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authorNico Huber <nico.huber@secunet.com>2017-08-17 16:08:00 +0200
committerNico Huber <nico.h@gmx.de>2017-08-21 14:20:25 +0000
commit6278867065e0849ba54ed7022fc9aab819daaaaf (patch)
treecab62f8a58a8f7d9d1ae5c95cc2ecc1b5abd8fb0 /src/soc/intel/common
parent3f09b0ffef990286ecca344cf73023b35be42406 (diff)
downloadcoreboot-6278867065e0849ba54ed7022fc9aab819daaaaf.tar.xz
soc/intel/common/smbus: Don't clear random bits
FSP might have done some settings for us there. Use pci_update_config32() since the register is documented to be 32 bits wide. Change-Id: I995e8a731a6958f10600174d031bb94f5a0a66db Signed-off-by: Nico Huber <nico.huber@secunet.com> Reviewed-on: https://review.coreboot.org/21072 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net> Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Diffstat (limited to 'src/soc/intel/common')
-rw-r--r--src/soc/intel/common/block/smbus/smbus.c6
1 files changed, 2 insertions, 4 deletions
diff --git a/src/soc/intel/common/block/smbus/smbus.c b/src/soc/intel/common/block/smbus/smbus.c
index 8ee38eeeb4..e526bafc79 100644
--- a/src/soc/intel/common/block/smbus/smbus.c
+++ b/src/soc/intel/common/block/smbus/smbus.c
@@ -53,12 +53,10 @@ static struct smbus_bus_operations lops_smbus_bus = {
static void pch_smbus_init(device_t dev)
{
struct resource *res;
- u16 reg16;
/* Enable clock gating */
- reg16 = pci_read_config32(dev, 0x80);
- reg16 &= ~((1 << 8)|(1 << 10)|(1 << 12)|(1 << 14));
- pci_write_config32(dev, 0x80, reg16);
+ pci_update_config32(dev, 0x80,
+ ~((1 << 8) | (1 << 10) | (1 << 12) | (1 << 14)), 0);
/* Set Receive Slave Address */
res = find_resource(dev, PCI_BASE_ADDRESS_4);