forked from luck/tmp_suning_uos_patched
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>
This commit is contained in:
Ricardo Ribalda Delgado
Bryan Wu
parent
daa124b1fe
commit
af67384f01
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@ -1,24 +1,25 @@
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LEDs connected to pca9633 or pca9632
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LEDs connected to pca9632, pca9633 or pca9634
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Required properties:
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- compatible : should be : "nxp,pca963x"
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- compatible : should be : "nxp,pca9632", "nxp,pca9633" or "nxp,pca9634"
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Optional properties:
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- nxp,totem-pole : use totem pole (push-pull) instead of default open-drain
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- nxp,hw-blink : use hardware blinking instead of software blinking
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Each led is represented as a sub-node of the nxp,pca9633 device.
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Each led is represented as a sub-node of the nxp,pca963x device.
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LED sub-node properties:
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- label : (optional) see Documentation/devicetree/bindings/leds/common.txt
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- reg : number of LED line (could be from 0 to 4)
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- reg : number of LED line (could be from 0 to 3 in pca9632 or pca9633
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or 0 to 7 in pca9634)
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- linux,default-trigger : (optional)
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see Documentation/devicetree/bindings/leds/common.txt
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Examples:
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pca9632: pca9632 {
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compatible = "nxp,pca9632", "nxp,pca963x";
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compatible = "nxp,pca9632";
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#address-cells = <1>;
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#size-cells = <0>;
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reg = <0x62>;
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@ -292,12 +292,13 @@ config LEDS_PCA955X
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devices include PCA9550, PCA9551, PCA9552, and PCA9553.
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config LEDS_PCA9633
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tristate "LED support for PCA9633 I2C chip"
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tristate "LED support for PCA963x I2C chip"
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depends on LEDS_CLASS
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depends on I2C
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help
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This option enables support for LEDs connected to the PCA9633
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LED driver chip accessed via the I2C bus.
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This option enables support for LEDs connected to the PCA963x
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LED driver chip accessed via the I2C bus. Supported
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devices include PCA9633 and PCA9634
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config LEDS_WM831X_STATUS
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tristate "LED support for status LEDs on WM831x PMICs"
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@ -1,7 +1,9 @@
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/*
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* Copyright 2011 bct electronic GmbH
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* Copyright 2013 Qtechnology/AS
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*
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* Author: Peter Meerwald <p.meerwald@bct-electronic.com>
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* Author: Ricardo Ribalda <ricardo.ribalda@gmail.com>
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*
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* Based on leds-pca955x.c
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*
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@ -10,6 +12,7 @@
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* directory of this archive for more details.
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*
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* LED driver for the PCA9633 I2C LED driver (7-bit slave address 0x62)
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* LED driver for the PCA9634 I2C LED driver (7-bit slave address set by hw.)
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*
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* Note that hardware blinking violates the leds infrastructure driver
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* interface since the hardware only supports blinking all LEDs with the
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@ -45,16 +48,42 @@
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#define PCA9633_MODE1 0x00
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#define PCA9633_MODE2 0x01
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#define PCA9633_PWM_BASE 0x02
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#define PCA9633_GRPPWM 0x06
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#define PCA9633_GRPFREQ 0x07
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#define PCA9633_LEDOUT 0x08
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enum pca9633_type {
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pca9633,
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pca9634,
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};
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struct pca9633_chipdef {
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u8 grppwm;
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u8 grpfreq;
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u8 ledout_base;
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int n_leds;
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};
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static struct pca9633_chipdef pca9633_chipdefs[] = {
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[pca9633] = {
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.grppwm = 0x6,
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.grpfreq = 0x7,
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.ledout_base = 0x8,
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.n_leds = 4,
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},
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[pca9634] = {
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.grppwm = 0xa,
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.grpfreq = 0xb,
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.ledout_base = 0xc,
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.n_leds = 8,
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},
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};
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/* Total blink period in milliseconds */
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#define PCA9632_BLINK_PERIOD_MIN 42
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#define PCA9632_BLINK_PERIOD_MAX 10667
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static const struct i2c_device_id pca9633_id[] = {
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{ "pca9633", 0 },
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{ "pca9632", pca9633 },
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{ "pca9633", pca9633 },
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{ "pca9634", pca9634 },
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, pca9633_id);
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@ -66,10 +95,11 @@ enum pca9633_cmd {
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struct pca9633_led {
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struct i2c_client *client;
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struct pca9633_chipdef *chipdef;
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struct work_struct work;
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enum led_brightness brightness;
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struct led_classdev led_cdev;
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int led_num; /* 0 .. 3 potentially */
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int led_num; /* 0 .. 7 potentially */
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enum pca9633_cmd cmd;
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char name[32];
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u8 gdc;
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@ -78,24 +108,26 @@ struct pca9633_led {
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static void pca9633_brightness_work(struct pca9633_led *pca9633)
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{
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u8 ledout = i2c_smbus_read_byte_data(pca9633->client, PCA9633_LEDOUT);
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int shift = 2 * pca9633->led_num;
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u8 ledout_addr = pca9633->chipdef->ledout_base + (pca9633->led_num / 4);
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u8 ledout;
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int shift = 2 * (pca9633->led_num % 4);
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u8 mask = 0x3 << shift;
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ledout = i2c_smbus_read_byte_data(pca9633->client, ledout_addr);
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switch (pca9633->brightness) {
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case LED_FULL:
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i2c_smbus_write_byte_data(pca9633->client, PCA9633_LEDOUT,
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i2c_smbus_write_byte_data(pca9633->client, ledout_addr,
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(ledout & ~mask) | (PCA9633_LED_ON << shift));
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break;
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case LED_OFF:
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i2c_smbus_write_byte_data(pca9633->client, PCA9633_LEDOUT,
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i2c_smbus_write_byte_data(pca9633->client, ledout_addr,
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ledout & ~mask);
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break;
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default:
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i2c_smbus_write_byte_data(pca9633->client,
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PCA9633_PWM_BASE + pca9633->led_num,
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pca9633->brightness);
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i2c_smbus_write_byte_data(pca9633->client, PCA9633_LEDOUT,
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i2c_smbus_write_byte_data(pca9633->client, ledout_addr,
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(ledout & ~mask) | (PCA9633_LED_PWM << shift));
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break;
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}
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@ -103,15 +135,16 @@ static void pca9633_brightness_work(struct pca9633_led *pca9633)
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static void pca9633_blink_work(struct pca9633_led *pca9633)
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{
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u8 ledout = i2c_smbus_read_byte_data(pca9633->client, PCA9633_LEDOUT);
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u8 ledout_addr = pca9633->chipdef->ledout_base + (pca9633->led_num / 4);
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u8 ledout = i2c_smbus_read_byte_data(pca9633->client, ledout_addr);
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u8 mode2 = i2c_smbus_read_byte_data(pca9633->client, PCA9633_MODE2);
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int shift = 2 * pca9633->led_num;
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int shift = 2 * (pca9633->led_num % 4);
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u8 mask = 0x3 << shift;
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i2c_smbus_write_byte_data(pca9633->client, PCA9633_GRPPWM,
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i2c_smbus_write_byte_data(pca9633->client, pca9633->chipdef->grppwm,
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pca9633->gdc);
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i2c_smbus_write_byte_data(pca9633->client, PCA9633_GRPFREQ,
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i2c_smbus_write_byte_data(pca9633->client, pca9633->chipdef->grpfreq,
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pca9633->gfrq);
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if (!(mode2 & PCA9633_MODE2_DMBLNK))
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@ -119,7 +152,7 @@ static void pca9633_blink_work(struct pca9633_led *pca9633)
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mode2 | PCA9633_MODE2_DMBLNK);
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if ((ledout & mask) != (PCA9633_LED_GRP_PWM << shift))
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i2c_smbus_write_byte_data(pca9633->client, PCA9633_LEDOUT,
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i2c_smbus_write_byte_data(pca9633->client, ledout_addr,
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(ledout & ~mask) | (PCA9633_LED_GRP_PWM << shift));
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}
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@ -215,7 +248,7 @@ static int pca9633_blink_set(struct led_classdev *led_cdev,
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#if IS_ENABLED(CONFIG_OF)
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static struct pca9633_platform_data *
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pca9633_dt_init(struct i2c_client *client)
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pca9633_dt_init(struct i2c_client *client, struct pca9633_chipdef *chip)
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{
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struct device_node *np = client->dev.of_node, *child;
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struct pca9633_platform_data *pdata;
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@ -223,11 +256,11 @@ pca9633_dt_init(struct i2c_client *client)
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int count;
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count = of_get_child_count(np);
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if (!count || count > 4)
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if (!count || count > chip->n_leds)
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return ERR_PTR(-ENODEV);
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pca9633_leds = devm_kzalloc(&client->dev,
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sizeof(struct led_info) * count, GFP_KERNEL);
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sizeof(struct led_info) * chip->n_leds, GFP_KERNEL);
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if (!pca9633_leds)
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return ERR_PTR(-ENOMEM);
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@ -269,12 +302,14 @@ pca9633_dt_init(struct i2c_client *client)
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}
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static const struct of_device_id of_pca9633_match[] = {
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{ .compatible = "nxp,pca963x", },
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{ .compatible = "nxp,pca9632", },
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{ .compatible = "nxp,pca9633", },
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{ .compatible = "nxp,pca9634", },
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{},
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};
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#else
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static struct pca9633_platform_data *
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pca9633_dt_init(struct i2c_client *client)
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pca9633_dt_init(struct i2c_client *client, struct pca9633_chipdef *chip)
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{
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return ERR_PTR(-ENODEV);
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}
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@ -285,34 +320,38 @@ static int pca9633_probe(struct i2c_client *client,
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{
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struct pca9633_led *pca9633;
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struct pca9633_platform_data *pdata;
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struct pca9633_chipdef *chip;
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int i, err;
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chip = &pca9633_chipdefs[id->driver_data];
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pdata = dev_get_platdata(&client->dev);
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if (!pdata) {
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pdata = pca9633_dt_init(client);
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pdata = pca9633_dt_init(client, chip);
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if (IS_ERR(pdata)) {
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dev_warn(&client->dev, "could not parse configuration\n");
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pdata = NULL;
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}
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}
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if (pdata) {
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if (pdata->leds.num_leds <= 0 || pdata->leds.num_leds > 4) {
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dev_err(&client->dev, "board info must claim at most 4 LEDs");
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return -EINVAL;
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}
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if (pdata && (pdata->leds.num_leds < 1 ||
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pdata->leds.num_leds > chip->n_leds)) {
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dev_err(&client->dev, "board info must claim 1-%d LEDs",
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chip->n_leds);
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return -EINVAL;
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}
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pca9633 = devm_kzalloc(&client->dev, 4 * sizeof(*pca9633), GFP_KERNEL);
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pca9633 = devm_kzalloc(&client->dev, chip->n_leds * sizeof(*pca9633),
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GFP_KERNEL);
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if (!pca9633)
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return -ENOMEM;
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i2c_set_clientdata(client, pca9633);
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for (i = 0; i < 4; i++) {
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for (i = 0; i < chip->n_leds; i++) {
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pca9633[i].client = client;
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pca9633[i].led_num = i;
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pca9633[i].chipdef = chip;
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/* Platform data can specify LED names and default triggers */
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if (pdata && i < pdata->leds.num_leds) {
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@ -349,7 +388,9 @@ static int pca9633_probe(struct i2c_client *client,
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i2c_smbus_write_byte_data(client, PCA9633_MODE2, 0x01);
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/* Turn off LEDs */
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i2c_smbus_write_byte_data(client, PCA9633_LEDOUT, 0x00);
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i2c_smbus_write_byte_data(client, chip->ledout_base, 0x00);
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if (chip->n_leds > 4)
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i2c_smbus_write_byte_data(client, chip->ledout_base + 1, 0x00);
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return 0;
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@ -367,10 +408,11 @@ static int pca9633_remove(struct i2c_client *client)
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struct pca9633_led *pca9633 = i2c_get_clientdata(client);
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int i;
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for (i = 0; i < 4; i++) {
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led_classdev_unregister(&pca9633[i].led_cdev);
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cancel_work_sync(&pca9633[i].work);
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}
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for (i = 0; i < pca9633->chipdef->n_leds; i++)
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if (pca9633[i].client != NULL) {
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led_classdev_unregister(&pca9633[i].led_cdev);
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cancel_work_sync(&pca9633[i].work);
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}
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return 0;
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}
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