| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-Id: <1360191049-24017-3-git-send-email-ruslan.bilovol@ti.com>
Date: Thu, 7 Feb 2013 00:50:49 +0200
From: Ruslan Bilovol <ruslan.bilovol@...com>
To: tony@...mide.com, linux@....linux.org.uk,
linux-arm-kernel@...ts.infradead.org, linux-omap@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: [PATCH v3 2/2] ARM: OMAP2+: Export SoC information to userspace
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 <ruslan.bilovol@...com>
---
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 <linux/kernel.h>
#include <linux/init.h>
#include <linux/io.h>
+#include <linux/slab.h>
+
+#ifdef CONFIG_SOC_BUS
+#include <linux/sys_soc.h>
+#endif
#include <asm/cputype.h>
@@ -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
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists