diff options
| author | Jason Liu <r64343@freescale.com> | 2013-05-23 16:59:42 +0800 |
|---|---|---|
| committer | Jason Liu <r64343@freescale.com> | 2013-05-24 09:28:12 +0800 |
| commit | 4bd0032c0eba50fa0caf43f50f735a3cfbe36a8d (patch) | |
| tree | 9e8bcb2c3c6c0117d0d0af6a7859037e56917e5b /arch | |
| parent | 6f04955aa81e688087ed6cf73802f8acfe065fe5 (diff) | |
| download | u-boot-imx-4bd0032c0eba50fa0caf43f50f735a3cfbe36a8d.zip u-boot-imx-4bd0032c0eba50fa0caf43f50f735a3cfbe36a8d.tar.gz u-boot-imx-4bd0032c0eba50fa0caf43f50f735a3cfbe36a8d.tar.bz2 | |
ENGR00264076-5 i.mx6:shutdown vddpu and pcie phy to save power
shutdown vddpu and pcie phy to save power
Signed-off-by: Anson Huang <b20788@freescale.com>
Signed-off-by: Jason Liu <r64343@freescale.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/cpu/armv7/mx6/soc.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/arch/arm/cpu/armv7/mx6/soc.c b/arch/arm/cpu/armv7/mx6/soc.c index 2e84d89..7409df8 100644 --- a/arch/arm/cpu/armv7/mx6/soc.c +++ b/arch/arm/cpu/armv7/mx6/soc.c @@ -325,6 +325,34 @@ static void imx_reset_pfd(void) #endif } +static void imx_set_vddpu_power_down(void) +{ + struct anatop_regs *anatop = (struct anatop_regs *)ANATOP_BASE_ADDR; + u32 val; + + /* need to power down xPU in GPC before turn off PU LDO */ + val = readl(GPC_BASE_ADDR + 0x260); + writel(val | 0x1, GPC_BASE_ADDR + 0x260); + + val = readl(GPC_BASE_ADDR + 0x0); + writel(val | 0x1, GPC_BASE_ADDR + 0x0); + while (readl(GPC_BASE_ADDR + 0x0) & 0x1) + ; + + /* disable VDDPU */ + val = 0x3e00; + writel(val, &anatop->reg_core_clr); +} + +static void imx_set_pcie_phy_power_down(void) +{ + u32 val; + + val = readl(IOMUXC_BASE_ADDR + 0x4); + val |= 0x1 << 18; + writel(val, IOMUXC_BASE_ADDR + 0x4); +} + int arch_cpu_init(void) { init_aips(); @@ -333,6 +361,8 @@ int arch_cpu_init(void) imx_set_wdog_powerdown(false); /* Disable PDE bit of WMCR register */ imx_reset_pfd(); + imx_set_pcie_phy_power_down(); + imx_set_vddpu_power_down(); #ifdef CONFIG_APBH_DMA /* Start APBH DMA */ |