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misc: stm32: Add STM32MP1 support

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Following next kernel rcc bindings, we must use a MFD
RCC driver which is able to bind both clock and reset
drivers.

We can reuse and adapt RCC MFD driver already available
for MCU SoCs (F4/F7/H7).

Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
This commit is contained in:
Patrick Delaunay
2018-07-09 15:17:20 +02:00
committed by Tom Rini
parent a674313c2c
commit d090cbab64
6 changed files with 21 additions and 24 deletions
Download Patch File Download Diff File Expand all files Collapse all files

16
drivers/reset/stm32-reset.c
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@@ -8,16 +8,12 @@
#include <dm.h>
#include <errno.h>
#include <reset-uclass.h>
#include <stm32_rcc.h>
#include <asm/io.h>
/* 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;
};
@@ -40,7 +36,7 @@ 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);
if (dev_get_driver_data(reset_ctl->dev) == RCC_STM32MP)
if (dev_get_driver_data(reset_ctl->dev) == STM32MP1)
/* reset assert is done in rcc set register */
writel(BIT(offset), priv->base + bank);
else
@@ -57,7 +53,7 @@ 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);
if (dev_get_driver_data(reset_ctl->dev) == RCC_STM32MP)
if (dev_get_driver_data(reset_ctl->dev) == STM32MP1)
/* reset deassert is done in rcc clr register */
writel(BIT(offset), priv->base + bank + RCC_CL);
else
@@ -88,15 +84,9 @@ static int stm32_reset_probe(struct udevice *dev)
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,