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pm9g45/pm9253/pm9261: add 1-wire support

PATCH In review Jean-Christophe PLAGNIOL-VILLARD 2 participants 11 messages Oct 28, 2012 – Oct 29, 2012

Subsystems (3)
Arm (32-bit) Arm sub-architectures Arm/Microchip (AT91) SoC support
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Jean-Christophe PLAGNIOL-VILLARD

author
#0 lore raw

cover pm9g45/pm9253/pm9261: add 1-wire support

Hi,

add 1-wire support for:
- pm9g45
- pm9263
- pm9261

use the 1-wire uniq id to generate a local mac address The OUI will be 'ron' => 72:6F:6E

The patch series go on the top of the 1-wire support

The following changes since commit 91413767b35d5f9f66d14376c925386a42d1db0e:

1-wire: add ds2433 support (2012-10-27 12:47:20 +0800)

are available in the git repository at:

git://git.jcrosoft.org/barebox.git delivery/ronetix_w1

for you to fetch changes up to 32c1cc8c210614799454e63cd2728470ab8732b5:

pm9261: use w1 serial number to generate local mac address (2012-10-27 17:08:03 +0800)

----------------------------------------------------------------
Jean-Christophe PLAGNIOL-VILLARD (8):
arm: at91: add gpio_is_valid support
w1: introduce helper to generate mac address from 1-wire id
pm9g45: add 1-wire support
pm9g45: use w1 serial number to generate local mac address
pm9263: add 1-wire support
pm9263: use w1 serial number to generate local mac address
pm9261: add 1-wire support
pm9261: use w1 serial number to generate local mac address

 arch/arm/boards/pm9261/init.c          |   10 ++++++++++
 arch/arm/boards/pm9263/init.c          |   38 ++++++++++++++++++++++++++++++--------
 arch/arm/boards/pm9g45/init.c          |   22 +++++++++++++++++++---
 arch/arm/configs/pm9261_defconfig      |    2 ++
 arch/arm/configs/pm9263_defconfig      |    2 ++
 arch/arm/configs/pm9g45_defconfig      |    2 ++
 arch/arm/mach-at91/include/mach/gpio.h |   11 +++++++++++
 include/w1_mac_address.h               |   64 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 8 files changed, 140 insertions(+), 11 deletions(-)
 create mode 100644 include/w1_mac_address.h

Best Regards,
J.

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author
#1 lore raw

PATCH 1/8 arm: at91: add gpio_is_valid support

Signed-off-by Jean-Christophe PLAGNIOL-VILLARD <[email protected]>
---
 arch/arm/mach-at91/include/mach/gpio.h |   11 +++++++++++
 1 file changed, 11 insertions(+)
arch/arm/mach-at91/include/mach/gpio.h +11 -0
index 3533bf9..4edfd25 100644
@@ -22,6 +22,17 @@
 
 /* these pin numbers double as IRQ numbers, like AT91xxx_ID_* values */
 
+#define ARCH_NR_GPIOS 256
+
+static inline int gpio_is_valid(int gpio)
+{
+	if (gpio < 0)
+		return 0;
+	if (gpio < ARCH_NR_GPIOS)
+		return 1;
+	return 0;
+}
+
 #define	AT91_PIN_PA0	(PIN_BASE + 0x00 + 0)
 #define	AT91_PIN_PA1	(PIN_BASE + 0x00 + 1)
 #define	AT91_PIN_PA2	(PIN_BASE + 0x00 + 2)
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author
#2 lore raw

PATCH 2/8 w1: introduce helper to generate mac address from 1-wire id

Signed-off-by Jean-Christophe PLAGNIOL-VILLARD <[email protected]>
---
 include/w1_mac_address.h |   64 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 64 insertions(+)
 create mode 100644 include/w1_mac_address.h
include/w1_mac_address.h new file +64 -0
new file mode 100644
index 0000000..ed93e0e
@@ -0,0 +1,64 @@
+/*
+ * Copyright (C) 2012 Jean-Christophe PLAGNIOL-VILLARD <[email protected]>
+ *
+ * Under GPLv2 only
+ */
+
+#ifndef __W1_MAC_ADDRESS_H__
+#define __W1_MAC_ADDRESS_H__
+
+static inline int w1_mac_address_register(int eth_num, bool local,
+					 char * oui, char *w1_dev)
+{
+	char buf[6];
+	const char *val;
+	u64 id;
+	int nb_oui = 0;
+	int i, shift;
+	char *tmp = NULL;
+	int ret = 0;
+
+	if (!local && !oui)
+		return -EINVAL;
+
+	if (oui) {
+		nb_oui = strlen(oui);
+		if (!local && nb_oui != 3)
+			return -EINVAL;
+
+		nb_oui = min(nb_oui, 3);
+
+		for (i = 0; i < nb_oui; i++)
+			buf[i] = oui[i];
+	}
+
+	tmp = asprintf("%s.id", w1_dev);
+	if (!tmp)
+		return -ENOMEM;
+
+	val = getenv("w1-1-0.id");
+	if (!val) {
+		ret = -EINVAL;
+		goto err;
+	}
+
+	id = simple_strtoull(val, NULL, 16);
+	if (!id) {
+		ret = -EINVAL;
+		goto err;
+	}
+
+	for (i = nb_oui, shift = 40; i < 6; i++, shift -= 8)
+		buf[i] = (id >> shift) & 0xff;
+
+	if (local)
+		buf[0] |= 0x2;
+
+	eth_register_ethaddr(eth_num, buf);
+
+err:
+	free(tmp);
+	return ret;
+}
+
+#endif /* __W1_MAC_ADDRESS_H__ */
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#3 lore raw

Re: [PATCH 2/8] w1: introduce helper to generate mac address from 1-wire id

Quoted 13 lines · Jean-Christophe PLAGNIOL-VILLARD
Signed-off-by Jean-Christophe PLAGNIOL-VILLARD <[email protected]>
---
 include/w1_mac_address.h |   64 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 64 insertions(+)
 create mode 100644 include/w1_mac_address.h
include/w1_mac_address.h new file +1 -0
new file mode 100644
index 0000000..ed93e0e
@@ -0,0 +1,64 @@
+/*

include/w1_mac_address.h line 11

Quoted 10 lines
include/w1_mac_address.h new file +10 -0
+ * Copyright (C) 2012 Jean-Christophe PLAGNIOL-VILLARD <[email protected]>
+ *
+ * Under GPLv2 only
+ */
+
+#ifndef __W1_MAC_ADDRESS_H__
+#define __W1_MAC_ADDRESS_H__
+
+static inline int w1_mac_address_register(int eth_num, bool local,
+					 char * oui, char *w1_dev)

This function really deserves a comment what it does. From the name I assume that it turns something w1 related into a MAC address, but I have no clue what.

Also I think the 'local' parameter should not exist and be unconditional true. I don't think any vendor with a real ieee registered oui will match their mac addresses with ids from a w1 eeprom.

Quoted 4 lines
include/w1_mac_address.h new file +4 -0
+{
+	char buf[6];
+	const char *val;
+	u64 id;

include/w1_mac_address.h line 25

Quoted 10 lines
include/w1_mac_address.h new file +10 -0
+	int nb_oui = 0;
+	int i, shift;
+	char *tmp = NULL;
+	int ret = 0;
+
+	if (!local && !oui)
+		return -EINVAL;
+
+	if (oui) {
+		nb_oui = strlen(oui);

A oui always has three bytes. You can't use strlen here as for example Freescale has the oui 00-04-9f

Quoted 4 lines
include/w1_mac_address.h new file +4 -0
+		if (!local && nb_oui != 3)
+			return -EINVAL;
+
+		nb_oui = min(nb_oui, 3);

include/w1_mac_address.h line 39

Quoted 10 lines
include/w1_mac_address.h new file +10 -0
+
+		for (i = 0; i < nb_oui; i++)
+			buf[i] = oui[i];
+	}
+
+	tmp = asprintf("%s.id", w1_dev);
+	if (!tmp)
+		return -ENOMEM;
+
+	val = getenv("w1-1-0.id");

tmp is never used. I assume it should be used here, right?

Quoted 34 lines
include/w1_mac_address.h new file +25 -0
+	if (!val) {
+		ret = -EINVAL;
+		goto err;
+	}
+
+	id = simple_strtoull(val, NULL, 16);
+	if (!id) {
+		ret = -EINVAL;
+		goto err;
+	}
+
+	for (i = nb_oui, shift = 40; i < 6; i++, shift -= 8)
+		buf[i] = (id >> shift) & 0xff;
+
+	if (local)
+		buf[0] |= 0x2;
+
+	eth_register_ethaddr(eth_num, buf);
+
+err:
+	free(tmp);
+	return ret;
+}
+
+#endif /* __W1_MAC_ADDRESS_H__ */
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Industrial Linux Solutions                 | http://www.pengutronix.de/  |
Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0    |
Amtsgericht Hildesheim, HRA 2686           | Fax:   +49-5121-206917-5555 |

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author
#4 lore raw

Re: [PATCH 2/8] w1: introduce helper to generate mac address from 1-wire id

Quoted 29 lines · Sascha Hauer
Quoted 13 lines · Jean-Christophe PLAGNIOL-VILLARD
Signed-off-by Jean-Christophe PLAGNIOL-VILLARD <[email protected]>
---
 include/w1_mac_address.h |   64 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 64 insertions(+)
 create mode 100644 include/w1_mac_address.h
include/w1_mac_address.h new file +1 -0
new file mode 100644
index 0000000..ed93e0e
@@ -0,0 +1,64 @@
+/*

include/w1_mac_address.h line 11

Quoted 10 lines
include/w1_mac_address.h new file +10 -0
+ * Copyright (C) 2012 Jean-Christophe PLAGNIOL-VILLARD <[email protected]>
+ *
+ * Under GPLv2 only
+ */
+
+#ifndef __W1_MAC_ADDRESS_H__
+#define __W1_MAC_ADDRESS_H__
+
+static inline int w1_mac_address_register(int eth_num, bool local,
+					 char * oui, char *w1_dev)

This function really deserves a comment what it does. From the name I assume that it turns something w1 related into a MAC address, but I have no clue what.

Quoted 3 lines

Also I think the 'local' parameter should not exist and be unconditional true. I don't think any vendor with a real ieee registered oui will match their mac addresses with ids from a w1 eeprom.

as you can request specific id format for the serial number 1-wire (smem)

you can use it for real OUI

with this way you can prouve than you manage your OUI correctly if you need to request an other one

Best Regards,
J.

Quoted 65 lines
Quoted 5 lines
include/w1_mac_address.h new file +4 -0
+{
+	char buf[6];
+	const char *val;
+	u64 id;

include/w1_mac_address.h line 25

Quoted 10 lines
include/w1_mac_address.h new file +10 -0
+	int nb_oui = 0;
+	int i, shift;
+	char *tmp = NULL;
+	int ret = 0;
+
+	if (!local && !oui)
+		return -EINVAL;
+
+	if (oui) {
+		nb_oui = strlen(oui);

A oui always has three bytes. You can't use strlen here as for example Freescale has the oui 00-04-9f

Quoted 4 lines
include/w1_mac_address.h new file +4 -0
+		if (!local && nb_oui != 3)
+			return -EINVAL;
+
+		nb_oui = min(nb_oui, 3);

include/w1_mac_address.h line 39

Quoted 10 lines
include/w1_mac_address.h new file +10 -0
+
+		for (i = 0; i < nb_oui; i++)
+			buf[i] = oui[i];
+	}
+
+	tmp = asprintf("%s.id", w1_dev);
+	if (!tmp)
+		return -ENOMEM;
+
+	val = getenv("w1-1-0.id");

tmp is never used. I assume it should be used here, right?

Quoted 29 lines
include/w1_mac_address.h new file +25 -0
+	if (!val) {
+		ret = -EINVAL;
+		goto err;
+	}
+
+	id = simple_strtoull(val, NULL, 16);
+	if (!id) {
+		ret = -EINVAL;
+		goto err;
+	}
+
+	for (i = nb_oui, shift = 40; i < 6; i++, shift -= 8)
+		buf[i] = (id >> shift) & 0xff;
+
+	if (local)
+		buf[0] |= 0x2;
+
+	eth_register_ethaddr(eth_num, buf);
+
+err:
+	free(tmp);
+	return ret;
+}
+
+#endif /* __W1_MAC_ADDRESS_H__ */
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Quoted 11 lines
Quoted 5 lines

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Signature · 4 lines
Pengutronix e.K.                           |                             |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |
Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0    |
Amtsgericht Hildesheim, HRA 2686           | Fax:   +49-5121-206917-5555 |

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author
#5 lore raw

PATCH 3/8 pm9g45: add 1-wire support

In reply to Jean-Christophe PLAGNIOL-VILLARD
Signed-off-by Jean-Christophe PLAGNIOL-VILLARD <[email protected]>
---
 arch/arm/boards/pm9g45/init.c     |   11 ++++++++++-
 arch/arm/configs/pm9g45_defconfig |    2 ++
 2 files changed, 12 insertions(+), 1 deletion(-)
arch/arm/boards/pm9g45/init.c +10 -1
index a12896b..907c6bb 100644
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2009 Jean-Christophe PLAGNIOL-VILLARD <[email protected]>
+ * Copyright (C) 2009-2012 Jean-Christophe PLAGNIOL-VILLARD <[email protected]>
  *
  * Copyright (C) 2007 Sascha Hauer, Pengutronix
  *

@@ -35,6 +35,12 @@
 #include <mach/io.h>
 #include <mach/at91sam9_smc.h>
 #include <mach/sam9_smc.h>
+#include <linux/w1-gpio.h>
+
+struct w1_gpio_platform_data w1_pdata = {
+	.pin = AT91_PIN_PA31,
+	.is_open_drain = 0,
+};
 
 static struct atmel_nand_data nand_pdata = {
 	.ale		= 21,

@@ -132,6 +138,9 @@ mem_initcall(pm9g45_mem_init);
 
 static int pm9g45_devices_init(void)
 {
+	at91_set_gpio_input(w1_pdata.pin, 0);
+	add_generic_device_res("w1-gpio", DEVICE_ID_SINGLE, NULL, 0, &w1_pdata);
+
 	pm_add_device_nand();
 	pm9g45_add_device_mci();
 	pm9g45_phy_init();
arch/arm/configs/pm9g45_defconfig +2 -0
index 958301d..d242bdc 100644
@@ -56,6 +56,8 @@ CONFIG_USB_OHCI_AT91=y
 CONFIG_USB_STORAGE=y
 CONFIG_MCI=y
 CONFIG_MCI_ATMEL=y
+CONFIG_W1=y
+CONFIG_W1_MASTER_GPIO=y
 CONFIG_FS_TFTP=y
 CONFIG_FS_FAT=y
 CONFIG_FS_FAT_WRITE=y
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author
#6 lore raw

PATCH 4/8 pm9g45: use w1 serial number to generate local mac address

In reply to Jean-Christophe PLAGNIOL-VILLARD

The OUI will be 'ron' => 72:6F:6E

Signed-off-by Jean-Christophe PLAGNIOL-VILLARD <[email protected]>
---
 arch/arm/boards/pm9g45/init.c |   11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)
arch/arm/boards/pm9g45/init.c +9 -2
index 907c6bb..f3764bb 100644
@@ -36,6 +36,7 @@
 #include <mach/at91sam9_smc.h>
 #include <mach/sam9_smc.h>
 #include <linux/w1-gpio.h>
+#include <w1_mac_address.h>
 
 struct w1_gpio_platform_data w1_pdata = {
 	.pin = AT91_PIN_PA31,

@@ -128,6 +129,13 @@ static void pm9g45_phy_init(void)
 	at91_set_gpio_value(AT91_PIN_PD2, 1);
 }
 
+static void pm9g45_add_device_eth(void)
+{
+	w1_mac_address_register(0, true, "ron", "w1-1-0");
+	pm9g45_phy_init();
+	at91_add_device_eth(0, &macb_pdata);
+}
+
 static int pm9g45_mem_init(void)
 {
 	at91_add_device_sdram(128 * 1024 * 1024);

@@ -143,8 +151,7 @@ static int pm9g45_devices_init(void)
 
 	pm_add_device_nand();
 	pm9g45_add_device_mci();
-	pm9g45_phy_init();
-	at91_add_device_eth(0, &macb_pdata);
+	pm9g45_add_device_eth();
 	pm9g45_add_device_usbh();
 
 	devfs_add_partition("nand0", 0x00000, SZ_128K, DEVFS_PARTITION_FIXED, "at91bootstrap_raw");
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author
#7 lore raw

PATCH 5/8 pm9263: add 1-wire support

In reply to Jean-Christophe PLAGNIOL-VILLARD
Signed-off-by Jean-Christophe PLAGNIOL-VILLARD <[email protected]>
---
 arch/arm/boards/pm9263/init.c     |   11 +++++++++++
 arch/arm/configs/pm9263_defconfig |    2 ++
 2 files changed, 13 insertions(+)
arch/arm/boards/pm9263/init.c +11 -0
index b17a90a..1d13e03 100644
@@ -1,4 +1,6 @@
 /*
+ * Copyright (C) 2009-2012 Jean-Christophe PLAGNIOL-VILLARD <[email protected]>
+ *
  * Copyright (C) 2007 Sascha Hauer, Pengutronix
  *
  * This program is free software; you can redistribute it and/or

@@ -34,6 +36,12 @@
 #include <mach/io.h>
 #include <mach/at91sam9_smc.h>
 #include <mach/sam9_smc.h>
+#include <linux/w1-gpio.h>
+
+struct w1_gpio_platform_data w1_pdata = {
+	.pin = AT91_PIN_PB31,
+	.is_open_drain = 0,
+};
 
 static struct atmel_nand_data nand_pdata = {
 	.ale		= 21,

@@ -95,6 +103,9 @@ mem_initcall(pm9263_mem_init);
 
 static int pm9263_devices_init(void)
 {
+	at91_set_gpio_input(w1_pdata.pin, 0);
+	add_generic_device_res("w1-gpio", DEVICE_ID_SINGLE, NULL, 0, &w1_pdata);
+
 	/*
 	 * PB27 enables the 50MHz oscillator for Ethernet PHY
 	 * 1 - enable
arch/arm/configs/pm9263_defconfig +2 -0
index 8c92894..e223e77 100644
@@ -35,3 +35,5 @@ CONFIG_DRIVER_NET_MACB=y
 # CONFIG_SPI is not set
 CONFIG_DRIVER_CFI=y
 CONFIG_CFI_BUFFER_WRITE=y
+CONFIG_W1=y
+CONFIG_W1_MASTER_GPIO=y
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author
#8 lore raw

PATCH 6/8 pm9263: use w1 serial number to generate local mac address

In reply to Jean-Christophe PLAGNIOL-VILLARD

The OUI will be 'ron' => 72:6F:6E

Signed-off-by Jean-Christophe PLAGNIOL-VILLARD <[email protected]>
---
 arch/arm/boards/pm9263/init.c |   29 ++++++++++++++++++++---------
 1 file changed, 20 insertions(+), 9 deletions(-)
arch/arm/boards/pm9263/init.c +20 -9
index 1d13e03..7ba804a 100644
@@ -37,6 +37,7 @@
 #include <mach/at91sam9_smc.h>
 #include <mach/sam9_smc.h>
 #include <linux/w1-gpio.h>
+#include <w1_mac_address.h>
 
 struct w1_gpio_platform_data w1_pdata = {
 	.pin = AT91_PIN_PB31,

@@ -93,6 +94,24 @@ static struct at91_ether_platform_data macb_pdata = {
 	.phy_addr = 0,
 };
 
+static void pm9263_phy_init(void)
+{
+	/*
+	 * PB27 enables the 50MHz oscillator for Ethernet PHY
+	 * 1 - enable
+	 * 0 - disable
+	 */
+	at91_set_gpio_output(AT91_PIN_PB27, 1);
+	at91_set_gpio_value(AT91_PIN_PB27, 1); /* 1- enable, 0 - disable */
+}
+
+static void pm9263_add_device_eth(void)
+{
+	w1_mac_address_register(0, true, "ron", "w1-1-0");
+	pm9263_phy_init();
+	at91_add_device_eth(0, &macb_pdata);
+}
+
 static int pm9263_mem_init(void)
 {
 	at91_add_device_sdram(64 * 1024 * 1024);

@@ -106,16 +125,8 @@ static int pm9263_devices_init(void)
 	at91_set_gpio_input(w1_pdata.pin, 0);
 	add_generic_device_res("w1-gpio", DEVICE_ID_SINGLE, NULL, 0, &w1_pdata);
 
-	/*
-	 * PB27 enables the 50MHz oscillator for Ethernet PHY
-	 * 1 - enable
-	 * 0 - disable
-	 */
-	at91_set_gpio_output(AT91_PIN_PB27, 1);
-	at91_set_gpio_value(AT91_PIN_PB27, 1); /* 1- enable, 0 - disable */
-
 	pm_add_device_nand();
-	at91_add_device_eth(0, &macb_pdata);
+	pm9263_add_device_eth();
 	add_cfi_flash_device(0, AT91_CHIPSELECT_0, 4 * 1024 * 1024, 0);
 
 	devfs_add_partition("nor0", 0x00000, 0x40000, DEVFS_PARTITION_FIXED, "self0");
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author
#9 lore raw

PATCH 7/8 pm9261: add 1-wire support

In reply to Jean-Christophe PLAGNIOL-VILLARD
Signed-off-by Jean-Christophe PLAGNIOL-VILLARD <[email protected]>
---
 arch/arm/boards/pm9261/init.c     |    8 ++++++++
 arch/arm/configs/pm9261_defconfig |    2 ++
 2 files changed, 10 insertions(+)
arch/arm/boards/pm9261/init.c +8 -0
index 5214394..2c3615f 100644
@@ -1,4 +1,6 @@
 /*
+ * Copyright (C) 2009-2012 Jean-Christophe PLAGNIOL-VILLARD <[email protected]>
+ *
  * Copyright (C) 2007 Sascha Hauer, Pengutronix
  *
  * This program is free software; you can redistribute it and/or

@@ -34,6 +36,12 @@
 #include <mach/at91sam9_smc.h>
 #include <mach/sam9_smc.h>
 #include <dm9000.h>
+#include <linux/w1-gpio.h>
+
+struct w1_gpio_platform_data w1_pdata = {
+	.pin = AT91_PIN_PA7,
+	.is_open_drain = 0,
+};
 
 static struct atmel_nand_data nand_pdata = {
 	.ale		= 22,
arch/arm/configs/pm9261_defconfig +2 -0
index 1db16d5..0aea2c9 100644
@@ -50,3 +50,5 @@ CONFIG_MTD=y
 CONFIG_NAND=y
 CONFIG_NAND_ATMEL=y
 CONFIG_UBI=y
+CONFIG_W1=y
+CONFIG_W1_MASTER_GPIO=y
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1.7.10.4


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author
#10 lore raw

PATCH 8/8 pm9261: use w1 serial number to generate local mac address

In reply to Jean-Christophe PLAGNIOL-VILLARD

The OUI will be 'ron' => 72:6F:6E

Signed-off-by Jean-Christophe PLAGNIOL-VILLARD <[email protected]>
---
 arch/arm/boards/pm9261/init.c |    2 ++
 1 file changed, 2 insertions(+)
arch/arm/boards/pm9261/init.c +2 -0
index 2c3615f..72fdb0e 100644
@@ -37,6 +37,7 @@
 #include <mach/sam9_smc.h>
 #include <dm9000.h>
 #include <linux/w1-gpio.h>
+#include <w1_mac_address.h>
 
 struct w1_gpio_platform_data w1_pdata = {
 	.pin = AT91_PIN_PA7,

@@ -120,6 +121,7 @@ static struct sam9_smc_config __initdata dm9000_smc_config = {
 
 static void __init pm_add_device_dm9000(void)
 {
+	w1_mac_address_register(0, true, "ron", "w1-1-0");
 	/* Configure chip-select 2 (DM9000) */
 	sam9_smc_configure(2, &dm9000_smc_config);
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