From: Stefan Eichenberger <eichest@gmail.com>
To: robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org,
shawnguo@kernel.org, s.hauer@pengutronix.de,
kernel@pengutronix.de, festevam@gmail.com,
francesco.dolcini@toradex.com
Cc: devicetree@vger.kernel.org, imx@lists.linux.dev,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org,
Stefan Eichenberger <stefan.eichenberger@toradex.com>
Subject: [PATCH v1 2/2] arm64: dts: imx8mp-verdin: add single-master property to all i2c nodes
Date: Fri, 25 Oct 2024 11:58:03 +0200 [thread overview]
Message-ID: <20241025095915.22313-3-eichest@gmail.com> (raw)
In-Reply-To: <20241025095915.22313-1-eichest@gmail.com>
From: Stefan Eichenberger <stefan.eichenberger@toradex.com>
By default we expect all i2c nodes to be single-master, we do not have
any module or carrier board that uses multi-master mode on any i2c
controller. With this property set, we benefit from optimisations made
exclusively for single-masters.
Signed-off-by: Stefan Eichenberger <stefan.eichenberger@toradex.com>
---
arch/arm64/boot/dts/freescale/imx8mp-verdin.dtsi | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/arch/arm64/boot/dts/freescale/imx8mp-verdin.dtsi b/arch/arm64/boot/dts/freescale/imx8mp-verdin.dtsi
index a19ad5ee7f792..323b45bac281e 100644
--- a/arch/arm64/boot/dts/freescale/imx8mp-verdin.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mp-verdin.dtsi
@@ -478,6 +478,7 @@ &i2c1 {
pinctrl-1 = <&pinctrl_i2c1_gpio>;
scl-gpios = <&gpio5 14 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
sda-gpios = <&gpio5 15 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
+ single-master;
status = "okay";
pca9450: pmic@25 {
@@ -669,6 +670,7 @@ &i2c2 {
pinctrl-1 = <&pinctrl_i2c2_gpio>;
scl-gpios = <&gpio5 16 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
sda-gpios = <&gpio5 17 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
+ single-master;
atmel_mxt_ts_mezzanine: touch-mezzanine@4a {
compatible = "atmel,maxtouch";
@@ -690,6 +692,7 @@ &i2c3 {
pinctrl-1 = <&pinctrl_i2c3_gpio>;
scl-gpios = <&gpio5 18 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
sda-gpios = <&gpio5 19 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
+ single-master;
};
/* Verdin I2C_1 */
@@ -700,6 +703,7 @@ &i2c4 {
pinctrl-1 = <&pinctrl_i2c4_gpio>;
scl-gpios = <&gpio5 20 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
sda-gpios = <&gpio5 21 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
+ single-master;
gpio_expander_21: gpio-expander@21 {
compatible = "nxp,pcal6416";
@@ -788,6 +792,7 @@ &i2c5 {
pinctrl-1 = <&pinctrl_i2c5_gpio>;
scl-gpios = <&gpio3 26 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
sda-gpios = <&gpio3 27 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
+ single-master;
};
/* Verdin PCIE_1 */
--
2.43.0
next prev parent reply other threads:[~2024-10-25 9:59 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-10-25 9:58 [PATCH v1 0/2] arm64: dts: imx8mm/imx8mp-verdin: add single-master property to all i2c nodes Stefan Eichenberger
2024-10-25 9:58 ` [PATCH v1 1/2] arm64: dts: imx8mm-verdin: " Stefan Eichenberger
2024-11-02 4:52 ` Shawn Guo
2024-11-02 14:31 ` Stefan Eichenberger
2024-11-03 8:56 ` Shawn Guo
2024-10-25 9:58 ` Stefan Eichenberger [this message]
2024-11-03 8:56 ` [PATCH v1 0/2] arm64: dts: imx8mm/imx8mp-verdin: " Shawn Guo
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