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leds:pca963x: Add support for PCA9635 LED driver chip 

supports 16 PWM-controlled LEDs

Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net>
Signed-off-by: Bryan Wu <cooloney@gmail.com>
hifive-unleashed-5.1
Peter Meerwald 2014-07-02 22:50:34 -07:00 committed by Bryan Wu
parent 6522fe1c39
commit 3dfedb9d54
1 changed files with 13 additions and 5 deletions
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18
drivers/leds/leds-pca963x.c
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@ -12,7 +12,7 @@
* directory of this archive for more details.
*
* LED driver for the PCA9633 I2C LED driver (7-bit slave address 0x62)
* LED driver for the PCA9634 I2C LED driver (7-bit slave address set by hw.)
* LED driver for the PCA9634/5 I2C LED driver (7-bit slave address set by hw.)
*
* Note that hardware blinking violates the leds infrastructure driver
* interface since the hardware only supports blinking all LEDs with the
@ -52,6 +52,7 @@
enum pca963x_type {
pca9633,
pca9634,
pca9635,
};
struct pca963x_chipdef {
@ -74,6 +75,12 @@ static struct pca963x_chipdef pca963x_chipdefs[] = {
.ledout_base = 0xc,
.n_leds = 8,
},
[pca9635] = {
.grppwm = 0x12,
.grpfreq = 0x13,
.ledout_base = 0x14,
.n_leds = 16,
},
};
/* Total blink period in milliseconds */
@ -84,6 +91,7 @@ static const struct i2c_device_id pca963x_id[] = {
{ "pca9632", pca9633 },
{ "pca9633", pca9633 },
{ "pca9634", pca9634 },
{ "pca9635", pca9635 },
{ }
};
MODULE_DEVICE_TABLE(i2c, pca963x_id);
@ -107,7 +115,7 @@ struct pca963x_led {
struct work_struct work;
enum led_brightness brightness;
struct led_classdev led_cdev;
int led_num; /* 0 .. 7 potentially */
int led_num; /* 0 .. 15 potentially */
enum pca963x_cmd cmd;
char name[32];
u8 gdc;
@ -321,6 +329,7 @@ static const struct of_device_id of_pca963x_match[] = {
{ .compatible = "nxp,pca9632", },
{ .compatible = "nxp,pca9633", },
{ .compatible = "nxp,pca9634", },
{ .compatible = "nxp,pca9635", },
{},
};
#else
@ -375,9 +384,8 @@ static int pca963x_probe(struct i2c_client *client,
pca963x_chip->leds = pca963x;
/* Turn off LEDs by default*/
i2c_smbus_write_byte_data(client, chip->ledout_base, 0x00);
if (chip->n_leds > 4)
i2c_smbus_write_byte_data(client, chip->ledout_base + 1, 0x00);
for (i = 0; i < chip->n_leds / 4; i++)
i2c_smbus_write_byte_data(client, chip->ledout_base + i, 0x00);
for (i = 0; i < chip->n_leds; i++) {
pca963x[i].led_num = i;