From 56508967d8b433b2821d54207370332e1f319354 Mon Sep 17 00:00:00 2001
From: Mario Scheithauer <mario.scheithauer@siemens.com>
Date: Thu, 23 Aug 2018 14:48:06 +0200
Subject: siemens/mc_apl1: Disable PCI clock outputs on XIO bridge

This patch disables the unused PCI clock outputs on the XIO2001 PCI
Express to PCI Bridge.

Change-Id: I0b9cf51a713f4ab46e71d250397486d136c26177
Signed-off-by: Mario Scheithauer <mario.scheithauer@siemens.com>
Reviewed-on: https://review.coreboot.org/28284
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Werner Zeh <werner.zeh@siemens.com>
---
 src/mainboard/siemens/mc_apl1/variants/mc_apl1/mainboard.c | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'src/mainboard/siemens')

diff --git a/src/mainboard/siemens/mc_apl1/variants/mc_apl1/mainboard.c b/src/mainboard/siemens/mc_apl1/variants/mc_apl1/mainboard.c
index 540e322b95..da01ce3905 100644
--- a/src/mainboard/siemens/mc_apl1/variants/mc_apl1/mainboard.c
+++ b/src/mainboard/siemens/mc_apl1/variants/mc_apl1/mainboard.c
@@ -15,6 +15,8 @@
 
 #include <bootstate.h>
 #include <console/console.h>
+#include <device/pci_ids.h>
+#include <device/pci_ops.h>
 #include <gpio.h>
 #include <hwilib.h>
 #include <intelblocks/lpc_lib.h>
@@ -28,6 +30,7 @@
 void variant_mainboard_final(void)
 {
 	int status;
+	struct device *dev = NULL;
 
 	/*
 	 * Set up the DP2LVDS converter.
@@ -47,6 +50,11 @@ void variant_mainboard_final(void)
 	 * INTA#->PIRQB#, INTB#->PIRQC#, INTC#->PIRQD#, INTD#-> PIRQA#
 	 */
 	pcr_write16(PID_ITSS, 0x314c, 0x0321);
+
+	/* Disable clock outputs 1-5 (CLKOUT) for XIO2001 PCIe to PCI Bridge. */
+	dev = dev_find_device(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_XIO2001, 0);
+	if (dev)
+		pci_write_config8(dev, 0xd8, 0x3e);
 }
 
 static void wait_for_legacy_dev(void *unused)
-- 
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