diff options
Diffstat (limited to 'drivers/nvmem')
| -rw-r--r-- | drivers/nvmem/Kconfig | 1 | ||||
| -rw-r--r-- | drivers/nvmem/qfprom.c | 56 |
2 files changed, 37 insertions, 20 deletions
diff --git a/drivers/nvmem/Kconfig b/drivers/nvmem/Kconfig index 15c58a5ff7ec..df05b1a24514 100644 --- a/drivers/nvmem/Kconfig +++ b/drivers/nvmem/Kconfig @@ -62,7 +62,6 @@ config QCOM_QFPROM tristate "QCOM QFPROM Support" depends on ARCH_QCOM || COMPILE_TEST depends on HAS_IOMEM - select REGMAP_MMIO help Say y here to enable QFPROM support. The QFPROM provides access functions for QFPROM data to rest of the drivers via nvmem interface. diff --git a/drivers/nvmem/qfprom.c b/drivers/nvmem/qfprom.c index 3829e5fbf8c3..b5305f08b184 100644 --- a/drivers/nvmem/qfprom.c +++ b/drivers/nvmem/qfprom.c @@ -13,21 +13,35 @@ #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 qfprom_regmap_config = { - .reg_bits = 32, - .val_bits = 8, - .reg_stride = 1, - .val_format_endian = REGMAP_ENDIAN_LITTLE, -}; +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; -static struct nvmem_config econfig = { - .name = "qfprom", - .owner = THIS_MODULE, -}; + while (words--) + *val++ = readl(base + reg + (i++ * 4)); + + return 0; +} + +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; + + while (words--) + writel(*val++, base + reg + (i++ * 4)); + + return 0; +} static int qfprom_remove(struct platform_device *pdev) { @@ -36,12 +50,20 @@ static int qfprom_remove(struct platform_device *pdev) return nvmem_unregister(nvmem); } +static struct nvmem_config econfig = { + .name = "qfprom", + .owner = THIS_MODULE, + .stride = 4, + .word_size = 1, + .reg_read = qfprom_reg_read, + .reg_write = qfprom_reg_write, +}; + static int qfprom_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct resource *res; struct nvmem_device *nvmem; - struct regmap *regmap; void __iomem *base; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); @@ -49,14 +71,10 @@ static int qfprom_probe(struct platform_device *pdev) if (IS_ERR(base)) return PTR_ERR(base); - qfprom_regmap_config.max_register = resource_size(res) - 1; - - regmap = devm_regmap_init_mmio(dev, base, &qfprom_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.priv = base; + nvmem = nvmem_register(&econfig); if (IS_ERR(nvmem)) return PTR_ERR(nvmem); |