^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Backlight driver for Marvell Semiconductor 88PM8606
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 2009 Marvell International Ltd.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Haojian Zhuang <haojian.zhuang@marvell.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/of.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/fb.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/i2c.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/backlight.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/mfd/88pm860x.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #define MAX_BRIGHTNESS (0xFF)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #define MIN_BRIGHTNESS (0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #define CURRENT_BITMASK (0x1F << 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) struct pm860x_backlight_data {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) struct pm860x_chip *chip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) struct i2c_client *i2c;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) int current_brightness;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) int port;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) int pwm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) int iset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) int reg_duty_cycle;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) int reg_always_on;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) int reg_current;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) static int backlight_power_set(struct pm860x_chip *chip, int port,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) int on)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) int ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) switch (port) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) case 0:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) ret = on ? pm8606_osc_enable(chip, WLED1_DUTY) :
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) pm8606_osc_disable(chip, WLED1_DUTY);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) case 1:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) ret = on ? pm8606_osc_enable(chip, WLED2_DUTY) :
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) pm8606_osc_disable(chip, WLED2_DUTY);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) case 2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) ret = on ? pm8606_osc_enable(chip, WLED3_DUTY) :
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) pm8606_osc_disable(chip, WLED3_DUTY);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) static int pm860x_backlight_set(struct backlight_device *bl, int brightness)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) struct pm860x_backlight_data *data = bl_get_data(bl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) struct pm860x_chip *chip = data->chip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) unsigned char value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) if (brightness > MAX_BRIGHTNESS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) value = MAX_BRIGHTNESS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) value = brightness;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) if (brightness)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) backlight_power_set(chip, data->port, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) ret = pm860x_reg_write(data->i2c, data->reg_duty_cycle, value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) if ((data->current_brightness == 0) && brightness) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) if (data->iset) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) ret = pm860x_set_bits(data->i2c, data->reg_current,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) CURRENT_BITMASK, data->iset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) if (data->pwm) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) ret = pm860x_set_bits(data->i2c, PM8606_PWM,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) PM8606_PWM_FREQ_MASK, data->pwm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) if (brightness == MAX_BRIGHTNESS) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) /* set WLED_ON bit as 100% */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) ret = pm860x_set_bits(data->i2c, data->reg_always_on,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) PM8606_WLED_ON, PM8606_WLED_ON);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) if (brightness == MAX_BRIGHTNESS) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) /* set WLED_ON bit as 100% */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) ret = pm860x_set_bits(data->i2c, data->reg_always_on,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) PM8606_WLED_ON, PM8606_WLED_ON);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) /* clear WLED_ON bit since it's not 100% */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) ret = pm860x_set_bits(data->i2c, data->reg_always_on,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) PM8606_WLED_ON, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) if (brightness == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) backlight_power_set(chip, data->port, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) dev_dbg(chip->dev, "set brightness %d\n", value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) data->current_brightness = value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) dev_dbg(chip->dev, "set brightness %d failure with return value: %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) value, ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) static int pm860x_backlight_update_status(struct backlight_device *bl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) return pm860x_backlight_set(bl, backlight_get_brightness(bl));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) static int pm860x_backlight_get_brightness(struct backlight_device *bl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) struct pm860x_backlight_data *data = bl_get_data(bl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) struct pm860x_chip *chip = data->chip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) ret = pm860x_reg_read(data->i2c, data->reg_duty_cycle);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) data->current_brightness = ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) dev_dbg(chip->dev, "get brightness %d\n", data->current_brightness);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) return data->current_brightness;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) static const struct backlight_ops pm860x_backlight_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) .options = BL_CORE_SUSPENDRESUME,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) .update_status = pm860x_backlight_update_status,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) .get_brightness = pm860x_backlight_get_brightness,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) #ifdef CONFIG_OF
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) static int pm860x_backlight_dt_init(struct platform_device *pdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) struct pm860x_backlight_data *data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) char *name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) struct device_node *nproot, *np;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) int iset = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) nproot = of_get_child_by_name(pdev->dev.parent->of_node, "backlights");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) if (!nproot) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) dev_err(&pdev->dev, "failed to find backlights node\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) for_each_child_of_node(nproot, np) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) if (of_node_name_eq(np, name)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) of_property_read_u32(np, "marvell,88pm860x-iset",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) &iset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) data->iset = PM8606_WLED_CURRENT(iset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) of_property_read_u32(np, "marvell,88pm860x-pwm",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) &data->pwm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) of_node_put(np);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) of_node_put(nproot);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) #define pm860x_backlight_dt_init(x, y, z) (-1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) static int pm860x_backlight_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) struct pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) struct pm860x_backlight_pdata *pdata = dev_get_platdata(&pdev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) struct pm860x_backlight_data *data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) struct backlight_device *bl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) struct resource *res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) struct backlight_properties props;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) char name[MFD_NAME_SIZE];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) data = devm_kzalloc(&pdev->dev, sizeof(struct pm860x_backlight_data),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) if (data == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) res = platform_get_resource_byname(pdev, IORESOURCE_REG, "duty cycle");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) if (!res) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) dev_err(&pdev->dev, "No REG resource for duty cycle\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) return -ENXIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) data->reg_duty_cycle = res->start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) res = platform_get_resource_byname(pdev, IORESOURCE_REG, "always on");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) if (!res) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) dev_err(&pdev->dev, "No REG resource for always on\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) return -ENXIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) data->reg_always_on = res->start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) res = platform_get_resource_byname(pdev, IORESOURCE_REG, "current");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) if (!res) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) dev_err(&pdev->dev, "No REG resource for current\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) return -ENXIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) data->reg_current = res->start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) memset(name, 0, MFD_NAME_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) sprintf(name, "backlight-%d", pdev->id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) data->port = pdev->id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) data->chip = chip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) data->i2c = (chip->id == CHIP_PM8606) ? chip->client : chip->companion;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) data->current_brightness = MAX_BRIGHTNESS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) if (pm860x_backlight_dt_init(pdev, data, name)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) if (pdata) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) data->pwm = pdata->pwm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) data->iset = pdata->iset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) memset(&props, 0, sizeof(struct backlight_properties));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) props.type = BACKLIGHT_RAW;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) props.max_brightness = MAX_BRIGHTNESS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) bl = devm_backlight_device_register(&pdev->dev, name, &pdev->dev, data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) &pm860x_backlight_ops, &props);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) if (IS_ERR(bl)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) dev_err(&pdev->dev, "failed to register backlight\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) return PTR_ERR(bl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) bl->props.brightness = MAX_BRIGHTNESS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) platform_set_drvdata(pdev, bl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) /* read current backlight */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) ret = pm860x_backlight_get_brightness(bl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) backlight_update_status(bl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) static struct platform_driver pm860x_backlight_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) .name = "88pm860x-backlight",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) .probe = pm860x_backlight_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) module_platform_driver(pm860x_backlight_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) MODULE_DESCRIPTION("Backlight Driver for Marvell Semiconductor 88PM8606");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang@marvell.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) MODULE_ALIAS("platform:88pm860x-backlight");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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