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.
Changes in v2:
* Set voltage via constraints as suggested by Mark Brown.
arch/arm/mach-tegra/board-harmony-power.c | 3 ++-
1 files changed, 2 insertions(+), 1 deletions(-)
diff --git a/arch/arm/mach-tegra/board-harmony-power.c b/arch/arm/mach-tegra/board-harmony-power.c
index 976edfb0..82f32300 100644
--- a/arch/arm/mach-tegra/board-harmony-power.c
+++ b/arch/arm/mach-tegra/board-harmony-power.c
@@ -31,13 +31,14 @@ static struct regulator_consumer_supply tps658621_ldo0_supply[] = {
static struct regulator_init_data ldo0_data = {
.constraints = {
- .min_uV = 1250 * 1000,
+ .min_uV = 3300 * 1000,
.max_uV = 3300 * 1000,
.valid_modes_mask = (REGULATOR_MODE_NORMAL |
REGULATOR_MODE_STANDBY),
.valid_ops_mask = (REGULATOR_CHANGE_MODE |
REGULATOR_CHANGE_STATUS |
REGULATOR_CHANGE_VOLTAGE),
+ .apply_uV = 1,
},
.num_consumer_supplies = ARRAY_SIZE(tps658621_ldo0_supply),
.consumer_supplies = tps658621_ldo0_supply,
--
1.7.9.1
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