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nvmem: mtk-efuse: remove nvmem regmap dependency

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Regmap raw accessors are bus specific implementations, using regmap raw
apis in nvmem breaks nvmem providers based on regmap mmio.
This patch moves to nvmem support in the driver to use callback
instead of regmap, which is what the nvmem core supports now.

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 2016-05-02 19:36:13 +01:00 committed by Greg Kroah-Hartman
parent 194c8581eb
commit ba360fd040
2 changed files with 32 additions and 16 deletions
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1
drivers/nvmem/Kconfig
View File

@ -50,7 +50,6 @@ config MTK_EFUSE
tristate "Mediatek SoCs EFUSE support"
depends on ARCH_MEDIATEK || COMPILE_TEST
depends on HAS_IOMEM
select REGMAP_MMIO
help
This is a driver to access hardware related data like sensor
calibration, HDMI impedance etc.

47
drivers/nvmem/mtk-efuse.c
View File

@ -14,15 +14,35 @@
#include <linux/device.h>
#include <linux/module.h>
#include <linux/io.h>
#include <linux/nvmem-provider.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
static struct regmap_config mtk_regmap_config = {
.reg_bits = 32,
.val_bits = 32,
.reg_stride = 4,
};
static int mtk_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;
while (words--)
*val++ = readl(base + reg + (i++ * 4));
return 0;
}
static int mtk_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;
while (words--)
writel(*val++, base + reg + (i++ * 4));
return 0;
}
static int mtk_efuse_probe(struct platform_device *pdev)
{
@ -30,7 +50,6 @@ static int mtk_efuse_probe(struct platform_device *pdev)
struct resource *res;
struct nvmem_device *nvmem;
struct nvmem_config *econfig;
struct regmap *regmap;
void __iomem *base;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
@ -42,14 +61,12 @@ static int mtk_efuse_probe(struct platform_device *pdev)
if (!econfig)
return -ENOMEM;
mtk_regmap_config.max_register = resource_size(res) - 1;
regmap = devm_regmap_init_mmio(dev, base, &mtk_regmap_config);
if (IS_ERR(regmap)) {
dev_err(dev, "regmap init failed\n");
return PTR_ERR(regmap);
}
econfig->stride = 4;
econfig->word_size = 4;
econfig->reg_read = mtk_reg_read;
econfig->reg_write = mtk_reg_write;
econfig->size = resource_size(res);
econfig->priv = base;
econfig->dev = dev;
econfig->owner = THIS_MODULE;
nvmem = nvmem_register(econfig);