nvmem: imx-ocotp: remove nvmem regmap dependency

This patch moves to nvmem support in the driver to use callback
instead of regmap.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/nvmem/imx-ocotp.c b/drivers/nvmem/imx-ocotp.c
index d7796eb5421ff0d4c01a3dbc87f76a065bf5d5ee..75e66ef5b0ecb8045595139bb4ffd3d2970930a8 100644 (file)
--- a/drivers/nvmem/imx-ocotp.c
+++ b/drivers/nvmem/imx-ocotp.c
@@ -22,7 +22,6 @@
 #include <linux/of.h>
 #include <linux/of_device.h>
 #include <linux/platform_device.h>
-#include <linux/regmap.h>
 #include <linux/slab.h>
 
 struct ocotp_priv {
@@ -31,59 +30,34 @@ struct ocotp_priv {
        unsigned int nregs;
 };
 
-static int imx_ocotp_read(void *context, const void *reg, size_t reg_size,
-                         void *val, size_t val_size)
+static int imx_ocotp_read(void *context, unsigned int offset,
+                         void *val, size_t bytes)
 {
        struct ocotp_priv *priv = context;
-       unsigned int offset = *(u32 *)reg;
        unsigned int count;
+       u32 *buf = val;
        int i;
        u32 index;
 
        index = offset >> 2;
-       count = val_size >> 2;
+       count = bytes >> 2;
 
        if (count > (priv->nregs - index))
                count = priv->nregs - index;
 
-       for (i = index; i < (index + count); i++) {
-               *(u32 *)val = readl(priv->base + 0x400 + i * 0x10);
-               val += 4;
-       }
+       for (i = index; i < (index + count); i++)
+               *buf++ = readl(priv->base + 0x400 + i * 0x10);
 
        return 0;
 }
 
-static int imx_ocotp_write(void *context, const void *data, size_t count)
-{
-       /* Not implemented */
-       return 0;
-}
-
-static struct regmap_bus imx_ocotp_bus = {
-       .read = imx_ocotp_read,
-       .write = imx_ocotp_write,
-       .reg_format_endian_default = REGMAP_ENDIAN_NATIVE,
-       .val_format_endian_default = REGMAP_ENDIAN_NATIVE,
-};
-
-static bool imx_ocotp_writeable_reg(struct device *dev, unsigned int reg)
-{
-       return false;
-}
-
-static struct regmap_config imx_ocotp_regmap_config = {
-       .reg_bits = 32,
-       .val_bits = 32,
-       .reg_stride = 4,
-       .writeable_reg = imx_ocotp_writeable_reg,
-       .name = "imx-ocotp",
-};
-
 static struct nvmem_config imx_ocotp_nvmem_config = {
        .name = "imx-ocotp",
        .read_only = true,
+       .word_size = 4,
+       .stride = 4,
        .owner = THIS_MODULE,
+       .reg_read = imx_ocotp_read,
 };
 
 static const struct of_device_id imx_ocotp_dt_ids[] = {
@@ -99,7 +73,6 @@ static int imx_ocotp_probe(struct platform_device *pdev)
        const struct of_device_id *of_id;
        struct device *dev = &pdev->dev;
        struct resource *res;
-       struct regmap *regmap;
        struct ocotp_priv *priv;
        struct nvmem_device *nvmem;
 
@@ -114,15 +87,9 @@ static int imx_ocotp_probe(struct platform_device *pdev)
 
        of_id = of_match_device(imx_ocotp_dt_ids, dev);
        priv->nregs = (unsigned int)of_id->data;
-       imx_ocotp_regmap_config.max_register = 4 * priv->nregs - 4;
-
-       regmap = devm_regmap_init(dev, &imx_ocotp_bus, priv,
-                                 &imx_ocotp_regmap_config);
-       if (IS_ERR(regmap)) {
-               dev_err(dev, "regmap init failed\n");
-               return PTR_ERR(regmap);
-       }
+       imx_ocotp_nvmem_config.size = 4 * priv->nregs;
        imx_ocotp_nvmem_config.dev = dev;
+       imx_ocotp_nvmem_config.priv = priv;
        nvmem = nvmem_register(&imx_ocotp_nvmem_config);
        if (IS_ERR(nvmem))
                return PTR_ERR(nvmem);