All of lore.kernel.org
 help / color / mirror / Atom feed
From: matthias.bgg@kernel.org
To: gregkh@linuxfoundation.org, jslaby@suse.com, nsaenzjulienne@suse.de
Cc: linux-kernel@vger.kernel.org, linux-serial@vger.kernel.org,
	linux-rpi-kernel@lists.infradead.org,
	linux-arm-kernel@lists.infradead.org, matthias.bgg@kernel.org,
	Matthias Brugger <mbrugger@suse.com>,
	Florian Fainelli <f.fainelli@gmail.com>,
	Ray Jui <rjui@broadcom.com>,
	Scott Branden <sbranden@broadcom.com>,
	Stephen Boyd <swboyd@chromium.org>,
	bcm-kernel-feedback-list@broadcom.com
Subject: [PATCH] serial: 8250_early: Add earlycon for BCM2835 aux uart
Date: Sun, 26 Jan 2020 13:33:14 +0100	[thread overview]
Message-ID: <20200126123314.3558-1-matthias.bgg@kernel.org> (raw)

From: Matthias Brugger <mbrugger@suse.com>

Define the OF early console for BCM2835 aux UART, which can be enabled
by passing "earlycon" on the boot command line. This UART is found on
BCM283x and BCM27xx SoCs, a.k.a. Raspberry Pi in its variants.

Signed-off-by: Matthias Brugger <mbrugger@suse.com>

---

 drivers/tty/serial/8250/8250_bcm2835aux.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/drivers/tty/serial/8250/8250_bcm2835aux.c b/drivers/tty/serial/8250/8250_bcm2835aux.c
index 8ce700c1a7fc..6769cea2964a 100644
--- a/drivers/tty/serial/8250/8250_bcm2835aux.c
+++ b/drivers/tty/serial/8250/8250_bcm2835aux.c
@@ -135,6 +135,24 @@ static struct platform_driver bcm2835aux_serial_driver = {
 };
 module_platform_driver(bcm2835aux_serial_driver);
 
+#ifdef CONFIG_SERIAL_8250_CONSOLE
+
+static int __init early_bcm2835aux_setup(struct earlycon_device *device,
+					const char *options)
+{
+	if (!device->port.membase)
+		return -ENODEV;
+
+	device->port.iotype = UPIO_MEM32;
+	device->port.regshift = 2;
+
+	return early_serial8250_setup(device, NULL);
+}
+
+OF_EARLYCON_DECLARE(bcm2835aux, "brcm,bcm2835-aux-uart",
+		    early_bcm2835aux_setup);
+#endif
+
 MODULE_DESCRIPTION("BCM2835 auxiliar UART driver");
 MODULE_AUTHOR("Martin Sperl <kernel@martin.sperl.org>");
 MODULE_LICENSE("GPL v2");
-- 
2.24.1


WARNING: multiple messages have this Message-ID (diff)
From: matthias.bgg@kernel.org
To: gregkh@linuxfoundation.org, jslaby@suse.com, nsaenzjulienne@suse.de
Cc: Matthias Brugger <mbrugger@suse.com>,
	Scott Branden <sbranden@broadcom.com>,
	Ray Jui <rjui@broadcom.com>,
	linux-kernel@vger.kernel.org, Stephen Boyd <swboyd@chromium.org>,
	Florian Fainelli <f.fainelli@gmail.com>,
	bcm-kernel-feedback-list@broadcom.com,
	linux-rpi-kernel@lists.infradead.org,
	linux-serial@vger.kernel.org, matthias.bgg@kernel.org,
	linux-arm-kernel@lists.infradead.org
Subject: [PATCH] serial: 8250_early: Add earlycon for BCM2835 aux uart
Date: Sun, 26 Jan 2020 13:33:14 +0100	[thread overview]
Message-ID: <20200126123314.3558-1-matthias.bgg@kernel.org> (raw)

From: Matthias Brugger <mbrugger@suse.com>

Define the OF early console for BCM2835 aux UART, which can be enabled
by passing "earlycon" on the boot command line. This UART is found on
BCM283x and BCM27xx SoCs, a.k.a. Raspberry Pi in its variants.

Signed-off-by: Matthias Brugger <mbrugger@suse.com>

---

 drivers/tty/serial/8250/8250_bcm2835aux.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/drivers/tty/serial/8250/8250_bcm2835aux.c b/drivers/tty/serial/8250/8250_bcm2835aux.c
index 8ce700c1a7fc..6769cea2964a 100644
--- a/drivers/tty/serial/8250/8250_bcm2835aux.c
+++ b/drivers/tty/serial/8250/8250_bcm2835aux.c
@@ -135,6 +135,24 @@ static struct platform_driver bcm2835aux_serial_driver = {
 };
 module_platform_driver(bcm2835aux_serial_driver);
 
+#ifdef CONFIG_SERIAL_8250_CONSOLE
+
+static int __init early_bcm2835aux_setup(struct earlycon_device *device,
+					const char *options)
+{
+	if (!device->port.membase)
+		return -ENODEV;
+
+	device->port.iotype = UPIO_MEM32;
+	device->port.regshift = 2;
+
+	return early_serial8250_setup(device, NULL);
+}
+
+OF_EARLYCON_DECLARE(bcm2835aux, "brcm,bcm2835-aux-uart",
+		    early_bcm2835aux_setup);
+#endif
+
 MODULE_DESCRIPTION("BCM2835 auxiliar UART driver");
 MODULE_AUTHOR("Martin Sperl <kernel@martin.sperl.org>");
 MODULE_LICENSE("GPL v2");
-- 
2.24.1


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

             reply	other threads:[~2020-01-26 12:33 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-01-26 12:33 matthias.bgg [this message]
2020-01-26 12:33 ` [PATCH] serial: 8250_early: Add earlycon for BCM2835 aux uart matthias.bgg
2020-01-26 13:12 ` Lukas Wunner
2020-01-26 20:20   ` Matthias Brugger
2020-01-26 20:20     ` Matthias Brugger
2020-01-28 12:42     ` Nicolas Saenz Julienne
2020-01-28 12:42       ` Nicolas Saenz Julienne
2020-01-28 14:19       ` Lukas Wunner
2020-01-30 16:11         ` Nicolas Saenz Julienne
2020-01-30 16:11           ` Nicolas Saenz Julienne
2020-01-31 15:24           ` Lukas Wunner
2020-02-03 19:10             ` Nicolas Saenz Julienne
2020-02-03 19:10               ` Nicolas Saenz Julienne
2020-02-12 13:28               ` Lukas Wunner
2020-02-12 15:18                 ` Matthias Brugger
2020-02-12 15:18                   ` Matthias Brugger

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20200126123314.3558-1-matthias.bgg@kernel.org \
    --to=matthias.bgg@kernel.org \
    --cc=bcm-kernel-feedback-list@broadcom.com \
    --cc=f.fainelli@gmail.com \
    --cc=gregkh@linuxfoundation.org \
    --cc=jslaby@suse.com \
    --cc=linux-arm-kernel@lists.infradead.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-rpi-kernel@lists.infradead.org \
    --cc=linux-serial@vger.kernel.org \
    --cc=mbrugger@suse.com \
    --cc=nsaenzjulienne@suse.de \
    --cc=rjui@broadcom.com \
    --cc=sbranden@broadcom.com \
    --cc=swboyd@chromium.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.