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Commit d591fdf8 authored by Danny Huang's avatar Danny Huang Committed by Stephen Warren
Browse files

ARM: tegra: expose chip ID and revision 



Expose Tegra chip ID and revision in /sys/devices/soc for user mode
usage

Signed-off-by: default avatarDanny Huang <dahuang@nvidia.com>
Signed-off-by: default avatarStephen Warren <swarren@nvidia.com>
parent e562b865

arch/arm/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -675,6 +675,7 @@ config ARCH_TEGRA 
	select HAVE_CLK

	select HAVE_SMP

	select MIGHT_HAVE_CACHE_L2X0

	select SOC_BUS

	select SPARSE_IRQ

	select USE_OF

	help

arch/arm/mach-tegra/tegra.c

+28 −1
Original line number Diff line number Diff line
@@ -33,6 +33,8 @@ 
#include <linux/io.h>

#include <linux/i2c.h>

#include <linux/i2c-tegra.h>

#include <linux/slab.h>

#include <linux/sys_soc.h>

#include <linux/usb/tegra_usb_phy.h>



#include <asm/mach-types.h>
@@ -42,6 +44,7 @@ 


#include "board.h"

#include "common.h"

#include "fuse.h"

#include "iomap.h"



static struct tegra_ehci_platform_data tegra_ehci1_pdata = {
@@ -80,12 +83,36 @@ static struct of_dev_auxdata tegra20_auxdata_lookup[] __initdata = { 


static void __init tegra_dt_init(void)

{

	struct soc_device_attribute *soc_dev_attr;

	struct soc_device *soc_dev;

	struct device *parent = NULL;



	soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);

	if (!soc_dev_attr)

		goto out;



	soc_dev_attr->family = kasprintf(GFP_KERNEL, "Tegra");

	soc_dev_attr->revision = kasprintf(GFP_KERNEL, "%d", tegra_revision);

	soc_dev_attr->soc_id = kasprintf(GFP_KERNEL, "%d", tegra_chip_id);



	soc_dev = soc_device_register(soc_dev_attr);

	if (IS_ERR(soc_dev)) {

		kfree(soc_dev_attr->family);

		kfree(soc_dev_attr->revision);

		kfree(soc_dev_attr->soc_id);

		kfree(soc_dev_attr);

		goto out;

	}



	parent = soc_device_to_device(soc_dev);



	/*

	 * Finished with the static registrations now; fill in the missing

	 * devices

	 */

out:

	of_platform_populate(NULL, of_default_bus_match_table,

				tegra20_auxdata_lookup, NULL);

				tegra20_auxdata_lookup, parent);

}



static void __init trimslice_init(void)