diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2019-05-07 18:02:51 -0700 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2019-05-07 18:02:51 -0700 |
commit | 8b35ad6232c462b02e397e87ce702bcddd4ba543 (patch) | |
tree | 921cd619336b1ff7f0dde7bdbf9f898ffe4cedae /drivers | |
parent | f678d6da749983791850876e3421e7c48a0a7127 (diff) | |
parent | 0db37915d912e8dc6588f25da76d3ed36718d92f (diff) |
Merge tag 'leds-for-5.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/j.anaszewski/linux-leds
Pull LED updates from Jacek Anaszewski:
"LED core fixes and improvements:
- avoid races with workqueue
- Kconfig: pedantic cleanup
- small fixes for Flash class description
leds-lt3593:
- remove unneeded assignment in lt3593_led_probe
- drop pdata handling code
leds-blinkm:
- clean up double assignment to data->i2c_addr
leds-pca955x, leds-pca963x:
- revert ACPI support, as it turned out that there is no evidence
of officially registered ACPI IDs for these devices.
- make use of device property API
leds-as3645a:
- switch to fwnode property API
LED related addition to ACPI documentation:
- document how to refer to LEDs from remote nodes
LED related fix to ALSA line6/toneport driver:
- avoid polluting led_* namespace
And lm3532 driver relocation from MFD to LED subsystem, accompanied by
various improvements and optimizations; it entails also a change in
omap4-droid4-xt894.dts:
- leds: lm3532: Introduce the lm3532 LED driver
- mfd: ti-lmu: Remove LM3532 backlight driver references
- ARM: dts: omap4-droid4: Update backlight dt properties
- dt: lm3532: Add lm3532 dt doc and update ti_lmu doc"
* tag 'leds-for-5.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/j.anaszewski/linux-leds:
leds: avoid races with workqueue
ALSA: line6: Avoid polluting led_* namespace
leds: lm3532: Introduce the lm3532 LED driver
mfd: ti-lmu: Remove LM3532 backlight driver references
ARM: dts: omap4-droid4: Update backlight dt properties
dt: lm3532: Add lm3532 dt doc and update ti_lmu doc
leds: Small fixes for Flash class description
leds: blinkm: clean up double assignment to data->i2c_addr
leds: pca963x: Make use of device property API
leds: pca955x: Make use of device property API
leds: lt3593: Remove unneeded assignment in lt3593_led_probe
leds: lt3593: drop pdata handling code
leds: pca955x: Revert "Add ACPI support"
leds: pca963x: Revert "Add ACPI support"
drivers: leds: Kconfig: pedantic cleanups
ACPI: Document how to refer to LEDs from remote nodes
leds: as3645a: Switch to fwnode property API
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/leds/Kconfig | 33 | ||||
-rw-r--r-- | drivers/leds/Makefile | 1 | ||||
-rw-r--r-- | drivers/leds/led-class.c | 1 | ||||
-rw-r--r-- | drivers/leds/led-core.c | 5 | ||||
-rw-r--r-- | drivers/leds/leds-as3645a.c | 93 | ||||
-rw-r--r-- | drivers/leds/leds-blinkm.c | 1 | ||||
-rw-r--r-- | drivers/leds/leds-lm3532.c | 683 | ||||
-rw-r--r-- | drivers/leds/leds-lt3593.c | 64 | ||||
-rw-r--r-- | drivers/leds/leds-pca955x.c | 57 | ||||
-rw-r--r-- | drivers/leds/leds-pca963x.c | 66 | ||||
-rw-r--r-- | drivers/mfd/ti-lmu.c | 11 |
11 files changed, 801 insertions, 214 deletions
diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig index a72f97fca57b..f3000ccb8d35 100644 --- a/drivers/leds/Kconfig +++ b/drivers/leds/Kconfig @@ -23,8 +23,8 @@ config LEDS_CLASS_FLASH tristate "LED Flash Class Support" depends on LEDS_CLASS help - This option enables the flash led sysfs class in /sys/class/leds. - It wrapps LED Class and adds flash LEDs specific sysfs attributes + This option enables the flash LED sysfs class in /sys/class/leds. + It wraps LED Class and adds flash LEDs specific sysfs attributes and kernel internal API to it. You'll need this to provide support for the flash related features of a LED device. It can be built as a module. @@ -56,7 +56,7 @@ config LEDS_AAT1290 depends on OF depends on PINCTRL help - This option enables support for the LEDs on the AAT1290. + This option enables support for the LEDs on the AAT1290. config LEDS_AN30259A tristate "LED support for Panasonic AN30259A" @@ -138,6 +138,16 @@ config LEDS_LM3530 controlled manually or using PWM input or using ambient light automatically. +config LEDS_LM3532 + tristate "LCD Backlight driver for LM3532" + depends on LEDS_CLASS + depends on I2C + help + This option enables support for the LCD backlight using + LM3532 ambient light sensor chip. This ALS chip can be + controlled manually or using PWM input or using ambient + light automatically. + config LEDS_LM3533 tristate "LED support for LM3533" depends on LEDS_CLASS @@ -413,13 +423,13 @@ config LEDS_CLEVO_MAIL This module can drive the mail LED for the following notebooks: - Clevo D400P - Clevo D410J - Clevo D410V - Clevo D400V/D470V (not tested, but might work) - Clevo M540N - Clevo M5x0N (not tested, but might work) - Positivo Mobile (Clevo M5x0V) + Clevo D400P + Clevo D410J + Clevo D410V + Clevo D400V/D470V (not tested, but might work) + Clevo M540N + Clevo M5x0N (not tested, but might work) + Positivo Mobile (Clevo M5x0V) If your model is not listed here you can try the "nodetect" module parameter. @@ -462,7 +472,7 @@ config LEDS_WM831X_STATUS depends on MFD_WM831X help This option enables support for the status LEDs of the WM831x - series of PMICs. + series of PMICs. config LEDS_WM8350 tristate "LED Support for WM8350 AudioPlus PMIC" @@ -533,6 +543,7 @@ config LEDS_LT3593 tristate "LED driver for LT3593 controllers" depends on LEDS_CLASS depends on GPIOLIB || COMPILE_TEST + depends on OF help This option enables support for LEDs driven by a Linear Technology LT3593 controller. This controller uses a special one-wire pulse diff --git a/drivers/leds/Makefile b/drivers/leds/Makefile index 4c1b0054f379..7a8b1f55d459 100644 --- a/drivers/leds/Makefile +++ b/drivers/leds/Makefile @@ -18,6 +18,7 @@ obj-$(CONFIG_LEDS_BD2802) += leds-bd2802.o obj-$(CONFIG_LEDS_CPCAP) += leds-cpcap.o obj-$(CONFIG_LEDS_LOCOMO) += leds-locomo.o obj-$(CONFIG_LEDS_LM3530) += leds-lm3530.o +obj-$(CONFIG_LEDS_LM3532) += leds-lm3532.o obj-$(CONFIG_LEDS_LM3533) += leds-lm3533.o obj-$(CONFIG_LEDS_LM3642) += leds-lm3642.o obj-$(CONFIG_LEDS_MIKROTIK_RB532) += leds-rb532.o diff --git a/drivers/leds/led-class.c b/drivers/leds/led-class.c index 3c7e3487b373..85848c5da705 100644 --- a/drivers/leds/led-class.c +++ b/drivers/leds/led-class.c @@ -57,6 +57,7 @@ static ssize_t brightness_store(struct device *dev, if (state == LED_OFF) led_trigger_remove(led_cdev); led_set_brightness(led_cdev, state); + flush_work(&led_cdev->set_brightness_work); ret = size; unlock: diff --git a/drivers/leds/led-core.c b/drivers/leds/led-core.c index e3da7c03da1b..e9ae7f87ab90 100644 --- a/drivers/leds/led-core.c +++ b/drivers/leds/led-core.c @@ -164,6 +164,11 @@ static void led_blink_setup(struct led_classdev *led_cdev, unsigned long *delay_on, unsigned long *delay_off) { + /* + * If "set brightness to 0" is pending in workqueue, we don't + * want that to be reordered after blink_set() + */ + flush_work(&led_cdev->set_brightness_work); if (!test_bit(LED_BLINK_ONESHOT, &led_cdev->work_flags) && led_cdev->blink_set && !led_cdev->blink_set(led_cdev, delay_on, delay_off)) diff --git a/drivers/leds/leds-as3645a.c b/drivers/leds/leds-as3645a.c index 98a69b1a43f9..b0df514992e1 100644 --- a/drivers/leds/leds-as3645a.c +++ b/drivers/leds/leds-as3645a.c @@ -25,7 +25,7 @@ #include <linux/leds.h> #include <linux/module.h> #include <linux/mutex.h> -#include <linux/of.h> +#include <linux/property.h> #include <linux/slab.h> #include <media/v4l2-flash-led-class.h> @@ -148,8 +148,8 @@ struct as3645a { struct v4l2_flash *vf; struct v4l2_flash *vfind; - struct device_node *flash_node; - struct device_node *indicator_node; + struct fwnode_handle *flash_node; + struct fwnode_handle *indicator_node; struct as3645a_config cfg; @@ -493,30 +493,31 @@ static int as3645a_detect(struct as3645a *flash) static int as3645a_parse_node(struct as3645a *flash, struct as3645a_names *names, - struct device_node *node) + struct fwnode_handle *fwnode) { struct as3645a_config *cfg = &flash->cfg; - struct device_node *child; + struct fwnode_handle *child; const char *name; int rval; - for_each_child_of_node(node, child) { + fwnode_for_each_child_node(fwnode, child) { u32 id = 0; - of_property_read_u32(child, "reg", &id); + fwnode_property_read_u32(child, "reg", &id); switch (id) { case AS_LED_FLASH: - flash->flash_node = of_node_get(child); + flash->flash_node = child; break; case AS_LED_INDICATOR: - flash->indicator_node = of_node_get(child); + flash->indicator_node = child; break; default: dev_warn(&flash->client->dev, "unknown LED %u encountered, ignoring\n", id); break; } + fwnode_handle_get(child); } if (!flash->flash_node) { @@ -524,42 +525,46 @@ static int as3645a_parse_node(struct as3645a *flash, return -ENODEV; } - rval = of_property_read_string(flash->flash_node, "label", &name); - if (!rval) + rval = fwnode_property_read_string(flash->flash_node, "label", &name); + if (!rval) { strlcpy(names->flash, name, sizeof(names->flash)); - else + } else if (is_of_node(fwnode)) { snprintf(names->flash, sizeof(names->flash), - "%pOFn:flash", node); + "%pOFn:flash", to_of_node(fwnode)); + } else { + dev_err(&flash->client->dev, "flash node has no label!\n"); + return -EINVAL; + } - rval = of_property_read_u32(flash->flash_node, "flash-timeout-us", - &cfg->flash_timeout_us); + rval = fwnode_property_read_u32(flash->flash_node, "flash-timeout-us", + &cfg->flash_timeout_us); if (rval < 0) { dev_err(&flash->client->dev, "can't read flash-timeout-us property for flash\n"); goto out_err; } - rval = of_property_read_u32(flash->flash_node, "flash-max-microamp", - &cfg->flash_max_ua); + rval = fwnode_property_read_u32(flash->flash_node, "flash-max-microamp", + &cfg->flash_max_ua); if (rval < 0) { dev_err(&flash->client->dev, "can't read flash-max-microamp property for flash\n"); goto out_err; } - rval = of_property_read_u32(flash->flash_node, "led-max-microamp", - &cfg->assist_max_ua); + rval = fwnode_property_read_u32(flash->flash_node, "led-max-microamp", + &cfg->assist_max_ua); if (rval < 0) { dev_err(&flash->client->dev, "can't read led-max-microamp property for flash\n"); goto out_err; } - of_property_read_u32(flash->flash_node, "voltage-reference", - &cfg->voltage_reference); + fwnode_property_read_u32(flash->flash_node, "voltage-reference", + &cfg->voltage_reference); - of_property_read_u32(flash->flash_node, "ams,input-max-microamp", - &cfg->peak); + fwnode_property_read_u32(flash->flash_node, "ams,input-max-microamp", + &cfg->peak); cfg->peak = AS_PEAK_mA_TO_REG(cfg->peak); if (!flash->indicator_node) { @@ -568,15 +573,21 @@ static int as3645a_parse_node(struct as3645a *flash, goto out_err; } - rval = of_property_read_string(flash->indicator_node, "label", &name); - if (!rval) + rval = fwnode_property_read_string(flash->indicator_node, "label", + &name); + if (!rval) { strlcpy(names->indicator, name, sizeof(names->indicator)); - else + } else if (is_of_node(fwnode)) { snprintf(names->indicator, sizeof(names->indicator), - "%pOFn:indicator", node); + "%pOFn:indicator", to_of_node(fwnode)); + } else { + dev_err(&flash->client->dev, "indicator node has no label!\n"); + return -EINVAL; + } - rval = of_property_read_u32(flash->indicator_node, "led-max-microamp", - &cfg->indicator_max_ua); + rval = fwnode_property_read_u32(flash->indicator_node, + "led-max-microamp", + &cfg->indicator_max_ua); if (rval < 0) { dev_err(&flash->client->dev, "can't read led-max-microamp property for indicator\n"); @@ -586,8 +597,8 @@ static int as3645a_parse_node(struct as3645a *flash, return 0; out_err: - of_node_put(flash->flash_node); - of_node_put(flash->indicator_node); + fwnode_handle_put(flash->flash_node); + fwnode_handle_put(flash->indicator_node); return rval; } @@ -668,14 +679,14 @@ static int as3645a_v4l2_setup(struct as3645a *flash) strlcpy(cfgind.dev_name, flash->iled_cdev.name, sizeof(cfg.dev_name)); flash->vf = v4l2_flash_init( - &flash->client->dev, of_fwnode_handle(flash->flash_node), - &flash->fled, NULL, &cfg); + &flash->client->dev, flash->flash_node, &flash->fled, NULL, + &cfg); if (IS_ERR(flash->vf)) return PTR_ERR(flash->vf); flash->vfind = v4l2_flash_indicator_init( - &flash->client->dev, of_fwnode_handle(flash->indicator_node), - &flash->iled_cdev, &cfgind); + &flash->client->dev, flash->indicator_node, &flash->iled_cdev, + &cfgind); if (IS_ERR(flash->vfind)) { v4l2_flash_release(flash->vf); return PTR_ERR(flash->vfind); @@ -690,7 +701,7 @@ static int as3645a_probe(struct i2c_client *client) struct as3645a *flash; int rval; - if (client->dev.of_node == NULL) + if (!dev_fwnode(&client->dev)) return -ENODEV; flash = devm_kzalloc(&client->dev, sizeof(*flash), GFP_KERNEL); @@ -699,7 +710,7 @@ static int as3645a_probe(struct i2c_client *client) flash->client = client; - rval = as3645a_parse_node(flash, &names, client->dev.of_node); + rval = as3645a_parse_node(flash, &names, dev_fwnode(&client->dev)); if (rval < 0) return rval; @@ -731,8 +742,8 @@ out_mutex_destroy: mutex_destroy(&flash->mutex); out_put_nodes: - of_node_put(flash->flash_node); - of_node_put(flash->indicator_node); + fwnode_handle_put(flash->flash_node); + fwnode_handle_put(flash->indicator_node); return rval; } @@ -751,8 +762,8 @@ static int as3645a_remove(struct i2c_client *client) mutex_destroy(&flash->mutex); - of_node_put(flash->flash_node); - of_node_put(flash->indicator_node); + fwnode_handle_put(flash->flash_node); + fwnode_handle_put(flash->indicator_node); return 0; } diff --git a/drivers/leds/leds-blinkm.c b/drivers/leds/leds-blinkm.c index 851c1920b63c..11b771fb933b 100644 --- a/drivers/leds/leds-blinkm.c +++ b/drivers/leds/leds-blinkm.c @@ -594,7 +594,6 @@ static int blinkm_probe(struct i2c_client *client, goto exit; } - data->i2c_addr = 0x09; data->i2c_addr = 0x08; /* i2c addr - use fake addr of 0x08 initially (real is 0x09) */ data->fw_ver = 0xfe; diff --git a/drivers/leds/leds-lm3532.c b/drivers/leds/leds-lm3532.c new file mode 100644 index 000000000000..180895b83b88 --- /dev/null +++ b/drivers/leds/leds-lm3532.c @@ -0,0 +1,683 @@ +// SPDX-License-Identifier: GPL-2.0 +// TI LM3532 LED driver +// Copyright (C) 2019 Texas Instruments Incorporated - http://www.ti.com/ + +#include <linux/i2c.h> +#include <linux/leds.h> +#include <linux/slab.h> +#include <linux/regmap.h> +#include <linux/types.h> +#include <linux/regulator/consumer.h> +#include <linux/module.h> +#include <uapi/linux/uleds.h> +#include <linux/gpio/consumer.h> + +#define LM3532_NAME "lm3532-led" +#define LM3532_BL_MODE_MANUAL 0x00 +#define LM3532_BL_MODE_ALS 0x01 + +#define LM3532_REG_OUTPUT_CFG 0x10 +#define LM3532_REG_STARTSHUT_RAMP 0x11 +#define LM3532_REG_RT_RAMP 0x12 +#define LM3532_REG_PWM_A_CFG 0x13 +#define LM3532_REG_PWM_B_CFG 0x14 +#define LM3532_REG_PWM_C_CFG 0x15 +#define LM3532_REG_ZONE_CFG_A 0x16 +#define LM3532_REG_CTRL_A_BRT 0x17 +#define LM3532_REG_ZONE_CFG_B 0x18 +#define LM3532_REG_CTRL_B_BRT 0x19 +#define LM3532_REG_ZONE_CFG_C 0x1a +#define LM3532_REG_CTRL_C_BRT 0x1b +#define LM3532_REG_ENABLE 0x1d +#define LM3532_ALS_CONFIG 0x23 +#define LM3532_REG_ZN_0_HI 0x60 +#define LM3532_REG_ZN_0_LO 0x61 +#define LM3532_REG_ZN_1_HI 0x62 +#define LM3532_REG_ZN_1_LO 0x63 +#define LM3532_REG_ZN_2_HI 0x64 +#define LM3532_REG_ZN_2_LO 0x65 +#define LM3532_REG_ZN_3_HI 0x66 +#define LM3532_REG_ZN_3_LO 0x67 +#define LM3532_REG_MAX 0x7e + +/* Contorl Enable */ +#define LM3532_CTRL_A_ENABLE BIT(0) +#define LM3532_CTRL_B_ENABLE BIT(1) +#define LM3532_CTRL_C_ENABLE BIT(2) + +/* PWM Zone Control */ +#define LM3532_PWM_ZONE_MASK 0x7c +#define LM3532_PWM_ZONE_0_EN BIT(2) +#define LM3532_PWM_ZONE_1_EN BIT(3) +#define LM3532_PWM_ZONE_2_EN BIT(4) +#define LM3532_PWM_ZONE_3_EN BIT(5) +#define LM3532_PWM_ZONE_4_EN BIT(6) + +/* Brightness Configuration */ +#define LM3532_I2C_CTRL BIT(0) +#define LM3532_ALS_CTRL 0 +#define LM3532_LINEAR_MAP BIT(1) +#define LM3532_ZONE_MASK (BIT(2) | BIT(3) | BIT(4)) +#define LM3532_ZONE_0 0 +#define LM3532_ZONE_1 BIT(2) +#define LM3532_ZONE_2 BIT(3) +#define LM3532_ZONE_3 (BIT(2) | BIT(3)) +#define LM3532_ZONE_4 BIT(4) + +#define LM3532_ENABLE_ALS BIT(3) +#define LM3532_ALS_SEL_SHIFT 6 + +/* Zone Boundary Register */ +#define LM3532_ALS_WINDOW_mV 2000 +#define LM3532_ALS_ZB_MAX 4 +#define LM3532_ALS_OFFSET_mV 2 + +#define LM3532_CONTROL_A 0 +#define LM3532_CONTROL_B 1 +#define LM3532_CONTROL_C 2 +#define LM3532_MAX_CONTROL_BANKS 3 +#define LM3532_MAX_LED_STRINGS 3 + +#define LM3532_OUTPUT_CFG_MASK 0x3 +#define LM3532_BRT_VAL_ADJUST 8 +#define LM3532_RAMP_DOWN_SHIFT 3 + +#define LM3532_NUM_RAMP_VALS 8 +#define LM3532_NUM_AVG_VALS 8 +#define LM3532_NUM_IMP_VALS 32 + +/* + * struct lm3532_als_data + * @config - value of ALS configuration register + * @als1_imp_sel - value of ALS1 resistor select register + * @als2_imp_sel - value of ALS2 resistor select register + * @als_avrg_time - ALS averaging time + * @als_input_mode - ALS input mode for brightness control + * @als_vmin - Minimum ALS voltage + * @als_vmax - Maximum ALS voltage + * @zone_lo - values of ALS lo ZB(Zone Boundary) registers + * @zone_hi - values of ALS hi ZB(Zone Boundary) registers + */ +struct lm3532_als_data { + u8 config; + u8 als1_imp_sel; + u8 als2_imp_sel; + u8 als_avrg_time; + u8 als_input_mode; + u32 als_vmin; + u32 als_vmax; + u8 zones_lo[LM3532_ALS_ZB_MAX]; + u8 zones_hi[LM3532_ALS_ZB_MAX]; +}; + +/** + * struct lm3532_led + * @led_dev: led class device + * @priv - Pointer the device data structure + * @control_bank - Control bank the LED is associated to + * @mode - Mode of the LED string + * @num_leds - Number of LED strings are supported in this array + * @led_strings - The LED strings supported in this array + * @label - LED label + */ +struct lm3532_led { + struct led_classdev led_dev; + struct lm3532_data *priv; + + int control_bank; + int mode; + int num_leds; + u32 led_strings[LM3532_MAX_CONTROL_BANKS]; + char label[LED_MAX_NAME_SIZE]; +}; + +/** + * struct lm3532_data + * @enable_gpio - Hardware enable gpio + * @regulator: regulator + * @client: i2c client + * @regmap - Devices register map + * @dev - Pointer to the devices device struct + * @lock - Lock for reading/writing the device + * @als_data - Pointer to the als data struct + * @runtime_ramp_up - Runtime ramp up setting + * @runtime_ramp_down - Runtime ramp down setting + * @leds - Array of LED strings + */ +struct lm3532_data { + struct gpio_desc *enable_gpio; + struct regulator *regulator; + struct i2c_client *client; + struct regmap *regmap; + struct device *dev; + struct mutex lock; + + struct lm3532_als_data *als_data; + + u32 runtime_ramp_up; + u32 runtime_ramp_down; + + struct lm3532_led leds[]; +}; + +static const struct reg_default lm3532_reg_defs[] = { + {LM3532_REG_OUTPUT_CFG, 0xe4}, + {LM3532_REG_STARTSHUT_RAMP, 0xc0}, + {LM3532_REG_RT_RAMP, 0xc0}, + {LM3532_REG_PWM_A_CFG, 0x82}, + {LM3532_REG_PWM_B_CFG, 0x82}, + {LM3532_REG_PWM_C_CFG, 0x82}, + {LM3532_REG_ZONE_CFG_A, 0xf1}, + {LM3532_REG_CTRL_A_BRT, 0xf3}, + {LM3532_REG_ZONE_CFG_B, 0xf1}, + {LM3532_REG_CTRL_B_BRT, 0xf3}, + {LM3532_REG_ZONE_CFG_C, 0xf1}, + {LM3532_REG_CTRL_C_BRT, 0xf3}, + {LM3532_REG_ENABLE, 0xf8}, + {LM3532_ALS_CONFIG, 0x44}, + {LM3532_REG_ZN_0_HI, 0x35}, + {LM3532_REG_ZN_0_LO, 0x33}, + {LM3532_REG_ZN_1_HI, 0x6a}, + {LM3532_REG_ZN_1_LO, 0x66}, + {LM3532_REG_ZN_2_HI, 0xa1}, + {LM3532_REG_ZN_2_LO, 0x99}, + {LM3532_REG_ZN_3_HI, 0xdc}, + {LM3532_REG_ZN_3_LO, 0xcc}, +}; + +static const struct regmap_config lm3532_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + + .max_register = LM3532_REG_MAX, + .reg_defaults = lm3532_reg_defs, + .num_reg_defaults = ARRAY_SIZE(lm3532_reg_defs), + .cache_type = REGCACHE_FLAT, +}; + +const static int als_imp_table[LM3532_NUM_IMP_VALS] = {37000, 18500, 12330, + 92500, 7400, 6170, 5290, + 4630, 4110, 3700, 3360, + 3080, 2850, 2640, 2440, + 2310, 2180, 2060, 1950, + 1850, 1760, 1680, 1610, + 1540, 1480, 1420, 1370, + 1320, 1280, 1230, 1190}; +static int lm3532_get_als_imp_index(int als_imped) +{ + int i; + + if (als_imped > als_imp_table[1]) + return 0; + + if (als_imped < als_imp_table[LM3532_NUM_IMP_VALS - 1]) + return LM3532_NUM_IMP_VALS - 1; + + for (i = 1; i < LM3532_NUM_IMP_VALS; i++) { + if (als_imped == als_imp_table[i]) + return i; + + /* Find an approximate index by looking up the table */ + if (als_imped < als_imp_table[i - 1] && + als_imped > als_imp_table[i]) { + if (als_imped - als_imp_table[i - 1] < + als_imp_table[i] - als_imped) + return i + 1; + else + return i; + } + } + + return -EINVAL; +} + +static int lm3532_get_index(const int table[], int size, int value) +{ + int i; + + for (i = 1; i < size; i++) { + if (value == table[i]) + return i; + + /* Find an approximate index by looking up the table */ + if (value > table[i - 1] && + value < table[i]) { + if (value - table[i - 1] < table[i] - value) + return i - 1; + else + return i; + } + } + + return -EINVAL; +} + +const static int als_avrg_table[LM3532_NUM_AVG_VALS] = {17920, 35840, 71680, + 1433360, 286720, 573440, + 1146880, 2293760}; +static int lm3532_get_als_avg_index(int avg_time) +{ + if (avg_time <= als_avrg_table[0]) + return 0; + + if (avg_time > als_avrg_table[LM3532_NUM_AVG_VALS - 1]) + return LM3532_NUM_AVG_VALS - 1; + + return lm3532_get_index(&als_avrg_table[0], LM3532_NUM_AVG_VALS, + avg_time); +} + +const static int ramp_table[LM3532_NUM_RAMP_VALS] = { 8, 1024, 2048, 4096, 8192, + 16384, 32768, 65536}; +static int lm3532_get_ramp_index(int ramp_time) +{ + if (ramp_time <= ramp_table[0]) + return 0; + + if (ramp_time > ramp_table[LM3532_NUM_RAMP_VALS - 1]) + return LM3532_NUM_RAMP_VALS - 1; + + return lm3532_get_index(&ramp_table[0], LM3532_NUM_RAMP_VALS, + ramp_time); +} + +static int lm3532_led_enable(struct lm3532_led *led_data) +{ + int ctrl_en_val = BIT(led_data->control_bank); + int ret; + + ret = regmap_update_bits(led_data->priv->regmap, LM3532_REG_ENABLE, + ctrl_en_val, ctrl_en_val); + if (ret) { + dev_err(led_data->priv->dev, "Failed to set ctrl:%d\n", ret); + return ret; + } + + return regulator_enable(led_data->priv->regulator); +} + +static int lm3532_led_disable(struct lm3532_led *led_data) +{ + int ctrl_en_val = BIT(led_data->control_bank); + int ret; + + ret = regmap_update_bits(led_data->priv->regmap, LM3532_REG_ENABLE, + ctrl_en_val, ~ctrl_en_val); + if (ret) { + dev_err(led_data->priv->dev, "Failed to set ctrl:%d\n", ret); + return ret; + } + + return regulator_disable(led_data->priv->regulator); +} + +static int lm3532_brightness_set(struct led_classdev *led_cdev, + enum led_brightness brt_val) +{ + struct lm3532_led *led = + container_of(led_cdev, struct lm3532_led, led_dev); + u8 brightness_reg; + int ret; + + mutex_lock(&led->priv->lock); + + if (led->mode == LM3532_BL_MODE_ALS) { + if (brt_val > LED_OFF) + ret = lm3532_led_enable(led); + else + ret = lm3532_led_disable(led); + + goto unlock; + } + + if (brt_val == LED_OFF) { + ret = lm3532_led_disable(led); + goto unlock; + } + + ret = lm3532_led_enable(led); + if (ret) + goto unlock; + + brightness_reg = LM3532_REG_CTRL_A_BRT + led->control_bank * 2; + brt_val = brt_val / LM3532_BRT_VAL_ADJUST; + + ret = regmap_write(led->priv->regmap, brightness_reg, brt_val); + +unlock: + mutex_unlock(&led->priv->lock); + return ret; +} + +static int lm3532_init_registers(struct lm3532_led *led) +{ + struct lm3532_data *drvdata = led->priv; + unsigned int runtime_ramp_val; + unsigned int output_cfg_val = 0; + unsigned int output_cfg_shift = 0; + unsigned int output_cfg_mask = 0; + int ret, i; + + for (i = 0; i < led->num_leds; i++) { + output_cfg_shift = led->led_strings[i] * 2; + output_cfg_val |= (led->control_bank << output_cfg_shift); + output_cfg_mask |= LM3532_OUTPUT_CFG_MASK << output_cfg_shift; + } + + ret = regmap_update_bits(drvdata->regmap, LM3532_REG_OUTPUT_CFG, + output_cfg_mask, output_cfg_val); + if (ret) + return ret; + + runtime_ramp_val = drvdata->runtime_ramp_up | + (drvdata->runtime_ramp_down << LM3532_RAMP_DOWN_SHIFT); + + return regmap_write(drvdata->regmap, LM3532_REG_RT_RAMP, + runtime_ramp_val); +} + +static int lm3532_als_configure(struct lm3532_data *priv, + struct lm3532_led *led) +{ + struct lm3532_als_data *als = priv->als_data; + u32 als_vmin, als_vmax, als_vstep; + int zone_reg = LM3532_REG_ZN_0_HI; + int brightnes_config_reg; + int ret; + int i; + + als_vmin = als->als_vmin; + als_vmax = als->als_vmax; + + als_vstep = (als_vmax - als_vmin) / ((LM3532_ALS_ZB_MAX + 1) * 2); + + for (i = 0; i < LM3532_ALS_ZB_MAX; i++) { + als->zones_lo[i] = ((als_vmin + als_vstep + (i * als_vstep)) * + LED_FULL) / 1000; + als->zones_hi[i] = ((als_vmin + LM3532_ALS_OFFSET_mV + + als_vstep + (i * als_vstep)) * LED_FULL) / 1000; + + zone_reg = LM3532_REG_ZN_0_HI + i * 2; + ret = regmap_write(priv->regmap, zone_reg, als->zones_lo[i]); + if (ret) + return ret; + + zone_reg += 1; + ret = regmap_write(priv->regmap, zone_reg, als->zones_hi[i]); + if (ret) + return ret; + } + + als->config = (als->als_avrg_time | (LM3532_ENABLE_ALS) | + (als->als_input_mode << LM3532_ALS_SEL_SHIFT)); + + ret = regmap_write(priv->regmap, LM3532_ALS_CONFIG, als->config); + if (ret) + return ret; + + brightnes_config_reg = LM3532_REG_ZONE_CFG_A + led->control_bank * 2; + + return regmap_update_bits(priv->regmap, brightnes_config_reg, + LM3532_I2C_CTRL, LM3532_ALS_CTRL); +} + +static int lm3532_parse_als(struct lm3532_data *priv) +{ + struct lm3532_als_data *als; + int als_avg_time; + int als_impedance; + int ret; + + als = devm_kzalloc(priv->dev, sizeof(*als), GFP_KERNEL); + if (als == NULL) + return -ENOMEM; + + ret = device_property_read_u32(&priv->client->dev, "ti,als-vmin", + &als->als_vmin); + if (ret) + als->als_vmin = 0; + + ret = device_property_read_u32(&priv->client->dev, "ti,als-vmax", + &als->als_vmax); + if (ret) + als->als_vmax = LM3532_ALS_WINDOW_mV; + + if (als->als_vmax > LM3532_ALS_WINDOW_mV) { + ret = -EINVAL; + return ret; + } + + ret = device_property_read_u32(&priv->client->dev, "ti,als1-imp-sel", + &als_impedance); + if (ret) + als->als1_imp_sel = 0; + else + als->als1_imp_sel = lm3532_get_als_imp_index(als_impedance); + + ret = device_property_read_u32(&priv->client->dev, "ti,als2-imp-sel", + &als_impedance); + if (ret) + als->als2_imp_sel = 0; + else + als->als2_imp_sel = lm3532_get_als_imp_index(als_impedance); + + ret = device_property_read_u32(&priv->client->dev, "ti,als-avrg-time-us", + &als_avg_time); + if (ret) + als->als_avrg_time = 0; + else + als->als_avrg_time = lm3532_get_als_avg_index(als_avg_time); + + ret = device_property_read_u8(&priv->client->dev, "ti,als-input-mode", + &als->als_input_mode); + if (ret) + als->als_input_mode = 0; + + if (als->als_input_mode > LM3532_BL_MODE_ALS) { + ret = -EINVAL; + return ret; + } + + priv->als_data = als; + + return ret; +} + +static int lm3532_parse_node(struct lm3532_data *priv) +{ + struct fwnode_handle *child = NULL; + struct lm3532_led *led; + const char *name; + int control_bank; + u32 ramp_time; + size_t i = 0; + int ret; + + priv->enable_gpio = devm_gpiod_get_optional(&priv->client->dev, + "enable", GPIOD_OUT_LOW); + if (IS_ERR(priv->enable_gpio)) + priv->enable_gpio = NULL; + + priv->regulator = devm_regulator_get(&priv->client->dev, "vin"); + if (IS_ERR(priv->regulator)) + priv->regulator = NULL; + + ret = device_property_read_u32(&priv->client->dev, "ramp-up-us", + &ramp_time); + if (ret) + dev_info(&priv->client->dev, "ramp-up-ms property missing\n"); + else + priv->runtime_ramp_up = lm3532_get_ramp_index(ramp_time); + + ret = device_property_read_u32(&priv->client->dev, "ramp-down-us", + &ramp_time); + if (ret) + dev_info(&priv->client->dev, "ramp-down-ms property missing\n"); + else + priv->runtime_ramp_down = lm3532_get_ramp_index(ramp_time); + + device_for_each_child_node(priv->dev, child) { + led = &priv->leds[i]; + + ret = fwnode_property_read_u32(child, "reg", &control_bank); + if (ret) { + dev_err(&priv->client->dev, "reg property missing\n"); + fwnode_handle_put(child); + goto child_out; + } + + if (control_bank > LM3532_CONTROL_C) { + dev_err(&priv->client->dev, "Control bank invalid\n"); + continue; + } + + led->control_bank = control_bank; + + ret = fwnode_property_read_u32(child, "ti,led-mode", + &led->mode); + if (ret) { + dev_err(&priv->client->dev, "ti,led-mode property missing\n"); + fwnode_handle_put(child); + goto child_out; + } + + if (led->mode == LM3532_BL_MODE_ALS) { + ret = lm3532_parse_als(priv); + if (ret) + dev_err(&priv->client->dev, "Failed to parse als\n"); + else + lm3532_als_configure(priv, led); + } + + led->num_leds = fwnode_property_read_u32_array(child, + "led-sources", + NULL, 0); + + if (led->num_leds > LM3532_MAX_LED_STRINGS) { + dev_err(&priv->client->dev, "To many LED string defined\n"); + continue; + } + + ret = fwnode_property_read_u32_array(child, "led-sources", + led->led_strings, + led->num_leds); + if (ret) { + dev_err(&priv->client->dev, "led-sources property missing\n"); + fwnode_handle_put(child); + goto child_out; + } + + fwnode_property_read_string(child, "linux,default-trigger", + &led->led_dev.default_trigger); + + ret = fwnode_property_read_string(child, "label", &name); + if (ret) + snprintf(led->label, sizeof(led->label), + "%s::", priv->client->name); + else + snprintf(led->label, sizeof(led->label), + "%s:%s", priv->client->name, name); + + led->priv = priv; + led->led_dev.name = led->label; + led->led_dev.brightness_set_blocking = lm3532_brightness_set; + + ret = devm_led_classdev_register(priv->dev, &led->led_dev); + if (ret) { + dev_err(&priv->client->dev, "led register err: %d\n", + ret); + fwnode_handle_put(child); + goto child_out; + } + + lm3532_init_registers(led); + + i++; + } + +child_out: + return ret; +} + +static int lm3532_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct lm3532_data *drvdata; + int ret = 0; + int count; + + count = device_get_child_node_count(&client->dev); + if (!count) { + dev_err(&client->dev, "LEDs are not defined in device tree!"); + return -ENODEV; + } + + drvdata = devm_kzalloc(&client->dev, struct_size(drvdata, leds, count), + GFP_KERNEL); + if (drvdata == NULL) + return -ENOMEM; + + drvdata->client = client; + drvdata->dev = &client->dev; + + drvdata->regmap = devm_regmap_init_i2c(client, &lm3532_regmap_config); + if (IS_ERR(drvdata->regmap)) { + ret = PTR_ERR(drvdata->regmap); + dev_err(&client->dev, "Failed to allocate register map: %d\n", + ret); + return ret; + } + + mutex_init(&drvdata->lock); + i2c_set_clientdata(client, drvdata); + + ret = lm3532_parse_node(drvdata); + if (ret) { + dev_err(&client->dev, "Failed to parse node\n"); |