From patchwork Mon Jul 11 09:28:21 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Rajashekhara, Sudhakar" X-Patchwork-Id: 963832 Received: from comal.ext.ti.com (comal.ext.ti.com [198.47.26.152]) by demeter1.kernel.org (8.14.4/8.14.4) with ESMTP id p6B9fIq5007994 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK) for ; Mon, 11 Jul 2011 09:41:40 GMT Received: from dlep34.itg.ti.com ([157.170.170.115]) by comal.ext.ti.com (8.13.7/8.13.7) with ESMTP id p6B9fHOp026429 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Mon, 11 Jul 2011 04:41:17 -0500 Received: from linux.omap.com (smtp-le.itg.ti.com [157.170.170.27]) by dlep34.itg.ti.com (8.13.7/8.13.8) with ESMTP id p6B9fFY2017343 for ; Mon, 11 Jul 2011 04:41:15 -0500 (CDT) Received: from linux.omap.com (localhost [127.0.0.1]) by linux.omap.com (Postfix) with ESMTP id 3C1AA80671 for ; Mon, 11 Jul 2011 04:41:12 -0500 (CDT) X-Original-To: davinci-linux-open-source@linux.davincidsp.com Delivered-To: davinci-linux-open-source@linux.davincidsp.com Received: from dbdp20.itg.ti.com (dbdp20.itg.ti.com [172.24.170.38]) by linux.omap.com (Postfix) with ESMTP id 2032B80626 for ; Mon, 11 Jul 2011 04:41:06 -0500 (CDT) Received: from dbde70.ent.ti.com (localhost [127.0.0.1]) by dbdp20.itg.ti.com (8.13.8/8.13.8) with ESMTP id p6B9f4jA015742; Mon, 11 Jul 2011 15:11:04 +0530 (IST) Received: from dbdp31.itg.ti.com (172.24.170.98) by DBDE70.ent.ti.com (172.24.170.148) with Microsoft SMTP Server id 8.3.106.1; Mon, 11 Jul 2011 15:11:04 +0530 Received: from ucmsshproxy.india.ext.ti.com (dbdp20.itg.ti.com [172.24.170.38]) by dbdp31.itg.ti.com (8.13.8/8.13.8) with SMTP id p6B9f0GK010243; Mon, 11 Jul 2011 15:11:02 +0530 (IST) Received: from symphony.india.ext.ti.com (unknown [192.168.247.13]) by ucmsshproxy.india.ext.ti.com (Postfix) with ESMTP id 7421D158002; Mon, 11 Jul 2011 15:11:00 +0530 (IST) Received: from linux-psp-server.india.ext.ti.com (linux-psp-server [192.168.247.76]) by symphony.india.ext.ti.com (8.11.7p1+Sun/8.11.7) with ESMTP id p6B9ewq18856; Mon, 11 Jul 2011 15:10:59 +0530 (IST) From: "Rajashekhara, Sudhakar" To: Subject: [PATCH v3] davinci: da850 EVM: read mac address from SPI flash Date: Mon, 11 Jul 2011 14:58:21 +0530 Message-ID: <1310376501-14189-1-git-send-email-sudhakar.raj@ti.com> X-Mailer: git-send-email 1.7.1 MIME-Version: 1.0 Cc: linux-arm-kernel@lists.infradead.org X-BeenThere: davinci-linux-open-source@linux.davincidsp.com X-Mailman-Version: 2.1.12 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: davinci-linux-open-source-bounces+patchwork-davinci=patchwork.kernel.org@linux.davincidsp.com Errors-To: davinci-linux-open-source-bounces+patchwork-davinci=patchwork.kernel.org@linux.davincidsp.com X-Greylist: Sender succeeded STARTTLS authentication, not delayed by milter-greylist-4.2.6 (demeter1.kernel.org [140.211.167.41]); Mon, 11 Jul 2011 09:42:48 +0000 (UTC) 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. Signed-off-by: Rajashekhara, Sudhakar --- arch/arm/mach-davinci/board-da850-evm.c | 30 ++++++++++++++++++++++++++++++ 1 files changed, 30 insertions(+), 0 deletions(-) diff --git a/arch/arm/mach-davinci/board-da850-evm.c b/arch/arm/mach-davinci/board-da850-evm.c index a7b41bf..5bb6556 100644 --- a/arch/arm/mach-davinci/board-da850-evm.c +++ b/arch/arm/mach-davinci/board-da850-evm.c @@ -115,6 +115,25 @@ static struct spi_board_info da850evm_spi_info[] = { }, }; +#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, +}; +#endif + static struct mtd_partition da850_evm_norflash_partition[] = { { .name = "bootloaders + env", @@ -1117,6 +1136,15 @@ static __init int da850_evm_init_cpufreq(void) static __init int da850_evm_init_cpufreq(void) { return 0; } #endif +#ifdef CONFIG_MTD +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 __init void da850_evm_init(void) { int ret; @@ -1237,6 +1265,8 @@ static __init void da850_evm_init(void) if (ret) pr_warning("da850_evm_init: spi 1 registration failed: %d\n", ret); + + da850_evm_setup_mac_addr(); } #ifdef CONFIG_SERIAL_8250_CONSOLE