The PCIe reference clock needs a 3.3V supply voltage to work properly. Signed-off-by: Thierry Reding <thierry.reding@xxxxxxxxxxxxxxxxx> --- This patch is based on next-20120217. Note that PCIe works without this patch when the Linux kernel is booted with a combination of QuickBoot and U-Boot because either apparently sets LD0 to 3.3V. This is not the case when booting from mainline U-Boot, so it must be set explicitly. arch/arm/mach-tegra/board-harmony-pcie.c | 5 +++++ 1 files changed, 5 insertions(+), 0 deletions(-) diff --git a/arch/arm/mach-tegra/board-harmony-pcie.c b/arch/arm/mach-tegra/board-harmony-pcie.c index 33c4fed..d521cf4 100644 --- a/arch/arm/mach-tegra/board-harmony-pcie.c +++ b/arch/arm/mach-tegra/board-harmony-pcie.c @@ -45,6 +45,10 @@ static int __init harmony_pcie_init(void) if (IS_ERR_OR_NULL(regulator)) goto err_reg; + err = regulator_set_voltage(regulator, 3300000, 3300000); + if (err < 0) + goto err_put; + regulator_enable(regulator); err = tegra_pcie_init(true, true); @@ -55,6 +59,7 @@ static int __init harmony_pcie_init(void) err_pcie: regulator_disable(regulator); +err_put: regulator_put(regulator); err_reg: gpio_free(TEGRA_GPIO_EN_VDD_1V05_GPIO); -- 1.7.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-tegra" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
