* [PATCH V1 1/2] leds: leds-qti-rgb: Add LED driver for QTI TRI_LED module
[not found] <20170531061541.10808-1-fenglinw@codeaurora.org>
@ 2017-05-31 6:14 ` fenglinw
[not found] ` <20170531061541.10808-2-fenglinw-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
0 siblings, 1 reply; 6+ messages in thread
From: fenglinw @ 2017-05-31 6:14 UTC (permalink / raw)
To: linux-arm-msm, linux-kernel, Richard Purdie, Jacek Anaszewski,
Pavel Machek, Rob Herring, Mark Rutland, linux-leds, devicetree
Cc: subbaram, aghayal, wruan, kgunda, Fenglin Wu
From: Fenglin Wu <fenglinw@codeaurora.org>
QTI TRI_LED module has 3 current sinks for LED driver and each is
controlled by a PWM channel used for LED dimming or blinking. Add
the driver to support it.
Signed-off-by: Fenglin Wu <fenglinw@codeaurora.org>
---
.../devicetree/bindings/leds/leds-qti-rgb.txt | 66 +++
drivers/leds/Kconfig | 8 +
drivers/leds/Makefile | 1 +
drivers/leds/leds-qti-rgb.c | 634 +++++++++++++++++++++
4 files changed, 709 insertions(+)
create mode 100644 Documentation/devicetree/bindings/leds/leds-qti-rgb.txt
create mode 100644 drivers/leds/leds-qti-rgb.c
diff --git a/Documentation/devicetree/bindings/leds/leds-qti-rgb.txt b/Documentation/devicetree/bindings/leds/leds-qti-rgb.txt
new file mode 100644
index 0000000..62daf38
--- /dev/null
+++ b/Documentation/devicetree/bindings/leds/leds-qti-rgb.txt
@@ -0,0 +1,66 @@
+Qualcomm Technologies, Inc. TRI_LED driver specific bindings
+
+This binding document describes the properties of TRI_LED module in
+Qualcomm Technologies, Inc. PMIC chips.
+
+- compatible:
+ Usage: required
+ Value type: <string>
+ Definition: Must be "qcom,leds-rgb".
+
+- reg:
+ Usage: required
+ Value type: <prop-encoded-array>
+ Definition: Register base of the TRI_LED module and length.
+
+- pwm-names:
+ Usage: required
+ Value type: <stringlist>
+ Definition: A list of string to label the PWM devices defined in pwms
+ property which are using for controlling LEDs.
+ It must be: "blue", "green", "red".
+
+- pwms:
+ Usage: required
+ Value type: <prop-encoded-array>
+ Definition: A list of the PWM devices (phandles) used for controlling
+ LEDs.
+
+- qcom,support-blink:
+ Usage: optional
+ Value type: <prop-encoded-array>
+ Definition: An array of integer values to indicate if "blue", "green", "red"
+ LEDs support blink control. The values are listed as the fixed
+ order for "blue", "green", "red" LEDs.
+
+- qcom,on-ms:
+ Usage: optional
+ Value type: <prop-encoded-array>
+ Definition: An array of time values (milli-seconds) to represent the
+ on duration for "blue", "green", "red" LEDs. The values are
+ listed as the fixed order for "blue", "green", "red" LEDs.
+ This property has to be defined if "qcom,support-blink" is
+ present.
+
+- qcom,off-ms:
+ Usage: optional
+ Value type: <prop-encoded-array>
+ Definition: An array of time values (milli-seconds) to represent the
+ off duration for "blue", "green", "red" LEDs. The values are
+ listed as the fixed order for "blue", "green", "red" LEDs.
+ This property has to be defined if "qcom,support-blink" is
+ present.
+
+Example:
+
+ pmi8998_rgb: rgb@d000{
+ compatible = "qcom,leds-rgb";
+ reg = <0xd000 0x100>;
+ pwm-names = "blue", "green", "red";
+ pwms = <&pmi8998_pwm_3 0 1000000>,
+ <&pmi8998_pwm_4 0 1000000>,
+ <&pmi8998_pwm_5 0 1000000>;
+ qcom,support-blink = <1 1 1>;
+ qcom,on-ms = <500 500 500>;
+ qcom,off-ms = <500 500 500>;
+ };
diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig
index 6c29998..8996bde 100644
--- a/drivers/leds/Kconfig
+++ b/drivers/leds/Kconfig
@@ -667,6 +667,14 @@ config LEDS_PM8058
Choose this option if you want to use the LED drivers in
the Qualcomm PM8058 PMIC.
+config LEDS_QTI_RGB
+ tristate "Qualcomm Technologies, Inc. TRI_LED driver"
+ depends on LEDS_CLASS && MFD_SPMI_PMIC && PWM && OF
+ help
+ This driver supports the TRI_LED module found in Qualcomm
+ Technologies, Inc. PMIC's chips. TRI_LED supports 3 LED drivers and
+ each is controlled by a PWM channel used for dimming or blinking.
+
config LEDS_MLXCPLD
tristate "LED support for the Mellanox boards"
depends on X86_64 && DMI
diff --git a/drivers/leds/Makefile b/drivers/leds/Makefile
index 45f1339..d1a967c 100644
--- a/drivers/leds/Makefile
+++ b/drivers/leds/Makefile
@@ -24,6 +24,7 @@ obj-$(CONFIG_LEDS_COBALT_QUBE) += leds-cobalt-qube.o
obj-$(CONFIG_LEDS_COBALT_RAQ) += leds-cobalt-raq.o
obj-$(CONFIG_LEDS_SUNFIRE) += leds-sunfire.o
obj-$(CONFIG_LEDS_PCA9532) += leds-pca9532.o
+obj-$(CONFIG_LEDS_QTI_RGB) += leds-qti-rgb.o
obj-$(CONFIG_LEDS_GPIO_REGISTER) += leds-gpio-register.o
obj-$(CONFIG_LEDS_GPIO) += leds-gpio.o
obj-$(CONFIG_LEDS_LP3944) += leds-lp3944.o
diff --git a/drivers/leds/leds-qti-rgb.c b/drivers/leds/leds-qti-rgb.c
new file mode 100644
index 0000000..0e363d4
--- /dev/null
+++ b/drivers/leds/leds-qti-rgb.c
@@ -0,0 +1,634 @@
+/* Copyright (c) 2017, The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only 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.
+ */
+
+#define pr_fmt(fmt) "%s: " fmt, __func__
+
+#include <linux/bitops.h>
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/leds.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/platform_device.h>
+#include <linux/pwm.h>
+#include <linux/regmap.h>
+#include <linux/types.h>
+#include <linux/workqueue.h>
+
+#define REG_LED_SRC_SEL 0x45
+#define REG_LED_EN_CTL 0x46
+#define REG_LED_ATC_EN_CTL 0x47
+
+/* REG_LED_SRC_SEL */
+#define LED_SRC_SEL_MASK GENMASK(1, 0)
+#define LED_SRC_GND 0x00
+#define LED_SRC_VINRGB_VBOOST 0x01
+#define LED_SRC_VSYS 0x03
+
+/* REG_LED_EN_CTL */
+#define LED_EN_CTL_MASK GENMASK(7, 5)
+#define LED_EN_CTL_OFFSET 5
+
+/* REG_LED_ATC_EN_CTL */
+#define LED_ATC_EN_MASK GENMASK(7, 5)
+
+#define NUM_LEDS 3
+const char * const led_names[NUM_LEDS] = {"blue", "green", "red"};
+
+struct pwm_setting {
+ u32 initial_period_ns;
+ u32 period_ns;
+ u32 duty_ns;
+};
+
+struct led_setting {
+ u32 brightness;
+ u32 on_ms;
+ u32 off_ms;
+ bool blink;
+};
+
+struct qti_rgb_led_dev {
+ struct led_classdev cdev;
+ struct pwm_device *pwm_dev;
+ struct pwm_setting pwm_setting;
+ struct led_setting led_setting;
+ struct qti_rgb_chip *chip;
+ struct work_struct work;
+ struct mutex lock;
+ bool support_blink;
+ bool blinking;
+ u8 idx;
+};
+
+struct qti_rgb_chip {
+ struct device *dev;
+ struct regmap *regmap;
+ struct qti_rgb_led_dev leds[NUM_LEDS];
+ struct mutex bus_lock;
+ u16 reg_base;
+};
+
+static int qti_rgb_masked_write(struct qti_rgb_chip *chip,
+ u16 addr, u8 mask, u8 val)
+{
+ int rc;
+
+ mutex_lock(&chip->bus_lock);
+ rc = regmap_update_bits(chip->regmap, chip->reg_base + addr, mask, val);
+ if (rc < 0)
+ dev_err(chip->dev, "Update addr 0x%x to val 0x%x with mask 0x%x failed, rc=%d\n",
+ addr, val, mask, rc);
+ mutex_unlock(&chip->bus_lock);
+
+ return rc;
+}
+
+static int __rgb_led_config_pwm(struct qti_rgb_led_dev *led,
+ struct pwm_setting *pwm)
+{
+ int rc;
+
+ if (pwm->duty_ns == 0) {
+ pwm_disable(led->pwm_dev);
+ return 0;
+ }
+
+ rc = pwm_config(led->pwm_dev, pwm->duty_ns, pwm->period_ns);
+ if (rc < 0) {
+ dev_err(led->chip->dev, "Config PWM settings for %s led failed, rc=%d\n",
+ led->cdev.name, rc);
+ return rc;
+ }
+
+ rc = pwm_enable(led->pwm_dev);
+ if (rc < 0)
+ dev_err(led->chip->dev, "Enable PWM for %s led failed, rc=%d\n",
+ led->cdev.name, rc);
+
+ return rc;
+}
+
+static int __rgb_led_set(struct qti_rgb_led_dev *led)
+{
+ int rc = 0;
+ u8 val = 0, mask = 0;
+
+ rc = __rgb_led_config_pwm(led, &led->pwm_setting);
+ if (rc < 0) {
+ dev_err(led->chip->dev, "Configure PWM for %s led failed, rc=%d\n",
+ led->cdev.name, rc);
+ return rc;
+ }
+
+ mask |= 1 << (led->idx + LED_EN_CTL_OFFSET);
+
+ if (led->pwm_setting.duty_ns == 0)
+ val = 0;
+ else
+ val = mask;
+
+ rc = qti_rgb_masked_write(led->chip, REG_LED_EN_CTL, mask, val);
+ if (rc < 0)
+ dev_err(led->chip->dev, "Update addr 0x%x failed, rc=%d\n",
+ REG_LED_EN_CTL, rc);
+
+ return rc;
+}
+
+static void rgb_led_set_work(struct work_struct *work)
+{
+ struct qti_rgb_led_dev *led = container_of(work,
+ struct qti_rgb_led_dev, work);
+ u32 brightness = 0, on_ms, off_ms, period_ns, duty_ns;
+ int rc = 0;
+
+ mutex_lock(&led->lock);
+ if (led->led_setting.blink) {
+ on_ms = led->led_setting.on_ms;
+ off_ms = led->led_setting.off_ms;
+
+ if (on_ms > INT_MAX / NSEC_PER_MSEC)
+ duty_ns = INT_MAX - 1;
+ else
+ duty_ns = on_ms * NSEC_PER_MSEC;
+
+ if (on_ms + off_ms > INT_MAX / NSEC_PER_MSEC) {
+ period_ns = INT_MAX;
+ duty_ns = (period_ns / (on_ms + off_ms)) * on_ms;
+ } else {
+ period_ns = (on_ms + off_ms) * NSEC_PER_MSEC;
+ }
+
+ if (period_ns < duty_ns && duty_ns != 0)
+ period_ns = duty_ns + 1;
+ } else {
+ brightness = led->led_setting.brightness;
+ period_ns = pwm_get_period(led->pwm_dev);
+ /* Use initial period if no blinking is required */
+ if (period_ns > led->pwm_setting.initial_period_ns)
+ period_ns = led->pwm_setting.initial_period_ns;
+
+ if (period_ns > INT_MAX / brightness)
+ duty_ns = (period_ns / LED_FULL) * brightness;
+ else
+ duty_ns = (period_ns * brightness) / LED_FULL;
+
+ if (period_ns < duty_ns && duty_ns != 0)
+ period_ns = duty_ns + 1;
+ }
+ pr_debug("PWM settings for %s led: period = %dns, duty = %dns\n",
+ led->cdev.name, period_ns, duty_ns);
+
+ led->pwm_setting.duty_ns = duty_ns;
+ led->pwm_setting.period_ns = period_ns;
+
+ rc = __rgb_led_set(led);
+ if (rc < 0) {
+ dev_err(led->chip->dev, "rgb_led_set %s failed, rc=%d\n",
+ led->cdev.name, rc);
+ goto unlock;
+ }
+
+ if (led->led_setting.blink) {
+ led->cdev.brightness = LED_FULL;
+ led->blinking = true;
+ } else {
+ led->cdev.brightness = brightness;
+ led->blinking = false;
+ }
+
+unlock:
+ mutex_unlock(&led->lock);
+}
+
+static void qti_rgb_led_set(struct led_classdev *led_cdev,
+ enum led_brightness brightness)
+{
+ struct qti_rgb_led_dev *led =
+ container_of(led_cdev, struct qti_rgb_led_dev, cdev);
+
+ mutex_lock(&led->lock);
+ if (brightness > LED_FULL)
+ brightness = LED_FULL;
+
+ if (brightness == led->led_setting.brightness &&
+ !led->blinking) {
+ mutex_unlock(&led->lock);
+ return;
+ }
+ led->led_setting.blink = false;
+ led->led_setting.brightness = brightness;
+ mutex_unlock(&led->lock);
+
+ schedule_work(&led->work);
+}
+
+static enum led_brightness qti_rgb_led_get(struct led_classdev *led_cdev)
+{
+ return led_cdev->brightness;
+}
+
+static int qti_rgb_led_blink(struct led_classdev *led_cdev,
+ unsigned long *on_ms, unsigned long *off_ms)
+{
+ struct qti_rgb_led_dev *led =
+ container_of(led_cdev, struct qti_rgb_led_dev, cdev);
+
+ if (*on_ms == 0 || *off_ms == 0) {
+ dev_err(led->chip->dev, "Can't set blink for on=%lums off=%lums\n",
+ *on_ms, *off_ms);
+ return -EINVAL;
+ }
+
+ mutex_lock(&led->lock);
+ if (led->blinking && *on_ms == led->led_setting.on_ms &&
+ *off_ms == led->led_setting.off_ms) {
+ pr_debug("Ignore, on/off setting is not changed: on %lums, off %lums\n",
+ *on_ms, *off_ms);
+ mutex_unlock(&led->lock);
+ return 0;
+ }
+
+ led->led_setting.blink = true;
+ led->led_setting.on_ms = (u32)*on_ms;
+ led->led_setting.off_ms = (u32)*off_ms;
+ mutex_unlock(&led->lock);
+
+ schedule_work(&led->work);
+
+ return 0;
+}
+
+static ssize_t blink_store(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ int rc;
+ u32 blink;
+ struct led_classdev *led_cdev = dev_get_drvdata(dev);
+ struct qti_rgb_led_dev *led =
+ container_of(led_cdev, struct qti_rgb_led_dev, cdev);
+
+ rc = kstrtouint(buf, 0, &blink);
+ if (rc)
+ return rc;
+
+ if (!!blink)
+ qti_rgb_led_blink(led_cdev,
+ (unsigned long *)&led->led_setting.on_ms,
+ (unsigned long *)&led->led_setting.off_ms);
+ else
+ qti_rgb_led_set(led_cdev, LED_OFF);
+
+ return count;
+}
+
+static ssize_t blink_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct led_classdev *led_cdev = dev_get_drvdata(dev);
+ struct qti_rgb_led_dev *led =
+ container_of(led_cdev, struct qti_rgb_led_dev, cdev);
+ bool blink;
+
+ blink = led->led_setting.blink &&
+ led->cdev.brightness == LED_FULL;
+
+ return snprintf(buf, PAGE_SIZE, "%d\n", blink);
+}
+
+static ssize_t on_off_ms_store(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t count)
+{
+ struct led_classdev *led_cdev = dev_get_drvdata(dev);
+ int rc, buff_size;
+ char buff[32];
+ char *token, *buff_ptr;
+ bool blink;
+ u32 on_ms, off_ms, brightness;
+
+ buff_size = min(count, sizeof(buff) - 1);
+ memcpy(buff, buf, buff_size);
+ buff[buff_size] = '\0';
+ buff_ptr = buff;
+
+ token = strsep(&buff_ptr, " ");
+ if (!token)
+ return -EINVAL;
+
+ rc = kstrtouint(token, 0, &on_ms);
+ if (rc < 0)
+ return rc;
+
+ token = strsep(&buff_ptr, " ");
+ if (!token)
+ return -EINVAL;
+
+ rc = kstrtouint(token, 0, &off_ms);
+ if (rc < 0)
+ return rc;
+
+ blink = !(on_ms == 0 || off_ms == 0);
+ if (on_ms == 0)
+ brightness = LED_OFF;
+ else if (off_ms == 0)
+ brightness = LED_FULL;
+
+ if (blink)
+ qti_rgb_led_blink(led_cdev, (unsigned long *)&on_ms,
+ (unsigned long *)&off_ms);
+ else
+ qti_rgb_led_set(led_cdev, brightness);
+
+ return count;
+}
+
+static ssize_t on_off_ms_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct led_classdev *led_cdev = dev_get_drvdata(dev);
+ struct qti_rgb_led_dev *led =
+ container_of(led_cdev, struct qti_rgb_led_dev, cdev);
+
+ return snprintf(buf, PAGE_SIZE, "on: %dms, off: %dms\n",
+ led->led_setting.on_ms, led->led_setting.off_ms);
+}
+
+static DEVICE_ATTR(blink, 0644, blink_show, blink_store);
+static DEVICE_ATTR(on_off_ms, 0644, on_off_ms_show, on_off_ms_store);
+
+static struct attribute *blink_attrs[] = {
+ &dev_attr_blink.attr,
+ &dev_attr_on_off_ms.attr,
+ NULL
+};
+
+static const struct attribute_group blink_attrs_group = {
+ .attrs = blink_attrs,
+};
+
+static int qti_rgb_leds_register(struct qti_rgb_chip *chip)
+{
+ int rc, i, j;
+
+ for (i = 0; i < NUM_LEDS; i++) {
+ INIT_WORK(&chip->leds[i].work, rgb_led_set_work);
+ mutex_init(&chip->leds[i].lock);
+ chip->leds[i].cdev.name = led_names[i];
+ chip->leds[i].cdev.max_brightness = LED_FULL;
+ chip->leds[i].cdev.brightness = LED_OFF;
+ chip->leds[i].cdev.brightness_set = qti_rgb_led_set;
+ chip->leds[i].cdev.brightness_get = qti_rgb_led_get;
+ if (chip->leds[i].support_blink)
+ chip->leds[i].cdev.blink_set = qti_rgb_led_blink;
+
+ rc = devm_led_classdev_register(chip->dev, &chip->leds[i].cdev);
+ if (rc < 0) {
+ dev_err(chip->dev, "%s led class device registering failed, rc=%d\n",
+ led_names[i], rc);
+ goto destroy;
+ }
+
+ if (chip->leds[i].support_blink) {
+ rc = sysfs_create_group(&chip->leds[i].cdev.dev->kobj,
+ &blink_attrs_group);
+ if (rc < 0) {
+ dev_err(chip->dev, "Create blink_attrs for %s led failed, rc=%d\n",
+ led_names[i], rc);
+ goto destroy;
+ }
+ }
+ }
+
+ return 0;
+destroy:
+ for (j = 0; j < i; j++) {
+ mutex_destroy(&chip->leds[i].lock);
+ sysfs_remove_group(&chip->leds[i].cdev.dev->kobj,
+ &blink_attrs_group);
+ }
+
+ return rc;
+}
+
+static int qti_rgb_leds_init_pwm_settings(struct qti_rgb_chip *chip)
+{
+ u32 period_ns, duty_ns;
+ bool is_enabled;
+ int i;
+
+ for (i = 0; i < NUM_LEDS; i++) {
+ period_ns = pwm_get_period(chip->leds[i].pwm_dev);
+ duty_ns = pwm_get_duty_cycle(chip->leds[i].pwm_dev);
+ is_enabled = pwm_is_enabled(chip->leds[i].pwm_dev);
+
+ pr_debug("%s led PWM default setting: period = %dns, duty = %dns, is_enabled = %d\n",
+ led_names[i], period_ns, duty_ns, is_enabled);
+ chip->leds[i].pwm_setting.initial_period_ns = period_ns;
+ if (duty_ns > period_ns) {
+ duty_ns = period_ns - 1;
+ pwm_set_duty_cycle(chip->leds[i].pwm_dev, duty_ns);
+ }
+
+ if (is_enabled)
+ pwm_disable(chip->leds[i].pwm_dev);
+ }
+
+ return 0;
+}
+
+static int qti_rgb_leds_hw_init(struct qti_rgb_chip *chip)
+{
+ int rc = 0;
+
+ /* Disable ATC_EN for LEDs */
+ rc = qti_rgb_masked_write(chip, REG_LED_ATC_EN_CTL,
+ LED_ATC_EN_MASK, 0);
+ if (rc < 0) {
+ dev_err(chip->dev, "Writing ATC_EN_CTL failed, rc=%d\n", rc);
+ return rc;
+ }
+
+ /* Select VINRGB_VBOOST as the source */
+ rc = qti_rgb_masked_write(chip, REG_LED_SRC_SEL, LED_SRC_SEL_MASK,
+ LED_SRC_VINRGB_VBOOST);
+ if (rc < 0) {
+ dev_err(chip->dev, "Writing SRC_SEL failed, rc=%d\n", rc);
+ return rc;
+ }
+
+ return rc;
+}
+
+static int qti_rgb_leds_parse_dt(struct qti_rgb_chip *chip)
+{
+ int rc, i, count;
+ const __be32 *addr;
+ u32 support_blink[NUM_LEDS], on_ms[NUM_LEDS], off_ms[NUM_LEDS];
+
+ addr = of_get_address(chip->dev->of_node, 0, NULL, NULL);
+ if (!addr) {
+ dev_err(chip->dev, "Getting address failed\n");
+ return -EINVAL;
+ }
+ chip->reg_base = be32_to_cpu(addr[0]);
+
+ for (i = 0; i < NUM_LEDS; i++) {
+ chip->leds[i].pwm_dev = devm_pwm_get(chip->dev, led_names[i]);
+ if (IS_ERR(chip->leds[i].pwm_dev)) {
+ rc = PTR_ERR(chip->leds[i].pwm_dev);
+ if (rc != -EPROBE_DEFER)
+ dev_err(chip->dev, "Get pwm device for %s led failed, rc=%d\n",
+ led_names[i], rc);
+ return rc;
+ }
+ chip->leds[i].chip = chip;
+ chip->leds[i].idx = i;
+ }
+
+ count = of_property_count_elems_of_size(chip->dev->of_node,
+ "qcom,support-blink", sizeof(u32));
+ if (count > 0) {
+ if (count != NUM_LEDS) {
+ dev_err(chip->dev, "qcom,support-blink property expects %d elements, but it has %d\n",
+ NUM_LEDS, count);
+ return -EINVAL;
+ }
+ rc = of_property_read_u32_array(chip->dev->of_node,
+ "qcom,support-blink", support_blink, count);
+ if (rc < 0) {
+ dev_err(chip->dev, "qcom,support-blink property reading failed, rc=%d\n",
+ rc);
+ return rc;
+ }
+ rc = of_property_read_u32_array(chip->dev->of_node,
+ "qcom,on-ms", on_ms, count);
+ if (rc < 0) {
+ dev_err(chip->dev, "qcom,on-ms property reading failed, rc=%d\n",
+ rc);
+ return rc;
+ }
+ rc = of_property_read_u32_array(chip->dev->of_node,
+ "qcom,off-ms", off_ms, count);
+ if (rc < 0) {
+ dev_err(chip->dev, "qcom,off-ms property reading failed, rc=%d\n",
+ rc);
+ return rc;
+ }
+
+ for (i = 0; i < NUM_LEDS; i++) {
+ chip->leds[i].support_blink = !!support_blink[i];
+ chip->leds[i].led_setting.on_ms = on_ms[i];
+ chip->leds[i].led_setting.off_ms = off_ms[i];
+ if (chip->leds[i].support_blink)
+ pr_debug("%s led supports blink, on_ms=%d, off_ms=%d!\n",
+ led_names[i], on_ms[i], off_ms[i]);
+ else
+ pr_debug("%s led doesn't support blink\n",
+ led_names[i]);
+ }
+ }
+
+ return rc;
+}
+
+static int qti_rgb_leds_probe(struct platform_device *pdev)
+{
+ struct qti_rgb_chip *chip;
+ int rc = 0;
+
+ chip = devm_kzalloc(&pdev->dev, sizeof(*chip), GFP_KERNEL);
+ if (!chip)
+ return -ENOMEM;
+
+ chip->dev = &pdev->dev;
+ chip->regmap = dev_get_regmap(chip->dev->parent, NULL);
+ if (!chip->regmap) {
+ dev_err(chip->dev, "Getting regmap failed\n");
+ return -EINVAL;
+ }
+
+ rc = qti_rgb_leds_parse_dt(chip);
+ if (rc < 0) {
+ dev_err(chip->dev, "Devicetree properties parsing failed, rc=%d\n",
+ rc);
+ return rc;
+ }
+
+ rc = qti_rgb_leds_init_pwm_settings(chip);
+ if (rc < 0) {
+ dev_err(chip->dev, "Init PWM setting failed, rc=%d\n", rc);
+ return rc;
+ }
+
+ mutex_init(&chip->bus_lock);
+
+ rc = qti_rgb_leds_hw_init(chip);
+ if (rc) {
+ dev_err(chip->dev, "HW initialization failed, rc=%d\n", rc);
+ goto destroy;
+ }
+
+ dev_set_drvdata(chip->dev, chip);
+ rc = qti_rgb_leds_register(chip);
+ if (rc < 0) {
+ dev_err(chip->dev, "Registering LED class devices failed, rc=%d\n",
+ rc);
+ goto destroy;
+ }
+
+ return 0;
+destroy:
+ mutex_destroy(&chip->bus_lock);
+ dev_set_drvdata(chip->dev, NULL);
+
+ return rc;
+}
+
+static int qti_rgb_leds_remove(struct platform_device *pdev)
+{
+ int i;
+ struct qti_rgb_chip *chip = dev_get_drvdata(&pdev->dev);
+
+ mutex_destroy(&chip->bus_lock);
+ for (i = 0; i < NUM_LEDS; i++) {
+ if (chip->leds[i].support_blink)
+ sysfs_remove_group(&chip->leds[i].cdev.dev->kobj,
+ &blink_attrs_group);
+ mutex_destroy(&chip->leds[i].lock);
+ }
+ dev_set_drvdata(chip->dev, NULL);
+ return 0;
+}
+
+static const struct of_device_id qti_rgb_of_match[] = {
+ { .compatible = "qcom,leds-rgb",},
+ { },
+};
+
+static struct platform_driver qti_rgb_leds_driver = {
+ .driver = {
+ .name = "qcom,leds-rgb",
+ .of_match_table = qti_rgb_of_match,
+ },
+ .probe = qti_rgb_leds_probe,
+ .remove = qti_rgb_leds_remove,
+};
+module_platform_driver(qti_rgb_leds_driver);
+
+MODULE_DESCRIPTION("QTI TRI_LED (RGB) driver");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("leds:leds-qti-rgb");
--
Qualcomm Technologies, Inc. is a member of the
Code Aurora Forum, a Linux Foundation Collaborative Project.
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