From 2eef018efb9624b8717945f5e2ea0a1965520956 Mon Sep 17 00:00:00 2001
From: Freeman Liu <freeman.liu@unisoc.com>
Date: Wed, 22 Jul 2020 11:06:55 +0100
Subject: 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>
---
drivers/nvmem/sc27xx-efuse.c | 27 ++++++++++++++++++++++++---
1 file changed, 24 insertions(+), 3 deletions(-)
(limited to 'drivers')
diff --git a/drivers/nvmem/sc27xx-efuse.c b/drivers/nvmem/sc27xx-efuse.c
index ab5e7e0bc3d8..c825fc902d10 100644
--- 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},
{ }
};
--
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