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ARM i.MX53: Fix UART pad configuration

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The current default pad configuration for UART RX and TX pads sets a 360k
pull-down and writes 1 to a reserved bit (1 << 0). It doesn't seem right to
me that in idle state, the UART has to keep the signal high against a
pull-down resistor.

This patch instead sets a 100k pull-up, which incidentally corresponds to the
register reset value for all but one (MX53_PAD_KEY_ROW0__UART4_RXD_MUX) pad,
and removes the write to the reserved bit.

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
This commit is contained in:
Philipp Zabel 2013-06-21 15:36:11 +02:00 committed by Shawn Guo
parent ad81f0545e
commit f5786b8e93
1 changed files with 16 additions and 16 deletions
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32
arch/arm/boot/dts/imx53.dtsi
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@ -725,15 +725,15 @@
uart1 {
pinctrl_uart1_1: uart1grp-1 {
fsl,pins = <
MX53_PAD_CSI0_DAT10__UART1_TXD_MUX 0x1c5
MX53_PAD_CSI0_DAT11__UART1_RXD_MUX 0x1c5
MX53_PAD_CSI0_DAT10__UART1_TXD_MUX 0x1e4
MX53_PAD_CSI0_DAT11__UART1_RXD_MUX 0x1e4
>;
};
pinctrl_uart1_2: uart1grp-2 {
fsl,pins = <
MX53_PAD_PATA_DIOW__UART1_TXD_MUX 0x1c5
MX53_PAD_PATA_DMACK__UART1_RXD_MUX 0x1c5
MX53_PAD_PATA_DIOW__UART1_TXD_MUX 0x1e4
MX53_PAD_PATA_DMACK__UART1_RXD_MUX 0x1e4
>;
};
@ -748,8 +748,8 @@
uart2 {
pinctrl_uart2_1: uart2grp-1 {
fsl,pins = <
MX53_PAD_PATA_BUFFER_EN__UART2_RXD_MUX 0x1c5
MX53_PAD_PATA_DMARQ__UART2_TXD_MUX 0x1c5
MX53_PAD_PATA_BUFFER_EN__UART2_RXD_MUX 0x1e4
MX53_PAD_PATA_DMARQ__UART2_TXD_MUX 0x1e4
>;
};
@ -766,17 +766,17 @@
uart3 {
pinctrl_uart3_1: uart3grp-1 {
fsl,pins = <
MX53_PAD_PATA_CS_0__UART3_TXD_MUX 0x1c5
MX53_PAD_PATA_CS_1__UART3_RXD_MUX 0x1c5
MX53_PAD_PATA_DA_1__UART3_CTS 0x1c5
MX53_PAD_PATA_DA_2__UART3_RTS 0x1c5
MX53_PAD_PATA_CS_0__UART3_TXD_MUX 0x1e4
MX53_PAD_PATA_CS_1__UART3_RXD_MUX 0x1e4
MX53_PAD_PATA_DA_1__UART3_CTS 0x1e4
MX53_PAD_PATA_DA_2__UART3_RTS 0x1e4
>;
};
pinctrl_uart3_2: uart3grp-2 {
fsl,pins = <
MX53_PAD_PATA_CS_0__UART3_TXD_MUX 0x1c5
MX53_PAD_PATA_CS_1__UART3_RXD_MUX 0x1c5
MX53_PAD_PATA_CS_0__UART3_TXD_MUX 0x1e4
MX53_PAD_PATA_CS_1__UART3_RXD_MUX 0x1e4
>;
};
@ -785,8 +785,8 @@
uart4 {
pinctrl_uart4_1: uart4grp-1 {
fsl,pins = <
MX53_PAD_KEY_COL0__UART4_TXD_MUX 0x1c5
MX53_PAD_KEY_ROW0__UART4_RXD_MUX 0x1c5
MX53_PAD_KEY_COL0__UART4_TXD_MUX 0x1e4
MX53_PAD_KEY_ROW0__UART4_RXD_MUX 0x1e4
>;
};
};
@ -794,8 +794,8 @@
uart5 {
pinctrl_uart5_1: uart5grp-1 {
fsl,pins = <
MX53_PAD_KEY_COL1__UART5_TXD_MUX 0x1c5
MX53_PAD_KEY_ROW1__UART5_RXD_MUX 0x1c5
MX53_PAD_KEY_COL1__UART5_TXD_MUX 0x1e4
MX53_PAD_KEY_ROW1__UART5_RXD_MUX 0x1e4
>;
};
};