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mb/google/brya: Adjust WWAN power sequence 

Follow L850GL spec to adjust power sequence. RST need to drive low
before power on then drive to high.

SPEC:FIBOCOM_L850-GL Hardware User Manual_V1.0.8

BUG=b:186374631
TEST=WWAN is detected by lsusb.

Signed-off-by: Eric Lai <ericr_lai@compal.corp-partner.google.com>
Change-Id: I13357677bb1ab185abf1d4c915a762a9d6894312
Reviewed-on: https://review.coreboot.org/c/coreboot/+/52694
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
This commit is contained in:
Eric Lai 2021-04-27 16:16:39 +08:00 committed by Patrick Georgi
parent 51c4d9fbfd
commit 05877ee1d7
1 changed files with 2 additions and 0 deletions
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2
src/mainboard/google/brya/variants/baseboard/gpio.c
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@ -388,6 +388,8 @@ static const struct pad_config early_gpio_table[] = {
PAD_CFG_GPO(GPP_E0, 0, DEEP),
/* E13 : THC0_SPI1_IO2 ==> MEM_CH_SEL */
PAD_CFG_GPI(GPP_E13, NONE, DEEP),
/* E16 : RSVD_TP ==> WWAN_RST_L */
PAD_CFG_GPO(GPP_E16, 0, DEEP),
/* E15 : RSVD_TP ==> PCH_WP_OD */
PAD_CFG_GPI_GPIO_DRIVER(GPP_E15, NONE, DEEP),
/* H10 : UART0_RXD ==> UART_PCH_RX_DBG_TX */