linux-kernel - [PATCH v3 1/3] drivers: serial: earlycon: Pass device-tree node

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Message-Id: <20221221105402.6598-2-markuss.broks@gmail.com>
Date:   Wed, 21 Dec 2022 12:53:58 +0200
From:   Markuss Broks <markuss.broks@...il.com>
To:     linux-kernel@...r.kernel.org
Cc:     Jami Kettunen <jami.kettunen@...tonmail.com>,
        Markuss Broks <markuss.broks@...il.com>,
        Jonathan Corbet <corbet@....net>,
        Ard Biesheuvel <ardb@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jiri Slaby <jirislaby@...nel.org>,
        Helge Deller <deller@....de>, Borislav Petkov <bp@...e.de>,
        "Paul E. McKenney" <paulmck@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Will Deacon <will@...nel.org>,
        Randy Dunlap <rdunlap@...radead.org>,
        Muchun Song <muchun.song@...ux.dev>,
        Damien Le Moal <damien.lemoal@...nsource.wdc.com>,
        Kim Phillips <kim.phillips@....com>, linux-doc@...r.kernel.org,
        linux-efi@...r.kernel.org, linux-serial@...r.kernel.org,
        linux-fbdev@...r.kernel.org, dri-devel@...ts.freedesktop.org
Subject: [PATCH v3 1/3] drivers: serial: earlycon: Pass device-tree node

Pass a pointer to device-tree node in case the driver probed from
OF. This makes early console drivers able to fetch options from
device-tree node properties.

Signed-off-by: Markuss Broks <markuss.broks@...il.com>
---
 drivers/tty/serial/earlycon.c | 3 +++
 include/linux/serial_core.h   | 1 +
 2 files changed, 4 insertions(+)

diff --git a/drivers/tty/serial/earlycon.c b/drivers/tty/serial/earlycon.c
index 4f6e9bf57169..0c7a789d7eb7 100644
--- a/drivers/tty/serial/earlycon.c
+++ b/drivers/tty/serial/earlycon.c
@@ -307,6 +307,9 @@ int __init of_setup_earlycon(const struct earlycon_id *match,
 		strscpy(early_console_dev.options, options,
 			sizeof(early_console_dev.options));
 	}
+
+	early_console_dev.node = node;
+
 	earlycon_init(&early_console_dev, match->name);
 	err = match->setup(&early_console_dev, options);
 	earlycon_print_info(&early_console_dev);
diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h
index fd59f600094a..0b06c0ee7705 100644
--- a/include/linux/serial_core.h
+++ b/include/linux/serial_core.h
@@ -783,6 +783,7 @@ struct earlycon_device {
 	struct uart_port port;
 	char options[16];		/* e.g., 115200n8 */
 	unsigned int baud;
+	unsigned long node;
 };
 
 struct earlycon_id {
-- 
2.39.0