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nvmem: sunxi-sid: remove nvmem regmap dependency

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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>
This commit is contained in:
Srinivas Kandagatla 2016-04-24 20:28:10 +01:00 committed by Greg Kroah-Hartman
parent 2c0235c604
commit 9c7b16eb35
2 changed files with 9 additions and 46 deletions
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1
drivers/nvmem/Kconfig
View file

@ -83,7 +83,6 @@ config ROCKCHIP_EFUSE
config NVMEM_SUNXI_SID
tristate "Allwinner SoCs SID support"
depends on ARCH_SUNXI
select REGMAP_MMIO
help
This is a driver for the 'security ID' available on various Allwinner
devices.

54
drivers/nvmem/sunxi_sid.c
View file

@ -21,13 +21,14 @@
#include <linux/nvmem-provider.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/slab.h>
#include <linux/random.h>
static struct nvmem_config econfig = {
.name = "sunxi-sid",
.read_only = true,
.stride = 4,
.word_size = 1,
.owner = THIS_MODULE,
};
@ -51,54 +52,23 @@ static u8 sunxi_sid_read_byte(const struct sunxi_sid *sid,
return sid_key; /* Only return the last byte */
}
static int sunxi_sid_read(void *context,
const void *reg, size_t reg_size,
void *val, size_t val_size)
static int sunxi_sid_read(void *context, unsigned int offset,
void *val, size_t bytes)
{
struct sunxi_sid *sid = context;
unsigned int offset = *(u32 *)reg;
u8 *buf = val;
while (val_size) {
*buf++ = sunxi_sid_read_byte(sid, offset);
val_size--;
offset++;
}
while (bytes--)
*buf++ = sunxi_sid_read_byte(sid, offset++);
return 0;
}
static int sunxi_sid_write(void *context, const void *data, size_t count)
{
/* Unimplemented, dummy to keep regmap core happy */
return 0;
}
static struct regmap_bus sunxi_sid_bus = {
.read = sunxi_sid_read,
.write = sunxi_sid_write,
.reg_format_endian_default = REGMAP_ENDIAN_NATIVE,
.val_format_endian_default = REGMAP_ENDIAN_NATIVE,
};
static bool sunxi_sid_writeable_reg(struct device *dev, unsigned int reg)
{
return false;
}
static struct regmap_config sunxi_sid_regmap_config = {
.reg_bits = 32,
.val_bits = 8,
.reg_stride = 1,
.writeable_reg = sunxi_sid_writeable_reg,
};
static int sunxi_sid_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct resource *res;
struct nvmem_device *nvmem;
struct regmap *regmap;
struct sunxi_sid *sid;
int ret, i, size;
char *randomness;
@ -113,16 +83,10 @@ static int sunxi_sid_probe(struct platform_device *pdev)
return PTR_ERR(sid->base);
size = resource_size(res) - 1;
sunxi_sid_regmap_config.max_register = size;
regmap = devm_regmap_init(dev, &sunxi_sid_bus, sid,
&sunxi_sid_regmap_config);
if (IS_ERR(regmap)) {
dev_err(dev, "regmap init failed\n");
return PTR_ERR(regmap);
}
econfig.size = resource_size(res);
econfig.dev = dev;
econfig.reg_read = sunxi_sid_read;
econfig.priv = sid;
nvmem = nvmem_register(&econfig);
if (IS_ERR(nvmem))
return PTR_ERR(nvmem);