diff options
| author | Vadim Bendebury <vbendeb@chromium.org> | 2014-09-08 14:34:09 -0700 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2015-03-28 08:48:20 +0100 |
| commit | c7bbc04544f60d5be44ea4c61899169406066a33 (patch) | |
| tree | fc076a21604bdc55c8d44c92b2b9509c33506c1e /src | |
| parent | 2786ce0b485f39dd5c9fa0fc037fe214adb771e5 (diff) | |
storm: deassert SW_RESET signal at startup
The proto0.2 hardware connects gpio26 (sw reset) to the ethernet
switch reset pit. The output stays low (or high-z) after power up,
which holds the switch in reset. Deassert the signal at startup on
hardware rev 1 and later.
BUG=chrome-os-partner:31780
TEST=with this patch applied, when proto0.2 boots, the ethernet
switch's LED blink once, as was the case with proto0.
Change-Id: I4c5a0cc499563a33aa7d29be7767d0ec5d93c20f
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: 6788962172c6e29e193fa3e85ca79cb83a96e154
Original-Change-Id: I81b3dccb1d1d43c5c1e6dcb5400af8eed6dee870
Original-Signed-off-by: Vadim Bendebury <vbendeb@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/217087
Original-Reviewed-by: David Hendricks <dhendrix@chromium.org>
Reviewed-on: http://review.coreboot.org/9120
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Diffstat (limited to 'src')
| -rw-r--r-- | src/mainboard/google/storm/mainboard.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/src/mainboard/google/storm/mainboard.c b/src/mainboard/google/storm/mainboard.c index ded423aa9f..ebe284911d 100644 --- a/src/mainboard/google/storm/mainboard.c +++ b/src/mainboard/google/storm/mainboard.c @@ -91,10 +91,24 @@ static void setup_tpm(void) gpio_set_out_value(TPM_RESET_GPIO, 1); } +#define SW_RESET_GPIO 26 +static void deassert_sw_reset(void) +{ + if (board_id() == 0) + return; + + /* only proto0.2 and later care about this. */ + gpio_tlmm_config_set(SW_RESET_GPIO, FUNC_SEL_GPIO, + GPIO_PULL_UP, GPIO_4MA, GPIO_ENABLE); + + gpio_set_out_value(SW_RESET_GPIO, 1); +} + static void mainboard_init(device_t dev) { setup_mmu(); setup_usb(); + deassert_sw_reset(); setup_tpm(); } |