69 lines
2.2 KiB
Diff
69 lines
2.2 KiB
Diff
From c2447aa922068cebd9bbaac45acae3d853abf687 Mon Sep 17 00:00:00 2001
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Message-Id: <c2447aa922068cebd9bbaac45acae3d853abf687.1650924333.git.stefan@agner.ch>
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In-Reply-To: <78704bc154d695ee16fdf8396f4d60b740190014.1650924333.git.stefan@agner.ch>
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References: <78704bc154d695ee16fdf8396f4d60b740190014.1650924333.git.stefan@agner.ch>
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From: Stefan Agner <stefan@agner.ch>
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Date: Thu, 14 Apr 2022 12:18:41 +0200
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Subject: [PATCH 2/5] drivers: bcm283x: allow to spawn any PL011 UART
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The current code checks pinmux for the first PL011 only. Raspberry Pi 4
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has multiple PL011 UARTs. This code prevents probing of other UARTs in
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case the first PL011 UART is not active.
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Furthermore, U-Boot supports pinmuxing, hence the pins should be muxed
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at this point anyway. Drop the check entirly.
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This allows to use other UARTs as stdout paths (e.g. stdout-path =
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"serial5:115200n8").
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Signed-off-by: Stefan Agner <stefan@agner.ch>
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---
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drivers/serial/serial_bcm283x_pl011.c | 27 ---------------------------
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1 file changed, 27 deletions(-)
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diff --git a/drivers/serial/serial_bcm283x_pl011.c b/drivers/serial/serial_bcm283x_pl011.c
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index 182274036c..98628e1ca4 100644
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--- a/drivers/serial/serial_bcm283x_pl011.c
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+++ b/drivers/serial/serial_bcm283x_pl011.c
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@@ -11,37 +11,10 @@
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#include <serial.h>
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#include "serial_pl01x_internal.h"
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-/*
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- * Check if this serial device is muxed
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- *
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- * The serial device will only work properly if it has been muxed to the serial
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- * pins by firmware. Check whether that happened here.
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- *
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- * @return true if serial device is muxed, false if not
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- */
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-static bool bcm283x_is_serial_muxed(void)
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-{
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- int serial_gpio = 15;
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- struct udevice *dev;
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-
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- if (uclass_first_device(UCLASS_PINCTRL, &dev) || !dev)
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- return false;
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-
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- if (pinctrl_get_gpio_mux(dev, 0, serial_gpio) != BCM2835_GPIO_ALT0)
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- return false;
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-
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- return true;
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-}
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-
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static int bcm283x_pl011_serial_probe(struct udevice *dev)
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{
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- struct pl01x_serial_plat *plat = dev_get_plat(dev);
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int ret;
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- /* Don't spawn the device if it's not muxed */
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- if (!bcm283x_is_serial_muxed())
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- return -ENODEV;
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-
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/*
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* Read the ofdata here rather than in an of_to_plat() method
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* since we need the soc simple-bus to be probed so that the 'ranges'
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--
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2.36.0
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