From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758357Ab3BFWvI (ORCPT ); Wed, 6 Feb 2013 17:51:08 -0500 Received: from mail-ee0-f47.google.com ([74.125.83.47]:32821 "EHLO mail-ee0-f47.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758246Ab3BFWvC (ORCPT ); Wed, 6 Feb 2013 17:51:02 -0500 From: Ruslan Bilovol To: tony@atomide.com, linux@arm.linux.org.uk, linux-arm-kernel@lists.infradead.org, linux-omap@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v3 2/2] ARM: OMAP2+: Export SoC information to userspace Date: Thu, 7 Feb 2013 00:50:49 +0200 Message-Id: <1360191049-24017-3-git-send-email-ruslan.bilovol@ti.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1360191049-24017-1-git-send-email-ruslan.bilovol@ti.com> References: <1360191049-24017-1-git-send-email-ruslan.bilovol@ti.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org In some situations it is useful for userspace to know some SoC-specific information. For example, this may be used for deciding what kernel module to use or how to better configure some settings etc. This patch exports OMAP SoC information to userspace using existing in Linux kernel SoC infrastructure. This information can be read under /sys/devices/socX directory Signed-off-by: Ruslan Bilovol --- arch/arm/mach-omap2/common.h | 8 ++++++ arch/arm/mach-omap2/id.c | 65 ++++++++++++++++++++++++++++++++++++++++++ arch/arm/mach-omap2/io.c | 1 + arch/arm/plat-omap/Kconfig | 1 + 4 files changed, 75 insertions(+) diff --git a/arch/arm/mach-omap2/common.h b/arch/arm/mach-omap2/common.h index 0c3a991..a024084 100644 --- a/arch/arm/mach-omap2/common.h +++ b/arch/arm/mach-omap2/common.h @@ -111,6 +111,14 @@ void ti81xx_init_late(void); void omap4430_init_late(void); int omap2_common_pm_late_init(void); +#ifdef CONFIG_SOC_BUS +void omap_soc_device_init(void); +#else +static inline void omap_soc_device_init(void) +{ +} +#endif + #if defined(CONFIG_SOC_OMAP2420) || defined(CONFIG_SOC_OMAP2430) void omap2xxx_restart(char mode, const char *cmd); #else diff --git a/arch/arm/mach-omap2/id.c b/arch/arm/mach-omap2/id.c index 3737700..098e94e 100644 --- a/arch/arm/mach-omap2/id.c +++ b/arch/arm/mach-omap2/id.c @@ -18,6 +18,11 @@ #include #include #include +#include + +#ifdef CONFIG_SOC_BUS +#include +#endif #include @@ -583,3 +588,63 @@ void __init omap2_set_globals_tap(u32 class, void __iomem *tap) else tap_prod_id = 0x0208; } + +#ifdef CONFIG_SOC_BUS + +static const char const *omap_types[] = { + [OMAP2_DEVICE_TYPE_TEST] = "TST", + [OMAP2_DEVICE_TYPE_EMU] = "EMU", + [OMAP2_DEVICE_TYPE_SEC] = "HS", + [OMAP2_DEVICE_TYPE_GP] = "GP", + [OMAP2_DEVICE_TYPE_BAD] = "BAD", +}; + +static const char * __init omap_get_family(void) +{ + if (cpu_is_omap24xx()) + return kasprintf(GFP_KERNEL, "OMAP2"); + else if (cpu_is_omap34xx()) + return kasprintf(GFP_KERNEL, "OMAP3"); + else if (cpu_is_omap44xx()) + return kasprintf(GFP_KERNEL, "OMAP4"); + else if (soc_is_omap54xx()) + return kasprintf(GFP_KERNEL, "OMAP5"); + else + return kasprintf(GFP_KERNEL, "Unknown"); +} + +static ssize_t omap_get_type(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + return sprintf(buf, "%s\n", omap_types[omap_type()]); +} + +static struct device_attribute omap_soc_attr = + __ATTR(type, S_IRUGO, omap_get_type, NULL); + +void __init omap_soc_device_init(void) +{ + struct device *parent; + struct soc_device *soc_dev; + struct soc_device_attribute *soc_dev_attr; + + soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL); + if (!soc_dev_attr) + return; + + soc_dev_attr->machine = soc_name; + soc_dev_attr->family = omap_get_family(); + soc_dev_attr->revision = soc_rev; + + soc_dev = soc_device_register(soc_dev_attr); + if (IS_ERR_OR_NULL(soc_dev)) { + kfree(soc_dev_attr); + return; + } + + parent = soc_device_to_device(soc_dev); + if (!IS_ERR_OR_NULL(parent)) + device_create_file(parent, &omap_soc_attr); +} +#endif /* CONFIG_SOC_BUS */ diff --git a/arch/arm/mach-omap2/io.c b/arch/arm/mach-omap2/io.c index 2c3fdd6..08003c1 100644 --- a/arch/arm/mach-omap2/io.c +++ b/arch/arm/mach-omap2/io.c @@ -602,6 +602,7 @@ void __init omap4430_init_late(void) omap2_common_pm_late_init(); omap4_pm_init(); omap2_clk_enable_autoidle_all(); + omap_soc_device_init(); } #endif diff --git a/arch/arm/plat-omap/Kconfig b/arch/arm/plat-omap/Kconfig index 1fbac36..24b5687 100644 --- a/arch/arm/plat-omap/Kconfig +++ b/arch/arm/plat-omap/Kconfig @@ -30,6 +30,7 @@ config ARCH_OMAP2PLUS select PROC_DEVICETREE if PROC_FS select SPARSE_IRQ select USE_OF + select SOC_BUS help "Systems based on OMAP2, OMAP3, OMAP4 or OMAP5" -- 1.7.9.5