From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from magratgarlick.emantor.de ([78.46.208.201] helo=margratgarlick.emantor.de) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1gYo04-0002B6-I5 for barebox@lists.infradead.org; Mon, 17 Dec 2018 08:11:42 +0000 From: Rouven Czerwinski Date: Mon, 17 Dec 2018 09:10:42 +0100 Message-Id: <1ce9b3de1464acae378eaaae5324b724d187f1a6.1545034218.git-series.r.czerwinski@pengutronix.de> In-Reply-To: References: MIME-Version: 1.0 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "barebox" Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: [PATCH v4 4/7] serial_ns16550: add raspberry pi compatible and init To: barebox@lists.infradead.org Cc: Rouven Czerwinski Add the compatible for the Raspberry Pi AUX UART and an init function which enables it via the aux register and configures the correct shift value. Signed-off-by: Rouven Czerwinski --- drivers/serial/serial_ns16550.c | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) diff --git a/drivers/serial/serial_ns16550.c b/drivers/serial/serial_ns16550.c index 8ddcfdb..256063a 100644 --- a/drivers/serial/serial_ns16550.c +++ b/drivers/serial/serial_ns16550.c @@ -253,6 +253,20 @@ static void ns16550_jz_init_port(struct console_device *cdev) ns16550_serial_init_port(cdev); } +static void rpi_init_port(struct console_device *cdev) +{ + struct ns16550_priv *priv = to_ns16550_priv(cdev); + + writeb(0x01, 0x3f215004); + priv->plat.shift = 2; + /* + * We double the clock rate since the 16550 will divide by 16 + * (instead of 8 required by the BCM2835 peripheral manual) + */ + priv->plat.clock = priv->plat.clock*2; + ns16550_serial_init_port(cdev); +} + /*********** Exposed Functions **********************************/ /** @@ -353,6 +367,11 @@ static __maybe_unused struct ns16550_drvdata tegra_drvdata = { .linux_console_name = "ttyS", }; +static __maybe_unused struct ns16550_drvdata rpi_drvdata = { + .init_port = rpi_init_port, + .linux_console_name = "ttyS", +}; + static int ns16550_init_iomem(struct device_d *dev, struct ns16550_priv *priv) { struct resource *iores; @@ -528,6 +547,12 @@ static struct of_device_id ns16550_serial_dt_ids[] = { .data = &jz_drvdata, }, #endif +#if IS_ENABLED(CONFIG_MACH_RPI_COMMON) + { + .compatible = "brcm,bcm2835-aux-uart", + .data = &rpi_drvdata, + }, +#endif { /* sentinel */ }, -- git-series 0.9.1 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox