Attachment 247879 Details for Bug 276523 – ns8250: Try to get the clock-frequency property

[patch] ns8250: Try to get the clock-frequency property

0001-ns8250-Try-to-get-the-clock-frequency-property.patch (text/plain), 1.38 KB, created by Emmanuel Vadot on 2024-01-23 10:08:20 UTC

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Creator: Emmanuel Vadot

Created: 2024-01-23 10:08:20 UTC

Size: 1.38 KB

patch

obsolete

>From cb43cf2e57974129181df733cab499d9b3c85967 Mon Sep 17 00:00:00 2001
>From: Emmanuel Vadot <manu@FreeBSD.org>
>Date: Tue, 23 Jan 2024 11:03:13 +0100
>Subject: [PATCH] ns8250: Try to get the clock-frequency property
>Content-Type: text/plain; charset=UTF-8
>
>Not all the same hardware use the same base frequency.
>
>Both FDT and ACPI can have this property and device_get_propery will
>work for both.
>If the property isn't found we will fallback to the frequency specified
>in the compat_data.
>
>PR:	276523
>Sponsosred by:	Beckhoff Automation GmbH & Co. KG
>---
> sys/dev/uart/uart_dev_ns8250.c | 5 +++++
> 1 file changed, 5 insertions(+)
>
>diff --git a/sys/dev/uart/uart_dev_ns8250.c b/sys/dev/uart/uart_dev_ns8250.c
>index f211084cb013..4209c05e500c 100644
>--- a/sys/dev/uart/uart_dev_ns8250.c
>+++ b/sys/dev/uart/uart_dev_ns8250.c
>@@ -524,6 +524,7 @@ ns8250_bus_attach(struct uart_softc *sc)
> 	struct ns8250_softc *ns8250 = (struct ns8250_softc*)sc;
> 	struct uart_bas *bas;
> 	unsigned int ivar;
>+	uint32_t clock_freq;
> #ifdef FDT
> 	phandle_t node;
> 	pcell_t cell;
>@@ -538,6 +539,10 @@ ns8250_bus_attach(struct uart_softc *sc)
> 
> 	bas = &sc->sc_bas;
> 
>+	if (device_get_property(sc->sc_dev, "clock-frequency", &clock_freq,
>+	    sizeof(clock_freq), DEVICE_PROP_UINT32) > 0)
>+		bas->rclk = clock_freq;
>+
> 	ns8250->busy_detect = bas->busy_detect;
> 	ns8250->mcr = uart_getreg(bas, REG_MCR);
> 	ns8250->fcr = FCR_ENABLE;
>-- 
>2.43.0
>

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Attachments on bug 276523: 247841 | 247847 | 247848 | 247879 | 247889 | 247917