Patrick Georgi has submitted this change. ( https://review.coreboot.org/c/coreboot/+/44588 )
Change subject: mb/google/dedede/var/boten: Add LTE power on/off sequence ......................................................................
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 --- M src/mainboard/google/dedede/variants/boten/Makefile.inc M src/mainboard/google/dedede/variants/boten/gpio.c M src/mainboard/google/dedede/variants/boten/overridetree.cb A src/mainboard/google/dedede/variants/boten/variant.c 4 files changed, 35 insertions(+), 0 deletions(-)
Approvals: build bot (Jenkins): Verified Furquan Shaikh: Looks good to me, approved Marco Chen: Looks good to me, approved Peichao Wang: Looks good to me, approved
diff --git a/src/mainboard/google/dedede/variants/boten/Makefile.inc b/src/mainboard/google/dedede/variants/boten/Makefile.inc index a352709..67a7ab2 100644 --- a/src/mainboard/google/dedede/variants/boten/Makefile.inc +++ b/src/mainboard/google/dedede/variants/boten/Makefile.inc @@ -1,3 +1,5 @@ # SPDX-License-Identifier: GPL-2.0-only
ramstage-y += gpio.c + +smm-y += variant.c diff --git a/src/mainboard/google/dedede/variants/boten/gpio.c b/src/mainboard/google/dedede/variants/boten/gpio.c index f889c7f..c27daa4 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 @@ 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) diff --git a/src/mainboard/google/dedede/variants/boten/overridetree.cb b/src/mainboard/google/dedede/variants/boten/overridetree.cb index 4ec6457..4966aac 100644 --- a/src/mainboard/google/dedede/variants/boten/overridetree.cb +++ b/src/mainboard/google/dedede/variants/boten/overridetree.cb @@ -65,6 +65,11 @@ 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 diff --git a/src/mainboard/google/dedede/variants/boten/variant.c b/src/mainboard/google/dedede/variants/boten/variant.c new file mode 100644 index 0000000..2540fc7 --- /dev/null +++ b/src/mainboard/google/dedede/variants/boten/variant.c @@ -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(); +}