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authorVivek Gautam <vivek.gautam@codeaurora.org>2017-01-04 17:18:09 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-01-04 18:22:47 +0100
commit01d0d2c42a14cee8f619d3e9d571ce3469f5ef51 (patch)
tree3d0e97d8e9686e4a453983312c5cdc73d4753847 /drivers/nvmem/qfprom.c
parentmei: move write cb to completion on credentials failures (diff)
downloadlinux-01d0d2c42a14cee8f619d3e9d571ce3469f5ef51.tar.xz
linux-01d0d2c42a14cee8f619d3e9d571ce3469f5ef51.zip
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>
Diffstat (limited to '')
-rw-r--r--drivers/nvmem/qfprom.c14
1 files changed, 7 insertions, 7 deletions
diff --git a/drivers/nvmem/qfprom.c b/drivers/nvmem/qfprom.c
index b5305f08b184..2bdb6c389328 100644
--- 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,