diff options
| author | Karthikeyan Ramasubramanian <kramasub@google.com> | 2020-10-23 16:54:11 -0600 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2020-11-09 07:37:16 +0000 |
| commit | 3d4513e7c8e27dbb9c6b941c4eb4144d38ff5cee (patch) | |
| tree | 486c32d3fe4680304f373758c7f8fa345feeebe1 /src/mainboard/google/dedede/variants/boten/gpio.c | |
| parent | 2313e54bf91761e61c777a699cf4047a5f4689cc (diff) | |
mb/google/dedede/var/boten: Add LTE power on/off sequence
LTE module used in boten has a specific power on/off sequence.
GPIOs related to power sequnce are:
* GPP_A10 - LTE_PWR_OFF_R_ODL
* GPP_H17 - LTE_RESET_R_ODL
1. Power on: GPP_A10 -> 20ms -> GPP_H17
2. Power off: GPP_H17 -> 10ms -> GPP_A10
3. Warm reset: Power off -> 500ms -> Power on
Configure the GPIOs based on these requirements.
BUG=b:163100335
TEST=Build and boot Boten to OS. Ensure that the LTE module power
sequence requirements are met.
Change-Id: Ic6d5d21ce5267f147b332a4c9b01a29b3b8ccfb8
Signed-off-by: Karthikeyan Ramasubramanian <kramasub@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/44588
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Peichao Wang <pwang12@lenovo.corp-partner.google.com>
Reviewed-by: Marco Chen <marcochen@google.com>
Reviewed-by: Furquan Shaikh <furquan@google.com>
Diffstat (limited to 'src/mainboard/google/dedede/variants/boten/gpio.c')
| -rw-r--r-- | src/mainboard/google/dedede/variants/boten/gpio.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/src/mainboard/google/dedede/variants/boten/gpio.c b/src/mainboard/google/dedede/variants/boten/gpio.c index f889c7fd69..c27daa4854 100644 --- a/src/mainboard/google/dedede/variants/boten/gpio.c +++ b/src/mainboard/google/dedede/variants/boten/gpio.c @@ -7,6 +7,9 @@ /* Pad configuration in ramstage*/ static const struct pad_config gpio_table[] = { + /* A10 : WWAN_EN => LTE_PWR_OFF_ODL */ + PAD_CFG_GPO(GPP_A10, 0, PLTRST), + /* C12 : AP_PEN_DET_ODL */ PAD_CFG_GPI_SCI(GPP_C12, NONE, DEEP, EDGE_SINGLE, NONE), /* C18 : AP_I2C_EMR_SDA */ @@ -38,6 +41,8 @@ static const struct pad_config gpio_table[] = { PAD_NC(GPP_H6, NONE), /* H7 : AP_I2C_CAM_SCL */ PAD_NC(GPP_H7, NONE), + /* H17 : WWAN_RST_L => LTE_RESET_R_ODL */ + PAD_CFG_GPO(GPP_H17, 0, PLTRST), }; const struct pad_config *variant_override_gpio_table(size_t *num) |