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From 0e7ecb12cdc3e89242738a525c8f6c6419fb976e Mon Sep 17 00:00:00 2001
From: Dmitry Eremin-Solenikov <dmitry_eremin@mentor.com>
Date: Wed, 9 Oct 2013 05:49:57 +0400
Subject: [PATCH 2/7] tosa-bl: correct backlight calculations
To behave like old (Sharp) kernels enable 20mA drain when backlight is
enabled. Accordingly limit max_backlight to 255 (8-bit value).
Rebased for 3.14
Signed-off-by: Dmitry Eremin-Solenikov <dmitry_eremin@mentor.com>
---
drivers/video/backlight/tosa_bl.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/video/backlight/tosa_bl.c b/drivers/video/backlight/tosa_bl.c
index 3ad6765..0caae3a 100644
--- a/drivers/video/backlight/tosa_bl.c
+++ b/drivers/video/backlight/tosa_bl.c
@@ -46,7 +46,7 @@ static void tosa_bl_set_backlight(struct tosa_bl_data *data, int brightness)
i2c_smbus_write_byte_data(data->i2c, DAC_CH2, (u8)(brightness & 0xff));
/* SetBacklightVR */
- gpio_set_value(TOSA_GPIO_BL_C20MA, brightness & 0x100);
+ gpio_set_value(TOSA_GPIO_BL_C20MA, !!brightness);
tosa_bl_enable(spi, brightness);
}
@@ -104,7 +104,7 @@ static int tosa_bl_probe(struct i2c_client *client,
memset(&props, 0, sizeof(struct backlight_properties));
props.type = BACKLIGHT_RAW;
- props.max_brightness = 512 - 1;
+ props.max_brightness = 255;
data->bl = devm_backlight_device_register(&client->dev, "tosa-bl",
&client->dev, data, &bl_ops,
&props);
--
1.8.5.2
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