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authorStephen Warren <swarren@nvidia.com>2016-01-18 11:23:16 -0700
committerTom Warren <twarren@nvidia.com>2016-01-28 10:32:31 -0700
commit7fb82986be6252acf5aa05ac1ba7225548134a18 (patch)
tree86a747443096f72ac98ff3a8a4da7e21a1b44e85 /board/nvidia/jetson-tk1
parentb20c38a973a51bf3f663bd298c63ad1b8e0de445 (diff)
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ARM: tegra: rm Jetson TK1 PMIC GPIO programming
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. Signed-off-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Tom Warren <twarren@nvidia.com>
Diffstat (limited to 'board/nvidia/jetson-tk1')
-rw-r--r--board/nvidia/jetson-tk1/jetson-tk1.c13
1 files changed, 0 insertions, 13 deletions
diff --git a/board/nvidia/jetson-tk1/jetson-tk1.c b/board/nvidia/jetson-tk1/jetson-tk1.c
index 6f189aa..14f0ce5 100644
--- a/board/nvidia/jetson-tk1/jetson-tk1.c
+++ b/board/nvidia/jetson-tk1/jetson-tk1.c
@@ -57,19 +57,6 @@ int tegra_pcie_board_init(void)
return err;
}
- err = as3722_gpio_configure(pmic, 1, AS3722_GPIO_OUTPUT_VDDH |
- AS3722_GPIO_INVERT);
- if (err < 0) {
- error("failed to configure GPIO#1 as output: %d\n", err);
- return err;
- }
-
- err = as3722_gpio_direction_output(pmic, 2, 1);
- if (err < 0) {
- error("failed to set GPIO#2 high: %d\n", err);
- return err;
- }
-
return 0;
}
#endif /* PCI */