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ufs: rockchip: Add device reset support

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Wire up the GPIO line which Rockchip RK3576 UFS controller uses to reset
the connected UFS device.

This seems necessary at least for some UFS modules and fixes the following
error while enumerating UFS storage:

ufshcd-rockchip ufshc@2a2d0000: ufshcd_link_startup: Device not present
ufshcd-rockchip ufshc@2a2d0000: link startup failed -6
ufshcd-rockchip ufshc@2a2d0000: ufshcd_pltfrm_init() failed -6

Note that the GPIO descriptor for device resets is already required by the
DT binding (link enclosed).

Link: https://elixir.bootlin.com/linux/v6.18.5/source/Documentation/devicetree/bindings/ufs/rockchip,rk3576-ufshc.yaml#L70
Fixes: 76465ce21e ("ufs: rockchip: Add initial support")
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Reviewed-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Alexey Charkov <alchark@gmail.com>
Link: https://patch.msgid.link/20260120-rk3576-ufs-v5-3-0edb61b301b7@gmail.com
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
This commit is contained in:
Alexey Charkov
2026-01-20 22:09:04 +04:00
committed by Neil Armstrong
parent c664b4d5f3
commit 67d8731d4a
3 changed files with 27 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/ufs/Kconfig
View File

@@ -76,6 +76,10 @@ config UFS_RENESAS_GEN5
config UFS_ROCKCHIP
bool "Rockchip specific hooks to UFS controller platform driver"
depends on UFS
depends on DM_GPIO
depends on RESET_ROCKCHIP
depends on SPL_DM_GPIO || !SPL_UFS_SUPPORT
depends on SPL_RESET_ROCKCHIP || !SPL_UFS_SUPPORT
help
This selects the Rockchip specific additions to UFSHCD platform driver.

22
drivers/ufs/ufs-rockchip.c
View File

@@ -5,6 +5,7 @@
* Copyright (C) 2025 Rockchip Electronics Co.Ltd.
*/
#include <asm/gpio.h>
#include <asm/io.h>
#include <clk.h>
#include <dm.h>
@@ -150,11 +151,31 @@ static int ufs_rockchip_common_init(struct ufs_hba *hba)
return err;
}
err = gpio_request_by_name(dev, "reset-gpios", 0, &host->device_reset,
GPIOD_IS_OUT | GPIOD_ACTIVE_LOW);
if (err) {
dev_err(dev, "Cannot get reset GPIO\n");
return err;
}
host->hba = hba;
return 0;
}
static int ufs_rockchip_device_reset(struct ufs_hba *hba)
{
struct ufs_rockchip_host *host = dev_get_priv(hba->dev);
dm_gpio_set_value(&host->device_reset, true);
udelay(20);
dm_gpio_set_value(&host->device_reset, false);
udelay(20);
return 0;
}
static int ufs_rockchip_rk3576_init(struct ufs_hba *hba)
{
int ret = 0;
@@ -172,6 +193,7 @@ static struct ufs_hba_ops ufs_hba_rk3576_vops = {
.init = ufs_rockchip_rk3576_init,
.phy_initialization = ufs_rockchip_rk3576_phy_init,
.hce_enable_notify = ufs_rockchip_hce_enable_notify,
.device_reset = ufs_rockchip_device_reset,
};
static const struct udevice_id ufs_rockchip_of_match[] = {

1
drivers/ufs/ufs-rockchip.h
View File

@@ -72,6 +72,7 @@ struct ufs_rockchip_host {
void __iomem *ufs_sys_ctrl;
void __iomem *mphy_base;
struct reset_ctl_bulk rsts;
struct gpio_desc device_reset;
struct clk ref_out_clk;
uint64_t caps;
uint32_t phy_config_mode;