From patchwork Tue Jul 5 15:05:38 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shawn Guo X-Patchwork-Id: 945622 Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) by demeter2.kernel.org (8.14.4/8.14.4) with ESMTP id p65F176K028686 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Tue, 5 Jul 2011 15:01:27 GMT Received: from canuck.infradead.org ([2001:4978:20e::1]) by merlin.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1Qe76k-0008Ir-6B; Tue, 05 Jul 2011 15:00:14 +0000 Received: from localhost ([127.0.0.1] helo=canuck.infradead.org) by canuck.infradead.org with esmtp (Exim 4.76 #1 (Red Hat Linux)) id 1Qe76h-0003tb-3J; Tue, 05 Jul 2011 15:00:11 +0000 Received: from db3ehsobe005.messaging.microsoft.com ([213.199.154.143] helo=DB3EHSOBE005.bigfish.com) by canuck.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1Qe762-0003lK-Mx for linux-arm-kernel@lists.infradead.org; Tue, 05 Jul 2011 14:59:32 +0000 Received: from mail77-db3-R.bigfish.com (10.3.81.249) by DB3EHSOBE005.bigfish.com (10.3.84.25) with Microsoft SMTP Server id 14.1.225.22; Tue, 5 Jul 2011 14:59:29 +0000 Received: from mail77-db3 (localhost.localdomain [127.0.0.1]) by mail77-db3-R.bigfish.com (Postfix) with ESMTP id A15C11C2010C; Tue, 5 Jul 2011 14:59:29 +0000 (UTC) X-SpamScore: 4 X-BigFish: VS4(zz8b9clzz1202hzz8275bh8275dhz2dh87h2a8h668h839h61h) X-Spam-TCS-SCL: 0:0 X-Forefront-Antispam-Report: CIP:70.37.183.190; KIP:(null); UIP:(null); IPVD:NLI; H:mail.freescale.net; RD:none; EFVD:NLI X-FB-DOMAIN-IP-MATCH: fail Received: from mail77-db3 (localhost.localdomain [127.0.0.1]) by mail77-db3 (MessageSwitch) id 1309877969276059_12066; Tue, 5 Jul 2011 14:59:29 +0000 (UTC) Received: from DB3EHSMHS017.bigfish.com (unknown [10.3.81.251]) by mail77-db3.bigfish.com (Postfix) with ESMTP id 3484258804F; Tue, 5 Jul 2011 14:59:29 +0000 (UTC) Received: from mail.freescale.net (70.37.183.190) by DB3EHSMHS017.bigfish.com (10.3.87.117) with Microsoft SMTP Server (TLS) id 14.1.225.22; Tue, 5 Jul 2011 14:59:27 +0000 Received: from az33smr02.freescale.net (10.64.34.200) by 039-SN1MMR1-001.039d.mgd.msft.net (10.84.1.13) with Microsoft SMTP Server id 14.1.289.8; Tue, 5 Jul 2011 09:59:26 -0500 Received: from S2100-06.ap.freescale.net (S2100-06.ap.freescale.net [10.192.242.125]) by az33smr02.freescale.net (8.13.1/8.13.0) with ESMTP id p65ExHrR026202; Tue, 5 Jul 2011 09:59:23 -0500 (CDT) From: Shawn Guo To: Subject: [PATCH v2 2/2] serial/imx: add device tree probe support Date: Tue, 5 Jul 2011 23:05:38 +0800 Message-ID: <1309878338-25697-3-git-send-email-shawn.guo@linaro.org> X-Mailer: git-send-email 1.7.4.1 In-Reply-To: <1309878338-25697-1-git-send-email-shawn.guo@linaro.org> References: <1309878338-25697-1-git-send-email-shawn.guo@linaro.org> MIME-Version: 1.0 X-OriginatorOrg: sigmatel.com X-CRM114-Version: 20090807-BlameThorstenAndJenny ( TRE 0.7.6 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20110705_105931_016719_AA8F87F1 X-CRM114-Status: GOOD ( 24.33 ) X-Spam-Score: -0.7 (/) X-Spam-Report: SpamAssassin version 3.3.1 on canuck.infradead.org summary: Content analysis details: (-0.7 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.7 RCVD_IN_DNSWL_LOW RBL: Sender listed at http://www.dnswl.org/, low trust [213.199.154.143 listed in list.dnswl.org] Cc: patches@linaro.org, devicetree-discuss@lists.ozlabs.org, Jason Liu , Grant Likely , Alan Cox , Jeremy Kerr , Shawn Guo , Sascha Hauer , linux-arm-kernel@lists.infradead.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: linux-arm-kernel-bounces@lists.infradead.org Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.6 (demeter2.kernel.org [140.211.167.43]); Tue, 05 Jul 2011 15:01:28 +0000 (UTC) It adds device tree probe support for imx tty/serial driver. Signed-off-by: Jeremy Kerr Signed-off-by: Jason Liu Signed-off-by: Shawn Guo Cc: Sascha Hauer Cc: Alan Cox Cc: Grant Likely Acked-by: Grant Likely --- .../bindings/tty/serial/fsl-imx-uart.txt | 19 +++++ drivers/tty/serial/imx.c | 85 +++++++++++++++++--- 2 files changed, 94 insertions(+), 10 deletions(-) create mode 100644 Documentation/devicetree/bindings/tty/serial/fsl-imx-uart.txt diff --git a/Documentation/devicetree/bindings/tty/serial/fsl-imx-uart.txt b/Documentation/devicetree/bindings/tty/serial/fsl-imx-uart.txt new file mode 100644 index 0000000..a9c0406 --- /dev/null +++ b/Documentation/devicetree/bindings/tty/serial/fsl-imx-uart.txt @@ -0,0 +1,19 @@ +* Freescale i.MX Universal Asynchronous Receiver/Transmitter (UART) + +Required properties: +- compatible : Should be "fsl,-uart" +- reg : Address and length of the register set for the device +- interrupts : Should contain uart interrupt + +Optional properties: +- fsl,uart-has-rtscts : Indicate the uart has rts and cts +- fsl,irda-mode : Indicate the uart supports irda mode + +Example: + +uart@73fbc000 { + compatible = "fsl,imx51-uart", "fsl,imx21-uart"; + reg = <0x73fbc000 0x4000>; + interrupts = <31>; + fsl,uart-has-rtscts; +}; diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c index ddebb5c..edafd1f 100644 --- a/drivers/tty/serial/imx.c +++ b/drivers/tty/serial/imx.c @@ -45,6 +45,8 @@ #include #include #include +#include +#include #include #include @@ -237,6 +239,12 @@ static struct platform_device_id imx_uart_devtype[] = { } }; +static struct of_device_id imx_uart_dt_ids[] = { + { .compatible = "fsl,imx1-uart", .data = &imx_uart_devdata[IMX1_UART], }, + { .compatible = "fsl,imx21-uart", .data = &imx_uart_devdata[IMX_UART], }, + { /* sentinel */ } +}; + /* * Handle any change of modem status signal since we were last called. */ @@ -1259,6 +1267,61 @@ static int serial_imx_resume(struct platform_device *dev) return 0; } +#ifdef CONFIG_OF +static int serial_imx_probe_dt(struct imx_port *sport, + struct platform_device *pdev) +{ + struct device_node *np = pdev->dev.of_node; + const struct of_device_id *of_id = + of_match_device(imx_uart_dt_ids, &pdev->dev); + + if (!np) + return -ENODEV; + + pdev->id = of_alias_get_id(np, "serial"); + if (pdev->id < 0) { + pr_err("%s: failed to get alias id, errno %d\n", + __func__, pdev->id); + return -ENODEV; + } + + if (of_get_property(np, "fsl,uart-has-rtscts", NULL)) + sport->have_rtscts = 1; + + if (of_get_property(np, "fsl,irda-mode", NULL)) + sport->use_irda = 1; + + sport->devdata = of_id->data; + + return 0; +} +#else +static inline int serial_imx_probe_dt(struct imx_port *sport, + struct platform_device *pdev) +{ + return -ENODEV; +} +#endif + +static int serial_imx_probe_pdata(struct imx_port *sport, + struct platform_device *pdev) +{ + struct imxuart_platform_data *pdata = pdev->dev.platform_data; + + if (!pdata) + return 0; + + if (pdata->flags & IMXUART_HAVE_RTSCTS) + sport->have_rtscts = 1; + + if (pdata->flags & IMXUART_IRDA) + sport->use_irda = 1; + + sport->devdata = (struct imx_uart_data *) pdev->id_entry->driver_data; + + return 0; +} + static int serial_imx_probe(struct platform_device *pdev) { struct imx_port *sport; @@ -1271,6 +1334,12 @@ static int serial_imx_probe(struct platform_device *pdev) if (!sport) return -ENOMEM; + ret = serial_imx_probe_dt(sport, pdev); + if (ret == -ENODEV) + ret = serial_imx_probe_pdata(sport, pdev); + if (ret) + goto free; + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!res) { ret = -ENODEV; @@ -1299,7 +1368,6 @@ static int serial_imx_probe(struct platform_device *pdev) init_timer(&sport->timer); sport->timer.function = imx_timeout; sport->timer.data = (unsigned long)sport; - sport->devdata = (struct imx_uart_data *) pdev->id_entry->driver_data; sport->clk = clk_get(&pdev->dev, "uart"); if (IS_ERR(sport->clk)) { @@ -1310,17 +1378,13 @@ static int serial_imx_probe(struct platform_device *pdev) sport->port.uartclk = clk_get_rate(sport->clk); - imx_ports[pdev->id] = sport; + if (imx_ports[sport->port.line]) { + ret = -EBUSY; + goto clkput; + } + imx_ports[sport->port.line] = sport; pdata = pdev->dev.platform_data; - if (pdata && (pdata->flags & IMXUART_HAVE_RTSCTS)) - sport->have_rtscts = 1; - -#ifdef CONFIG_IRDA - if (pdata && (pdata->flags & IMXUART_IRDA)) - sport->use_irda = 1; -#endif - if (pdata && pdata->init) { ret = pdata->init(pdev); if (ret) @@ -1382,6 +1446,7 @@ static struct platform_driver serial_imx_driver = { .driver = { .name = "imx-uart", .owner = THIS_MODULE, + .of_match_table = imx_uart_dt_ids, }, };