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authorPravin Angolkar <pravin.k.angolkar@intel.com>2015-09-29 19:31:41 +0530
committerMartin Roth <martinroth@google.com>2016-01-18 01:18:38 +0100
commit5d4735d140898ebb459a8a54f082568b8ffdb212 (patch)
tree3ea334e476ad7c31e71a9ee1dce76ea96a726904 /src
parent285b44f72360f44f95fb7ef84cd90f51cbfd3a5d (diff)
downloadcoreboot-5d4735d140898ebb459a8a54f082568b8ffdb212.tar.xz
intel/kunimitsu: Power gate Kepler device
This patch power gates the Kepler module on skylake kunimitsu board. This is required to save power since this is consuming over 500mw of power in all active use cases. The device can be powered on later by using the kernel driver as required by setting the kepler enable gpio high. BRANCH=None BUG=chrome-os-partner:45962 TEST=Build and Boot Kunimitsu and check lspci. The Kepler device should not be listed. Also power measurement of board should give approximately 300mW of reduction in power. Change-Id: I244a23385e20ef1431dc895536c8a47e1f5770d7 Signed-off-by: Patrick Georgi <pgeorgi@chromium.org> Original-Commit-Id: 8d4fb7d01f32ac307a351c307b8461628c0e5414 Original-Change-Id: Idafa74d7ff14d67a5b1e635f783efd84b5a7399c Original-Signed-off-by: Pravin Angolkar <pravin.k.angolkar@intel.com> Original-Reviewed-on: https://chromium-review.googlesource.com/302277 Original-Commit-Ready: Naveenkrishna Ch <naveenkrishna.ch@intel.com> Original-Tested-by: Pravin K Angolkar <pravin.k.angolkar@intel.com> Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org> Reviewed-on: https://review.coreboot.org/12964 Tested-by: build bot (Jenkins) Reviewed-by: Martin Roth <martinroth@google.com>
Diffstat (limited to 'src')
-rwxr-xr-xsrc/mainboard/intel/kunimitsu/gpio.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/src/mainboard/intel/kunimitsu/gpio.h b/src/mainboard/intel/kunimitsu/gpio.h
index 1470ba6f26..58b1948445 100755
--- a/src/mainboard/intel/kunimitsu/gpio.h
+++ b/src/mainboard/intel/kunimitsu/gpio.h
@@ -120,7 +120,7 @@ static const struct pad_config gpio_table[] = {
/* UART0_RXD */ /* GPP_C8 */
/* UART0_TXD */ /* GPP_C9 */
/* NFC_RST* */ PAD_CFG_GPO(GPP_C10, 0, DEEP),
-/* EN_PP3300_KEPLER */ PAD_CFG_TERM_GPO(GPP_C11, 1, 20K_PD, DEEP),
+/* EN_PP3300_KEPLER */ PAD_CFG_TERM_GPO(GPP_C11, 0, 20K_PD, DEEP),
/* PCH_MEM_CFG0 */ PAD_CFG_GPI(GPP_C12, NONE, DEEP),
/* PCH_MEM_CFG1 */ PAD_CFG_GPI(GPP_C13, NONE, DEEP),
/* PCH_MEM_CFG2 */ PAD_CFG_GPI(GPP_C14, NONE, DEEP),
@@ -230,8 +230,8 @@ static const struct pad_config gpio_table[] = {
/* Early pad configuration in romstage. */
static const struct pad_config early_gpio_table[] = {
/* SRCCLKREQ2# */ PAD_CFG_NF(GPP_B7, NONE, DEEP, NF1), /* KEPLER */
-/* UART0_CTS# */ PAD_CFG_GPO(GPP_C11, 1, DEEP), /* EN_PP3300_KEPLER */
/* SPI_WP_STATUS */ PAD_CFG_GPI(GPP_C23, 20K_PU, DEEP),
+/* UART0_CTS# */ PAD_CFG_GPO(GPP_C11, 0, DEEP), /* EN_PP3300_KEPLER */
};
#endif