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authorPtilopsis Leucotis <PtilopsisLeucotis@yandex.com>2022-05-11 19:55:05 +0300
committerChristian Lamparter <chunkeey@gmail.com>2022-05-15 16:39:45 +0200
commit0f8eba4f958126cb79ca901f38b0b904a581d3e8 (patch)
treee7f47f0a0cf34ad8ac50ae6deec5c3fa74e0d17a /target/linux/ath79
parent308ce4607687fb2e1cd013f221751139e3cdafdb (diff)
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ath79: fix I2C on GL-AR300M devices
On GL-AR300M Series GPIO17 described as I2C SDA in Device Tree. Because of GPIO_OUT_FUNCTION4 register was not initialized on start, GPIO17 was uncontrollable, it always in high state. According to QCA9531 documentation, default setting of GPIO17 is SYS_RST_L. In order to make GPIO17 controllable, it should write value 0x00 on bits [15:8] of GPIO_OUT_FUNCTION4 register, located at 0x1804003C address. Signed-off-by: Ptilopsis Leucotis <PtilopsisLeucotis@yandex.com> (cherry picked from commit 57efdd6a2d815d2491c5b7f22ffaeb6a845bfd0a)
Diffstat (limited to 'target/linux/ath79')
-rw-r--r--target/linux/ath79/dts/qca9531_glinet_gl-ar300m.dtsi9
1 files changed, 9 insertions, 0 deletions
diff --git a/target/linux/ath79/dts/qca9531_glinet_gl-ar300m.dtsi b/target/linux/ath79/dts/qca9531_glinet_gl-ar300m.dtsi
index 2eaff61f50..47fda91a0c 100644
--- a/target/linux/ath79/dts/qca9531_glinet_gl-ar300m.dtsi
+++ b/target/linux/ath79/dts/qca9531_glinet_gl-ar300m.dtsi
@@ -72,6 +72,9 @@
i2c: i2c {
compatible = "i2c-gpio";
+ pinctrl-names = "default";
+ pinctrl-0 = <&enable_gpio17>;
+
sda-gpios = <&gpio 17 (GPIO_ACTIVE_HIGH|GPIO_OPEN_DRAIN)>;
scl-gpios = <&gpio 16 (GPIO_ACTIVE_HIGH|GPIO_OPEN_DRAIN)>;
};
@@ -181,3 +184,9 @@
reg = <0x0 0x6>;
};
};
+
+&pinmux {
+ enable_gpio17: pinmux_enable_gpio17 {
+ pinctrl-single,bits = <0x10 0x0000 0xff00>;
+ };
+};