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| author | Matus Ujhelyi <ujhelyi.m@gmail.com> | 2013-04-29 23:18:08 (GMT) |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-04-30 01:28:19 (GMT) |
| commit | 4d22f8c306233433bdf9298b2e7806e9c71674bc (patch) | |
| tree | 49b3a37f0cb85d98936d4e02b66e85f27f50c158 | |
| parent | 17e45db62a4683a7318294d652895dfad575da41 (diff) | |
| download | linux-4d22f8c306233433bdf9298b2e7806e9c71674bc.tar.xz | |
drivers/video/backlight/tps65217_bl.c add default brightness value option
Signed-off-by: Matus Ujhelyi <matus.ujhelyi@streamunlimited.com>
Cc: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | Documentation/devicetree/bindings/video/backlight/tps65217-backlight.txt | 3 | ||||
| -rw-r--r-- | drivers/video/backlight/tps65217_bl.c | 15 | ||||
| -rw-r--r-- | include/linux/mfd/tps65217.h | 1 |
3 files changed, 18 insertions, 1 deletions
diff --git a/Documentation/devicetree/bindings/video/backlight/tps65217-backlight.txt b/Documentation/devicetree/bindings/video/backlight/tps65217-backlight.txt index 7648524..5fb9279 100644 --- a/Documentation/devicetree/bindings/video/backlight/tps65217-backlight.txt +++ b/Documentation/devicetree/bindings/video/backlight/tps65217-backlight.txt @@ -9,6 +9,7 @@ Required properties: - backlight: node for specifying WLED1 and WLED2 lines in TPS65217 - isel: selection bit, valid values: 1 for ISEL1 (low-level) and 2 for ISEL2 (high-level) - fdim: PWM dimming frequency, valid values: 100, 200, 500, 1000 +- default-brightness: valid values: 0-100 Each regulator is defined using the standard binding for regulators. @@ -20,5 +21,7 @@ Example: backlight { isel = <1>; /* 1 - ISET1, 2 ISET2 */ fdim = <100>; /* TPS65217_BL_FDIM_100HZ */ + default-brightness = <50>; }; }; + diff --git a/drivers/video/backlight/tps65217_bl.c b/drivers/video/backlight/tps65217_bl.c index 7088163..0578231 100644 --- a/drivers/video/backlight/tps65217_bl.c +++ b/drivers/video/backlight/tps65217_bl.c @@ -245,6 +245,18 @@ tps65217_bl_parse_dt(struct platform_device *pdev) } } + if (!of_property_read_u32(node, "default-brightness", &val)) { + if (val < 0 || + val > 100) { + dev_err(&pdev->dev, + "invalid 'default-brightness' value in the device tree\n"); + err = ERR_PTR(-EINVAL); + goto err; + } + + pdata->dft_brightness = val; + } + of_node_put(node); return pdata; @@ -311,7 +323,8 @@ static int tps65217_bl_probe(struct platform_device *pdev) return PTR_ERR(tps65217_bl->bl); } - tps65217_bl->bl->props.brightness = 0; + tps65217_bl->bl->props.brightness = pdata->dft_brightness; + backlight_update_status(tps65217_bl->bl); platform_set_drvdata(pdev, tps65217_bl); return 0; diff --git a/include/linux/mfd/tps65217.h b/include/linux/mfd/tps65217.h index 290762f..29eab2b 100644 --- a/include/linux/mfd/tps65217.h +++ b/include/linux/mfd/tps65217.h @@ -228,6 +228,7 @@ enum tps65217_bl_fdim { struct tps65217_bl_pdata { enum tps65217_bl_isel isel; enum tps65217_bl_fdim fdim; + int dft_brightness; }; /** |