* [PATCH 1/5] pinctrl: stm32: use new generic GPIO chip API
2025-08-11 15:01 [PATCH 0/5] pinctrl: replace legacy bgpio_init() with its modernized alternative Bartosz Golaszewski
@ 2025-08-11 15:02 ` Bartosz Golaszewski
2025-08-11 15:02 ` [PATCH 2/5] pinctrl: equilibrium: " Bartosz Golaszewski
` (4 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: Bartosz Golaszewski @ 2025-08-11 15:02 UTC (permalink / raw)
To: Clément Le Goffic, Linus Walleij, Maxime Coquelin,
Alexandre Torgue, Bartosz Golaszewski, Avi Fishman, Tomer Maimon,
Tali Perry, Patrick Venture, Nancy Yuen, Benjamin Fair,
Jonathan Neuschäfer
Cc: linux-gpio, linux-stm32, linux-arm-kernel, linux-kernel, openbmc,
Bartosz Golaszewski
From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Convert the driver to using the new generic GPIO chip interfaces from
linux/gpio/generic.h.
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
---
drivers/pinctrl/stm32/pinctrl-stm32-hdp.c | 32 ++++++++++++++++++-------------
1 file changed, 19 insertions(+), 13 deletions(-)
diff --git a/drivers/pinctrl/stm32/pinctrl-stm32-hdp.c b/drivers/pinctrl/stm32/pinctrl-stm32-hdp.c
index e91442eb566bb21f7691fa14fcf684957eb6549b..dea49b9aabf2aebbaaa3cb33c8add9926972ed9f 100644
--- a/drivers/pinctrl/stm32/pinctrl-stm32-hdp.c
+++ b/drivers/pinctrl/stm32/pinctrl-stm32-hdp.c
@@ -6,6 +6,7 @@
#include <linux/bits.h>
#include <linux/clk.h>
#include <linux/gpio/driver.h>
+#include <linux/gpio/generic.h>
#include <linux/io.h>
#include <linux/of.h>
#include <linux/of_device.h>
@@ -45,7 +46,7 @@ struct stm32_hdp {
void __iomem *base;
struct clk *clk;
struct pinctrl_dev *pctl_dev;
- struct gpio_chip gpio_chip;
+ struct gpio_generic_chip gpio_chip;
u32 mux_conf;
u32 gposet_conf;
const char * const *func_name;
@@ -603,6 +604,7 @@ MODULE_DEVICE_TABLE(of, stm32_hdp_of_match);
static int stm32_hdp_probe(struct platform_device *pdev)
{
+ struct gpio_generic_chip_config config;
struct device *dev = &pdev->dev;
struct stm32_hdp *hdp;
u8 version;
@@ -635,21 +637,25 @@ static int stm32_hdp_probe(struct platform_device *pdev)
if (err)
return dev_err_probe(dev, err, "Failed to enable pinctrl\n");
- hdp->gpio_chip.get_direction = stm32_hdp_gpio_get_direction;
- hdp->gpio_chip.ngpio = ARRAY_SIZE(stm32_hdp_pins);
- hdp->gpio_chip.can_sleep = true;
- hdp->gpio_chip.names = stm32_hdp_pins_group;
+ hdp->gpio_chip.gc.get_direction = stm32_hdp_gpio_get_direction;
+ hdp->gpio_chip.gc.ngpio = ARRAY_SIZE(stm32_hdp_pins);
+ hdp->gpio_chip.gc.can_sleep = true;
+ hdp->gpio_chip.gc.names = stm32_hdp_pins_group;
- err = bgpio_init(&hdp->gpio_chip, dev, 4,
- hdp->base + HDP_GPOVAL,
- hdp->base + HDP_GPOSET,
- hdp->base + HDP_GPOCLR,
- NULL, NULL, BGPIOF_NO_INPUT);
+ config = (typeof(config)){
+ .dev = dev,
+ .sz = 4,
+ .dat = hdp->base + HDP_GPOVAL,
+ .set = hdp->base + HDP_GPOSET,
+ .clr = hdp->base + HDP_GPOCLR,
+ .flags = BGPIOF_NO_INPUT,
+ };
+
+ err = gpio_generic_chip_init(&hdp->gpio_chip, &config);
if (err)
- return dev_err_probe(dev, err, "Failed to init bgpio\n");
+ return dev_err_probe(dev, err, "Failed to init the generic GPIO chip\n");
-
- err = devm_gpiochip_add_data(dev, &hdp->gpio_chip, hdp);
+ err = devm_gpiochip_add_data(dev, &hdp->gpio_chip.gc, hdp);
if (err)
return dev_err_probe(dev, err, "Failed to add gpiochip\n");
--
2.48.1
^ permalink raw reply related [flat|nested] 7+ messages in thread* [PATCH 2/5] pinctrl: equilibrium: use new generic GPIO chip API
2025-08-11 15:01 [PATCH 0/5] pinctrl: replace legacy bgpio_init() with its modernized alternative Bartosz Golaszewski
2025-08-11 15:02 ` [PATCH 1/5] pinctrl: stm32: use new generic GPIO chip API Bartosz Golaszewski
@ 2025-08-11 15:02 ` Bartosz Golaszewski
2025-08-11 15:02 ` [PATCH 3/5] pinctrl: npcm8xx: " Bartosz Golaszewski
` (3 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: Bartosz Golaszewski @ 2025-08-11 15:02 UTC (permalink / raw)
To: Clément Le Goffic, Linus Walleij, Maxime Coquelin,
Alexandre Torgue, Bartosz Golaszewski, Avi Fishman, Tomer Maimon,
Tali Perry, Patrick Venture, Nancy Yuen, Benjamin Fair,
Jonathan Neuschäfer
Cc: linux-gpio, linux-stm32, linux-arm-kernel, linux-kernel, openbmc,
Bartosz Golaszewski
From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Convert the driver to using the new generic GPIO chip interfaces from
linux/gpio/generic.h.
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
---
drivers/pinctrl/pinctrl-equilibrium.c | 26 ++++++++++++++++----------
drivers/pinctrl/pinctrl-equilibrium.h | 2 +-
2 files changed, 17 insertions(+), 11 deletions(-)
diff --git a/drivers/pinctrl/pinctrl-equilibrium.c b/drivers/pinctrl/pinctrl-equilibrium.c
index fce804d42e7d7f9233b2da0fb26e482170629424..210044185679384d03278e200d8f7723324487cd 100644
--- a/drivers/pinctrl/pinctrl-equilibrium.c
+++ b/drivers/pinctrl/pinctrl-equilibrium.c
@@ -2,6 +2,7 @@
/* Copyright (C) 2019 Intel Corporation */
#include <linux/gpio/driver.h>
+#include <linux/gpio/generic.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_address.h>
@@ -179,7 +180,7 @@ static int gpiochip_setup(struct device *dev, struct eqbr_gpio_ctrl *gctrl)
struct gpio_irq_chip *girq;
struct gpio_chip *gc;
- gc = &gctrl->chip;
+ gc = &gctrl->chip.gc;
gc->label = gctrl->name;
gc->fwnode = gctrl->fwnode;
gc->request = gpiochip_generic_request;
@@ -191,7 +192,7 @@ static int gpiochip_setup(struct device *dev, struct eqbr_gpio_ctrl *gctrl)
return 0;
}
- girq = &gctrl->chip.irq;
+ girq = &gctrl->chip.gc.irq;
gpio_irq_chip_set_chip(girq, &eqbr_irq_chip);
girq->parent_handler = eqbr_irq_handler;
girq->num_parents = 1;
@@ -208,6 +209,7 @@ static int gpiochip_setup(struct device *dev, struct eqbr_gpio_ctrl *gctrl)
static int gpiolib_reg(struct eqbr_pinctrl_drv_data *drvdata)
{
+ struct gpio_generic_chip_config config;
struct device *dev = drvdata->dev;
struct eqbr_gpio_ctrl *gctrl;
struct device_node *np;
@@ -239,12 +241,16 @@ static int gpiolib_reg(struct eqbr_pinctrl_drv_data *drvdata)
}
raw_spin_lock_init(&gctrl->lock);
- ret = bgpio_init(&gctrl->chip, dev, gctrl->bank->nr_pins / 8,
- gctrl->membase + GPIO_IN,
- gctrl->membase + GPIO_OUTSET,
- gctrl->membase + GPIO_OUTCLR,
- gctrl->membase + GPIO_DIR,
- NULL, 0);
+ config = (typeof(config)){
+ .dev = dev,
+ .sz = gctrl->bank->nr_pins / 8,
+ .dat = gctrl->membase + GPIO_IN,
+ .set = gctrl->membase + GPIO_OUTSET,
+ .clr = gctrl->membase + GPIO_OUTCLR,
+ .dirout = gctrl->membase + GPIO_DIR,
+ };
+
+ ret = gpio_generic_chip_init(&gctrl->chip, &config);
if (ret) {
dev_err(dev, "unable to init generic GPIO\n");
return ret;
@@ -254,7 +260,7 @@ static int gpiolib_reg(struct eqbr_pinctrl_drv_data *drvdata)
if (ret)
return ret;
- ret = devm_gpiochip_add_data(dev, &gctrl->chip, gctrl);
+ ret = devm_gpiochip_add_data(dev, &gctrl->chip.gc, gctrl);
if (ret)
return ret;
}
@@ -499,7 +505,7 @@ static int eqbr_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin,
bank->pin_base, pin);
return -ENODEV;
}
- gc = &gctrl->chip;
+ gc = &gctrl->chip.gc;
gc->direction_output(gc, offset, 0);
continue;
default:
diff --git a/drivers/pinctrl/pinctrl-equilibrium.h b/drivers/pinctrl/pinctrl-equilibrium.h
index b4d149bde39d8dd08a962bb05ccf026364dd9f68..b56124d7fe9132c875d2768b0af8b939f1a4fbf8 100644
--- a/drivers/pinctrl/pinctrl-equilibrium.h
+++ b/drivers/pinctrl/pinctrl-equilibrium.h
@@ -96,7 +96,7 @@ struct fwnode_handle;
* @lock: spin lock to protect gpio register write.
*/
struct eqbr_gpio_ctrl {
- struct gpio_chip chip;
+ struct gpio_generic_chip chip;
struct fwnode_handle *fwnode;
struct eqbr_pin_bank *bank;
void __iomem *membase;
--
2.48.1
^ permalink raw reply related [flat|nested] 7+ messages in thread* [PATCH 3/5] pinctrl: npcm8xx: use new generic GPIO chip API
2025-08-11 15:01 [PATCH 0/5] pinctrl: replace legacy bgpio_init() with its modernized alternative Bartosz Golaszewski
2025-08-11 15:02 ` [PATCH 1/5] pinctrl: stm32: use new generic GPIO chip API Bartosz Golaszewski
2025-08-11 15:02 ` [PATCH 2/5] pinctrl: equilibrium: " Bartosz Golaszewski
@ 2025-08-11 15:02 ` Bartosz Golaszewski
2025-08-11 15:02 ` [PATCH 4/5] pinctrl: npcm7xx: " Bartosz Golaszewski
` (2 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: Bartosz Golaszewski @ 2025-08-11 15:02 UTC (permalink / raw)
To: Clément Le Goffic, Linus Walleij, Maxime Coquelin,
Alexandre Torgue, Bartosz Golaszewski, Avi Fishman, Tomer Maimon,
Tali Perry, Patrick Venture, Nancy Yuen, Benjamin Fair,
Jonathan Neuschäfer
Cc: linux-gpio, linux-stm32, linux-arm-kernel, linux-kernel, openbmc,
Bartosz Golaszewski
From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Convert the driver to using the new generic GPIO chip interfaces from
linux/gpio/generic.h.
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
---
drivers/pinctrl/nuvoton/pinctrl-npcm8xx.c | 154 +++++++++++++++---------------
1 file changed, 78 insertions(+), 76 deletions(-)
diff --git a/drivers/pinctrl/nuvoton/pinctrl-npcm8xx.c b/drivers/pinctrl/nuvoton/pinctrl-npcm8xx.c
index 3c3b9d8d3681c64c21927615e1bb49f157f156b5..0f155a685bbae774129aa55b83865e546314e81c 100644
--- a/drivers/pinctrl/nuvoton/pinctrl-npcm8xx.c
+++ b/drivers/pinctrl/nuvoton/pinctrl-npcm8xx.c
@@ -4,6 +4,7 @@
#include <linux/bits.h>
#include <linux/device.h>
#include <linux/gpio/driver.h>
+#include <linux/gpio/generic.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/mfd/syscon.h>
@@ -90,7 +91,7 @@ struct debounce_time {
};
struct npcm8xx_gpio {
- struct gpio_chip gc;
+ struct gpio_generic_chip chip;
void __iomem *base;
struct debounce_time debounce;
int irqbase;
@@ -115,24 +116,20 @@ struct npcm8xx_pinctrl {
};
/* GPIO handling in the pinctrl driver */
-static void npcm_gpio_set(struct gpio_chip *gc, void __iomem *reg,
+static void npcm_gpio_set(struct gpio_generic_chip *chip, void __iomem *reg,
unsigned int pinmask)
{
- unsigned long flags;
+ guard(gpio_generic_lock_irqsave)(chip);
- raw_spin_lock_irqsave(&gc->bgpio_lock, flags);
iowrite32(ioread32(reg) | pinmask, reg);
- raw_spin_unlock_irqrestore(&gc->bgpio_lock, flags);
}
-static void npcm_gpio_clr(struct gpio_chip *gc, void __iomem *reg,
+static void npcm_gpio_clr(struct gpio_generic_chip *chip, void __iomem *reg,
unsigned int pinmask)
{
- unsigned long flags;
+ guard(gpio_generic_lock_irqsave)(chip);
- raw_spin_lock_irqsave(&gc->bgpio_lock, flags);
iowrite32(ioread32(reg) & ~pinmask, reg);
- raw_spin_unlock_irqrestore(&gc->bgpio_lock, flags);
}
static void npcmgpio_dbg_show(struct seq_file *s, struct gpio_chip *chip)
@@ -233,32 +230,32 @@ static int npcmgpio_set_irq_type(struct irq_data *d, unsigned int type)
switch (type) {
case IRQ_TYPE_EDGE_RISING:
- npcm_gpio_clr(&bank->gc, bank->base + NPCM8XX_GP_N_EVBE, gpio);
- npcm_gpio_clr(&bank->gc, bank->base + NPCM8XX_GP_N_POL, gpio);
+ npcm_gpio_clr(&bank->chip, bank->base + NPCM8XX_GP_N_EVBE, gpio);
+ npcm_gpio_clr(&bank->chip, bank->base + NPCM8XX_GP_N_POL, gpio);
break;
case IRQ_TYPE_EDGE_FALLING:
- npcm_gpio_clr(&bank->gc, bank->base + NPCM8XX_GP_N_EVBE, gpio);
- npcm_gpio_set(&bank->gc, bank->base + NPCM8XX_GP_N_POL, gpio);
+ npcm_gpio_clr(&bank->chip, bank->base + NPCM8XX_GP_N_EVBE, gpio);
+ npcm_gpio_set(&bank->chip, bank->base + NPCM8XX_GP_N_POL, gpio);
break;
case IRQ_TYPE_EDGE_BOTH:
- npcm_gpio_clr(&bank->gc, bank->base + NPCM8XX_GP_N_POL, gpio);
- npcm_gpio_set(&bank->gc, bank->base + NPCM8XX_GP_N_EVBE, gpio);
+ npcm_gpio_clr(&bank->chip, bank->base + NPCM8XX_GP_N_POL, gpio);
+ npcm_gpio_set(&bank->chip, bank->base + NPCM8XX_GP_N_EVBE, gpio);
break;
case IRQ_TYPE_LEVEL_LOW:
- npcm_gpio_set(&bank->gc, bank->base + NPCM8XX_GP_N_POL, gpio);
+ npcm_gpio_set(&bank->chip, bank->base + NPCM8XX_GP_N_POL, gpio);
break;
case IRQ_TYPE_LEVEL_HIGH:
- npcm_gpio_clr(&bank->gc, bank->base + NPCM8XX_GP_N_POL, gpio);
+ npcm_gpio_clr(&bank->chip, bank->base + NPCM8XX_GP_N_POL, gpio);
break;
default:
return -EINVAL;
}
if (type & IRQ_TYPE_LEVEL_MASK) {
- npcm_gpio_clr(&bank->gc, bank->base + NPCM8XX_GP_N_EVTYP, gpio);
+ npcm_gpio_clr(&bank->chip, bank->base + NPCM8XX_GP_N_EVTYP, gpio);
irq_set_handler_locked(d, handle_level_irq);
} else if (type & IRQ_TYPE_EDGE_BOTH) {
- npcm_gpio_set(&bank->gc, bank->base + NPCM8XX_GP_N_EVTYP, gpio);
+ npcm_gpio_set(&bank->chip, bank->base + NPCM8XX_GP_N_EVTYP, gpio);
irq_set_handler_locked(d, handle_edge_irq);
}
@@ -1842,7 +1839,7 @@ static void npcm8xx_setfunc(struct regmap *gcr_regmap, const unsigned int *pin,
static int npcm8xx_get_slew_rate(struct npcm8xx_gpio *bank,
struct regmap *gcr_regmap, unsigned int pin)
{
- int gpio = pin % bank->gc.ngpio;
+ int gpio = pin % bank->chip.gc.ngpio;
unsigned long pinmask = BIT(gpio);
u32 val;
@@ -1862,15 +1859,15 @@ static int npcm8xx_set_slew_rate(struct npcm8xx_gpio *bank,
int arg)
{
void __iomem *OSRC_Offset = bank->base + NPCM8XX_GP_N_OSRC;
- int gpio = BIT(pin % bank->gc.ngpio);
+ int gpio = BIT(pin % bank->chip.gc.ngpio);
if (pincfg[pin].flag & SLEW) {
switch (arg) {
case 0:
- npcm_gpio_clr(&bank->gc, OSRC_Offset, gpio);
+ npcm_gpio_clr(&bank->chip, OSRC_Offset, gpio);
return 0;
case 1:
- npcm_gpio_set(&bank->gc, OSRC_Offset, gpio);
+ npcm_gpio_set(&bank->chip, OSRC_Offset, gpio);
return 0;
default:
return -EINVAL;
@@ -1902,7 +1899,7 @@ static int npcm8xx_get_drive_strength(struct pinctrl_dev *pctldev,
struct npcm8xx_pinctrl *npcm = pinctrl_dev_get_drvdata(pctldev);
struct npcm8xx_gpio *bank =
&npcm->gpio_bank[pin / NPCM8XX_GPIO_PER_BANK];
- int gpio = pin % bank->gc.ngpio;
+ int gpio = pin % bank->chip.gc.ngpio;
unsigned long pinmask = BIT(gpio);
int flg, val;
u32 ds = 0;
@@ -1913,7 +1910,7 @@ static int npcm8xx_get_drive_strength(struct pinctrl_dev *pctldev,
val = ioread32(bank->base + NPCM8XX_GP_N_ODSC) & pinmask;
ds = val ? DSHI(flg) : DSLO(flg);
- dev_dbg(bank->gc.parent, "pin %d strength %d = %d\n", pin, val, ds);
+ dev_dbg(bank->chip.gc.parent, "pin %d strength %d = %d\n", pin, val, ds);
return ds;
}
@@ -1923,15 +1920,15 @@ static int npcm8xx_set_drive_strength(struct npcm8xx_pinctrl *npcm,
{
struct npcm8xx_gpio *bank =
&npcm->gpio_bank[pin / NPCM8XX_GPIO_PER_BANK];
- int gpio = BIT(pin % bank->gc.ngpio);
+ int gpio = BIT(pin % bank->chip.gc.ngpio);
int v;
v = pincfg[pin].flag & DRIVE_STRENGTH_MASK;
if (DSLO(v) == nval)
- npcm_gpio_clr(&bank->gc, bank->base + NPCM8XX_GP_N_ODSC, gpio);
+ npcm_gpio_clr(&bank->chip, bank->base + NPCM8XX_GP_N_ODSC, gpio);
else if (DSHI(v) == nval)
- npcm_gpio_set(&bank->gc, bank->base + NPCM8XX_GP_N_ODSC, gpio);
+ npcm_gpio_set(&bank->chip, bank->base + NPCM8XX_GP_N_ODSC, gpio);
else
return -ENOTSUPP;
@@ -2054,7 +2051,7 @@ static int npcm_gpio_set_direction(struct pinctrl_dev *pctldev,
struct npcm8xx_pinctrl *npcm = pinctrl_dev_get_drvdata(pctldev);
struct npcm8xx_gpio *bank =
&npcm->gpio_bank[offset / NPCM8XX_GPIO_PER_BANK];
- int gpio = BIT(offset % bank->gc.ngpio);
+ int gpio = BIT(offset % bank->chip.gc.ngpio);
if (input)
iowrite32(gpio, bank->base + NPCM8XX_GP_N_OEC);
@@ -2085,7 +2082,7 @@ static int debounce_timing_setting(struct npcm8xx_gpio *bank, u32 gpio,
if (bank->debounce.set_val[i]) {
if (bank->debounce.nanosec_val[i] == nanosecs) {
debounce_select = i << gpio_debounce;
- npcm_gpio_set(&bank->gc, DBNCS_offset,
+ npcm_gpio_set(&bank->chip, DBNCS_offset,
debounce_select);
break;
}
@@ -2093,7 +2090,7 @@ static int debounce_timing_setting(struct npcm8xx_gpio *bank, u32 gpio,
bank->debounce.set_val[i] = true;
bank->debounce.nanosec_val[i] = nanosecs;
debounce_select = i << gpio_debounce;
- npcm_gpio_set(&bank->gc, DBNCS_offset, debounce_select);
+ npcm_gpio_set(&bank->chip, DBNCS_offset, debounce_select);
switch (nanosecs) {
case 1 ... 1040:
iowrite32(0, bank->base + NPCM8XX_GP_N_DBNCP0 + (i * 4));
@@ -2145,21 +2142,21 @@ static int npcm_set_debounce(struct npcm8xx_pinctrl *npcm, unsigned int pin,
{
struct npcm8xx_gpio *bank =
&npcm->gpio_bank[pin / NPCM8XX_GPIO_PER_BANK];
- int gpio = BIT(pin % bank->gc.ngpio);
+ int gpio = BIT(pin % bank->chip.gc.ngpio);
int ret;
if (nanosecs) {
- ret = debounce_timing_setting(bank, pin % bank->gc.ngpio,
+ ret = debounce_timing_setting(bank, pin % bank->chip.gc.ngpio,
nanosecs);
if (ret)
dev_err(npcm->dev, "Pin %d, All four debounce timing values are used, please use one of exist debounce values\n", pin);
else
- npcm_gpio_set(&bank->gc, bank->base + NPCM8XX_GP_N_DBNC,
+ npcm_gpio_set(&bank->chip, bank->base + NPCM8XX_GP_N_DBNC,
gpio);
return ret;
}
- npcm_gpio_clr(&bank->gc, bank->base + NPCM8XX_GP_N_DBNC, gpio);
+ npcm_gpio_clr(&bank->chip, bank->base + NPCM8XX_GP_N_DBNC, gpio);
return 0;
}
@@ -2172,7 +2169,7 @@ static int npcm8xx_config_get(struct pinctrl_dev *pctldev, unsigned int pin,
struct npcm8xx_pinctrl *npcm = pinctrl_dev_get_drvdata(pctldev);
struct npcm8xx_gpio *bank =
&npcm->gpio_bank[pin / NPCM8XX_GPIO_PER_BANK];
- int gpio = pin % bank->gc.ngpio;
+ int gpio = pin % bank->chip.gc.ngpio;
unsigned long pinmask = BIT(gpio);
u32 ie, oe, pu, pd;
int rc = 0;
@@ -2235,34 +2232,34 @@ static int npcm8xx_config_set_one(struct npcm8xx_pinctrl *npcm,
struct npcm8xx_gpio *bank =
&npcm->gpio_bank[pin / NPCM8XX_GPIO_PER_BANK];
u32 arg = pinconf_to_config_argument(config);
- int gpio = BIT(pin % bank->gc.ngpio);
+ int gpio = BIT(pin % bank->chip.gc.ngpio);
switch (param) {
case PIN_CONFIG_BIAS_DISABLE:
- npcm_gpio_clr(&bank->gc, bank->base + NPCM8XX_GP_N_PU, gpio);
- npcm_gpio_clr(&bank->gc, bank->base + NPCM8XX_GP_N_PD, gpio);
+ npcm_gpio_clr(&bank->chip, bank->base + NPCM8XX_GP_N_PU, gpio);
+ npcm_gpio_clr(&bank->chip, bank->base + NPCM8XX_GP_N_PD, gpio);
break;
case PIN_CONFIG_BIAS_PULL_DOWN:
- npcm_gpio_clr(&bank->gc, bank->base + NPCM8XX_GP_N_PU, gpio);
- npcm_gpio_set(&bank->gc, bank->base + NPCM8XX_GP_N_PD, gpio);
+ npcm_gpio_clr(&bank->chip, bank->base + NPCM8XX_GP_N_PU, gpio);
+ npcm_gpio_set(&bank->chip, bank->base + NPCM8XX_GP_N_PD, gpio);
break;
case PIN_CONFIG_BIAS_PULL_UP:
- npcm_gpio_clr(&bank->gc, bank->base + NPCM8XX_GP_N_PD, gpio);
- npcm_gpio_set(&bank->gc, bank->base + NPCM8XX_GP_N_PU, gpio);
+ npcm_gpio_clr(&bank->chip, bank->base + NPCM8XX_GP_N_PD, gpio);
+ npcm_gpio_set(&bank->chip, bank->base + NPCM8XX_GP_N_PU, gpio);
break;
case PIN_CONFIG_INPUT_ENABLE:
iowrite32(gpio, bank->base + NPCM8XX_GP_N_OEC);
- bank->direction_input(&bank->gc, pin % bank->gc.ngpio);
+ bank->direction_input(&bank->chip.gc, pin % bank->chip.gc.ngpio);
break;
case PIN_CONFIG_OUTPUT:
- bank->direction_output(&bank->gc, pin % bank->gc.ngpio, arg);
+ bank->direction_output(&bank->chip.gc, pin % bank->chip.gc.ngpio, arg);
iowrite32(gpio, bank->base + NPCM8XX_GP_N_OES);
break;
case PIN_CONFIG_DRIVE_PUSH_PULL:
- npcm_gpio_clr(&bank->gc, bank->base + NPCM8XX_GP_N_OTYP, gpio);
+ npcm_gpio_clr(&bank->chip, bank->base + NPCM8XX_GP_N_OTYP, gpio);
break;
case PIN_CONFIG_DRIVE_OPEN_DRAIN:
- npcm_gpio_set(&bank->gc, bank->base + NPCM8XX_GP_N_OTYP, gpio);
+ npcm_gpio_set(&bank->chip, bank->base + NPCM8XX_GP_N_OTYP, gpio);
break;
case PIN_CONFIG_INPUT_DEBOUNCE:
return npcm_set_debounce(npcm, pin, arg * 1000);
@@ -2313,13 +2310,14 @@ static int npcmgpio_add_pin_ranges(struct gpio_chip *chip)
{
struct npcm8xx_gpio *bank = gpiochip_get_data(chip);
- return gpiochip_add_pin_range(&bank->gc, dev_name(chip->parent),
- bank->pinctrl_id, bank->gc.base,
- bank->gc.ngpio);
+ return gpiochip_add_pin_range(&bank->chip.gc, dev_name(chip->parent),
+ bank->pinctrl_id, bank->chip.gc.base,
+ bank->chip.gc.ngpio);
}
static int npcm8xx_gpio_fw(struct npcm8xx_pinctrl *pctrl)
{
+ struct gpio_generic_chip_config config;
struct fwnode_reference_args args;
struct device *dev = pctrl->dev;
struct fwnode_handle *child;
@@ -2331,15 +2329,19 @@ static int npcm8xx_gpio_fw(struct npcm8xx_pinctrl *pctrl)
if (!pctrl->gpio_bank[id].base)
return dev_err_probe(dev, -ENXIO, "fwnode_iomap id %d failed\n", id);
- ret = bgpio_init(&pctrl->gpio_bank[id].gc, dev, 4,
- pctrl->gpio_bank[id].base + NPCM8XX_GP_N_DIN,
- pctrl->gpio_bank[id].base + NPCM8XX_GP_N_DOUT,
- NULL,
- NULL,
- pctrl->gpio_bank[id].base + NPCM8XX_GP_N_IEM,
- BGPIOF_READ_OUTPUT_REG_SET);
+ config = (typeof(config)){
+ .dev = dev,
+ .sz = 4,
+ .dat = pctrl->gpio_bank[id].base + NPCM8XX_GP_N_DIN,
+ .set = pctrl->gpio_bank[id].base + NPCM8XX_GP_N_DOUT,
+ .dirin = pctrl->gpio_bank[id].base + NPCM8XX_GP_N_IEM,
+ .flags = BGPIOF_READ_OUTPUT_REG_SET,
+ };
+
+ ret = gpio_generic_chip_init(&pctrl->gpio_bank[id].chip, &config);
if (ret)
- return dev_err_probe(dev, ret, "bgpio_init() failed\n");
+ return dev_err_probe(dev, ret,
+ "failed to initialize the generic GPIO chip\n");
ret = fwnode_property_get_reference_args(child, "gpio-ranges", NULL, 3, 0, &args);
if (ret < 0)
@@ -2353,26 +2355,26 @@ static int npcm8xx_gpio_fw(struct npcm8xx_pinctrl *pctrl)
pctrl->gpio_bank[id].irq_chip = npcmgpio_irqchip;
pctrl->gpio_bank[id].irqbase = id * NPCM8XX_GPIO_PER_BANK;
pctrl->gpio_bank[id].pinctrl_id = args.args[0];
- pctrl->gpio_bank[id].gc.base = -1;
- pctrl->gpio_bank[id].gc.ngpio = args.args[2];
- pctrl->gpio_bank[id].gc.owner = THIS_MODULE;
- pctrl->gpio_bank[id].gc.parent = dev;
- pctrl->gpio_bank[id].gc.fwnode = child;
- pctrl->gpio_bank[id].gc.label = devm_kasprintf(dev, GFP_KERNEL, "%pfw", child);
- if (pctrl->gpio_bank[id].gc.label == NULL)
+ pctrl->gpio_bank[id].chip.gc.base = -1;
+ pctrl->gpio_bank[id].chip.gc.ngpio = args.args[2];
+ pctrl->gpio_bank[id].chip.gc.owner = THIS_MODULE;
+ pctrl->gpio_bank[id].chip.gc.parent = dev;
+ pctrl->gpio_bank[id].chip.gc.fwnode = child;
+ pctrl->gpio_bank[id].chip.gc.label = devm_kasprintf(dev, GFP_KERNEL, "%pfw", child);
+ if (pctrl->gpio_bank[id].chip.gc.label == NULL)
return -ENOMEM;
- pctrl->gpio_bank[id].gc.dbg_show = npcmgpio_dbg_show;
- pctrl->gpio_bank[id].direction_input = pctrl->gpio_bank[id].gc.direction_input;
- pctrl->gpio_bank[id].gc.direction_input = npcmgpio_direction_input;
- pctrl->gpio_bank[id].direction_output = pctrl->gpio_bank[id].gc.direction_output;
- pctrl->gpio_bank[id].gc.direction_output = npcmgpio_direction_output;
- pctrl->gpio_bank[id].request = pctrl->gpio_bank[id].gc.request;
- pctrl->gpio_bank[id].gc.request = npcmgpio_gpio_request;
- pctrl->gpio_bank[id].gc.free = pinctrl_gpio_free;
+ pctrl->gpio_bank[id].chip.gc.dbg_show = npcmgpio_dbg_show;
+ pctrl->gpio_bank[id].direction_input = pctrl->gpio_bank[id].chip.gc.direction_input;
+ pctrl->gpio_bank[id].chip.gc.direction_input = npcmgpio_direction_input;
+ pctrl->gpio_bank[id].direction_output = pctrl->gpio_bank[id].chip.gc.direction_output;
+ pctrl->gpio_bank[id].chip.gc.direction_output = npcmgpio_direction_output;
+ pctrl->gpio_bank[id].request = pctrl->gpio_bank[id].chip.gc.request;
+ pctrl->gpio_bank[id].chip.gc.request = npcmgpio_gpio_request;
+ pctrl->gpio_bank[id].chip.gc.free = pinctrl_gpio_free;
for (i = 0 ; i < NPCM8XX_DEBOUNCE_MAX ; i++)
pctrl->gpio_bank[id].debounce.set_val[i] = false;
- pctrl->gpio_bank[id].gc.add_pin_ranges = npcmgpio_add_pin_ranges;
+ pctrl->gpio_bank[id].chip.gc.add_pin_ranges = npcmgpio_add_pin_ranges;
id++;
}
@@ -2387,7 +2389,7 @@ static int npcm8xx_gpio_register(struct npcm8xx_pinctrl *pctrl)
for (id = 0 ; id < pctrl->bank_num ; id++) {
struct gpio_irq_chip *girq;
- girq = &pctrl->gpio_bank[id].gc.irq;
+ girq = &pctrl->gpio_bank[id].chip.gc.irq;
girq->chip = &pctrl->gpio_bank[id].irq_chip;
girq->parent_handler = npcmgpio_irq_handler;
girq->num_parents = 1;
@@ -2401,7 +2403,7 @@ static int npcm8xx_gpio_register(struct npcm8xx_pinctrl *pctrl)
girq->default_type = IRQ_TYPE_NONE;
girq->handler = handle_level_irq;
ret = devm_gpiochip_add_data(pctrl->dev,
- &pctrl->gpio_bank[id].gc,
+ &pctrl->gpio_bank[id].chip.gc,
&pctrl->gpio_bank[id]);
if (ret)
return dev_err_probe(pctrl->dev, ret, "Failed to add GPIO chip %u\n", id);
--
2.48.1
^ permalink raw reply related [flat|nested] 7+ messages in thread* [PATCH 4/5] pinctrl: npcm7xx: use new generic GPIO chip API
2025-08-11 15:01 [PATCH 0/5] pinctrl: replace legacy bgpio_init() with its modernized alternative Bartosz Golaszewski
` (2 preceding siblings ...)
2025-08-11 15:02 ` [PATCH 3/5] pinctrl: npcm8xx: " Bartosz Golaszewski
@ 2025-08-11 15:02 ` Bartosz Golaszewski
2025-08-11 15:02 ` [PATCH 5/5] pinctrl: wpcm450: " Bartosz Golaszewski
2025-08-19 9:43 ` [PATCH 0/5] pinctrl: replace legacy bgpio_init() with its modernized alternative Linus Walleij
5 siblings, 0 replies; 7+ messages in thread
From: Bartosz Golaszewski @ 2025-08-11 15:02 UTC (permalink / raw)
To: Clément Le Goffic, Linus Walleij, Maxime Coquelin,
Alexandre Torgue, Bartosz Golaszewski, Avi Fishman, Tomer Maimon,
Tali Perry, Patrick Venture, Nancy Yuen, Benjamin Fair,
Jonathan Neuschäfer
Cc: linux-gpio, linux-stm32, linux-arm-kernel, linux-kernel, openbmc,
Bartosz Golaszewski
From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Convert the driver to using the new generic GPIO chip interfaces from
linux/gpio/generic.h.
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
---
drivers/pinctrl/nuvoton/pinctrl-npcm7xx.c | 181 +++++++++++++++---------------
1 file changed, 90 insertions(+), 91 deletions(-)
diff --git a/drivers/pinctrl/nuvoton/pinctrl-npcm7xx.c b/drivers/pinctrl/nuvoton/pinctrl-npcm7xx.c
index b8872d8f5930ad931dad208afec4e08a23c3d653..c2ca71ebb9736d1b3043fa6626767811a67e61f2 100644
--- a/drivers/pinctrl/nuvoton/pinctrl-npcm7xx.c
+++ b/drivers/pinctrl/nuvoton/pinctrl-npcm7xx.c
@@ -4,6 +4,7 @@
#include <linux/device.h>
#include <linux/gpio/driver.h>
+#include <linux/gpio/generic.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/mfd/syscon.h>
@@ -77,7 +78,7 @@
/* Structure for register banks */
struct npcm7xx_gpio {
void __iomem *base;
- struct gpio_chip gc;
+ struct gpio_generic_chip chip;
int irqbase;
int irq;
u32 pinctrl_id;
@@ -99,32 +100,26 @@ struct npcm7xx_pinctrl {
};
/* GPIO handling in the pinctrl driver */
-static void npcm_gpio_set(struct gpio_chip *gc, void __iomem *reg,
+static void npcm_gpio_set(struct gpio_generic_chip *chip, void __iomem *reg,
unsigned int pinmask)
{
- unsigned long flags;
unsigned long val;
- raw_spin_lock_irqsave(&gc->bgpio_lock, flags);
+ guard(gpio_generic_lock_irqsave)(chip);
val = ioread32(reg) | pinmask;
iowrite32(val, reg);
-
- raw_spin_unlock_irqrestore(&gc->bgpio_lock, flags);
}
-static void npcm_gpio_clr(struct gpio_chip *gc, void __iomem *reg,
+static void npcm_gpio_clr(struct gpio_generic_chip *chip, void __iomem *reg,
unsigned int pinmask)
{
- unsigned long flags;
unsigned long val;
- raw_spin_lock_irqsave(&gc->bgpio_lock, flags);
+ guard(gpio_generic_lock_irqsave)(chip);
val = ioread32(reg) & ~pinmask;
iowrite32(val, reg);
-
- raw_spin_unlock_irqrestore(&gc->bgpio_lock, flags);
}
static void npcmgpio_dbg_show(struct seq_file *s, struct gpio_chip *chip)
@@ -132,9 +127,9 @@ static void npcmgpio_dbg_show(struct seq_file *s, struct gpio_chip *chip)
struct npcm7xx_gpio *bank = gpiochip_get_data(chip);
seq_printf(s, "-- module %d [gpio%d - %d]\n",
- bank->gc.base / bank->gc.ngpio,
- bank->gc.base,
- bank->gc.base + bank->gc.ngpio);
+ bank->chip.gc.base / bank->chip.gc.ngpio,
+ bank->chip.gc.base,
+ bank->chip.gc.base + bank->chip.gc.ngpio);
seq_printf(s, "DIN :%.8x DOUT:%.8x IE :%.8x OE :%.8x\n",
ioread32(bank->base + NPCM7XX_GP_N_DIN),
ioread32(bank->base + NPCM7XX_GP_N_DOUT),
@@ -220,7 +215,7 @@ static void npcmgpio_irq_handler(struct irq_desc *desc)
chained_irq_enter(chip, desc);
sts = ioread32(bank->base + NPCM7XX_GP_N_EVST);
en = ioread32(bank->base + NPCM7XX_GP_N_EVEN);
- dev_dbg(bank->gc.parent, "==> got irq sts %.8lx %.8lx\n", sts,
+ dev_dbg(bank->chip.gc.parent, "==> got irq sts %.8lx %.8lx\n", sts,
en);
sts &= en;
@@ -235,42 +230,42 @@ static int npcmgpio_set_irq_type(struct irq_data *d, unsigned int type)
struct npcm7xx_gpio *bank = gpiochip_get_data(gc);
unsigned int gpio = BIT(irqd_to_hwirq(d));
- dev_dbg(bank->gc.parent, "setirqtype: %u.%u = %u\n", gpio,
+ dev_dbg(bank->chip.gc.parent, "setirqtype: %u.%u = %u\n", gpio,
d->irq, type);
switch (type) {
case IRQ_TYPE_EDGE_RISING:
- dev_dbg(bank->gc.parent, "edge.rising\n");
- npcm_gpio_clr(&bank->gc, bank->base + NPCM7XX_GP_N_EVBE, gpio);
- npcm_gpio_clr(&bank->gc, bank->base + NPCM7XX_GP_N_POL, gpio);
+ dev_dbg(bank->chip.gc.parent, "edge.rising\n");
+ npcm_gpio_clr(&bank->chip, bank->base + NPCM7XX_GP_N_EVBE, gpio);
+ npcm_gpio_clr(&bank->chip, bank->base + NPCM7XX_GP_N_POL, gpio);
break;
case IRQ_TYPE_EDGE_FALLING:
- dev_dbg(bank->gc.parent, "edge.falling\n");
- npcm_gpio_clr(&bank->gc, bank->base + NPCM7XX_GP_N_EVBE, gpio);
- npcm_gpio_set(&bank->gc, bank->base + NPCM7XX_GP_N_POL, gpio);
+ dev_dbg(bank->chip.gc.parent, "edge.falling\n");
+ npcm_gpio_clr(&bank->chip, bank->base + NPCM7XX_GP_N_EVBE, gpio);
+ npcm_gpio_set(&bank->chip, bank->base + NPCM7XX_GP_N_POL, gpio);
break;
case IRQ_TYPE_EDGE_BOTH:
- dev_dbg(bank->gc.parent, "edge.both\n");
- npcm_gpio_set(&bank->gc, bank->base + NPCM7XX_GP_N_EVBE, gpio);
+ dev_dbg(bank->chip.gc.parent, "edge.both\n");
+ npcm_gpio_set(&bank->chip, bank->base + NPCM7XX_GP_N_EVBE, gpio);
break;
case IRQ_TYPE_LEVEL_LOW:
- dev_dbg(bank->gc.parent, "level.low\n");
- npcm_gpio_set(&bank->gc, bank->base + NPCM7XX_GP_N_POL, gpio);
+ dev_dbg(bank->chip.gc.parent, "level.low\n");
+ npcm_gpio_set(&bank->chip, bank->base + NPCM7XX_GP_N_POL, gpio);
break;
case IRQ_TYPE_LEVEL_HIGH:
- dev_dbg(bank->gc.parent, "level.high\n");
- npcm_gpio_clr(&bank->gc, bank->base + NPCM7XX_GP_N_POL, gpio);
+ dev_dbg(bank->chip.gc.parent, "level.high\n");
+ npcm_gpio_clr(&bank->chip, bank->base + NPCM7XX_GP_N_POL, gpio);
break;
default:
- dev_dbg(bank->gc.parent, "invalid irq type\n");
+ dev_dbg(bank->chip.gc.parent, "invalid irq type\n");
return -EINVAL;
}
if (type & (IRQ_TYPE_LEVEL_HIGH | IRQ_TYPE_LEVEL_LOW)) {
- npcm_gpio_clr(&bank->gc, bank->base + NPCM7XX_GP_N_EVTYP, gpio);
+ npcm_gpio_clr(&bank->chip, bank->base + NPCM7XX_GP_N_EVTYP, gpio);
irq_set_handler_locked(d, handle_level_irq);
} else if (type & (IRQ_TYPE_EDGE_BOTH | IRQ_TYPE_EDGE_RISING
| IRQ_TYPE_EDGE_FALLING)) {
- npcm_gpio_set(&bank->gc, bank->base + NPCM7XX_GP_N_EVTYP, gpio);
+ npcm_gpio_set(&bank->chip, bank->base + NPCM7XX_GP_N_EVTYP, gpio);
irq_set_handler_locked(d, handle_edge_irq);
}
@@ -283,7 +278,7 @@ static void npcmgpio_irq_ack(struct irq_data *d)
struct npcm7xx_gpio *bank = gpiochip_get_data(gc);
unsigned int gpio = irqd_to_hwirq(d);
- dev_dbg(bank->gc.parent, "irq_ack: %u.%u\n", gpio, d->irq);
+ dev_dbg(bank->chip.gc.parent, "irq_ack: %u.%u\n", gpio, d->irq);
iowrite32(BIT(gpio), bank->base + NPCM7XX_GP_N_EVST);
}
@@ -295,7 +290,7 @@ static void npcmgpio_irq_mask(struct irq_data *d)
unsigned int gpio = irqd_to_hwirq(d);
/* Clear events */
- dev_dbg(bank->gc.parent, "irq_mask: %u.%u\n", gpio, d->irq);
+ dev_dbg(bank->chip.gc.parent, "irq_mask: %u.%u\n", gpio, d->irq);
iowrite32(BIT(gpio), bank->base + NPCM7XX_GP_N_EVENC);
gpiochip_disable_irq(gc, gpio);
}
@@ -309,7 +304,7 @@ static void npcmgpio_irq_unmask(struct irq_data *d)
/* Enable events */
gpiochip_enable_irq(gc, gpio);
- dev_dbg(bank->gc.parent, "irq_unmask: %u.%u\n", gpio, d->irq);
+ dev_dbg(bank->chip.gc.parent, "irq_unmask: %u.%u\n", gpio, d->irq);
iowrite32(BIT(gpio), bank->base + NPCM7XX_GP_N_EVENS);
}
@@ -1423,7 +1418,7 @@ static int npcm7xx_get_slew_rate(struct npcm7xx_gpio *bank,
struct regmap *gcr_regmap, unsigned int pin)
{
u32 val;
- int gpio = (pin % bank->gc.ngpio);
+ int gpio = (pin % bank->chip.gc.ngpio);
unsigned long pinmask = BIT(gpio);
if (pincfg[pin].flag & SLEW)
@@ -1443,16 +1438,16 @@ static int npcm7xx_set_slew_rate(struct npcm7xx_gpio *bank,
struct regmap *gcr_regmap, unsigned int pin,
int arg)
{
- int gpio = BIT(pin % bank->gc.ngpio);
+ int gpio = BIT(pin % bank->chip.gc.ngpio);
if (pincfg[pin].flag & SLEW) {
switch (arg) {
case 0:
- npcm_gpio_clr(&bank->gc, bank->base + NPCM7XX_GP_N_OSRC,
+ npcm_gpio_clr(&bank->chip, bank->base + NPCM7XX_GP_N_OSRC,
gpio);
return 0;
case 1:
- npcm_gpio_set(&bank->gc, bank->base + NPCM7XX_GP_N_OSRC,
+ npcm_gpio_set(&bank->chip, bank->base + NPCM7XX_GP_N_OSRC,
gpio);
return 0;
default:
@@ -1485,7 +1480,7 @@ static int npcm7xx_get_drive_strength(struct pinctrl_dev *pctldev,
struct npcm7xx_pinctrl *npcm = pinctrl_dev_get_drvdata(pctldev);
struct npcm7xx_gpio *bank =
&npcm->gpio_bank[pin / NPCM7XX_GPIO_PER_BANK];
- int gpio = (pin % bank->gc.ngpio);
+ int gpio = (pin % bank->chip.gc.ngpio);
unsigned long pinmask = BIT(gpio);
u32 ds = 0;
int flg, val;
@@ -1496,7 +1491,7 @@ static int npcm7xx_get_drive_strength(struct pinctrl_dev *pctldev,
val = ioread32(bank->base + NPCM7XX_GP_N_ODSC)
& pinmask;
ds = val ? DSHI(flg) : DSLO(flg);
- dev_dbg(bank->gc.parent,
+ dev_dbg(bank->chip.gc.parent,
"pin %d strength %d = %d\n", pin, val, ds);
return ds;
}
@@ -1511,20 +1506,20 @@ static int npcm7xx_set_drive_strength(struct npcm7xx_pinctrl *npcm,
int v;
struct npcm7xx_gpio *bank =
&npcm->gpio_bank[pin / NPCM7XX_GPIO_PER_BANK];
- int gpio = BIT(pin % bank->gc.ngpio);
+ int gpio = BIT(pin % bank->chip.gc.ngpio);
v = (pincfg[pin].flag & DRIVE_STRENGTH_MASK);
if (!nval || !v)
return -ENOTSUPP;
if (DSLO(v) == nval) {
- dev_dbg(bank->gc.parent,
+ dev_dbg(bank->chip.gc.parent,
"setting pin %d to low strength [%d]\n", pin, nval);
- npcm_gpio_clr(&bank->gc, bank->base + NPCM7XX_GP_N_ODSC, gpio);
+ npcm_gpio_clr(&bank->chip, bank->base + NPCM7XX_GP_N_ODSC, gpio);
return 0;
} else if (DSHI(v) == nval) {
- dev_dbg(bank->gc.parent,
+ dev_dbg(bank->chip.gc.parent,
"setting pin %d to high strength [%d]\n", pin, nval);
- npcm_gpio_set(&bank->gc, bank->base + NPCM7XX_GP_N_ODSC, gpio);
+ npcm_gpio_set(&bank->chip, bank->base + NPCM7XX_GP_N_ODSC, gpio);
return 0;
}
@@ -1657,9 +1652,9 @@ static int npcm_gpio_set_direction(struct pinctrl_dev *pctldev,
struct npcm7xx_pinctrl *npcm = pinctrl_dev_get_drvdata(pctldev);
struct npcm7xx_gpio *bank =
&npcm->gpio_bank[offset / NPCM7XX_GPIO_PER_BANK];
- int gpio = BIT(offset % bank->gc.ngpio);
+ int gpio = BIT(offset % bank->chip.gc.ngpio);
- dev_dbg(bank->gc.parent, "GPIO Set Direction: %d = %d\n", offset,
+ dev_dbg(bank->chip.gc.parent, "GPIO Set Direction: %d = %d\n", offset,
input);
if (input)
iowrite32(gpio, bank->base + NPCM7XX_GP_N_OEC);
@@ -1687,7 +1682,7 @@ static int npcm7xx_config_get(struct pinctrl_dev *pctldev, unsigned int pin,
struct npcm7xx_pinctrl *npcm = pinctrl_dev_get_drvdata(pctldev);
struct npcm7xx_gpio *bank =
&npcm->gpio_bank[pin / NPCM7XX_GPIO_PER_BANK];
- int gpio = (pin % bank->gc.ngpio);
+ int gpio = (pin % bank->chip.gc.ngpio);
unsigned long pinmask = BIT(gpio);
u32 ie, oe, pu, pd;
int rc = 0;
@@ -1750,38 +1745,38 @@ static int npcm7xx_config_set_one(struct npcm7xx_pinctrl *npcm,
u16 arg = pinconf_to_config_argument(config);
struct npcm7xx_gpio *bank =
&npcm->gpio_bank[pin / NPCM7XX_GPIO_PER_BANK];
- int gpio = BIT(pin % bank->gc.ngpio);
+ int gpio = BIT(pin % bank->chip.gc.ngpio);
- dev_dbg(bank->gc.parent, "param=%d %d[GPIO]\n", param, pin);
+ dev_dbg(bank->chip.gc.parent, "param=%d %d[GPIO]\n", param, pin);
switch (param) {
case PIN_CONFIG_BIAS_DISABLE:
- npcm_gpio_clr(&bank->gc, bank->base + NPCM7XX_GP_N_PU, gpio);
- npcm_gpio_clr(&bank->gc, bank->base + NPCM7XX_GP_N_PD, gpio);
+ npcm_gpio_clr(&bank->chip, bank->base + NPCM7XX_GP_N_PU, gpio);
+ npcm_gpio_clr(&bank->chip, bank->base + NPCM7XX_GP_N_PD, gpio);
break;
case PIN_CONFIG_BIAS_PULL_DOWN:
- npcm_gpio_clr(&bank->gc, bank->base + NPCM7XX_GP_N_PU, gpio);
- npcm_gpio_set(&bank->gc, bank->base + NPCM7XX_GP_N_PD, gpio);
+ npcm_gpio_clr(&bank->chip, bank->base + NPCM7XX_GP_N_PU, gpio);
+ npcm_gpio_set(&bank->chip, bank->base + NPCM7XX_GP_N_PD, gpio);
break;
case PIN_CONFIG_BIAS_PULL_UP:
- npcm_gpio_clr(&bank->gc, bank->base + NPCM7XX_GP_N_PD, gpio);
- npcm_gpio_set(&bank->gc, bank->base + NPCM7XX_GP_N_PU, gpio);
+ npcm_gpio_clr(&bank->chip, bank->base + NPCM7XX_GP_N_PD, gpio);
+ npcm_gpio_set(&bank->chip, bank->base + NPCM7XX_GP_N_PU, gpio);
break;
case PIN_CONFIG_INPUT_ENABLE:
iowrite32(gpio, bank->base + NPCM7XX_GP_N_OEC);
- bank->direction_input(&bank->gc, pin % bank->gc.ngpio);
+ bank->direction_input(&bank->chip.gc, pin % bank->chip.gc.ngpio);
break;
case PIN_CONFIG_OUTPUT:
- bank->direction_output(&bank->gc, pin % bank->gc.ngpio, arg);
+ bank->direction_output(&bank->chip.gc, pin % bank->chip.gc.ngpio, arg);
iowrite32(gpio, bank->base + NPCM7XX_GP_N_OES);
break;
case PIN_CONFIG_DRIVE_PUSH_PULL:
- npcm_gpio_clr(&bank->gc, bank->base + NPCM7XX_GP_N_OTYP, gpio);
+ npcm_gpio_clr(&bank->chip, bank->base + NPCM7XX_GP_N_OTYP, gpio);
break;
case PIN_CONFIG_DRIVE_OPEN_DRAIN:
- npcm_gpio_set(&bank->gc, bank->base + NPCM7XX_GP_N_OTYP, gpio);
+ npcm_gpio_set(&bank->chip, bank->base + NPCM7XX_GP_N_OTYP, gpio);
break;
case PIN_CONFIG_INPUT_DEBOUNCE:
- npcm_gpio_set(&bank->gc, bank->base + NPCM7XX_GP_N_DBNC, gpio);
+ npcm_gpio_set(&bank->chip, bank->base + NPCM7XX_GP_N_DBNC, gpio);
break;
case PIN_CONFIG_SLEW_RATE:
return npcm7xx_set_slew_rate(bank, npcm->gcr_regmap, pin, arg);
@@ -1829,6 +1824,7 @@ static const struct pinctrl_desc npcm7xx_pinctrl_desc = {
static int npcm7xx_gpio_of(struct npcm7xx_pinctrl *pctrl)
{
+ struct gpio_generic_chip_config config;
int ret = -ENXIO;
struct device *dev = pctrl->dev;
struct fwnode_reference_args args;
@@ -1840,15 +1836,18 @@ static int npcm7xx_gpio_of(struct npcm7xx_pinctrl *pctrl)
if (!pctrl->gpio_bank[id].base)
return -EINVAL;
- ret = bgpio_init(&pctrl->gpio_bank[id].gc, dev, 4,
- pctrl->gpio_bank[id].base + NPCM7XX_GP_N_DIN,
- pctrl->gpio_bank[id].base + NPCM7XX_GP_N_DOUT,
- NULL,
- NULL,
- pctrl->gpio_bank[id].base + NPCM7XX_GP_N_IEM,
- BGPIOF_READ_OUTPUT_REG_SET);
+ config = (typeof(config)){
+ .dev = dev,
+ .sz = 4,
+ .dat = pctrl->gpio_bank[id].base + NPCM7XX_GP_N_DIN,
+ .set = pctrl->gpio_bank[id].base + NPCM7XX_GP_N_DOUT,
+ .dirin = pctrl->gpio_bank[id].base + NPCM7XX_GP_N_IEM,
+ .flags = BGPIOF_READ_OUTPUT_REG_SET,
+ };
+
+ ret = gpio_generic_chip_init(&pctrl->gpio_bank[id].chip, &config);
if (ret) {
- dev_err(dev, "bgpio_init() failed\n");
+ dev_err(dev, "failed to initialize the generic GPIO chip\n");
return ret;
}
@@ -1866,23 +1865,23 @@ static int npcm7xx_gpio_of(struct npcm7xx_pinctrl *pctrl)
pctrl->gpio_bank[id].irq = ret;
pctrl->gpio_bank[id].irqbase = id * NPCM7XX_GPIO_PER_BANK;
pctrl->gpio_bank[id].pinctrl_id = args.args[0];
- pctrl->gpio_bank[id].gc.base = args.args[1];
- pctrl->gpio_bank[id].gc.ngpio = args.args[2];
- pctrl->gpio_bank[id].gc.owner = THIS_MODULE;
- pctrl->gpio_bank[id].gc.parent = dev;
- pctrl->gpio_bank[id].gc.fwnode = child;
- pctrl->gpio_bank[id].gc.label = devm_kasprintf(dev, GFP_KERNEL, "%pfw", child);
- if (pctrl->gpio_bank[id].gc.label == NULL)
+ pctrl->gpio_bank[id].chip.gc.base = args.args[1];
+ pctrl->gpio_bank[id].chip.gc.ngpio = args.args[2];
+ pctrl->gpio_bank[id].chip.gc.owner = THIS_MODULE;
+ pctrl->gpio_bank[id].chip.gc.parent = dev;
+ pctrl->gpio_bank[id].chip.gc.fwnode = child;
+ pctrl->gpio_bank[id].chip.gc.label = devm_kasprintf(dev, GFP_KERNEL, "%pfw", child);
+ if (pctrl->gpio_bank[id].chip.gc.label == NULL)
return -ENOMEM;
- pctrl->gpio_bank[id].gc.dbg_show = npcmgpio_dbg_show;
- pctrl->gpio_bank[id].direction_input = pctrl->gpio_bank[id].gc.direction_input;
- pctrl->gpio_bank[id].gc.direction_input = npcmgpio_direction_input;
- pctrl->gpio_bank[id].direction_output = pctrl->gpio_bank[id].gc.direction_output;
- pctrl->gpio_bank[id].gc.direction_output = npcmgpio_direction_output;
- pctrl->gpio_bank[id].request = pctrl->gpio_bank[id].gc.request;
- pctrl->gpio_bank[id].gc.request = npcmgpio_gpio_request;
- pctrl->gpio_bank[id].gc.free = pinctrl_gpio_free;
+ pctrl->gpio_bank[id].chip.gc.dbg_show = npcmgpio_dbg_show;
+ pctrl->gpio_bank[id].direction_input = pctrl->gpio_bank[id].chip.gc.direction_input;
+ pctrl->gpio_bank[id].chip.gc.direction_input = npcmgpio_direction_input;
+ pctrl->gpio_bank[id].direction_output = pctrl->gpio_bank[id].chip.gc.direction_output;
+ pctrl->gpio_bank[id].chip.gc.direction_output = npcmgpio_direction_output;
+ pctrl->gpio_bank[id].request = pctrl->gpio_bank[id].chip.gc.request;
+ pctrl->gpio_bank[id].chip.gc.request = npcmgpio_gpio_request;
+ pctrl->gpio_bank[id].chip.gc.free = pinctrl_gpio_free;
id++;
}
@@ -1897,7 +1896,7 @@ static int npcm7xx_gpio_register(struct npcm7xx_pinctrl *pctrl)
for (id = 0 ; id < pctrl->bank_num ; id++) {
struct gpio_irq_chip *girq;
- girq = &pctrl->gpio_bank[id].gc.irq;
+ girq = &pctrl->gpio_bank[id].chip.gc.irq;
gpio_irq_chip_set_chip(girq, &npcmgpio_irqchip);
girq->parent_handler = npcmgpio_irq_handler;
girq->num_parents = 1;
@@ -1912,21 +1911,21 @@ static int npcm7xx_gpio_register(struct npcm7xx_pinctrl *pctrl)
girq->default_type = IRQ_TYPE_NONE;
girq->handler = handle_level_irq;
ret = devm_gpiochip_add_data(pctrl->dev,
- &pctrl->gpio_bank[id].gc,
+ &pctrl->gpio_bank[id].chip.gc,
&pctrl->gpio_bank[id]);
if (ret) {
dev_err(pctrl->dev, "Failed to add GPIO chip %u\n", id);
goto err_register;
}
- ret = gpiochip_add_pin_range(&pctrl->gpio_bank[id].gc,
+ ret = gpiochip_add_pin_range(&pctrl->gpio_bank[id].chip.gc,
dev_name(pctrl->dev),
pctrl->gpio_bank[id].pinctrl_id,
- pctrl->gpio_bank[id].gc.base,
- pctrl->gpio_bank[id].gc.ngpio);
+ pctrl->gpio_bank[id].chip.gc.base,
+ pctrl->gpio_bank[id].chip.gc.ngpio);
if (ret < 0) {
dev_err(pctrl->dev, "Failed to add GPIO bank %u\n", id);
- gpiochip_remove(&pctrl->gpio_bank[id].gc);
+ gpiochip_remove(&pctrl->gpio_bank[id].chip.gc);
goto err_register;
}
}
@@ -1935,7 +1934,7 @@ static int npcm7xx_gpio_register(struct npcm7xx_pinctrl *pctrl)
err_register:
for (; id > 0; id--)
- gpiochip_remove(&pctrl->gpio_bank[id - 1].gc);
+ gpiochip_remove(&pctrl->gpio_bank[id - 1].chip.gc);
return ret;
}
--
2.48.1
^ permalink raw reply related [flat|nested] 7+ messages in thread* [PATCH 5/5] pinctrl: wpcm450: use new generic GPIO chip API
2025-08-11 15:01 [PATCH 0/5] pinctrl: replace legacy bgpio_init() with its modernized alternative Bartosz Golaszewski
` (3 preceding siblings ...)
2025-08-11 15:02 ` [PATCH 4/5] pinctrl: npcm7xx: " Bartosz Golaszewski
@ 2025-08-11 15:02 ` Bartosz Golaszewski
2025-08-19 9:43 ` [PATCH 0/5] pinctrl: replace legacy bgpio_init() with its modernized alternative Linus Walleij
5 siblings, 0 replies; 7+ messages in thread
From: Bartosz Golaszewski @ 2025-08-11 15:02 UTC (permalink / raw)
To: Clément Le Goffic, Linus Walleij, Maxime Coquelin,
Alexandre Torgue, Bartosz Golaszewski, Avi Fishman, Tomer Maimon,
Tali Perry, Patrick Venture, Nancy Yuen, Benjamin Fair,
Jonathan Neuschäfer
Cc: linux-gpio, linux-stm32, linux-arm-kernel, linux-kernel, openbmc,
Bartosz Golaszewski
From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Convert the driver to using the new generic GPIO chip interfaces from
linux/gpio/generic.h.
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
---
drivers/pinctrl/nuvoton/pinctrl-wpcm450.c | 44 ++++++++++++++++++++-----------
1 file changed, 28 insertions(+), 16 deletions(-)
diff --git a/drivers/pinctrl/nuvoton/pinctrl-wpcm450.c b/drivers/pinctrl/nuvoton/pinctrl-wpcm450.c
index 8d8314ba0e4cb55db2b1d3adf2de07e6fb93c279..4dd8a3daa83e44b0e2780fedb03ab11fa46a4b7d 100644
--- a/drivers/pinctrl/nuvoton/pinctrl-wpcm450.c
+++ b/drivers/pinctrl/nuvoton/pinctrl-wpcm450.c
@@ -11,6 +11,7 @@
#include <linux/device.h>
#include <linux/gpio/driver.h>
+#include <linux/gpio/generic.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/mfd/syscon.h>
@@ -47,7 +48,7 @@ struct wpcm450_pinctrl;
struct wpcm450_bank;
struct wpcm450_gpio {
- struct gpio_chip gc;
+ struct gpio_generic_chip chip;
struct wpcm450_pinctrl *pctrl;
const struct wpcm450_bank *bank;
};
@@ -184,11 +185,12 @@ static void wpcm450_gpio_irq_unmask(struct irq_data *d)
}
/*
- * This is an implementation of the gpio_chip->get() function, for use in
- * wpcm450_gpio_fix_evpol. Unfortunately, we can't use the bgpio-provided
- * implementation there, because it would require taking gpio_chip->bgpio_lock,
- * which is a spin lock, but wpcm450_gpio_fix_evpol must work in contexts where
- * a raw spin lock is held.
+ * FIXME: This is an implementation of the gpio_chip->get() function, for use
+ * in wpcm450_gpio_fix_evpol(). It was implemented back when gpio-mmio used a
+ * regular spinlock internally, while wpcm450_gpio_fix_evpol() needed to work
+ * in contexts with a raw spinlock held. Since then, the gpio generic chip has
+ * been switched to using a raw spinlock so this should be converted to using
+ * the locking interfaces provided in linux/gpio/gneneric.h.
*/
static int wpcm450_gpio_get(struct wpcm450_gpio *gpio, int offset)
{
@@ -329,7 +331,7 @@ static void wpcm450_gpio_irqhandler(struct irq_desc *desc)
for_each_set_bit(bit, &pending, 32) {
int offset = wpcm450_irq_bitnum_to_gpio(gpio, bit);
- generic_handle_domain_irq(gpio->gc.irq.domain, offset);
+ generic_handle_domain_irq(gpio->chip.gc.irq.domain, offset);
}
chained_irq_exit(chip, desc);
}
@@ -1012,7 +1014,7 @@ static int wpcm450_gpio_add_pin_ranges(struct gpio_chip *chip)
struct wpcm450_gpio *gpio = gpiochip_get_data(chip);
const struct wpcm450_bank *bank = gpio->bank;
- return gpiochip_add_pin_range(&gpio->gc, dev_name(gpio->pctrl->dev),
+ return gpiochip_add_pin_range(&gpio->chip.gc, dev_name(gpio->pctrl->dev),
0, bank->base, bank->length);
}
@@ -1029,6 +1031,7 @@ static int wpcm450_gpio_register(struct platform_device *pdev,
"Resource fail for GPIO controller\n");
for_each_gpiochip_node(dev, child) {
+ struct gpio_generic_chip_config config;
void __iomem *dat = NULL;
void __iomem *set = NULL;
void __iomem *dirout = NULL;
@@ -1060,17 +1063,26 @@ static int wpcm450_gpio_register(struct platform_device *pdev,
} else {
flags = BGPIOF_NO_OUTPUT;
}
- ret = bgpio_init(&gpio->gc, dev, 4,
- dat, set, NULL, dirout, NULL, flags);
+
+ config = (typeof(config)){
+ .dev = dev,
+ .sz = 4,
+ .dat = dat,
+ .set = set,
+ .dirout = dirout,
+ .flags = flags,
+ };
+
+ ret = gpio_generic_chip_init(&gpio->chip, &config);
if (ret < 0)
return dev_err_probe(dev, ret, "GPIO initialization failed\n");
- gpio->gc.ngpio = bank->length;
- gpio->gc.set_config = wpcm450_gpio_set_config;
- gpio->gc.fwnode = child;
- gpio->gc.add_pin_ranges = wpcm450_gpio_add_pin_ranges;
+ gpio->chip.gc.ngpio = bank->length;
+ gpio->chip.gc.set_config = wpcm450_gpio_set_config;
+ gpio->chip.gc.fwnode = child;
+ gpio->chip.gc.add_pin_ranges = wpcm450_gpio_add_pin_ranges;
- girq = &gpio->gc.irq;
+ girq = &gpio->chip.gc.irq;
gpio_irq_chip_set_chip(girq, &wpcm450_gpio_irqchip);
girq->parent_handler = wpcm450_gpio_irqhandler;
girq->parents = devm_kcalloc(dev, WPCM450_NUM_GPIO_IRQS,
@@ -1094,7 +1106,7 @@ static int wpcm450_gpio_register(struct platform_device *pdev,
girq->num_parents++;
}
- ret = devm_gpiochip_add_data(dev, &gpio->gc, gpio);
+ ret = devm_gpiochip_add_data(dev, &gpio->chip.gc, gpio);
if (ret)
return dev_err_probe(dev, ret, "Failed to add GPIO chip\n");
}
--
2.48.1
^ permalink raw reply related [flat|nested] 7+ messages in thread* Re: [PATCH 0/5] pinctrl: replace legacy bgpio_init() with its modernized alternative
2025-08-11 15:01 [PATCH 0/5] pinctrl: replace legacy bgpio_init() with its modernized alternative Bartosz Golaszewski
` (4 preceding siblings ...)
2025-08-11 15:02 ` [PATCH 5/5] pinctrl: wpcm450: " Bartosz Golaszewski
@ 2025-08-19 9:43 ` Linus Walleij
5 siblings, 0 replies; 7+ messages in thread
From: Linus Walleij @ 2025-08-19 9:43 UTC (permalink / raw)
To: Bartosz Golaszewski
Cc: Clément Le Goffic, Maxime Coquelin, Alexandre Torgue,
Avi Fishman, Tomer Maimon, Tali Perry, Patrick Venture,
Nancy Yuen, Benjamin Fair, Jonathan Neuschäfer, linux-gpio,
linux-stm32, linux-arm-kernel, linux-kernel, openbmc,
Bartosz Golaszewski
On Mon, Aug 11, 2025 at 5:02 PM Bartosz Golaszewski <brgl@bgdev.pl> wrote:
> We are in the process of modernizing the gpio-mmio interface. This
> series converts all pinctrl drivers calling bgpio_init() to using the
> new variant from linux/gpio/generic.h.
>
> Linus: Please create an immutable branch containing these commits once
> queued as I'll have some more changes comming on top of them - most
> importantly: removing the old interface. I will need them in my tree.
All patches applied to this immutable branch based on v6.17-rc1:
https://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl.git/log/?h=ib-gpio_generic_chip_init
Then I have merged this to my devel branch.
Yours,
Linus Walleij
^ permalink raw reply [flat|nested] 7+ messages in thread