From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from metis.ext.pengutronix.de ([2001:6f8:1178:4:290:27ff:fe1d:cc33]) by merlin.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1UejKd-0005Mb-66 for barebox@lists.infradead.org; Tue, 21 May 2013 09:58:14 +0000 From: Sascha Hauer Date: Tue, 21 May 2013 11:57:39 +0200 Message-Id: <1369130267-8094-3-git-send-email-s.hauer@pengutronix.de> In-Reply-To: <1369130267-8094-1-git-send-email-s.hauer@pengutronix.de> References: <1369130267-8094-1-git-send-email-s.hauer@pengutronix.de> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 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 02/10] ARM: i.MX: iim: Add devicetree probe support To: barebox@lists.infradead.org Only adds the dt ids. Signed-off-by: Sascha Hauer --- Documentation/devicetree/bindings/README | 6 +++ .../devicetree/bindings/misc/fsl,imx-iim.txt | 20 ++++++++ arch/arm/mach-imx/iim.c | 58 ++++++++++++++++++++++ 3 files changed, 84 insertions(+) create mode 100644 Documentation/devicetree/bindings/README create mode 100644 Documentation/devicetree/bindings/misc/fsl,imx-iim.txt diff --git a/Documentation/devicetree/bindings/README b/Documentation/devicetree/bindings/README new file mode 100644 index 0000000..b818ee8 --- /dev/null +++ b/Documentation/devicetree/bindings/README @@ -0,0 +1,6 @@ + +barebox uses the same devicetree bindings as the kernel. For +the bindings derived from the kernel look in the kernel sources +for reference. + +barebox specific bindings are documented here. diff --git a/Documentation/devicetree/bindings/misc/fsl,imx-iim.txt b/Documentation/devicetree/bindings/misc/fsl,imx-iim.txt new file mode 100644 index 0000000..ed3efcc --- /dev/null +++ b/Documentation/devicetree/bindings/misc/fsl,imx-iim.txt @@ -0,0 +1,20 @@ +Freescale i.MX IIM (Ic Identification Module) + +Required properties: + +- compatible: fsl,imx-iim +- reg: physical register base and size + +Optional properties: + +- barebox,provide-mac-address: Provide MAC addresses for ethernet devices. This + can be multiple entries in the form <&phandle bankno fuseofs> to specify a MAC + address to a ethernet device. + +Example: + +iim: iim@83f98000 { + compatible = "fsl,imx51-iim", "fsl,imx-iim"; + reg = <0x83f98000 0x4000>; + barebox,provide-mac-address = <&fec 1 9>; +}; diff --git a/arch/arm/mach-imx/iim.c b/arch/arm/mach-imx/iim.c index bb806d7..956811c 100644 --- a/arch/arm/mach-imx/iim.c +++ b/arch/arm/mach-imx/iim.c @@ -223,6 +223,54 @@ static int imx_iim_add_bank(struct device_d *dev, void __iomem *base, int num) return devfs_create(cdev); } +#if IS_ENABLED(CONFIG_OFDEVICE) + +/* + * a single MAC address reference has the form + * <&phandle iim-bank-no offset>, so three cells + */ +#define MAC_ADDRESS_PROPLEN (3 * sizeof(__be32)) + +static void imx_iim_init_dt(struct device_d *dev) +{ + char mac[6]; + const __be32 *prop; + struct device_node *node = dev->device_node; + int len, ret; + + if (!node) + return; + + prop = of_get_property(node, "barebox,provide-mac-address", &len); + if (!prop) + return; + + while (len >= MAC_ADDRESS_PROPLEN) { + struct device_node *rnode; + uint32_t phandle, bank, offset; + + phandle = be32_to_cpup(prop++); + + rnode = of_find_node_by_phandle(phandle); + bank = be32_to_cpup(prop++); + offset = be32_to_cpup(prop++); + + ret = imx_iim_read(bank, offset, mac, 6); + if (ret == 6) { + of_eth_register_ethaddr(rnode, mac); + } else { + dev_err(dev, "cannot read: %s\n", strerror(-ret)); + } + + len -= MAC_ADDRESS_PROPLEN; + } +} +#else +static inline void imx_iim_init_dt(struct device_d *dev) +{ +} +#endif + static int imx_iim_probe(struct device_d *dev) { int i; @@ -234,6 +282,7 @@ static int imx_iim_probe(struct device_d *dev) imx_iim_add_bank(dev, base, i); } + imx_iim_init_dt(dev); if (IS_ENABLED(CONFIG_IMX_IIM_FUSE_BLOW)) dev_add_param_bool(dev, "permanent_write_enable", @@ -245,9 +294,18 @@ static int imx_iim_probe(struct device_d *dev) return 0; } +static __maybe_unused struct of_device_id imx_iim_dt_ids[] = { + { + .compatible = "fsl,imx-iim", + }, { + /* sentinel */ + } +}; + static struct driver_d imx_iim_driver = { .name = DRIVERNAME, .probe = imx_iim_probe, + .of_compatible = DRV_OF_COMPAT(imx_iim_dt_ids), }; static int imx_iim_init(void) -- 1.8.2.rc2 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox