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Message-Id: <20241223020629.3471182-1-zmw12306@gmail.com>
Date: Sun, 22 Dec 2024 21:06:29 -0500
From: Mingwei Zheng <zmw12306@...il.com>
To: marex@...x.de
Cc: antonio.borneo@...s.st.com,
linus.walleij@...aro.org,
mcoquelin.stm32@...il.com,
alexandre.torgue@...s.st.com,
make24@...as.ac.cn,
peng.fan@....com,
fabien.dessenne@...s.st.com,
linux-gpio@...r.kernel.org,
linux-stm32@...md-mailman.stormreply.com,
linux-arm-kernel@...ts.infradead.org,
linux-kernel@...r.kernel.org,
Mingwei Zheng <zmw12306@...il.com>,
Jiasheng Jiang <jiashengjiangcool@...il.com>
Subject: [PATCH v6] pinctrl: stm32: Add check for clk_enable()
Convert the driver to clk_bulk*() API.
Add check for the return value of clk_bulk_enable() to catch
the potential error.
Fixes: 05d8af449d93 ("pinctrl: stm32: Keep pinctrl block clock enabled when LEVEL IRQ requested")
Signed-off-by: Mingwei Zheng <zmw12306@...il.com>
Signed-off-by: Jiasheng Jiang <jiashengjiangcool@...il.com>
---
Changelog:
v5 -> v6:
1. Call devm_clk_bulk_get_all in stm32_pctl_probe().
v4 -> v5:
1. Move the clock handling from stm32_gpiolib_register_bank()
and moving it to its caller.
2. Call clk_bulk_prepare_enable() in stm32_pctl_probe()
and clk_bulk_disable_unprepare() for error.
v3 -> v4:
1. Add initialization for pctl->clks.
2. Adjust alignment.
v2 -> v3:
1. Convert clk_disable_unprepare to clk_bulk_disable
and clk_bulk_unprepare.
v1 -> v2:
1. Move int ret declaration into if block.
---
drivers/pinctrl/stm32/pinctrl-stm32.c | 64 ++++++++++-----------------
1 file changed, 24 insertions(+), 40 deletions(-)
diff --git a/drivers/pinctrl/stm32/pinctrl-stm32.c b/drivers/pinctrl/stm32/pinctrl-stm32.c
index 5b7fa77c1184..3efe976adf84 100644
--- a/drivers/pinctrl/stm32/pinctrl-stm32.c
+++ b/drivers/pinctrl/stm32/pinctrl-stm32.c
@@ -86,7 +86,6 @@ struct stm32_pinctrl_group {
struct stm32_gpio_bank {
void __iomem *base;
- struct clk *clk;
struct reset_control *rstc;
spinlock_t lock;
struct gpio_chip gpio_chip;
@@ -108,6 +107,7 @@ struct stm32_pinctrl {
unsigned ngroups;
const char **grp_names;
struct stm32_gpio_bank *banks;
+ struct clk_bulk_data *clks;
unsigned nbanks;
const struct stm32_pinctrl_match_data *match_data;
struct irq_domain *domain;
@@ -1308,12 +1308,6 @@ static int stm32_gpiolib_register_bank(struct stm32_pinctrl *pctl, struct fwnode
if (IS_ERR(bank->base))
return PTR_ERR(bank->base);
- err = clk_prepare_enable(bank->clk);
- if (err) {
- dev_err(dev, "failed to prepare_enable clk (%d)\n", err);
- return err;
- }
-
bank->gpio_chip = stm32_gpio_template;
fwnode_property_read_string(fwnode, "st,bank-name", &bank->gpio_chip.label);
@@ -1360,26 +1354,21 @@ static int stm32_gpiolib_register_bank(struct stm32_pinctrl *pctl, struct fwnode
bank->fwnode, &stm32_gpio_domain_ops,
bank);
- if (!bank->domain) {
- err = -ENODEV;
- goto err_clk;
- }
+ if (!bank->domain)
+ return -ENODEV;
}
names = devm_kcalloc(dev, npins, sizeof(char *), GFP_KERNEL);
- if (!names) {
- err = -ENOMEM;
- goto err_clk;
- }
+ if (!names)
+ return -ENOMEM;
for (i = 0; i < npins; i++) {
stm32_pin = stm32_pctrl_get_desc_pin_from_gpio(pctl, bank, i);
if (stm32_pin && stm32_pin->pin.name) {
names[i] = devm_kasprintf(dev, GFP_KERNEL, "%s", stm32_pin->pin.name);
- if (!names[i]) {
- err = -ENOMEM;
- goto err_clk;
- }
+ if (!names[i])
+ return -ENOMEM;
+
} else {
names[i] = NULL;
}
@@ -1390,15 +1379,11 @@ static int stm32_gpiolib_register_bank(struct stm32_pinctrl *pctl, struct fwnode
err = gpiochip_add_data(&bank->gpio_chip, bank);
if (err) {
dev_err(dev, "Failed to add gpiochip(%d)!\n", bank_nr);
- goto err_clk;
+ return err;
}
dev_info(dev, "%s bank added\n", bank->gpio_chip.label);
return 0;
-
-err_clk:
- clk_disable_unprepare(bank->clk);
- return err;
}
static struct irq_domain *stm32_pctrl_get_irq_domain(struct platform_device *pdev)
@@ -1621,6 +1606,10 @@ int stm32_pctl_probe(struct platform_device *pdev)
if (!pctl->banks)
return -ENOMEM;
+ ret = devm_clk_bulk_get_all(dev, &pctl->clks);
+ if (ret < 0)
+ return ret;
+
i = 0;
for_each_gpiochip_node(dev, child) {
struct stm32_gpio_bank *bank = &pctl->banks[i];
@@ -1631,13 +1620,6 @@ int stm32_pctl_probe(struct platform_device *pdev)
fwnode_handle_put(child);
return -EPROBE_DEFER;
}
-
- bank->clk = of_clk_get_by_name(np, NULL);
- if (IS_ERR(bank->clk)) {
- fwnode_handle_put(child);
- return dev_err_probe(dev, PTR_ERR(bank->clk),
- "failed to get clk\n");
- }
i++;
}
@@ -1646,15 +1628,18 @@ int stm32_pctl_probe(struct platform_device *pdev)
if (ret) {
fwnode_handle_put(child);
- for (i = 0; i < pctl->nbanks; i++)
- clk_disable_unprepare(pctl->banks[i].clk);
-
return ret;
}
pctl->nbanks++;
}
+ ret = clk_bulk_prepare_enable(pctl->nbanks, pctl->clks);
+ if (ret) {
+ dev_err(dev, "failed to prepare_enable clk (%d)\n", ret);
+ return ret;
+ }
+
dev_info(dev, "Pinctrl STM32 initialized\n");
return 0;
@@ -1726,10 +1711,8 @@ static int __maybe_unused stm32_pinctrl_restore_gpio_regs(
int __maybe_unused stm32_pinctrl_suspend(struct device *dev)
{
struct stm32_pinctrl *pctl = dev_get_drvdata(dev);
- int i;
- for (i = 0; i < pctl->nbanks; i++)
- clk_disable(pctl->banks[i].clk);
+ clk_bulk_disable(pctl->nbanks, pctl->clks);
return 0;
}
@@ -1738,10 +1721,11 @@ int __maybe_unused stm32_pinctrl_resume(struct device *dev)
{
struct stm32_pinctrl *pctl = dev_get_drvdata(dev);
struct stm32_pinctrl_group *g = pctl->groups;
- int i;
+ int i, ret;
- for (i = 0; i < pctl->nbanks; i++)
- clk_enable(pctl->banks[i].clk);
+ ret = clk_bulk_enable(pctl->nbanks, pctl->clks);
+ if (ret)
+ return ret;
for (i = 0; i < pctl->ngroups; i++, g++)
stm32_pinctrl_restore_gpio_regs(pctl, g->pin);
--
2.34.1
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