soc/amd/common/espi_util: make reg parameter unsigned

Th register number passed to the low level read/write functions should
never be negative.

Change-Id: I5d7e117b3badab900d030be8e69ded026d659f8a
Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/44348
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>

1 files changed, 6 insertions, 6 deletions

diff --git a/src/soc/amd/common/block/lpc/espi_util.c b/src/soc/amd/common/block/lpc/espi_util.c
index 29028a4b72..ae5edb6592 100644
--- a/src/soc/amd/common/block/lpc/espi_util.c
+++ b/src/soc/amd/common/block/lpc/espi_util.c
@@ -24,32 +24,32 @@ static uintptr_t espi_get_bar(void)
 	return espi_bar;
 }
 
-static uint32_t espi_read32(int reg)
+static uint32_t espi_read32(unsigned int reg)
 {
 	return read32((void *)(espi_get_bar() + reg));
 }
 
-static void espi_write32(int reg, uint32_t val)
+static void espi_write32(unsigned int reg, uint32_t val)
 {
 	write32((void *)(espi_get_bar() + reg), val);
 }
 
-static uint16_t espi_read16(int reg)
+static uint16_t espi_read16(unsigned int reg)
 {
 	return read16((void *)(espi_get_bar() + reg));
 }
 
-static void espi_write16(int reg, uint16_t val)
+static void espi_write16(unsigned int reg, uint16_t val)
 {
 	write16((void *)(espi_get_bar() + reg), val);
 }
 
-static uint8_t espi_read8(int reg)
+static uint8_t espi_read8(unsigned int reg)
 {
 	return read8((void *)(espi_get_bar() + reg));
 }
 
-static void espi_write8(int reg, uint8_t val)
+static void espi_write8(unsigned int reg, uint8_t val)
 {
 	write8((void *)(espi_get_bar() + reg), val);
 }