diff options
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-4.9/0087-pmic-led2.patch | |
parent | 364befeccf01c07049b492d90e98c2c13457c7c3 (diff) | |
download | upstream-1f068588efddf0175e954ffc07ec8478bddd52c7.tar.gz upstream-1f068588efddf0175e954ffc07ec8478bddd52c7.tar.bz2 upstream-1f068588efddf0175e954ffc07ec8478bddd52c7.zip |
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-4.9/0087-pmic-led2.patch')
-rw-r--r-- | target/linux/mediatek/patches-4.9/0087-pmic-led2.patch | 554 |
1 files changed, 0 insertions, 554 deletions
diff --git a/target/linux/mediatek/patches-4.9/0087-pmic-led2.patch b/target/linux/mediatek/patches-4.9/0087-pmic-led2.patch deleted file mode 100644 index f0d706cd44..0000000000 --- a/target/linux/mediatek/patches-4.9/0087-pmic-led2.patch +++ /dev/null @@ -1,554 +0,0 @@ -From patchwork Mon Mar 20 06:47:26 2017 -Content-Type: text/plain; charset="utf-8" -MIME-Version: 1.0 -Content-Transfer-Encoding: 7bit -Subject: [v6,3/4] leds: Add LED support for MT6323 PMIC -From: sean.wang@mediatek.com -X-Patchwork-Id: 9633081 -Message-Id: <1489992447-13007-4-git-send-email-sean.wang@mediatek.com> -To: <rpurdie@rpsys.net>, <jacek.anaszewski@gmail.com>, <lee.jones@linaro.org>, - <matthias.bgg@gmail.com>, <pavel@ucw.cz>, <robh+dt@kernel.org>, - <mark.rutland@arm.com> -Cc: devicetree@vger.kernel.org, keyhaede@gmail.com, - Sean Wang <sean.wang@mediatek.com>, linux-kernel@vger.kernel.org, - linux-mediatek@lists.infradead.org, linux-leds@vger.kernel.org, - linux-arm-kernel@lists.infradead.org -Date: Mon, 20 Mar 2017 14:47:26 +0800 - -From: Sean Wang <sean.wang@mediatek.com> - -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/Makefile | 1 + - drivers/leds/leds-mt6323.c | 502 +++++++++++++++++++++++++++++++++++++++++++++ - 3 files changed, 511 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"); |