Expose Tegra chip ID and revision in /sys/devices/soc for user mode
usage
Signed-off-by: Danny Huang <dahuang@xxxxxxxxxx>
---
arch/arm/mach-tegra/Kconfig | 3 +++
arch/arm/mach-tegra/common.c | 23 +++++++++++++++++++++++
2 files changed, 26 insertions(+)
diff --git a/arch/arm/mach-tegra/Kconfig b/arch/arm/mach-tegra/Kconfig
index d1c4893..b7abcfa 100644
--- a/arch/arm/mach-tegra/Kconfig
+++ b/arch/arm/mach-tegra/Kconfig
@@ -17,6 +17,7 @@ config ARCH_TEGRA_2x_SOC
select PINCTRL_TEGRA20
select PL310_ERRATA_727915 if CACHE_L2X0
select PL310_ERRATA_769419 if CACHE_L2X0
+ select SOC_BUS
select USB_ARCH_HAS_EHCI if USB_SUPPORT
select USB_ULPI if USB
select USB_ULPI_VIEWPORT if USB_SUPPORT
@@ -36,6 +37,7 @@ config ARCH_TEGRA_3x_SOC
select PINCTRL
select PINCTRL_TEGRA30
select PL310_ERRATA_769419 if CACHE_L2X0
+ select SOC_BUS
select USB_ARCH_HAS_EHCI if USB_SUPPORT
select USB_ULPI if USB
select USB_ULPI_VIEWPORT if USB_SUPPORT
@@ -51,6 +53,7 @@ config ARCH_TEGRA_114_SOC
select CPU_V7
select PINCTRL
select PINCTRL_TEGRA114
+ select SOC_BUS
help
Support for NVIDIA Tegra T114 processor family, based on the
ARM CortexA15MP CPU
diff --git a/arch/arm/mach-tegra/common.c b/arch/arm/mach-tegra/common.c
index f0315c9..9547c59 100644
--- a/arch/arm/mach-tegra/common.c
+++ b/arch/arm/mach-tegra/common.c
@@ -23,6 +23,8 @@
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/irqchip.h>
+#include <linux/slab.h>
+#include <linux/sys_soc.h>
#include <linux/clk/tegra.h>
#include <asm/hardware/cache-l2x0.h>
@@ -94,6 +96,26 @@ static void __init tegra_init_cache(void)
}
+void __init tegra_soc_device_init(void)
+{
+ 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->soc_id = kasprintf(GFP_KERNEL, "%d", tegra_chip_id);
+ soc_dev_attr->revision = kasprintf(GFP_KERNEL, "%d", tegra_revision);
+ soc_dev_attr->family = kasprintf(GFP_KERNEL, "Tegra");
+
+ soc_dev = soc_device_register(soc_dev_attr);
+ if (IS_ERR_OR_NULL(soc_dev))
+ kfree(soc_dev_attr);
+
+ return;
+}
+
void __init tegra_init_early(void)
{
tegra_cpu_reset_handler_init();
@@ -108,4 +130,5 @@ void __init tegra_init_early(void)
void __init tegra_init_late(void)
{
tegra_powergate_debugfs_init();
+ tegra_soc_device_init();
}
--
1.8.1.5
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