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soc: brcmstb: add SoC driver to brcmstb

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Value of soc_dev_attributes:
* family = chip family id
* soc_id = product id
* revision = product revision

Signed-off-by: Justin Chen <justin.chen@broadcom.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
This commit is contained in:
Justin Chen 2016-03-23 11:56:50 -07:00 committed by Florian Fainelli
parent f55532a0c0
commit cef4bafcea
2 changed files with 59 additions and 0 deletions
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1
arch/arm/mach-bcm/Kconfig
View file

@ -179,6 +179,7 @@ config ARCH_BRCMSTB
select ARCH_DMA_ADDR_T_64BIT if ARM_LPAE
select ARCH_WANT_OPTIONAL_GPIOLIB
select SOC_BRCMSTB
select SOC_BUS
help
Say Y if you intend to run the kernel on a Broadcom ARM-based STB
chipset.

58
drivers/soc/brcmstb/common.c
View file

@ -12,10 +12,18 @@
* GNU General Public License for more details.
*/
#include <linux/io.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/slab.h>
#include <linux/soc/brcmstb/brcmstb.h>
#include <linux/sys_soc.h>
#include <soc/brcmstb/common.h>
static u32 family_id;
static u32 product_id;
static const struct of_device_id brcmstb_machine_match[] = {
{ .compatible = "brcm,brcmstb", },
{ }
@ -31,3 +39,53 @@ bool soc_is_brcmstb(void)
return of_match_node(brcmstb_machine_match, root) != NULL;
}
static const struct of_device_id sun_top_ctrl_match[] = {
{ .compatible = "brcm,brcmstb-sun-top-ctrl", },
{ }
};
static int __init brcmstb_soc_device_init(void)
{
struct soc_device_attribute *soc_dev_attr;
struct soc_device *soc_dev;
struct device_node *sun_top_ctrl;
void __iomem *sun_top_ctrl_base;
sun_top_ctrl = of_find_matching_node(NULL, sun_top_ctrl_match);
if (!sun_top_ctrl)
return -ENODEV;
sun_top_ctrl_base = of_iomap(sun_top_ctrl, 0);
if (!sun_top_ctrl_base)
return -ENODEV;
family_id = readl(sun_top_ctrl_base);
product_id = readl(sun_top_ctrl_base + 0x4);
soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
if (!soc_dev_attr)
return -ENOMEM;
soc_dev_attr->family = kasprintf(GFP_KERNEL, "%x",
family_id >> 28 ?
family_id >> 16 : family_id >> 8);
soc_dev_attr->soc_id = kasprintf(GFP_KERNEL, "%x",
product_id >> 28 ?
product_id >> 16 : product_id >> 8);
soc_dev_attr->revision = kasprintf(GFP_KERNEL, "%c%d",
((product_id & 0xf0) >> 4) + 'A',
product_id & 0xf);
soc_dev = soc_device_register(soc_dev_attr);
if (IS_ERR(soc_dev)) {
kfree(soc_dev_attr->family);
kfree(soc_dev_attr->soc_id);
kfree(soc_dev_attr->revision);
kfree(soc_dev_attr);
return -ENODEV;
}
return 0;
}
arch_initcall(brcmstb_soc_device_init);