From: Michael Orlitzky <michael@orlitzky.com>
To: unicorn_wang@outlook.com, inochiama@gmail.com
Cc: robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org,
pjw@kernel.org, palmer@dabbelt.com, aou@eecs.berkeley.edu,
alex@ghiti.fr, devicetree@vger.kernel.org,
sophgo@lists.linux.dev, linux-riscv@lists.infradead.org
Subject: [PATCH v2 1/1] riscv: dts: sophgo: enable hardware clock (RTC) on the Milk-V Pioneer
Date: Wed, 7 Jan 2026 06:29:22 -0500 [thread overview]
Message-ID: <20260107112922.20013-2-michael@orlitzky.com> (raw)
In-Reply-To: <20260107112922.20013-1-michael@orlitzky.com>
These boards have a working hardware clock if you put a CR-1220
battery in them. We enable it using information from a 6.1.x vendor
kernel.
Reviewed-by: Chen Wang <unicorn_wang@outlook.com>
Signed-off-by: Michael Orlitzky <michael@orlitzky.com>
---
.../boot/dts/sophgo/sg2042-milkv-pioneer.dts | 21 +++++++++++++++++++
1 file changed, 21 insertions(+)
diff --git a/arch/riscv/boot/dts/sophgo/sg2042-milkv-pioneer.dts b/arch/riscv/boot/dts/sophgo/sg2042-milkv-pioneer.dts
index 54d8386bf9c0..ecf8c1e29079 100644
--- a/arch/riscv/boot/dts/sophgo/sg2042-milkv-pioneer.dts
+++ b/arch/riscv/boot/dts/sophgo/sg2042-milkv-pioneer.dts
@@ -52,6 +52,17 @@ &emmc {
status = "okay";
};
+&i2c0 {
+ pinctrl-0 = <&i2c0_cfg>;
+ pinctrl-names = "default";
+ status = "okay";
+
+ rtc: rtc@68 {
+ compatible = "dallas,ds1307";
+ reg = <0x68>;
+ };
+};
+
&i2c1 {
pinctrl-0 = <&i2c1_cfg>;
pinctrl-names = "default";
@@ -89,6 +100,16 @@ sdhci-emmc-rst-pwr-pins {
};
};
+ i2c0_cfg: i2c0-cfg {
+ i2c0-pins {
+ pinmux = <PINMUX(PIN_IIC0_SDA, 0)>,
+ <PINMUX(PIN_IIC0_SCL, 0)>;
+ bias-pull-up;
+ drive-strength-microamp = <26800>;
+ input-schmitt-enable;
+ };
+ };
+
i2c1_cfg: i2c1-cfg {
i2c1-pins {
pinmux = <PINMUX(PIN_IIC1_SDA, 0)>,
--
2.52.0
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next prev parent reply other threads:[~2026-01-07 11:30 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-01-07 11:29 [PATCH v2 0/1] Enable hardware clock (RTC) on the Milk-V Pioneer Michael Orlitzky
2026-01-07 11:29 ` Michael Orlitzky [this message]
2026-01-12 6:18 ` [PATCH v2 1/1] riscv: dts: sophgo: enable " Chen Wang
2026-01-15 0:35 ` [PATCH v2 0/1] Enable " Inochi Amaoto
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