From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from na01-bl2-obe.outbound.protection.outlook.com (mail-bl2on0141.outbound.protection.outlook.com [65.55.169.141]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id C5FF01A1D07 for ; Fri, 31 Jul 2015 23:08:33 +1000 (AEST) From: Chenhui Zhao To: , CC: , Subject: [PATCH 2/4] powerpc: get the physical base address of DCSR Date: Fri, 31 Jul 2015 20:53:04 +0800 Message-ID: <1438347186-8462-2-git-send-email-chenhui.zhao@freescale.com> In-Reply-To: <1438347186-8462-1-git-send-email-chenhui.zhao@freescale.com> References: <1438347186-8462-1-git-send-email-chenhui.zhao@freescale.com> MIME-Version: 1.0 Content-Type: text/plain List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Add get_dcsrbase() to get the physical base address of DCSR. Signed-off-by: Chenhui Zhao --- arch/powerpc/sysdev/fsl_soc.c | 31 +++++++++++++++++++++++++++++++ arch/powerpc/sysdev/fsl_soc.h | 1 + 2 files changed, 32 insertions(+) diff --git a/arch/powerpc/sysdev/fsl_soc.c b/arch/powerpc/sysdev/fsl_soc.c index 99269c0..ffb7c1c 100644 --- a/arch/powerpc/sysdev/fsl_soc.c +++ b/arch/powerpc/sysdev/fsl_soc.c @@ -45,6 +45,37 @@ extern void init_fcc_ioports(struct fs_platform_info*); extern void init_fec_ioports(struct fs_platform_info*); extern void init_smc_ioports(struct fs_uart_platform_info*); static phys_addr_t immrbase = -1; +static phys_addr_t dcsrbase = -1; + +phys_addr_t get_dcsrbase(void) +{ + struct device_node *np; + const __be32 *prop; + int size; + u32 naddr; + + if (dcsrbase != -1) + return dcsrbase; + + np = of_find_compatible_node(NULL, NULL, "fsl,dcsr"); + if (!np) + return -1; + + prop = of_get_property(np, "#address-cells", &size); + if (prop && size == 4) + naddr = be32_to_cpup(prop); + else + naddr = 2; + + prop = of_get_property(np, "ranges", NULL); + if (prop) + dcsrbase = of_translate_address(np, prop + naddr); + + of_node_put(np); + + return dcsrbase; +} +EXPORT_SYMBOL(get_dcsrbase); phys_addr_t get_immrbase(void) { diff --git a/arch/powerpc/sysdev/fsl_soc.h b/arch/powerpc/sysdev/fsl_soc.h index 4c5a19e..5fdd3a5 100644 --- a/arch/powerpc/sysdev/fsl_soc.h +++ b/arch/powerpc/sysdev/fsl_soc.h @@ -6,6 +6,7 @@ struct spi_device; +extern phys_addr_t get_dcsrbase(void); extern phys_addr_t get_immrbase(void); #if defined(CONFIG_CPM2) || defined(CONFIG_QUICC_ENGINE) || defined(CONFIG_8xx) extern u32 get_brgfreq(void); -- 1.9.1