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ARM: rockchip: rk3188: enable pull-ups on UART RX pins 

The default behaviour of the uart-rx pins on the rk3188 is to be pulled up and
a lot of designs use diodes to even prevent them from being raised from the
outside.

Therefore change the rx-pin settings accordingly.

This also fixes a uart receive problem on mass production Radxa Rock boards.

Signed-off-by: Max Schwarz <max.schwarz@online.de>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
This commit is contained in:
Max Schwarz 2014-03-09 20:43:11 +01:00 committed by Heiko Stuebner
parent c9eaa447e7
commit 6faff9b6bd
1 changed files with 4 additions and 4 deletions
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8
arch/arm/boot/dts/rk3188.dtsi
View File

@ -149,7 +149,7 @@
uart0 {
uart0_xfer: uart0-xfer {
rockchip,pins = <RK_GPIO1 0 RK_FUNC_1 &pcfg_pull_none>,
rockchip,pins = <RK_GPIO1 0 RK_FUNC_1 &pcfg_pull_up>,
<RK_GPIO1 1 RK_FUNC_1 &pcfg_pull_none>;
};
@ -164,7 +164,7 @@
uart1 {
uart1_xfer: uart1-xfer {
rockchip,pins = <RK_GPIO1 4 RK_FUNC_1 &pcfg_pull_none>,
rockchip,pins = <RK_GPIO1 4 RK_FUNC_1 &pcfg_pull_up>,
<RK_GPIO1 5 RK_FUNC_1 &pcfg_pull_none>;
};
@ -179,7 +179,7 @@
uart2 {
uart2_xfer: uart2-xfer {
rockchip,pins = <RK_GPIO1 8 RK_FUNC_1 &pcfg_pull_none>,
rockchip,pins = <RK_GPIO1 8 RK_FUNC_1 &pcfg_pull_up>,
<RK_GPIO1 9 RK_FUNC_1 &pcfg_pull_none>;
};
/* no rts / cts for uart2 */
@ -187,7 +187,7 @@
uart3 {
uart3_xfer: uart3-xfer {
rockchip,pins = <RK_GPIO1 10 RK_FUNC_1 &pcfg_pull_none>,
rockchip,pins = <RK_GPIO1 10 RK_FUNC_1 &pcfg_pull_up>,
<RK_GPIO1 11 RK_FUNC_1 &pcfg_pull_none>;
};