diff options
Diffstat (limited to 'drivers/soc/samsung/exynos-chipid.c')
| -rw-r--r-- | drivers/soc/samsung/exynos-chipid.c | 34 |
1 files changed, 13 insertions, 21 deletions
diff --git a/drivers/soc/samsung/exynos-chipid.c b/drivers/soc/samsung/exynos-chipid.c index bcf691f2b650..006a95feb618 100644 --- a/drivers/soc/samsung/exynos-chipid.c +++ b/drivers/soc/samsung/exynos-chipid.c @@ -9,16 +9,13 @@ */ #include <linux/io.h> +#include <linux/mfd/syscon.h> #include <linux/of.h> -#include <linux/of_address.h> +#include <linux/regmap.h> #include <linux/slab.h> +#include <linux/soc/samsung/exynos-chipid.h> #include <linux/sys_soc.h> -#define EXYNOS_SUBREV_MASK (0xF << 4) -#define EXYNOS_MAINREV_MASK (0xF << 0) -#define EXYNOS_REV_MASK (EXYNOS_SUBREV_MASK | EXYNOS_MAINREV_MASK) -#define EXYNOS_MASK 0xFFFFF000 - static const struct exynos_soc_id { const char *name; unsigned int id; @@ -51,29 +48,24 @@ static const char * __init product_id_to_soc_id(unsigned int product_id) int __init exynos_chipid_early_init(void) { struct soc_device_attribute *soc_dev_attr; - void __iomem *exynos_chipid_base; struct soc_device *soc_dev; struct device_node *root; - struct device_node *np; + struct regmap *regmap; u32 product_id; u32 revision; + int ret; - /* look up for chipid node */ - np = of_find_compatible_node(NULL, NULL, "samsung,exynos4210-chipid"); - if (!np) - return -ENODEV; - - exynos_chipid_base = of_iomap(np, 0); - of_node_put(np); - - if (!exynos_chipid_base) { - pr_err("Failed to map SoC chipid\n"); - return -ENXIO; + regmap = syscon_regmap_lookup_by_compatible("samsung,exynos4210-chipid"); + if (IS_ERR(regmap)) { + pr_err("Failed to get CHIPID regmap\n"); + return PTR_ERR(regmap); } - product_id = readl_relaxed(exynos_chipid_base); + ret = regmap_read(regmap, EXYNOS_CHIPID_REG_PRO_ID, &product_id); + if (ret < 0) + return ret; + revision = product_id & EXYNOS_REV_MASK; - iounmap(exynos_chipid_base); soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL); if (!soc_dev_attr) |