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eeprom: at25: allow page sizes greater than 16 bit 

Storage technologies like FRAM have no "write pages", the whole chip can
be written within one SPI transfer. For these chips, the page size can
be set equal to the device size. Currently available devices are already
bigger than 64 kiB.

Signed-off-by: Christian Eggers <ceggers@arri.de>
Link: https://lore.kernel.org/r/20200727111218.26926-1-ceggers@arri.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Christian Eggers 2020-07-27 13:12:18 +02:00 committed by Greg Kroah-Hartman
parent d162219c65
commit d3cd0071a8
2 changed files with 2 additions and 2 deletions
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2
drivers/misc/eeprom/at25.c
View File

@ -261,7 +261,7 @@ static int at25_fw_to_chip(struct device *dev, struct spi_eeprom *chip)
if (device_property_read_u32(dev, "pagesize", &val) == 0 ||
device_property_read_u32(dev, "at25,page-size", &val) == 0) {
chip->page_size = (u16)val;
chip->page_size = val;
} else {
dev_err(dev, "Error: missing \"pagesize\" property\n");
return -ENODEV;

2
include/linux/spi/eeprom.h
View File

@ -14,7 +14,7 @@
struct spi_eeprom {
u32 byte_len;
char name[10];
u16 page_size; /* for writes */
u32 page_size; /* for writes */
u16 flags;
#define EE_ADDR1 0x0001 /* 8 bit addrs */
#define EE_ADDR2 0x0002 /* 16 bit addrs */