diff options
Diffstat (limited to 'drivers/misc/eeprom')
| -rw-r--r-- | drivers/misc/eeprom/eeprom_93xx46.c | 90 |
1 files changed, 18 insertions, 72 deletions
diff --git a/drivers/misc/eeprom/eeprom_93xx46.c b/drivers/misc/eeprom/eeprom_93xx46.c index 426fe2f..5004d72 100644 --- a/drivers/misc/eeprom/eeprom_93xx46.c +++ b/drivers/misc/eeprom/eeprom_93xx46.c @@ -20,7 +20,6 @@ #include <linux/slab.h> #include <linux/spi/spi.h> #include <linux/nvmem-provider.h> -#include <linux/regmap.h> #include <linux/eeprom_93xx46.h> #define OP_START 0x4 @@ -43,7 +42,6 @@ struct eeprom_93xx46_dev { struct spi_device *spi; struct eeprom_93xx46_platform_data *pdata; struct mutex lock; - struct regmap_config regmap_config; struct nvmem_config nvmem_config; struct nvmem_device *nvmem; int addrlen; @@ -60,11 +58,12 @@ static inline bool has_quirk_instruction_length(struct eeprom_93xx46_dev *edev) return edev->pdata->quirks & EEPROM_93XX46_QUIRK_INSTRUCTION_LENGTH; } -static ssize_t -eeprom_93xx46_read(struct eeprom_93xx46_dev *edev, char *buf, - unsigned off, size_t count) +static int eeprom_93xx46_read(void *priv, unsigned int off, + void *val, size_t count) { - ssize_t ret = 0; + struct eeprom_93xx46_dev *edev = priv; + char *buf = val; + int err = 0; if (unlikely(off >= edev->size)) return 0; @@ -84,7 +83,6 @@ eeprom_93xx46_read(struct eeprom_93xx46_dev *edev, char *buf, u16 cmd_addr = OP_READ << edev->addrlen; size_t nbytes = count; int bits; - int err; if (edev->addrlen == 7) { cmd_addr |= off & 0x7f; @@ -120,21 +118,20 @@ eeprom_93xx46_read(struct eeprom_93xx46_dev *edev, char *buf, if (err) { dev_err(&edev->spi->dev, "read %zu bytes at %d: err. %d\n", nbytes, (int)off, err); - ret = err; break; } buf += nbytes; off += nbytes; count -= nbytes; - ret += nbytes; } if (edev->pdata->finish) edev->pdata->finish(edev); mutex_unlock(&edev->lock); - return ret; + + return err; } static int eeprom_93xx46_ew(struct eeprom_93xx46_dev *edev, int is_on) @@ -230,10 +227,11 @@ eeprom_93xx46_write_word(struct eeprom_93xx46_dev *edev, return ret; } -static ssize_t -eeprom_93xx46_write(struct eeprom_93xx46_dev *edev, const char *buf, - loff_t off, size_t count) +static int eeprom_93xx46_write(void *priv, unsigned int off, + void *val, size_t count) { + struct eeprom_93xx46_dev *edev = priv; + char *buf = val; int i, ret, step = 1; if (unlikely(off >= edev->size)) @@ -275,52 +273,9 @@ eeprom_93xx46_write(struct eeprom_93xx46_dev *edev, const char *buf, /* erase/write disable */ eeprom_93xx46_ew(edev, 0); - return ret ? : count; -} - -/* - * Provide a regmap interface, which is registered with the NVMEM - * framework -*/ -static int eeprom_93xx46_regmap_read(void *context, const void *reg, - size_t reg_size, void *val, - size_t val_size) -{ - struct eeprom_93xx46_dev *eeprom_93xx46 = context; - off_t offset = *(u32 *)reg; - int err; - - err = eeprom_93xx46_read(eeprom_93xx46, val, offset, val_size); - if (err) - return err; - return 0; -} - -static int eeprom_93xx46_regmap_write(void *context, const void *data, - size_t count) -{ - struct eeprom_93xx46_dev *eeprom_93xx46 = context; - const char *buf; - u32 offset; - size_t len; - int err; - - memcpy(&offset, data, sizeof(offset)); - buf = (const char *)data + sizeof(offset); - len = count - sizeof(offset); - - err = eeprom_93xx46_write(eeprom_93xx46, buf, offset, len); - if (err) - return err; - return 0; + return ret; } -static const struct regmap_bus eeprom_93xx46_regmap_bus = { - .read = eeprom_93xx46_regmap_read, - .write = eeprom_93xx46_regmap_write, - .reg_format_endian_default = REGMAP_ENDIAN_NATIVE, -}; - static int eeprom_93xx46_eral(struct eeprom_93xx46_dev *edev) { struct eeprom_93xx46_platform_data *pd = edev->pdata; @@ -480,7 +435,6 @@ static int eeprom_93xx46_probe(struct spi_device *spi) { struct eeprom_93xx46_platform_data *pd; struct eeprom_93xx46_dev *edev; - struct regmap *regmap; int err; if (spi->dev.of_node) { @@ -515,20 +469,6 @@ static int eeprom_93xx46_probe(struct spi_device *spi) edev->pdata = pd; edev->size = 128; - - edev->regmap_config.reg_bits = 32; - edev->regmap_config.val_bits = 8; - edev->regmap_config.reg_stride = 1; - edev->regmap_config.max_register = edev->size - 1; - - regmap = devm_regmap_init(&spi->dev, &eeprom_93xx46_regmap_bus, edev, - &edev->regmap_config); - if (IS_ERR(regmap)) { - dev_err(&spi->dev, "regmap init failed\n"); - err = PTR_ERR(regmap); - goto fail; - } - edev->nvmem_config.name = dev_name(&spi->dev); edev->nvmem_config.dev = &spi->dev; edev->nvmem_config.read_only = pd->flags & EE_READONLY; @@ -536,6 +476,12 @@ static int eeprom_93xx46_probe(struct spi_device *spi) edev->nvmem_config.owner = THIS_MODULE; edev->nvmem_config.compat = true; edev->nvmem_config.base_dev = &spi->dev; + edev->nvmem_config.reg_read = eeprom_93xx46_read; + edev->nvmem_config.reg_write = eeprom_93xx46_write; + edev->nvmem_config.priv = edev; + edev->nvmem_config.stride = 4; + edev->nvmem_config.word_size = 1; + edev->nvmem_config.size = edev->size; edev->nvmem = nvmem_register(&edev->nvmem_config); if (IS_ERR(edev->nvmem)) { |