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Code
a6dacf6ad4
linux-next/drivers/clk/clk-stm32f4.c
Gabriel Fernandez ac03d8b3a5 clk: stm32f4: fix timeout management for pll and ready gate 
Use a classic polling to test bit ready.
And the shift of the bit ready of LSE & LSI were wrongs.

Fixes: 861adc44d2 ("clk: stm32f4: Add LSI & LSE clocks")
Signed-off-by: Gabriel Fernandez <gabriel.fernandez@st.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Michael Turquette <mturquette@baylibre.com>
2017-04-12 18:50:56 +02:00

1619 lines
43 KiB
C
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/*
* Author: Daniel Thompson <daniel.thompson@linaro.org>
*
* Inspired by clk-asm9260.c .
*
* 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/clk-provider.h>
#include <linux/err.h>
#include <linux/io.h>
#include <linux/iopoll.h>
#include <linux/ioport.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/regmap.h>
#include <linux/mfd/syscon.h>
/*
* Include list of clocks wich are not derived from system clock (SYSCLOCK)
* The index of these clocks is the secondary index of DT bindings
*
*/
#include <dt-bindings/clock/stm32fx-clock.h>
#define STM32F4_RCC_CR 0x00
#define STM32F4_RCC_PLLCFGR 0x04
#define STM32F4_RCC_CFGR 0x08
#define STM32F4_RCC_AHB1ENR 0x30
#define STM32F4_RCC_AHB2ENR 0x34
#define STM32F4_RCC_AHB3ENR 0x38
#define STM32F4_RCC_APB1ENR 0x40
#define STM32F4_RCC_APB2ENR 0x44
#define STM32F4_RCC_BDCR 0x70
#define STM32F4_RCC_CSR 0x74
#define STM32F4_RCC_PLLI2SCFGR 0x84
#define STM32F4_RCC_PLLSAICFGR 0x88
#define STM32F4_RCC_DCKCFGR 0x8c
#define STM32F7_RCC_DCKCFGR2 0x90
#define NONE -1
#define NO_IDX NONE
#define NO_MUX NONE
#define NO_GATE NONE
struct stm32f4_gate_data {
u8 offset;
u8 bit_idx;
const char *name;
const char *parent_name;
unsigned long flags;
};
static const struct stm32f4_gate_data stm32f429_gates[] __initconst = {
{ STM32F4_RCC_AHB1ENR, 0, "gpioa", "ahb_div" },
{ STM32F4_RCC_AHB1ENR, 1, "gpiob", "ahb_div" },
{ STM32F4_RCC_AHB1ENR, 2, "gpioc", "ahb_div" },
{ STM32F4_RCC_AHB1ENR, 3, "gpiod", "ahb_div" },
{ STM32F4_RCC_AHB1ENR, 4, "gpioe", "ahb_div" },
{ STM32F4_RCC_AHB1ENR, 5, "gpiof", "ahb_div" },
{ STM32F4_RCC_AHB1ENR, 6, "gpiog", "ahb_div" },
{ STM32F4_RCC_AHB1ENR, 7, "gpioh", "ahb_div" },
{ STM32F4_RCC_AHB1ENR, 8, "gpioi", "ahb_div" },
{ STM32F4_RCC_AHB1ENR, 9, "gpioj", "ahb_div" },
{ STM32F4_RCC_AHB1ENR, 10, "gpiok", "ahb_div" },
{ STM32F4_RCC_AHB1ENR, 12, "crc", "ahb_div" },
{ STM32F4_RCC_AHB1ENR, 18, "bkpsra", "ahb_div" },
{ STM32F4_RCC_AHB1ENR, 20, "ccmdatam", "ahb_div" },
{ STM32F4_RCC_AHB1ENR, 21, "dma1", "ahb_div" },
{ STM32F4_RCC_AHB1ENR, 22, "dma2", "ahb_div" },
{ STM32F4_RCC_AHB1ENR, 23, "dma2d", "ahb_div" },
{ STM32F4_RCC_AHB1ENR, 25, "ethmac", "ahb_div" },
{ STM32F4_RCC_AHB1ENR, 26, "ethmactx", "ahb_div" },
{ STM32F4_RCC_AHB1ENR, 27, "ethmacrx", "ahb_div" },
{ STM32F4_RCC_AHB1ENR, 28, "ethmacptp", "ahb_div" },
{ STM32F4_RCC_AHB1ENR, 29, "otghs", "ahb_div" },
{ STM32F4_RCC_AHB1ENR, 30, "otghsulpi", "ahb_div" },
{ STM32F4_RCC_AHB2ENR, 0, "dcmi", "ahb_div" },
{ STM32F4_RCC_AHB2ENR, 4, "cryp", "ahb_div" },
{ STM32F4_RCC_AHB2ENR, 5, "hash", "ahb_div" },
{ STM32F4_RCC_AHB2ENR, 6, "rng", "pll48" },
{ STM32F4_RCC_AHB2ENR, 7, "otgfs", "pll48" },
{ STM32F4_RCC_AHB3ENR, 0, "fmc", "ahb_div",
CLK_IGNORE_UNUSED },
{ STM32F4_RCC_APB1ENR, 0, "tim2", "apb1_mul" },
{ STM32F4_RCC_APB1ENR, 1, "tim3", "apb1_mul" },
{ STM32F4_RCC_APB1ENR, 2, "tim4", "apb1_mul" },
{ STM32F4_RCC_APB1ENR, 3, "tim5", "apb1_mul" },
{ STM32F4_RCC_APB1ENR, 4, "tim6", "apb1_mul" },
{ STM32F4_RCC_APB1ENR, 5, "tim7", "apb1_mul" },
{ STM32F4_RCC_APB1ENR, 6, "tim12", "apb1_mul" },
{ STM32F4_RCC_APB1ENR, 7, "tim13", "apb1_mul" },
{ STM32F4_RCC_APB1ENR, 8, "tim14", "apb1_mul" },
{ STM32F4_RCC_APB1ENR, 11, "wwdg", "apb1_div" },
{ STM32F4_RCC_APB1ENR, 14, "spi2", "apb1_div" },
{ STM32F4_RCC_APB1ENR, 15, "spi3", "apb1_div" },
{ STM32F4_RCC_APB1ENR, 17, "uart2", "apb1_div" },
{ STM32F4_RCC_APB1ENR, 18, "uart3", "apb1_div" },
{ STM32F4_RCC_APB1ENR, 19, "uart4", "apb1_div" },
{ STM32F4_RCC_APB1ENR, 20, "uart5", "apb1_div" },
{ STM32F4_RCC_APB1ENR, 21, "i2c1", "apb1_div" },
{ STM32F4_RCC_APB1ENR, 22, "i2c2", "apb1_div" },
{ STM32F4_RCC_APB1ENR, 23, "i2c3", "apb1_div" },
{ STM32F4_RCC_APB1ENR, 25, "can1", "apb1_div" },
{ STM32F4_RCC_APB1ENR, 26, "can2", "apb1_div" },
{ STM32F4_RCC_APB1ENR, 28, "pwr", "apb1_div" },
{ STM32F4_RCC_APB1ENR, 29, "dac", "apb1_div" },
{ STM32F4_RCC_APB1ENR, 30, "uart7", "apb1_div" },
{ STM32F4_RCC_APB1ENR, 31, "uart8", "apb1_div" },
{ STM32F4_RCC_APB2ENR, 0, "tim1", "apb2_mul" },
{ STM32F4_RCC_APB2ENR, 1, "tim8", "apb2_mul" },
{ STM32F4_RCC_APB2ENR, 4, "usart1", "apb2_div" },
{ STM32F4_RCC_APB2ENR, 5, "usart6", "apb2_div" },
{ STM32F4_RCC_APB2ENR, 8, "adc1", "apb2_div" },
{ STM32F4_RCC_APB2ENR, 9, "adc2", "apb2_div" },
{ STM32F4_RCC_APB2ENR, 10, "adc3", "apb2_div" },
{ STM32F4_RCC_APB2ENR, 11, "sdio", "pll48" },
{ STM32F4_RCC_APB2ENR, 12, "spi1", "apb2_div" },
{ STM32F4_RCC_APB2ENR, 13, "spi4", "apb2_div" },
{ STM32F4_RCC_APB2ENR, 14, "syscfg", "apb2_div" },
{ STM32F4_RCC_APB2ENR, 16, "tim9", "apb2_mul" },
{ STM32F4_RCC_APB2ENR, 17, "tim10", "apb2_mul" },
{ STM32F4_RCC_APB2ENR, 18, "tim11", "apb2_mul" },
{ STM32F4_RCC_APB2ENR, 20, "spi5", "apb2_div" },
{ STM32F4_RCC_APB2ENR, 21, "spi6", "apb2_div" },
{ STM32F4_RCC_APB2ENR, 22, "sai1", "apb2_div" },
{ STM32F4_RCC_APB2ENR, 26, "ltdc", "apb2_div" },
};
static const struct stm32f4_gate_data stm32f469_gates[] __initconst = {
{ STM32F4_RCC_AHB1ENR, 0, "gpioa", "ahb_div" },
{ STM32F4_RCC_AHB1ENR, 1, "gpiob", "ahb_div" },
{ STM32F4_RCC_AHB1ENR, 2, "gpioc", "ahb_div" },
{ STM32F4_RCC_AHB1ENR, 3, "gpiod", "ahb_div" },
{ STM32F4_RCC_AHB1ENR, 4, "gpioe", "ahb_div" },
{ STM32F4_RCC_AHB1ENR, 5, "gpiof", "ahb_div" },
{ STM32F4_RCC_AHB1ENR, 6, "gpiog", "ahb_div" },
{ STM32F4_RCC_AHB1ENR, 7, "gpioh", "ahb_div" },
{ STM32F4_RCC_AHB1ENR, 8, "gpioi", "ahb_div" },
{ STM32F4_RCC_AHB1ENR, 9, "gpioj", "ahb_div" },
{ STM32F4_RCC_AHB1ENR, 10, "gpiok", "ahb_div" },
{ STM32F4_RCC_AHB1ENR, 12, "crc", "ahb_div" },
{ STM32F4_RCC_AHB1ENR, 18, "bkpsra", "ahb_div" },
{ STM32F4_RCC_AHB1ENR, 20, "ccmdatam", "ahb_div" },
{ STM32F4_RCC_AHB1ENR, 21, "dma1", "ahb_div" },
{ STM32F4_RCC_AHB1ENR, 22, "dma2", "ahb_div" },
{ STM32F4_RCC_AHB1ENR, 23, "dma2d", "ahb_div" },
{ STM32F4_RCC_AHB1ENR, 25, "ethmac", "ahb_div" },
{ STM32F4_RCC_AHB1ENR, 26, "ethmactx", "ahb_div" },
{ STM32F4_RCC_AHB1ENR, 27, "ethmacrx", "ahb_div" },
{ STM32F4_RCC_AHB1ENR, 28, "ethmacptp", "ahb_div" },
{ STM32F4_RCC_AHB1ENR, 29, "otghs", "ahb_div" },
{ STM32F4_RCC_AHB1ENR, 30, "otghsulpi", "ahb_div" },
{ STM32F4_RCC_AHB2ENR, 0, "dcmi", "ahb_div" },
{ STM32F4_RCC_AHB2ENR, 4, "cryp", "ahb_div" },
{ STM32F4_RCC_AHB2ENR, 5, "hash", "ahb_div" },
{ STM32F4_RCC_AHB2ENR, 6, "rng", "pll48" },
{ STM32F4_RCC_AHB2ENR, 7, "otgfs", "pll48" },
{ STM32F4_RCC_AHB3ENR, 0, "fmc", "ahb_div",
CLK_IGNORE_UNUSED },
{ STM32F4_RCC_AHB3ENR, 1, "qspi", "ahb_div",
CLK_IGNORE_UNUSED },
{ STM32F4_RCC_APB1ENR, 0, "tim2", "apb1_mul" },
{ STM32F4_RCC_APB1ENR, 1, "tim3", "apb1_mul" },
{ STM32F4_RCC_APB1ENR, 2, "tim4", "apb1_mul" },
{ STM32F4_RCC_APB1ENR, 3, "tim5", "apb1_mul" },
{ STM32F4_RCC_APB1ENR, 4, "tim6", "apb1_mul" },
{ STM32F4_RCC_APB1ENR, 5, "tim7", "apb1_mul" },
{ STM32F4_RCC_APB1ENR, 6, "tim12", "apb1_mul" },
{ STM32F4_RCC_APB1ENR, 7, "tim13", "apb1_mul" },
{ STM32F4_RCC_APB1ENR, 8, "tim14", "apb1_mul" },
{ STM32F4_RCC_APB1ENR, 11, "wwdg", "apb1_div" },
{ STM32F4_RCC_APB1ENR, 14, "spi2", "apb1_div" },
{ STM32F4_RCC_APB1ENR, 15, "spi3", "apb1_div" },
{ STM32F4_RCC_APB1ENR, 17, "uart2", "apb1_div" },
{ STM32F4_RCC_APB1ENR, 18, "uart3", "apb1_div" },
{ STM32F4_RCC_APB1ENR, 19, "uart4", "apb1_div" },
{ STM32F4_RCC_APB1ENR, 20, "uart5", "apb1_div" },
{ STM32F4_RCC_APB1ENR, 21, "i2c1", "apb1_div" },
{ STM32F4_RCC_APB1ENR, 22, "i2c2", "apb1_div" },
{ STM32F4_RCC_APB1ENR, 23, "i2c3", "apb1_div" },
{ STM32F4_RCC_APB1ENR, 25, "can1", "apb1_div" },
{ STM32F4_RCC_APB1ENR, 26, "can2", "apb1_div" },
{ STM32F4_RCC_APB1ENR, 28, "pwr", "apb1_div" },
{ STM32F4_RCC_APB1ENR, 29, "dac", "apb1_div" },
{ STM32F4_RCC_APB1ENR, 30, "uart7", "apb1_div" },
{ STM32F4_RCC_APB1ENR, 31, "uart8", "apb1_div" },
{ STM32F4_RCC_APB2ENR, 0, "tim1", "apb2_mul" },
{ STM32F4_RCC_APB2ENR, 1, "tim8", "apb2_mul" },
{ STM32F4_RCC_APB2ENR, 4, "usart1", "apb2_div" },
{ STM32F4_RCC_APB2ENR, 5, "usart6", "apb2_div" },
{ STM32F4_RCC_APB2ENR, 8, "adc1", "apb2_div" },
{ STM32F4_RCC_APB2ENR, 9, "adc2", "apb2_div" },
{ STM32F4_RCC_APB2ENR, 10, "adc3", "apb2_div" },
{ STM32F4_RCC_APB2ENR, 11, "sdio", "sdmux" },
{ STM32F4_RCC_APB2ENR, 12, "spi1", "apb2_div" },
{ STM32F4_RCC_APB2ENR, 13, "spi4", "apb2_div" },
{ STM32F4_RCC_APB2ENR, 14, "syscfg", "apb2_div" },
{ STM32F4_RCC_APB2ENR, 16, "tim9", "apb2_mul" },
{ STM32F4_RCC_APB2ENR, 17, "tim10", "apb2_mul" },
{ STM32F4_RCC_APB2ENR, 18, "tim11", "apb2_mul" },
{ STM32F4_RCC_APB2ENR, 20, "spi5", "apb2_div" },
{ STM32F4_RCC_APB2ENR, 21, "spi6", "apb2_div" },
{ STM32F4_RCC_APB2ENR, 22, "sai1", "apb2_div" },
{ STM32F4_RCC_APB2ENR, 26, "ltdc", "apb2_div" },
};
static const struct stm32f4_gate_data stm32f746_gates[] __initconst = {
{ STM32F4_RCC_AHB1ENR, 0, "gpioa", "ahb_div" },
{ STM32F4_RCC_AHB1ENR, 1, "gpiob", "ahb_div" },
{ STM32F4_RCC_AHB1ENR, 2, "gpioc", "ahb_div" },
{ STM32F4_RCC_AHB1ENR, 3, "gpiod", "ahb_div" },
{ STM32F4_RCC_AHB1ENR, 4, "gpioe", "ahb_div" },
{ STM32F4_RCC_AHB1ENR, 5, "gpiof", "ahb_div" },
{ STM32F4_RCC_AHB1ENR, 6, "gpiog", "ahb_div" },
{ STM32F4_RCC_AHB1ENR, 7, "gpioh", "ahb_div" },
{ STM32F4_RCC_AHB1ENR, 8, "gpioi", "ahb_div" },
{ STM32F4_RCC_AHB1ENR, 9, "gpioj", "ahb_div" },
{ STM32F4_RCC_AHB1ENR, 10, "gpiok", "ahb_div" },
{ STM32F4_RCC_AHB1ENR, 12, "crc", "ahb_div" },
{ STM32F4_RCC_AHB1ENR, 18, "bkpsra", "ahb_div" },
{ STM32F4_RCC_AHB1ENR, 20, "dtcmram", "ahb_div" },
{ STM32F4_RCC_AHB1ENR, 21, "dma1", "ahb_div" },
{ STM32F4_RCC_AHB1ENR, 22, "dma2", "ahb_div" },
{ STM32F4_RCC_AHB1ENR, 23, "dma2d", "ahb_div" },
{ STM32F4_RCC_AHB1ENR, 25, "ethmac", "ahb_div" },
{ STM32F4_RCC_AHB1ENR, 26, "ethmactx", "ahb_div" },
{ STM32F4_RCC_AHB1ENR, 27, "ethmacrx", "ahb_div" },
{ STM32F4_RCC_AHB1ENR, 28, "ethmacptp", "ahb_div" },
{ STM32F4_RCC_AHB1ENR, 29, "otghs", "ahb_div" },
{ STM32F4_RCC_AHB1ENR, 30, "otghsulpi", "ahb_div" },
{ STM32F4_RCC_AHB2ENR, 0, "dcmi", "ahb_div" },
{ STM32F4_RCC_AHB2ENR, 4, "cryp", "ahb_div" },
{ STM32F4_RCC_AHB2ENR, 5, "hash", "ahb_div" },
{ STM32F4_RCC_AHB2ENR, 6, "rng", "pll48" },
{ STM32F4_RCC_AHB2ENR, 7, "otgfs", "pll48" },
{ STM32F4_RCC_AHB3ENR, 0, "fmc", "ahb_div",
CLK_IGNORE_UNUSED },
{ STM32F4_RCC_AHB3ENR, 1, "qspi", "ahb_div",
CLK_IGNORE_UNUSED },
{ STM32F4_RCC_APB1ENR, 0, "tim2", "apb1_mul" },
{ STM32F4_RCC_APB1ENR, 1, "tim3", "apb1_mul" },
{ STM32F4_RCC_APB1ENR, 2, "tim4", "apb1_mul" },
{ STM32F4_RCC_APB1ENR, 3, "tim5", "apb1_mul" },
{ STM32F4_RCC_APB1ENR, 4, "tim6", "apb1_mul" },
{ STM32F4_RCC_APB1ENR, 5, "tim7", "apb1_mul" },
{ STM32F4_RCC_APB1ENR, 6, "tim12", "apb1_mul" },
{ STM32F4_RCC_APB1ENR, 7, "tim13", "apb1_mul" },
{ STM32F4_RCC_APB1ENR, 8, "tim14", "apb1_mul" },
{ STM32F4_RCC_APB1ENR, 11, "wwdg", "apb1_div" },
{ STM32F4_RCC_APB1ENR, 14, "spi2", "apb1_div" },
{ STM32F4_RCC_APB1ENR, 15, "spi3", "apb1_div" },
{ STM32F4_RCC_APB1ENR, 16, "spdifrx", "apb1_div" },
{ STM32F4_RCC_APB1ENR, 25, "can1", "apb1_div" },
{ STM32F4_RCC_APB1ENR, 26, "can2", "apb1_div" },
{ STM32F4_RCC_APB1ENR, 27, "cec", "apb1_div" },
{ STM32F4_RCC_APB1ENR, 28, "pwr", "apb1_div" },
{ STM32F4_RCC_APB1ENR, 29, "dac", "apb1_div" },
{ STM32F4_RCC_APB2ENR, 0, "tim1", "apb2_mul" },
{ STM32F4_RCC_APB2ENR, 1, "tim8", "apb2_mul" },
{ STM32F4_RCC_APB2ENR, 8, "adc1", "apb2_div" },
{ STM32F4_RCC_APB2ENR, 9, "adc2", "apb2_div" },
{ STM32F4_RCC_APB2ENR, 10, "adc3", "apb2_div" },
{ STM32F4_RCC_APB2ENR, 11, "sdmmc", "sdmux" },
{ STM32F4_RCC_APB2ENR, 12, "spi1", "apb2_div" },
{ STM32F4_RCC_APB2ENR, 13, "spi4", "apb2_div" },
{ STM32F4_RCC_APB2ENR, 14, "syscfg", "apb2_div" },
{ STM32F4_RCC_APB2ENR, 16, "tim9", "apb2_mul" },
{ STM32F4_RCC_APB2ENR, 17, "tim10", "apb2_mul" },
{ STM32F4_RCC_APB2ENR, 18, "tim11", "apb2_mul" },
{ STM32F4_RCC_APB2ENR, 20, "spi5", "apb2_div" },
{ STM32F4_RCC_APB2ENR, 21, "spi6", "apb2_div" },
{ STM32F4_RCC_APB2ENR, 22, "sai1", "apb2_div" },
{ STM32F4_RCC_APB2ENR, 23, "sai2", "apb2_div" },
{ STM32F4_RCC_APB2ENR, 26, "ltdc", "apb2_div" },
};
/*
* This bitmask tells us which bit offsets (0..192) on STM32F4[23]xxx
* have gate bits associated with them. Its combined hweight is 71.
*/
#define MAX_GATE_MAP 3
static const u64 stm32f42xx_gate_map[MAX_GATE_MAP] = { 0x000000f17ef417ffull,
0x0000000000000001ull,
0x04777f33f6fec9ffull };
static const u64 stm32f46xx_gate_map[MAX_GATE_MAP] = { 0x000000f17ef417ffull,
0x0000000000000003ull,
0x0c777f33f6fec9ffull };
static const u64 stm32f746_gate_map[MAX_GATE_MAP] = { 0x000000f17ef417ffull,
0x0000000000000003ull,
0x04f77f033e01c9ffull };
static const u64 *stm32f4_gate_map;
static struct clk_hw **clks;
static DEFINE_SPINLOCK(stm32f4_clk_lock);
static void __iomem *base;
static struct regmap *pdrm;
static int stm32fx_end_primary_clk;
/*
* "Multiplier" device for APBx clocks.
*
* The APBx dividers are power-of-two dividers and, if *not* running in 1:1
* mode, they also tap out the one of the low order state bits to run the
* timers. ST datasheets represent this feature as a (conditional) clock
* multiplier.
*/
struct clk_apb_mul {
struct clk_hw hw;
u8 bit_idx;
};
#define to_clk_apb_mul(_hw) container_of(_hw, struct clk_apb_mul, hw)
static unsigned long clk_apb_mul_recalc_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
struct clk_apb_mul *am = to_clk_apb_mul(hw);
if (readl(base + STM32F4_RCC_CFGR) & BIT(am->bit_idx))
return parent_rate * 2;
return parent_rate;
}
static long clk_apb_mul_round_rate(struct clk_hw *hw, unsigned long rate,
unsigned long *prate)
{
struct clk_apb_mul *am = to_clk_apb_mul(hw);
unsigned long mult = 1;
if (readl(base + STM32F4_RCC_CFGR) & BIT(am->bit_idx))
mult = 2;
if (clk_hw_get_flags(hw) & CLK_SET_RATE_PARENT) {
unsigned long best_parent = rate / mult;
*prate = clk_hw_round_rate(clk_hw_get_parent(hw), best_parent);
}
return *prate * mult;
}
static int clk_apb_mul_set_rate(struct clk_hw *hw, unsigned long rate,
unsigned long parent_rate)
{
/*
* We must report success but we can do so unconditionally because
* clk_apb_mul_round_rate returns values that ensure this call is a
* nop.
*/
return 0;
}
static const struct clk_ops clk_apb_mul_factor_ops = {
.round_rate = clk_apb_mul_round_rate,
.set_rate = clk_apb_mul_set_rate,
.recalc_rate = clk_apb_mul_recalc_rate,
};
static struct clk *clk_register_apb_mul(struct device *dev, const char *name,
const char *parent_name,
unsigned long flags, u8 bit_idx)
{
struct clk_apb_mul *am;
struct clk_init_data init;
struct clk *clk;
am = kzalloc(sizeof(*am), GFP_KERNEL);
if (!am)
return ERR_PTR(-ENOMEM);
am->bit_idx = bit_idx;
am->hw.init = &init;
init.name = name;
init.ops = &clk_apb_mul_factor_ops;
init.flags = flags;
init.parent_names = &parent_name;
init.num_parents = 1;
clk = clk_register(dev, &am->hw);
if (IS_ERR(clk))
kfree(am);
return clk;
}
enum {
PLL,
PLL_I2S,
PLL_SAI,
};
static const struct clk_div_table pll_divp_table[] = {
{ 0, 2 }, { 1, 4 }, { 2, 6 }, { 3, 8 }, { 0 }
};
static const struct clk_div_table pll_divq_table[] = {
{ 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 },
{ 0 }
};
static const struct clk_div_table pll_divr_table[] = {
{ 2, 2 }, { 3, 3 }, { 4, 4 }, { 5, 5 }, { 6, 6 }, { 7, 7 }, { 0 }
};
struct stm32f4_pll {
spinlock_t *lock;
struct clk_gate gate;
u8 offset;
u8 bit_rdy_idx;
u8 status;
u8 n_start;
};
#define to_stm32f4_pll(_gate) container_of(_gate, struct stm32f4_pll, gate)
struct stm32f4_pll_post_div_data {
int idx;
u8 pll_num;
const char *name;
const char *parent;
u8 flag;
u8 offset;
u8 shift;
u8 width;
u8 flag_div;
const struct clk_div_table *div_table;
};
struct stm32f4_vco_data {
const char *vco_name;
u8 offset;
u8 bit_idx;
u8 bit_rdy_idx;
};
static const struct stm32f4_vco_data vco_data[] = {
{ "vco", STM32F4_RCC_PLLCFGR, 24, 25 },
{ "vco-i2s", STM32F4_RCC_PLLI2SCFGR, 26, 27 },
{ "vco-sai", STM32F4_RCC_PLLSAICFGR, 28, 29 },
};
static const struct clk_div_table post_divr_table[] = {
{ 0, 2 }, { 1, 4 }, { 2, 8 }, { 3, 16 }, { 0 }
};
#define MAX_POST_DIV 3
static const struct stm32f4_pll_post_div_data post_div_data[MAX_POST_DIV] = {
{ CLK_I2SQ_PDIV, PLL_I2S, "plli2s-q-div", "plli2s-q",
CLK_SET_RATE_PARENT, STM32F4_RCC_DCKCFGR, 0, 5, 0, NULL},
{ CLK_SAIQ_PDIV, PLL_SAI, "pllsai-q-div", "pllsai-q",
CLK_SET_RATE_PARENT, STM32F4_RCC_DCKCFGR, 8, 5, 0, NULL },
{ NO_IDX, PLL_SAI, "pllsai-r-div", "pllsai-r", CLK_SET_RATE_PARENT,
STM32F4_RCC_DCKCFGR, 16, 2, 0, post_divr_table },
};
struct stm32f4_div_data {
u8 shift;
u8 width;
u8 flag_div;
const struct clk_div_table *div_table;
};
#define MAX_PLL_DIV 3
static const struct stm32f4_div_data div_data[MAX_PLL_DIV] = {
{ 16, 2, 0, pll_divp_table },
{ 24, 4, 0, pll_divq_table },
{ 28, 3, 0, pll_divr_table },
};
struct stm32f4_pll_data {
u8 pll_num;
u8 n_start;
const char *div_name[MAX_PLL_DIV];
};
static const struct stm32f4_pll_data stm32f429_pll[MAX_PLL_DIV] = {
{ PLL, 192, { "pll", "pll48", NULL } },
{ PLL_I2S, 192, { NULL, "plli2s-q", "plli2s-r" } },
{ PLL_SAI, 49, { NULL, "pllsai-q", "pllsai-r" } },
};
static const struct stm32f4_pll_data stm32f469_pll[MAX_PLL_DIV] = {
{ PLL, 50, { "pll", "pll-q", NULL } },
{ PLL_I2S, 50, { "plli2s-p", "plli2s-q", "plli2s-r" } },
{ PLL_SAI, 50, { "pllsai-p", "pllsai-q", "pllsai-r" } },
};
static int stm32f4_pll_is_enabled(struct clk_hw *hw)
{
return clk_gate_ops.is_enabled(hw);
}
#define PLL_TIMEOUT 10000
static int stm32f4_pll_enable(struct clk_hw *hw)
{
struct clk_gate *gate = to_clk_gate(hw);
struct stm32f4_pll *pll = to_stm32f4_pll(gate);
int bit_status;
unsigned int timeout = PLL_TIMEOUT;
if (clk_gate_ops.is_enabled(hw))
return 0;
clk_gate_ops.enable(hw);
do {
bit_status = !(readl(gate->reg) & BIT(pll->bit_rdy_idx));
} while (bit_status && --timeout);
return bit_status;
}
static void stm32f4_pll_disable(struct clk_hw *hw)
{
clk_gate_ops.disable(hw);
}
static unsigned long stm32f4_pll_recalc(struct clk_hw *hw,
unsigned long parent_rate)
{
struct clk_gate *gate = to_clk_gate(hw);
struct stm32f4_pll *pll = to_stm32f4_pll(gate);
unsigned long n;
n = (readl(base + pll->offset) >> 6) & 0x1ff;
return parent_rate * n;
}
static long stm32f4_pll_round_rate(struct clk_hw *hw, unsigned long rate,
unsigned long *prate)
{
struct clk_gate *gate = to_clk_gate(hw);
struct stm32f4_pll *pll = to_stm32f4_pll(gate);
unsigned long n;
n = rate / *prate;
if (n < pll->n_start)
n = pll->n_start;
else if (n > 432)
n = 432;
return *prate * n;
}
static int stm32f4_pll_set_rate(struct clk_hw *hw, unsigned long rate,
unsigned long parent_rate)
{
struct clk_gate *gate = to_clk_gate(hw);
struct stm32f4_pll *pll = to_stm32f4_pll(gate);
unsigned long n;
unsigned long val;
int pll_state;
pll_state = stm32f4_pll_is_enabled(hw);
if (pll_state)
stm32f4_pll_disable(hw);
n = rate / parent_rate;
val = readl(base + pll->offset) & ~(0x1ff << 6);
writel(val | ((n & 0x1ff) << 6), base + pll->offset);
if (pll_state)
stm32f4_pll_enable(hw);
return 0;
}
static const struct clk_ops stm32f4_pll_gate_ops = {
.enable = stm32f4_pll_enable,
.disable = stm32f4_pll_disable,
.is_enabled = stm32f4_pll_is_enabled,
.recalc_rate = stm32f4_pll_recalc,
.round_rate = stm32f4_pll_round_rate,
.set_rate = stm32f4_pll_set_rate,
};
struct stm32f4_pll_div {
struct clk_divider div;
struct clk_hw *hw_pll;
};
#define to_pll_div_clk(_div) container_of(_div, struct stm32f4_pll_div, div)
static unsigned long stm32f4_pll_div_recalc_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
return clk_divider_ops.recalc_rate(hw, parent_rate);
}
static long stm32f4_pll_div_round_rate(struct clk_hw *hw, unsigned long rate,
unsigned long *prate)
{
return clk_divider_ops.round_rate(hw, rate, prate);
}
static int stm32f4_pll_div_set_rate(struct clk_hw *hw, unsigned long rate,
unsigned long parent_rate)
{
int pll_state, ret;
struct clk_divider *div = to_clk_divider(hw);
struct stm32f4_pll_div *pll_div = to_pll_div_clk(div);
pll_state = stm32f4_pll_is_enabled(pll_div->hw_pll);
if (pll_state)
stm32f4_pll_disable(pll_div->hw_pll);
ret = clk_divider_ops.set_rate(hw, rate, parent_rate);
if (pll_state)
stm32f4_pll_enable(pll_div->hw_pll);
return ret;
}
static const struct clk_ops stm32f4_pll_div_ops = {
.recalc_rate = stm32f4_pll_div_recalc_rate,
.round_rate = stm32f4_pll_div_round_rate,
.set_rate = stm32f4_pll_div_set_rate,
};
static struct clk_hw *clk_register_pll_div(const char *name,
const char *parent_name, unsigned long flags,
void __iomem *reg, u8 shift, u8 width,
u8 clk_divider_flags, const struct clk_div_table *table,
struct clk_hw *pll_hw, spinlock_t *lock)
{
struct stm32f4_pll_div *pll_div;
struct clk_hw *hw;
struct clk_init_data init;
int ret;
/* allocate the divider */
pll_div = kzalloc(sizeof(*pll_div), GFP_KERNEL);
if (!pll_div)
return ERR_PTR(-ENOMEM);
init.name = name;
init.ops = &stm32f4_pll_div_ops;
init.flags = flags;
init.parent_names = (parent_name ? &parent_name : NULL);
init.num_parents = (parent_name ? 1 : 0);
/* struct clk_divider assignments */
pll_div->div.reg = reg;
pll_div->div.shift = shift;
pll_div->div.width = width;
pll_div->div.flags = clk_divider_flags;
pll_div->div.lock = lock;
pll_div->div.table = table;
pll_div->div.hw.init = &init;
pll_div->hw_pll = pll_hw;
/* register the clock */
hw = &pll_div->div.hw;
ret = clk_hw_register(NULL, hw);
if (ret) {
kfree(pll_div);
hw = ERR_PTR(ret);
}
return hw;
}
static struct clk_hw *stm32f4_rcc_register_pll(const char *pllsrc,
const struct stm32f4_pll_data *data, spinlock_t *lock)
{
struct stm32f4_pll *pll;
struct clk_init_data init = { NULL };
void __iomem *reg;
struct clk_hw *pll_hw;
int ret;
int i;
const struct stm32f4_vco_data *vco;
pll = kzalloc(sizeof(*pll), GFP_KERNEL);
if (!pll)
return ERR_PTR(-ENOMEM);
vco = &vco_data[data->pll_num];
init.name = vco->vco_name;
init.ops = &stm32f4_pll_gate_ops;
init.flags = CLK_SET_RATE_GATE;
init.parent_names = &pllsrc;
init.num_parents = 1;
pll->gate.lock = lock;
pll->gate.reg = base + STM32F4_RCC_CR;
pll->gate.bit_idx = vco->bit_idx;
pll->gate.hw.init = &init;
pll->offset = vco->offset;
pll->n_start = data->n_start;
pll->bit_rdy_idx = vco->bit_rdy_idx;
pll->status = (readl(base + STM32F4_RCC_CR) >> vco->bit_idx) & 0x1;
reg = base + pll->offset;
pll_hw = &pll->gate.hw;
ret = clk_hw_register(NULL, pll_hw);
if (ret) {
kfree(pll);
return ERR_PTR(ret);
}
for (i = 0; i < MAX_PLL_DIV; i++)
if (data->div_name[i])
clk_register_pll_div(data->div_name[i],
vco->vco_name,
0,
reg,
div_data[i].shift,
div_data[i].width,
div_data[i].flag_div,
div_data[i].div_table,
pll_hw,
lock);
return pll_hw;
}
/*
* Converts the primary and secondary indices (as they appear in DT) to an
* offset into our struct clock array.
*/
static int stm32f4_rcc_lookup_clk_idx(u8 primary, u8 secondary)
{
u64 table[MAX_GATE_MAP];
if (primary == 1) {
if (WARN_ON(secondary >= stm32fx_end_primary_clk))
return -EINVAL;
return secondary;
}
memcpy(table, stm32f4_gate_map, sizeof(table));
/* only bits set in table can be used as indices */
if (WARN_ON(secondary >= BITS_PER_BYTE * sizeof(table) ||
0 == (table[BIT_ULL_WORD(secondary)] &
BIT_ULL_MASK(secondary))))
return -EINVAL;
/* mask out bits above our current index */
table[BIT_ULL_WORD(secondary)] &=
GENMASK_ULL(secondary % BITS_PER_LONG_LONG, 0);
return stm32fx_end_primary_clk - 1 + hweight64(table[0]) +
(BIT_ULL_WORD(secondary) >= 1 ? hweight64(table[1]) : 0) +
(BIT_ULL_WORD(secondary) >= 2 ? hweight64(table[2]) : 0);
}
static struct clk_hw *
stm32f4_rcc_lookup_clk(struct of_phandle_args *clkspec, void *data)
{
int i = stm32f4_rcc_lookup_clk_idx(clkspec->args[0], clkspec->args[1]);
if (i < 0)
return ERR_PTR(-EINVAL);
return clks[i];
}
#define to_rgclk(_rgate) container_of(_rgate, struct stm32_rgate, gate)
static inline void disable_power_domain_write_protection(void)
{
if (pdrm)
regmap_update_bits(pdrm, 0x00, (1 << 8), (1 << 8));
}
static inline void enable_power_domain_write_protection(void)
{
if (pdrm)
regmap_update_bits(pdrm, 0x00, (1 << 8), (0 << 8));
}
static inline void sofware_reset_backup_domain(void)
{
unsigned long val;
val = readl(base + STM32F4_RCC_BDCR);
writel(val | BIT(16), base + STM32F4_RCC_BDCR);
writel(val & ~BIT(16), base + STM32F4_RCC_BDCR);
}
struct stm32_rgate {
struct clk_gate gate;
u8 bit_rdy_idx;
};
#define RGATE_TIMEOUT 50000
static int rgclk_enable(struct clk_hw *hw)
{
struct clk_gate *gate = to_clk_gate(hw);
struct stm32_rgate *rgate = to_rgclk(gate);
int bit_status;
unsigned int timeout = RGATE_TIMEOUT;
if (clk_gate_ops.is_enabled(hw))
return 0;
disable_power_domain_write_protection();
clk_gate_ops.enable(hw);
do {
bit_status = !(readl(gate->reg) & BIT(rgate->bit_rdy_idx));
if (bit_status)
udelay(100);
} while (bit_status && --timeout);
enable_power_domain_write_protection();
return bit_status;
}
static void rgclk_disable(struct clk_hw *hw)
{
clk_gate_ops.disable(hw);
}
static int rgclk_is_enabled(struct clk_hw *hw)
{
return clk_gate_ops.is_enabled(hw);
}
static const struct clk_ops rgclk_ops = {
.enable = rgclk_enable,
.disable = rgclk_disable,
.is_enabled = rgclk_is_enabled,
};
static struct clk_hw *clk_register_rgate(struct device *dev, const char *name,
const char *parent_name, unsigned long flags,
void __iomem *reg, u8 bit_idx, u8 bit_rdy_idx,
u8 clk_gate_flags, spinlock_t *lock)
{
struct stm32_rgate *rgate;
struct clk_init_data init = { NULL };
struct clk_hw *hw;
int ret;
rgate = kzalloc(sizeof(*rgate), GFP_KERNEL);
if (!rgate)
return ERR_PTR(-ENOMEM);
init.name = name;
init.ops = &rgclk_ops;
init.flags = flags;
init.parent_names = &parent_name;
init.num_parents = 1;
rgate->bit_rdy_idx = bit_rdy_idx;
rgate->gate.lock = lock;
rgate->gate.reg = reg;
rgate->gate.bit_idx = bit_idx;
rgate->gate.hw.init = &init;
hw = &rgate->gate.hw;
ret = clk_hw_register(dev, hw);
if (ret) {
kfree(rgate);
hw = ERR_PTR(ret);
}
return hw;
}
static int cclk_gate_enable(struct clk_hw *hw)
{
int ret;
disable_power_domain_write_protection();
ret = clk_gate_ops.enable(hw);
enable_power_domain_write_protection();
return ret;
}
static void cclk_gate_disable(struct clk_hw *hw)
{
disable_power_domain_write_protection();
clk_gate_ops.disable(hw);
enable_power_domain_write_protection();
}
static int cclk_gate_is_enabled(struct clk_hw *hw)
{
return clk_gate_ops.is_enabled(hw);
}
static const struct clk_ops cclk_gate_ops = {
.enable = cclk_gate_enable,
.disable = cclk_gate_disable,
.is_enabled = cclk_gate_is_enabled,
};
static u8 cclk_mux_get_parent(struct clk_hw *hw)
{
return clk_mux_ops.get_parent(hw);
}
static int cclk_mux_set_parent(struct clk_hw *hw, u8 index)
{
int ret;
disable_power_domain_write_protection();
sofware_reset_backup_domain();
ret = clk_mux_ops.set_parent(hw, index);
enable_power_domain_write_protection();
return ret;
}
static const struct clk_ops cclk_mux_ops = {
.get_parent = cclk_mux_get_parent,
.set_parent = cclk_mux_set_parent,
};
static struct clk_hw *stm32_register_cclk(struct device *dev, const char *name,
const char * const *parent_names, int num_parents,
void __iomem *reg, u8 bit_idx, u8 shift, unsigned long flags,
spinlock_t *lock)
{
struct clk_hw *hw;
struct clk_gate *gate;
struct clk_mux *mux;
gate = kzalloc(sizeof(*gate), GFP_KERNEL);
if (!gate) {
hw = ERR_PTR(-EINVAL);
goto fail;
}
mux = kzalloc(sizeof(*mux), GFP_KERNEL);
if (!mux) {
kfree(gate);
hw = ERR_PTR(-EINVAL);
goto fail;
}
gate->reg = reg;
gate->bit_idx = bit_idx;
gate->flags = 0;
gate->lock = lock;
mux->reg = reg;
mux->shift = shift;
mux->mask = 3;
mux->flags = 0;
hw = clk_hw_register_composite(dev, name, parent_names, num_parents,
&mux->hw, &cclk_mux_ops,
NULL, NULL,
&gate->hw, &cclk_gate_ops,
flags);
if (IS_ERR(hw)) {
kfree(gate);
kfree(mux);
}
fail:
return hw;
}
static const char *sys_parents[] __initdata = { "hsi", NULL, "pll" };
static const struct clk_div_table ahb_div_table[] = {
{ 0x0, 1 }, { 0x1, 1 }, { 0x2, 1 }, { 0x3, 1 },
{ 0x4, 1 }, { 0x5, 1 }, { 0x6, 1 }, { 0x7, 1 },
{ 0x8, 2 }, { 0x9, 4 }, { 0xa, 8 }, { 0xb, 16 },
{ 0xc, 64 }, { 0xd, 128 }, { 0xe, 256 }, { 0xf, 512 },
{ 0 },
};
static const struct clk_div_table apb_div_table[] = {
{ 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 },
{ 4, 2 }, { 5, 4 }, { 6, 8 }, { 7, 16 },
{ 0 },
};
static const char *rtc_parents[4] = {
"no-clock", "lse", "lsi", "hse-rtc"
};
static const char *lcd_parent[1] = { "pllsai-r-div" };
static const char *i2s_parents[2] = { "plli2s-r", NULL };
static const char *sai_parents[4] = { "pllsai-q-div", "plli2s-q-div", NULL,
"no-clock" };
static const char *pll48_parents[2] = { "pll-q", "pllsai-p" };
static const char *sdmux_parents[2] = { "pll48", "sys" };
static const char *hdmi_parents[2] = { "lse", "hsi_div488" };
static const char *spdif_parent[1] = { "plli2s-p" };
static const char *lptim_parent[4] = { "apb1_mul", "lsi", "hsi", "lse" };
static const char *uart_parents1[4] = { "apb2_div", "sys", "hsi", "lse" };
static const char *uart_parents2[4] = { "apb1_div", "sys", "hsi", "lse" };
static const char *i2c_parents[4] = { "apb1_div", "sys", "hsi", "no-clock" };
struct stm32_aux_clk {
int idx;
const char *name;
const char * const *parent_names;
int num_parents;
int offset_mux;
u8 shift;
u8 mask;
int offset_gate;
u8 bit_idx;
unsigned long flags;
};
struct stm32f4_clk_data {
const struct stm32f4_gate_data *gates_data;
const u64 *gates_map;
int gates_num;
const struct stm32f4_pll_data *pll_data;
const struct stm32_aux_clk *aux_clk;
int aux_clk_num;
int end_primary;
};
static const struct stm32_aux_clk stm32f429_aux_clk[] = {
{
CLK_LCD, "lcd-tft", lcd_parent, ARRAY_SIZE(lcd_parent),
NO_MUX, 0, 0,
STM32F4_RCC_APB2ENR, 26,
CLK_SET_RATE_PARENT
},
{
CLK_I2S, "i2s", i2s_parents, ARRAY_SIZE(i2s_parents),
STM32F4_RCC_CFGR, 23, 1,
NO_GATE, 0,
CLK_SET_RATE_PARENT
},
{
CLK_SAI1, "sai1-a", sai_parents, ARRAY_SIZE(sai_parents),
STM32F4_RCC_DCKCFGR, 20, 3,
STM32F4_RCC_APB2ENR, 22,
CLK_SET_RATE_PARENT
},
{
CLK_SAI2, "sai1-b", sai_parents, ARRAY_SIZE(sai_parents),
STM32F4_RCC_DCKCFGR, 22, 3,
STM32F4_RCC_APB2ENR, 22,
CLK_SET_RATE_PARENT
},
};
static const struct stm32_aux_clk stm32f469_aux_clk[] = {
{
CLK_LCD, "lcd-tft", lcd_parent, ARRAY_SIZE(lcd_parent),
NO_MUX, 0, 0,
STM32F4_RCC_APB2ENR, 26,
CLK_SET_RATE_PARENT
},
{
CLK_I2S, "i2s", i2s_parents, ARRAY_SIZE(i2s_parents),
STM32F4_RCC_CFGR, 23, 1,
NO_GATE, 0,
CLK_SET_RATE_PARENT
},
{
CLK_SAI1, "sai1-a", sai_parents, ARRAY_SIZE(sai_parents),
STM32F4_RCC_DCKCFGR, 20, 3,
STM32F4_RCC_APB2ENR, 22,
CLK_SET_RATE_PARENT
},
{
CLK_SAI2, "sai1-b", sai_parents, ARRAY_SIZE(sai_parents),
STM32F4_RCC_DCKCFGR, 22, 3,
STM32F4_RCC_APB2ENR, 22,
CLK_SET_RATE_PARENT
},
{
NO_IDX, "pll48", pll48_parents, ARRAY_SIZE(pll48_parents),
STM32F4_RCC_DCKCFGR, 27, 1,
NO_GATE, 0,
0
},
{
NO_IDX, "sdmux", sdmux_parents, ARRAY_SIZE(sdmux_parents),
STM32F4_RCC_DCKCFGR, 28, 1,
NO_GATE, 0,
0
},
};
static const struct stm32_aux_clk stm32f746_aux_clk[] = {
{
CLK_LCD, "lcd-tft", lcd_parent, ARRAY_SIZE(lcd_parent),
NO_MUX, 0, 0,
STM32F4_RCC_APB2ENR, 26,
CLK_SET_RATE_PARENT
},
{
CLK_I2S, "i2s", i2s_parents, ARRAY_SIZE(i2s_parents),
STM32F4_RCC_CFGR, 23, 1,
NO_GATE, 0,
CLK_SET_RATE_PARENT
},
{
CLK_SAI1, "sai1_clk", sai_parents, ARRAY_SIZE(sai_parents),
STM32F4_RCC_DCKCFGR, 20, 3,
STM32F4_RCC_APB2ENR, 22,
CLK_SET_RATE_PARENT
},
{
CLK_SAI2, "sai2_clk", sai_parents, ARRAY_SIZE(sai_parents),
STM32F4_RCC_DCKCFGR, 22, 3,
STM32F4_RCC_APB2ENR, 23,
CLK_SET_RATE_PARENT
},
{
NO_IDX, "pll48", pll48_parents, ARRAY_SIZE(pll48_parents),
STM32F7_RCC_DCKCFGR2, 27, 1,
NO_GATE, 0,
0
},
{
NO_IDX, "sdmux", sdmux_parents, ARRAY_SIZE(sdmux_parents),
STM32F7_RCC_DCKCFGR2, 28, 1,
NO_GATE, 0,
0
},
{
CLK_HDMI_CEC, "hdmi-cec",
hdmi_parents, ARRAY_SIZE(hdmi_parents),
STM32F7_RCC_DCKCFGR2, 26, 1,
NO_GATE, 0,
0
},
{
CLK_SPDIF, "spdif-rx",
spdif_parent, ARRAY_SIZE(spdif_parent),
STM32F7_RCC_DCKCFGR2, 22, 3,
STM32F4_RCC_APB2ENR, 23,
CLK_SET_RATE_PARENT
},
{
CLK_USART1, "usart1",
uart_parents1, ARRAY_SIZE(uart_parents1),
STM32F7_RCC_DCKCFGR2, 0, 3,
STM32F4_RCC_APB2ENR, 4,
CLK_SET_RATE_PARENT,
},
{
CLK_USART2, "usart2",
uart_parents2, ARRAY_SIZE(uart_parents1),
STM32F7_RCC_DCKCFGR2, 2, 3,
STM32F4_RCC_APB1ENR, 17,
CLK_SET_RATE_PARENT,
},
{
CLK_USART3, "usart3",
uart_parents2, ARRAY_SIZE(uart_parents1),
STM32F7_RCC_DCKCFGR2, 4, 3,
STM32F4_RCC_APB1ENR, 18,
CLK_SET_RATE_PARENT,
},
{
CLK_UART4, "uart4",
uart_parents2, ARRAY_SIZE(uart_parents1),
STM32F7_RCC_DCKCFGR2, 6, 3,
STM32F4_RCC_APB1ENR, 19,
CLK_SET_RATE_PARENT,
},
{
CLK_UART5, "uart5",
uart_parents2, ARRAY_SIZE(uart_parents1),
STM32F7_RCC_DCKCFGR2, 8, 3,
STM32F4_RCC_APB1ENR, 20,
CLK_SET_RATE_PARENT,
},
{
CLK_USART6, "usart6",
uart_parents1, ARRAY_SIZE(uart_parents1),
STM32F7_RCC_DCKCFGR2, 10, 3,
STM32F4_RCC_APB2ENR, 5,
CLK_SET_RATE_PARENT,
},
{
CLK_UART7, "uart7",
uart_parents2, ARRAY_SIZE(uart_parents1),
STM32F7_RCC_DCKCFGR2, 12, 3,
STM32F4_RCC_APB1ENR, 30,
CLK_SET_RATE_PARENT,
},
{
CLK_UART8, "uart8",
uart_parents2, ARRAY_SIZE(uart_parents1),
STM32F7_RCC_DCKCFGR2, 14, 3,
STM32F4_RCC_APB1ENR, 31,
CLK_SET_RATE_PARENT,
},
{
CLK_I2C1, "i2c1",
i2c_parents, ARRAY_SIZE(i2c_parents),
STM32F7_RCC_DCKCFGR2, 16, 3,
STM32F4_RCC_APB1ENR, 21,
CLK_SET_RATE_PARENT,
},
{
CLK_I2C2, "i2c2",
i2c_parents, ARRAY_SIZE(i2c_parents),
STM32F7_RCC_DCKCFGR2, 18, 3,
STM32F4_RCC_APB1ENR, 22,
CLK_SET_RATE_PARENT,
},
{
CLK_I2C3, "i2c3",
i2c_parents, ARRAY_SIZE(i2c_parents),
STM32F7_RCC_DCKCFGR2, 20, 3,
STM32F4_RCC_APB1ENR, 23,
CLK_SET_RATE_PARENT,
},
{
CLK_I2C4, "i2c4",
i2c_parents, ARRAY_SIZE(i2c_parents),
STM32F7_RCC_DCKCFGR2, 22, 3,
STM32F4_RCC_APB1ENR, 24,
CLK_SET_RATE_PARENT,
},
{
CLK_LPTIMER, "lptim1",
lptim_parent, ARRAY_SIZE(lptim_parent),
STM32F7_RCC_DCKCFGR2, 24, 3,
STM32F4_RCC_APB1ENR, 9,
CLK_SET_RATE_PARENT
},
};
static const struct stm32f4_clk_data stm32f429_clk_data = {
.end_primary = END_PRIMARY_CLK,
.gates_data = stm32f429_gates,
.gates_map = stm32f42xx_gate_map,
.gates_num = ARRAY_SIZE(stm32f429_gates),
.pll_data = stm32f429_pll,
.aux_clk = stm32f429_aux_clk,
.aux_clk_num = ARRAY_SIZE(stm32f429_aux_clk),
};
static const struct stm32f4_clk_data stm32f469_clk_data = {
.end_primary = END_PRIMARY_CLK,
.gates_data = stm32f469_gates,
.gates_map = stm32f46xx_gate_map,
.gates_num = ARRAY_SIZE(stm32f469_gates),
.pll_data = stm32f469_pll,
.aux_clk = stm32f469_aux_clk,
.aux_clk_num = ARRAY_SIZE(stm32f469_aux_clk),
};
static const struct stm32f4_clk_data stm32f746_clk_data = {
.end_primary = END_PRIMARY_CLK_F7,
.gates_data = stm32f746_gates,
.gates_map = stm32f746_gate_map,
.gates_num = ARRAY_SIZE(stm32f746_gates),
.pll_data = stm32f469_pll,
.aux_clk = stm32f746_aux_clk,
.aux_clk_num = ARRAY_SIZE(stm32f746_aux_clk),
};
static const struct of_device_id stm32f4_of_match[] = {
{
.compatible = "st,stm32f42xx-rcc",
.data = &stm32f429_clk_data
},
{
.compatible = "st,stm32f469-rcc",
.data = &stm32f469_clk_data
},
{
.compatible = "st,stm32f746-rcc",
.data = &stm32f746_clk_data
},
{}
};
static struct clk_hw *stm32_register_aux_clk(const char *name,
const char * const *parent_names, int num_parents,
int offset_mux, u8 shift, u8 mask,
int offset_gate, u8 bit_idx,
unsigned long flags, spinlock_t *lock)
{
struct clk_hw *hw;
struct clk_gate *gate = NULL;
struct clk_mux *mux = NULL;
struct clk_hw *mux_hw = NULL, *gate_hw = NULL;
const struct clk_ops *mux_ops = NULL, *gate_ops = NULL;
if (offset_gate != NO_GATE) {
gate = kzalloc(sizeof(*gate), GFP_KERNEL);
if (!gate) {
hw = ERR_PTR(-EINVAL);
goto fail;
}
gate->reg = base + offset_gate;
gate->bit_idx = bit_idx;
gate->flags = 0;
gate->lock = lock;
gate_hw = &gate->hw;
gate_ops = &clk_gate_ops;
}
if (offset_mux != NO_MUX) {
mux = kzalloc(sizeof(*mux), GFP_KERNEL);
if (!mux) {
hw = ERR_PTR(-EINVAL);
goto fail;
}
mux->reg = base + offset_mux;
mux->shift = shift;
mux->mask = mask;
mux->flags = 0;
mux_hw = &mux->hw;
mux_ops = &clk_mux_ops;
}
if (mux_hw == NULL && gate_hw == NULL) {
hw = ERR_PTR(-EINVAL);
goto fail;
}
hw = clk_hw_register_composite(NULL, name, parent_names, num_parents,
mux_hw, mux_ops,
NULL, NULL,
gate_hw, gate_ops,
flags);
fail:
if (IS_ERR(hw)) {
kfree(gate);
kfree(mux);
}
return hw;
}
static void __init stm32f4_rcc_init(struct device_node *np)
{
const char *hse_clk, *i2s_in_clk;
int n;
const struct of_device_id *match;
const struct stm32f4_clk_data *data;
unsigned long pllcfgr;
const char *pllsrc;
unsigned long pllm;
base = of_iomap(np, 0);
if (!base) {
pr_err("%s: unable to map resource", np->name);
return;
}
pdrm = syscon_regmap_lookup_by_phandle(np, "st,syscfg");
if (IS_ERR(pdrm)) {
pdrm = NULL;
pr_warn("%s: Unable to get syscfg\n", __func__);
}
match = of_match_node(stm32f4_of_match, np);
if (WARN_ON(!match))
return;
data = match->data;
stm32fx_end_primary_clk = data->end_primary;
clks = kmalloc_array(data->gates_num + stm32fx_end_primary_clk,
sizeof(*clks), GFP_KERNEL);
if (!clks)
goto fail;
stm32f4_gate_map = data->gates_map;
hse_clk = of_clk_get_parent_name(np, 0);
i2s_in_clk = of_clk_get_parent_name(np, 1);
i2s_parents[1] = i2s_in_clk;
sai_parents[2] = i2s_in_clk;
clks[CLK_HSI] = clk_hw_register_fixed_rate_with_accuracy(NULL, "hsi",
NULL, 0, 16000000, 160000);
pllcfgr = readl(base + STM32F4_RCC_PLLCFGR);
pllsrc = pllcfgr & BIT(22) ? hse_clk : "hsi";
pllm = pllcfgr & 0x3f;
clk_hw_register_fixed_factor(NULL, "vco_in", pllsrc,
0, 1, pllm);
stm32f4_rcc_register_pll("vco_in", &data->pll_data[0],
&stm32f4_clk_lock);
clks[PLL_VCO_I2S] = stm32f4_rcc_register_pll("vco_in",
&data->pll_data[1], &stm32f4_clk_lock);
clks[PLL_VCO_SAI] = stm32f4_rcc_register_pll("vco_in",
&data->pll_data[2], &stm32f4_clk_lock);
for (n = 0; n < MAX_POST_DIV; n++) {
const struct stm32f4_pll_post_div_data *post_div;
struct clk_hw *hw;
post_div = &post_div_data[n];
hw = clk_register_pll_div(post_div->name,
post_div->parent,
post_div->flag,
base + post_div->offset,
post_div->shift,
post_div->width,
post_div->flag_div,
post_div->div_table,
clks[post_div->pll_num],
&stm32f4_clk_lock);
if (post_div->idx != NO_IDX)
clks[post_div->idx] = hw;
}
sys_parents[1] = hse_clk;
clks[CLK_SYSCLK] = clk_hw_register_mux_table(
NULL, "sys", sys_parents, ARRAY_SIZE(sys_parents), 0,
base + STM32F4_RCC_CFGR, 0, 3, 0, NULL, &stm32f4_clk_lock);
clk_register_divider_table(NULL, "ahb_div", "sys",
CLK_SET_RATE_PARENT, base + STM32F4_RCC_CFGR,
4, 4, 0, ahb_div_table, &stm32f4_clk_lock);
clk_register_divider_table(NULL, "apb1_div", "ahb_div",
CLK_SET_RATE_PARENT, base + STM32F4_RCC_CFGR,
10, 3, 0, apb_div_table, &stm32f4_clk_lock);
clk_register_apb_mul(NULL, "apb1_mul", "apb1_div",
CLK_SET_RATE_PARENT, 12);
clk_register_divider_table(NULL, "apb2_div", "ahb_div",
CLK_SET_RATE_PARENT, base + STM32F4_RCC_CFGR,
13, 3, 0, apb_div_table, &stm32f4_clk_lock);
clk_register_apb_mul(NULL, "apb2_mul", "apb2_div",
CLK_SET_RATE_PARENT, 15);
clks[SYSTICK] = clk_hw_register_fixed_factor(NULL, "systick", "ahb_div",
0, 1, 8);
clks[FCLK] = clk_hw_register_fixed_factor(NULL, "fclk", "ahb_div",
0, 1, 1);
for (n = 0; n < data->gates_num; n++) {
const struct stm32f4_gate_data *gd;
unsigned int secondary;
int idx;
gd = &data->gates_data[n];
secondary = 8 * (gd->offset - STM32F4_RCC_AHB1ENR) +
gd->bit_idx;
idx = stm32f4_rcc_lookup_clk_idx(0, secondary);
if (idx < 0)
goto fail;
clks[idx] = clk_hw_register_gate(
NULL, gd->name, gd->parent_name, gd->flags,
base + gd->offset, gd->bit_idx, 0, &stm32f4_clk_lock);
if (IS_ERR(clks[idx])) {
pr_err("%s: Unable to register leaf clock %s\n",
np->full_name, gd->name);
goto fail;
}
}
clks[CLK_LSI] = clk_register_rgate(NULL, "lsi", "clk-lsi", 0,
base + STM32F4_RCC_CSR, 0, 1, 0, &stm32f4_clk_lock);
if (IS_ERR(clks[CLK_LSI])) {
pr_err("Unable to register lsi clock\n");
goto fail;
}
clks[CLK_LSE] = clk_register_rgate(NULL, "lse", "clk-lse", 0,
base + STM32F4_RCC_BDCR, 0, 1, 0, &stm32f4_clk_lock);
if (IS_ERR(clks[CLK_LSE])) {
pr_err("Unable to register lse clock\n");
goto fail;
}
clks[CLK_HSE_RTC] = clk_hw_register_divider(NULL, "hse-rtc", "clk-hse",
0, base + STM32F4_RCC_CFGR, 16, 5, 0,
&stm32f4_clk_lock);
if (IS_ERR(clks[CLK_HSE_RTC])) {
pr_err("Unable to register hse-rtc clock\n");
goto fail;
}
clks[CLK_RTC] = stm32_register_cclk(NULL, "rtc", rtc_parents, 4,
base + STM32F4_RCC_BDCR, 15, 8, 0, &stm32f4_clk_lock);
if (IS_ERR(clks[CLK_RTC])) {
pr_err("Unable to register rtc clock\n");
goto fail;
}
for (n = 0; n < data->aux_clk_num; n++) {
const struct stm32_aux_clk *aux_clk;
struct clk_hw *hw;
aux_clk = &data->aux_clk[n];
hw = stm32_register_aux_clk(aux_clk->name,
aux_clk->parent_names, aux_clk->num_parents,
aux_clk->offset_mux, aux_clk->shift,
aux_clk->mask, aux_clk->offset_gate,
aux_clk->bit_idx, aux_clk->flags,
&stm32f4_clk_lock);
if (IS_ERR(hw)) {
pr_warn("Unable to register %s clk\n", aux_clk->name);
continue;
}
if (aux_clk->idx != NO_IDX)
clks[aux_clk->idx] = hw;
}
if (of_device_is_compatible(np, "st,stm32f746-rcc"))
clk_hw_register_fixed_factor(NULL, "hsi_div488", "hsi", 0,
1, 488);
of_clk_add_hw_provider(np, stm32f4_rcc_lookup_clk, NULL);
return;
fail:
kfree(clks);
iounmap(base);
}
CLK_OF_DECLARE_DRIVER(stm32f42xx_rcc, "st,stm32f42xx-rcc", stm32f4_rcc_init);
CLK_OF_DECLARE_DRIVER(stm32f46xx_rcc, "st,stm32f469-rcc", stm32f4_rcc_init);
CLK_OF_DECLARE_DRIVER(stm32f746_rcc, "st,stm32f746-rcc", stm32f4_rcc_init);
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