nvmem: 93xx46: 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/misc/eeprom/eeprom_93xx46.c b/drivers/misc/eeprom/eeprom_93xx46.c
index 426fe2fd5238c8f529c94f3c7ce0be8289e55def..5004d72c9f42fc30574912d02b34ee5803e997d9 100644 (file)
--- a/drivers/misc/eeprom/eeprom_93xx46.c
+++ b/drivers/misc/eeprom/eeprom_93xx46.c
@@ -20,7 +20,6 @@
 #include <linux/slab.h>
 #include <linux/spi/spi.h>
 #include <linux/nvmem-provider.h>
-#include <linux/regmap.h>
 #include <linux/eeprom_93xx46.h>
 
 #define OP_START       0x4
@@ -43,7 +42,6 @@ struct eeprom_93xx46_dev {
        struct spi_device *spi;
        struct eeprom_93xx46_platform_data *pdata;
        struct mutex lock;
-       struct regmap_config regmap_config;
        struct nvmem_config nvmem_config;
        struct nvmem_device *nvmem;
        int addrlen;
@@ -60,11 +58,12 @@ static inline bool has_quirk_instruction_length(struct eeprom_93xx46_dev *edev)
        return edev->pdata->quirks & EEPROM_93XX46_QUIRK_INSTRUCTION_LENGTH;
 }
 
-static ssize_t
-eeprom_93xx46_read(struct eeprom_93xx46_dev *edev, char *buf,
-                  unsigned off, size_t count)
+static int eeprom_93xx46_read(void *priv, unsigned int off,
+                             void *val, size_t count)
 {
-       ssize_t ret = 0;
+       struct eeprom_93xx46_dev *edev = priv;
+       char *buf = val;
+       int err = 0;
 
        if (unlikely(off >= edev->size))
                return 0;
@@ -84,7 +83,6 @@ eeprom_93xx46_read(struct eeprom_93xx46_dev *edev, char *buf,
                u16 cmd_addr = OP_READ << edev->addrlen;
                size_t nbytes = count;
                int bits;
-               int err;
 
                if (edev->addrlen == 7) {
                        cmd_addr |= off & 0x7f;
@@ -120,21 +118,20 @@ eeprom_93xx46_read(struct eeprom_93xx46_dev *edev, char *buf,
                if (err) {
                        dev_err(&edev->spi->dev, "read %zu bytes at %d: err. %d\n",
                                nbytes, (int)off, err);
-                       ret = err;
                        break;
                }
 
                buf += nbytes;
                off += nbytes;
                count -= nbytes;
-               ret += nbytes;
        }
 
        if (edev->pdata->finish)
                edev->pdata->finish(edev);
 
        mutex_unlock(&edev->lock);
-       return ret;
+
+       return err;
 }
 
 static int eeprom_93xx46_ew(struct eeprom_93xx46_dev *edev, int is_on)
@@ -230,10 +227,11 @@ eeprom_93xx46_write_word(struct eeprom_93xx46_dev *edev,
        return ret;
 }
 
-static ssize_t
-eeprom_93xx46_write(struct eeprom_93xx46_dev *edev, const char *buf,
-                   loff_t off, size_t count)
+static int eeprom_93xx46_write(void *priv, unsigned int off,
+                                  void *val, size_t count)
 {
+       struct eeprom_93xx46_dev *edev = priv;
+       char *buf = val;
        int i, ret, step = 1;
 
        if (unlikely(off >= edev->size))
@@ -275,52 +273,9 @@ eeprom_93xx46_write(struct eeprom_93xx46_dev *edev, const char *buf,
 
        /* erase/write disable */
        eeprom_93xx46_ew(edev, 0);
-       return ret ? : count;
-}
-
-/*
- * Provide a regmap interface, which is registered with the NVMEM
- * framework
-*/
-static int eeprom_93xx46_regmap_read(void *context, const void *reg,
-                                    size_t reg_size, void *val,
-                                    size_t val_size)
-{
-       struct eeprom_93xx46_dev *eeprom_93xx46 = context;
-       off_t offset = *(u32 *)reg;
-       int err;
-
-       err = eeprom_93xx46_read(eeprom_93xx46, val, offset, val_size);
-       if (err)
-               return err;
-       return 0;
-}
-
-static int eeprom_93xx46_regmap_write(void *context, const void *data,
-                                     size_t count)
-{
-       struct eeprom_93xx46_dev *eeprom_93xx46 = context;
-       const char *buf;
-       u32 offset;
-       size_t len;
-       int err;
-
-       memcpy(&offset, data, sizeof(offset));
-       buf = (const char *)data + sizeof(offset);
-       len = count - sizeof(offset);
-
-       err = eeprom_93xx46_write(eeprom_93xx46, buf, offset, len);
-       if (err)
-               return err;
-       return 0;
+       return ret;
 }
 
-static const struct regmap_bus eeprom_93xx46_regmap_bus = {
-       .read = eeprom_93xx46_regmap_read,
-       .write = eeprom_93xx46_regmap_write,
-       .reg_format_endian_default = REGMAP_ENDIAN_NATIVE,
-};
-
 static int eeprom_93xx46_eral(struct eeprom_93xx46_dev *edev)
 {
        struct eeprom_93xx46_platform_data *pd = edev->pdata;
@@ -480,7 +435,6 @@ static int eeprom_93xx46_probe(struct spi_device *spi)
 {
        struct eeprom_93xx46_platform_data *pd;
        struct eeprom_93xx46_dev *edev;
-       struct regmap *regmap;
        int err;
 
        if (spi->dev.of_node) {
@@ -515,20 +469,6 @@ static int eeprom_93xx46_probe(struct spi_device *spi)
        edev->pdata = pd;
 
        edev->size = 128;
-
-       edev->regmap_config.reg_bits = 32;
-       edev->regmap_config.val_bits = 8;
-       edev->regmap_config.reg_stride = 1;
-       edev->regmap_config.max_register = edev->size - 1;
-
-       regmap = devm_regmap_init(&spi->dev, &eeprom_93xx46_regmap_bus, edev,
-                                 &edev->regmap_config);
-       if (IS_ERR(regmap)) {
-               dev_err(&spi->dev, "regmap init failed\n");
-               err = PTR_ERR(regmap);
-               goto fail;
-       }
-
        edev->nvmem_config.name = dev_name(&spi->dev);
        edev->nvmem_config.dev = &spi->dev;
        edev->nvmem_config.read_only = pd->flags & EE_READONLY;
@@ -536,6 +476,12 @@ static int eeprom_93xx46_probe(struct spi_device *spi)
        edev->nvmem_config.owner = THIS_MODULE;
        edev->nvmem_config.compat = true;
        edev->nvmem_config.base_dev = &spi->dev;
+       edev->nvmem_config.reg_read = eeprom_93xx46_read;
+       edev->nvmem_config.reg_write = eeprom_93xx46_write;
+       edev->nvmem_config.priv = edev;
+       edev->nvmem_config.stride = 4;
+       edev->nvmem_config.word_size = 1;
+       edev->nvmem_config.size = edev->size;
 
        edev->nvmem = nvmem_register(&edev->nvmem_config);
        if (IS_ERR(edev->nvmem)) {