mirror of https://gitee.com/openkylin/linux.git
- Fix-ups
- Take heed of GPIO default-on requests; gpio_backlight - Enable DT probing; tps65217_bl - Bug Fixes - Free resources in error path; pwm_bl - Fix uninitialised variable warning; adp8860_bl, adp8870_bl - Protect unconditional DT look-ups from non-DT platforms; pwm_bl - Fix backlight flicker; pwm_bl -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIcBAABAgAGBQJWl21vAAoJEFGvii+H/Hdhke8QAJwYZLvGKSLyWzIKdYV5hSpU 5g/ulX+287oT3HWJ8Jlv6ljko+e3EFTkQB5x0po4YlZKBBiymdrYDdb445zA4K3d HBdHH141U4q4GYTs5r34PTdE2xkj/6CS9Ml4NyqzaRMVE0J60a3qrRxn2+naILBo tq4UmGwq5CJvpOzbkf40AG1/uSMwCrpmNZJMVXLk0JIBWPUzIjD2tvtDOyBsIAPk yccdl7t0YQDCW3XwDbZNlhakx2bIom1Qf00kLOEnpbZsCwzfM0v2HSesEf7o1eke BF9H4oDKp/JUTTawsu369dWsVgjwwfAQXYoYGHqX5CvcNJ9QTm5X/DJQQU19GDEi vh5LR5GlNZKG4u0b1ZTYLIlMwYQmKAJtqUgGcyduuxeQQZ0OrIK97n0XvRlfl0tr dZqO6rNWP6vdELNsy9n6ibJUDmWuBTIRuNG+lYp/eoHCq48ObGJwTZCXWbJJeTOT 8TDuUjSelwCtA+dPQbtuujBKb9l4n3O+RENzYDmEIV0do5WUS3fUSHo8HwDLMB2e Jg1P19ou1QumSmi0I4GZWFetqsf87no6Fbb5aoMiKkp1oaY347OZWgmYhP/AUNqo 1w4mWQEBjDp7r81VwpVyPl0/yhA8e7i05fHG+jJ4z0iamaiWabY6+zHUsnYTeaHN SK2h+JksCwK2BagFkYvJ =a/gc -----END PGP SIGNATURE----- Merge tag 'backlight-for-linus-4.5' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/backlight Pull backlight updates from Lee Jones: Fix-ups: - Take heed of GPIO default-on requests; gpio_backlight - Enable DT probing; tps65217_bl Bug Fixes: - Free resources in error path; pwm_bl - Fix uninitialised variable warning; adp8860_bl, adp8870_bl - Protect unconditional DT look-ups from non-DT platforms; pwm_bl - Fix backlight flicker; pwm_bl * tag 'backlight-for-linus-4.5' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/backlight: backlight: pwm_bl: Free PWM requested by legacy API on error path backlight: adp8860: Fix another uninitialized variable use backlight: gpio-backlight: Use default-on on GPIO request backlight: pwm_bl: Fix broken PWM backlight for non-dt platforms backlight: tps65217_bl: Add MODULE_DEVICE_TABLE backlight: pwm_bl: Avoid backlight flicker when probed from DT backlight: adp88x0: Fix uninitialized variable use
This commit is contained in:
commit
b14bf630be
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@ -566,11 +566,13 @@ static ssize_t adp8860_bl_ambient_light_level_show(struct device *dev,
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mutex_lock(&data->lock);
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error = adp8860_read(data->client, ADP8860_PH1LEVL, ®_val);
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ret_val = reg_val;
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error |= adp8860_read(data->client, ADP8860_PH1LEVH, ®_val);
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if (!error) {
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ret_val = reg_val;
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error = adp8860_read(data->client, ADP8860_PH1LEVH, ®_val);
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}
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mutex_unlock(&data->lock);
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if (error < 0)
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if (error)
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return error;
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/* Return 13-bit conversion value for the first light sensor */
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@ -621,10 +623,12 @@ static ssize_t adp8860_bl_ambient_light_zone_store(struct device *dev,
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/* Set user supplied ambient light zone */
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mutex_lock(&data->lock);
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adp8860_read(data->client, ADP8860_CFGR, ®_val);
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reg_val &= ~(CFGR_BLV_MASK << CFGR_BLV_SHIFT);
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reg_val |= (val - 1) << CFGR_BLV_SHIFT;
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adp8860_write(data->client, ADP8860_CFGR, reg_val);
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ret = adp8860_read(data->client, ADP8860_CFGR, ®_val);
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if (!ret) {
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reg_val &= ~(CFGR_BLV_MASK << CFGR_BLV_SHIFT);
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reg_val |= (val - 1) << CFGR_BLV_SHIFT;
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adp8860_write(data->client, ADP8860_CFGR, reg_val);
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}
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mutex_unlock(&data->lock);
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}
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@ -807,10 +807,12 @@ static ssize_t adp8870_bl_ambient_light_zone_store(struct device *dev,
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/* Set user supplied ambient light zone */
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mutex_lock(&data->lock);
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adp8870_read(data->client, ADP8870_CFGR, ®_val);
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reg_val &= ~(CFGR_BLV_MASK << CFGR_BLV_SHIFT);
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reg_val |= (val - 1) << CFGR_BLV_SHIFT;
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adp8870_write(data->client, ADP8870_CFGR, reg_val);
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ret = adp8870_read(data->client, ADP8870_CFGR, ®_val);
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if (!ret) {
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reg_val &= ~(CFGR_BLV_MASK << CFGR_BLV_SHIFT);
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reg_val |= (val - 1) << CFGR_BLV_SHIFT;
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adp8870_write(data->client, ADP8870_CFGR, reg_val);
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}
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mutex_unlock(&data->lock);
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}
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@ -89,6 +89,7 @@ static int gpio_backlight_probe(struct platform_device *pdev)
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struct backlight_device *bl;
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struct gpio_backlight *gbl;
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struct device_node *np = pdev->dev.of_node;
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unsigned long flags = GPIOF_DIR_OUT;
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int ret;
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if (!pdata && !np) {
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@ -114,9 +115,12 @@ static int gpio_backlight_probe(struct platform_device *pdev)
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gbl->def_value = pdata->def_value;
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}
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ret = devm_gpio_request_one(gbl->dev, gbl->gpio, GPIOF_DIR_OUT |
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(gbl->active ? GPIOF_INIT_LOW
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: GPIOF_INIT_HIGH),
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if (gbl->active)
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flags |= gbl->def_value ? GPIOF_INIT_HIGH : GPIOF_INIT_LOW;
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else
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flags |= gbl->def_value ? GPIOF_INIT_LOW : GPIOF_INIT_HIGH;
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ret = devm_gpio_request_one(gbl->dev, gbl->gpio, flags,
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pdata ? pdata->name : "backlight");
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if (ret < 0) {
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dev_err(&pdev->dev, "unable to request GPIO\n");
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@ -198,7 +198,9 @@ static int pwm_backlight_probe(struct platform_device *pdev)
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struct platform_pwm_backlight_data defdata;
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struct backlight_properties props;
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struct backlight_device *bl;
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struct device_node *node = pdev->dev.of_node;
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struct pwm_bl_data *pb;
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int initial_blank = FB_BLANK_UNBLANK;
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int ret;
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if (!data) {
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@ -242,7 +244,7 @@ static int pwm_backlight_probe(struct platform_device *pdev)
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pb->enabled = false;
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pb->enable_gpio = devm_gpiod_get_optional(&pdev->dev, "enable",
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GPIOD_OUT_HIGH);
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GPIOD_ASIS);
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if (IS_ERR(pb->enable_gpio)) {
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ret = PTR_ERR(pb->enable_gpio);
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goto err_alloc;
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@ -264,15 +266,32 @@ static int pwm_backlight_probe(struct platform_device *pdev)
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pb->enable_gpio = gpio_to_desc(data->enable_gpio);
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}
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if (pb->enable_gpio) {
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/*
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* If the driver is probed from the device tree and there is a
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* phandle link pointing to the backlight node, it is safe to
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* assume that another driver will enable the backlight at the
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* appropriate time. Therefore, if it is disabled, keep it so.
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*/
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if (node && node->phandle &&
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gpiod_get_direction(pb->enable_gpio) == GPIOF_DIR_OUT &&
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gpiod_get_value(pb->enable_gpio) == 0)
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initial_blank = FB_BLANK_POWERDOWN;
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else
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gpiod_direction_output(pb->enable_gpio, 1);
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}
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pb->power_supply = devm_regulator_get(&pdev->dev, "power");
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if (IS_ERR(pb->power_supply)) {
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ret = PTR_ERR(pb->power_supply);
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goto err_alloc;
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}
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if (node && node->phandle && !regulator_is_enabled(pb->power_supply))
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initial_blank = FB_BLANK_POWERDOWN;
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pb->pwm = devm_pwm_get(&pdev->dev, NULL);
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if (IS_ERR(pb->pwm) && PTR_ERR(pb->pwm) != -EPROBE_DEFER
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&& !pdev->dev.of_node) {
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if (IS_ERR(pb->pwm) && PTR_ERR(pb->pwm) != -EPROBE_DEFER && !node) {
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dev_err(&pdev->dev, "unable to request PWM, trying legacy API\n");
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pb->legacy = true;
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pb->pwm = pwm_request(data->pwm_id, "pwm-backlight");
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if (IS_ERR(bl)) {
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dev_err(&pdev->dev, "failed to register backlight\n");
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ret = PTR_ERR(bl);
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if (pb->legacy)
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pwm_free(pb->pwm);
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goto err_alloc;
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}
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}
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bl->props.brightness = data->dft_brightness;
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bl->props.power = initial_blank;
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backlight_update_status(bl);
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platform_set_drvdata(pdev, bl);
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@ -320,10 +320,19 @@ static int tps65217_bl_probe(struct platform_device *pdev)
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return 0;
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}
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#ifdef CONFIG_OF
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static const struct of_device_id tps65217_bl_of_match[] = {
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{ .compatible = "ti,tps65217-bl", },
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{ /* sentinel */ },
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};
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MODULE_DEVICE_TABLE(of, tps65217_bl_of_match);
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#endif
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static struct platform_driver tps65217_bl_driver = {
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.probe = tps65217_bl_probe,
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.driver = {
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.name = "tps65217-bl",
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.of_match_table = of_match_ptr(tps65217_bl_of_match),
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},
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};
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