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| author | Ryan Salsbury <ryanrs@gmail.com> | 2024-04-29 18:05:14 -0700 |
|---|---|---|
| committer | Robert Marko <robimarko@gmail.com> | 2024-04-30 12:01:04 +0200 |
| commit | 47da1786e9554ee68e32287c747fd88bee539d53 (patch) | |
| tree | 633aaff2e6b8add4c1941534aac66087b82e0aa9 | |
| parent | 0f5da3977e547914a6bc608be38d442565080198 (diff) | |
| download | openwrt-47da1786e9554ee68e32287c747fd88bee539d53.tar.gz openwrt-47da1786e9554ee68e32287c747fd88bee539d53.tar.bz2 openwrt-47da1786e9554ee68e32287c747fd88bee539d53.zip | |
ipq40xx: fix I2C pin config on Aruba AP-303H
Turn on SoC pull-ups on I2C pins, since there are no discrete pull-up
resistors on the bus.
Increase clock to 400 kHz. Both chips on the bus support 400 kHz. I
tested the ISL28022 at 4,000 reads/sec and didn't see any garbled output
or bus hangs, even with SoC drive strength reduced to 2 for the test.
Signed-off-by: Ryan Salsbury <ryanrs@gmail.com>
Link: https://github.com/openwrt/openwrt/pull/15334
Signed-off-by: Robert Marko <robimarko@gmail.com>
| -rw-r--r-- | target/linux/ipq40xx/files-6.6/arch/arm/boot/dts/qcom/qcom-ipq4029-ap-303h.dts | 43 |
1 files changed, 23 insertions, 20 deletions
diff --git a/target/linux/ipq40xx/files-6.6/arch/arm/boot/dts/qcom/qcom-ipq4029-ap-303h.dts b/target/linux/ipq40xx/files-6.6/arch/arm/boot/dts/qcom/qcom-ipq4029-ap-303h.dts index 0dec567bc4..69d4810277 100644 --- a/target/linux/ipq40xx/files-6.6/arch/arm/boot/dts/qcom/qcom-ipq4029-ap-303h.dts +++ b/target/linux/ipq40xx/files-6.6/arch/arm/boot/dts/qcom/qcom-ipq4029-ap-303h.dts @@ -71,25 +71,6 @@ watchdog@b017000 { status = "okay"; }; - - i2c_0: i2c@78b7000 { - pinctrl-0 = <&i2c_0_pins>; - pinctrl-names = "default"; - status = "okay"; - - tpm@29 { - /* No Driver */ - compatible = "atmel,at97sc3203"; - reg = <0x29>; - read-only; - }; - - power-monitor@40 { - /* No driver */ - compatible = "isl,isl28022"; - reg = <0x40>; - }; - }; }; leds { @@ -214,7 +195,7 @@ pins = "gpio20", "gpio21"; function = "blsp_i2c0"; drive-strength = <4>; - bias-disable; + bias-pull-up; }; }; @@ -242,6 +223,28 @@ }; }; +&blsp1_i2c3 { + pinctrl-0 = <&i2c_0_pins>; + pinctrl-names = "default"; + status = "okay"; + clock-frequency = <400000>; + + tpm@29 { + /* No Driver */ + compatible = "atmel,at97sc3203"; + reg = <0x29>; + read-only; + }; + + power-monitor@40 { + /* No driver */ + /* Device also replies on address 0x3f, see */ + /* ISL28022 datasheet, "Broadcast Addressing" */ + compatible = "isl,isl28022"; + reg = <0x40>; + }; +}; + &blsp1_spi1 { pinctrl-0 = <&spi_0_pins>; pinctrl-names = "default"; |