diff options
| author | Bastian Stender <bst@pengutronix.de> | 2017-07-24 16:12:01 +0200 |
|---|---|---|
| committer | Lucas Stach <l.stach@pengutronix.de> | 2017-07-30 16:11:35 +0200 |
| commit | bf8f62d3343388190eb55e4e531cca2b62c946d2 (patch) | |
| tree | f7408a3f7adcb0636679aae6c555ab6c1562f827 /drivers/video/ssd1307fb.c | |
| parent | 881dda908336c0d277b0c8ed05426228ebad70e8 (diff) | |
| download | barebox-bf8f62d3343388190eb55e4e531cca2b62c946d2.tar.gz barebox-bf8f62d3343388190eb55e4e531cca2b62c946d2.tar.xz | |
video/ssd1307fb: add support for VBAT
Adds support to the driver to enable VBAT regulator at init time.
This is similar to ba14301e0356 ("fbdev/ssd1307fb: add support to enable
VBAT") and cfc5b2b551d8 ("fbdev/ssd1307fb: fix optional VBAT support")
in Linux kernel.
Signed-off-by: Bastian Stender <bst@pengutronix.de>
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Diffstat (limited to 'drivers/video/ssd1307fb.c')
| -rw-r--r-- | drivers/video/ssd1307fb.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/drivers/video/ssd1307fb.c b/drivers/video/ssd1307fb.c index 7437d340ee..54e02e7220 100644 --- a/drivers/video/ssd1307fb.c +++ b/drivers/video/ssd1307fb.c @@ -24,6 +24,7 @@ #include <of_device.h> #include <gpio.h> #include <of_gpio.h> +#include <regulator.h> #define SSD1307FB_DATA 0x40 #define SSD1307FB_COMMAND 0x80 @@ -70,6 +71,7 @@ struct ssd1307fb_par { u32 prechargep1; u32 prechargep2; int reset; + struct regulator *vbat; u32 seg_remap; u32 vcomh; u32 width; @@ -422,6 +424,12 @@ static int ssd1307fb_probe(struct device_d *dev) goto fb_alloc_error; } + par->vbat = regulator_get(&client->dev, "vbat-supply"); + if (IS_ERR(par->vbat)) { + dev_info(&client->dev, "Will not use VBAT"); + par->vbat = NULL; + } + ret = of_property_read_u32(node, "solomon,width", &par->width); if (ret) { dev_err(&client->dev, @@ -505,11 +513,26 @@ static int ssd1307fb_probe(struct device_d *dev) goto reset_oled_error; } + if (par->vbat) { + ret = regulator_disable(par->vbat); + if (ret < 0) + goto reset_oled_error; + } + i2c_set_clientdata(client, info); /* Reset the screen */ gpio_set_value(par->reset, 0); udelay(4); + + if (par->vbat) { + ret = regulator_enable(par->vbat); + if (ret < 0) + goto reset_oled_error; + } + + mdelay(100); + gpio_set_value(par->reset, 1); udelay(4); @@ -548,6 +571,7 @@ static int ssd1307fb_probe(struct device_d *dev) panel_init_error: reset_oled_error: fb_alloc_error: + regulator_disable(par->vbat); free(info); return ret; } |