nvmem: qfprom: Allow single byte accesses for read/write

The nvmem core driver supports to read and write single
byte. So, allow qfprom to support this feature.
This change helps in extracting a required value based
on bit-offset and number of bits for the required value
in the nvmem cell.

Signed-off-by: Vivek Gautam <vivek.gautam@codeaurora.org>
Cc: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/nvmem/qfprom.c b/drivers/nvmem/qfprom.c
index b5305f0..2bdb6c3 100644 (file)
--- a/drivers/nvmem/qfprom.c
+++ b/drivers/nvmem/qfprom.c
@@ -21,11 +21,11 @@ static int qfprom_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;
+       u8 *val = _val;
+       int i = 0, words = bytes;
 
        while (words--)
-               *val++ = readl(base + reg + (i++ * 4));
+               *val++ = readb(base + reg + i++);
 
        return 0;
 }
@@ -34,11 +34,11 @@ static int qfprom_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;
+       u8 *val = _val;
+       int i = 0, words = bytes;
 
        while (words--)
-               writel(*val++, base + reg + (i++ * 4));
+               writeb(*val++, base + reg + i++);
 
        return 0;
 }
@@ -53,7 +53,7 @@ static int qfprom_remove(struct platform_device *pdev)
 static struct nvmem_config econfig = {
        .name = "qfprom",
        .owner = THIS_MODULE,
-       .stride = 4,
+       .stride = 1,
        .word_size = 1,
        .reg_read = qfprom_reg_read,
        .reg_write = qfprom_reg_write,