136edc939SThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only
256a1740cSRicardo Ribalda Delgado /*
356a1740cSRicardo Ribalda Delgado * Copyright 2011 bct electronic GmbH
456a1740cSRicardo Ribalda Delgado * Copyright 2013 Qtechnology/AS
556a1740cSRicardo Ribalda Delgado *
656a1740cSRicardo Ribalda Delgado * Author: Peter Meerwald <p.meerwald@bct-electronic.com>
7cea0fad0SRicardo Ribalda Delgado * Author: Ricardo Ribalda <ribalda@kernel.org>
856a1740cSRicardo Ribalda Delgado *
956a1740cSRicardo Ribalda Delgado * Based on leds-pca955x.c
1056a1740cSRicardo Ribalda Delgado *
1156a1740cSRicardo Ribalda Delgado * LED driver for the PCA9633 I2C LED driver (7-bit slave address 0x62)
123dfedb9dSPeter Meerwald * LED driver for the PCA9634/5 I2C LED driver (7-bit slave address set by hw.)
1356a1740cSRicardo Ribalda Delgado *
1456a1740cSRicardo Ribalda Delgado * Note that hardware blinking violates the leds infrastructure driver
1556a1740cSRicardo Ribalda Delgado * interface since the hardware only supports blinking all LEDs with the
1656a1740cSRicardo Ribalda Delgado * same delay_on/delay_off rates. That is, only the LEDs that are set to
1756a1740cSRicardo Ribalda Delgado * blink will actually blink but all LEDs that are set to blink will blink
1856a1740cSRicardo Ribalda Delgado * in identical fashion. The delay_on/delay_off values of the last LED
1956a1740cSRicardo Ribalda Delgado * that is set to blink will be used for all of the blinking LEDs.
2056a1740cSRicardo Ribalda Delgado * Hardware blinking is disabled by default but can be enabled by setting
2156a1740cSRicardo Ribalda Delgado * the 'blink_type' member in the platform_data struct to 'PCA963X_HW_BLINK'
2256a1740cSRicardo Ribalda Delgado * or by adding the 'nxp,hw-blink' property to the DTS.
2356a1740cSRicardo Ribalda Delgado */
2456a1740cSRicardo Ribalda Delgado
2556a1740cSRicardo Ribalda Delgado #include <linux/module.h>
2656a1740cSRicardo Ribalda Delgado #include <linux/delay.h>
2756a1740cSRicardo Ribalda Delgado #include <linux/string.h>
2856a1740cSRicardo Ribalda Delgado #include <linux/ctype.h>
2956a1740cSRicardo Ribalda Delgado #include <linux/leds.h>
3056a1740cSRicardo Ribalda Delgado #include <linux/err.h>
3156a1740cSRicardo Ribalda Delgado #include <linux/i2c.h>
320b6034d8SAndy Shevchenko #include <linux/property.h>
3356a1740cSRicardo Ribalda Delgado #include <linux/slab.h>
3456a1740cSRicardo Ribalda Delgado #include <linux/of.h>
3556a1740cSRicardo Ribalda Delgado
3656a1740cSRicardo Ribalda Delgado /* LED select registers determine the source that drives LED outputs */
3756a1740cSRicardo Ribalda Delgado #define PCA963X_LED_OFF 0x0 /* LED driver off */
3856a1740cSRicardo Ribalda Delgado #define PCA963X_LED_ON 0x1 /* LED driver on */
3956a1740cSRicardo Ribalda Delgado #define PCA963X_LED_PWM 0x2 /* Controlled through PWM */
4056a1740cSRicardo Ribalda Delgado #define PCA963X_LED_GRP_PWM 0x3 /* Controlled through PWM/GRPPWM */
4156a1740cSRicardo Ribalda Delgado
4269752909SZahari Petkov #define PCA963X_MODE2_OUTDRV 0x04 /* Open-drain or totem pole */
4369752909SZahari Petkov #define PCA963X_MODE2_INVRT 0x10 /* Normal or inverted direction */
4456a1740cSRicardo Ribalda Delgado #define PCA963X_MODE2_DMBLNK 0x20 /* Enable blinking */
4556a1740cSRicardo Ribalda Delgado
4656a1740cSRicardo Ribalda Delgado #define PCA963X_MODE1 0x00
4756a1740cSRicardo Ribalda Delgado #define PCA963X_MODE2 0x01
4856a1740cSRicardo Ribalda Delgado #define PCA963X_PWM_BASE 0x02
4956a1740cSRicardo Ribalda Delgado
5056a1740cSRicardo Ribalda Delgado enum pca963x_type {
5156a1740cSRicardo Ribalda Delgado pca9633,
5256a1740cSRicardo Ribalda Delgado pca9634,
533dfedb9dSPeter Meerwald pca9635,
5456a1740cSRicardo Ribalda Delgado };
5556a1740cSRicardo Ribalda Delgado
5656a1740cSRicardo Ribalda Delgado struct pca963x_chipdef {
5756a1740cSRicardo Ribalda Delgado u8 grppwm;
5856a1740cSRicardo Ribalda Delgado u8 grpfreq;
5956a1740cSRicardo Ribalda Delgado u8 ledout_base;
6056a1740cSRicardo Ribalda Delgado int n_leds;
6135c7d301SMatt Ranostay unsigned int scaling;
6256a1740cSRicardo Ribalda Delgado };
6356a1740cSRicardo Ribalda Delgado
6456a1740cSRicardo Ribalda Delgado static struct pca963x_chipdef pca963x_chipdefs[] = {
6556a1740cSRicardo Ribalda Delgado [pca9633] = {
6656a1740cSRicardo Ribalda Delgado .grppwm = 0x6,
6756a1740cSRicardo Ribalda Delgado .grpfreq = 0x7,
6856a1740cSRicardo Ribalda Delgado .ledout_base = 0x8,
6956a1740cSRicardo Ribalda Delgado .n_leds = 4,
7056a1740cSRicardo Ribalda Delgado },
7156a1740cSRicardo Ribalda Delgado [pca9634] = {
7256a1740cSRicardo Ribalda Delgado .grppwm = 0xa,
7356a1740cSRicardo Ribalda Delgado .grpfreq = 0xb,
7456a1740cSRicardo Ribalda Delgado .ledout_base = 0xc,
7556a1740cSRicardo Ribalda Delgado .n_leds = 8,
7656a1740cSRicardo Ribalda Delgado },
773dfedb9dSPeter Meerwald [pca9635] = {
783dfedb9dSPeter Meerwald .grppwm = 0x12,
793dfedb9dSPeter Meerwald .grpfreq = 0x13,
803dfedb9dSPeter Meerwald .ledout_base = 0x14,
813dfedb9dSPeter Meerwald .n_leds = 16,
823dfedb9dSPeter Meerwald },
8356a1740cSRicardo Ribalda Delgado };
8456a1740cSRicardo Ribalda Delgado
8556a1740cSRicardo Ribalda Delgado /* Total blink period in milliseconds */
8656a1740cSRicardo Ribalda Delgado #define PCA963X_BLINK_PERIOD_MIN 42
8756a1740cSRicardo Ribalda Delgado #define PCA963X_BLINK_PERIOD_MAX 10667
8856a1740cSRicardo Ribalda Delgado
8956a1740cSRicardo Ribalda Delgado static const struct i2c_device_id pca963x_id[] = {
9056a1740cSRicardo Ribalda Delgado { "pca9632", pca9633 },
9156a1740cSRicardo Ribalda Delgado { "pca9633", pca9633 },
9256a1740cSRicardo Ribalda Delgado { "pca9634", pca9634 },
933dfedb9dSPeter Meerwald { "pca9635", pca9635 },
9456a1740cSRicardo Ribalda Delgado { }
9556a1740cSRicardo Ribalda Delgado };
9656a1740cSRicardo Ribalda Delgado MODULE_DEVICE_TABLE(i2c, pca963x_id);
9756a1740cSRicardo Ribalda Delgado
98b5a3b44fSMarek Behún struct pca963x;
9956a1740cSRicardo Ribalda Delgado
10056a1740cSRicardo Ribalda Delgado struct pca963x_led {
10156a1740cSRicardo Ribalda Delgado struct pca963x *chip;
10256a1740cSRicardo Ribalda Delgado struct led_classdev led_cdev;
1033dfedb9dSPeter Meerwald int led_num; /* 0 .. 15 potentially */
104fd6dd958SBernardo Rodrigues bool blinking;
10556a1740cSRicardo Ribalda Delgado u8 gdc;
10656a1740cSRicardo Ribalda Delgado u8 gfrq;
10756a1740cSRicardo Ribalda Delgado };
10856a1740cSRicardo Ribalda Delgado
109b5a3b44fSMarek Behún struct pca963x {
110b5a3b44fSMarek Behún struct pca963x_chipdef *chipdef;
111b5a3b44fSMarek Behún struct mutex mutex;
112b5a3b44fSMarek Behún struct i2c_client *client;
113b5a3b44fSMarek Behún unsigned long leds_on;
114b5a3b44fSMarek Behún struct pca963x_led leds[];
115b5a3b44fSMarek Behún };
116b5a3b44fSMarek Behún
pca963x_brightness(struct pca963x_led * led,enum led_brightness brightness)1175db85093SMarek Behún static int pca963x_brightness(struct pca963x_led *led,
1185029a2e3SAndrew Lunn enum led_brightness brightness)
11956a1740cSRicardo Ribalda Delgado {
1205db85093SMarek Behún struct i2c_client *client = led->chip->client;
1215db85093SMarek Behún struct pca963x_chipdef *chipdef = led->chip->chipdef;
12239118499SMarek Behún u8 ledout_addr, ledout, mask, val;
12339118499SMarek Behún int shift;
1245029a2e3SAndrew Lunn int ret;
12556a1740cSRicardo Ribalda Delgado
1265db85093SMarek Behún ledout_addr = chipdef->ledout_base + (led->led_num / 4);
1275db85093SMarek Behún shift = 2 * (led->led_num % 4);
12839118499SMarek Behún mask = 0x3 << shift;
12939118499SMarek Behún ledout = i2c_smbus_read_byte_data(client, ledout_addr);
13039118499SMarek Behún
1315029a2e3SAndrew Lunn switch (brightness) {
13256a1740cSRicardo Ribalda Delgado case LED_FULL:
133fd6dd958SBernardo Rodrigues if (led->blinking) {
134fd6dd958SBernardo Rodrigues val = (ledout & ~mask) | (PCA963X_LED_GRP_PWM << shift);
135fd6dd958SBernardo Rodrigues ret = i2c_smbus_write_byte_data(client,
136fd6dd958SBernardo Rodrigues PCA963X_PWM_BASE +
137fd6dd958SBernardo Rodrigues led->led_num,
138fd6dd958SBernardo Rodrigues LED_FULL);
139fd6dd958SBernardo Rodrigues } else {
14039118499SMarek Behún val = (ledout & ~mask) | (PCA963X_LED_ON << shift);
141fd6dd958SBernardo Rodrigues }
14239118499SMarek Behún ret = i2c_smbus_write_byte_data(client, ledout_addr, val);
14356a1740cSRicardo Ribalda Delgado break;
14456a1740cSRicardo Ribalda Delgado case LED_OFF:
14539118499SMarek Behún val = ledout & ~mask;
14639118499SMarek Behún ret = i2c_smbus_write_byte_data(client, ledout_addr, val);
147fd6dd958SBernardo Rodrigues led->blinking = false;
14856a1740cSRicardo Ribalda Delgado break;
14956a1740cSRicardo Ribalda Delgado default:
15039118499SMarek Behún ret = i2c_smbus_write_byte_data(client,
15139118499SMarek Behún PCA963X_PWM_BASE +
1525db85093SMarek Behún led->led_num,
1535029a2e3SAndrew Lunn brightness);
1545029a2e3SAndrew Lunn if (ret < 0)
155a8c170b0SMatt Ranostay return ret;
15639118499SMarek Behún
157fd6dd958SBernardo Rodrigues if (led->blinking)
158fd6dd958SBernardo Rodrigues val = (ledout & ~mask) | (PCA963X_LED_GRP_PWM << shift);
159fd6dd958SBernardo Rodrigues else
16039118499SMarek Behún val = (ledout & ~mask) | (PCA963X_LED_PWM << shift);
161fd6dd958SBernardo Rodrigues
16239118499SMarek Behún ret = i2c_smbus_write_byte_data(client, ledout_addr, val);
16356a1740cSRicardo Ribalda Delgado break;
16456a1740cSRicardo Ribalda Delgado }
165a8c170b0SMatt Ranostay
1665029a2e3SAndrew Lunn return ret;
16756a1740cSRicardo Ribalda Delgado }
16856a1740cSRicardo Ribalda Delgado
pca963x_blink(struct pca963x_led * led)1695db85093SMarek Behún static void pca963x_blink(struct pca963x_led *led)
17056a1740cSRicardo Ribalda Delgado {
1715db85093SMarek Behún struct i2c_client *client = led->chip->client;
1725db85093SMarek Behún struct pca963x_chipdef *chipdef = led->chip->chipdef;
17339118499SMarek Behún u8 ledout_addr, ledout, mask, val, mode2;
17439118499SMarek Behún int shift;
17556a1740cSRicardo Ribalda Delgado
1765db85093SMarek Behún ledout_addr = chipdef->ledout_base + (led->led_num / 4);
1775db85093SMarek Behún shift = 2 * (led->led_num % 4);
17839118499SMarek Behún mask = 0x3 << shift;
17939118499SMarek Behún mode2 = i2c_smbus_read_byte_data(client, PCA963X_MODE2);
18056a1740cSRicardo Ribalda Delgado
1815db85093SMarek Behún i2c_smbus_write_byte_data(client, chipdef->grppwm, led->gdc);
18239118499SMarek Behún
1835db85093SMarek Behún i2c_smbus_write_byte_data(client, chipdef->grpfreq, led->gfrq);
18456a1740cSRicardo Ribalda Delgado
18556a1740cSRicardo Ribalda Delgado if (!(mode2 & PCA963X_MODE2_DMBLNK))
18639118499SMarek Behún i2c_smbus_write_byte_data(client, PCA963X_MODE2,
18756a1740cSRicardo Ribalda Delgado mode2 | PCA963X_MODE2_DMBLNK);
18856a1740cSRicardo Ribalda Delgado
1895db85093SMarek Behún mutex_lock(&led->chip->mutex);
19039118499SMarek Behún
19139118499SMarek Behún ledout = i2c_smbus_read_byte_data(client, ledout_addr);
19239118499SMarek Behún if ((ledout & mask) != (PCA963X_LED_GRP_PWM << shift)) {
19339118499SMarek Behún val = (ledout & ~mask) | (PCA963X_LED_GRP_PWM << shift);
19439118499SMarek Behún i2c_smbus_write_byte_data(client, ledout_addr, val);
19539118499SMarek Behún }
19639118499SMarek Behún
1975db85093SMarek Behún mutex_unlock(&led->chip->mutex);
198fd6dd958SBernardo Rodrigues led->blinking = true;
19956a1740cSRicardo Ribalda Delgado }
20056a1740cSRicardo Ribalda Delgado
pca963x_power_state(struct pca963x_led * led)2015db85093SMarek Behún static int pca963x_power_state(struct pca963x_led *led)
202a8c170b0SMatt Ranostay {
2035db85093SMarek Behún struct i2c_client *client = led->chip->client;
2045db85093SMarek Behún unsigned long *leds_on = &led->chip->leds_on;
20539118499SMarek Behún unsigned long cached_leds = *leds_on;
206a8c170b0SMatt Ranostay
2075db85093SMarek Behún if (led->led_cdev.brightness)
2085db85093SMarek Behún set_bit(led->led_num, leds_on);
209a8c170b0SMatt Ranostay else
2105db85093SMarek Behún clear_bit(led->led_num, leds_on);
211a8c170b0SMatt Ranostay
212a8c170b0SMatt Ranostay if (!(*leds_on) != !cached_leds)
21339118499SMarek Behún return i2c_smbus_write_byte_data(client, PCA963X_MODE1,
21439118499SMarek Behún *leds_on ? 0 : BIT(4));
215a8c170b0SMatt Ranostay
216a8c170b0SMatt Ranostay return 0;
217a8c170b0SMatt Ranostay }
218a8c170b0SMatt Ranostay
pca963x_led_set(struct led_classdev * led_cdev,enum led_brightness value)2195029a2e3SAndrew Lunn static int pca963x_led_set(struct led_classdev *led_cdev,
22056a1740cSRicardo Ribalda Delgado enum led_brightness value)
22156a1740cSRicardo Ribalda Delgado {
2225db85093SMarek Behún struct pca963x_led *led;
223a8c170b0SMatt Ranostay int ret;
22456a1740cSRicardo Ribalda Delgado
2255db85093SMarek Behún led = container_of(led_cdev, struct pca963x_led, led_cdev);
22656a1740cSRicardo Ribalda Delgado
2275db85093SMarek Behún mutex_lock(&led->chip->mutex);
228a8c170b0SMatt Ranostay
2295db85093SMarek Behún ret = pca963x_brightness(led, value);
230a8c170b0SMatt Ranostay if (ret < 0)
231a8c170b0SMatt Ranostay goto unlock;
2325db85093SMarek Behún ret = pca963x_power_state(led);
233a8c170b0SMatt Ranostay
234a8c170b0SMatt Ranostay unlock:
2355db85093SMarek Behún mutex_unlock(&led->chip->mutex);
236a8c170b0SMatt Ranostay return ret;
23756a1740cSRicardo Ribalda Delgado }
23856a1740cSRicardo Ribalda Delgado
pca963x_period_scale(struct pca963x_led * led,unsigned int val)2395db85093SMarek Behún static unsigned int pca963x_period_scale(struct pca963x_led *led,
24035c7d301SMatt Ranostay unsigned int val)
24135c7d301SMatt Ranostay {
2425db85093SMarek Behún unsigned int scaling = led->chip->chipdef->scaling;
24335c7d301SMatt Ranostay
24435c7d301SMatt Ranostay return scaling ? DIV_ROUND_CLOSEST(val * scaling, 1000) : val;
24535c7d301SMatt Ranostay }
24635c7d301SMatt Ranostay
pca963x_blink_set(struct led_classdev * led_cdev,unsigned long * delay_on,unsigned long * delay_off)24756a1740cSRicardo Ribalda Delgado static int pca963x_blink_set(struct led_classdev *led_cdev,
24856a1740cSRicardo Ribalda Delgado unsigned long *delay_on, unsigned long *delay_off)
24956a1740cSRicardo Ribalda Delgado {
25056a1740cSRicardo Ribalda Delgado unsigned long time_on, time_off, period;
2515db85093SMarek Behún struct pca963x_led *led;
25256a1740cSRicardo Ribalda Delgado u8 gdc, gfrq;
25356a1740cSRicardo Ribalda Delgado
2545db85093SMarek Behún led = container_of(led_cdev, struct pca963x_led, led_cdev);
25556a1740cSRicardo Ribalda Delgado
25656a1740cSRicardo Ribalda Delgado time_on = *delay_on;
25756a1740cSRicardo Ribalda Delgado time_off = *delay_off;
25856a1740cSRicardo Ribalda Delgado
25956a1740cSRicardo Ribalda Delgado /* If both zero, pick reasonable defaults of 500ms each */
26056a1740cSRicardo Ribalda Delgado if (!time_on && !time_off) {
26156a1740cSRicardo Ribalda Delgado time_on = 500;
26256a1740cSRicardo Ribalda Delgado time_off = 500;
26356a1740cSRicardo Ribalda Delgado }
26456a1740cSRicardo Ribalda Delgado
2655db85093SMarek Behún period = pca963x_period_scale(led, time_on + time_off);
26656a1740cSRicardo Ribalda Delgado
26756a1740cSRicardo Ribalda Delgado /* If period not supported by hardware, default to someting sane. */
26856a1740cSRicardo Ribalda Delgado if ((period < PCA963X_BLINK_PERIOD_MIN) ||
26956a1740cSRicardo Ribalda Delgado (period > PCA963X_BLINK_PERIOD_MAX)) {
27056a1740cSRicardo Ribalda Delgado time_on = 500;
27156a1740cSRicardo Ribalda Delgado time_off = 500;
2725db85093SMarek Behún period = pca963x_period_scale(led, 1000);
27356a1740cSRicardo Ribalda Delgado }
27456a1740cSRicardo Ribalda Delgado
27556a1740cSRicardo Ribalda Delgado /*
27656a1740cSRicardo Ribalda Delgado * From manual: duty cycle = (GDC / 256) ->
27756a1740cSRicardo Ribalda Delgado * (time_on / period) = (GDC / 256) ->
27856a1740cSRicardo Ribalda Delgado * GDC = ((time_on * 256) / period)
27956a1740cSRicardo Ribalda Delgado */
2805db85093SMarek Behún gdc = (pca963x_period_scale(led, time_on) * 256) / period;
28156a1740cSRicardo Ribalda Delgado
28256a1740cSRicardo Ribalda Delgado /*
28356a1740cSRicardo Ribalda Delgado * From manual: period = ((GFRQ + 1) / 24) in seconds.
28456a1740cSRicardo Ribalda Delgado * So, period (in ms) = (((GFRQ + 1) / 24) * 1000) ->
28556a1740cSRicardo Ribalda Delgado * GFRQ = ((period * 24 / 1000) - 1)
28656a1740cSRicardo Ribalda Delgado */
28756a1740cSRicardo Ribalda Delgado gfrq = (period * 24 / 1000) - 1;
28856a1740cSRicardo Ribalda Delgado
2895db85093SMarek Behún led->gdc = gdc;
2905db85093SMarek Behún led->gfrq = gfrq;
29156a1740cSRicardo Ribalda Delgado
2925db85093SMarek Behún pca963x_blink(led);
293fd6dd958SBernardo Rodrigues led->led_cdev.brightness = LED_FULL;
294fd6dd958SBernardo Rodrigues pca963x_led_set(led_cdev, LED_FULL);
29556a1740cSRicardo Ribalda Delgado
29656a1740cSRicardo Ribalda Delgado *delay_on = time_on;
29756a1740cSRicardo Ribalda Delgado *delay_off = time_off;
29856a1740cSRicardo Ribalda Delgado
29956a1740cSRicardo Ribalda Delgado return 0;
30056a1740cSRicardo Ribalda Delgado }
30156a1740cSRicardo Ribalda Delgado
pca963x_register_leds(struct i2c_client * client,struct pca963x * chip)30285fc8efeSMarek Behún static int pca963x_register_leds(struct i2c_client *client,
30385fc8efeSMarek Behún struct pca963x *chip)
30456a1740cSRicardo Ribalda Delgado {
30585fc8efeSMarek Behún struct pca963x_chipdef *chipdef = chip->chipdef;
30685fc8efeSMarek Behún struct pca963x_led *led = chip->leds;
30785fc8efeSMarek Behún struct device *dev = &client->dev;
3080b6034d8SAndy Shevchenko struct fwnode_handle *child;
30985fc8efeSMarek Behún bool hw_blink;
31085fc8efeSMarek Behún s32 mode2;
31156a1740cSRicardo Ribalda Delgado u32 reg;
31285fc8efeSMarek Behún int ret;
31356a1740cSRicardo Ribalda Delgado
31439118499SMarek Behún if (device_property_read_u32(dev, "nxp,period-scale",
315fc0b1ecaSMarek Behún &chipdef->scaling))
316fc0b1ecaSMarek Behún chipdef->scaling = 1000;
31735c7d301SMatt Ranostay
31885fc8efeSMarek Behún hw_blink = device_property_read_bool(dev, "nxp,hw-blink");
31985fc8efeSMarek Behún
32085fc8efeSMarek Behún mode2 = i2c_smbus_read_byte_data(client, PCA963X_MODE2);
32185fc8efeSMarek Behún if (mode2 < 0)
32285fc8efeSMarek Behún return mode2;
32385fc8efeSMarek Behún
32485fc8efeSMarek Behún /* default to open-drain unless totem pole (push-pull) is specified */
32585fc8efeSMarek Behún if (device_property_read_bool(dev, "nxp,totem-pole"))
32685fc8efeSMarek Behún mode2 |= PCA963X_MODE2_OUTDRV;
32785fc8efeSMarek Behún else
32885fc8efeSMarek Behún mode2 &= ~PCA963X_MODE2_OUTDRV;
32985fc8efeSMarek Behún
330bb29b9ccSAnders Darander /* default to non-inverted output, unless inverted is specified */
33139118499SMarek Behún if (device_property_read_bool(dev, "nxp,inverted-out"))
33285fc8efeSMarek Behún mode2 |= PCA963X_MODE2_INVRT;
333bb29b9ccSAnders Darander else
33485fc8efeSMarek Behún mode2 &= ~PCA963X_MODE2_INVRT;
335bb29b9ccSAnders Darander
33685fc8efeSMarek Behún ret = i2c_smbus_write_byte_data(client, PCA963X_MODE2, mode2);
33785fc8efeSMarek Behún if (ret < 0)
33885fc8efeSMarek Behún return ret;
33985fc8efeSMarek Behún
34085fc8efeSMarek Behún device_for_each_child_node(dev, child) {
341564ead12SMarek Behún struct led_init_data init_data = {};
342564ead12SMarek Behún char default_label[32];
343564ead12SMarek Behún
34485fc8efeSMarek Behún ret = fwnode_property_read_u32(child, "reg", ®);
34585fc8efeSMarek Behún if (ret || reg >= chipdef->n_leds) {
34685fc8efeSMarek Behún dev_err(dev, "Invalid 'reg' property for node %pfw\n",
34785fc8efeSMarek Behún child);
34885fc8efeSMarek Behún ret = -EINVAL;
34985fc8efeSMarek Behún goto err;
35085fc8efeSMarek Behún }
35185fc8efeSMarek Behún
35285fc8efeSMarek Behún led->led_num = reg;
35385fc8efeSMarek Behún led->chip = chip;
35485fc8efeSMarek Behún led->led_cdev.brightness_set_blocking = pca963x_led_set;
35585fc8efeSMarek Behún if (hw_blink)
35685fc8efeSMarek Behún led->led_cdev.blink_set = pca963x_blink_set;
357fd6dd958SBernardo Rodrigues led->blinking = false;
35885fc8efeSMarek Behún
359564ead12SMarek Behún init_data.fwnode = child;
360564ead12SMarek Behún /* for backwards compatibility */
361564ead12SMarek Behún init_data.devicename = "pca963x";
362564ead12SMarek Behún snprintf(default_label, sizeof(default_label), "%d:%.2x:%u",
363564ead12SMarek Behún client->adapter->nr, client->addr, reg);
364564ead12SMarek Behún init_data.default_label = default_label;
365564ead12SMarek Behún
366564ead12SMarek Behún ret = devm_led_classdev_register_ext(dev, &led->led_cdev,
367564ead12SMarek Behún &init_data);
36885fc8efeSMarek Behún if (ret) {
36985fc8efeSMarek Behún dev_err(dev, "Failed to register LED for node %pfw\n",
37085fc8efeSMarek Behún child);
37185fc8efeSMarek Behún goto err;
37285fc8efeSMarek Behún }
37385fc8efeSMarek Behún
37485fc8efeSMarek Behún ++led;
37585fc8efeSMarek Behún }
37685fc8efeSMarek Behún
37785fc8efeSMarek Behún return 0;
37885fc8efeSMarek Behún err:
37985fc8efeSMarek Behún fwnode_handle_put(child);
38085fc8efeSMarek Behún return ret;
38156a1740cSRicardo Ribalda Delgado }
38256a1740cSRicardo Ribalda Delgado
38356a1740cSRicardo Ribalda Delgado static const struct of_device_id of_pca963x_match[] = {
38456a1740cSRicardo Ribalda Delgado { .compatible = "nxp,pca9632", },
38556a1740cSRicardo Ribalda Delgado { .compatible = "nxp,pca9633", },
38656a1740cSRicardo Ribalda Delgado { .compatible = "nxp,pca9634", },
3873dfedb9dSPeter Meerwald { .compatible = "nxp,pca9635", },
38856a1740cSRicardo Ribalda Delgado {},
38956a1740cSRicardo Ribalda Delgado };
3904d59ed85SJavier Martinez Canillas MODULE_DEVICE_TABLE(of, of_pca963x_match);
39156a1740cSRicardo Ribalda Delgado
pca963x_probe(struct i2c_client * client)3922c6aaf88SUwe Kleine-König static int pca963x_probe(struct i2c_client *client)
39356a1740cSRicardo Ribalda Delgado {
3942c6aaf88SUwe Kleine-König const struct i2c_device_id *id = i2c_client_get_device_id(client);
39539118499SMarek Behún struct device *dev = &client->dev;
396fc0b1ecaSMarek Behún struct pca963x_chipdef *chipdef;
397fc0b1ecaSMarek Behún struct pca963x *chip;
39885fc8efeSMarek Behún int i, count;
39956a1740cSRicardo Ribalda Delgado
400fc0b1ecaSMarek Behún chipdef = &pca963x_chipdefs[id->driver_data];
40156a1740cSRicardo Ribalda Delgado
40285fc8efeSMarek Behún count = device_get_child_node_count(dev);
40385fc8efeSMarek Behún if (!count || count > chipdef->n_leds) {
40485fc8efeSMarek Behún dev_err(dev, "Node %pfw must define between 1 and %d LEDs\n",
40585fc8efeSMarek Behún dev_fwnode(dev), chipdef->n_leds);
40656a1740cSRicardo Ribalda Delgado return -EINVAL;
40756a1740cSRicardo Ribalda Delgado }
40856a1740cSRicardo Ribalda Delgado
40985fc8efeSMarek Behún chip = devm_kzalloc(dev, struct_size(chip, leds, count), GFP_KERNEL);
410fc0b1ecaSMarek Behún if (!chip)
41156a1740cSRicardo Ribalda Delgado return -ENOMEM;
41256a1740cSRicardo Ribalda Delgado
413fc0b1ecaSMarek Behún i2c_set_clientdata(client, chip);
41456a1740cSRicardo Ribalda Delgado
415fc0b1ecaSMarek Behún mutex_init(&chip->mutex);
416fc0b1ecaSMarek Behún chip->chipdef = chipdef;
417fc0b1ecaSMarek Behún chip->client = client;
41856a1740cSRicardo Ribalda Delgado
41956a1740cSRicardo Ribalda Delgado /* Turn off LEDs by default*/
420fc0b1ecaSMarek Behún for (i = 0; i < chipdef->n_leds / 4; i++)
421fc0b1ecaSMarek Behún i2c_smbus_write_byte_data(client, chipdef->ledout_base + i, 0x00);
42256a1740cSRicardo Ribalda Delgado
423a8c170b0SMatt Ranostay /* Disable LED all-call address, and power down initially */
424a8c170b0SMatt Ranostay i2c_smbus_write_byte_data(client, PCA963X_MODE1, BIT(4));
42556a1740cSRicardo Ribalda Delgado
42685fc8efeSMarek Behún return pca963x_register_leds(client, chip);
42756a1740cSRicardo Ribalda Delgado }
42856a1740cSRicardo Ribalda Delgado
42956a1740cSRicardo Ribalda Delgado static struct i2c_driver pca963x_driver = {
43056a1740cSRicardo Ribalda Delgado .driver = {
43156a1740cSRicardo Ribalda Delgado .name = "leds-pca963x",
4320b6034d8SAndy Shevchenko .of_match_table = of_pca963x_match,
43356a1740cSRicardo Ribalda Delgado },
434*d9ff8a8eSUwe Kleine-König .probe = pca963x_probe,
43556a1740cSRicardo Ribalda Delgado .id_table = pca963x_id,
43656a1740cSRicardo Ribalda Delgado };
43756a1740cSRicardo Ribalda Delgado
43856a1740cSRicardo Ribalda Delgado module_i2c_driver(pca963x_driver);
43956a1740cSRicardo Ribalda Delgado
44056a1740cSRicardo Ribalda Delgado MODULE_AUTHOR("Peter Meerwald <p.meerwald@bct-electronic.com>");
44156a1740cSRicardo Ribalda Delgado MODULE_DESCRIPTION("PCA963X LED driver");
44256a1740cSRicardo Ribalda Delgado MODULE_LICENSE("GPL v2");
443