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| author | Anson Huang <b20788@freescale.com> | 2012-01-11 17:18:05 +0800 |
|---|---|---|
| committer | Anson Huang <b20788@freescale.com> | 2012-01-12 11:09:12 +0800 |
| commit | 35056bb16d68df8101ac1a85a82766cc35c32785 (patch) | |
| tree | 9cd85a82b96a5292c143c36fd9534906952e191c /cpu | |
| parent | 8b6086d7e9ca02bb73393c1ea3e991817414b0d8 (diff) | |
| download | u-boot-imx-35056bb16d68df8101ac1a85a82766cc35c32785.zip u-boot-imx-35056bb16d68df8101ac1a85a82766cc35c32785.tar.gz u-boot-imx-35056bb16d68df8101ac1a85a82766cc35c32785.tar.bz2 | |
ENGR00171771 [MX6]Need to power down PCIe by default
PCIe is power on by defaultt, we need to power down
it in u-boot, it can save more than 1mW during suspend.
Signed-off-by: Anson Huang <b20788@freescale.com>
Diffstat (limited to 'cpu')
| -rw-r--r-- | cpu/arm_cortexa8/mx6/generic.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/cpu/arm_cortexa8/mx6/generic.c b/cpu/arm_cortexa8/mx6/generic.c index 73fee40..281368b 100644 --- a/cpu/arm_cortexa8/mx6/generic.c +++ b/cpu/arm_cortexa8/mx6/generic.c @@ -1,5 +1,5 @@ /* - * Copyright (C) 2010-2011 Freescale Semiconductor, Inc. + * Copyright (C) 2010-2012 Freescale Semiconductor, Inc. * * See file CREDITS for list of people who contributed to this * project. @@ -91,6 +91,7 @@ static int cpu_tmp; static unsigned int fuse; #define SNVS_LPGPR_OFFSET 0x68 +#define IOMUXC_GPR1_OFFSET 0x4 static u32 __decode_pll(enum pll_clocks pll, u32 infreq) { @@ -962,6 +963,11 @@ int arch_cpu_init(void) val |= BF_ANADIG_REG_CORE_REG2_TRG(0x14); REG_WR(ANATOP_BASE_ADDR, HW_ANADIG_REG_CORE, val); + /* Need to power down PCIe */ + val = REG_RD(IOMUXC_BASE_ADDR, IOMUXC_GPR1_OFFSET); + val |= (0x1 << 18); + REG_WR(IOMUXC_BASE_ADDR, IOMUXC_GPR1_OFFSET, val); + return 0; } #endif |