[PATCH 09/10] ARM: mx28: read fec mac address from ocotp

[Shawn Guo]

Read fec mac address from ocotp and save it into fec_platform_data
mac field for fec driver to use.

Signed-off-by: Shawn Guo <shawn.guo at freescale.com>
---
 arch/arm/mach-mxs/devices/platform-fec.c        |    2 +-
 arch/arm/mach-mxs/include/mach/devices-common.h |    2 +-
 arch/arm/mach-mxs/mach-mx28evk.c                |   31 +++++++++++++++++++++++
 3 files changed, 33 insertions(+), 2 deletions(-)

diff --git a/arch/arm/mach-mxs/devices/platform-fec.c b/arch/arm/mach-mxs/devices/platform-fec.c
index c08168c..dc978ee 100644
--- a/arch/arm/mach-mxs/devices/platform-fec.c
+++ b/arch/arm/mach-mxs/devices/platform-fec.c
@@ -31,7 +31,7 @@ const struct mxs_fec_data mx28_fec_data[] __initconst = {
 
 struct platform_device *__init mxs_add_fec(
 		const struct mxs_fec_data *data,
-		const struct fec_platform_data *pdata)
+		struct fec_platform_data *pdata)
 {
 	struct resource res[] = {
 		{
diff --git a/arch/arm/mach-mxs/include/mach/devices-common.h b/arch/arm/mach-mxs/include/mach/devices-common.h
index fca0551..d206e0a 100644
--- a/arch/arm/mach-mxs/include/mach/devices-common.h
+++ b/arch/arm/mach-mxs/include/mach/devices-common.h
@@ -38,4 +38,4 @@ struct mxs_fec_data {
 };
 struct platform_device *__init mxs_add_fec(
 		const struct mxs_fec_data *data,
-		const struct fec_platform_data *pdata);
+		struct fec_platform_data *pdata);
diff --git a/arch/arm/mach-mxs/mach-mx28evk.c b/arch/arm/mach-mxs/mach-mx28evk.c
index def6519..d133733 100644
--- a/arch/arm/mach-mxs/mach-mx28evk.c
+++ b/arch/arm/mach-mxs/mach-mx28evk.c
@@ -129,6 +129,36 @@ static struct fec_platform_data mx28_fec_pdata[] = {
 	},
 };
 
+static int __init mx28evk_fec_get_mac(void)
+{
+	int i, ret;
+	u32 val;
+
+	/*
+	 * OCOTP only stores the last 4 octets for each mac address,
+	 * so hard-coding the first two octets as Freescale OUI (00:04:9f)
+	 * is needed.
+	 */
+	for (i = 0; i < 2; i++) {
+		ret = mxs_read_ocotp(0x20 + i * 0x10, 1, &val);
+		if (ret)
+			goto error;
+
+		mx28_fec_pdata[i].mac[0] = 0x00;
+		mx28_fec_pdata[i].mac[1] = 0x04;
+		mx28_fec_pdata[i].mac[2] = (val >> 24) & 0xff;
+		mx28_fec_pdata[i].mac[3] = (val >> 16) & 0xff;
+		mx28_fec_pdata[i].mac[4] = (val >> 8) & 0xff;
+		mx28_fec_pdata[i].mac[5] = (val >> 0) & 0xff;
+	}
+
+	return 0;
+
+error:
+	pr_err("%s: timeout when reading fec mac from OCOTP\n", __func__);
+	return -ETIMEDOUT;
+}
+
 static void __init mx28evk_init(void)
 {
 	mxs_iomux_setup_multiple_pads(mx28evk_pads, ARRAY_SIZE(mx28evk_pads));
@@ -136,6 +166,7 @@ static void __init mx28evk_init(void)
 	mx28_add_duart();
 
 	mx28evk_fec_reset();
+	mx28evk_fec_get_mac();
 	mx28_add_fec(0, &mx28_fec_pdata[0]);
 #ifdef CONFIG_FEC2
 	mx28_add_fec(1, &mx28_fec_pdata[1]);
-- 
1.7.1