mirrors/linux
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2026-05-04 10:56:06 -04:00
Code Issues Packages Projects Releases Wiki Activity

ARM: dts: at91: sama7g5ek: use proper slew-rate settings for GMACs

Browse Source 
Datasheet chapter "EMAC Timings" specifies that while in 3.3V domain
GMAC's MDIO pins should be configured with slew-rate enabled, while the
data + signaling pins should be configured with slew-rate disabled when
GMAC works in RGMII or RMII modes. The pin controller for SAMA7G5 sets
the slew-rate as enabled for all pins. Adapt the device tree to comply
with these.

Fixes: 7540629e2f ("ARM: dts: at91: add sama7g5 SoC DT and sama7g5-ek")
Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Link: https://lore.kernel.org/r/20210915074836.6574-2-claudiu.beznea@microchip.com
This commit is contained in:
Claudiu Beznea
2021-09-15 10:48:35 +03:00
committed by Nicolas Ferre
parent d8d667ee02
commit 968f6e9d51
1 changed files with 22 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files

28
arch/arm/boot/dts/at91-sama7g5ek.dts
View File

@@ -355,7 +355,10 @@ &gmac0 {
#address-cells = <1>;
#size-cells = <0>;
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_gmac0_default &pinctrl_gmac0_txck_default &pinctrl_gmac0_phy_irq>;
pinctrl-0 = <&pinctrl_gmac0_default
&pinctrl_gmac0_mdio_default
&pinctrl_gmac0_txck_default
&pinctrl_gmac0_phy_irq>;
phy-mode = "rgmii-id";
status = "okay";
@@ -370,7 +373,9 @@ &gmac1 {
#address-cells = <1>;
#size-cells = <0>;
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_gmac1_default &pinctrl_gmac1_phy_irq>;
pinctrl-0 = <&pinctrl_gmac1_default
&pinctrl_gmac1_mdio_default
&pinctrl_gmac1_phy_irq>;
phy-mode = "rmii";
status = "okay";
@@ -425,14 +430,20 @@ pinctrl_gmac0_default: gmac0_default {
<PIN_PA15__G0_TXEN>,
<PIN_PA30__G0_RXCK>,
<PIN_PA18__G0_RXDV>,
<PIN_PA22__G0_MDC>,
<PIN_PA23__G0_MDIO>,
<PIN_PA25__G0_125CK>;
slew-rate = <0>;
bias-disable;
};
pinctrl_gmac0_mdio_default: gmac0_mdio_default {
pinmux = <PIN_PA22__G0_MDC>,
<PIN_PA23__G0_MDIO>;
bias-disable;
};
pinctrl_gmac0_txck_default: gmac0_txck_default {
pinmux = <PIN_PA24__G0_TXCK>;
slew-rate = <0>;
bias-pull-up;
};
@@ -449,8 +460,13 @@ pinctrl_gmac1_default: gmac1_default {
<PIN_PD25__G1_RX0>,
<PIN_PD26__G1_RX1>,
<PIN_PD27__G1_RXER>,
<PIN_PD24__G1_RXDV>,
<PIN_PD28__G1_MDC>,
<PIN_PD24__G1_RXDV>;
slew-rate = <0>;
bias-disable;
};
pinctrl_gmac1_mdio_default: gmac1_mdio_default {
pinmux = <PIN_PD28__G1_MDC>,
<PIN_PD29__G1_MDIO>;
bias-disable;
};