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Message-Id: <20220920103108.23074-11-jay.xu@rock-chips.com>
Date: Tue, 20 Sep 2022 18:30:58 +0800
From: Jianqun Xu <jay.xu@...k-chips.com>
To: linus.walleij@...aro.org, heiko@...ech.de, brgl@...ev.pl,
andriy.shevchenko@...ux.intel.com
Cc: robert.moore@...el.com, robh@...nel.org,
linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org,
lenb@...nel.org, rafael@...nel.org,
Jianqun Xu <jay.xu@...k-chips.com>
Subject: [PATCH 10/20] gpio/rockchip: revert deferred output settings on probe
This patch revert 3 patches:
Revert "gpio/rockchip: handle deferring input-enable pinconfs"
This reverts commit 7ff11357810fd124825fdd9aaf0df90262b77844.
Revert "pinctrl/rockchip: support deferring other gpio params"
This reverts commit 8ce5ef64546850294b021497046588a7abcebe96.
Revert "gpio/rockchip: fetch deferred output settings on probe"
This reverts commit 59dd178e1d7cb6cac03b32aba7ed9bbce6761b6f.
A patch for pinctrl-rockchip must be applied to make sure the gpiochips
have been registered before the pinctrl to register.
---
drivers/gpio/gpio-rockchip.c | 35 -------------------
drivers/pinctrl/pinctrl-rockchip.c | 54 ++++++++++++++----------------
drivers/pinctrl/pinctrl-rockchip.h | 7 ++--
3 files changed, 27 insertions(+), 69 deletions(-)
diff --git a/drivers/gpio/gpio-rockchip.c b/drivers/gpio/gpio-rockchip.c
index dafcc8be1687..b294ef009daf 100644
--- a/drivers/gpio/gpio-rockchip.c
+++ b/drivers/gpio/gpio-rockchip.c
@@ -19,7 +19,6 @@
#include <linux/of_address.h>
#include <linux/of_device.h>
#include <linux/of_irq.h>
-#include <linux/pinctrl/pinconf-generic.h>
#include <linux/regmap.h>
#include "../pinctrl/core.h"
@@ -708,7 +707,6 @@ static int rockchip_gpio_probe(struct platform_device *pdev)
struct device_node *pctlnp = of_get_parent(np);
struct pinctrl_dev *pctldev = NULL;
struct rockchip_pin_bank *bank = NULL;
- struct rockchip_pin_deferred *cfg;
static int gpio;
int id, ret;
@@ -736,45 +734,12 @@ static int rockchip_gpio_probe(struct platform_device *pdev)
if (ret)
return ret;
- /*
- * Prevent clashes with a deferred output setting
- * being added right at this moment.
- */
- mutex_lock(&bank->deferred_lock);
-
ret = rockchip_gpiolib_register(bank);
if (ret) {
clk_disable_unprepare(bank->clk);
- mutex_unlock(&bank->deferred_lock);
return ret;
}
- while (!list_empty(&bank->deferred_pins)) {
- cfg = list_first_entry(&bank->deferred_pins,
- struct rockchip_pin_deferred, head);
- list_del(&cfg->head);
-
- switch (cfg->param) {
- case PIN_CONFIG_OUTPUT:
- ret = rockchip_gpio_direction_output(&bank->gpio_chip, cfg->pin, cfg->arg);
- if (ret)
- dev_warn(dev, "setting output pin %u to %u failed\n", cfg->pin,
- cfg->arg);
- break;
- case PIN_CONFIG_INPUT_ENABLE:
- ret = rockchip_gpio_direction_input(&bank->gpio_chip, cfg->pin);
- if (ret)
- dev_warn(dev, "setting input pin %u failed\n", cfg->pin);
- break;
- default:
- dev_warn(dev, "unknown deferred config param %d\n", cfg->param);
- break;
- }
- kfree(cfg);
- }
-
- mutex_unlock(&bank->deferred_lock);
-
platform_set_drvdata(pdev, bank);
dev_info(dev, "probed %pOF\n", np);
diff --git a/drivers/pinctrl/pinctrl-rockchip.c b/drivers/pinctrl/pinctrl-rockchip.c
index 801a1f6ca4db..97af52bb5481 100644
--- a/drivers/pinctrl/pinctrl-rockchip.c
+++ b/drivers/pinctrl/pinctrl-rockchip.c
@@ -2702,20 +2702,19 @@ static bool rockchip_pinconf_pull_valid(struct rockchip_pin_ctrl *ctrl,
return false;
}
-static int rockchip_pinconf_defer_pin(struct rockchip_pin_bank *bank,
- unsigned int pin, u32 param, u32 arg)
+static int rockchip_pinconf_defer_output(struct rockchip_pin_bank *bank,
+ unsigned int pin, u32 arg)
{
- struct rockchip_pin_deferred *cfg;
+ struct rockchip_pin_output_deferred *cfg;
cfg = kzalloc(sizeof(*cfg), GFP_KERNEL);
if (!cfg)
return -ENOMEM;
cfg->pin = pin;
- cfg->param = param;
cfg->arg = arg;
- list_add_tail(&cfg->head, &bank->deferred_pins);
+ list_add_tail(&cfg->head, &bank->deferred_output);
return 0;
}
@@ -2736,25 +2735,6 @@ static int rockchip_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin,
param = pinconf_to_config_param(configs[i]);
arg = pinconf_to_config_argument(configs[i]);
- if (param == PIN_CONFIG_OUTPUT || param == PIN_CONFIG_INPUT_ENABLE) {
- /*
- * Check for gpio driver not being probed yet.
- * The lock makes sure that either gpio-probe has completed
- * or the gpio driver hasn't probed yet.
- */
- mutex_lock(&bank->deferred_lock);
- if (!gpio || !gpio->direction_output) {
- rc = rockchip_pinconf_defer_pin(bank, pin - bank->pin_base, param,
- arg);
- mutex_unlock(&bank->deferred_lock);
- if (rc)
- return rc;
-
- break;
- }
- mutex_unlock(&bank->deferred_lock);
- }
-
switch (param) {
case PIN_CONFIG_BIAS_DISABLE:
rc = rockchip_set_pull(bank, pin - bank->pin_base,
@@ -2783,6 +2763,22 @@ static int rockchip_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin,
if (rc != RK_FUNC_GPIO)
return -EINVAL;
+ /*
+ * Check for gpio driver not being probed yet.
+ * The lock makes sure that either gpio-probe has completed
+ * or the gpio driver hasn't probed yet.
+ */
+ mutex_lock(&bank->deferred_lock);
+ if (!gpio || !gpio->direction_output) {
+ rc = rockchip_pinconf_defer_output(bank, pin - bank->pin_base, arg);
+ mutex_unlock(&bank->deferred_lock);
+ if (rc)
+ return rc;
+
+ break;
+ }
+ mutex_unlock(&bank->deferred_lock);
+
rc = gpio->direction_output(gpio, pin - bank->pin_base,
arg);
if (rc)
@@ -3109,7 +3105,7 @@ static int rockchip_pinctrl_register(struct platform_device *pdev,
pdesc++;
}
- INIT_LIST_HEAD(&pin_bank->deferred_pins);
+ INIT_LIST_HEAD(&pin_bank->deferred_output);
mutex_init(&pin_bank->deferred_lock);
}
@@ -3371,7 +3367,7 @@ static int rockchip_pinctrl_remove(struct platform_device *pdev)
{
struct rockchip_pinctrl *info = platform_get_drvdata(pdev);
struct rockchip_pin_bank *bank;
- struct rockchip_pin_deferred *cfg;
+ struct rockchip_pin_output_deferred *cfg;
int i;
of_platform_depopulate(&pdev->dev);
@@ -3380,9 +3376,9 @@ static int rockchip_pinctrl_remove(struct platform_device *pdev)
bank = &info->ctrl->pin_banks[i];
mutex_lock(&bank->deferred_lock);
- while (!list_empty(&bank->deferred_pins)) {
- cfg = list_first_entry(&bank->deferred_pins,
- struct rockchip_pin_deferred, head);
+ while (!list_empty(&bank->deferred_output)) {
+ cfg = list_first_entry(&bank->deferred_output,
+ struct rockchip_pin_output_deferred, head);
list_del(&cfg->head);
kfree(cfg);
}
diff --git a/drivers/pinctrl/pinctrl-rockchip.h b/drivers/pinctrl/pinctrl-rockchip.h
index 4759f336941e..3531633c0397 100644
--- a/drivers/pinctrl/pinctrl-rockchip.h
+++ b/drivers/pinctrl/pinctrl-rockchip.h
@@ -338,7 +338,7 @@ struct rockchip_pin_bank {
u32 toggle_edge_mode;
u32 recalced_mask;
u32 route_mask;
- struct list_head deferred_pins;
+ struct list_head deferred_output;
struct mutex deferred_lock;
};
@@ -414,12 +414,9 @@ struct rockchip_pin_config {
unsigned int nconfigs;
};
-enum pin_config_param;
-
-struct rockchip_pin_deferred {
+struct rockchip_pin_output_deferred {
struct list_head head;
unsigned int pin;
- enum pin_config_param param;
u32 arg;
};
--
2.25.1
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