Only adds the dt ids.
Signed-off-by: Sascha Hauer <s.ha...@pengutronix.de>
---
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
