diff options
| -rw-r--r-- | drivers/reset/Kconfig | 2 | ||||
| -rw-r--r-- | drivers/reset/stm32-reset.c | 36 |
2 files changed, 31 insertions, 7 deletions
diff --git a/drivers/reset/Kconfig b/drivers/reset/Kconfig index 3964b9eb6e..71a786bab5 100644 --- a/drivers/reset/Kconfig +++ b/drivers/reset/Kconfig @@ -30,7 +30,7 @@ config STI_RESET config STM32_RESET bool "Enable the STM32 reset" - depends on STM32 + depends on STM32 || ARCH_STM32MP help Support for reset controllers on STMicroelectronics STM32 family SoCs. This resset driver is compatible with STM32 F4/F7 and H7 SoCs. diff --git a/drivers/reset/stm32-reset.c b/drivers/reset/stm32-reset.c index b266f46263..e98f34b037 100644 --- a/drivers/reset/stm32-reset.c +++ b/drivers/reset/stm32-reset.c @@ -11,7 +11,13 @@ #include <reset-uclass.h> #include <asm/io.h> -DECLARE_GLOBAL_DATA_PTR; +/* reset clear offset for STM32MP RCC */ +#define RCC_CL 0x4 + +enum rcc_type { + RCC_STM32 = 0, + RCC_STM32MP, +}; struct stm32_reset_priv { fdt_addr_t base; @@ -35,7 +41,11 @@ static int stm32_reset_assert(struct reset_ctl *reset_ctl) debug("%s: reset id = %ld bank = %d offset = %d)\n", __func__, reset_ctl->id, bank, offset); - setbits_le32(priv->base + bank, BIT(offset)); + if (dev_get_driver_data(reset_ctl->dev) == RCC_STM32MP) + /* reset assert is done in rcc set register */ + writel(BIT(offset), priv->base + bank); + else + setbits_le32(priv->base + bank, BIT(offset)); return 0; } @@ -48,7 +58,11 @@ static int stm32_reset_deassert(struct reset_ctl *reset_ctl) debug("%s: reset id = %ld bank = %d offset = %d)\n", __func__, reset_ctl->id, bank, offset); - clrbits_le32(priv->base + bank, BIT(offset)); + if (dev_get_driver_data(reset_ctl->dev) == RCC_STM32MP) + /* reset deassert is done in rcc clr register */ + writel(BIT(offset), priv->base + bank + RCC_CL); + else + clrbits_le32(priv->base + bank, BIT(offset)); return 0; } @@ -64,16 +78,26 @@ static int stm32_reset_probe(struct udevice *dev) { struct stm32_reset_priv *priv = dev_get_priv(dev); - priv->base = devfdt_get_addr(dev); - if (priv->base == FDT_ADDR_T_NONE) - return -EINVAL; + priv->base = dev_read_addr(dev); + if (priv->base == FDT_ADDR_T_NONE) { + /* for MFD, get address of parent */ + priv->base = dev_read_addr(dev->parent); + if (priv->base == FDT_ADDR_T_NONE) + return -EINVAL; + } return 0; } +static const struct udevice_id stm32_reset_ids[] = { + { .compatible = "st,stm32mp1-rcc-rst", .data = RCC_STM32MP }, + { } +}; + U_BOOT_DRIVER(stm32_rcc_reset) = { .name = "stm32_rcc_reset", .id = UCLASS_RESET, + .of_match = stm32_reset_ids, .probe = stm32_reset_probe, .priv_auto_alloc_size = sizeof(struct stm32_reset_priv), .ops = &stm32_reset_ops, |