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authorSimon Glass <sjg@chromium.org>2018-07-11 15:51:27 -0600
committerMartin Roth <martinroth@google.com>2018-07-18 20:10:45 +0000
commite577168ae3163768bc76d23e4e121a57b436abd6 (patch)
tree60c88848327dbf51163a4c649eeaf2409fedd8bd
parent82eb80cc8c08d2f676e7cb20b3b9bdf45b91d214 (diff)
downloadcoreboot-e577168ae3163768bc76d23e4e121a57b436abd6.tar.xz
mainboard/google/Kahlee: Select low-power mode for WiFi
Put the PCIe clock pins in power-saving mode for the WiFi module to save power. Note: This currently does not appear to have any effect on grunt. BUG=b:110041917 BRANCH=none TEST=boot without this patch: $ iotools mem_read32 0xfed80e00 0x0046f3ff With this patch: $ iotools mem_read32 0xfed80e00 0x0046f3f1 Change-Id: I389815bc36b8610a30b0cbb9d73262ad392e0181 Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-on: https://review.coreboot.org/27465 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Aaron Durbin <adurbin@chromium.org> Reviewed-by: Martin Roth <martinroth@google.com> Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
-rw-r--r--src/mainboard/google/kahlee/mainboard.c6
-rw-r--r--src/soc/amd/stoneyridge/include/soc/southbridge.h4
2 files changed, 10 insertions, 0 deletions
diff --git a/src/mainboard/google/kahlee/mainboard.c b/src/mainboard/google/kahlee/mainboard.c
index 2efcb20bbc..2540bcd47d 100644
--- a/src/mainboard/google/kahlee/mainboard.c
+++ b/src/mainboard/google/kahlee/mainboard.c
@@ -150,6 +150,12 @@ static void mainboard_init(void *chip_info)
GPP_CLK2_CLOCK_REQ_MAP_MASK,
GPP_CLK2_CLOCK_REQ_MAP_CLK_REQ2 <<
GPP_CLK2_CLOCK_REQ_MAP_SHIFT);
+
+ /* Same for the WiFi */
+ clrsetbits_le32((uint32_t *)(MISC_MMIO_BASE + GPP_CLK_CNTRL),
+ GPP_CLK0_CLOCK_REQ_MAP_MASK,
+ GPP_CLK0_CLOCK_REQ_MAP_CLK_REQ0 <<
+ GPP_CLK0_CLOCK_REQ_MAP_SHIFT);
}
/*************************************************
diff --git a/src/soc/amd/stoneyridge/include/soc/southbridge.h b/src/soc/amd/stoneyridge/include/soc/southbridge.h
index 3127f5cd47..2e953091f8 100644
--- a/src/soc/amd/stoneyridge/include/soc/southbridge.h
+++ b/src/soc/amd/stoneyridge/include/soc/southbridge.h
@@ -366,6 +366,10 @@
#define GPP_CLK2_CLOCK_REQ_MAP_MASK (0xf << GPP_CLK2_CLOCK_REQ_MAP_SHIFT)
#define GPP_CLK2_CLOCK_REQ_MAP_CLK_REQ2 3
+#define GPP_CLK0_CLOCK_REQ_MAP_SHIFT 0
+#define GPP_CLK0_CLOCK_REQ_MAP_MASK (0xf << GPP_CLK0_CLOCK_REQ_MAP_SHIFT)
+#define GPP_CLK0_CLOCK_REQ_MAP_CLK_REQ0 1
+
struct stoneyridge_aoac {
int enable;
int status;