@@ -532,6 +532,16 @@ config LEDS_BD2802
This option enables support for BD2802GU RGB LED driver chips
accessed via the I2C bus.
+config LEDS_BD71828
+ tristate "LED driver for LEDS on ROHM BD71828 PMIC"
+ depends on LEDS_CLASS
+ depends on MFD_ROHM_BD71828
+ help
+ This option enables support for LED outputs located on ROHM
+ BD71828 power management IC. ROHM BD71828 has two led output pins
+ which can be left to indicate HW states or controlled by SW. Say
+ yes here if you want to enable SW control for these LEDs.
+
config LEDS_INTEL_SS4200
tristate "LED driver for Intel NAS SS4200 series"
depends on LEDS_CLASS
@@ -15,6 +15,7 @@ obj-$(CONFIG_LEDS_AN30259A) += leds-an30259a.o
obj-$(CONFIG_LEDS_BCM6328) += leds-bcm6328.o
obj-$(CONFIG_LEDS_BCM6358) += leds-bcm6358.o
obj-$(CONFIG_LEDS_BD2802) += leds-bd2802.o
+obj-$(CONFIG_LEDS_BD71828) += leds-bd71828.o
obj-$(CONFIG_LEDS_CPCAP) += leds-cpcap.o
obj-$(CONFIG_LEDS_LOCOMO) += leds-locomo.o
obj-$(CONFIG_LEDS_LM3530) += leds-lm3530.o
new file mode 100644
@@ -0,0 +1,104 @@
+// SPDX-License-Identifier: GPL-2.0-only
+// Copyright (C) 2019 ROHM Semiconductors
+
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/kernel.h>
+#include <linux/leds.h>
+#include <linux/mfd/rohm-bd71828.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+
+#define BD71828_LED_TO_DATA(l) ((l)->id == ID_GREEN_LED ? \
+ container_of((l), struct bd71828_leds, green) : \
+ container_of((l), struct bd71828_leds, amber))
+
+/* Names for led identification - these match the data sheet names */
+enum {
+ ID_GREEN_LED,
+ ID_AMBER_LED,
+ ID_NMBR_OF,
+};
+
+struct bd71828_led {
+ struct led_init_data init_data;
+ int id;
+ struct led_classdev l;
+ u8 force_mask;
+};
+
+struct bd71828_leds {
+ struct rohm_regmap_dev *bd71828;
+ struct bd71828_led green;
+ struct bd71828_led amber;
+};
+
+static int bd71828_led_brightness_set(struct led_classdev *led_cdev,
+ enum led_brightness value)
+{
+ struct bd71828_led *l = container_of(led_cdev, struct bd71828_led, l);
+ struct bd71828_leds *data;
+ unsigned int val = BD71828_LED_OFF;
+
+ data = BD71828_LED_TO_DATA(l);
+ if (value != LED_OFF)
+ val = BD71828_LED_ON;
+
+ return regmap_update_bits(data->bd71828->regmap, BD71828_REG_LED_CTRL,
+ l->force_mask, val);
+}
+
+static int bd71828_led_probe(struct platform_device *pdev)
+{
+ struct rohm_regmap_dev *bd71828;
+ struct bd71828_leds *l;
+ struct bd71828_led *g, *a;
+ int ret;
+
+ bd71828 = dev_get_drvdata(pdev->dev.parent);
+ l = devm_kzalloc(&pdev->dev, sizeof(*l), GFP_KERNEL);
+ if (!l)
+ return -ENOMEM;
+ l->bd71828 = bd71828;
+ a = &l->amber;
+ g = &l->green;
+
+ /* Fill in details for 'AMBLED' */
+ a->init_data.match_property.name = "rohm,led-compatible";
+ a->init_data.match_property.raw_val = "bd71828-ambled";
+ a->init_data.match_property.size = strlen("bd71828-ambled");
+ a->id = ID_AMBER_LED;
+ a->force_mask = BD71828_MASK_LED_AMBER;
+
+ /* Fill in details for 'GRNLED' */
+ g->init_data.match_property.name = "rohm,led-compatible";
+ g->init_data.match_property.raw_val = "bd71828-grnled";
+ g->init_data.match_property.size = strlen("bd71828-grnled");
+ g->id = ID_GREEN_LED;
+ g->force_mask = BD71828_MASK_LED_GREEN;
+
+ a->l.brightness_set_blocking = bd71828_led_brightness_set;
+ g->l.brightness_set_blocking = bd71828_led_brightness_set;
+
+ ret = devm_led_classdev_register_ext(&pdev->dev, &g->l, &g->init_data);
+ if (ret)
+ return ret;
+
+ return devm_led_classdev_register_ext(&pdev->dev, &a->l, &a->init_data);
+}
+
+static struct platform_driver bd71828_led_driver = {
+ .driver = {
+ .name = "bd71828-led",
+ },
+ .probe = bd71828_led_probe,
+};
+
+module_platform_driver(bd71828_led_driver);
+
+MODULE_AUTHOR("Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>");
+MODULE_DESCRIPTION("ROHM BD71828 LED driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:bd71828-led");
ROHM BD71828 power management IC has two LED outputs for charge status and button pressing indications. The LED outputs can also be forced by SW so add driver allowing to use these LEDs for other indications as well. Leds are controlled by SW using 'Force ON' bits. Please note the constrains mentioned in data-sheet: 1. If one LED is forced ON - then also the other LED is forced. => You can't use SW control to force ON one LED and allow HW to control the other. 2. You can't force both LEDs OFF. If the FORCE bit for both LED's is zero, then LEDs are controlled by HW and indicate button/charger states as explained in data-sheet. Signed-off-by: Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com> --- No changes from v4 drivers/leds/Kconfig | 10 ++++ drivers/leds/Makefile | 1 + drivers/leds/leds-bd71828.c | 104 ++++++++++++++++++++++++++++++++++++ 3 files changed, 115 insertions(+) create mode 100644 drivers/leds/leds-bd71828.c