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authorSrinivas Kandagatla <srinivas.kandagatla@linaro.org>2016-05-02 19:36:13 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2016-06-25 07:42:55 -0700
commitba360fd040e3417ed1d90e89d681698f82002207 (patch)
tree88539e04e60fff8400d8bc825872f967fa4285d9 /drivers/nvmem/mtk-efuse.c
parent194c8581eb9b6d42e9232c7693d86d2ee3799986 (diff)
nvmem: mtk-efuse: remove nvmem regmap dependency
Regmap raw accessors are bus specific implementations, using regmap raw apis in nvmem breaks nvmem providers based on regmap mmio. This patch moves to nvmem support in the driver to use callback instead of regmap, which is what the nvmem core supports now. Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/nvmem/mtk-efuse.c')
-rw-r--r--drivers/nvmem/mtk-efuse.c47
1 files changed, 32 insertions, 15 deletions
diff --git a/drivers/nvmem/mtk-efuse.c b/drivers/nvmem/mtk-efuse.c
index 9c49369beea5..32fd572e18c5 100644
--- a/drivers/nvmem/mtk-efuse.c
+++ b/drivers/nvmem/mtk-efuse.c
@@ -14,15 +14,35 @@
#include <linux/device.h>
#include <linux/module.h>
+#include <linux/io.h>
#include <linux/nvmem-provider.h>
#include <linux/platform_device.h>
-#include <linux/regmap.h>
-static struct regmap_config mtk_regmap_config = {
- .reg_bits = 32,
- .val_bits = 32,
- .reg_stride = 4,
-};
+static int mtk_reg_read(void *context,
+ unsigned int reg, void *_val, size_t bytes)
+{
+ void __iomem *base = context;
+ u32 *val = _val;
+ int i = 0, words = bytes / 4;
+
+ while (words--)
+ *val++ = readl(base + reg + (i++ * 4));
+
+ return 0;
+}
+
+static int mtk_reg_write(void *context,
+ unsigned int reg, void *_val, size_t bytes)
+{
+ void __iomem *base = context;
+ u32 *val = _val;
+ int i = 0, words = bytes / 4;
+
+ while (words--)
+ writel(*val++, base + reg + (i++ * 4));
+
+ return 0;
+}
static int mtk_efuse_probe(struct platform_device *pdev)
{
@@ -30,7 +50,6 @@ static int mtk_efuse_probe(struct platform_device *pdev)
struct resource *res;
struct nvmem_device *nvmem;
struct nvmem_config *econfig;
- struct regmap *regmap;
void __iomem *base;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
@@ -42,14 +61,12 @@ static int mtk_efuse_probe(struct platform_device *pdev)
if (!econfig)
return -ENOMEM;
- mtk_regmap_config.max_register = resource_size(res) - 1;
-
- regmap = devm_regmap_init_mmio(dev, base, &mtk_regmap_config);
- if (IS_ERR(regmap)) {
- dev_err(dev, "regmap init failed\n");
- return PTR_ERR(regmap);
- }
-
+ econfig->stride = 4;
+ econfig->word_size = 4;
+ econfig->reg_read = mtk_reg_read;
+ econfig->reg_write = mtk_reg_write;
+ econfig->size = resource_size(res);
+ econfig->priv = base;
econfig->dev = dev;
econfig->owner = THIS_MODULE;
nvmem = nvmem_register(econfig);