On 01/18/2016 12:16 PM, Tom Warren wrote:
Stephen Warren wrotea tMonday, January 18, 2016 11:23 AM:
The PMIC is configured such that its GPIOs have the correct configuration at
power-up, so no programming is required.
In fact, the current programming is actively wrong, since:
(a) the AS3722 driver configures the GPIO to be an output before setting its
output value, which causes a 0v glitch on the output.
(b) the AS3722 driver configures the GPIO to drive a high voltage from its
VSUP_GPIO power source rather than its VDD_GPIO_LV power source, so the
pin drives 5V not 1.8V as desired.
Solve these problems by removing the code which configures the PMIC GPIOs.
Note that this patch was tested directly on top of v2016.01; since then, commit
96350f729c42 "dm: tegra: net: Convert tegra boards to driver model for
Ethernet" prevents PCIe from being initialized. Alternatively, simply revert
that
commit to get PCIe Ethernet working again, then apply this patch to test.
Acked-by: Tom Warren <twar...@nvidia.com>
I'll apply this to u-boot-tegra/next ASAP.
I don't see this patch there yet. It'd be good to get it pulled upstream
ASAP since the merge window for v2016.03 closes this weekend.
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