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ARM: dts: omap4-droid4: Configure uart1 pins

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These are needed to use the n_gsm driver for TS 27.010 UART
multiplexing. Note that support for the OOB wake gpio is still
missing so the UART is not yet usable for n_gsm.

Signed-off-by: Tony Lindgren <tony@atomide.com>
This commit is contained in:
Tony Lindgren 2018-03-20 08:13:38 -07:00
parent e5b9fd7bde
commit 984c7706ff
1 changed files with 33 additions and 0 deletions
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33
arch/arm/boot/dts/omap4-droid4-xt894.dts
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@ -553,6 +553,28 @@ OMAP4_IOPAD(0x1c8, PIN_INPUT_PULLUP | MUX_MODE7)
>;
};
/*
* Note that the v3.0.8 stock userspace dynamically remuxes uart1
* rts pin probably for PM purposes to PIN_INPUT_PULLUP | MUX_MODE7
* when not used. If needed, we can add rts pin remux later based
* on power measurements.
*/
uart1_pins: pinmux_uart1_pins {
pinctrl-single,pins = <
/* 0x4a10013c mcspi1_cs2.uart1_cts ag23 */
OMAP4_IOPAD(0x13c, PIN_INPUT_PULLUP | MUX_MODE1)
/* 0x4a10013e mcspi1_cs3.uart1_rts ah23 */
OMAP4_IOPAD(0x13e, MUX_MODE1)
/* 0x4a100140 uart3_cts_rctx.uart1_tx f27 */
OMAP4_IOPAD(0x140, PIN_OUTPUT | MUX_MODE1)
/* 0x4a1001ca dpm_emu14.uart1_rx aa3 */
OMAP4_IOPAD(0x1ca, PIN_INPUT_PULLUP | MUX_MODE2)
>;
};
/* uart3_tx_irtx and uart3_rx_irrx */
uart3_pins: pinmux_uart3_pins {
pinctrl-single,pins = <
@ -622,6 +644,17 @@ OMAP4_IOPAD(0X1d0, PIN_OUTPUT | MUX_MODE1) /* dmtimer9_pwm_evt (gpio_28) */
};
};
/*
* As uart1 is wired to mdm6600 with rts and cts, we can use the cts pin for
* uart1 wakeirq.
*/
&uart1 {
pinctrl-names = "default";
pinctrl-0 = <&uart1_pins>;
interrupts-extended = <&wakeupgen GIC_SPI 72 IRQ_TYPE_LEVEL_HIGH
&omap4_pmx_core 0xfc>;
};
&uart3 {
interrupts-extended = <&wakeupgen GIC_SPI 74 IRQ_TYPE_LEVEL_HIGH
&omap4_pmx_core 0x17c>;