Patrick Georgi has submitted this change. ( https://review.coreboot.org/c/coreboot/+/48195 )
Change subject: mb/google/dedede/var/metaknight: Add LTE power on/off sequence ......................................................................
mb/google/dedede/var/metaknight: Add LTE power on/off sequence
LTE module used in metaknight has a specific power on/off sequence. GPIOs related to power sequence 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: GPP_A10 keeps high, GPP_H17 goes low at least 2ms Configure the GPIOs based on these requirements.
BUG=b:173671094 TEST=Build and boot Metaknight to OS. Ensure that the LTE module power sequence requirements are met.
Change-Id: Ibff16129dfe2f1de2b1519049244aba4b3123e52 Signed-off-by: Tim Chen tim-chen@quanta.corp-partner.google.com Reviewed-on: https://review.coreboot.org/c/coreboot/+/48195 Tested-by: build bot (Jenkins) no-reply@coreboot.org Reviewed-by: Karthik Ramasubramanian kramasub@google.com --- A src/mainboard/google/dedede/variants/metaknight/Makefile.inc A src/mainboard/google/dedede/variants/metaknight/gpio.c M src/mainboard/google/dedede/variants/metaknight/overridetree.cb A src/mainboard/google/dedede/variants/metaknight/variant.c 4 files changed, 64 insertions(+), 0 deletions(-)
Approvals: build bot (Jenkins): Verified Karthik Ramasubramanian: Looks good to me, approved
diff --git a/src/mainboard/google/dedede/variants/metaknight/Makefile.inc b/src/mainboard/google/dedede/variants/metaknight/Makefile.inc new file mode 100644 index 0000000..67a7ab2 --- /dev/null +++ b/src/mainboard/google/dedede/variants/metaknight/Makefile.inc @@ -0,0 +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/metaknight/gpio.c b/src/mainboard/google/dedede/variants/metaknight/gpio.c new file mode 100644 index 0000000..d6a7fd5 --- /dev/null +++ b/src/mainboard/google/dedede/variants/metaknight/gpio.c @@ -0,0 +1,21 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ + +#include <baseboard/gpio.h> +#include <baseboard/variants.h> +#include <commonlib/helpers.h> +#include <vendorcode/google/chromeos/chromeos.h> + +/* Pad configuration in ramstage*/ +static const struct pad_config gpio_table[] = { + /* A10 : WWAN_EN => LTE_PWR_OFF_ODL */ + PAD_CFG_GPO(GPP_A10, 1, PWROK), + + /* 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) +{ + *num = ARRAY_SIZE(gpio_table); + return gpio_table; +} diff --git a/src/mainboard/google/dedede/variants/metaknight/overridetree.cb b/src/mainboard/google/dedede/variants/metaknight/overridetree.cb index 688ff9b..322f72c 100644 --- a/src/mainboard/google/dedede/variants/metaknight/overridetree.cb +++ b/src/mainboard/google/dedede/variants/metaknight/overridetree.cb @@ -69,6 +69,16 @@ chip drivers/usb/acpi device usb 0.0 on 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 register "desc" = ""User Facing Camera"" register "type" = "UPC_TYPE_INTERNAL" device usb 2.5 on end @@ -78,6 +88,11 @@ register "type" = "UPC_TYPE_INTERNAL" device usb 2.6 on end end + chip drivers/usb/acpi + register "desc" = ""LTE"" + register "type" = "UPC_TYPE_INTERNAL" + device usb 3.3 on end + end end end end # USB xHCI diff --git a/src/mainboard/google/dedede/variants/metaknight/variant.c b/src/mainboard/google/dedede/variants/metaknight/variant.c new file mode 100644 index 0000000..2540fc7 --- /dev/null +++ b/src/mainboard/google/dedede/variants/metaknight/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(); +}