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misc: eeprom_93xx46: Add new 93c56 and 93c66 compatible strings 

These two devices have respectively 2048 and 4096 bits of storage,
compared to 1024 for the 93c46.

Reviewed-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
Signed-off-by: Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
Link: https://lore.kernel.org/r/20210511210727.24895-3-linkmauve@linkmauve.fr
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Emmanuel Gil Peyrot 2021-05-11 23:07:25 +02:00 committed by Greg Kroah-Hartman
parent 4a5ff99bbb
commit 14374fbb3f
2 changed files with 35 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

33
drivers/misc/eeprom/eeprom_93xx46.c
View File

@ -29,14 +29,29 @@
struct eeprom_93xx46_devtype_data {
unsigned int quirks;
unsigned char flags;
};
static const struct eeprom_93xx46_devtype_data at93c46_data = {
.flags = EE_SIZE1K,
};
static const struct eeprom_93xx46_devtype_data at93c56_data = {
.flags = EE_SIZE2K,
};
static const struct eeprom_93xx46_devtype_data at93c66_data = {
.flags = EE_SIZE4K,
};
static const struct eeprom_93xx46_devtype_data atmel_at93c46d_data = {
.flags = EE_SIZE1K,
.quirks = EEPROM_93XX46_QUIRK_SINGLE_WORD_READ |
EEPROM_93XX46_QUIRK_INSTRUCTION_LENGTH,
};
static const struct eeprom_93xx46_devtype_data microchip_93lc46b_data = {
.flags = EE_SIZE1K,
.quirks = EEPROM_93XX46_QUIRK_EXTRA_READ_CYCLE,
};
@ -381,8 +396,11 @@ static void select_deassert(void *context)
}
static const struct of_device_id eeprom_93xx46_of_table[] = {
{ .compatible = "eeprom-93xx46", },
{ .compatible = "eeprom-93xx46", .data = &at93c46_data, },
{ .compatible = "atmel,at93c46", .data = &at93c46_data, },
{ .compatible = "atmel,at93c46d", .data = &atmel_at93c46d_data, },
{ .compatible = "atmel,at93c56", .data = &at93c56_data, },
{ .compatible = "atmel,at93c66", .data = &at93c66_data, },
{ .compatible = "microchip,93lc46b", .data = &microchip_93lc46b_data, },
{}
};
@ -432,6 +450,7 @@ static int eeprom_93xx46_probe_dt(struct spi_device *spi)
const struct eeprom_93xx46_devtype_data *data = of_id->data;
pd->quirks = data->quirks;
pd->flags |= data->flags;
}
spi->dev.platform_data = pd;
@ -461,7 +480,16 @@ static int eeprom_93xx46_probe(struct spi_device *spi)
if (!edev)
return -ENOMEM;
if (pd->flags & EE_SIZE1K)
edev->size = 128;
else if (pd->flags & EE_SIZE2K)
edev->size = 256;
else if (pd->flags & EE_SIZE4K)
edev->size = 512;
else {
dev_err(&spi->dev, "unspecified size\n");
return -EINVAL;
}
if (pd->flags & EE_ADDR8)
edev->addrlen = ilog2(edev->size);
@ -496,8 +524,9 @@ static int eeprom_93xx46_probe(struct spi_device *spi)
if (IS_ERR(edev->nvmem))
return PTR_ERR(edev->nvmem);
dev_info(&spi->dev, "%d-bit eeprom %s\n",
dev_info(&spi->dev, "%d-bit eeprom containing %d bytes %s\n",
(pd->flags & EE_ADDR8) ? 8 : 16,
edev->size,
(pd->flags & EE_READONLY) ? "(readonly)" : "");
if (!(pd->flags & EE_READONLY)) {

3
include/linux/eeprom_93xx46.h
View File

@ -10,6 +10,9 @@ struct eeprom_93xx46_platform_data {
#define EE_ADDR8 0x01 /* 8 bit addr. cfg */
#define EE_ADDR16 0x02 /* 16 bit addr. cfg */
#define EE_READONLY 0x08 /* forbid writing */
#define EE_SIZE1K 0x10 /* 1 kb of data, that is a 93xx46 */
#define EE_SIZE2K 0x20 /* 2 kb of data, that is a 93xx56 */
#define EE_SIZE4K 0x40 /* 4 kb of data, that is a 93xx66 */
unsigned int quirks;
/* Single word read transfers only; no sequential read. */