE0, 8, BM1880_CLK_DIV2, 16, 5, 15,
bm1880_div_table_0, 0),
GATE_DIV(BM1880_CLK_100K_EMMC, "clk_100k_emmc", "clk_div_12m_usb",
BM1880_CLK_ENABLE0, 9, BM1880_CLK_DIV3, 16, 8, 120,
bm1880_div_table_2, 0),
GATE_DIV(BM1880_CLK_SD, "clk_sd", "clk_fpll",
BM1880_CLK_ENABLE0, 11, BM1880_CLK_DIV4, 16, 5, 15,
bm1880_div_table_0, 0),
GATE_DIV(BM1880_CLK_100K_SD, "clk_100k_sd", "clk_div_12m_usb",
BM1880_CLK_ENABLE0, 12, BM1880_CLK_DIV5, 16, 8, 120,
bm1880_div_table_2, 0),
GATE_DIV(BM1880_CLK_500M_ETH0, "clk_500m_eth0", "clk_fpll",
BM1880_CLK_ENABLE0, 13, BM1880_CLK_DIV6, 16, 5, 3,
bm1880_div_table_0, 0),
GATE_DIV(BM1880_CLK_500M_ETH1, "clk_500m_eth1", "clk_fpll",
BM1880_CLK_ENABLE0, 15, BM1880_CLK_DIV7, 16, 5, 3,
bm1880_div_table_0, 0),
/* Don't gate GPIO clocks as it is not owned by the GPIO driver */
GATE_DIV(BM1880_CLK_GPIO_DB, "clk_gpio_db", "clk_div_12m_usb",
BM1880_CLK_ENABLE0, 20, BM1880_CLK_DIV8, 16, 16, 120,
bm1880_div_table_4, CLK_IGNORE_UNUSED),
GATE_DIV(BM1880_CLK_SDMA_AUD, "clk_sdma_aud", "clk_fpll",
BM1880_CLK_ENABLE0, 24, BM1880_CLK_DIV9, 16, 7, 61,
bm1880_div_table_1, 0),
GATE_DIV(BM1880_CLK_JPEG_AXI, "clk_jpeg_axi", "clk_fpll",
BM1880_CLK_ENABLE0, 28, BM1880_CLK_DIV10, 16, 5, 4,
bm1880_div_table_0, 0),
GATE_DIV(BM1880_CLK_NF, "clk_nf", "clk_fpll",
BM1880_CLK_ENABLE0, 31, BM1880_CLK_DIV11, 16, 5, 30,
bm1880_div_table_0, 0),
GATE_DIV(BM1880_CLK_TPU_AXI, "clk_tpu_axi", "clk_spll",
BM1880_CLK_ENABLE1, 3, BM1880_CLK_DIV14, 16, 5, 1,
bm1880_div_table_0, 0),
GATE_DIV(BM1880_CLK_125M_USB, "clk_125m_usb", "clk_fpll",
BM1880_CLK_ENABLE1, 9, BM1880_CLK_DIV16, 16, 5, 12,
bm1880_div_table_0, 0),
GATE_DIV(BM1880_CLK_33K_USB, "clk_33k_usb", "clk_div_12m_usb",
BM1880_CLK_ENABLE1, 10, BM1880_CLK_DIV17, 16, 9, 363,
bm1880_div_table_3, 0),
GATE_DIV(BM1880_CLK_VIDEO_AXI, "clk_video_axi", "clk_fpll",
BM1880_CLK_ENABLE1, 13, BM1880_CLK_DIV19, 16, 5, 4,
bm1880_div_table_0, 0),
GATE_DIV(BM1880_CLK_VPP_AXI, "clk_vpp_axi", "clk_fpll",
BM1880_CLK_ENABLE1, 14, BM1880_CLK_DIV20, 16, 5, 4,
bm1880_div_table_0, 0),
GATE_MUX(BM1880_CLK_AXI1, "clk_axi1", clk_axi1_parents,
BM1880_CLK_ENABLE1, 15, BM1880_CLK_SELECT, 2, 0),
GATE_DIV(BM1880_CLK_AXI2, "clk_axi2", "clk_fpll",
BM1880_CLK_ENABLE1, 17, BM1880_CLK_DIV23, 16, 5, 3,
bm1880_div_table_0, 0),
GATE_DIV(BM1880_CLK_AXI3, "clk_axi3", "clk_mux_rv",
BM1880_CLK_ENABLE1, 18, BM1880_CLK_DIV24, 16, 5, 2,
bm1880_div_table_0, 0),
GATE_DIV(BM1880_CLK_AXI4, "clk_axi4", "clk_fpll",
BM1880_CLK_ENABLE1, 19, BM1880_CLK_DIV25, 16, 5, 6,
bm1880_div_table_0, 0),
GATE_DIV(BM1880_CLK_AXI5, "clk_axi5", "clk_fpll",
BM1880_CLK_ENABLE1, 20, BM1880_CLK_DIV26, 16, 5, 15,
bm1880_div_table_0, 0),
};
static unsigned long bm1880_pll_rate_calc(u32 regval, unsigned long parent_rate)
{
u64 numerator;
u32 fbdiv, refdiv;
u32 postdiv1, postdiv2, denominator;
fbdiv = (regval >> 16) & 0xfff;
refdiv = regval & 0x1f;
postdiv1 = (regval >> 8) & 0x7;
postdiv2 = (regval >> 12) & 0x7;
numerator = parent_rate * fbdiv;
denominator = refdiv * postdiv1 * postdiv2;
do_div(numerator, denominator);
return (unsigned long)numerator;
}
static unsigned long bm1880_pll_recalc_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
struct bm1880_pll_hw_clock *pll_hw = to_bm1880_pll_clk(hw);
unsigned long rate;
u32 regval;
regval = readl(pll_hw->base + pll_hw->pll.reg);
rate = bm1880_pll_rate_calc(regval, parent_rate);
return rate;
}
static const struct clk_ops bm1880_pll_ops = {
.recalc_rate = bm1880_pll_recalc_rate,
};
static struct clk_hw *bm1880_clk_register_pll(struct bm1880_pll_hw_clock *pll_clk,
void __iomem *sys_base)
{
struct clk_hw *hw;
int err;
pll_clk->base = sys_base;
hw = &pll_clk->hw;
err = clk_hw_register(NULL, hw);
if (err)
return ERR_PTR(err);
return hw;
}
static void bm1880_clk_unregister_pll(struct clk_hw *hw)
{
struct bm1880_pll_hw_clock *pll_hw = to_bm1880_pll_clk(hw);
clk_hw_unregister(hw);
kfree(pll_hw);
}
static int bm1880_clk_register_plls(struct bm1880_pll_hw_clock *clks,
int num_clks,
struct bm1880_clock_data *data)
{
struct clk_hw *hw;
void __iomem *pll_base = data->pll_base;
int i;
for (i = 0; i < num_clks; i++) {
struct bm1880_pll_hw_clock *bm1880_clk = &clks[i];
hw = bm1880_clk_register_pll(bm1880_clk, pll_base);
if (IS_ERR(hw)) {
pr_err("%s: failed to register clock %s\n",
__func__, bm1880_clk->pll.name);
goto err_clk;
}
data->hw_data.hws[clks[i].pll.id] = hw;
}
return 0;
err_clk:
while (i--)
bm1880_clk_unregister_pll(data->hw_data.hws[clks[i].pll.id]);
return PTR_ERR(hw);
}
static int bm1880_clk_register_mux(const struct bm1880_mux_clock *clks,
int num_clks,
struct bm1880_clock_data *data)
{
struct clk_hw *hw;
void __iomem *sys_base = data->sys_base;
int i;
for (i = 0; i < num_clks; i++) {
hw = clk_hw_register_mux(NULL, clks[i].name,
clks[i].parents,
clks[i].num_parents,
clks[i].flags,
sys_base + clks[i].reg,
clks[i].shift, 1, 0,
&bm1880_clk_lock);
if (IS_ERR(hw)) {
pr_err("%s: failed to register clock %s\n",
__func__, clks[i].name);
goto err_clk;
}
data->hw_data.hws[clks[i].id] = hw;
}
return 0;
err_clk:
while (i--)
clk_hw_unregister_mux(data->hw_data.hws[clks[i].id]);
return PTR_ERR(hw);
}
static unsigned long bm1880_clk_div_recalc_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
struct bm1880_div_hw_clock *div_hw = to_bm1880_div_clk(hw);
struct bm1880_div_clock *div = &div_hw->div;
void __iomem *reg_addr = div_hw->base + div->reg;
unsigned int val;
unsigned long rate;
if (!(readl(reg_addr) & BIT(3))) {
val = div->initval;
} else {
val = readl(reg_addr) >> div->shift;
val &= clk_div_mask(div->width);
}
rate = divider_recalc_rate(hw, parent_rate, val, div->table,
div->flags, div->width);
return rate;
}
static long bm1880_clk_div_round_rate(struct clk_hw *hw, unsigned long rate,
unsigned long *prate)
{
struct bm1880_div_hw_clock *div_hw = to_bm1880_div_clk(hw);
struct bm1880_div_clock *div = &div_hw->div;
void __iomem *reg_addr = div_hw->base + div->reg;
if (div->flags & CLK_DIVIDER_READ_ONLY) {
u32 val;
val = readl(reg_addr) >> div->shift;
val &= clk_div_mask(div->width);
return divider_ro_round_rate(hw, rate, prate, div->table,
div->width, div->flags,
val);
}
return divider_round_rate(hw, rate, prate, div->table,
div->width, div->flags);
}
static int bm1880_clk_div_set_rate(struct clk_hw *hw, unsigned long rate,
unsigned long parent_rate)
{
struct bm1880_div_hw_clock *div_hw = to_bm1880_div_clk(hw);
struct bm1880_div_clock *div = &div_hw->div;
void __iomem *reg_addr = div_hw->base + div->reg;
unsigned long flags = 0;
int value;
u32 val;
value = divider_get_val(rate, parent_rate, div->table,
div->width, div_hw->div.flags);
if (value < 0)
return value;
if (div_hw->lock)
spin_lock_irqsave(div_hw->lock, flags);
else
__acquire(div_hw->lock);
val = readl(reg_addr);
val &= ~(clk_div_mask(div->width) << div_hw->div.shift);
val |= (u32)value << div->shift;
writel(val, reg_addr);
if (div_hw->lock)
spin_unlock_irqrestore(div_hw->lock, flags);
else
__release(div_hw->lock);
return 0;
}
static const struct clk_ops bm1880_clk_div_ops = {
.recalc_rate = bm1880_clk_div_recalc_rate,
.round_rate = bm1880_clk_div_round_rate,
.set_rate = bm1880_clk_div_set_rate,
};
static struct clk_hw *bm1880_clk_register_div(struct bm1880_div_hw_clock *div_clk,
void __iomem *sys_base)
{
struct clk_hw *hw;
int err;
div_clk->div.flags = CLK_DIVIDER_ONE_BASED | CLK_DIVIDER_ALLOW_ZERO;
div_clk->base = sys_base;
div_clk->lock = &bm1880_clk_lock;
hw = &div_clk->hw;
err = clk_hw_register(NULL, hw);
if (err)
return ERR_PTR(err);
return hw;
}
static void bm1880_clk_unregister_div(struct clk_hw *hw)
{
struct bm1880_div_hw_clock *div_hw = to_bm1880_div_clk(hw);
clk_hw_unregister(hw);
kfree(div_hw);
}
static int bm1880_clk_register_divs(struct bm1880_div_hw_clock *clks,
int num_clks,
struct bm1880_clock_data *data)
{
struct clk_hw *hw;
void __iomem *sys_base = data->sys_base;
unsigned int i, id;
for (i = 0; i < num_clks; i++) {
struct bm1880_div_hw_clock *bm1880_clk = &clks[i];
hw = bm1880_clk_register_div(bm1880_clk, sys_base);
if (IS_ERR(hw)) {
pr_err("%s: failed to register clock %s\n",
__func__, bm1880_clk->div.name);
goto err_clk;
}
id = clks[i].div.id;
data->hw_data.hws[id] = hw;
}
return 0;
err_clk:
while (i--)
bm1880_clk_unregister_div(data->hw_data.hws[clks[i].div.id]);
return PTR_ERR(hw);
}
static int bm1880_clk_register_gate(const struct bm1880_gate_clock *clks,
int num_clks,
struct bm1880_clock_data *data)
{
struct clk_hw *hw;
void __iomem *sys_base = data->sys_base;
int i;
for (i = 0; i < num_clks; i++) {
hw = clk_hw_register_gate(NULL, clks[i].name,
clks[i].parent,
clks[i].flags,
sys_base + clks[i].gate_reg,
clks[i].gate_shift, 0,
&bm1880_clk_lock);
if (IS_ERR(hw)) {
pr_err("%s: failed to register clock %s\n",
__func__, clks[i].name);
goto err_clk;
}
data->hw_data.hws[clks[i].id] = hw;
}
return 0;
err_clk:
while (i--)
clk_hw_unregister_gate(data->hw_data.hws[clks[i].id]);
return PTR_ERR(hw);
}
static struct clk_hw *bm1880_clk_register_composite(struct bm1880_composite_clock *clks,
void __iomem *sys_base)
{
struct clk_hw *hw;
struct clk_mux *mux = NULL;
struct clk_gate *gate = NULL;
struct bm1880_div_hw_clock *div_hws = NULL;
struct clk_hw *mux_hw = NULL, *gate_hw = NULL, *div_hw = NULL;
const struct clk_ops *mux_ops = NULL, *gate_ops = NULL, *div_ops = NULL;
const char * const *parent_names;
const char *parent;
int num_parents;
int ret;
if (clks->mux_shift >= 0) {
mux = kzalloc(sizeof(*mux), GFP_KERNEL);
if (!mux)
return ERR_PTR(-ENOMEM);
mux->reg = sys_base + clks->mux_reg;
mux->mask = 1;
mux->shift = clks->mux_shift;
mux_hw = &mux->hw;
mux_ops = &clk_mux_ops;
mux->lock = &bm1880_clk_lock;
parent_names = clks->parents;
num_parents = clks->num_parents;
} else {
parent = clks->parent;
parent_names = &parent;
num_parents = 1;
}
if (clks->gate_shift >= 0) {
gate = kzalloc(sizeof(*gate), GFP_KERNEL);
if (!gate) {
ret = -ENOMEM;
goto err_out;
}
gate->reg = sys_base + clks->gate_reg;
gate->bit_idx = clks->gate_shift;
gate->lock = &bm1880_clk_lock;
gate_hw = &gate->hw;
gate_ops = &clk_gate_ops;
}
if (clks->div_shift >= 0) {
div_hws = kzalloc(sizeof(*div_hws), GFP_KERNEL);
if (!div_hws) {
ret = -ENOMEM;
goto err_out;
}
div_hws->base = sys_base;
div_hws->div.reg = clks->div_reg;
div_hws->div.shift = clks->div_shift;
div_hws->div.width = clks->div_width;
div_hws->div.table = clks->table;
div_hws->div.initval = clks->div_initval;
div_hws->lock = &bm1880_clk_lock;
div_hws->div.flags = CLK_DIVIDER_ONE_BASED |
CLK_DIVIDER_ALLOW_ZERO;
div_hw = &div_hws->hw;
div_ops = &bm1880_clk_div_ops;
}
hw = clk_hw_register_composite(NULL, clks->name, parent_names,
num_parents, mux_hw, mux_ops, div_hw,
div_ops, gate_hw, gate_ops,
clks->flags);
if (IS_ERR(hw)) {
ret = PTR_ERR(hw);
goto err_out;
}
return hw;
err_out:
kfree(div_hws);
kfree(gate);
kfree(mux);
return ERR_PTR(ret);
}
static int bm1880_clk_register_composites(struct bm1880_composite_clock *clks,
int num_clks,
struct bm1880_clock_data *data)
{
struct clk_hw *hw;
void __iomem *sys_base = data->sys_base;
int i;
for (i = 0; i < num_clks; i++) {
struct bm1880_composite_clock *bm1880_clk = &clks[i];
hw = bm1880_clk_register_composite(bm1880_clk, sys_base);
if (IS_ERR(hw)) {
pr_err("%s: failed to register clock %s\n",
__func__, bm1880_clk->name);
goto err_clk;
}
data->hw_data.hws[clks[i].id] = hw;
}
return 0;
err_clk:
while (i--)
clk_hw_unregister_composite(data->hw_data.hws[clks[i].id]);
return PTR_ERR(hw);
}
static int bm1880_clk_probe(struct platform_device *pdev)
{
struct bm1880_clock_data *clk_data;
void __iomem *pll_base, *sys_base;
struct device *dev = &pdev->dev;
struct resource *res;
int num_clks, i;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
pll_base = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(pll_base))
return PTR_ERR(pll_base);
res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
sys_base = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(sys_base))
return PTR_ERR(sys_base);
num_clks = ARRAY_SIZE(bm1880_pll_clks) +
ARRAY_SIZE(bm1880_div_clks) +
ARRAY_SIZE(bm1880_mux_clks) +
ARRAY_SIZE(bm1880_composite_clks) +
ARRAY_SIZE(bm1880_gate_clks);
clk_data = devm_kzalloc(dev, struct_size(clk_data, hw_data.hws,
num_clks), GFP_KERNEL);
if (!clk_data)
return -ENOMEM;
clk_data->pll_base = pll_base;
clk_data->sys_base = sys_base;
for (i = 0; i < num_clks; i++)
clk_data->hw_data.hws[i] = ERR_PTR(-ENOENT);
clk_data->hw_data.num = num_clks;
bm1880_clk_register_plls(bm1880_pll_clks,
ARRAY_SIZE(bm1880_pll_clks),
clk_data);
bm1880_clk_register_divs(bm1880_div_clks,
ARRAY_SIZE(bm1880_div_clks),
clk_data);
bm1880_clk_register_mux(bm1880_mux_clks,
ARRAY_SIZE(bm1880_mux_clks),
clk_data);
bm1880_clk_register_composites(bm1880_composite_clks,
ARRAY_SIZE(bm1880_composite_clks),
clk_data);
bm1880_clk_register_gate(bm1880_gate_clks,
ARRAY_SIZE(bm1880_gate_clks),
clk_data);
return devm_of_clk_add_hw_provider(dev, of_clk_hw_onecell_get,
&clk_data->hw_data);
}
static const struct of_device_id bm1880_of_match[] = {
{ .compatible = "bitmain,bm1880-clk", },
{}
};
MODULE_DEVICE_TABLE(of, bm1880_of_match);
static struct platform_driver bm1880_clk_driver = {
.driver = {
.name = "bm1880-clk",
.of_match_table = bm1880_of_match,
},
.probe = bm1880_clk_probe,
};
module_platform_driver(bm1880_clk_driver);
MODULE_AUTHOR("Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>");
MODULE_DESCRIPTION("Clock driver for Bitmain BM1880 SoC");
MODULE_LICENSE("GPL v2");
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