/*
* pca9532.c - 16-bit Led dimmer
*
+ * Copyright (C) 2011 Jan Weitzel
* Copyright (C) 2008 Riku Voipio
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
- * Datasheet: http://www.nxp.com/acrobat/datasheets/PCA9532_3.pdf
+ * Datasheet: http://www.nxp.com/documents/data_sheet/PCA9532.pdf
*
*/
#include <linux/mutex.h>
#include <linux/workqueue.h>
#include <linux/leds-pca9532.h>
+#include <linux/gpio.h>
-#define PCA9532_REG_PSC(i) (0x2+(i)*2)
-#define PCA9532_REG_PWM(i) (0x3+(i)*2)
-#define PCA9532_REG_LS0 0x6
-#define LED_REG(led) ((led>>2)+PCA9532_REG_LS0)
-#define LED_NUM(led) (led & 0x3)
+/* m = num_leds*/
+#define PCA9532_REG_INPUT(i) ((i) >> 3)
+#define PCA9532_REG_OFFSET(m) ((m) >> 4)
+#define PCA9532_REG_PSC(m, i) (PCA9532_REG_OFFSET(m) + 0x1 + (i) * 2)
+#define PCA9532_REG_PWM(m, i) (PCA9532_REG_OFFSET(m) + 0x2 + (i) * 2)
+#define LED_REG(m, led) (PCA9532_REG_OFFSET(m) + 0x5 + (led >> 2))
+#define LED_NUM(led) (led & 0x3)
#define ldev_to_led(c) container_of(c, struct pca9532_led, ldev)
+struct pca9532_chip_info {
+ u8 num_leds;
+};
+
struct pca9532_data {
struct i2c_client *client;
struct pca9532_led leds[16];
struct mutex update_lock;
struct input_dev *idev;
struct work_struct work;
+#ifdef CONFIG_LEDS_PCA9532_GPIO
+ struct gpio_chip gpio;
+#endif
+ const struct pca9532_chip_info *chip_info;
u8 pwm[2];
u8 psc[2];
};
const struct i2c_device_id *id);
static int pca9532_remove(struct i2c_client *client);
+enum {
+ pca9530,
+ pca9531,
+ pca9532,
+ pca9533,
+};
+
static const struct i2c_device_id pca9532_id[] = {
- { "pca9532", 0 },
+ { "pca9530", pca9530 },
+ { "pca9531", pca9531 },
+ { "pca9532", pca9532 },
+ { "pca9533", pca9533 },
{ }
};
MODULE_DEVICE_TABLE(i2c, pca9532_id);
+static const struct pca9532_chip_info pca9532_chip_info_tbl[] = {
+ [pca9530] = {
+ .num_leds = 2,
+ },
+ [pca9531] = {
+ .num_leds = 8,
+ },
+ [pca9532] = {
+ .num_leds = 16,
+ },
+ [pca9533] = {
+ .num_leds = 4,
+ },
+};
+
static struct i2c_driver pca9532_driver = {
.driver = {
- .name = "pca9532",
+ .name = "pca953x",
},
.probe = pca9532_probe,
.remove = pca9532_remove,
{
int a = 0, b = 0, i = 0;
struct pca9532_data *data = i2c_get_clientdata(client);
- for (i = 0; i < 16; i++) {
+ for (i = 0; i < data->chip_info->num_leds; i++) {
if (data->leds[i].type == PCA9532_TYPE_LED &&
data->leds[i].state == PCA9532_PWM0+pwm) {
a++;
static int pca9532_setpwm(struct i2c_client *client, int pwm)
{
struct pca9532_data *data = i2c_get_clientdata(client);
+ u8 maxleds = data->chip_info->num_leds;
+
mutex_lock(&data->update_lock);
- i2c_smbus_write_byte_data(client, PCA9532_REG_PWM(pwm),
+ i2c_smbus_write_byte_data(client, PCA9532_REG_PWM(maxleds, pwm),
data->pwm[pwm]);
- i2c_smbus_write_byte_data(client, PCA9532_REG_PSC(pwm),
+ i2c_smbus_write_byte_data(client, PCA9532_REG_PSC(maxleds, pwm),
data->psc[pwm]);
mutex_unlock(&data->update_lock);
return 0;
{
struct i2c_client *client = led->client;
struct pca9532_data *data = i2c_get_clientdata(client);
+ u8 maxleds = data->chip_info->num_leds;
char reg;
mutex_lock(&data->update_lock);
- reg = i2c_smbus_read_byte_data(client, LED_REG(led->id));
+ reg = i2c_smbus_read_byte_data(client, LED_REG(maxleds, led->id));
/* zero led bits */
reg = reg & ~(0x3<<LED_NUM(led->id)*2);
/* set the new value */
reg = reg | (led->state << LED_NUM(led->id)*2);
- i2c_smbus_write_byte_data(client, LED_REG(led->id), reg);
+ i2c_smbus_write_byte_data(client, LED_REG(maxleds, led->id), reg);
mutex_unlock(&data->update_lock);
}
static void pca9532_input_work(struct work_struct *work)
{
- struct pca9532_data *data;
- data = container_of(work, struct pca9532_data, work);
+ struct pca9532_data *data =
+ container_of(work, struct pca9532_data, work);
+ u8 maxleds = data->chip_info->num_leds;
+
mutex_lock(&data->update_lock);
- i2c_smbus_write_byte_data(data->client, PCA9532_REG_PWM(1),
+ i2c_smbus_write_byte_data(data->client, PCA9532_REG_PWM(maxleds, 1),
data->pwm[1]);
mutex_unlock(&data->update_lock);
}
pca9532_setled(led);
}
-static void pca9532_destroy_devices(struct pca9532_data *data, int n_devs)
+#ifdef CONFIG_LEDS_PCA9532_GPIO
+static int pca9532_gpio_request_pin(struct gpio_chip *gc, unsigned offset)
+{
+ struct pca9532_data *data = container_of(gc, struct pca9532_data, gpio);
+ struct pca9532_led *led = &data->leds[offset];
+
+ if (led->type == PCA9532_TYPE_GPIO)
+ return 0;
+
+ return -EBUSY;
+}
+
+static void pca9532_gpio_set_value(struct gpio_chip *gc, unsigned offset, int val)
+{
+ struct pca9532_data *data = container_of(gc, struct pca9532_data, gpio);
+ struct pca9532_led *led = &data->leds[offset];
+
+ if (val)
+ led->state = PCA9532_ON;
+ else
+ led->state = PCA9532_OFF;
+
+ pca9532_setled(led);
+}
+
+static int pca9532_gpio_get_value(struct gpio_chip *gc, unsigned offset)
+{
+ struct pca9532_data *data = container_of(gc, struct pca9532_data, gpio);
+ unsigned char reg;
+
+ reg = i2c_smbus_read_byte_data(data->client, PCA9532_REG_INPUT(offset));
+
+ return !!(reg & (1 << (offset % 8)));
+}
+
+static int pca9532_gpio_direction_input(struct gpio_chip *gc, unsigned offset)
+{
+ /* To use as input ensure pin is not driven */
+ pca9532_gpio_set_value(gc, offset, 0);
+
+ return 0;
+}
+
+static int pca9532_gpio_direction_output(struct gpio_chip *gc, unsigned offset, int val)
+{
+ pca9532_gpio_set_value(gc, offset, val);
+
+ return 0;
+}
+#endif /* CONFIG_LEDS_PCA9532_GPIO */
+
+static int pca9532_destroy_devices(struct pca9532_data *data, int n_devs)
{
int i = n_devs;
if (!data)
- return;
+ return -EINVAL;
while (--i >= 0) {
switch (data->leds[i].type) {
case PCA9532_TYPE_NONE:
+ case PCA9532_TYPE_GPIO:
break;
case PCA9532_TYPE_LED:
led_classdev_unregister(&data->leds[i].ldev);
break;
}
}
+
+#ifdef CONFIG_LEDS_PCA9532_GPIO
+ if (data->gpio.dev) {
+ int err = gpiochip_remove(&data->gpio);
+ if (err) {
+ dev_err(&data->client->dev, "%s failed, %d\n",
+ "gpiochip_remove()", err);
+ return err;
+ }
+ }
+#endif
+
+ return 0;
}
static int pca9532_configure(struct i2c_client *client,
struct pca9532_data *data, struct pca9532_platform_data *pdata)
{
int i, err = 0;
+ int gpios = 0;
+ u8 maxleds = data->chip_info->num_leds;
for (i = 0; i < 2; i++) {
data->pwm[i] = pdata->pwm[i];
data->psc[i] = pdata->psc[i];
- i2c_smbus_write_byte_data(client, PCA9532_REG_PWM(i),
+ i2c_smbus_write_byte_data(client, PCA9532_REG_PWM(maxleds, i),
data->pwm[i]);
- i2c_smbus_write_byte_data(client, PCA9532_REG_PSC(i),
+ i2c_smbus_write_byte_data(client, PCA9532_REG_PSC(maxleds, i),
data->psc[i]);
}
- for (i = 0; i < 16; i++) {
+ for (i = 0; i < data->chip_info->num_leds; i++) {
struct pca9532_led *led = &data->leds[i];
struct pca9532_led *pled = &pdata->leds[i];
led->client = client;
switch (led->type) {
case PCA9532_TYPE_NONE:
break;
+ case PCA9532_TYPE_GPIO:
+ gpios++;
+ break;
case PCA9532_TYPE_LED:
led->state = pled->state;
led->name = pled->name;
break;
}
}
+
+#ifdef CONFIG_LEDS_PCA9532_GPIO
+ if (gpios) {
+ data->gpio.label = "gpio-pca9532";
+ data->gpio.direction_input = pca9532_gpio_direction_input;
+ data->gpio.direction_output = pca9532_gpio_direction_output;
+ data->gpio.set = pca9532_gpio_set_value;
+ data->gpio.get = pca9532_gpio_get_value;
+ data->gpio.request = pca9532_gpio_request_pin;
+ data->gpio.can_sleep = 1;
+ data->gpio.base = pdata->gpio_base;
+ data->gpio.ngpio = data->chip_info->num_leds;
+ data->gpio.dev = &client->dev;
+ data->gpio.owner = THIS_MODULE;
+
+ err = gpiochip_add(&data->gpio);
+ if (err) {
+ /* Use data->gpio.dev as a flag for freeing gpiochip */
+ data->gpio.dev = NULL;
+ dev_warn(&client->dev, "could not add gpiochip\n");
+ } else {
+ dev_info(&client->dev, "gpios %i...%i\n",
+ data->gpio.base, data->gpio.base +
+ data->gpio.ngpio - 1);
+ }
+ }
+#endif
+
return 0;
exit:
if (!data)
return -ENOMEM;
+ data->chip_info = &pca9532_chip_info_tbl[id->driver_data];
+
dev_info(&client->dev, "setting platform data\n");
i2c_set_clientdata(client, data);
data->client = client;
static int pca9532_remove(struct i2c_client *client)
{
struct pca9532_data *data = i2c_get_clientdata(client);
- pca9532_destroy_devices(data, 16);
+ int err;
+
+ err = pca9532_destroy_devices(data, data->chip_info->num_leds);
+ if (err)
+ return err;
+
kfree(data);
return 0;
}
projects / firefly-linux-kernel-4.4.55.git / blobdiff