提交 ec8542cb 编写于 作者: B Baruch Siach 提交者: Eric Anholt

ARM: dts: bcm2835: fix uart0 pinctrl node names

Downstream kernel uses pins 32, 33 as UART0 (PL011) Rx/Tx to communicate with
the Bluetooth chip. So ALT3 of these pins is most likely not CTS/RTS. Change
the node name to reflect that. This matches section 6.2 "Alternative Function
Assignments" in the BCM2835 ARM Peripherals document.

With this change in place, adding

  &uart0 {
	 pinctrl-names = "default";
	 pinctrl-0 = <&uart0_gpio32 &gpclk2_gpio43>;
	 status = "okay";
  };

to bcm2837-rpi-3-b.dts does the right thing on my Raspberry Pi 3.

Pins 30, 31 are CTS/RTS of UART0 in alternate function 3. Rename uart0_gpio30
as well.

While at it, fix a little typo in a nearby comment.

Fixes: 21ff8439 ("ARM: dts: bcm283x: Define standard pinctrl groups in the gpio node.")
Acked-by: NStefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: NBaruch Siach <baruch@tkos.co.il>
Reviewed-by: NEric Anholt <eric@anholt.net>
上级 7f31a955
...@@ -295,17 +295,17 @@ ...@@ -295,17 +295,17 @@
/* Separate from the uart0_gpio14 group /* Separate from the uart0_gpio14 group
* because it conflicts with spi1_gpio16, and * because it conflicts with spi1_gpio16, and
* people often run uart0 on the two pins * people often run uart0 on the two pins
* without flow contrl. * without flow control.
*/ */
uart0_ctsrts_gpio16: uart0_ctsrts_gpio16 { uart0_ctsrts_gpio16: uart0_ctsrts_gpio16 {
brcm,pins = <16 17>; brcm,pins = <16 17>;
brcm,function = <BCM2835_FSEL_ALT3>; brcm,function = <BCM2835_FSEL_ALT3>;
}; };
uart0_gpio30: uart0_gpio30 { uart0_ctsrts_gpio30: uart0_ctsrts_gpio30 {
brcm,pins = <30 31>; brcm,pins = <30 31>;
brcm,function = <BCM2835_FSEL_ALT3>; brcm,function = <BCM2835_FSEL_ALT3>;
}; };
uart0_ctsrts_gpio32: uart0_ctsrts_gpio32 { uart0_gpio32: uart0_gpio32 {
brcm,pins = <32 33>; brcm,pins = <32 33>;
brcm,function = <BCM2835_FSEL_ALT3>; brcm,function = <BCM2835_FSEL_ALT3>;
}; };
......
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