lkml.org 
[lkml]   [2011]   [Nov]   [2]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
Subject[016/101] ARM: davinci: da850 EVM: read mac address from SPI flash
2.6.33-longterm review patch.  If anyone has any objections, please let us know.

------------------

From: Sudhakar Rajashekhara <sudhakar.raj@ti.com>

commit 810198bc9c109489dfadc57131c5183ce6ad2d7d upstream.

DA850/OMAP-L138 EMAC driver uses random mac address instead of
a fixed one because the mac address is not stuffed into EMAC
platform data.

This patch provides a function which reads the mac address
stored in SPI flash (registered as MTD device) and populates the
EMAC platform data. The function which reads the mac address is
registered as a callback which gets called upon addition of MTD
device.

NOTE: In case the MAC address stored in SPI flash is erased, follow
the instructions at [1] to restore it.

[1] http://processors.wiki.ti.com/index.php/GSG:_OMAP-L138_DVEVM_Additional_Procedures#Restoring_MAC_address_on_SPI_Flash

Modifications in v2:
Guarded registering the mtd_notifier only when MTD is enabled.
Earlier this was handled using mtd_has_partitions() call, but
this has been removed in Linux v3.0.

Modifications in v3:
a. Guarded da850_evm_m25p80_notify_add() function and
da850evm_spi_notifier structure with CONFIG_MTD macros.
b. Renamed da850_evm_register_mtd_user() function to
da850_evm_setup_mac_addr() and removed the struct mtd_notifier
argument to this function.
c. Passed the da850evm_spi_notifier structure to register_mtd_user()
function.

Modifications in v4:
Moved the da850_evm_setup_mac_addr() function within the first
CONFIG_MTD ifdef construct.

Signed-off-by: Sudhakar Rajashekhara <sudhakar.raj@ti.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

---
arch/arm/mach-davinci/board-da850-evm.c | 28 ++++++++++++++++++++++++++++
1 file changed, 28 insertions(+)

--- a/arch/arm/mach-davinci/board-da850-evm.c
+++ b/arch/arm/mach-davinci/board-da850-evm.c
@@ -44,6 +44,32 @@

#define DA850_MII_MDIO_CLKEN_PIN GPIO_TO_PIN(2, 6)

+#ifdef CONFIG_MTD
+static void da850_evm_m25p80_notify_add(struct mtd_info *mtd)
+{
+ char *mac_addr = davinci_soc_info.emac_pdata->mac_addr;
+ size_t retlen;
+
+ if (!strcmp(mtd->name, "MAC-Address")) {
+ mtd->read(mtd, 0, ETH_ALEN, &retlen, mac_addr);
+ if (retlen == ETH_ALEN)
+ pr_info("Read MAC addr from SPI Flash: %pM\n",
+ mac_addr);
+ }
+}
+
+static struct mtd_notifier da850evm_spi_notifier = {
+ .add = da850_evm_m25p80_notify_add,
+};
+
+static void da850_evm_setup_mac_addr(void)
+{
+ register_mtd_user(&da850evm_spi_notifier);
+}
+#else
+static void da850_evm_setup_mac_addr(void) { }
+#endif
+
static struct mtd_partition da850_evm_norflash_partition[] = {
{
.name = "NOR filesystem",
@@ -696,6 +722,8 @@ static __init void da850_evm_init(void)
if (ret)
pr_warning("da850_evm_init: cpuidle registration failed: %d\n",
ret);
+
+ da850_evm_setup_mac_addr();
}

#ifdef CONFIG_SERIAL_8250_CONSOLE



\
 
 \ /
  Last update: 2011-11-03 03:03    [W:0.297 / U:0.400 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site