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authorSascha Hauer <s.hauer@pengutronix.de>2014-11-26 17:21:54 +0100
committerSascha Hauer <s.hauer@pengutronix.de>2014-11-27 11:25:33 +0100
commitf154e9ca7696ea316c76d8b5500b6c3a62b91593 (patch)
tree9e0fca12ddf1e5d4de70b7c41ea7361b8a5cb705 /arch/arm/mach-imx/ocotp.c
parentf2142fb6dacc7187d0f5dbb18e0adbffa5c9e3e5 (diff)
downloadbarebox-f154e9ca7696ea316c76d8b5500b6c3a62b91593.tar.gz
barebox-f154e9ca7696ea316c76d8b5500b6c3a62b91593.tar.xz
ARM: i.MX: ocotp: Fix MAC address provider for unaligned addresses
The current algorithm assumes the MAC address starts at a 4 byte aligned address. Unfortunately this is not always the case. On the i.MX6sx the MAC Address for the second FEC starts at offset 0x632. The register space for the fuse map has holes, only the 16 byte aligned words contain data. This means we have to skip the holes. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'arch/arm/mach-imx/ocotp.c')
-rw-r--r--arch/arm/mach-imx/ocotp.c29
1 files changed, 20 insertions, 9 deletions
diff --git a/arch/arm/mach-imx/ocotp.c b/arch/arm/mach-imx/ocotp.c
index 837500fff8..419821b810 100644
--- a/arch/arm/mach-imx/ocotp.c
+++ b/arch/arm/mach-imx/ocotp.c
@@ -320,6 +320,14 @@ static struct file_operations imx6_ocotp_ops = {
.lseek = dev_lseek_default,
};
+static uint32_t inc_offset(uint32_t offset)
+{
+ if ((offset & 0x3) == 0x3)
+ return offset + 0xd;
+ else
+ return offset + 1;
+}
+
static void imx_ocotp_init_dt(struct device_d *dev, void __iomem *base)
{
char mac[6];
@@ -336,21 +344,24 @@ static void imx_ocotp_init_dt(struct device_d *dev, void __iomem *base)
while (len >= MAC_ADDRESS_PROPLEN) {
struct device_node *rnode;
- uint32_t phandle, offset, value;
+ uint32_t phandle, offset;
phandle = be32_to_cpup(prop++);
rnode = of_find_node_by_phandle(phandle);
offset = be32_to_cpup(prop++);
- value = readl(base + offset + 0x10);
- mac[0] = (value >> 8);
- mac[1] = value;
- value = readl(base + offset);
- mac[2] = value >> 24;
- mac[3] = value >> 16;
- mac[4] = value >> 8;
- mac[5] = value;
+ mac[5] = readb(base + offset);
+ offset = inc_offset(offset);
+ mac[4] = readb(base + offset);
+ offset = inc_offset(offset);
+ mac[3] = readb(base + offset);
+ offset = inc_offset(offset);
+ mac[2] = readb(base + offset);
+ offset = inc_offset(offset);
+ mac[1] = readb(base + offset);
+ offset = inc_offset(offset);
+ mac[0] = readb(base + offset);
of_eth_register_ethaddr(rnode, mac);