[PATCH] arm: mxs: get MAC from OCOTP for MX28EVK

[PATCH] arm: mxs: get MAC from OCOTP for MX28EVK

[Wolfram Sang]

Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
---
 arch/arm/boards/freescale-mx28-evk/mx28-evk.c |   25 +++++++++++++++++++++++--
 arch/arm/mach-mxs/Kconfig                     |    1 +
 2 files changed, 24 insertions(+), 2 deletions(-)

diff --git a/arch/arm/boards/freescale-mx28-evk/mx28-evk.c b/arch/arm/boards/freescale-mx28-evk/mx28-evk.c
index 9168ed8..f0b256b 100644
--- a/arch/arm/boards/freescale-mx28-evk/mx28-evk.c
+++ b/arch/arm/boards/freescale-mx28-evk/mx28-evk.c
@@ -22,17 +22,18 @@
 #include <init.h>
 #include <mci.h>
 #include <io.h>
+#include <net.h>
 
 #include <mach/clock.h>
 #include <mach/imx-regs.h>
 #include <mach/iomux-imx28.h>
 #include <mach/mci.h>
+#include <mach/fb.h>
+#include <mach/ocotp.h>
 
 #include <asm/armlinux.h>
 #include <asm/mmu.h>
 
-#include <mach/fb.h>
-
 #include <generated/mach-types.h>
 
 #define MX28EVK_FEC_PHY_RESET_GPIO	141
@@ -118,6 +119,22 @@ static struct mxs_mci_platform_data mci_pdata = {
 };
 
 /* fec */
+void mx28_evk_get_ethaddr(void)
+{
+	u8 mac[6] = { 0x00, 0x04, 0x9f, 0x00, 0x00, 0x00 };
+	u8 tmp;
+	int ret;
+
+	ret = mxs_ocotp_read(mac + 3, 3, 0);
+	if (ret != 3)
+		return;
+
+	tmp = mac[5];
+	mac[5] = mac[3];
+	mac[3] = tmp;
+	eth_register_ethaddr(0, mac);
+}
+
 static void __init mx28_evk_fec_reset(void)
 {
 	mdelay(1);
@@ -208,6 +225,10 @@ static int mx28_evk_devices_init(void)
 	add_generic_device("stmfb", 0, NULL, IMX_FB_BASE, 4096,
 			   IORESOURCE_MEM, &mx28_evk_fb_pdata);
 
+	add_generic_device("ocotp", 0, NULL, IMX_OCOTP_BASE, 0,
+			IORESOURCE_MEM, NULL);
+	mx28_evk_get_ethaddr(); /* must be after registering ocotp */
+
 	imx_enable_enetclk();
 	mx28_evk_fec_reset();
 	add_generic_device("fec_imx", 0, NULL, IMX_FEC0_BASE, 0,
diff --git a/arch/arm/mach-mxs/Kconfig b/arch/arm/mach-mxs/Kconfig
index f646e0b..9ce7c7a 100644
--- a/arch/arm/mach-mxs/Kconfig
+++ b/arch/arm/mach-mxs/Kconfig
@@ -61,6 +61,7 @@ config MACH_TX28
 
 config MACH_MX28EVK
 	bool "mx28-evk"
+	select MXS_OCOTP
 	help
 	  Say Y here if you are using the Freescale i.MX28-EVK board
 
-- 
1.7.10


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Re: [PATCH] arm: mxs: get MAC from OCOTP for MX28EVK

[Sascha Hauer]

On Wed, May 09, 2012 at 10:51:39PM +0200, Wolfram Sang wrote:
> Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
> ---
>  arch/arm/boards/freescale-mx28-evk/mx28-evk.c |   25 +++++++++++++++++++++++--
>  arch/arm/mach-mxs/Kconfig                     |    1 +
>  2 files changed, 24 insertions(+), 2 deletions(-)
> 
> diff --git a/arch/arm/boards/freescale-mx28-evk/mx28-evk.c b/arch/arm/boards/freescale-mx28-evk/mx28-evk.c
> index 9168ed8..f0b256b 100644
> --- a/arch/arm/boards/freescale-mx28-evk/mx28-evk.c
> +++ b/arch/arm/boards/freescale-mx28-evk/mx28-evk.c
> @@ -22,17 +22,18 @@
>  #include <init.h>
>  #include <mci.h>
>  #include <io.h>
> +#include <net.h>
>  
>  #include <mach/clock.h>
>  #include <mach/imx-regs.h>
>  #include <mach/iomux-imx28.h>
>  #include <mach/mci.h>
> +#include <mach/fb.h>
> +#include <mach/ocotp.h>
>  
>  #include <asm/armlinux.h>
>  #include <asm/mmu.h>
>  
> -#include <mach/fb.h>
> -
>  #include <generated/mach-types.h>
>  
>  #define MX28EVK_FEC_PHY_RESET_GPIO	141
> @@ -118,6 +119,22 @@ static struct mxs_mci_platform_data mci_pdata = {
>  };
>  
>  /* fec */
> +void mx28_evk_get_ethaddr(void)
> +{
> +	u8 mac[6] = { 0x00, 0x04, 0x9f, 0x00, 0x00, 0x00 };
> +	u8 tmp;
> +	int ret;
> +
> +	ret = mxs_ocotp_read(mac + 3, 3, 0);
> +	if (ret != 3)
> +		return;
> +
> +	tmp = mac[5];
> +	mac[5] = mac[3];
> +	mac[3] = tmp;
> +	eth_register_ethaddr(0, mac);

Maybe the following would be readable a bit better?

	u8 macpart[3], mac[6];

	ret = mxs_ocotp_read(tmpmac, 3, 0);
	if (ret != 3) {
		pr_err("go away!\n");
		return;
	}

	mac[0] = 0x00;
	mac[1] = 0x04;
	mac[2] = 0x9f;
	mac[3] = tmpmac[2];
	mac[4] = tmpmac[1];
	mac[5] = tmpmac[0];

Sascha

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