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authorJohn Crispin <john@openwrt.org>2015-05-23 15:27:45 +0000
committerJohn Crispin <john@openwrt.org>2015-05-23 15:27:45 +0000
commitf74477de486705612bc4d2eaf80dfd92c9015a24 (patch)
tree462b2c056f556868ac06563311ff59a6a8830a55 /target/linux/ipq806x/patches-3.18/023-ARM-dts-ipq806x-Disable-i2c-device-on-gsbi4.patch
parent1c6d332d8ff292e4d8de21c339ce001020c2ed27 (diff)
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ipq806x: disable i2c device on gsbi4
Patch cherry-picked from the following location: https://chromium-review.googlesource.com/#/c/269931/ Disable the i2c device on gsbi4 and mark gsbi4_h and gsbi4_qup clks as unused. If they are enabled, clock framework will turn them off at end of probe. On ipq806x by design gsbi4_qup, gsbi4_h clks and i2c on gsbi4 are meant for RPM usage. So turning them off in kernel is incorrect. Signed-off-by: Mathieu Olivari <mathieu@codeaurora.org> SVN-Revision: 45728
Diffstat (limited to 'target/linux/ipq806x/patches-3.18/023-ARM-dts-ipq806x-Disable-i2c-device-on-gsbi4.patch')
-rw-r--r--target/linux/ipq806x/patches-3.18/023-ARM-dts-ipq806x-Disable-i2c-device-on-gsbi4.patch53
1 files changed, 53 insertions, 0 deletions
diff --git a/target/linux/ipq806x/patches-3.18/023-ARM-dts-ipq806x-Disable-i2c-device-on-gsbi4.patch b/target/linux/ipq806x/patches-3.18/023-ARM-dts-ipq806x-Disable-i2c-device-on-gsbi4.patch
new file mode 100644
index 0000000000..319859b109
--- /dev/null
+++ b/target/linux/ipq806x/patches-3.18/023-ARM-dts-ipq806x-Disable-i2c-device-on-gsbi4.patch
@@ -0,0 +1,53 @@
+--- a/arch/arm/boot/dts/qcom-ipq8064-ap148.dts
++++ b/arch/arm/boot/dts/qcom-ipq8064-ap148.dts
+@@ -46,15 +46,12 @@
+ serial@16340000 {
+ status = "ok";
+ };
+-
+- i2c4: i2c@16380000 {
+- status = "ok";
+-
+- clock-frequency = <200000>;
+-
+- pinctrl-0 = <&i2c4_pins>;
+- pinctrl-names = "default";
+- };
++ /*
++ * The i2c device on gsbi4 should not be enabled.
++ * On ipq806x designs gsbi4 i2c is meant for exclusive
++ * RPM usage. Turning this on in kernel manifests as
++ * i2c failure for the RPM.
++ */
+ };
+
+ gsbi5: gsbi@1a200000 {
+--- a/drivers/clk/qcom/gcc-ipq806x.c
++++ b/drivers/clk/qcom/gcc-ipq806x.c
+@@ -794,7 +794,7 @@ static struct clk_rcg gsbi7_qup_src = {
+ .parent_names = gcc_pxo_pll8,
+ .num_parents = 2,
+ .ops = &clk_rcg_ops,
+- .flags = CLK_SET_PARENT_GATE,
++ .flags = CLK_SET_PARENT_GATE | CLK_IGNORE_UNUSED,
+ },
+ },
+ };
+@@ -810,7 +810,7 @@ static struct clk_branch gsbi7_qup_clk =
+ .parent_names = (const char *[]){ "gsbi7_qup_src" },
+ .num_parents = 1,
+ .ops = &clk_branch_ops,
+- .flags = CLK_SET_RATE_PARENT,
++ .flags = CLK_SET_RATE_PARENT | CLK_IGNORE_UNUSED,
+ },
+ },
+ };
+@@ -858,7 +858,7 @@ static struct clk_branch gsbi4_h_clk = {
+ .hw.init = &(struct clk_init_data){
+ .name = "gsbi4_h_clk",
+ .ops = &clk_branch_ops,
+- .flags = CLK_IS_ROOT,
++ .flags = CLK_IS_ROOT | CLK_IGNORE_UNUSED,
+ },
+ },
+ };