[coreboot-gerrit] New patch to review for coreboot: t210: i2c6: enable SOR_SAFE and DPAUX1 clocks for i2c6 to work

[Patrick Georgi (pgeorgi@google.com)]

Patrick Georgi (pgeorgi at google.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/10840

-gerrit

commit 29dc9d6e7a2b070f9aa114c29dd97bc4a3c6ac85
Author: Yen Lin <yelin at nvidia.com>
Date:   Fri May 29 14:36:19 2015 -0700

    t210: i2c6: enable SOR_SAFE and DPAUX1 clocks for i2c6 to work
    
    I2C6 controller needs SOR_SAFE and DPAUX1 clocks to work. These 2 clocks
    are mistakenly enabled by MBIST. MBIST fix will be submitted next, which
    will disable these 2 clocks as initial states. Enable these 2 clocks now
    so I2C6 will continue to work after MBIST fix.
    
    BUG=None
    BRANCH=None
    TEST=Tested on Smaug, make sure that panel shows display
         (I2C6 is used to turn on backlight)
    
    Change-Id: Id47453e784d53fd6831e8d19a8d57c04c4e1f82f
    Signed-off-by: Patrick Georgi <pgeorgi at chromium.org>
    Original-Commit-Id: 83e935f100be85e1e831a3f9f16962304f7cd7d6
    Original-Signed-off-by: Yen Lin <yelin at nvidia.com>
    Original-Change-Id: If312881c94570066bdc54f0f5c48226e862bddc6
    Original-Reviewed-on: https://chromium-review.googlesource.com/282415
    Original-Reviewed-by: Tom Warren <twarren at nvidia.com>
    Original-Reviewed-by: Furquan Shaikh <furquan at chromium.org>
---
 src/soc/nvidia/tegra210/i2c6.c              | 3 +++
 src/soc/nvidia/tegra210/include/soc/clock.h | 2 ++
 2 files changed, 5 insertions(+)

diff --git a/src/soc/nvidia/tegra210/i2c6.c b/src/soc/nvidia/tegra210/i2c6.c
index 915a538..9213057 100644
--- a/src/soc/nvidia/tegra210/i2c6.c
+++ b/src/soc/nvidia/tegra210/i2c6.c
@@ -65,6 +65,9 @@ void soc_configure_i2c6pad(void)
 	 */
 	soc_configure_host1x();
 
+	/* enable SOR_SAFE and DPAUX_1 clocks */
+	clock_enable_y(CLK_Y_DPAUX1 | CLK_Y_SOR_SAFE);
+
 	/* Now we can write the I2C6 mux in DPAUX */
 	write32((void *)DPAUX_HYBRID_PADCTL, I2C6_PADCTL);
 	/* Finally, power up the pads */
diff --git a/src/soc/nvidia/tegra210/include/soc/clock.h b/src/soc/nvidia/tegra210/include/soc/clock.h
index ff9b282..8564c83 100644
--- a/src/soc/nvidia/tegra210/include/soc/clock.h
+++ b/src/soc/nvidia/tegra210/include/soc/clock.h
@@ -158,7 +158,9 @@ enum {
 	CLK_X_SPARE = 0x1 << 0,
 
 	CLK_Y_APE = 0x1 << 6,
+	CLK_Y_DPAUX1 = 0x1 << 15,
 	CLK_Y_QSPI = 0x1 << 19,
+	CLK_Y_SOR_SAFE = 0x1 << 30,
 };
 
 enum {