diff options
| author | Robby Cai <robby.cai@nxp.com> | 2016-01-07 18:19:34 +0800 |
|---|---|---|
| committer | Octavian Purdila <octavian.purdila@nxp.com> | 2017-02-23 14:21:42 +0200 |
| commit | 2c660cd387b06fb1bb18bbfcd35a5963981962e5 (patch) | |
| tree | 16f32528b183c8548729c926d82424ac8309bc02 | |
| parent | 3119ce5c601f7c7fee7dbbe7c2f2255497302f14 (diff) | |
MLK-12144 epdc: fix gpio active level to enable epdc signal
There's a GPIO pin to enable epdc signals on some platform like i.MX7D SDB.
However, it's changed from active-low to active-high on i.MX7D SDB RevB board.
Enhance the driver to handle the active level automatically,
then only need to adjust gpio as well as active level in dts file if necessary.
Signed-off-by: Robby Cai <robby.cai@nxp.com>
| -rw-r--r-- | drivers/video/fbdev/mxc/mxc_epdc_v2_fb.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/video/fbdev/mxc/mxc_epdc_v2_fb.c b/drivers/video/fbdev/mxc/mxc_epdc_v2_fb.c index 4a1a474e11ce..2f784f012517 100644 --- a/drivers/video/fbdev/mxc/mxc_epdc_v2_fb.c +++ b/drivers/video/fbdev/mxc/mxc_epdc_v2_fb.c @@ -4920,6 +4920,7 @@ static int mxc_epdc_fb_probe(struct platform_device *pdev) phandle phandle; u32 out_val[3]; int enable_gpio; + enum of_gpio_flags flag; if (!np) return -EINVAL; @@ -4958,7 +4959,7 @@ static int mxc_epdc_fb_probe(struct platform_device *pdev) } if (of_find_property(np, "en-gpios", NULL)) { - enable_gpio = of_get_named_gpio(np, "en-gpios", 0); + enable_gpio = of_get_named_gpio_flags(np, "en-gpios", 0, &flag); if (enable_gpio == -EPROBE_DEFER) { dev_info(&pdev->dev, "GPIO requested is not" "here yet, deferring the probe\n"); @@ -4970,7 +4971,9 @@ static int mxc_epdc_fb_probe(struct platform_device *pdev) ret = devm_gpio_request_one(&pdev->dev, enable_gpio, - GPIOF_OUT_INIT_LOW, + (flag & OF_GPIO_ACTIVE_LOW) + ? GPIOF_OUT_INIT_LOW : + GPIOF_OUT_INIT_HIGH, "en_pins"); if (ret) { dev_err(&pdev->dev, "failed to request gpio" |