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Wed, 03 Jun 2020 23:26:56 -0700 (PDT) From: Gene Chen To: jacek.anaszewski@gmail.com, pavel@ucw.cz, matthias.bgg@gmail.com Cc: dmurphy@ti.com, linux-leds@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org, gene_chen@richtek.com, Wilma.Wu@mediatek.com, shufan_lee@richtek.com, cy_huang@richtek.com, benjamin.chao@mediatek.com Subject: [PATCH] leds: mt6360: Add LED driver for MT6360 Date: Thu, 4 Jun 2020 14:26:44 +0800 Message-Id: <1591252004-12681-1-git-send-email-gene.chen.richtek@gmail.com> X-Mailer: git-send-email 2.7.4 Sender: linux-leds-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-leds@vger.kernel.org From: Gene Chen Add MT6360 LED driver include 2-channel Flash LED with torch/strobe mode, and 3-channel RGB LED support Register/Flash/Breath Mode Signed-off-by: Gene Chen base-commit: 098c4adf249c198519a4abebe482b1e6b8c50e47 --- drivers/leds/Kconfig | 11 + drivers/leds/Makefile | 1 + drivers/leds/leds-mt6360.c | 1061 ++++++++++++++++++++++++++++++++++++++++++++ include/linux/mfd/mt6360.h | 6 +- 4 files changed, 1078 insertions(+), 1 deletion(-) create mode 100644 drivers/leds/leds-mt6360.c diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig index c664d84..c47be91 100644 --- a/drivers/leds/Kconfig +++ b/drivers/leds/Kconfig @@ -229,6 +229,17 @@ config LEDS_MT6323 This option enables support for on-chip LED drivers found on Mediatek MT6323 PMIC. +config LEDS_MT6360 + tristate "LED Support for Mediatek MT6360 PMIC" + depends on LEDS_CLASS_FLASH && OF + depends on V4L2_FLASH_LED_CLASS || !V4L2_FLASH_LED_CLASS + depends on MFD_MT6360 + help + This option enables support for dual Flash LED drivers found on + Mediatek MT6360 PMIC. + Support Torch and Strobe mode independently current source. + Include Low-VF and short protection. + config LEDS_S3C24XX tristate "LED Support for Samsung S3C24XX GPIO LEDs" depends on LEDS_CLASS diff --git a/drivers/leds/Makefile b/drivers/leds/Makefile index 45235d5..2883b4d 100644 --- a/drivers/leds/Makefile +++ b/drivers/leds/Makefile @@ -63,6 +63,7 @@ obj-$(CONFIG_LEDS_MIKROTIK_RB532) += leds-rb532.o obj-$(CONFIG_LEDS_MLXCPLD) += leds-mlxcpld.o obj-$(CONFIG_LEDS_MLXREG) += leds-mlxreg.o obj-$(CONFIG_LEDS_MT6323) += leds-mt6323.o +obj-$(CONFIG_LEDS_MT6360) += leds-mt6360.o obj-$(CONFIG_LEDS_NET48XX) += leds-net48xx.o obj-$(CONFIG_LEDS_NETXBIG) += leds-netxbig.o obj-$(CONFIG_LEDS_NIC78BX) += leds-nic78bx.o diff --git a/drivers/leds/leds-mt6360.c b/drivers/leds/leds-mt6360.c new file mode 100644 index 0000000..3e62547 --- /dev/null +++ b/drivers/leds/leds-mt6360.c @@ -0,0 +1,1061 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) 2020 MediaTek Inc. + * + * Author: Gene Chen + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include + +enum { + MT6360_LED_ISINK1 = 0, + MT6360_LED_ISINK2, + MT6360_LED_ISINK3, + MT6360_LED_ISINK4, + MT6360_LED_MAX, +}; + +enum { + MT6360_LEDMODE_PWM = 0, + MT6360_LEDMODE_BREATH, + MT6360_LEDMODE_CC, + MT6360_LEDMODE_MAX, +}; + +enum { + MT6360_FLED_CH1 = 0, + MT6360_FLED_CH2, + MT6360_FLED_MAX, +}; + +/* ILED setting/reg */ +#define MT6360_SINKCUR_MAX1 (0x0d) +#define MT6360_SINKCUR_MAX2 (0x0d) +#define MT6360_SINKCUR_MAX3 (0x0d) +#define MT6360_SINKCUR_MAX4 (0x1f) +#define MT6360_CURRSEL_REG1 (MT6360_PMU_RGB1_ISNK) +#define MT6360_CURRSEL_REG2 (MT6360_PMU_RGB2_ISNK) +#define MT6360_CURRSEL_REG3 (MT6360_PMU_RGB3_ISNK) +#define MT6360_CURRSEL_REG4 (MT6360_PMU_RGB_ML_ISNK) +#define MT6360_CURRSEL_MASK1 (0x0f) +#define MT6360_CURRSEL_MASK2 (0x0f) +#define MT6360_CURRSEL_MASK3 (0x0f) +#define MT6360_CURRSEL_MASK4 (0x1f) +#define MT6360_LEDMODE_REG1 (MT6360_PMU_RGB1_ISNK) +#define MT6360_LEDMODE_REG2 (MT6360_PMU_RGB2_ISNK) +#define MT6360_LEDMODE_REG3 (MT6360_PMU_RGB3_ISNK) +#define MT6360_LEDMODE_REG4 (0) +#define MT6360_LEDMODE_MASK1 (0xc0) +#define MT6360_LEDMODE_MASK2 (0xc0) +#define MT6360_LEDMODE_MASK3 (0xc0) +#define MT6360_LEDMODE_MASK4 (0) +#define MT6360_PWMDUTY_REG1 (MT6360_PMU_RGB1_DIM) +#define MT6360_PWMDUTY_REG2 (MT6360_PMU_RGB2_DIM) +#define MT6360_PWMDUTY_REG3 (MT6360_PMU_RGB3_DIM) +#define MT6360_PWMDUTY_REG4 (0) +#define MT6360_PWMDUTY_MASK1 (0xff) +#define MT6360_PWMDUTY_MASK2 (0xff) +#define MT6360_PWMDUTY_MASK3 (0xff) +#define MT6360_PWMDUTY_MASK4 (0) +#define MT6360_PWMFREQ_REG1 (MT6360_PMU_RGB12_Freq) +#define MT6360_PWMFREQ_REG2 (MT6360_PMU_RGB12_Freq) +#define MT6360_PWMFREQ_REG3 (MT6360_PMU_RGB34_Freq) +#define MT6360_PWMFREQ_REG4 (0) +#define MT6360_PWMFREQ_MASK1 (0xe0) +#define MT6360_PWMFREQ_MASK2 (0x1c) +#define MT6360_PWMFREQ_MASK3 (0xe0) +#define MT6360_PWMFREQ_MASK4 (0) +#define MT6360_BREATH_REGBASE1 (MT6360_PMU_RGB1_Tr) +#define MT6360_BREATH_REGBASE2 (MT6360_PMU_RGB2_Tr) +#define MT6360_BREATH_REGBASE3 (MT6360_PMU_RGB3_Tr) +#define MT6360_BREATH_REGBASE4 (0) +#define MT6360_LEDEN_MASK1 (0x80) +#define MT6360_LEDEN_MASK2 (0x40) +#define MT6360_LEDEN_MASK3 (0x20) +#define MT6360_LEDEN_MASK4 (0x10) +#define MT6360_LEDEN_REG (MT6360_PMU_RGB_EN) +#define MT6360_LEDALLEN_MASK (0xf0) + +#define MT6360_CHRIND_MASK (0x08) + +/* pattern order -> toff, tr1, tr2, ton, tf1, tf2 */ +#define MT6360_BRPATTERN_NUM (6) +#define MT6360_BREATHREG_NUM (3) + +/* FLED setting */ +#define MT6360_CSENABLE_REG1 (MT6360_PMU_FLED_EN) +#define MT6360_CSENABLE_MASK1 (0x02) +#define MT6360_CSENABLE_REG2 (MT6360_PMU_FLED_EN) +#define MT6360_CSENABLE_MASK2 (0x01) +#define MT6360_TORBRIGHT_MAX1 (0x1f) +#define MT6360_TORBRIGHT_MAX2 (0x1f) +#define MT6360_TORBRIGHT_REG1 (MT6360_PMU_FLED1_TOR_CTRL) +#define MT6360_TORBRIGHT_MASK1 (0x1f) +#define MT6360_STRBRIGHT_REG1 (MT6360_PMU_FLED1_STRB_CTRL2) +#define MT6360_STRBRIGHT_MASK1 (0x7f) +#define MT6360_TORBRIGHT_REG2 (MT6360_PMU_FLED2_TOR_CTRL) +#define MT6360_TORBRIGHT_MASK2 (0x1f) +#define MT6360_STRBRIGHT_REG2 (MT6360_PMU_FLED2_STRB_CTRL2) +#define MT6360_STRBRIGHT_MASK2 (0x7f) +#define MT6360_TORENABLE_REG1 (MT6360_PMU_FLED_EN) +#define MT6360_TORENABLE_MASK1 (0x08) +#define MT6360_TORENABLE_REG2 (MT6360_PMU_FLED_EN) +#define MT6360_TORENABLE_MASK2 (0x08) +#define MT6360_STRBENABLE_REG1 (MT6360_PMU_FLED_EN) +#define MT6360_STRBENABLE_MASK1 (0x06) +#define MT6360_STRBENABLE_REG2 (MT6360_PMU_FLED_EN) +#define MT6360_STRBENABLE_MASK2 (0x04) +#define MT6360_STRBTIMEOUT_REG (MT6360_PMU_FLED_STRB_CTRL) +#define MT6360_STRBTIMEOUT_MASK (0x7f) +#define MT6360_TORCHCUR_MIN (25000) +#define MT6360_TORCHCUR_STEP (12500) +#define MT6360_TORCHCUR_MAX (400000) +#define MT6360_STROBECUR_MIN (50000) +#define MT6360_STROBECUR_STEP (12500) +#define MT6360_STROBECUR_MAX (1500000) +#define MT6360_STRBTIMEOUT_MIN (64000) +#define MT6360_STRBTIMEOUT_STEP (32000) +#define MT6360_STRBTIMEOUT_MAX (2432000) + +#define MT6360_MASK_ULTRA_STROBE (0x80) +#define MT6360_SHIFT_ULTRA_STROBE (7) + +#define MT6360_FLEDSUPPORT_FAULTS (LED_FAULT_UNDER_VOLTAGE |\ + LED_FAULT_SHORT_CIRCUIT |\ + LED_FAULT_INPUT_VOLTAGE |\ + LED_FAULT_TIMEOUT) + +struct mt6360_led_platform_data { + u32 rgbon_sync; + u32 fled1_ultraistrb; + u32 fled2_ultraistrb; +}; + +struct breath_element_cfg { + /* base, step in ms */ + unsigned int base; + unsigned int step; + unsigned int maxval; + unsigned int reg_offset; + unsigned int reg_mask; +}; + +struct mt6360_led_classdev { + struct led_classdev cdev; + int index; + struct device_node *np; + unsigned int currsel_reg; + unsigned int currsel_mask; + unsigned int enable_mask; + unsigned int mode_reg; + unsigned int mode_mask; + unsigned int pwmduty_reg; + unsigned int pwmduty_mask; + unsigned int pwmfreq_reg; + unsigned int pwmfreq_mask; + unsigned int breath_regbase; +}; + +struct mt6360_fled_classdev { + struct led_classdev_flash fl_cdev; + int index; + struct v4l2_flash *v4l2_flash; + struct device_node *np; + unsigned int cs_enable_reg; + unsigned int cs_enable_mask; + unsigned int torch_bright_reg; + unsigned int torch_bright_mask; + unsigned int torch_enable_reg; + unsigned int torch_enable_mask; + unsigned int strobe_bright_reg; + unsigned int strobe_bright_mask; + unsigned int strobe_enable_reg; + unsigned int strobe_enable_mask; + unsigned int strobe_external_reg; + unsigned int strobe_external_mask; + u32 faults; +}; + +struct mt6360_led_data { + struct device *dev; + struct mt6360_led_platform_data *pdata; + struct regmap *regmap; + struct mt6360_led_classdev mtled_cdev[MT6360_LED_MAX]; + struct mt6360_fled_classdev mtfled_cdev[MT6360_FLED_MAX]; + unsigned long fl_torch_flags; + unsigned long fl_strobe_flags; +}; + +static const struct mt6360_led_platform_data def_platform_data = { + .rgbon_sync = 0, + .fled1_ultraistrb = 1, + .fled2_ultraistrb = 1, +}; + +static int mt6360_led_brightness_set(struct led_classdev *cdev, + enum led_brightness brightness) +{ + struct mt6360_led_classdev *mtled_cdev = + (struct mt6360_led_classdev *)cdev; + struct mt6360_led_data *mld = dev_get_drvdata(cdev->dev->parent); + int shift, sync_regval = 0, ret; + + /* if isink1 user control, set chrind function to sw mode */ + if (mtled_cdev->index == MT6360_LED_ISINK1) { + ret = regmap_update_bits(mld->regmap, + MT6360_PMU_RGB_EN, MT6360_CHRIND_MASK, 0xff); + if (ret < 0) + dev_err(cdev->dev, "disable chrind func fail\n"); + } + if (brightness == LED_OFF) { + ret = regmap_update_bits(mld->regmap, + MT6360_LEDEN_REG, mtled_cdev->enable_mask, 0); + if (ret < 0) + return ret; + if (mtled_cdev->mode_reg == 0) + goto out_bright_set; + /* if off, force config to cc_mode */ + shift = ffs(mtled_cdev->mode_mask) - 1; + ret = regmap_update_bits(mld->regmap, mtled_cdev->mode_reg, + mtled_cdev->mode_mask, MT6360_LEDMODE_CC << shift); + if (ret < 0) + dev_err(cdev->dev, "config cc mode fail\n"); + goto out_bright_set; + } + shift = ffs(mtled_cdev->currsel_mask) - 1; + brightness -= 1; + ret = regmap_update_bits(mld->regmap, mtled_cdev->currsel_reg, + mtled_cdev->currsel_mask, brightness << shift); + if (ret < 0) + return ret; + if (mld->pdata->rgbon_sync) { + ret = regmap_read(mld->regmap, MT6360_LEDEN_REG, &sync_regval); + if (ret < 0) + goto out_bright_set; + ret = regmap_update_bits(mld->regmap, + MT6360_LEDEN_REG, MT6360_LEDALLEN_MASK, 0); + if (ret < 0) + goto out_bright_set; + sync_regval |= mtled_cdev->enable_mask; + ret = regmap_update_bits(mld->regmap, MT6360_LEDEN_REG, + MT6360_LEDALLEN_MASK, sync_regval); + } else { + ret = regmap_update_bits(mld->regmap, MT6360_LEDEN_REG, + mtled_cdev->enable_mask, 0xff); + } +out_bright_set: + return ret; +} + +static enum led_brightness mt6360_led_brightness_get(struct led_classdev *cdev) +{ + struct mt6360_led_classdev *mtled_cdev = + (struct mt6360_led_classdev *)cdev; + struct mt6360_led_data *mld = dev_get_drvdata(cdev->dev->parent); + unsigned int regval = 0; + int shift = ffs(mtled_cdev->currsel_mask) - 1, ret; + + ret = regmap_read(mld->regmap, MT6360_LEDEN_REG, ®val); + if (ret < 0) { + dev_err(cdev->dev, "%s: get enable fail\n", __func__); + return LED_OFF; + } + if (!(regval & mtled_cdev->enable_mask)) + return LED_OFF; + ret = regmap_read(mld->regmap, mtled_cdev->currsel_reg, ®val); + if (ret < 0) { + dev_err(cdev->dev, "%s: get isink fail\n", __func__); + return LED_OFF; + } + regval &= mtled_cdev->currsel_mask; + regval >>= shift; + return (regval + 1); +} + +static const unsigned int dim_freqs[] = { + 4, 8, 250, 500, 1000, 2000, 4000, 8000, +}; + +static int mt6360_led_blink_set(struct led_classdev *cdev, + unsigned long *delay_on, unsigned long *delay_off) +{ + struct mt6360_led_classdev *mtled_cdev = + (struct mt6360_led_classdev *)cdev; + struct mt6360_led_data *mld = dev_get_drvdata(cdev->dev->parent); + int freq, duty, shift, sum, ret; + + if (mtled_cdev->mode_reg == 0) + return -ENOTSUPP; + if (*delay_on == 0 && *delay_off == 0) + *delay_on = *delay_off = 500; + sum = *delay_on + *delay_off; + for (freq = 0; freq < ARRAY_SIZE(dim_freqs); freq++) { + if (sum <= dim_freqs[freq]) + break; + } + if (freq == ARRAY_SIZE(dim_freqs)) { + dev_err(cdev->dev, "exceed pwm frequency max\n"); + return -EINVAL; + } + /* invert */ + freq = ARRAY_SIZE(dim_freqs) - 1 - freq; + shift = ffs(mtled_cdev->pwmfreq_mask) - 1; + ret = regmap_update_bits(mld->regmap, mtled_cdev->pwmfreq_reg, + mtled_cdev->pwmfreq_mask, freq << shift); + if (ret < 0) { + dev_err(cdev->dev, "Failed to set pwmfreq\n"); + return ret; + } + duty = 255 * (*delay_on) / sum; + shift = ffs(mtled_cdev->pwmduty_mask) - 1; + ret = regmap_update_bits(mld->regmap, mtled_cdev->pwmduty_reg, + mtled_cdev->pwmduty_mask, duty << shift); + if (ret < 0) { + dev_err(cdev->dev, "Failed to set pwmduty\n"); + return ret; + } + shift = ffs(mtled_cdev->mode_mask) - 1; + ret = regmap_update_bits(mld->regmap, mtled_cdev->mode_reg, + mtled_cdev->mode_mask, MT6360_LEDMODE_PWM << shift); + return ret; +} + +#define MT6360_LED_DESC(_id) { \ + .cdev = { \ + .name = "mt6360_isink" #_id, \ + .max_brightness = MT6360_SINKCUR_MAX##_id, \ + .brightness_set_blocking = mt6360_led_brightness_set, \ + .brightness_get = mt6360_led_brightness_get, \ + .blink_set = mt6360_led_blink_set, \ + }, \ + .index = MT6360_LED_ISINK##_id, \ + .currsel_reg = MT6360_CURRSEL_REG##_id, \ + .currsel_mask = MT6360_CURRSEL_MASK##_id, \ + .enable_mask = MT6360_LEDEN_MASK##_id, \ + .mode_reg = MT6360_LEDMODE_REG##_id, \ + .mode_mask = MT6360_LEDMODE_MASK##_id, \ + .pwmduty_reg = MT6360_PWMDUTY_REG##_id, \ + .pwmduty_mask = MT6360_PWMDUTY_MASK##_id, \ + .pwmfreq_reg = MT6360_PWMFREQ_REG##_id, \ + .pwmfreq_mask = MT6360_PWMFREQ_MASK##_id, \ + .breath_regbase = MT6360_BREATH_REGBASE##_id, \ +} + +/* ISINK 1/2/3 for RGBLED, ISINK4 for MoonLight */ +static const struct mt6360_led_classdev def_led_classdev[MT6360_LED_MAX] = { + MT6360_LED_DESC(1), + MT6360_LED_DESC(2), + MT6360_LED_DESC(3), + MT6360_LED_DESC(4), +}; + +static inline bool mt6360_fled_check_flags_if_any(unsigned long *flags) +{ + return (*flags) ? true : false; +} + +static int mt6360_fled_strobe_brightness_set( + struct led_classdev_flash *fled_cdev, u32 brightness) +{ + struct led_classdev *led_cdev = &fled_cdev->led_cdev; + struct mt6360_led_data *mld = dev_get_drvdata(led_cdev->dev->parent); + struct led_flash_setting *fs = &fled_cdev->brightness; + struct mt6360_fled_classdev *mtfled_cdev = (void *)fled_cdev; + int shift; + u32 val; + + val = brightness; + val = (val - fs->min) / fs->step; + shift = ffs(mtfled_cdev->strobe_bright_mask) - 1; + return regmap_update_bits(mld->regmap, mtfled_cdev->strobe_bright_reg, + mtfled_cdev->strobe_bright_mask, val << shift); +} + +static int mt6360_fled_strobe_brightness_get( + struct led_classdev_flash *fled_cdev, u32 *brightness) +{ + struct led_classdev *led_cdev = &fled_cdev->led_cdev; + struct mt6360_led_data *mld = dev_get_drvdata(led_cdev->dev->parent); + struct led_flash_setting *fs = &fled_cdev->brightness; + struct mt6360_fled_classdev *mtfled_cdev = (void *)fled_cdev; + int shift, ret; + u32 regval = 0; + + ret = regmap_read(mld->regmap, mtfled_cdev->strobe_bright_reg, ®val); + if (ret < 0) + return ret; + regval &= mtfled_cdev->strobe_bright_mask; + shift = ffs(mtfled_cdev->strobe_bright_mask) - 1; + regval >>= shift; + /* convert to microamp value */ + *brightness = regval * fs->step + fs->min; + return 0; +} + +static int mt6360_fled_strobe_set( + struct led_classdev_flash *fled_cdev, bool state) +{ + struct led_classdev *led_cdev = &fled_cdev->led_cdev; + struct mt6360_led_data *mld = dev_get_drvdata(led_cdev->dev->parent); + struct mt6360_fled_classdev *mtfled_cdev = (void *)fled_cdev; + int id = mtfled_cdev->index, ret; + + if (!(state ^ test_bit(id, &mld->fl_strobe_flags))) + return 0; + if (mt6360_fled_check_flags_if_any(&mld->fl_torch_flags)) { + dev_err(led_cdev->dev, + "Disable all leds torch [%lu]\n", mld->fl_torch_flags); + return -EINVAL; + } + ret = regmap_update_bits(mld->regmap, mtfled_cdev->cs_enable_reg, + mtfled_cdev->cs_enable_mask, state ? 0xff : 0); + if (ret < 0) { + dev_err(led_cdev->dev, "Fail to set cs enable [%d]\n", state); + goto out_strobe_set; + } + ret = regmap_update_bits(mld->regmap, mtfled_cdev->strobe_enable_reg, + mtfled_cdev->strobe_enable_mask, state ? 0xff : 0); + if (ret < 0) { + dev_err(led_cdev->dev, "Fail to set strb enable [%d]\n", state); + goto out_strobe_set; + } + if (state) { + if (!mt6360_fled_check_flags_if_any(&mld->fl_strobe_flags)) + usleep_range(5000, 6000); + set_bit(id, &mld->fl_strobe_flags); + mtfled_cdev->faults = 0; + } else { + clear_bit(id, &mld->fl_strobe_flags); + if (!mt6360_fled_check_flags_if_any(&mld->fl_strobe_flags)) + usleep_range(400, 500); + } +out_strobe_set: + return ret; +} + +static int mt6360_fled_strobe_get( + struct led_classdev_flash *fled_cdev, bool *state) +{ + struct led_classdev *led_cdev = &fled_cdev->led_cdev; + struct mt6360_led_data *mld = dev_get_drvdata(led_cdev->dev->parent); + struct mt6360_fled_classdev *mtfled_cdev = (void *)fled_cdev; + int id = mtfled_cdev->index; + + *state = test_bit(id, &mld->fl_strobe_flags) ? true : false; + return 0; +} + +static int mt6360_fled_strobe_timeout_set( + struct led_classdev_flash *fled_cdev, u32 timeout) +{ + struct led_classdev *led_cdev = &fled_cdev->led_cdev; + struct mt6360_led_data *mld = dev_get_drvdata(led_cdev->dev->parent); + struct led_flash_setting *ts = &fled_cdev->timeout; + int shift, ret; + u32 regval; + + regval = (timeout - ts->min) / ts->step; + shift = ffs(MT6360_STRBTIMEOUT_MASK) - 1; + ret = regmap_update_bits(mld->regmap, MT6360_STRBTIMEOUT_REG, + MT6360_STRBTIMEOUT_MASK, regval << shift); + return ret; +} + +static int mt6360_fled_strobe_fault_get( + struct led_classdev_flash *fled_cdev, u32 *fault) +{ + struct mt6360_fled_classdev *mtfled_cdev = (void *)fled_cdev; + + *fault = mtfled_cdev->faults; + return 0; +} + +static const struct led_flash_ops mt6360_fled_ops = { + .flash_brightness_set = mt6360_fled_strobe_brightness_set, + .flash_brightness_get = mt6360_fled_strobe_brightness_get, + .strobe_set = mt6360_fled_strobe_set, + .strobe_get = mt6360_fled_strobe_get, + .timeout_set = mt6360_fled_strobe_timeout_set, + .fault_get = mt6360_fled_strobe_fault_get, +}; + +static int mt6360_fled_brightness_set(struct led_classdev *led_cdev, + enum led_brightness brightness) +{ + struct led_classdev_flash *lcf = lcdev_to_flcdev(led_cdev); + struct mt6360_led_data *mld = dev_get_drvdata(led_cdev->dev->parent); + struct mt6360_fled_classdev *mtfled_cdev = (void *)lcf; + int id = mtfled_cdev->index, shift, keep, ret; + + if (mt6360_fled_check_flags_if_any(&mld->fl_strobe_flags)) { + dev_err(led_cdev->dev, + "Disable all leds strobe [%lu]\n", mld->fl_strobe_flags); + return -EINVAL; + } + if (brightness == LED_OFF) { + clear_bit(id, &mld->fl_torch_flags); + keep = mt6360_fled_check_flags_if_any(&mld->fl_torch_flags); + ret = regmap_update_bits(mld->regmap, + mtfled_cdev->torch_enable_reg, + mtfled_cdev->torch_enable_mask, + keep ? 0xff : 0); + if (ret < 0) { + dev_err(led_cdev->dev, "Fail to set torch disable\n"); + goto out_bright_set; + } + ret = regmap_update_bits(mld->regmap, + mtfled_cdev->cs_enable_reg, + mtfled_cdev->cs_enable_mask, 0); + if (ret < 0) + dev_err(led_cdev->dev, "Fail to set torch disable\n"); + goto out_bright_set; + } + shift = ffs(mtfled_cdev->torch_bright_mask) - 1; + brightness -= 1; + ret = regmap_update_bits(mld->regmap, mtfled_cdev->torch_bright_reg, + mtfled_cdev->torch_bright_mask, brightness << shift); + if (ret < 0) { + dev_err(led_cdev->dev, + "Fail to set torch bright [%d]\n", brightness); + goto out_bright_set; + } + ret = regmap_update_bits(mld->regmap, mtfled_cdev->cs_enable_reg, + mtfled_cdev->cs_enable_mask, 0xff); + if (ret < 0) { + dev_err(led_cdev->dev, "Fail to set cs enable\n"); + goto out_bright_set; + } + ret = regmap_update_bits(mld->regmap, mtfled_cdev->torch_enable_reg, + mtfled_cdev->torch_enable_mask, 0xff); + set_bit(id, &mld->fl_torch_flags); +out_bright_set: + return ret; +} + +static enum led_brightness mt6360_fled_brightness_get( + struct led_classdev *led_cdev) +{ + struct led_classdev_flash *lcf = lcdev_to_flcdev(led_cdev); + struct mt6360_led_data *mld = dev_get_drvdata(led_cdev->dev->parent); + struct mt6360_fled_classdev *mtfled_cdev = (void *)lcf; + int id = mtfled_cdev->index, shift, ret; + u32 regval = 0; + + if (!test_bit(id, &mld->fl_torch_flags)) + return LED_OFF; + ret = regmap_read(mld->regmap, mtfled_cdev->torch_bright_reg, ®val); + if (ret < 0) { + dev_err(led_cdev->dev, "%s: Fail to get torb reg\n", __func__); + return LED_OFF; + } + shift = ffs(mtfled_cdev->torch_bright_mask) - 1; + regval &= mtfled_cdev->torch_bright_mask; + regval >>= shift; + return (regval + 1); +} + +#define MT6360_FLED_DESC(_id) { \ + .fl_cdev = { \ + .led_cdev = { \ + .name = "mt6360_fled_ch" #_id, \ + .max_brightness = MT6360_TORBRIGHT_MAX##_id, \ + .brightness_set_blocking = mt6360_fled_brightness_set, \ + .brightness_get = mt6360_fled_brightness_get, \ + .flags = LED_DEV_CAP_FLASH, \ + }, \ + .brightness = { \ + .min = MT6360_STROBECUR_MIN, \ + .step = MT6360_STROBECUR_STEP, \ + .max = MT6360_STROBECUR_MAX, \ + .val = MT6360_STROBECUR_MIN, \ + }, \ + .timeout = { \ + .min = MT6360_STRBTIMEOUT_MIN, \ + .step = MT6360_STRBTIMEOUT_STEP, \ + .max = MT6360_STRBTIMEOUT_MAX, \ + .val = MT6360_STRBTIMEOUT_MIN, \ + }, \ + .ops = &mt6360_fled_ops, \ + }, \ + .index = MT6360_FLED_CH##_id, \ + .cs_enable_reg = MT6360_CSENABLE_REG##_id, \ + .cs_enable_mask = MT6360_CSENABLE_MASK##_id, \ + .torch_bright_reg = MT6360_TORBRIGHT_REG##_id, \ + .torch_bright_mask = MT6360_TORBRIGHT_MASK##_id, \ + .torch_enable_reg = MT6360_TORENABLE_REG##_id, \ + .torch_enable_mask = MT6360_TORENABLE_MASK##_id, \ + .strobe_bright_reg = MT6360_STRBRIGHT_REG##_id, \ + .strobe_bright_mask = MT6360_STRBRIGHT_MASK##_id, \ + .strobe_enable_reg = MT6360_STRBENABLE_REG##_id, \ + .strobe_enable_mask = MT6360_STRBENABLE_MASK##_id, \ +} + +static const struct mt6360_fled_classdev def_fled_classdev[MT6360_FLED_MAX] = { + MT6360_FLED_DESC(1), + MT6360_FLED_DESC(2), +}; + +#if IS_ENABLED(CONFIG_V4L2_FLASH_LED_CLASS) +static int mt6360_fled_external_strobe_set( + struct v4l2_flash *v4l2_flash, bool enable) +{ + struct led_classdev_flash *lcf = v4l2_flash->fled_cdev; + struct led_classdev *led_cdev = &lcf->led_cdev; + struct mt6360_led_data *mld = dev_get_drvdata(led_cdev->dev->parent); + struct mt6360_fled_classdev *mtfled_cdev = (void *)lcf; + int id = mtfled_cdev->index, ret; + + if (!(enable ^ test_bit(id, &mld->fl_strobe_flags))) + return 0; + if (mt6360_fled_check_flags_if_any(&mld->fl_torch_flags)) { + dev_err(led_cdev->dev, + "Disable all leds torch [%lu]\n", mld->fl_torch_flags); + return -EINVAL; + } + ret = regmap_update_bits(mld->regmap, mtfled_cdev->cs_enable_reg, + mtfled_cdev->cs_enable_mask, enable ? 0xff : 0); + if (enable) { + set_bit(id, &mld->fl_strobe_flags); + mtfled_cdev->faults = 0; + } else + clear_bit(id, &mld->fl_strobe_flags); + return ret; +} + +static const struct v4l2_flash_ops v4l2_flash_ops = { + .external_strobe_set = mt6360_fled_external_strobe_set, +}; + +static void mt6360_init_v4l2_flash_config( + struct mt6360_fled_classdev *mtfled_cdev, + struct v4l2_flash_config *config) +{ + struct led_flash_setting *torch_intensity = &config->intensity; + struct led_classdev *led_cdev = &(mtfled_cdev->fl_cdev.led_cdev); + s32 val; + + snprintf(config->dev_name, sizeof(config->dev_name), + "%s", mtfled_cdev->fl_cdev.led_cdev.name); + torch_intensity->min = MT6360_TORCHCUR_MIN; + torch_intensity->step = MT6360_TORCHCUR_STEP; + val = MT6360_TORCHCUR_MIN; + val += ((led_cdev->max_brightness - 1) * MT6360_TORCHCUR_STEP); + torch_intensity->val = torch_intensity->max = val; + config->flash_faults |= MT6360_FLEDSUPPORT_FAULTS; + config->has_external_strobe = 1; +} +#else +static const struct v4l2_flash_ops v4l2_flash_ops; + +static void mt6360_init_v4l2_flash_config( + struct mt6360_fled_classdev *mtfled_cdev, + struct v4l2_flash_config *config) +{ +} +#endif /* IS_ENABLED(CONFIG_V4L2_FLASH_LED_CLASS) */ + +static irqreturn_t mt6360_pmu_fled_lvf_evt_handler(int irq, void *data) +{ + struct mt6360_led_data *mld = data; + + dev_err(mld->dev, "%s\n", __func__); + mld->mtfled_cdev[MT6360_FLED_CH1].faults |= LED_FAULT_UNDER_VOLTAGE; + mld->mtfled_cdev[MT6360_FLED_CH2].faults |= LED_FAULT_UNDER_VOLTAGE; + return IRQ_HANDLED; +} + +static irqreturn_t mt6360_pmu_fled2_short_evt_handler(int irq, void *data) +{ + struct mt6360_led_data *mld = data; + + dev_err(mld->dev, "%s\n", __func__); + mld->mtfled_cdev[MT6360_FLED_CH2].faults |= LED_FAULT_SHORT_CIRCUIT; + return IRQ_HANDLED; +} + +static irqreturn_t mt6360_pmu_fled1_short_evt_handler(int irq, void *data) +{ + struct mt6360_led_data *mld = data; + + dev_err(mld->dev, "%s\n", __func__); + mld->mtfled_cdev[MT6360_FLED_CH1].faults |= LED_FAULT_SHORT_CIRCUIT; + return IRQ_HANDLED; +} + +static irqreturn_t mt6360_pmu_fled2_strb_to_evt_handler(int irq, void *data) +{ + struct mt6360_led_data *mld = data; + + mld->mtfled_cdev[MT6360_FLED_CH2].faults |= LED_FAULT_TIMEOUT; + return IRQ_HANDLED; +} + +static irqreturn_t mt6360_pmu_fled1_strb_to_evt_handler(int irq, void *data) +{ + struct mt6360_led_data *mld = data; + + mld->mtfled_cdev[MT6360_FLED_CH1].faults |= LED_FAULT_TIMEOUT; + return IRQ_HANDLED; +} + +static irqreturn_t mt6360_pmu_fled_chg_vinovp_evt_handler(int irq, void *data) +{ + struct mt6360_led_data *mld = data; + + dev_warn(mld->dev, "%s\n", __func__); + mld->mtfled_cdev[MT6360_FLED_CH1].faults |= LED_FAULT_INPUT_VOLTAGE; + mld->mtfled_cdev[MT6360_FLED_CH2].faults |= LED_FAULT_INPUT_VOLTAGE; + return IRQ_HANDLED; +} + +static struct mt6360_pmu_irq_desc mt6360_pmu_fled_irq_desc[] = { + { "fled_chg_vinovp_evt", mt6360_pmu_fled_chg_vinovp_evt_handler }, + { "fled_lvf_evt", mt6360_pmu_fled_lvf_evt_handler }, + { "fled2_short_evt", mt6360_pmu_fled2_short_evt_handler }, + { "fled1_short_evt", mt6360_pmu_fled1_short_evt_handler }, + { "fled2_strb_to_evt", mt6360_pmu_fled2_strb_to_evt_handler }, + { "fled1_strb_to_evt", mt6360_pmu_fled1_strb_to_evt_handler }, +}; + +static int mt6360_fled_irq_register(struct platform_device *pdev) +{ + struct mt6360_pmu_irq_desc *irq_desc; + int i, irq, ret; + + for (i = 0; i < ARRAY_SIZE(mt6360_pmu_fled_irq_desc); i++) { + irq_desc = mt6360_pmu_fled_irq_desc + i; + if (unlikely(!irq_desc->name)) + continue; + irq = platform_get_irq_byname(pdev, irq_desc->name); + if (irq < 0) + continue; + ret = devm_request_threaded_irq(&pdev->dev, irq, NULL, + irq_desc->irq_handler, + IRQF_TRIGGER_FALLING, + irq_desc->name, + platform_get_drvdata(pdev)); + if (ret < 0) { + dev_err(&pdev->dev, + "request %s irq fail\n", irq_desc->name); + return ret; + } + } + return 0; +} + +static int mt6360_iled_parse_dt(struct device *dev, + struct mt6360_led_data *mld) +{ + struct device_node *iled_np, *child; + struct mt6360_led_classdev *mtled_cdev; + u32 val; + int ret; + + if (!dev->of_node) + return 0; + iled_np = of_find_node_by_name(dev->of_node, "iled"); + if (!iled_np) + return 0; + for_each_available_child_of_node(iled_np, child) { + ret = of_property_read_u32(child, "reg", &val); + if (ret) { + dev_err(dev, "Fail to read reg property\n"); + continue; + } + if (val >= MT6360_LED_MAX) { + dev_err(dev, "Invalid iled reg [%u]\n", val); + ret = -EINVAL; + goto out_iled_dt; + } + mtled_cdev = mld->mtled_cdev + val; + + of_property_read_string(child, + "label", &(mtled_cdev->cdev.name)); + of_property_read_string(child, "linux,default-trigger", + &(mtled_cdev->cdev.default_trigger)); + mtled_cdev->np = child; + } + return 0; +out_iled_dt: + of_node_put(child); + return ret; +} + +static int mt6360_fled_parse_dt(struct device *dev, + struct mt6360_led_data *mld) +{ + struct device_node *fled_np, *child; + struct mt6360_fled_classdev *mtfled_cdev; + struct led_classdev *led_cdev; + struct led_flash_setting *fs; + u32 val; + int ret; + + if (!dev->of_node) + return 0; + fled_np = of_find_node_by_name(dev->of_node, "fled"); + if (!fled_np) + return 0; + for_each_available_child_of_node(fled_np, child) { + ret = of_property_read_u32(child, "reg", &val); + if (ret) { + dev_err(dev, "Fail to read reg property\n"); + continue; + } + if (val >= MT6360_FLED_MAX) { + dev_err(dev, "Invalid fled reg [%u]\n", val); + ret = -EINVAL; + goto out_fled_dt; + } + mtfled_cdev = mld->mtfled_cdev + val; + + of_property_read_string(child, "label", + &(mtfled_cdev->fl_cdev.led_cdev.name)); + ret = of_property_read_u32(child, "led-max-microamp", &val); + if (ret) { + dev_warn(dev, "led-max-microamp property missing\n"); + val = MT6360_TORCHCUR_MIN; + } + if (val < MT6360_TORCHCUR_MIN) + val = MT6360_TORCHCUR_MIN; + val = (val - MT6360_TORCHCUR_MIN) / MT6360_TORCHCUR_STEP + 1; + led_cdev = &(mtfled_cdev->fl_cdev.led_cdev); + led_cdev->max_brightness = min(led_cdev->max_brightness, val); + ret = of_property_read_u32(child, "flash-max-microamp", &val); + if (ret) { + dev_warn(dev, "flash-max-microamp property missing\n"); + val = MT6360_STROBECUR_MIN; + } + if (val < MT6360_STROBECUR_MIN) + val = MT6360_STROBECUR_MIN; + fs = &(mtfled_cdev->fl_cdev.brightness); + fs->val = fs->max = min(fs->max, val); + ret = of_property_read_u32(child, "flash-max-timeout", &val); + if (ret) { + dev_warn(dev, "flash-max-timeout property missing\n"); + val = MT6360_STRBTIMEOUT_MIN; + } + if (val < MT6360_STRBTIMEOUT_MIN) + val = MT6360_STRBTIMEOUT_MIN; + fs = &(mtfled_cdev->fl_cdev.timeout); + fs->val = fs->max = min(fs->max, val); + mtfled_cdev->np = child; + } + return 0; +out_fled_dt: + of_node_put(child); + return ret; +} + +static void mt6360_led_parse_dt_data(struct device *dev, + struct mt6360_led_platform_data *pdata) +{ + struct device_node *np = dev->of_node; + int i, ret; + const struct { + const char *name; + u32 *val_ptr; + } u32_opts[] = { + { "rgbon_sync", &pdata->rgbon_sync }, + { "fled1_ultraistrb", &pdata->fled1_ultraistrb }, + { "fled2_ultraistrb", &pdata->fled2_ultraistrb }, + }; + + memcpy(pdata, &def_platform_data, sizeof(*pdata)); + for (i = 0; i < ARRAY_SIZE(u32_opts); i++) { + ret = of_property_read_u32(np, u32_opts[i].name, + u32_opts[i].val_ptr); + if (ret) + dev_err(dev, "error reading '%s'\n", u32_opts[i].name); + } +} + +static int mt6360_led_apply_pdata(struct mt6360_led_data *mld, + struct mt6360_led_platform_data *pdata) +{ + int i, ret; + const struct { + u32 *val_ptr; + u8 reg; + u8 mask; + u8 shift; + } sel_props[] = { + { + &pdata->fled1_ultraistrb, MT6360_PMU_FLED1_STRB_CTRL2, + MT6360_MASK_ULTRA_STROBE, MT6360_SHIFT_ULTRA_STROBE, + }, + { + &pdata->fled2_ultraistrb, MT6360_PMU_FLED2_STRB_CTRL2, + MT6360_MASK_ULTRA_STROBE, MT6360_SHIFT_ULTRA_STROBE, + }, + }; + + for (i = 0; i < ARRAY_SIZE(sel_props); i++) { + ret = regmap_update_bits(mld->regmap, + sel_props[i].reg, + sel_props[i].mask, + *sel_props[i].val_ptr << + sel_props[i].shift); + if (ret < 0) + return ret; + } + return 0; +} + +static int mt6360_led_probe(struct platform_device *pdev) +{ + struct mt6360_led_platform_data *pdata = dev_get_platdata(&pdev->dev); + struct mt6360_led_data *mld; + struct mt6360_led_classdev *mtled_cdev; + struct mt6360_fled_classdev *mtfled_cdev; + struct v4l2_flash_config v4l2_config; + int i, ret; + + mld = devm_kzalloc(&pdev->dev, sizeof(*mld), GFP_KERNEL); + if (!mld) + return -ENOMEM; + + if (pdev->dev.of_node) { + pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); + if (!pdata) + return -ENOMEM; + mt6360_led_parse_dt_data(&pdev->dev, pdata); + } + + if (!pdata) { + dev_err(&pdev->dev, "no platform data specified\n"); + return -EINVAL; + } + + mld->dev = &pdev->dev; + mld->pdata = pdata; + platform_set_drvdata(pdev, mld); + + mld->regmap = dev_get_regmap(pdev->dev.parent, NULL); + if (!mld->regmap) { + dev_err(&pdev->dev, "Failed to get parent regmap\n"); + return -ENODEV; + } + + ret = mt6360_led_apply_pdata(mld, pdata); + if (ret < 0) { + dev_err(&pdev->dev, "apply pdata fail\n"); + return ret; + } + + memcpy(mld->mtled_cdev, def_led_classdev, sizeof(def_led_classdev)); + ret = mt6360_iled_parse_dt(&pdev->dev, mld); + if (ret < 0) { + dev_err(&pdev->dev, "Failed to parse iled dt\n"); + return ret; + } + + for (i = 0; i < MT6360_LED_MAX; i++) { + mtled_cdev = mld->mtled_cdev + i; + ret = devm_led_classdev_register(&pdev->dev, + &(mtled_cdev->cdev)); + if (ret < 0) { + dev_err(&pdev->dev, "Failed to register led[%d]\n", i); + return ret; + } + mtled_cdev->cdev.dev->of_node = mtled_cdev->np; + } + + memcpy(mld->mtfled_cdev, def_fled_classdev, sizeof(def_fled_classdev)); + ret = mt6360_fled_parse_dt(&pdev->dev, mld); + if (ret < 0) { + dev_err(&pdev->dev, "Fail to parse fled dt\n"); + return ret; + } + + for (i = 0; i < MT6360_FLED_MAX; i++) { + mtfled_cdev = mld->mtfled_cdev + i; + ret = led_classdev_flash_register(&pdev->dev, + &mtfled_cdev->fl_cdev); + if (ret < 0) { + dev_err(&pdev->dev, "Failed to register fled[%d]\n", i); + goto out_fled_cdev; + } + } + + for (i = 0; i < MT6360_FLED_MAX; i++) { + mtfled_cdev = mld->mtfled_cdev + i; + memset(&v4l2_config, 0, sizeof(v4l2_config)); + mt6360_init_v4l2_flash_config(mtfled_cdev, &v4l2_config); + mtfled_cdev->v4l2_flash = v4l2_flash_init(&pdev->dev, + of_fwnode_handle(mtfled_cdev->np), + &mtfled_cdev->fl_cdev, + &v4l2_flash_ops, &v4l2_config); + if (IS_ERR(mtfled_cdev->v4l2_flash)) { + dev_err(&pdev->dev, "Failed to register v4l2_sd\n"); + ret = PTR_ERR(mtfled_cdev->v4l2_flash); + goto out_v4l2_sd; + } + } + + ret = mt6360_fled_irq_register(pdev); + if (ret < 0) { + dev_err(&pdev->dev, "Failed to register irqs\n"); + goto out_v4l2_sd; + } + + return 0; +out_v4l2_sd: + while (--i >= 0) { + mtfled_cdev = mld->mtfled_cdev + i; + v4l2_flash_release(mtfled_cdev->v4l2_flash); + } + i = MT6360_FLED_MAX; +out_fled_cdev: + while (--i >= 0) { + mtfled_cdev = mld->mtfled_cdev + i; + led_classdev_flash_unregister(&mtfled_cdev->fl_cdev); + } + return ret; +} + +static int mt6360_led_remove(struct platform_device *pdev) +{ + struct mt6360_led_data *mld = platform_get_drvdata(pdev); + struct mt6360_fled_classdev *mtfled_cdev; + int i; + + for (i = 0; i < MT6360_FLED_MAX; i++) { + mtfled_cdev = mld->mtfled_cdev + i; + v4l2_flash_release(mtfled_cdev->v4l2_flash); + led_classdev_flash_unregister(&mtfled_cdev->fl_cdev); + } + + return 0; +} + +static const struct of_device_id __maybe_unused mt6360_led_of_id[] = { + { .compatible = "mediatek,mt6360_led", }, + {}, +}; +MODULE_DEVICE_TABLE(of, mt6360_led_of_id); + +static struct platform_driver mt6360_led_driver = { + .driver = { + .name = "mt6360_led", + .owner = THIS_MODULE, + .of_match_table = of_match_ptr(mt6360_led_of_id), + }, + .probe = mt6360_led_probe, + .remove = mt6360_led_remove, +}; +module_platform_driver(mt6360_led_driver); + +MODULE_AUTHOR("Gene Chen "); +MODULE_DESCRIPTION("MT6360 Led Driver"); +MODULE_LICENSE("GPL v2"); diff --git a/include/linux/mfd/mt6360.h b/include/linux/mfd/mt6360.h index ea13040..2b81ab5 100644 --- a/include/linux/mfd/mt6360.h +++ b/include/linux/mfd/mt6360.h @@ -29,6 +29,11 @@ struct mt6360_pmu_data { unsigned int chip_rev; }; +struct mt6360_pmu_irq_desc { + const char *name; + irq_handler_t irq_handler; +}; + /* PMU register defininition */ #define MT6360_PMU_DEV_INFO (0x00) #define MT6360_PMU_CORE_CTRL1 (0x01) @@ -236,5 +241,4 @@ struct mt6360_pmu_data { #define CHIP_VEN_MASK (0xF0) #define CHIP_VEN_MT6360 (0x50) #define CHIP_REV_MASK (0x0F) - #endif /* __MT6360_H__ */