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| Started by | Srinivas Kandagatla <srinivas.kandagatla@linaro.org> |
|---|---|
| First post | 2015-12-11 19:20 +0100 |
| Last post | 2015-12-11 19:20 +0100 |
| Articles | 3 — 1 participant |
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[PATCH 0/2] arm64: dts: qcom: few i2c fixes Srinivas Kandagatla <srinivas.kandagatla@linaro.org> - 2015-12-11 19:20 +0100
[PATCH 1/2] arm64: dts: fix the i2c aliasing to match to schematics. Srinivas Kandagatla <srinivas.kandagatla@linaro.org> - 2015-12-11 19:20 +0100
[PATCH 2/2] arm64: dts: set the default i2c pin drive strength to 16mA Srinivas Kandagatla <srinivas.kandagatla@linaro.org> - 2015-12-11 19:20 +0100
| From | Srinivas Kandagatla <srinivas.kandagatla@linaro.org> |
|---|---|
| Date | 2015-12-11 19:20 +0100 |
| Subject | [PATCH 0/2] arm64: dts: qcom: few i2c fixes |
| Message-ID | <qEAsq-81R-13@gated-at.bofh.it> |
Hi Andy, Here are two i2c dt fixes which I have been using for long time on Landing team tree. Can you please consider fixes for v4.5. Thanks, srini Srinivas Kandagatla (2): arm64: dts: fix the i2c aliasing to match to schematics. arm64: dts: set the default i2c pin drive strength to 16mA arch/arm64/boot/dts/qcom/apq8016-sbc.dtsi | 3 +++ arch/arm64/boot/dts/qcom/msm8916-pins.dtsi | 6 +++--- 2 files changed, 6 insertions(+), 3 deletions(-) -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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| From | Srinivas Kandagatla <srinivas.kandagatla@linaro.org> |
|---|---|
| Date | 2015-12-11 19:20 +0100 |
| Subject | [PATCH 1/2] arm64: dts: fix the i2c aliasing to match to schematics. |
| Message-ID | <qEAsq-81R-21@gated-at.bofh.it> |
| In reply to | #1289799 |
This patch fixes the i2c bus number aliasing so that it matches with the
schematics bus naming.
Without this patch the user might would get bus numbers depending on
the order the devices are probed.
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
---
arch/arm64/boot/dts/qcom/apq8016-sbc.dtsi | 3 +++
1 file changed, 3 insertions(+)
diff --git a/arch/arm64/boot/dts/qcom/apq8016-sbc.dtsi b/arch/arm64/boot/dts/qcom/apq8016-sbc.dtsi
index 6b8abbe..6f19956 100644
--- a/arch/arm64/boot/dts/qcom/apq8016-sbc.dtsi
+++ b/arch/arm64/boot/dts/qcom/apq8016-sbc.dtsi
@@ -20,6 +20,9 @@
aliases {
serial0 = &blsp1_uart2;
serial1 = &blsp1_uart1;
+ i2c0 = &blsp_i2c2;
+ i2c1 = &blsp_i2c6;
+ i2c3 = &blsp_i2c4;
};
chosen {
--
1.9.1
--
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| From | Srinivas Kandagatla <srinivas.kandagatla@linaro.org> |
|---|---|
| Date | 2015-12-11 19:20 +0100 |
| Subject | [PATCH 2/2] arm64: dts: set the default i2c pin drive strength to 16mA |
| Message-ID | <qEAsq-81R-23@gated-at.bofh.it> |
| In reply to | #1289799 |
2mA drive strength is not enough when we connect multiple i2c devices
on the bus with different pull up resistors.
This issue was detected when multiple i2c devices connected on the other side
of level shifters on Linaro sensor board. Maxing up to 16mA made i2c much stable.
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
---
arch/arm64/boot/dts/qcom/msm8916-pins.dtsi | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/arch/arm64/boot/dts/qcom/msm8916-pins.dtsi b/arch/arm64/boot/dts/qcom/msm8916-pins.dtsi
index 49ec55a..1991af7 100644
--- a/arch/arm64/boot/dts/qcom/msm8916-pins.dtsi
+++ b/arch/arm64/boot/dts/qcom/msm8916-pins.dtsi
@@ -272,7 +272,7 @@
};
pinconf {
pins = "gpio6", "gpio7";
- drive-strength = <2>;
+ drive-strength = <16>;
bias-disable = <0>;
};
};
@@ -296,7 +296,7 @@
};
pinconf {
pins = "gpio14", "gpio15";
- drive-strength = <2>;
+ drive-strength = <16>;
bias-disable = <0>;
};
};
@@ -320,7 +320,7 @@
};
pinconf {
pins = "gpio22", "gpio23";
- drive-strength = <2>;
+ drive-strength = <16>;
bias-disable = <0>;
};
};
--
1.9.1
--
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