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board: stm32f429-disco: switch to DM STM32 clock driver

Browse source 
Use available DM clk_stm32f.c driver instead of dedicated
mach-stm32/stm32f4/clock.c.

Migrate periph_clock defines from stm32_periph.h directly in
CLK driver. These periph_clock defines will be removed when STMMAC,
TIMER2 and SYSCFG drivers will support DM CLK.

Enable also CLK flag.

Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
This commit is contained in:
Patrice Chotard 2017-12-12 09:49:39 +01:00 committed by Tom Rini
parent dcb11959d8
commit 4a56fd484a
6 changed files with 9 additions and 300 deletions
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17
arch/arm/include/asm/arch-stm32f4/stm32.h
View file

@ -42,11 +42,6 @@ struct stm32_u_id_regs {
u32 u_id_high;
};
struct stm32_pwr_regs {
u32 cr;
u32 csr;
};
/*
* Registers access macros
*/
@ -56,9 +51,6 @@ struct stm32_pwr_regs {
#define STM32_RCC_BASE (STM32_AHB1PERIPH_BASE + 0x3800)
#define STM32_RCC ((struct stm32_rcc_regs *)STM32_RCC_BASE)
#define STM32_PWR_BASE (STM32_APB1PERIPH_BASE + 0x7000)
#define STM32_PWR ((struct stm32_pwr_regs *)STM32_PWR_BASE)
#define FLASH_CNTL_BASE (STM32_AHB1PERIPH_BASE + 0x3C00)
static const u32 sect_sz_kb[CONFIG_SYS_MAX_FLASH_SECT] = {
@ -67,15 +59,6 @@ static const u32 sect_sz_kb[CONFIG_SYS_MAX_FLASH_SECT] = {
[5 ... 11] = 128 * 1024
};
enum clock {
CLOCK_CORE,
CLOCK_AHB,
CLOCK_APB1,
CLOCK_APB2
};
int configure_clocks(void);
unsigned long clock_get(enum clock clck);
void stm32_flash_latency_cfg(int latency);
#endif /* _MACH_STM32_H_ */

2
arch/arm/mach-stm32/stm32f4/Makefile
View file

@ -8,4 +8,4 @@
# SPDX-License-Identifier: GPL-2.0+
#
obj-y += clock.o timer.o
obj-y += timer.o

258
arch/arm/mach-stm32/stm32f4/clock.c
View file

@ -1,258 +0,0 @@
/*
* (C) Copyright 2015
* Kamil Lulko, <kamil.lulko@gmail.com>
*
* (C) Copyright 2014
* STMicroelectronics
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <stm32_rcc.h>
#include <asm/io.h>
#include <asm/arch/stm32.h>
#include <asm/arch/stm32_periph.h>
#define RCC_CR_HSION (1 << 0)
#define RCC_CR_HSEON (1 << 16)
#define RCC_CR_HSERDY (1 << 17)
#define RCC_CR_HSEBYP (1 << 18)
#define RCC_CR_CSSON (1 << 19)
#define RCC_CR_PLLON (1 << 24)
#define RCC_CR_PLLRDY (1 << 25)
#define RCC_PLLCFGR_PLLM_MASK 0x3F
#define RCC_PLLCFGR_PLLN_MASK 0x7FC0
#define RCC_PLLCFGR_PLLP_MASK 0x30000
#define RCC_PLLCFGR_PLLQ_MASK 0xF000000
#define RCC_PLLCFGR_PLLSRC (1 << 22)
#define RCC_PLLCFGR_PLLN_SHIFT 6
#define RCC_PLLCFGR_PLLP_SHIFT 16
#define RCC_PLLCFGR_PLLQ_SHIFT 24
#define RCC_CFGR_AHB_PSC_MASK 0xF0
#define RCC_CFGR_APB1_PSC_MASK 0x1C00
#define RCC_CFGR_APB2_PSC_MASK 0xE000
#define RCC_CFGR_SW0 (1 << 0)
#define RCC_CFGR_SW1 (1 << 1)
#define RCC_CFGR_SW_MASK 0x3
#define RCC_CFGR_SW_HSI 0
#define RCC_CFGR_SW_HSE RCC_CFGR_SW0
#define RCC_CFGR_SW_PLL RCC_CFGR_SW1
#define RCC_CFGR_SWS0 (1 << 2)
#define RCC_CFGR_SWS1 (1 << 3)
#define RCC_CFGR_SWS_MASK 0xC
#define RCC_CFGR_SWS_HSI 0
#define RCC_CFGR_SWS_HSE RCC_CFGR_SWS0
#define RCC_CFGR_SWS_PLL RCC_CFGR_SWS1
#define RCC_CFGR_HPRE_SHIFT 4
#define RCC_CFGR_PPRE1_SHIFT 10
#define RCC_CFGR_PPRE2_SHIFT 13
#define RCC_APB1ENR_PWREN (1 << 28)
/*
* RCC USART specific definitions
*/
#define RCC_ENR_USART1EN (1 << 4)
#define RCC_ENR_USART2EN (1 << 17)
#define RCC_ENR_USART3EN (1 << 18)
#define RCC_ENR_USART6EN (1 << 5)
#define PWR_CR_VOS0 (1 << 14)
#define PWR_CR_VOS1 (1 << 15)
#define PWR_CR_VOS_MASK 0xC000
#define PWR_CR_VOS_SCALE_MODE_1 (PWR_CR_VOS0 | PWR_CR_VOS1)
#define PWR_CR_VOS_SCALE_MODE_2 (PWR_CR_VOS1)
#define PWR_CR_VOS_SCALE_MODE_3 (PWR_CR_VOS0)
/*
* RCC GPIO specific definitions
*/
#define RCC_ENR_GPIO_A_EN (1 << 0)
#define RCC_ENR_GPIO_B_EN (1 << 1)
#define RCC_ENR_GPIO_C_EN (1 << 2)
#define RCC_ENR_GPIO_D_EN (1 << 3)
#define RCC_ENR_GPIO_E_EN (1 << 4)
#define RCC_ENR_GPIO_F_EN (1 << 5)
#define RCC_ENR_GPIO_G_EN (1 << 6)
#define RCC_ENR_GPIO_H_EN (1 << 7)
#define RCC_ENR_GPIO_I_EN (1 << 8)
#define RCC_ENR_GPIO_J_EN (1 << 9)
#define RCC_ENR_GPIO_K_EN (1 << 10)
#if !defined(CONFIG_STM32_HSE_HZ)
#error "CONFIG_STM32_HSE_HZ not defined!"
#else
#if (CONFIG_STM32_HSE_HZ == 8000000)
#if (CONFIG_SYS_CLK_FREQ == 180000000)
/* 180 MHz */
struct pll_psc sys_pll_psc = {
.pll_m = 8,
.pll_n = 360,
.pll_p = 2,
.pll_q = 8,
.ahb_psc = AHB_PSC_1,
.apb1_psc = APB_PSC_4,
.apb2_psc = APB_PSC_2
};
#else
/* default 168 MHz */
struct pll_psc sys_pll_psc = {
.pll_m = 8,
.pll_n = 336,
.pll_p = 2,
.pll_q = 7,
.ahb_psc = AHB_PSC_1,
.apb1_psc = APB_PSC_4,
.apb2_psc = APB_PSC_2
};
#endif
#else
#error "No PLL/Prescaler configuration for given CONFIG_STM32_HSE_HZ exists"
#endif
#endif
int configure_clocks(void)
{
/* Reset RCC configuration */
setbits_le32(&STM32_RCC->cr, RCC_CR_HSION);
writel(0, &STM32_RCC->cfgr); /* Reset CFGR */
clrbits_le32(&STM32_RCC->cr, (RCC_CR_HSEON | RCC_CR_CSSON
| RCC_CR_PLLON));
writel(0x24003010, &STM32_RCC->pllcfgr); /* Reset value from RM */
clrbits_le32(&STM32_RCC->cr, RCC_CR_HSEBYP);
writel(0, &STM32_RCC->cir); /* Disable all interrupts */
/* Configure for HSE+PLL operation */
setbits_le32(&STM32_RCC->cr, RCC_CR_HSEON);
while (!(readl(&STM32_RCC->cr) & RCC_CR_HSERDY))
;
/* Enable high performance mode, System frequency up to 180 MHz */
setbits_le32(&STM32_RCC->apb1enr, RCC_APB1ENR_PWREN);
writel(PWR_CR_VOS_SCALE_MODE_1, &STM32_PWR->cr);
setbits_le32(&STM32_RCC->cfgr, ((
sys_pll_psc.ahb_psc << RCC_CFGR_HPRE_SHIFT)
| (sys_pll_psc.apb1_psc << RCC_CFGR_PPRE1_SHIFT)
| (sys_pll_psc.apb2_psc << RCC_CFGR_PPRE2_SHIFT)));
writel(sys_pll_psc.pll_m
| (sys_pll_psc.pll_n << RCC_PLLCFGR_PLLN_SHIFT)
| (((sys_pll_psc.pll_p >> 1) - 1) << RCC_PLLCFGR_PLLP_SHIFT)
| (sys_pll_psc.pll_q << RCC_PLLCFGR_PLLQ_SHIFT),
&STM32_RCC->pllcfgr);
setbits_le32(&STM32_RCC->pllcfgr, RCC_PLLCFGR_PLLSRC);
setbits_le32(&STM32_RCC->cr, RCC_CR_PLLON);
while (!(readl(&STM32_RCC->cr) & RCC_CR_PLLRDY))
;
stm32_flash_latency_cfg(5);
clrbits_le32(&STM32_RCC->cfgr, (RCC_CFGR_SW0 | RCC_CFGR_SW1));
setbits_le32(&STM32_RCC->cfgr, RCC_CFGR_SW_PLL);
while ((readl(&STM32_RCC->cfgr) & RCC_CFGR_SWS_MASK) !=
RCC_CFGR_SWS_PLL)
;
return 0;
}
unsigned long clock_get(enum clock clck)
{
u32 sysclk = 0;
u32 shift = 0;
/* Prescaler table lookups for clock computation */
u8 ahb_psc_table[16] = {
0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 3, 4, 6, 7, 8, 9
};
u8 apb_psc_table[8] = {
0, 0, 0, 0, 1, 2, 3, 4
};
if ((readl(&STM32_RCC->cfgr) & RCC_CFGR_SWS_MASK) ==
RCC_CFGR_SWS_PLL) {
u16 pllm, plln, pllp;
pllm = (readl(&STM32_RCC->pllcfgr) & RCC_PLLCFGR_PLLM_MASK);
plln = ((readl(&STM32_RCC->pllcfgr) & RCC_PLLCFGR_PLLN_MASK)
>> RCC_PLLCFGR_PLLN_SHIFT);
pllp = ((((readl(&STM32_RCC->pllcfgr) & RCC_PLLCFGR_PLLP_MASK)
>> RCC_PLLCFGR_PLLP_SHIFT) + 1) << 1);
sysclk = ((CONFIG_STM32_HSE_HZ / pllm) * plln) / pllp;
}
switch (clck) {
case CLOCK_CORE:
return sysclk;
break;
case CLOCK_AHB:
shift = ahb_psc_table[(
(readl(&STM32_RCC->cfgr) & RCC_CFGR_AHB_PSC_MASK)
>> RCC_CFGR_HPRE_SHIFT)];
return sysclk >>= shift;
break;
case CLOCK_APB1:
shift = apb_psc_table[(
(readl(&STM32_RCC->cfgr) & RCC_CFGR_APB1_PSC_MASK)
>> RCC_CFGR_PPRE1_SHIFT)];
return sysclk >>= shift;
break;
case CLOCK_APB2:
shift = apb_psc_table[(
(readl(&STM32_RCC->cfgr) & RCC_CFGR_APB2_PSC_MASK)
>> RCC_CFGR_PPRE2_SHIFT)];
return sysclk >>= shift;
break;
default:
return 0;
break;
}
}
void clock_setup(int peripheral)
{
switch (peripheral) {
case USART1_CLOCK_CFG:
setbits_le32(&STM32_RCC->apb2enr, RCC_ENR_USART1EN);
break;
case GPIO_A_CLOCK_CFG:
setbits_le32(&STM32_RCC->ahb1enr, RCC_ENR_GPIO_A_EN);
break;
case GPIO_B_CLOCK_CFG:
setbits_le32(&STM32_RCC->ahb1enr, RCC_ENR_GPIO_B_EN);
break;
case GPIO_C_CLOCK_CFG:
setbits_le32(&STM32_RCC->ahb1enr, RCC_ENR_GPIO_C_EN);
break;
case GPIO_D_CLOCK_CFG:
setbits_le32(&STM32_RCC->ahb1enr, RCC_ENR_GPIO_D_EN);
break;
case GPIO_E_CLOCK_CFG:
setbits_le32(&STM32_RCC->ahb1enr, RCC_ENR_GPIO_E_EN);
break;
case GPIO_F_CLOCK_CFG:
setbits_le32(&STM32_RCC->ahb1enr, RCC_ENR_GPIO_F_EN);
break;
case GPIO_G_CLOCK_CFG:
setbits_le32(&STM32_RCC->ahb1enr, RCC_ENR_GPIO_G_EN);
break;
case GPIO_H_CLOCK_CFG:
setbits_le32(&STM32_RCC->ahb1enr, RCC_ENR_GPIO_H_EN);
break;
case GPIO_I_CLOCK_CFG:
setbits_le32(&STM32_RCC->ahb1enr, RCC_ENR_GPIO_I_EN);
break;
case GPIO_J_CLOCK_CFG:
setbits_le32(&STM32_RCC->ahb1enr, RCC_ENR_GPIO_J_EN);
break;
case GPIO_K_CLOCK_CFG:
setbits_le32(&STM32_RCC->ahb1enr, RCC_ENR_GPIO_K_EN);
break;
default:
break;
}
}

24
board/st/stm32f429-discovery/stm32f429-discovery.c
View file

@ -13,12 +13,10 @@
#include <common.h>
#include <dm.h>
#include <stm32_rcc.h>
#include <asm/io.h>
#include <asm/arch/stm32.h>
#include <asm/arch/gpio.h>
#include <asm/arch/stm32_periph.h>
#include <asm/arch/stm32_defs.h>
DECLARE_GLOBAL_DATA_PTR;
@ -48,7 +46,6 @@ int uart_setup_gpio(void)
int i;
int rv = 0;
clock_setup(GPIO_A_CLOCK_CFG);
for (i = 0; i < ARRAY_SIZE(usart_gpio); i++) {
rv = stm32_gpio_config(&usart_gpio[i], &gpio_ctl_usart);
if (rv)
@ -114,13 +111,6 @@ static int fmc_setup_gpio(void)
int rv = 0;
int i;
clock_setup(GPIO_B_CLOCK_CFG);
clock_setup(GPIO_C_CLOCK_CFG);
clock_setup(GPIO_D_CLOCK_CFG);
clock_setup(GPIO_E_CLOCK_CFG);
clock_setup(GPIO_F_CLOCK_CFG);
clock_setup(GPIO_G_CLOCK_CFG);
for (i = 0; i < ARRAY_SIZE(ext_ram_fmc_gpio); i++) {
rv = stm32_gpio_config(&ext_ram_fmc_gpio[i],
&gpio_ctl_fmc);
@ -132,11 +122,6 @@ out:
return rv;
}
/*
* STM32 RCC FMC specific definitions
*/
#define STM32_RCC_ENR_FMC (1 << 0) /* FMC module clock */
int dram_init(void)
{
int rv;
@ -145,9 +130,6 @@ int dram_init(void)
rv = fmc_setup_gpio();
if (rv)
return rv;
setbits_le32(&STM32_RCC->ahb3enr, STM32_RCC_ENR_FMC);
rv = uclass_get_device(UCLASS_RAM, 0, &dev);
if (rv) {
debug("DRAM init failed: %d\n", rv);
@ -176,13 +158,9 @@ int board_early_init_f(void)
{
int res;
configure_clocks();
res = uart_setup_gpio();
if (res)
return res;
clock_setup(USART1_CLOCK_CFG);
return 0;
}

1
configs/stm32f429-discovery_defconfig
View file

@ -19,6 +19,7 @@ CONFIG_CMD_TIMER=y
CONFIG_OF_CONTROL=y
CONFIG_OF_EMBED=y
CONFIG_ENV_IS_IN_FLASH=y
CONFIG_CLK=y
CONFIG_MISC=y
CONFIG_STM32_RCC=y
# CONFIG_MMC is not set

7
drivers/clk/clk_stm32f.c
View file

@ -12,7 +12,6 @@
#include <asm/io.h>
#include <asm/arch/stm32.h>
#include <asm/arch/stm32_periph.h>
#include <asm/arch/stm32_pwr.h>
#include <dt-bindings/mfd/stm32f7-rcc.h>
@ -88,6 +87,12 @@
*/
#define RCC_APB2ENR_SYSCFGEN BIT(14)
enum periph_clock {
SYSCFG_CLOCK_CFG,
TIMER2_CLOCK_CFG,
STMMAC_CLOCK_CFG,
};
struct stm32_clk_info stm32f4_clk_info = {
/* 180 MHz */
.sys_pll_psc = {