mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-25 22:20:45 +00:00
ad0e804843
When a driver declares DM_FLAG_PRE_RELOC flag, it wishes to be bound before relocation. However due to a bug in the DM core, the flag only takes effect when devices are statically declared via U_BOOT_DEVICE(). This bug has been fixed recently by commit "dm: core: Respect drivers with the DM_FLAG_PRE_RELOC flag in lists_bind_fdt()", but with the fix, it has a side effect that all existing drivers that declared DM_FLAG_PRE_RELOC flag will be bound before relocation now. This may expose potential boot failure on some boards due to insufficient memory during the pre-relocation stage. To mitigate this potential impact, the following changes are implemented: - Remove DM_FLAG_PRE_RELOC flag in the driver, if the driver only supports configuration from device tree (OF_CONTROL) - Keep DM_FLAG_PRE_RELOC flag in the driver only if the device is statically declared via U_BOOT_DEVICE() - Surround DM_FLAG_PRE_RELOC flag with OF_CONTROL check, for drivers that support both statically declared devices and configuration from device tree Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Simon Glass <sjg@chromium.org>
116 lines
3 KiB
C
116 lines
3 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Exynos7420 pinctrl driver.
|
|
* Copyright (C) 2016 Samsung Electronics
|
|
* Thomas Abraham <thomas.ab@samsung.com>
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <dm.h>
|
|
#include <errno.h>
|
|
#include <asm/io.h>
|
|
#include <dm/pinctrl.h>
|
|
#include <dm/root.h>
|
|
#include <fdtdec.h>
|
|
#include <asm/arch/pinmux.h>
|
|
#include "pinctrl-exynos.h"
|
|
|
|
#define GPD1_OFFSET 0xc0
|
|
|
|
static struct exynos_pinctrl_config_data serial2_conf[] = {
|
|
{
|
|
.offset = GPD1_OFFSET + PIN_CON,
|
|
.mask = 0x00ff0000,
|
|
.value = 0x00220000,
|
|
}, {
|
|
.offset = GPD1_OFFSET + PIN_PUD,
|
|
.mask = 0x00000f00,
|
|
.value = 0x00000f00,
|
|
},
|
|
};
|
|
|
|
static int exynos7420_pinctrl_request(struct udevice *dev, int peripheral,
|
|
int flags)
|
|
{
|
|
struct exynos_pinctrl_priv *priv = dev_get_priv(dev);
|
|
unsigned long base = priv->base;
|
|
|
|
switch (PERIPH_ID_UART2) {
|
|
case PERIPH_ID_UART2:
|
|
exynos_pinctrl_setup_peri(serial2_conf,
|
|
ARRAY_SIZE(serial2_conf), base);
|
|
break;
|
|
default:
|
|
return -ENODEV;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct pinctrl_ops exynos7420_pinctrl_ops = {
|
|
.set_state = exynos_pinctrl_set_state,
|
|
.request = exynos7420_pinctrl_request,
|
|
};
|
|
|
|
/* pin banks of Exynos7420 pin-controller - BUS0 */
|
|
static const struct samsung_pin_bank_data exynos7420_pin_banks0[] = {
|
|
EXYNOS_PIN_BANK(5, 0x000, "gpb0"),
|
|
EXYNOS_PIN_BANK(8, 0x020, "gpc0"),
|
|
EXYNOS_PIN_BANK(2, 0x040, "gpc1"),
|
|
EXYNOS_PIN_BANK(6, 0x060, "gpc2"),
|
|
EXYNOS_PIN_BANK(8, 0x080, "gpc3"),
|
|
EXYNOS_PIN_BANK(4, 0x0a0, "gpd0"),
|
|
EXYNOS_PIN_BANK(6, 0x0c0, "gpd1"),
|
|
EXYNOS_PIN_BANK(8, 0x0e0, "gpd2"),
|
|
EXYNOS_PIN_BANK(5, 0x100, "gpd4"),
|
|
EXYNOS_PIN_BANK(4, 0x120, "gpd5"),
|
|
EXYNOS_PIN_BANK(6, 0x140, "gpd6"),
|
|
EXYNOS_PIN_BANK(3, 0x160, "gpd7"),
|
|
EXYNOS_PIN_BANK(2, 0x180, "gpd8"),
|
|
EXYNOS_PIN_BANK(2, 0x1a0, "gpg0"),
|
|
EXYNOS_PIN_BANK(4, 0x1c0, "gpg3"),
|
|
};
|
|
|
|
/* pin banks of Exynos7420 pin-controller - FSYS0 */
|
|
static const struct samsung_pin_bank_data exynos7420_pin_banks1[] = {
|
|
EXYNOS_PIN_BANK(7, 0x000, "gpr4"),
|
|
};
|
|
|
|
/* pin banks of Exynos7420 pin-controller - FSYS1 */
|
|
static const struct samsung_pin_bank_data exynos7420_pin_banks2[] = {
|
|
EXYNOS_PIN_BANK(4, 0x000, "gpr0"),
|
|
EXYNOS_PIN_BANK(8, 0x020, "gpr1"),
|
|
EXYNOS_PIN_BANK(5, 0x040, "gpr2"),
|
|
EXYNOS_PIN_BANK(8, 0x060, "gpr3"),
|
|
};
|
|
|
|
const struct samsung_pin_ctrl exynos7420_pin_ctrl[] = {
|
|
{
|
|
/* pin-controller instance BUS0 data */
|
|
.pin_banks = exynos7420_pin_banks0,
|
|
.nr_banks = ARRAY_SIZE(exynos7420_pin_banks0),
|
|
}, {
|
|
/* pin-controller instance FSYS0 data */
|
|
.pin_banks = exynos7420_pin_banks1,
|
|
.nr_banks = ARRAY_SIZE(exynos7420_pin_banks1),
|
|
}, {
|
|
/* pin-controller instance FSYS1 data */
|
|
.pin_banks = exynos7420_pin_banks2,
|
|
.nr_banks = ARRAY_SIZE(exynos7420_pin_banks2),
|
|
},
|
|
};
|
|
|
|
static const struct udevice_id exynos7420_pinctrl_ids[] = {
|
|
{ .compatible = "samsung,exynos7420-pinctrl",
|
|
.data = (ulong)exynos7420_pin_ctrl },
|
|
{ }
|
|
};
|
|
|
|
U_BOOT_DRIVER(pinctrl_exynos7420) = {
|
|
.name = "pinctrl_exynos7420",
|
|
.id = UCLASS_PINCTRL,
|
|
.of_match = exynos7420_pinctrl_ids,
|
|
.priv_auto_alloc_size = sizeof(struct exynos_pinctrl_priv),
|
|
.ops = &exynos7420_pinctrl_ops,
|
|
.probe = exynos_pinctrl_probe,
|
|
};
|