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author | Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com> | 2013-08-14 23:23:47 +0200 |
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committer | Bryan Wu <cooloney@gmail.com> | 2013-08-27 02:22:14 +0200 |
commit | af67384f011e81ea86aef8aec51e62e775432ea8 (patch) | |
tree | 13272f7651922ed504162fd281e1c094b411c4ff /drivers/leds | |
parent | leds: lp5562: use LP55xx common macros for device attributes (diff) | |
download | linux-af67384f011e81ea86aef8aec51e62e775432ea8.tar.xz linux-af67384f011e81ea86aef8aec51e62e775432ea8.zip |
leds-pca9633: Add support for PCA9634
Add support for PCA9634 chip, which belongs to the same family as the
9633 but with support for 8 outputs instead of 4.
Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Signed-off-by: Bryan Wu <cooloney@gmail.com>
Diffstat (limited to 'drivers/leds')
-rw-r--r-- | drivers/leds/Kconfig | 7 | ||||
-rw-r--r-- | drivers/leds/leds-pca9633.c | 108 |
2 files changed, 79 insertions, 36 deletions
diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig index f2c738d02872..e7977aa3ee59 100644 --- a/drivers/leds/Kconfig +++ b/drivers/leds/Kconfig @@ -292,12 +292,13 @@ config LEDS_PCA955X devices include PCA9550, PCA9551, PCA9552, and PCA9553. config LEDS_PCA9633 - tristate "LED support for PCA9633 I2C chip" + tristate "LED support for PCA963x I2C chip" depends on LEDS_CLASS depends on I2C help - This option enables support for LEDs connected to the PCA9633 - LED driver chip accessed via the I2C bus. + This option enables support for LEDs connected to the PCA963x + LED driver chip accessed via the I2C bus. Supported + devices include PCA9633 and PCA9634 config LEDS_WM831X_STATUS tristate "LED support for status LEDs on WM831x PMICs" diff --git a/drivers/leds/leds-pca9633.c b/drivers/leds/leds-pca9633.c index ecd1449b1eb6..e59ca0a1d189 100644 --- a/drivers/leds/leds-pca9633.c +++ b/drivers/leds/leds-pca9633.c @@ -1,7 +1,9 @@ /* * Copyright 2011 bct electronic GmbH + * Copyright 2013 Qtechnology/AS * * Author: Peter Meerwald <p.meerwald@bct-electronic.com> + * Author: Ricardo Ribalda <ricardo.ribalda@gmail.com> * * Based on leds-pca955x.c * @@ -10,6 +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.) * * Note that hardware blinking violates the leds infrastructure driver * interface since the hardware only supports blinking all LEDs with the @@ -45,16 +48,42 @@ #define PCA9633_MODE1 0x00 #define PCA9633_MODE2 0x01 #define PCA9633_PWM_BASE 0x02 -#define PCA9633_GRPPWM 0x06 -#define PCA9633_GRPFREQ 0x07 -#define PCA9633_LEDOUT 0x08 + +enum pca9633_type { + pca9633, + pca9634, +}; + +struct pca9633_chipdef { + u8 grppwm; + u8 grpfreq; + u8 ledout_base; + int n_leds; +}; + +static struct pca9633_chipdef pca9633_chipdefs[] = { + [pca9633] = { + .grppwm = 0x6, + .grpfreq = 0x7, + .ledout_base = 0x8, + .n_leds = 4, + }, + [pca9634] = { + .grppwm = 0xa, + .grpfreq = 0xb, + .ledout_base = 0xc, + .n_leds = 8, + }, +}; /* Total blink period in milliseconds */ #define PCA9632_BLINK_PERIOD_MIN 42 #define PCA9632_BLINK_PERIOD_MAX 10667 static const struct i2c_device_id pca9633_id[] = { - { "pca9633", 0 }, + { "pca9632", pca9633 }, + { "pca9633", pca9633 }, + { "pca9634", pca9634 }, { } }; MODULE_DEVICE_TABLE(i2c, pca9633_id); @@ -66,10 +95,11 @@ enum pca9633_cmd { struct pca9633_led { struct i2c_client *client; + struct pca9633_chipdef *chipdef; struct work_struct work; enum led_brightness brightness; struct led_classdev led_cdev; - int led_num; /* 0 .. 3 potentially */ + int led_num; /* 0 .. 7 potentially */ enum pca9633_cmd cmd; char name[32]; u8 gdc; @@ -78,24 +108,26 @@ struct pca9633_led { static void pca9633_brightness_work(struct pca9633_led *pca9633) { - u8 ledout = i2c_smbus_read_byte_data(pca9633->client, PCA9633_LEDOUT); - int shift = 2 * pca9633->led_num; + u8 ledout_addr = pca9633->chipdef->ledout_base + (pca9633->led_num / 4); + u8 ledout; + int shift = 2 * (pca9633->led_num % 4); u8 mask = 0x3 << shift; + ledout = i2c_smbus_read_byte_data(pca9633->client, ledout_addr); switch (pca9633->brightness) { case LED_FULL: - i2c_smbus_write_byte_data(pca9633->client, PCA9633_LEDOUT, + i2c_smbus_write_byte_data(pca9633->client, ledout_addr, (ledout & ~mask) | (PCA9633_LED_ON << shift)); break; case LED_OFF: - i2c_smbus_write_byte_data(pca9633->client, PCA9633_LEDOUT, + i2c_smbus_write_byte_data(pca9633->client, ledout_addr, ledout & ~mask); break; default: i2c_smbus_write_byte_data(pca9633->client, PCA9633_PWM_BASE + pca9633->led_num, pca9633->brightness); - i2c_smbus_write_byte_data(pca9633->client, PCA9633_LEDOUT, + i2c_smbus_write_byte_data(pca9633->client, ledout_addr, (ledout & ~mask) | (PCA9633_LED_PWM << shift)); break; } @@ -103,15 +135,16 @@ static void pca9633_brightness_work(struct pca9633_led *pca9633) static void pca9633_blink_work(struct pca9633_led *pca9633) { - u8 ledout = i2c_smbus_read_byte_data(pca9633->client, PCA9633_LEDOUT); + u8 ledout_addr = pca9633->chipdef->ledout_base + (pca9633->led_num / 4); + u8 ledout = i2c_smbus_read_byte_data(pca9633->client, ledout_addr); u8 mode2 = i2c_smbus_read_byte_data(pca9633->client, PCA9633_MODE2); - int shift = 2 * pca9633->led_num; + int shift = 2 * (pca9633->led_num % 4); u8 mask = 0x3 << shift; - i2c_smbus_write_byte_data(pca9633->client, PCA9633_GRPPWM, + i2c_smbus_write_byte_data(pca9633->client, pca9633->chipdef->grppwm, pca9633->gdc); - i2c_smbus_write_byte_data(pca9633->client, PCA9633_GRPFREQ, + i2c_smbus_write_byte_data(pca9633->client, pca9633->chipdef->grpfreq, pca9633->gfrq); if (!(mode2 & PCA9633_MODE2_DMBLNK)) @@ -119,7 +152,7 @@ static void pca9633_blink_work(struct pca9633_led *pca9633) mode2 | PCA9633_MODE2_DMBLNK); if ((ledout & mask) != (PCA9633_LED_GRP_PWM << shift)) - i2c_smbus_write_byte_data(pca9633->client, PCA9633_LEDOUT, + i2c_smbus_write_byte_data(pca9633->client, ledout_addr, (ledout & ~mask) | (PCA9633_LED_GRP_PWM << shift)); } @@ -215,7 +248,7 @@ static int pca9633_blink_set(struct led_classdev *led_cdev, #if IS_ENABLED(CONFIG_OF) static struct pca9633_platform_data * -pca9633_dt_init(struct i2c_client *client) +pca9633_dt_init(struct i2c_client *client, struct pca9633_chipdef *chip) { struct device_node *np = client->dev.of_node, *child; struct pca9633_platform_data *pdata; @@ -223,11 +256,11 @@ pca9633_dt_init(struct i2c_client *client) int count; count = of_get_child_count(np); - if (!count || count > 4) + if (!count || count > chip->n_leds) return ERR_PTR(-ENODEV); pca9633_leds = devm_kzalloc(&client->dev, - sizeof(struct led_info) * count, GFP_KERNEL); + sizeof(struct led_info) * chip->n_leds, GFP_KERNEL); if (!pca9633_leds) return ERR_PTR(-ENOMEM); @@ -269,12 +302,14 @@ pca9633_dt_init(struct i2c_client *client) } static const struct of_device_id of_pca9633_match[] = { - { .compatible = "nxp,pca963x", }, + { .compatible = "nxp,pca9632", }, + { .compatible = "nxp,pca9633", }, + { .compatible = "nxp,pca9634", }, {}, }; #else static struct pca9633_platform_data * -pca9633_dt_init(struct i2c_client *client) +pca9633_dt_init(struct i2c_client *client, struct pca9633_chipdef *chip) { return ERR_PTR(-ENODEV); } @@ -285,34 +320,38 @@ static int pca9633_probe(struct i2c_client *client, { struct pca9633_led *pca9633; struct pca9633_platform_data *pdata; + struct pca9633_chipdef *chip; int i, err; + chip = &pca9633_chipdefs[id->driver_data]; pdata = dev_get_platdata(&client->dev); if (!pdata) { - pdata = pca9633_dt_init(client); + pdata = pca9633_dt_init(client, chip); if (IS_ERR(pdata)) { dev_warn(&client->dev, "could not parse configuration\n"); pdata = NULL; } } - if (pdata) { - if (pdata->leds.num_leds <= 0 || pdata->leds.num_leds > 4) { - dev_err(&client->dev, "board info must claim at most 4 LEDs"); - return -EINVAL; - } + if (pdata && (pdata->leds.num_leds < 1 || + pdata->leds.num_leds > chip->n_leds)) { + dev_err(&client->dev, "board info must claim 1-%d LEDs", + chip->n_leds); + return -EINVAL; } - pca9633 = devm_kzalloc(&client->dev, 4 * sizeof(*pca9633), GFP_KERNEL); + pca9633 = devm_kzalloc(&client->dev, chip->n_leds * sizeof(*pca9633), + GFP_KERNEL); if (!pca9633) return -ENOMEM; i2c_set_clientdata(client, pca9633); - for (i = 0; i < 4; i++) { + for (i = 0; i < chip->n_leds; i++) { pca9633[i].client = client; pca9633[i].led_num = i; + pca9633[i].chipdef = chip; /* Platform data can specify LED names and default triggers */ if (pdata && i < pdata->leds.num_leds) { @@ -349,7 +388,9 @@ static int pca9633_probe(struct i2c_client *client, i2c_smbus_write_byte_data(client, PCA9633_MODE2, 0x01); /* Turn off LEDs */ - i2c_smbus_write_byte_data(client, PCA9633_LEDOUT, 0x00); + 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); return 0; @@ -367,10 +408,11 @@ static int pca9633_remove(struct i2c_client *client) struct pca9633_led *pca9633 = i2c_get_clientdata(client); int i; - for (i = 0; i < 4; i++) { - led_classdev_unregister(&pca9633[i].led_cdev); - cancel_work_sync(&pca9633[i].work); - } + for (i = 0; i < pca9633->chipdef->n_leds; i++) + if (pca9633[i].client != NULL) { + led_classdev_unregister(&pca9633[i].led_cdev); + cancel_work_sync(&pca9633[i].work); + } return 0; } |