nvmem: sc27xx: add sc2730 efuse support

Add support to the new efuse IP which is integrated in the SC2730
which includes multiple blocks in a single chip.

Signed-off-by: Freeman Liu <freeman.liu@unisoc.com>
Signed-off-by: Chunyan Zhang <chunyan.zhang@unisoc.com>
Reviewed-by: Baolin Wang <baolin.wang7@gmail.com>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20200722100705.7772-5-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/nvmem/sc27xx-efuse.c b/drivers/nvmem/sc27xx-efuse.c
index ab5e7e0..c825fc9 100644 (file)
--- a/drivers/nvmem/sc27xx-efuse.c
+++ b/drivers/nvmem/sc27xx-efuse.c
@@ -4,12 +4,14 @@
 #include <linux/hwspinlock.h>
 #include <linux/module.h>
 #include <linux/of.h>
+#include <linux/of_device.h>
 #include <linux/platform_device.h>
 #include <linux/regmap.h>
 #include <linux/nvmem-provider.h>
 
 /* PMIC global registers definition */
 #define SC27XX_MODULE_EN               0xc08
+#define SC2730_MODULE_EN               0x1808
 #define SC27XX_EFUSE_EN                        BIT(6)
 
 /* Efuse controller registers definition */
@@ -49,12 +51,29 @@
 #define SC27XX_EFUSE_POLL_TIMEOUT      3000000
 #define SC27XX_EFUSE_POLL_DELAY_US     10000
 
+/*
+ * Since different PMICs of SC27xx series can have different
+ * address , we should save address in the device data structure.
+ */
+struct sc27xx_efuse_variant_data {
+       u32 module_en;
+};
+
 struct sc27xx_efuse {
        struct device *dev;
        struct regmap *regmap;
        struct hwspinlock *hwlock;
        struct mutex mutex;
        u32 base;
+       const struct sc27xx_efuse_variant_data *var_data;
+};
+
+static const struct sc27xx_efuse_variant_data sc2731_edata = {
+       .module_en = SC27XX_MODULE_EN,
+};
+
+static const struct sc27xx_efuse_variant_data sc2730_edata = {
+       .module_en = SC2730_MODULE_EN,
 };
 
 /*
@@ -119,7 +138,7 @@ static int sc27xx_efuse_read(void *context, u32 offset, void *val, size_t bytes)
                return ret;
 
        /* Enable the efuse controller. */
-       ret = regmap_update_bits(efuse->regmap, SC27XX_MODULE_EN,
+       ret = regmap_update_bits(efuse->regmap, efuse->var_data->module_en,
                                 SC27XX_EFUSE_EN, SC27XX_EFUSE_EN);
        if (ret)
                goto unlock_efuse;
@@ -169,7 +188,7 @@ static int sc27xx_efuse_read(void *context, u32 offset, void *val, size_t bytes)
 
 disable_efuse:
        /* Disable the efuse controller after reading. */
-       regmap_update_bits(efuse->regmap, SC27XX_MODULE_EN, SC27XX_EFUSE_EN, 0);
+       regmap_update_bits(efuse->regmap, efuse->var_data->module_en, SC27XX_EFUSE_EN, 0);
 unlock_efuse:
        sc27xx_efuse_unlock(efuse);
 
@@ -219,6 +238,7 @@ static int sc27xx_efuse_probe(struct platform_device *pdev)
 
        mutex_init(&efuse->mutex);
        efuse->dev = &pdev->dev;
+       efuse->var_data = of_device_get_match_data(&pdev->dev);
 
        econfig.stride = 1;
        econfig.word_size = 1;
@@ -238,7 +258,8 @@ static int sc27xx_efuse_probe(struct platform_device *pdev)
 }
 
 static const struct of_device_id sc27xx_efuse_of_match[] = {
-       { .compatible = "sprd,sc2731-efuse" },
+       { .compatible = "sprd,sc2731-efuse", .data = &sc2731_edata},
+       { .compatible = "sprd,sc2730-efuse", .data = &sc2730_edata},
        { }
 };