ARM: dts: am437x-gp-evm: Add uart0 pinctrl default and sleep states

Currently uart0 uses pinctrl config set by bootloader so
create default state that can be restored after a suspend
event.

Also, modify uart0 pinctrl to include RTS and CTS pins as by
default these are not in a mode for optimal power savings.

Signed-off-by: Dave Gerlach <d-gerlach@ti.com>
Signed-off-by: Keerthy <j-keerthy@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

diff --git a/arch/arm/boot/dts/am437x-gp-evm.dts b/arch/arm/boot/dts/am437x-gp-evm.dts
index 9c5e969d05e6cbd05f7900ae71bf2deb0616f15e..e52b0132d43cde5abb5ead54872f8bd13afd6002 100644 (file)
--- a/arch/arm/boot/dts/am437x-gp-evm.dts
+++ b/arch/arm/boot/dts/am437x-gp-evm.dts
@@ -517,15 +517,6 @@ AM4372_IOPAD(0x884, PIN_INPUT_PULLDOWN | MUX_MODE7) /* gpmc_csn2.gpio1_31 */
                >;
        };
 
-       uart0_pins_default: uart0_pins_default {
-               pinctrl-single,pins = <
-                       AM4372_IOPAD(0x968, PIN_INPUT | MUX_MODE0)              /* uart0_ctsn.uart0_ctsn */
-                       AM4372_IOPAD(0x96C, PIN_OUTPUT_PULLDOWN | MUX_MODE0)    /* uart0_rtsn.uart0_rtsn */
-                       AM4372_IOPAD(0x970, PIN_INPUT_PULLUP | MUX_MODE0)       /* uart0_rxd.uart0_rxd */
-                       AM4372_IOPAD(0x974, PIN_OUTPUT_PULLDOWN | MUX_MODE0)    /* uart0_txd.uart0_txd */
-               >;
-       };
-
        beeper_pins: beeper_pins {
                pinctrl-single,pins = <
                        AM4372_IOPAD(0x9e0, PIN_OUTPUT_PULLUP | MUX_MODE7)      /* cam1_field.gpio4_12 */
@@ -592,12 +583,31 @@ AM4372_IOPAD(0xaa4, PIN_INPUT_PULLDOWN)
                        AM4372_IOPAD(0xaa8, PIN_INPUT_PULLDOWN)
                >;
        };
+
+       uart0_pins_default: uart0_pins_default {
+               pinctrl-single,pins = <
+                       AM4372_IOPAD(0x968, DS0_PULL_UP_DOWN_EN | INPUT_EN | MUX_MODE0) /* uart0_ctsn.uart0_ctsn */
+                       AM4372_IOPAD(0x96C, DS0_PULL_UP_DOWN_EN | INPUT_EN | MUX_MODE0) /* uart0_rtsn.uart0_rtsn */
+                       AM4372_IOPAD(0x970, PIN_INPUT_PULLUP | SLEWCTRL_FAST | DS0_PULL_UP_DOWN_EN | MUX_MODE0) /* uart0_rxd.uart0_rxd */
+                       AM4372_IOPAD(0x974, PIN_INPUT | PULL_DISABLE | SLEWCTRL_FAST | DS0_PULL_UP_DOWN_EN | MUX_MODE0) /* uart0_txd.uart0_txd */
+               >;
+       };
+
+       uart0_pins_sleep: uart0_pins_sleep {
+               pinctrl-single,pins = <
+                       AM4372_IOPAD(0x968, DS0_PULL_UP_DOWN_EN | INPUT_EN | MUX_MODE7) /* uart0_ctsn.uart0_ctsn */
+                       AM4372_IOPAD(0x96C, DS0_PULL_UP_DOWN_EN | INPUT_EN | MUX_MODE7) /* uart0_rtsn.uart0_rtsn */
+                       AM4372_IOPAD(0x970, PIN_INPUT_PULLUP | SLEWCTRL_FAST | DS0_PULL_UP_DOWN_EN | MUX_MODE0) /* uart0_rxd.uart0_rxd */
+                       AM4372_IOPAD(0x974, PIN_INPUT_PULLDOWN | SLEWCTRL_FAST | DS0_PULL_UP_DOWN_EN | MUX_MODE0) /* uart0_txd.uart0_txd */
+               >;
+       };
 };
 
 &uart0 {
        status = "okay";
-       pinctrl-names = "default";
+       pinctrl-names = "default", "sleep";
        pinctrl-0 = <&uart0_pins_default>;
+       pinctrl-1 = <&uart0_pins_sleep>;
 };
 
 &i2c0 {