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rk3188 lcdc:add support for 1.8V io

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This commit is contained in:
yxj
2013-01-31 17:43:25 +08:00
parent 4f3e4efb38
commit 9437116749
2 changed files with 36 additions and 0 deletions
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14
drivers/video/rockchip/lcdc/Kconfig
View File

@@ -54,9 +54,23 @@ config LCDC0_RK3188
depends on LCDC_RK3188
help
Support rk3188 lcdc0 if you say y here
config LCDC0_IO_18V
bool "lcdc0 1.8v io support"
depends on LCDC0_RK3188
default n
help
LCDC0 io voltage is 1.8V if you say y here,the default voltage is 3.3V
config LCDC1_RK3188
bool "lcdc1 support"
depends on LCDC_RK3188
help
Support rk3188 lcdc1 if you say y here
config LCDC1_IO_18V
bool "lcdc1 1.8v io support"
depends on LCDC1_RK3188
default n
help
LCDC1 io voltage is 1.8V if you say y here,the default voltage is 3.3V

22
drivers/video/rockchip/lcdc/rk3188_lcdc.c
View File

@@ -264,8 +264,30 @@ static int rk3188_lcdc_init(struct rk_lcdc_device_driver *dev_drv)
rk3188_lcdc_clk_enable(lcdc_dev);
if(lcdc_dev->id == 0)
{
v = readl_relaxed(RK30_GRF_BASE + GRF_IO_CON4);
#if defined(CONFIG_LCDC0_IO_18V)
v |= 0xffff4000; //bit14: 1,1.8v;0,3.3v
writel_relaxed(v,RK30_GRF_BASE + GRF_IO_CON4);
#else
v |= 0xffff0000;
v &= 0xffffbfff;
writel_relaxed(v,RK30_GRF_BASE + GRF_IO_CON4);
#endif
}
if(lcdc_dev->id == 1) //iomux for lcdc1
{
v = readl_relaxed(RK30_GRF_BASE + GRF_IO_CON4);
#if defined(CONFIG_LCDC1_IO_18V)
v |= 0xffff8000; //bit14: 1,1.8v;0,3.3v
writel_relaxed(v,RK30_GRF_BASE + GRF_IO_CON4);
#else
v |= 0xffff0000;
v &= 0xffff7fff;
writel_relaxed(v,RK30_GRF_BASE + GRF_IO_CON4);
#endif
iomux_set(LCDC1_DCLK);
iomux_set(LCDC1_DEN);
iomux_set(LCDC1_HSYNC);