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Message-ID: <20250710142038.1986052-5-andrei.stefanescu@oss.nxp.com>
Date: Thu, 10 Jul 2025 17:20:27 +0300
From: Andrei Stefanescu <andrei.stefanescu@....nxp.com>
To: linus.walleij@...aro.org,
brgl@...ev.pl,
robh@...nel.org,
krzk+dt@...nel.org,
conor+dt@...nel.org,
chester62515@...il.com,
mbrugger@...e.com,
Ghennadi.Procopciuc@....com,
larisa.grigore@....com,
lee@...nel.org,
shawnguo@...nel.org,
s.hauer@...gutronix.de,
festevam@...il.com,
aisheng.dong@....com,
ping.bai@....com,
gregkh@...uxfoundation.org,
rafael@...nel.org,
srini@...nel.org
Cc: linux-gpio@...r.kernel.org,
devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org,
s32@....com,
clizzi@...hat.com,
aruizrui@...hat.com,
eballetb@...hat.com,
echanude@...hat.com,
kernel@...gutronix.de,
imx@...ts.linux.dev,
vincent.guittot@...aro.org,
Andrei Stefanescu <andrei.stefanescu@....nxp.com>
Subject: [PATCH v7 04/12] pinctrl: s32cc: small refactoring
Change dev_err&return statements into dev_err_probe throughout the driver
on the probing path. Moreover, add/fix some comments and print
statements.
Signed-off-by: Andrei Stefanescu <andrei.stefanescu@....nxp.com>
---
drivers/pinctrl/nxp/pinctrl-s32cc.c | 106 +++++++++++++++-------------
1 file changed, 55 insertions(+), 51 deletions(-)
diff --git a/drivers/pinctrl/nxp/pinctrl-s32cc.c b/drivers/pinctrl/nxp/pinctrl-s32cc.c
index 501eb296c760..c90cd96a9dc4 100644
--- a/drivers/pinctrl/nxp/pinctrl-s32cc.c
+++ b/drivers/pinctrl/nxp/pinctrl-s32cc.c
@@ -2,7 +2,7 @@
/*
* Core driver for the S32 CC (Common Chassis) pin controller
*
- * Copyright 2017-2022,2024 NXP
+ * Copyright 2017-2022,2024-2025 NXP
* Copyright (C) 2022 SUSE LLC
* Copyright 2015-2016 Freescale Semiconductor, Inc.
*/
@@ -60,14 +60,20 @@ static u32 get_pin_func(u32 pinmux)
return pinmux & GENMASK(3, 0);
}
+/**
+ * struct s32_pinctrl_mem_region - memory region for a set of SIUL2 registers
+ * @map: regmap used for this range
+ * @pin_range: the pins controlled by these registers
+ * @name: name of the current range
+ */
struct s32_pinctrl_mem_region {
struct regmap *map;
const struct s32_pin_range *pin_range;
char name[8];
};
-/*
- * Holds pin configuration for GPIO's.
+/**
+ * struct gpio_pin_config - holds pin configuration for GPIO's
* @pin_id: Pin ID for this GPIO
* @config: Pin settings
* @list: Linked list entry for each gpio pin
@@ -78,21 +84,23 @@ struct gpio_pin_config {
struct list_head list;
};
-/*
- * Pad config save/restore for power suspend/resume.
+/**
+ * struct s32_pinctrl_context - pad config save/restore for suspend/resume
+ * @pads: saved values for the pards
*/
struct s32_pinctrl_context {
unsigned int *pads;
};
-/*
+/**
+ * struct s32_pinctrl - private driver data
* @dev: a pointer back to containing device
* @pctl: a pointer to the pinctrl device structure
* @regions: reserved memory regions with start/end pin
* @info: structure containing information about the pin
- * @gpio_configs: Saved configurations for GPIO pins
- * @gpiop_configs_lock: lock for the `gpio_configs` list
- * @s32_pinctrl_context: Configuration saved over system sleep
+ * @gpio_configs: saved configurations for GPIO pins
+ * @gpio_configs_lock: lock for the `gpio_configs` list
+ * @saved_context: configuration saved over system sleep
*/
struct s32_pinctrl {
struct device *dev;
@@ -123,13 +131,13 @@ s32_get_region(struct pinctrl_dev *pctldev, unsigned int pin)
return NULL;
}
-static inline int s32_check_pin(struct pinctrl_dev *pctldev,
- unsigned int pin)
+static int s32_check_pin(struct pinctrl_dev *pctldev,
+ unsigned int pin)
{
return s32_get_region(pctldev, pin) ? 0 : -EINVAL;
}
-static inline int s32_regmap_read(struct pinctrl_dev *pctldev,
+static int s32_regmap_read(struct pinctrl_dev *pctldev,
unsigned int pin, unsigned int *val)
{
struct s32_pinctrl_mem_region *region;
@@ -145,7 +153,7 @@ static inline int s32_regmap_read(struct pinctrl_dev *pctldev,
return regmap_read(region->map, offset, val);
}
-static inline int s32_regmap_write(struct pinctrl_dev *pctldev,
+static int s32_regmap_write(struct pinctrl_dev *pctldev,
unsigned int pin,
unsigned int val)
{
@@ -163,7 +171,7 @@ static inline int s32_regmap_write(struct pinctrl_dev *pctldev,
}
-static inline int s32_regmap_update(struct pinctrl_dev *pctldev, unsigned int pin,
+static int s32_regmap_update(struct pinctrl_dev *pctldev, unsigned int pin,
unsigned int mask, unsigned int val)
{
struct s32_pinctrl_mem_region *region;
@@ -236,10 +244,10 @@ static int s32_dt_group_node_to_map(struct pinctrl_dev *pctldev,
}
ret = pinconf_generic_parse_dt_config(np, pctldev, &cfgs, &n_cfgs);
- if (ret) {
- dev_err(dev, "%pOF: could not parse node property\n", np);
- return ret;
- }
+ if (ret)
+ return dev_err_probe(dev, ret,
+ "%pOF: could not parse node property\n",
+ np);
if (n_cfgs)
reserve++;
@@ -321,7 +329,7 @@ static int s32_pmx_set(struct pinctrl_dev *pctldev, unsigned int selector,
/* Check beforehand so we don't have a partial config. */
for (i = 0; i < grp->data.npins; i++) {
if (s32_check_pin(pctldev, grp->data.pins[i]) != 0) {
- dev_err(info->dev, "invalid pin: %u in group: %u\n",
+ dev_err(info->dev, "Invalid pin: %u in group: %u\n",
grp->data.pins[i], group);
return -EINVAL;
}
@@ -475,8 +483,8 @@ static int s32_get_slew_regval(int arg)
return -EINVAL;
}
-static inline void s32_pin_set_pull(enum pin_config_param param,
- unsigned int *mask, unsigned int *config)
+static void s32_pin_set_pull(enum pin_config_param param,
+ unsigned int *mask, unsigned int *config)
{
switch (param) {
case PIN_CONFIG_BIAS_DISABLE:
@@ -762,15 +770,15 @@ static int s32_pinctrl_parse_groups(struct device_node *np,
grp->data.name = np->name;
npins = of_property_count_elems_of_size(np, "pinmux", sizeof(u32));
- if (npins < 0) {
- dev_err(dev, "Failed to read 'pinmux' property in node %s.\n",
- grp->data.name);
- return -EINVAL;
- }
- if (!npins) {
- dev_err(dev, "The group %s has no pins.\n", grp->data.name);
- return -EINVAL;
- }
+ if (npins < 0)
+ return dev_err_probe(dev, -EINVAL,
+ "Failed to read 'pinmux' in node %s\n",
+ grp->data.name);
+
+ if (!npins)
+ return dev_err_probe(dev, -EINVAL,
+ "The group %s has no pins\n",
+ grp->data.name);
grp->data.npins = npins;
@@ -811,10 +819,9 @@ static int s32_pinctrl_parse_functions(struct device_node *np,
/* Initialise function */
func->name = np->name;
func->ngroups = of_get_child_count(np);
- if (func->ngroups == 0) {
- dev_err(info->dev, "no groups defined in %pOF\n", np);
- return -EINVAL;
- }
+ if (func->ngroups == 0)
+ return dev_err_probe(info->dev, -EINVAL,
+ "No groups defined in %pOF\n", np);
groups = devm_kcalloc(info->dev, func->ngroups,
sizeof(*func->groups), GFP_KERNEL);
@@ -885,10 +892,9 @@ static int s32_pinctrl_probe_dt(struct platform_device *pdev,
}
nfuncs = of_get_child_count(np);
- if (nfuncs <= 0) {
- dev_err(&pdev->dev, "no functions defined\n");
- return -EINVAL;
- }
+ if (nfuncs <= 0)
+ return dev_err_probe(&pdev->dev, -EINVAL,
+ "No functions defined\n");
info->nfunctions = nfuncs;
info->functions = devm_kcalloc(&pdev->dev, nfuncs,
@@ -918,18 +924,17 @@ static int s32_pinctrl_probe_dt(struct platform_device *pdev,
int s32_pinctrl_probe(struct platform_device *pdev,
const struct s32_pinctrl_soc_data *soc_data)
{
- struct s32_pinctrl *ipctl;
- int ret;
- struct pinctrl_desc *s32_pinctrl_desc;
- struct s32_pinctrl_soc_info *info;
#ifdef CONFIG_PM_SLEEP
struct s32_pinctrl_context *saved_context;
#endif
+ struct pinctrl_desc *s32_pinctrl_desc;
+ struct s32_pinctrl_soc_info *info;
+ struct s32_pinctrl *ipctl;
+ int ret;
- if (!soc_data || !soc_data->pins || !soc_data->npins) {
- dev_err(&pdev->dev, "wrong pinctrl info\n");
- return -EINVAL;
- }
+ if (!soc_data || !soc_data->pins || !soc_data->npins)
+ return dev_err_probe(&pdev->dev, -EINVAL,
+ "Wrong pinctrl info\n");
info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
if (!info)
@@ -964,16 +969,15 @@ int s32_pinctrl_probe(struct platform_device *pdev,
s32_pinctrl_desc->owner = THIS_MODULE;
ret = s32_pinctrl_probe_dt(pdev, ipctl);
- if (ret) {
- dev_err(&pdev->dev, "fail to probe dt properties\n");
- return ret;
- }
+ if (ret)
+ return dev_err_probe(&pdev->dev, ret,
+ "Fail to probe dt properties\n");
ipctl->pctl = devm_pinctrl_register(&pdev->dev, s32_pinctrl_desc,
ipctl);
if (IS_ERR(ipctl->pctl))
return dev_err_probe(&pdev->dev, PTR_ERR(ipctl->pctl),
- "could not register s32 pinctrl driver\n");
+ "Could not register s32 pinctrl driver\n");
#ifdef CONFIG_PM_SLEEP
saved_context = &ipctl->saved_context;
--
2.45.2
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