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author | John Crispin <john@phrozen.org> | 2017-08-18 18:11:52 +0200 |
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committer | John Crispin <john@phrozen.org> | 2017-08-18 18:41:41 +0200 |
commit | 1f068588efddf0175e954ffc07ec8478bddd52c7 (patch) | |
tree | 3e65bb1b6d076cac2597db4bcbf71a9fedee1099 /target/linux/mediatek/patches-4.9/0020-leds-Add-LED-support-for-MT6323-PMIC.patch | |
parent | 364befeccf01c07049b492d90e98c2c13457c7c3 (diff) | |
download | mtk-20170518-1f068588efddf0175e954ffc07ec8478bddd52c7.zip mtk-20170518-1f068588efddf0175e954ffc07ec8478bddd52c7.tar.gz mtk-20170518-1f068588efddf0175e954ffc07ec8478bddd52c7.tar.bz2 |
mediatek: update to latest kernel patchset from v4.13-rc
Signed-off-by: Muciri Gatimu <muciri@openmesh.com>
Signed-off-by: Shashidhar Lakkavalli <shashidhar.lakkavalli@openmesh.com>
Signed-off-by: John Crispin <john@phrozen.org>
Diffstat (limited to 'target/linux/mediatek/patches-4.9/0020-leds-Add-LED-support-for-MT6323-PMIC.patch')
-rw-r--r-- | target/linux/mediatek/patches-4.9/0020-leds-Add-LED-support-for-MT6323-PMIC.patch | 539 |
1 files changed, 539 insertions, 0 deletions
diff --git a/target/linux/mediatek/patches-4.9/0020-leds-Add-LED-support-for-MT6323-PMIC.patch b/target/linux/mediatek/patches-4.9/0020-leds-Add-LED-support-for-MT6323-PMIC.patch new file mode 100644 index 0000000..37b926d --- /dev/null +++ b/target/linux/mediatek/patches-4.9/0020-leds-Add-LED-support-for-MT6323-PMIC.patch @@ -0,0 +1,539 @@ +From e482f9590f2e831c68bcf85e3f9f4c88bbd3329f Mon Sep 17 00:00:00 2001 +From: Sean Wang <sean.wang@mediatek.com> +Date: Mon, 20 Mar 2017 14:47:26 +0800 +Subject: [PATCH 20/57] leds: Add LED support for MT6323 PMIC + +MT6323 PMIC is a multi-function device that includes LED function. +It allows attaching up to 4 LEDs which can either be on, off or dimmed +and/or blinked with the controller. + +Signed-off-by: Sean Wang <sean.wang@mediatek.com> +Reviewed-by: Jacek Anaszewski <jacek.anaszewski@gmail.com> +--- + drivers/leds/Kconfig | 8 + + drivers/leds/leds-mt6323.c | 502 +++++++++++++++++++++++++++++++++++++++++++++ + 2 files changed, 510 insertions(+) + create mode 100644 drivers/leds/leds-mt6323.c + +--- a/drivers/leds/Kconfig ++++ b/drivers/leds/Kconfig +@@ -117,6 +117,14 @@ config LEDS_MIKROTIK_RB532 + This option enables support for the so called "User LED" of + Mikrotik's Routerboard 532. + ++config LEDS_MT6323 ++ tristate "LED Support for Mediatek MT6323 PMIC" ++ depends on LEDS_CLASS ++ depends on MFD_MT6397 ++ help ++ This option enables support for on-chip LED drivers found on ++ Mediatek MT6323 PMIC. ++ + config LEDS_S3C24XX + tristate "LED Support for Samsung S3C24XX GPIO LEDs" + depends on LEDS_CLASS +--- /dev/null ++++ b/drivers/leds/leds-mt6323.c +@@ -0,0 +1,502 @@ ++/* ++ * LED driver for Mediatek MT6323 PMIC ++ * ++ * Copyright (C) 2017 Sean Wang <sean.wang@mediatek.com> ++ * ++ * This program is free software; you can redistribute it and/or ++ * modify it under the terms of the GNU General Public License as ++ * published by the Free Software Foundation; either version 2 of ++ * the License, or (at your option) any later version. ++ * ++ * 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. ++ */ ++#include <linux/kernel.h> ++#include <linux/leds.h> ++#include <linux/mfd/mt6323/registers.h> ++#include <linux/mfd/mt6397/core.h> ++#include <linux/module.h> ++#include <linux/of.h> ++#include <linux/platform_device.h> ++#include <linux/regmap.h> ++ ++/* ++ * Register field for MT6323_TOP_CKPDN0 to enable ++ * 32K clock common for LED device. ++ */ ++#define MT6323_RG_DRV_32K_CK_PDN BIT(11) ++#define MT6323_RG_DRV_32K_CK_PDN_MASK BIT(11) ++ ++/* ++ * Register field for MT6323_TOP_CKPDN2 to enable ++ * individual clock for LED device. ++ */ ++#define MT6323_RG_ISINK_CK_PDN(i) BIT(i) ++#define MT6323_RG_ISINK_CK_PDN_MASK(i) BIT(i) ++ ++/* ++ * Register field for MT6323_TOP_CKCON1 to select ++ * clock source. ++ */ ++#define MT6323_RG_ISINK_CK_SEL_MASK(i) (BIT(10) << (i)) ++ ++/* ++ * Register for MT6323_ISINK_CON0 to setup the ++ * duty cycle of the blink. ++ */ ++#define MT6323_ISINK_CON0(i) (MT6323_ISINK0_CON0 + 0x8 * (i)) ++#define MT6323_ISINK_DIM_DUTY_MASK (0x1f << 8) ++#define MT6323_ISINK_DIM_DUTY(i) (((i) << 8) & \ ++ MT6323_ISINK_DIM_DUTY_MASK) ++ ++/* Register to setup the period of the blink. */ ++#define MT6323_ISINK_CON1(i) (MT6323_ISINK0_CON1 + 0x8 * (i)) ++#define MT6323_ISINK_DIM_FSEL_MASK (0xffff) ++#define MT6323_ISINK_DIM_FSEL(i) ((i) & MT6323_ISINK_DIM_FSEL_MASK) ++ ++/* Register to control the brightness. */ ++#define MT6323_ISINK_CON2(i) (MT6323_ISINK0_CON2 + 0x8 * (i)) ++#define MT6323_ISINK_CH_STEP_SHIFT 12 ++#define MT6323_ISINK_CH_STEP_MASK (0x7 << 12) ++#define MT6323_ISINK_CH_STEP(i) (((i) << 12) & \ ++ MT6323_ISINK_CH_STEP_MASK) ++#define MT6323_ISINK_SFSTR0_TC_MASK (0x3 << 1) ++#define MT6323_ISINK_SFSTR0_TC(i) (((i) << 1) & \ ++ MT6323_ISINK_SFSTR0_TC_MASK) ++#define MT6323_ISINK_SFSTR0_EN_MASK BIT(0) ++#define MT6323_ISINK_SFSTR0_EN BIT(0) ++ ++/* Register to LED channel enablement. */ ++#define MT6323_ISINK_CH_EN_MASK(i) BIT(i) ++#define MT6323_ISINK_CH_EN(i) BIT(i) ++ ++#define MT6323_MAX_PERIOD 10000 ++#define MT6323_MAX_LEDS 4 ++#define MT6323_MAX_BRIGHTNESS 6 ++#define MT6323_UNIT_DUTY 3125 ++#define MT6323_CAL_HW_DUTY(o, p) DIV_ROUND_CLOSEST((o) * 100000ul,\ ++ (p) * MT6323_UNIT_DUTY) ++ ++struct mt6323_leds; ++ ++/** ++ * struct mt6323_led - state container for the LED device ++ * @id: the identifier in MT6323 LED device ++ * @parent: the pointer to MT6323 LED controller ++ * @cdev: LED class device for this LED device ++ * @current_brightness: current state of the LED device ++ */ ++struct mt6323_led { ++ int id; ++ struct mt6323_leds *parent; ++ struct led_classdev cdev; ++ enum led_brightness current_brightness; ++}; ++ ++/** ++ * struct mt6323_leds - state container for holding LED controller ++ * of the driver ++ * @dev: the device pointer ++ * @hw: the underlying hardware providing shared ++ * bus for the register operations ++ * @lock: the lock among process context ++ * @led: the array that contains the state of individual ++ * LED device ++ */ ++struct mt6323_leds { ++ struct device *dev; ++ struct mt6397_chip *hw; ++ /* protect among process context */ ++ struct mutex lock; ++ struct mt6323_led *led[MT6323_MAX_LEDS]; ++}; ++ ++static int mt6323_led_hw_brightness(struct led_classdev *cdev, ++ enum led_brightness brightness) ++{ ++ struct mt6323_led *led = container_of(cdev, struct mt6323_led, cdev); ++ struct mt6323_leds *leds = led->parent; ++ struct regmap *regmap = leds->hw->regmap; ++ u32 con2_mask = 0, con2_val = 0; ++ int ret; ++ ++ /* ++ * Setup current output for the corresponding ++ * brightness level. ++ */ ++ con2_mask |= MT6323_ISINK_CH_STEP_MASK | ++ MT6323_ISINK_SFSTR0_TC_MASK | ++ MT6323_ISINK_SFSTR0_EN_MASK; ++ con2_val |= MT6323_ISINK_CH_STEP(brightness - 1) | ++ MT6323_ISINK_SFSTR0_TC(2) | ++ MT6323_ISINK_SFSTR0_EN; ++ ++ ret = regmap_update_bits(regmap, MT6323_ISINK_CON2(led->id), ++ con2_mask, con2_val); ++ return ret; ++} ++ ++static int mt6323_led_hw_off(struct led_classdev *cdev) ++{ ++ struct mt6323_led *led = container_of(cdev, struct mt6323_led, cdev); ++ struct mt6323_leds *leds = led->parent; ++ struct regmap *regmap = leds->hw->regmap; ++ unsigned int status; ++ int ret; ++ ++ status = MT6323_ISINK_CH_EN(led->id); ++ ret = regmap_update_bits(regmap, MT6323_ISINK_EN_CTRL, ++ MT6323_ISINK_CH_EN_MASK(led->id), ~status); ++ if (ret < 0) ++ return ret; ++ ++ usleep_range(100, 300); ++ ret = regmap_update_bits(regmap, MT6323_TOP_CKPDN2, ++ MT6323_RG_ISINK_CK_PDN_MASK(led->id), ++ MT6323_RG_ISINK_CK_PDN(led->id)); ++ if (ret < 0) ++ return ret; ++ ++ return 0; ++} ++ ++static enum led_brightness ++mt6323_get_led_hw_brightness(struct led_classdev *cdev) ++{ ++ struct mt6323_led *led = container_of(cdev, struct mt6323_led, cdev); ++ struct mt6323_leds *leds = led->parent; ++ struct regmap *regmap = leds->hw->regmap; ++ unsigned int status; ++ int ret; ++ ++ ret = regmap_read(regmap, MT6323_TOP_CKPDN2, &status); ++ if (ret < 0) ++ return ret; ++ ++ if (status & MT6323_RG_ISINK_CK_PDN_MASK(led->id)) ++ return 0; ++ ++ ret = regmap_read(regmap, MT6323_ISINK_EN_CTRL, &status); ++ if (ret < 0) ++ return ret; ++ ++ if (!(status & MT6323_ISINK_CH_EN(led->id))) ++ return 0; ++ ++ ret = regmap_read(regmap, MT6323_ISINK_CON2(led->id), &status); ++ if (ret < 0) ++ return ret; ++ ++ return ((status & MT6323_ISINK_CH_STEP_MASK) ++ >> MT6323_ISINK_CH_STEP_SHIFT) + 1; ++} ++ ++static int mt6323_led_hw_on(struct led_classdev *cdev, ++ enum led_brightness brightness) ++{ ++ struct mt6323_led *led = container_of(cdev, struct mt6323_led, cdev); ++ struct mt6323_leds *leds = led->parent; ++ struct regmap *regmap = leds->hw->regmap; ++ unsigned int status; ++ int ret; ++ ++ /* ++ * Setup required clock source, enable the corresponding ++ * clock and channel and let work with continuous blink as ++ * the default. ++ */ ++ ret = regmap_update_bits(regmap, MT6323_TOP_CKCON1, ++ MT6323_RG_ISINK_CK_SEL_MASK(led->id), 0); ++ if (ret < 0) ++ return ret; ++ ++ status = MT6323_RG_ISINK_CK_PDN(led->id); ++ ret = regmap_update_bits(regmap, MT6323_TOP_CKPDN2, ++ MT6323_RG_ISINK_CK_PDN_MASK(led->id), ++ ~status); ++ if (ret < 0) ++ return ret; ++ ++ usleep_range(100, 300); ++ ++ ret = regmap_update_bits(regmap, MT6323_ISINK_EN_CTRL, ++ MT6323_ISINK_CH_EN_MASK(led->id), ++ MT6323_ISINK_CH_EN(led->id)); ++ if (ret < 0) ++ return ret; ++ ++ ret = mt6323_led_hw_brightness(cdev, brightness); ++ if (ret < 0) ++ return ret; ++ ++ ret = regmap_update_bits(regmap, MT6323_ISINK_CON0(led->id), ++ MT6323_ISINK_DIM_DUTY_MASK, ++ MT6323_ISINK_DIM_DUTY(31)); ++ if (ret < 0) ++ return ret; ++ ++ ret = regmap_update_bits(regmap, MT6323_ISINK_CON1(led->id), ++ MT6323_ISINK_DIM_FSEL_MASK, ++ MT6323_ISINK_DIM_FSEL(1000)); ++ if (ret < 0) ++ return ret; ++ ++ return 0; ++} ++ ++static int mt6323_led_set_blink(struct led_classdev *cdev, ++ unsigned long *delay_on, ++ unsigned long *delay_off) ++{ ++ struct mt6323_led *led = container_of(cdev, struct mt6323_led, cdev); ++ struct mt6323_leds *leds = led->parent; ++ struct regmap *regmap = leds->hw->regmap; ++ unsigned long period; ++ u8 duty_hw; ++ int ret; ++ ++ /* ++ * Units are in ms, if over the hardware able ++ * to support, fallback into software blink ++ */ ++ period = *delay_on + *delay_off; ++ ++ if (period > MT6323_MAX_PERIOD) ++ return -EINVAL; ++ ++ /* ++ * LED subsystem requires a default user ++ * friendly blink pattern for the LED so using ++ * 1Hz duty cycle 50% here if without specific ++ * value delay_on and delay off being assigned. ++ */ ++ if (!*delay_on && !*delay_off) { ++ *delay_on = 500; ++ *delay_off = 500; ++ } ++ ++ /* ++ * Calculate duty_hw based on the percentage of period during ++ * which the led is ON. ++ */ ++ duty_hw = MT6323_CAL_HW_DUTY(*delay_on, period); ++ ++ /* hardware doesn't support zero duty cycle. */ ++ if (!duty_hw) ++ return -EINVAL; ++ ++ mutex_lock(&leds->lock); ++ /* ++ * Set max_brightness as the software blink behavior ++ * when no blink brightness. ++ */ ++ if (!led->current_brightness) { ++ ret = mt6323_led_hw_on(cdev, cdev->max_brightness); ++ if (ret < 0) ++ goto out; ++ led->current_brightness = cdev->max_brightness; ++ } ++ ++ ret = regmap_update_bits(regmap, MT6323_ISINK_CON0(led->id), ++ MT6323_ISINK_DIM_DUTY_MASK, ++ MT6323_ISINK_DIM_DUTY(duty_hw - 1)); ++ if (ret < 0) ++ goto out; ++ ++ ret = regmap_update_bits(regmap, MT6323_ISINK_CON1(led->id), ++ MT6323_ISINK_DIM_FSEL_MASK, ++ MT6323_ISINK_DIM_FSEL(period - 1)); ++out: ++ mutex_unlock(&leds->lock); ++ ++ return ret; ++} ++ ++static int mt6323_led_set_brightness(struct led_classdev *cdev, ++ enum led_brightness brightness) ++{ ++ struct mt6323_led *led = container_of(cdev, struct mt6323_led, cdev); ++ struct mt6323_leds *leds = led->parent; ++ int ret; ++ ++ mutex_lock(&leds->lock); ++ ++ if (!led->current_brightness && brightness) { ++ ret = mt6323_led_hw_on(cdev, brightness); ++ if (ret < 0) ++ goto out; ++ } else if (brightness) { ++ ret = mt6323_led_hw_brightness(cdev, brightness); ++ if (ret < 0) ++ goto out; ++ } else { ++ ret = mt6323_led_hw_off(cdev); ++ if (ret < 0) ++ goto out; ++ } ++ ++ led->current_brightness = brightness; ++out: ++ mutex_unlock(&leds->lock); ++ ++ return ret; ++} ++ ++static int mt6323_led_set_dt_default(struct led_classdev *cdev, ++ struct device_node *np) ++{ ++ struct mt6323_led *led = container_of(cdev, struct mt6323_led, cdev); ++ const char *state; ++ int ret = 0; ++ ++ led->cdev.name = of_get_property(np, "label", NULL) ? : np->name; ++ led->cdev.default_trigger = of_get_property(np, ++ "linux,default-trigger", ++ NULL); ++ ++ state = of_get_property(np, "default-state", NULL); ++ if (state) { ++ if (!strcmp(state, "keep")) { ++ ret = mt6323_get_led_hw_brightness(cdev); ++ if (ret < 0) ++ return ret; ++ led->current_brightness = ret; ++ ret = 0; ++ } else if (!strcmp(state, "on")) { ++ ret = ++ mt6323_led_set_brightness(cdev, cdev->max_brightness); ++ } else { ++ ret = mt6323_led_set_brightness(cdev, LED_OFF); ++ } ++ } ++ ++ return ret; ++} ++ ++static int mt6323_led_probe(struct platform_device *pdev) ++{ ++ struct device *dev = &pdev->dev; ++ struct device_node *np = pdev->dev.of_node; ++ struct device_node *child; ++ struct mt6397_chip *hw = dev_get_drvdata(pdev->dev.parent); ++ struct mt6323_leds *leds; ++ struct mt6323_led *led; ++ int ret; ++ unsigned int status; ++ u32 reg; ++ ++ leds = devm_kzalloc(dev, sizeof(*leds), GFP_KERNEL); ++ if (!leds) ++ return -ENOMEM; ++ ++ platform_set_drvdata(pdev, leds); ++ leds->dev = dev; ++ ++ /* ++ * leds->hw points to the underlying bus for the register ++ * controlled. ++ */ ++ leds->hw = hw; ++ mutex_init(&leds->lock); ++ ++ status = MT6323_RG_DRV_32K_CK_PDN; ++ ret = regmap_update_bits(leds->hw->regmap, MT6323_TOP_CKPDN0, ++ MT6323_RG_DRV_32K_CK_PDN_MASK, ~status); ++ if (ret < 0) { ++ dev_err(leds->dev, ++ "Failed to update MT6323_TOP_CKPDN0 Register\n"); ++ return ret; ++ } ++ ++ for_each_available_child_of_node(np, child) { ++ ret = of_property_read_u32(child, "reg", ®); ++ if (ret) { ++ dev_err(dev, "Failed to read led 'reg' property\n"); ++ goto put_child_node; ++ } ++ ++ if (reg < 0 || reg > MT6323_MAX_LEDS || leds->led[reg]) { ++ dev_err(dev, "Invalid led reg %u\n", reg); ++ ret = -EINVAL; ++ goto put_child_node; ++ } ++ ++ led = devm_kzalloc(dev, sizeof(*led), GFP_KERNEL); ++ if (!led) { ++ ret = -ENOMEM; ++ goto put_child_node; ++ } ++ ++ leds->led[reg] = led; ++ leds->led[reg]->id = reg; ++ leds->led[reg]->cdev.max_brightness = MT6323_MAX_BRIGHTNESS; ++ leds->led[reg]->cdev.brightness_set_blocking = ++ mt6323_led_set_brightness; ++ leds->led[reg]->cdev.blink_set = mt6323_led_set_blink; ++ leds->led[reg]->cdev.brightness_get = ++ mt6323_get_led_hw_brightness; ++ leds->led[reg]->parent = leds; ++ ++ ret = mt6323_led_set_dt_default(&leds->led[reg]->cdev, child); ++ if (ret < 0) { ++ dev_err(leds->dev, ++ "Failed to LED set default from devicetree\n"); ++ goto put_child_node; ++ } ++ ++ ret = devm_led_classdev_register(dev, &leds->led[reg]->cdev); ++ if (ret) { ++ dev_err(&pdev->dev, "Failed to register LED: %d\n", ++ ret); ++ goto put_child_node; ++ } ++ leds->led[reg]->cdev.dev->of_node = child; ++ } ++ ++ return 0; ++ ++put_child_node: ++ of_node_put(child); ++ return ret; ++} ++ ++static int mt6323_led_remove(struct platform_device *pdev) ++{ ++ struct mt6323_leds *leds = platform_get_drvdata(pdev); ++ int i; ++ ++ /* Turn the LEDs off on driver removal. */ ++ for (i = 0 ; leds->led[i] ; i++) ++ mt6323_led_hw_off(&leds->led[i]->cdev); ++ ++ regmap_update_bits(leds->hw->regmap, MT6323_TOP_CKPDN0, ++ MT6323_RG_DRV_32K_CK_PDN_MASK, ++ MT6323_RG_DRV_32K_CK_PDN); ++ ++ mutex_destroy(&leds->lock); ++ ++ return 0; ++} ++ ++static const struct of_device_id mt6323_led_dt_match[] = { ++ { .compatible = "mediatek,mt6323-led" }, ++ {}, ++}; ++MODULE_DEVICE_TABLE(of, mt6323_led_dt_match); ++ ++static struct platform_driver mt6323_led_driver = { ++ .probe = mt6323_led_probe, ++ .remove = mt6323_led_remove, ++ .driver = { ++ .name = "mt6323-led", ++ .of_match_table = mt6323_led_dt_match, ++ }, ++}; ++ ++module_platform_driver(mt6323_led_driver); ++ ++MODULE_DESCRIPTION("LED driver for Mediatek MT6323 PMIC"); ++MODULE_AUTHOR("Sean Wang <sean.wang@mediatek.com>"); ++MODULE_LICENSE("GPL"); |