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mb/google/dedede/var/boten: Add LTE power on/off sequence

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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>
This commit is contained in:
Karthikeyan Ramasubramanian 2020-10-23 16:54:11 -06:00 committed by Patrick Georgi
parent 2313e54bf9
commit 3d4513e7c8
4 changed files with 35 additions and 0 deletions
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2
src/mainboard/google/dedede/variants/boten/Makefile.inc
View file

@ -1,3 +1,5 @@
# SPDX-License-Identifier: GPL-2.0-only
ramstage-y += gpio.c
smm-y += variant.c

5
src/mainboard/google/dedede/variants/boten/gpio.c
View file

@ -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)

5
src/mainboard/google/dedede/variants/boten/overridetree.cb
View file

@ -65,6 +65,11 @@ chip soc/intel/jasperlake
chip drivers/usb/acpi
register "desc" = ""LTE""
register "type" = "UPC_TYPE_INTERNAL"
register "has_power_resource" = "1"
register "reset_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_LOW(GPP_H17)"
register "reset_off_delay_ms" = "10"
register "enable_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPP_A10)"
register "enable_delay_ms" = "20"
device usb 2.3 on end
end
chip drivers/usb/acpi

23
src/mainboard/google/dedede/variants/boten/variant.c Normal file
View file

@ -0,0 +1,23 @@
/* SPDX-License-Identifier: GPL-2.0-or-later */
#include <acpi/acpi.h>
#include <baseboard/variants.h>
#include <delay.h>
#include <gpio.h>
static void power_off_lte_module(void)
{
gpio_output(GPP_H17, 0);
mdelay(10);
gpio_output(GPP_A10, 0);
}
void variant_smi_sleep(u8 slp_typ)
{
/*
* Once the FW_CONFIG is provisioned, power off LTE module only under
* the situation where it is stuffed.
*/
if (slp_typ == ACPI_S5)
power_off_lte_module();
}