New patch to review for coreboot: google/eve: Fix FPC support

[Duncan Laurie]

Duncan Laurie ([e-mail]) just uploaded a new patch set to gerrit, which you can find at https://review.coreboot.org/18395

-gerrit

commit 6af3210d9d53750a6f5ee6f96d0db32346104339
Author: Duncan Laurie 
Date:   Fri Feb 17 17:24:12 2017 -0800

google/eve: Fix FPC support

Currently UART0 GPIOs are being put into native mode during FSP-S
    stage, so have ramstage re-configure them back to regular GPIO mode.

GPP_C8 does not seem to be functioning properly when routed to the
    APIC, possibly due to the UART0 being enabled even though it is unused,
    which is required because UART0 is PCI 1e.0 and so must be present for
    other 1e.x functions to be enumerated.  Instead, use this pin as a GPIO
    interrupt so it will be routed through the GPIO controller at IRQ 14.

GPP_C9 was inverted and was only working because the pin was being
    re-configured in FSP-S.

Also export the reset gpio as a device property so it can be used by
    the kernel driver, which will stop it from complaining at boot.

BUG=chrome-os-partner:61233
    TEST=verify that the interrupt and device is functional in the OS

Change-Id: Iaf9efbf50a13a981c6a9bbd507475777837e9c12
    Signed-off-by: Duncan Laurie 
---
 src/mainboard/google/eve/devicetree.cb | 3 ++-
 src/mainboard/google/eve/gpio.h        | 9 +++++++--
 src/mainboard/google/eve/mainboard.c   | 4 ++++
 3 files changed, 13 insertions(+), 3 deletions(-)

diff --git a/src/mainboard/google/eve/devicetree.cb b/src/mainboard/google/eve/devicetree.cb
index 3321565..dfe7281 100644
--- a/src/mainboard/google/eve/devicetree.cb
+++ b/src/mainboard/google/eve/devicetree.cb
@@ -260,7 +260,8 @@ chip soc/intel/skylake
    			register "hid" = "ACPI_DT_NAMESPACE_HID"
    			register "uid" = "1"
    			register "compat_string" = ""fpc,fpc1020""
-				register "irq" = "IRQ_EDGE_LOW(GPP_C8_IRQ)"
+				register "irq_gpio" = "ACPI_GPIO_IRQ_EDGE_HIGH(GPP_C8)"
+				register "reset_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_LOW(GPP_C9)"
    			device spi 0 on end
    		end
    	end # GSPI #1
diff --git a/src/mainboard/google/eve/gpio.h b/src/mainboard/google/eve/gpio.h
index f5b09d9..85011f1 100644
--- a/src/mainboard/google/eve/gpio.h
+++ b/src/mainboard/google/eve/gpio.h
@@ -103,8 +103,8 @@ static const struct pad_config gpio_table[] = {
 /* SML0ALERT# */	PAD_CFG_NC(GPP_C5),
 /* SM1CLK */		PAD_CFG_GPI(GPP_C6, 20K_PU, DEEP), /* EC_IN_RW */
 /* SM1DATA */		PAD_CFG_NC(GPP_C7),
-/* UART0_RXD */		PAD_CFG_GPI_APIC(GPP_C8, NONE, PLTRST), /* FP_INT */
-/* UART0_TXD */		PAD_CFG_GPO(GPP_C9, 0, DEEP), /* FP_RST_ODL */
+/* UART0_RXD */		PAD_CFG_GPI(GPP_C8, NONE, PLTRST), /* FP_INT */
+/* UART0_TXD */		PAD_CFG_GPO(GPP_C9, 1, DEEP), /* FP_RST_ODL */
 /* UART0_RTS# */	PAD_CFG_NC(GPP_C10),
 /* UART0_CTS# */	PAD_CFG_NC(GPP_C11),
 /* UART1_RXD */		PAD_CFG_GPI(GPP_C12, NONE, DEEP), /* MEM_CONFIG[0] */
@@ -231,6 +231,11 @@ static const struct pad_config early_gpio_table[] = {
 /* UART2_TXD */		PAD_CFG_NF(GPP_C21, NONE, DEEP, NF1), /* SERVO */
 };

+static const struct pad_config late_gpio_table[] = {
+/* UART0_RXD */		PAD_CFG_GPI(GPP_C8, NONE, PLTRST), /* FP_INT */
+/* UART0_TXD */		PAD_CFG_GPO(GPP_C9, 1, DEEP), /* FP_RST_ODL */
+};
+
 #endif

#endif
diff --git a/src/mainboard/google/eve/mainboard.c b/src/mainboard/google/eve/mainboard.c
index bffc9e6..bb3c6bd 100644
--- a/src/mainboard/google/eve/mainboard.c
+++ b/src/mainboard/google/eve/mainboard.c
@@ -18,10 +18,14 @@
 #include <device/device.h>
 #include <ec/ec.h>
 #include <vendorcode/google/chromeos/chromeos.h>
+#include <gpio.h>
+#include <soc/gpio.h>
+#include "gpio.h"

static void mainboard_init(device_t dev)
 {
    mainboard_ec_init();
+	gpio_configure_pads(late_gpio_table, ARRAY_SIZE(late_gpio_table));
 }

static void mainboard_enable(device_t dev)