| Message ID | 20210102045940.26874-1-shawn.guo@linaro.org |
|---|---|
| State | Accepted |
| Commit | a9164910c5ceed63551280a4a0b85d37ac2b19a5 |
| Headers | show |
| Series | [v2] arm64: dts: qcom: c630: keep both touchpad devices enabled | expand |
Hello: This patch was applied to qcom/linux.git (refs/heads/for-next): On Sat, 2 Jan 2021 12:59:40 +0800 you wrote: > Indicated by AML code in ACPI table, the touchpad in-use could be found > on two possible slave addresses on &i2c3, i.e. hid@15 and hid@2c. And > which one is in-use can be determined by reading another address on the > I2C bus. Unfortunately, for DT boot, there is currently no support in > firmware to make this check and patch DT accordingly. This results in > a non-functional touchpad on those C630 devices with hid@2c. > > [...] Here is the summary with links: - [v2] arm64: dts: qcom: c630: keep both touchpad devices enabled https://git.kernel.org/qcom/c/a9164910c5ce You are awesome, thank you! -- Deet-doot-dot, I am a bot. https://korg.docs.kernel.org/patchwork/pwbot.html
diff --git a/arch/arm64/boot/dts/qcom/sdm850-lenovo-yoga-c630.dts b/arch/arm64/boot/dts/qcom/sdm850-lenovo-yoga-c630.dts index dcfe66f169f9..7929665aeaee 100644 --- a/arch/arm64/boot/dts/qcom/sdm850-lenovo-yoga-c630.dts +++ b/arch/arm64/boot/dts/qcom/sdm850-lenovo-yoga-c630.dts @@ -353,6 +353,8 @@ &i2c3 { status = "okay"; clock-frequency = <400000>; + /* Overwrite pinctrl-0 from sdm845.dtsi */ + pinctrl-0 = <&qup_i2c3_default &i2c3_hid_active>; tsel: hid@15 { compatible = "hid-over-i2c"; @@ -360,9 +362,6 @@ hid-descr-addr = <0x1>; interrupts-extended = <&tlmm 37 IRQ_TYPE_LEVEL_HIGH>; - - pinctrl-names = "default"; - pinctrl-0 = <&i2c3_hid_active>; }; tsc2: hid@2c { @@ -371,11 +370,6 @@ hid-descr-addr = <0x20>; interrupts-extended = <&tlmm 37 IRQ_TYPE_LEVEL_HIGH>; - - pinctrl-names = "default"; - pinctrl-0 = <&i2c3_hid_active>; - - status = "disabled"; }; };
Indicated by AML code in ACPI table, the touchpad in-use could be found on two possible slave addresses on &i2c3, i.e. hid@15 and hid@2c. And which one is in-use can be determined by reading another address on the I2C bus. Unfortunately, for DT boot, there is currently no support in firmware to make this check and patch DT accordingly. This results in a non-functional touchpad on those C630 devices with hid@2c. As i2c-hid driver will stop probing the device if there is nothing on the slave address, we can actually keep both devices enabled in DT, and i2c-hid driver will only probe the existing one. The only problem is that we cannot set up pinctrl in both device nodes, as two devices with the same pinctrl will cause pin conflict that makes the second device fail to probe. Let's move the pinctrl state up to parent node to solve this problem. As the pinctrl state of parent node is already defined in sdm845.dtsi, it ends up with overwriting pinctrl-0 with i2c3_hid_active state added in there. Signed-off-by: Shawn Guo <shawn.guo@linaro.org> --- Changes for v2: - Overwrite pinctrl-0 from sdm845.dtsi with qup_i2c3_default preserved. arch/arm64/boot/dts/qcom/sdm850-lenovo-yoga-c630.dts | 10 ++-------- 1 file changed, 2 insertions(+), 8 deletions(-) -- 2.17.1