+++ /dev/null
-LEDs connected to pca9632, pca9633 or pca9634
-
-Required properties:
-- compatible : should be : "nxp,pca9632", "nxp,pca9633" or "nxp,pca9634"
-
-Optional properties:
-- nxp,totem-pole : use totem pole (push-pull) instead of default open-drain
-- nxp,hw-blink : use hardware blinking instead of software blinking
-
-Each led is represented as a sub-node of the nxp,pca963x device.
-
-LED sub-node properties:
-- label : (optional) see Documentation/devicetree/bindings/leds/common.txt
-- reg : number of LED line (could be from 0 to 3 in pca9632 or pca9633
- or 0 to 7 in pca9634)
-- linux,default-trigger : (optional)
- see Documentation/devicetree/bindings/leds/common.txt
-
-Examples:
-
-pca9632: pca9632 {
- compatible = "nxp,pca9632";
- #address-cells = <1>;
- #size-cells = <0>;
- reg = <0x62>;
-
- red@0 {
- label = "red";
- reg = <0>;
- linux,default-trigger = "none";
- };
- green@1 {
- label = "green";
- reg = <1>;
- linux,default-trigger = "none";
- };
- blue@2 {
- label = "blue";
- reg = <2>;
- linux,default-trigger = "none";
- };
- unused@3 {
- label = "unused";
- reg = <3>;
- linux,default-trigger = "none";
- };
-};
--- /dev/null
+LEDs connected to pca9632, pca9633 or pca9634
+
+Required properties:
+- compatible : should be : "nxp,pca9632", "nxp,pca9633" or "nxp,pca9634"
+
+Optional properties:
+- nxp,totem-pole : use totem pole (push-pull) instead of default open-drain
+- nxp,hw-blink : use hardware blinking instead of software blinking
+
+Each led is represented as a sub-node of the nxp,pca963x device.
+
+LED sub-node properties:
+- label : (optional) see Documentation/devicetree/bindings/leds/common.txt
+- reg : number of LED line (could be from 0 to 3 in pca9632 or pca9633
+ or 0 to 7 in pca9634)
+- linux,default-trigger : (optional)
+ see Documentation/devicetree/bindings/leds/common.txt
+
+Examples:
+
+pca9632: pca9632 {
+ compatible = "nxp,pca9632";
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <0x62>;
+
+ red@0 {
+ label = "red";
+ reg = <0>;
+ linux,default-trigger = "none";
+ };
+ green@1 {
+ label = "green";
+ reg = <1>;
+ linux,default-trigger = "none";
+ };
+ blue@2 {
+ label = "blue";
+ reg = <2>;
+ linux,default-trigger = "none";
+ };
+ unused@3 {
+ label = "unused";
+ reg = <3>;
+ linux,default-trigger = "none";
+ };
+};
LED driver chips accessed via the I2C bus. Supported
devices include PCA9550, PCA9551, PCA9552, and PCA9553.
-config LEDS_PCA9633
+config LEDS_PCA963X
tristate "LED support for PCA963x I2C chip"
depends on LEDS_CLASS
depends on I2C
obj-$(CONFIG_LEDS_OT200) += leds-ot200.o
obj-$(CONFIG_LEDS_FSG) += leds-fsg.o
obj-$(CONFIG_LEDS_PCA955X) += leds-pca955x.o
-obj-$(CONFIG_LEDS_PCA9633) += leds-pca9633.o
+obj-$(CONFIG_LEDS_PCA963X) += leds-pca963x.o
obj-$(CONFIG_LEDS_DA903X) += leds-da903x.o
obj-$(CONFIG_LEDS_DA9052) += leds-da9052.o
obj-$(CONFIG_LEDS_WM831X_STATUS) += leds-wm831x-status.o
+++ /dev/null
-/*
- * 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
- *
- * This file is subject to the terms and conditions of version 2 of
- * the GNU General Public License. See the file COPYING in the main
- * 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
- * same delay_on/delay_off rates. That is, only the LEDs that are set to
- * blink will actually blink but all LEDs that are set to blink will blink
- * in identical fashion. The delay_on/delay_off values of the last LED
- * that is set to blink will be used for all of the blinking LEDs.
- * Hardware blinking is disabled by default but can be enabled by setting
- * the 'blink_type' member in the platform_data struct to 'PCA9633_HW_BLINK'
- * or by adding the 'nxp,hw-blink' property to the DTS.
- */
-
-#include <linux/module.h>
-#include <linux/delay.h>
-#include <linux/string.h>
-#include <linux/ctype.h>
-#include <linux/leds.h>
-#include <linux/err.h>
-#include <linux/i2c.h>
-#include <linux/workqueue.h>
-#include <linux/slab.h>
-#include <linux/of.h>
-#include <linux/platform_data/leds-pca9633.h>
-
-/* LED select registers determine the source that drives LED outputs */
-#define PCA9633_LED_OFF 0x0 /* LED driver off */
-#define PCA9633_LED_ON 0x1 /* LED driver on */
-#define PCA9633_LED_PWM 0x2 /* Controlled through PWM */
-#define PCA9633_LED_GRP_PWM 0x3 /* Controlled through PWM/GRPPWM */
-
-#define PCA9633_MODE2_DMBLNK 0x20 /* Enable blinking */
-
-#define PCA9633_MODE1 0x00
-#define PCA9633_MODE2 0x01
-#define PCA9633_PWM_BASE 0x02
-
-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[] = {
- { "pca9632", pca9633 },
- { "pca9633", pca9633 },
- { "pca9634", pca9634 },
- { }
-};
-MODULE_DEVICE_TABLE(i2c, pca9633_id);
-
-enum pca9633_cmd {
- BRIGHTNESS_SET,
- BLINK_SET,
-};
-
-struct pca9633_led;
-
-struct pca9633 {
- struct pca9633_chipdef *chipdef;
- struct mutex mutex;
- struct i2c_client *client;
- struct pca9633_led *leds;
-};
-
-struct pca9633_led {
- struct pca9633 *chip;
- struct work_struct work;
- enum led_brightness brightness;
- struct led_classdev led_cdev;
- int led_num; /* 0 .. 7 potentially */
- enum pca9633_cmd cmd;
- char name[32];
- u8 gdc;
- u8 gfrq;
-};
-
-static void pca9633_brightness_work(struct pca9633_led *pca9633)
-{
- u8 ledout_addr = pca9633->chip->chipdef->ledout_base
- + (pca9633->led_num / 4);
- u8 ledout;
- int shift = 2 * (pca9633->led_num % 4);
- u8 mask = 0x3 << shift;
-
- mutex_lock(&pca9633->chip->mutex);
- ledout = i2c_smbus_read_byte_data(pca9633->chip->client, ledout_addr);
- switch (pca9633->brightness) {
- case LED_FULL:
- i2c_smbus_write_byte_data(pca9633->chip->client, ledout_addr,
- (ledout & ~mask) | (PCA9633_LED_ON << shift));
- break;
- case LED_OFF:
- i2c_smbus_write_byte_data(pca9633->chip->client, ledout_addr,
- ledout & ~mask);
- break;
- default:
- i2c_smbus_write_byte_data(pca9633->chip->client,
- PCA9633_PWM_BASE + pca9633->led_num,
- pca9633->brightness);
- i2c_smbus_write_byte_data(pca9633->chip->client, ledout_addr,
- (ledout & ~mask) | (PCA9633_LED_PWM << shift));
- break;
- }
- mutex_unlock(&pca9633->chip->mutex);
-}
-
-static void pca9633_blink_work(struct pca9633_led *pca9633)
-{
- u8 ledout_addr = pca9633->chip->chipdef->ledout_base +
- (pca9633->led_num / 4);
- u8 ledout;
- u8 mode2 = i2c_smbus_read_byte_data(pca9633->chip->client,
- PCA9633_MODE2);
- int shift = 2 * (pca9633->led_num % 4);
- u8 mask = 0x3 << shift;
-
- i2c_smbus_write_byte_data(pca9633->chip->client,
- pca9633->chip->chipdef->grppwm, pca9633->gdc);
-
- i2c_smbus_write_byte_data(pca9633->chip->client,
- pca9633->chip->chipdef->grpfreq, pca9633->gfrq);
-
- if (!(mode2 & PCA9633_MODE2_DMBLNK))
- i2c_smbus_write_byte_data(pca9633->chip->client, PCA9633_MODE2,
- mode2 | PCA9633_MODE2_DMBLNK);
-
- mutex_lock(&pca9633->chip->mutex);
- ledout = i2c_smbus_read_byte_data(pca9633->chip->client, ledout_addr);
- if ((ledout & mask) != (PCA9633_LED_GRP_PWM << shift))
- i2c_smbus_write_byte_data(pca9633->chip->client, ledout_addr,
- (ledout & ~mask) | (PCA9633_LED_GRP_PWM << shift));
- mutex_unlock(&pca9633->chip->mutex);
-}
-
-static void pca9633_work(struct work_struct *work)
-{
- struct pca9633_led *pca9633 = container_of(work,
- struct pca9633_led, work);
-
- switch (pca9633->cmd) {
- case BRIGHTNESS_SET:
- pca9633_brightness_work(pca9633);
- break;
- case BLINK_SET:
- pca9633_blink_work(pca9633);
- break;
- }
-}
-
-static void pca9633_led_set(struct led_classdev *led_cdev,
- enum led_brightness value)
-{
- struct pca9633_led *pca9633;
-
- pca9633 = container_of(led_cdev, struct pca9633_led, led_cdev);
-
- pca9633->cmd = BRIGHTNESS_SET;
- pca9633->brightness = value;
-
- /*
- * Must use workqueue for the actual I/O since I2C operations
- * can sleep.
- */
- schedule_work(&pca9633->work);
-}
-
-static int pca9633_blink_set(struct led_classdev *led_cdev,
- unsigned long *delay_on, unsigned long *delay_off)
-{
- struct pca9633_led *pca9633;
- unsigned long time_on, time_off, period;
- u8 gdc, gfrq;
-
- pca9633 = container_of(led_cdev, struct pca9633_led, led_cdev);
-
- time_on = *delay_on;
- time_off = *delay_off;
-
- /* If both zero, pick reasonable defaults of 500ms each */
- if (!time_on && !time_off) {
- time_on = 500;
- time_off = 500;
- }
-
- period = time_on + time_off;
-
- /* If period not supported by hardware, default to someting sane. */
- if ((period < PCA9632_BLINK_PERIOD_MIN) ||
- (period > PCA9632_BLINK_PERIOD_MAX)) {
- time_on = 500;
- time_off = 500;
- period = time_on + time_off;
- }
-
- /*
- * From manual: duty cycle = (GDC / 256) ->
- * (time_on / period) = (GDC / 256) ->
- * GDC = ((time_on * 256) / period)
- */
- gdc = (time_on * 256) / period;
-
- /*
- * From manual: period = ((GFRQ + 1) / 24) in seconds.
- * So, period (in ms) = (((GFRQ + 1) / 24) * 1000) ->
- * GFRQ = ((period * 24 / 1000) - 1)
- */
- gfrq = (period * 24 / 1000) - 1;
-
- pca9633->cmd = BLINK_SET;
- pca9633->gdc = gdc;
- pca9633->gfrq = gfrq;
-
- /*
- * Must use workqueue for the actual I/O since I2C operations
- * can sleep.
- */
- schedule_work(&pca9633->work);
-
- *delay_on = time_on;
- *delay_off = time_off;
-
- return 0;
-}
-
-#if IS_ENABLED(CONFIG_OF)
-static struct pca9633_platform_data *
-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;
- struct led_info *pca9633_leds;
- int count;
-
- count = of_get_child_count(np);
- if (!count || count > chip->n_leds)
- return ERR_PTR(-ENODEV);
-
- pca9633_leds = devm_kzalloc(&client->dev,
- sizeof(struct led_info) * chip->n_leds, GFP_KERNEL);
- if (!pca9633_leds)
- return ERR_PTR(-ENOMEM);
-
- for_each_child_of_node(np, child) {
- struct led_info led;
- u32 reg;
- int res;
-
- led.name =
- of_get_property(child, "label", NULL) ? : child->name;
- led.default_trigger =
- of_get_property(child, "linux,default-trigger", NULL);
- res = of_property_read_u32(child, "reg", ®);
- if (res != 0)
- continue;
- pca9633_leds[reg] = led;
- }
- pdata = devm_kzalloc(&client->dev,
- sizeof(struct pca9633_platform_data), GFP_KERNEL);
- if (!pdata)
- return ERR_PTR(-ENOMEM);
-
- pdata->leds.leds = pca9633_leds;
- pdata->leds.num_leds = count;
-
- /* default to open-drain unless totem pole (push-pull) is specified */
- if (of_property_read_bool(np, "nxp,totem-pole"))
- pdata->outdrv = PCA9633_TOTEM_POLE;
- else
- pdata->outdrv = PCA9633_OPEN_DRAIN;
-
- /* default to software blinking unless hardware blinking is specified */
- if (of_property_read_bool(np, "nxp,hw-blink"))
- pdata->blink_type = PCA9633_HW_BLINK;
- else
- pdata->blink_type = PCA9633_SW_BLINK;
-
- return pdata;
-}
-
-static const struct of_device_id of_pca9633_match[] = {
- { .compatible = "nxp,pca9632", },
- { .compatible = "nxp,pca9633", },
- { .compatible = "nxp,pca9634", },
- {},
-};
-#else
-static struct pca9633_platform_data *
-pca9633_dt_init(struct i2c_client *client, struct pca9633_chipdef *chip)
-{
- return ERR_PTR(-ENODEV);
-}
-#endif
-
-static int pca9633_probe(struct i2c_client *client,
- const struct i2c_device_id *id)
-{
- struct pca9633 *pca9633_chip;
- 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, chip);
- if (IS_ERR(pdata)) {
- dev_warn(&client->dev, "could not parse configuration\n");
- pdata = NULL;
- }
- }
-
- 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_chip = devm_kzalloc(&client->dev, sizeof(*pca9633_chip),
- GFP_KERNEL);
- if (!pca9633_chip)
- return -ENOMEM;
- pca9633 = devm_kzalloc(&client->dev, chip->n_leds * sizeof(*pca9633),
- GFP_KERNEL);
- if (!pca9633)
- return -ENOMEM;
-
- i2c_set_clientdata(client, pca9633_chip);
-
- mutex_init(&pca9633_chip->mutex);
- pca9633_chip->chipdef = chip;
- pca9633_chip->client = client;
- pca9633_chip->leds = pca9633;
-
- /* 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; i++) {
- pca9633[i].led_num = i;
- pca9633[i].chip = pca9633_chip;
-
- /* Platform data can specify LED names and default triggers */
- if (pdata && i < pdata->leds.num_leds) {
- if (pdata->leds.leds[i].name)
- snprintf(pca9633[i].name,
- sizeof(pca9633[i].name), "pca9633:%s",
- pdata->leds.leds[i].name);
- if (pdata->leds.leds[i].default_trigger)
- pca9633[i].led_cdev.default_trigger =
- pdata->leds.leds[i].default_trigger;
- }
- if (!pdata || i >= pdata->leds.num_leds ||
- !pdata->leds.leds[i].name)
- snprintf(pca9633[i].name, sizeof(pca9633[i].name),
- "pca9633:%d:%.2x:%d", client->adapter->nr,
- client->addr, i);
-
- pca9633[i].led_cdev.name = pca9633[i].name;
- pca9633[i].led_cdev.brightness_set = pca9633_led_set;
-
- if (pdata && pdata->blink_type == PCA9633_HW_BLINK)
- pca9633[i].led_cdev.blink_set = pca9633_blink_set;
-
- INIT_WORK(&pca9633[i].work, pca9633_work);
-
- err = led_classdev_register(&client->dev, &pca9633[i].led_cdev);
- if (err < 0)
- goto exit;
- }
-
- /* Disable LED all-call address and set normal mode */
- i2c_smbus_write_byte_data(client, PCA9633_MODE1, 0x00);
-
- /* Configure output: open-drain or totem pole (push-pull) */
- if (pdata && pdata->outdrv == PCA9633_OPEN_DRAIN)
- i2c_smbus_write_byte_data(client, PCA9633_MODE2, 0x01);
-
- return 0;
-
-exit:
- while (i--) {
- led_classdev_unregister(&pca9633[i].led_cdev);
- cancel_work_sync(&pca9633[i].work);
- }
-
- return err;
-}
-
-static int pca9633_remove(struct i2c_client *client)
-{
- struct pca9633 *pca9633 = i2c_get_clientdata(client);
- int i;
-
- for (i = 0; i < pca9633->chipdef->n_leds; i++) {
- led_classdev_unregister(&pca9633->leds[i].led_cdev);
- cancel_work_sync(&pca9633->leds[i].work);
- }
-
- return 0;
-}
-
-static struct i2c_driver pca9633_driver = {
- .driver = {
- .name = "leds-pca9633",
- .owner = THIS_MODULE,
- .of_match_table = of_match_ptr(of_pca9633_match),
- },
- .probe = pca9633_probe,
- .remove = pca9633_remove,
- .id_table = pca9633_id,
-};
-
-module_i2c_driver(pca9633_driver);
-
-MODULE_AUTHOR("Peter Meerwald <p.meerwald@bct-electronic.com>");
-MODULE_DESCRIPTION("PCA9633 LED driver");
-MODULE_LICENSE("GPL v2");
--- /dev/null
+/*
+ * 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
+ *
+ * This file is subject to the terms and conditions of version 2 of
+ * the GNU General Public License. See the file COPYING in the main
+ * 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
+ * same delay_on/delay_off rates. That is, only the LEDs that are set to
+ * blink will actually blink but all LEDs that are set to blink will blink
+ * in identical fashion. The delay_on/delay_off values of the last LED
+ * that is set to blink will be used for all of the blinking LEDs.
+ * Hardware blinking is disabled by default but can be enabled by setting
+ * the 'blink_type' member in the platform_data struct to 'PCA963X_HW_BLINK'
+ * or by adding the 'nxp,hw-blink' property to the DTS.
+ */
+
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/string.h>
+#include <linux/ctype.h>
+#include <linux/leds.h>
+#include <linux/err.h>
+#include <linux/i2c.h>
+#include <linux/workqueue.h>
+#include <linux/slab.h>
+#include <linux/of.h>
+#include <linux/platform_data/leds-pca963x.h>
+
+/* LED select registers determine the source that drives LED outputs */
+#define PCA963X_LED_OFF 0x0 /* LED driver off */
+#define PCA963X_LED_ON 0x1 /* LED driver on */
+#define PCA963X_LED_PWM 0x2 /* Controlled through PWM */
+#define PCA963X_LED_GRP_PWM 0x3 /* Controlled through PWM/GRPPWM */
+
+#define PCA963X_MODE2_DMBLNK 0x20 /* Enable blinking */
+
+#define PCA963X_MODE1 0x00
+#define PCA963X_MODE2 0x01
+#define PCA963X_PWM_BASE 0x02
+
+enum pca963x_type {
+ pca9633,
+ pca9634,
+};
+
+struct pca963x_chipdef {
+ u8 grppwm;
+ u8 grpfreq;
+ u8 ledout_base;
+ int n_leds;
+};
+
+static struct pca963x_chipdef pca963x_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 PCA963X_BLINK_PERIOD_MIN 42
+#define PCA963X_BLINK_PERIOD_MAX 10667
+
+static const struct i2c_device_id pca963x_id[] = {
+ { "pca9632", pca9633 },
+ { "pca9633", pca9633 },
+ { "pca9634", pca9634 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, pca963x_id);
+
+enum pca963x_cmd {
+ BRIGHTNESS_SET,
+ BLINK_SET,
+};
+
+struct pca963x_led;
+
+struct pca963x {
+ struct pca963x_chipdef *chipdef;
+ struct mutex mutex;
+ struct i2c_client *client;
+ struct pca963x_led *leds;
+};
+
+struct pca963x_led {
+ struct pca963x *chip;
+ struct work_struct work;
+ enum led_brightness brightness;
+ struct led_classdev led_cdev;
+ int led_num; /* 0 .. 7 potentially */
+ enum pca963x_cmd cmd;
+ char name[32];
+ u8 gdc;
+ u8 gfrq;
+};
+
+static void pca963x_brightness_work(struct pca963x_led *pca963x)
+{
+ u8 ledout_addr = pca963x->chip->chipdef->ledout_base
+ + (pca963x->led_num / 4);
+ u8 ledout;
+ int shift = 2 * (pca963x->led_num % 4);
+ u8 mask = 0x3 << shift;
+
+ mutex_lock(&pca963x->chip->mutex);
+ ledout = i2c_smbus_read_byte_data(pca963x->chip->client, ledout_addr);
+ switch (pca963x->brightness) {
+ case LED_FULL:
+ i2c_smbus_write_byte_data(pca963x->chip->client, ledout_addr,
+ (ledout & ~mask) | (PCA963X_LED_ON << shift));
+ break;
+ case LED_OFF:
+ i2c_smbus_write_byte_data(pca963x->chip->client, ledout_addr,
+ ledout & ~mask);
+ break;
+ default:
+ i2c_smbus_write_byte_data(pca963x->chip->client,
+ PCA963X_PWM_BASE + pca963x->led_num,
+ pca963x->brightness);
+ i2c_smbus_write_byte_data(pca963x->chip->client, ledout_addr,
+ (ledout & ~mask) | (PCA963X_LED_PWM << shift));
+ break;
+ }
+ mutex_unlock(&pca963x->chip->mutex);
+}
+
+static void pca963x_blink_work(struct pca963x_led *pca963x)
+{
+ u8 ledout_addr = pca963x->chip->chipdef->ledout_base +
+ (pca963x->led_num / 4);
+ u8 ledout;
+ u8 mode2 = i2c_smbus_read_byte_data(pca963x->chip->client,
+ PCA963X_MODE2);
+ int shift = 2 * (pca963x->led_num % 4);
+ u8 mask = 0x3 << shift;
+
+ i2c_smbus_write_byte_data(pca963x->chip->client,
+ pca963x->chip->chipdef->grppwm, pca963x->gdc);
+
+ i2c_smbus_write_byte_data(pca963x->chip->client,
+ pca963x->chip->chipdef->grpfreq, pca963x->gfrq);
+
+ if (!(mode2 & PCA963X_MODE2_DMBLNK))
+ i2c_smbus_write_byte_data(pca963x->chip->client, PCA963X_MODE2,
+ mode2 | PCA963X_MODE2_DMBLNK);
+
+ mutex_lock(&pca963x->chip->mutex);
+ ledout = i2c_smbus_read_byte_data(pca963x->chip->client, ledout_addr);
+ if ((ledout & mask) != (PCA963X_LED_GRP_PWM << shift))
+ i2c_smbus_write_byte_data(pca963x->chip->client, ledout_addr,
+ (ledout & ~mask) | (PCA963X_LED_GRP_PWM << shift));
+ mutex_unlock(&pca963x->chip->mutex);
+}
+
+static void pca963x_work(struct work_struct *work)
+{
+ struct pca963x_led *pca963x = container_of(work,
+ struct pca963x_led, work);
+
+ switch (pca963x->cmd) {
+ case BRIGHTNESS_SET:
+ pca963x_brightness_work(pca963x);
+ break;
+ case BLINK_SET:
+ pca963x_blink_work(pca963x);
+ break;
+ }
+}
+
+static void pca963x_led_set(struct led_classdev *led_cdev,
+ enum led_brightness value)
+{
+ struct pca963x_led *pca963x;
+
+ pca963x = container_of(led_cdev, struct pca963x_led, led_cdev);
+
+ pca963x->cmd = BRIGHTNESS_SET;
+ pca963x->brightness = value;
+
+ /*
+ * Must use workqueue for the actual I/O since I2C operations
+ * can sleep.
+ */
+ schedule_work(&pca963x->work);
+}
+
+static int pca963x_blink_set(struct led_classdev *led_cdev,
+ unsigned long *delay_on, unsigned long *delay_off)
+{
+ struct pca963x_led *pca963x;
+ unsigned long time_on, time_off, period;
+ u8 gdc, gfrq;
+
+ pca963x = container_of(led_cdev, struct pca963x_led, led_cdev);
+
+ time_on = *delay_on;
+ time_off = *delay_off;
+
+ /* If both zero, pick reasonable defaults of 500ms each */
+ if (!time_on && !time_off) {
+ time_on = 500;
+ time_off = 500;
+ }
+
+ period = time_on + time_off;
+
+ /* If period not supported by hardware, default to someting sane. */
+ if ((period < PCA963X_BLINK_PERIOD_MIN) ||
+ (period > PCA963X_BLINK_PERIOD_MAX)) {
+ time_on = 500;
+ time_off = 500;
+ period = time_on + time_off;
+ }
+
+ /*
+ * From manual: duty cycle = (GDC / 256) ->
+ * (time_on / period) = (GDC / 256) ->
+ * GDC = ((time_on * 256) / period)
+ */
+ gdc = (time_on * 256) / period;
+
+ /*
+ * From manual: period = ((GFRQ + 1) / 24) in seconds.
+ * So, period (in ms) = (((GFRQ + 1) / 24) * 1000) ->
+ * GFRQ = ((period * 24 / 1000) - 1)
+ */
+ gfrq = (period * 24 / 1000) - 1;
+
+ pca963x->cmd = BLINK_SET;
+ pca963x->gdc = gdc;
+ pca963x->gfrq = gfrq;
+
+ /*
+ * Must use workqueue for the actual I/O since I2C operations
+ * can sleep.
+ */
+ schedule_work(&pca963x->work);
+
+ *delay_on = time_on;
+ *delay_off = time_off;
+
+ return 0;
+}
+
+#if IS_ENABLED(CONFIG_OF)
+static struct pca963x_platform_data *
+pca963x_dt_init(struct i2c_client *client, struct pca963x_chipdef *chip)
+{
+ struct device_node *np = client->dev.of_node, *child;
+ struct pca963x_platform_data *pdata;
+ struct led_info *pca963x_leds;
+ int count;
+
+ count = of_get_child_count(np);
+ if (!count || count > chip->n_leds)
+ return ERR_PTR(-ENODEV);
+
+ pca963x_leds = devm_kzalloc(&client->dev,
+ sizeof(struct led_info) * chip->n_leds, GFP_KERNEL);
+ if (!pca963x_leds)
+ return ERR_PTR(-ENOMEM);
+
+ for_each_child_of_node(np, child) {
+ struct led_info led;
+ u32 reg;
+ int res;
+
+ led.name =
+ of_get_property(child, "label", NULL) ? : child->name;
+ led.default_trigger =
+ of_get_property(child, "linux,default-trigger", NULL);
+ res = of_property_read_u32(child, "reg", ®);
+ if (res != 0)
+ continue;
+ pca963x_leds[reg] = led;
+ }
+ pdata = devm_kzalloc(&client->dev,
+ sizeof(struct pca963x_platform_data), GFP_KERNEL);
+ if (!pdata)
+ return ERR_PTR(-ENOMEM);
+
+ pdata->leds.leds = pca963x_leds;
+ pdata->leds.num_leds = count;
+
+ /* default to open-drain unless totem pole (push-pull) is specified */
+ if (of_property_read_bool(np, "nxp,totem-pole"))
+ pdata->outdrv = PCA963X_TOTEM_POLE;
+ else
+ pdata->outdrv = PCA963X_OPEN_DRAIN;
+
+ /* default to software blinking unless hardware blinking is specified */
+ if (of_property_read_bool(np, "nxp,hw-blink"))
+ pdata->blink_type = PCA963X_HW_BLINK;
+ else
+ pdata->blink_type = PCA963X_SW_BLINK;
+
+ return pdata;
+}
+
+static const struct of_device_id of_pca963x_match[] = {
+ { .compatible = "nxp,pca9632", },
+ { .compatible = "nxp,pca9633", },
+ { .compatible = "nxp,pca9634", },
+ {},
+};
+#else
+static struct pca963x_platform_data *
+pca963x_dt_init(struct i2c_client *client, struct pca963x_chipdef *chip)
+{
+ return ERR_PTR(-ENODEV);
+}
+#endif
+
+static int pca963x_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct pca963x *pca963x_chip;
+ struct pca963x_led *pca963x;
+ struct pca963x_platform_data *pdata;
+ struct pca963x_chipdef *chip;
+ int i, err;
+
+ chip = &pca963x_chipdefs[id->driver_data];
+ pdata = dev_get_platdata(&client->dev);
+
+ if (!pdata) {
+ pdata = pca963x_dt_init(client, chip);
+ if (IS_ERR(pdata)) {
+ dev_warn(&client->dev, "could not parse configuration\n");
+ pdata = NULL;
+ }
+ }
+
+ 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;
+ }
+
+ pca963x_chip = devm_kzalloc(&client->dev, sizeof(*pca963x_chip),
+ GFP_KERNEL);
+ if (!pca963x_chip)
+ return -ENOMEM;
+ pca963x = devm_kzalloc(&client->dev, chip->n_leds * sizeof(*pca963x),
+ GFP_KERNEL);
+ if (!pca963x)
+ return -ENOMEM;
+
+ i2c_set_clientdata(client, pca963x_chip);
+
+ mutex_init(&pca963x_chip->mutex);
+ pca963x_chip->chipdef = chip;
+ pca963x_chip->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; i++) {
+ pca963x[i].led_num = i;
+ pca963x[i].chip = pca963x_chip;
+
+ /* Platform data can specify LED names and default triggers */
+ if (pdata && i < pdata->leds.num_leds) {
+ if (pdata->leds.leds[i].name)
+ snprintf(pca963x[i].name,
+ sizeof(pca963x[i].name), "pca963x:%s",
+ pdata->leds.leds[i].name);
+ if (pdata->leds.leds[i].default_trigger)
+ pca963x[i].led_cdev.default_trigger =
+ pdata->leds.leds[i].default_trigger;
+ }
+ if (!pdata || i >= pdata->leds.num_leds ||
+ !pdata->leds.leds[i].name)
+ snprintf(pca963x[i].name, sizeof(pca963x[i].name),
+ "pca963x:%d:%.2x:%d", client->adapter->nr,
+ client->addr, i);
+
+ pca963x[i].led_cdev.name = pca963x[i].name;
+ pca963x[i].led_cdev.brightness_set = pca963x_led_set;
+
+ if (pdata && pdata->blink_type == PCA963X_HW_BLINK)
+ pca963x[i].led_cdev.blink_set = pca963x_blink_set;
+
+ INIT_WORK(&pca963x[i].work, pca963x_work);
+
+ err = led_classdev_register(&client->dev, &pca963x[i].led_cdev);
+ if (err < 0)
+ goto exit;
+ }
+
+ /* Disable LED all-call address and set normal mode */
+ i2c_smbus_write_byte_data(client, PCA963X_MODE1, 0x00);
+
+ /* Configure output: open-drain or totem pole (push-pull) */
+ if (pdata && pdata->outdrv == PCA963X_OPEN_DRAIN)
+ i2c_smbus_write_byte_data(client, PCA963X_MODE2, 0x01);
+
+ return 0;
+
+exit:
+ while (i--) {
+ led_classdev_unregister(&pca963x[i].led_cdev);
+ cancel_work_sync(&pca963x[i].work);
+ }
+
+ return err;
+}
+
+static int pca963x_remove(struct i2c_client *client)
+{
+ struct pca963x *pca963x = i2c_get_clientdata(client);
+ int i;
+
+ for (i = 0; i < pca963x->chipdef->n_leds; i++) {
+ led_classdev_unregister(&pca963x->leds[i].led_cdev);
+ cancel_work_sync(&pca963x->leds[i].work);
+ }
+
+ return 0;
+}
+
+static struct i2c_driver pca963x_driver = {
+ .driver = {
+ .name = "leds-pca963x",
+ .owner = THIS_MODULE,
+ .of_match_table = of_match_ptr(of_pca963x_match),
+ },
+ .probe = pca963x_probe,
+ .remove = pca963x_remove,
+ .id_table = pca963x_id,
+};
+
+module_i2c_driver(pca963x_driver);
+
+MODULE_AUTHOR("Peter Meerwald <p.meerwald@bct-electronic.com>");
+MODULE_DESCRIPTION("PCA963X LED driver");
+MODULE_LICENSE("GPL v2");
+++ /dev/null
-/*
- * PCA9633 LED chip driver.
- *
- * Copyright 2012 bct electronic GmbH
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * version 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
- * 02110-1301 USA
- */
-
-#ifndef __LINUX_PCA9633_H
-#define __LINUX_PCA9633_H
-#include <linux/leds.h>
-
-enum pca9633_outdrv {
- PCA9633_OPEN_DRAIN,
- PCA9633_TOTEM_POLE, /* aka push-pull */
-};
-
-enum pca9633_blink_type {
- PCA9633_SW_BLINK,
- PCA9633_HW_BLINK,
-};
-
-struct pca9633_platform_data {
- struct led_platform_data leds;
- enum pca9633_outdrv outdrv;
- enum pca9633_blink_type blink_type;
-};
-
-#endif /* __LINUX_PCA9633_H*/
--- /dev/null
+/*
+ * PCA963X LED chip driver.
+ *
+ * Copyright 2012 bct electronic GmbH
+ * Copyright 2013 Qtechnology A/S
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ */
+
+#ifndef __LINUX_PCA963X_H
+#define __LINUX_PCA963X_H
+#include <linux/leds.h>
+
+enum pca963x_outdrv {
+ PCA963X_OPEN_DRAIN,
+ PCA963X_TOTEM_POLE, /* aka push-pull */
+};
+
+enum pca963x_blink_type {
+ PCA963X_SW_BLINK,
+ PCA963X_HW_BLINK,
+};
+
+struct pca963x_platform_data {
+ struct led_platform_data leds;
+ enum pca963x_outdrv outdrv;
+ enum pca963x_blink_type blink_type;
+};
+
+#endif /* __LINUX_PCA963X_H*/
projects / deliverable / linux.git / commitdiff
