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drivers/leds/leds-pca9532.c: add support pca9530, pca9531 and pca9533
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The pca953x family are only different in number of leds and register
layout Adding chipinfo to use driver with whole pca953x family Rename
driver to pca953x, but left files and platformflags named pca9532.

Tested with pca9530 and pca9533

Tested-by: Juergen Kilb <j.kilb@phytec.de>
Signed-off-by: Jan Weitzel <j.weitzel@phytec.de>
Acked-by: Joachim Eastwood <joachim.eastwood@jotron.com>
Tested-by: Joachim Eastwood <joachim.eastwood@jotron.com>
Cc: Wolfram Sang <w.sang@pengutronix.de>
Cc: H Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Cc: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Jan Weitzel authored and Linus Torvalds committed May 25, 2011
1 parent 3c1ab50 commit 3dbf622
Showing 1 changed file with 62 additions and 22 deletions.
84 changes: 62 additions & 22 deletions drivers/leds/leds-pca9532.c
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Original file line number Diff line number Diff line change
@@ -1,13 +1,14 @@
/*
* 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
*
*/

Expand All @@ -21,15 +22,20 @@
#include <linux/leds-pca9532.h>
#include <linux/gpio.h>

#define PCA9532_REG_INPUT(i) ((i)/8)
#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];
Expand All @@ -39,6 +45,7 @@ struct pca9532_data {
#ifdef CONFIG_LEDS_PCA9532_GPIO
struct gpio_chip gpio;
#endif
const struct pca9532_chip_info *chip_info;
u8 pwm[2];
u8 psc[2];
};
Expand All @@ -47,16 +54,41 @@ static int pca9532_probe(struct i2c_client *client,
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,
Expand All @@ -73,7 +105,7 @@ static int pca9532_calcpwm(struct i2c_client *client, int pwm, int blink,
{
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++;
Expand All @@ -97,10 +129,12 @@ static int pca9532_calcpwm(struct i2c_client *client, int pwm, int blink,
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;
Expand All @@ -111,15 +145,16 @@ static void pca9532_setled(struct pca9532_led *led)
{
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);
}

Expand Down Expand Up @@ -188,10 +223,12 @@ static int pca9532_event(struct input_dev *dev, unsigned int type,

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);
}
Expand Down Expand Up @@ -301,17 +338,18 @@ static int pca9532_configure(struct i2c_client *client,
{
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;
Expand Down Expand Up @@ -382,7 +420,7 @@ static int pca9532_configure(struct i2c_client *client,
data->gpio.request = pca9532_gpio_request_pin;
data->gpio.can_sleep = 1;
data->gpio.base = pdata->gpio_base;
data->gpio.ngpio = 16;
data->gpio.ngpio = data->chip_info->num_leds;
data->gpio.dev = &client->dev;
data->gpio.owner = THIS_MODULE;

Expand Down Expand Up @@ -424,6 +462,8 @@ static int pca9532_probe(struct i2c_client *client,
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;
Expand All @@ -441,7 +481,7 @@ static int pca9532_remove(struct i2c_client *client)
struct pca9532_data *data = i2c_get_clientdata(client);
int err;

err = pca9532_destroy_devices(data, 16);
err = pca9532_destroy_devices(data, data->chip_info->num_leds);
if (err)
return err;

Expand Down

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