// SPDX-License-Identifier: GPL-2.0-only
/*
* Awinic AW9523B i2c pin controller driver
- * Copyright (c) 2020, AngeloGioacchino Del Regno
- * <angelogioacchino.delregno@somainline.org>
+ * Copyright (c) 2020, AngeloGioacchino Del Regno <angelogioacchino.delregno@somainline.org>
*/
#include <linux/bitfield.h>
+#include <linux/errno.h>
#include <linux/gpio/consumer.h>
#include <linux/gpio/driver.h>
#include <linux/i2c.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
-#include <linux/mutex.h>
#include <linux/module.h>
-#include <linux/pinctrl/pinconf.h>
-#include <linux/pinctrl/pinctrl.h>
-#include <linux/pinctrl/pinmux.h>
-#include <linux/pinctrl/pinconf-generic.h>
+#include <linux/mutex.h>
#include <linux/property.h>
#include <linux/regmap.h>
#include <linux/regulator/consumer.h>
#include <linux/slab.h>
+#include <linux/pinctrl/pinconf-generic.h>
+#include <linux/pinctrl/pinconf.h>
+#include <linux/pinctrl/pinctrl.h>
+#include <linux/pinctrl/pinmux.h>
+
#define AW9523_MAX_FUNCS 2
#define AW9523_NUM_PORTS 2
#define AW9523_PINS_PER_PORT 8
/*
* struct aw9523_irq - Interrupt controller structure
* @lock: mutex locking for the irq bus
- * @irqchip: structure holding irqchip params
* @cached_gpio: stores the previous gpio status for bit comparison
*/
struct aw9523_irq {
struct mutex lock;
- struct irq_chip *irqchip;
u16 cached_gpio;
};
-/*
- * struct aw9523_pinmux - Pin mux params
- * @name: Name of the mux
- * @grps: Groups of the mux
- * @num_grps: Number of groups (sizeof array grps)
- */
-struct aw9523_pinmux {
- const char *name;
- const char * const *grps;
- const u8 num_grps;
-};
-
/*
* struct aw9523 - Main driver structure
* @dev: device handle
};
static const char * const gpio_pwm_groups[] = {
- "gpio0", "gpio1", "gpio2", "gpio3", "gpio4", "gpio5",
- "gpio6", "gpio7", "gpio8", "gpio9", "gpio10", "gpio11",
- "gpio12", "gpio13", "gpio14", "gpio15"
+ "gpio0", "gpio1", "gpio2", "gpio3", /* 0-3 */
+ "gpio4", "gpio5", "gpio6", "gpio7", /* 4-7 */
+ "gpio8", "gpio9", "gpio10", "gpio11", /* 8-11 */
+ "gpio12", "gpio13", "gpio14", "gpio15", /* 11-15 */
};
/* Warning: Do NOT reorder this array */
-static const struct aw9523_pinmux aw9523_pmx[] = {
- {
- .name = "pwm",
- .grps = gpio_pwm_groups,
- .num_grps = ARRAY_SIZE(gpio_pwm_groups),
- },
- {
- .name = "gpio",
- .grps = gpio_pwm_groups,
- .num_grps = ARRAY_SIZE(gpio_pwm_groups),
- },
+static const struct pinfunction aw9523_pmx[] = {
+ PINCTRL_PINFUNCTION("pwm", gpio_pwm_groups, ARRAY_SIZE(gpio_pwm_groups)),
+ PINCTRL_PINFUNCTION("gpio", gpio_pwm_groups, ARRAY_SIZE(gpio_pwm_groups)),
};
static int aw9523_pmx_get_funcs_count(struct pinctrl_dev *pctl)
static int aw9523_pmx_get_groups(struct pinctrl_dev *pctl, unsigned int sel,
const char * const **groups,
- unsigned int * const num_groups)
+ unsigned int * const ngroups)
{
- *groups = aw9523_pmx[sel].grps;
- *num_groups = aw9523_pmx[sel].num_grps;
+ *groups = aw9523_pmx[sel].groups;
+ *ngroups = aw9523_pmx[sel].ngroups;
return 0;
}
reg = AW9523_REG_OUT_STATE(pin);
break;
default:
- return -EOPNOTSUPP;
+ return -ENOTSUPP;
}
*r = reg;
val = FIELD_GET(AW9523_GCR_GPOMD_MASK, val);
break;
default:
- return -EOPNOTSUPP;
+ return -ENOTSUPP;
}
if (val < 1)
return -EINVAL;
case PIN_CONFIG_DRIVE_OPEN_DRAIN:
/* Open-Drain is supported only on port 0 */
if (pin >= AW9523_PINS_PER_PORT) {
- rc = -EOPNOTSUPP;
+ rc = -ENOTSUPP;
goto end;
}
mask = AW9523_GCR_GPOMD_MASK;
val = AW9523_GCR_GPOMD_MASK;
break;
default:
- rc = -EOPNOTSUPP;
+ rc = -ENOTSUPP;
goto end;
}
*
* Return: Zero for success or negative number for error
*/
-static int aw9523_get_port_state(struct regmap *regmap, u8 pin,
- u8 regbit, unsigned int *state)
+static int aw9523_get_port_state(struct regmap *regmap, u8 pin, u8 regbit,
+ unsigned int *state)
{
u8 reg;
int dir;
static void aw9523_irq_mask(struct irq_data *d)
{
struct aw9523 *awi = gpiochip_get_data(irq_data_get_irq_chip_data(d));
- unsigned int n = d->hwirq % AW9523_PINS_PER_PORT;
+ irq_hw_number_t hwirq = irqd_to_hwirq(d);
+ unsigned int n = hwirq % AW9523_PINS_PER_PORT;
- regmap_update_bits(awi->regmap,
- AW9523_REG_INTR_DIS(d->hwirq),
+ regmap_update_bits(awi->regmap, AW9523_REG_INTR_DIS(hwirq),
BIT(n), BIT(n));
- gpiochip_disable_irq(&awi->gpio, irqd_to_hwirq(d));
+ gpiochip_disable_irq(&awi->gpio, hwirq);
}
/*
static void aw9523_irq_unmask(struct irq_data *d)
{
struct aw9523 *awi = gpiochip_get_data(irq_data_get_irq_chip_data(d));
- unsigned int n = d->hwirq % AW9523_PINS_PER_PORT;
+ irq_hw_number_t hwirq = irqd_to_hwirq(d);
+ unsigned int n = hwirq % AW9523_PINS_PER_PORT;
- gpiochip_enable_irq(&awi->gpio, irqd_to_hwirq(d));
- regmap_update_bits(awi->regmap,
- AW9523_REG_INTR_DIS(d->hwirq),
+ gpiochip_enable_irq(&awi->gpio, hwirq);
+ regmap_update_bits(awi->regmap, AW9523_REG_INTR_DIS(hwirq),
BIT(n), 0);
}
mutex_lock(&awi->i2c_lock);
/* Port 0 (gpio 0-7) */
- m = *mask & U8_MAX;
+ m = *mask;
if (m) {
ret = _aw9523_gpio_get_multiple(awi, 0, &state, m);
if (ret)
*bits = state;
/* Port 1 (gpio 8-15) */
- m = (*mask >> 8) & U8_MAX;
+ m = *mask >> 8;
if (m) {
ret = _aw9523_gpio_get_multiple(awi, AW9523_PINS_PER_PORT,
&state, m);
struct aw9523 *awi = gpiochip_get_data(chip);
u8 mask_lo, mask_hi, bits_lo, bits_hi;
unsigned int reg;
- int ret = 0;
+ int ret;
+
+ mask_lo = *mask;
+ mask_hi = *mask >> 8;
+ bits_lo = *bits;
+ bits_hi = *bits >> 8;
- mask_lo = *mask & U8_MAX;
- mask_hi = (*mask >> 8) & U8_MAX;
mutex_lock(&awi->i2c_lock);
if (mask_hi) {
reg = AW9523_REG_OUT_STATE(AW9523_PINS_PER_PORT);
- bits_hi = (*bits >> 8) & U8_MAX;
-
ret = regmap_write_bits(awi->regmap, reg, mask_hi, bits_hi);
- if (ret) {
+ if (ret)
dev_warn(awi->dev, "Cannot write port1 out level\n");
- goto out;
- }
}
if (mask_lo) {
reg = AW9523_REG_OUT_STATE(0);
- bits_lo = *bits & U8_MAX;
ret = regmap_write_bits(awi->regmap, reg, mask_lo, bits_lo);
if (ret)
dev_warn(awi->dev, "Cannot write port0 out level\n");
}
-out:
mutex_unlock(&awi->i2c_lock);
}
{
struct device *dev = awi->dev;
struct gpio_irq_chip *girq;
- struct irq_chip *irqchip;
int ret;
if (!device_property_read_bool(dev, "interrupt-controller"))
return 0;
- irqchip = devm_kzalloc(dev, sizeof(*irqchip), GFP_KERNEL);
- if (!irqchip)
- return -ENOMEM;
-
awi->irq = devm_kzalloc(dev, sizeof(*awi->irq), GFP_KERNEL);
if (!awi->irq)
return -ENOMEM;
- awi->irq->irqchip = irqchip;
mutex_init(&awi->irq->lock);
ret = devm_request_threaded_irq(dev, irq, NULL, aw9523_irq_thread_func,
IRQF_ONESHOT, dev_name(dev), awi);
- if (ret) {
- dev_err(dev, "Failed to request irq %d\n", irq);
- return ret;
- }
+ if (ret)
+ return dev_err_probe(dev, ret, "Failed to request irq %d\n", irq);
girq = &awi->gpio.irq;
gpio_irq_chip_set_chip(girq, &aw9523_irq_chip);
}
mutex_init(&awi->i2c_lock);
- lockdep_set_subclass(&awi->i2c_lock,
- i2c_adapter_depth(client->adapter));
+ lockdep_set_subclass(&awi->i2c_lock, i2c_adapter_depth(client->adapter));
pdesc = devm_kzalloc(dev, sizeof(*pdesc), GFP_KERNEL);
if (!pdesc)
awi->pctl = devm_pinctrl_register(dev, pdesc, awi);
if (IS_ERR(awi->pctl)) {
- ret = PTR_ERR(awi->pctl);
- dev_err(dev, "Cannot register pinctrl: %d", ret);
+ ret = dev_err_probe(dev, PTR_ERR(awi->pctl), "Cannot register pinctrl");
goto err_disable_vregs;
}
static void aw9523_remove(struct i2c_client *client)
{
struct aw9523 *awi = i2c_get_clientdata(client);
- int ret;
-
- if (!awi)
- return;
/*
* If the chip VIO is connected to a regulator that we can turn
regulator_disable(awi->vio_vreg);
} else {
mutex_lock(&awi->i2c_lock);
- ret = aw9523_hw_init(awi);
+ aw9523_hw_init(awi);
mutex_unlock(&awi->i2c_lock);
- if (ret)
- return;
}
mutex_destroy(&awi->i2c_lock);
projects / linux-2.6-block.git / blobdiff