diff options
| author | Rajashekhara, Sudhakar <sudhakar.raj@ti.com> | 2011-07-12 15:58:53 +0530 |
|---|---|---|
| committer | Paul Gortmaker <paul.gortmaker@windriver.com> | 2012-08-17 15:35:12 -0400 |
| commit | 4b1c5d9e91589db75cb1dc18c7615514c7eb7a8a (patch) | |
| tree | 5674afe826635d5a74cb544c329dc294a107a46b /arch | |
| parent | e664376f21fc892ac0014d24ab48155115d8c79e (diff) | |
ARM: davinci: da850 EVM: read mac address from SPI flash
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: Rajashekhara, Sudhakar <sudhakar.raj@ti.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/mach-davinci/board-da850-evm.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/arch/arm/mach-davinci/board-da850-evm.c b/arch/arm/mach-davinci/board-da850-evm.c index 411284d0b0fa..cc4e5cb126f6 100644 --- 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 = "bootloaders + env", @@ -726,6 +752,8 @@ static __init void da850_evm_init(void) if (ret) pr_warning("da850_evm_init: suspend registration failed: %d\n", ret); + + da850_evm_setup_mac_addr(); } #ifdef CONFIG_SERIAL_8250_CONSOLE |