From 6295b8a57aec05add2ab4c4d9af53bf8e707b882 Mon Sep 17 00:00:00 2001 From: Aaron Durbin Date: Fri, 24 Feb 2017 15:56:27 -0600 Subject: [PATCH] mainboard/google/reef: keep LPSS_UART2_TXD high in suspend state The cr50 part on reef is connected to the SoC's UART lines. However, when the tx signal is low it causes an interrupt to fire on cr50. Therefore, keep the tx signal high in suspend state so that it doesn't cause an interrupt storm on cr50 which prevents cr50 from sleeping. BUG=chrome-os-partner:63283 BRANCH=reef TEST=s0ix no longer causes interrupt storm on cr50. Power consumption normal. Change-Id: Idaeb8e4427c1cec651122de76a43daa15dc54d0f Signed-off-by: Aaron Durbin Reviewed-on: https://review.coreboot.org/18491 Tested-by: build bot (Jenkins) Reviewed-by: Furquan Shaikh --- src/mainboard/google/reef/variants/baseboard/gpio.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/mainboard/google/reef/variants/baseboard/gpio.c b/src/mainboard/google/reef/variants/baseboard/gpio.c index a9a62487e9..ae89da10d3 100644 --- a/src/mainboard/google/reef/variants/baseboard/gpio.c +++ b/src/mainboard/google/reef/variants/baseboard/gpio.c @@ -327,7 +327,7 @@ static const struct pad_config gpio_table[] = { PAD_CFG_GPO(GPIO_44, 1, DEEP), /* GPS_RST_ODL */ PAD_CFG_GPI(GPIO_45, UP_20K, DEEP), /* LPSS_UART1_CTS - MEM_CONFIG3 */ PAD_CFG_NF(GPIO_46, NATIVE, DEEP, NF1), /* LPSS_UART2_RXD */ - PAD_CFG_NF(GPIO_47, NATIVE, DEEP, NF1), /* LPSS_UART2_TXD */ + PAD_CFG_NF_IOSSTATE(GPIO_47, NATIVE, DEEP, NF1, Tx1RXDCRx0), /* LPSS_UART2_TXD */ PAD_CFG_GPI(GPIO_48, UP_20K, DEEP), /* LPSS_UART2_RTS - unused */ PAD_CFG_GPI_SMI_LOW(GPIO_49, NONE, DEEP, EDGE_SINGLE), /* LPSS_UART2_CTS - EC_SMI_L */