Commit d3cd0071 authored by Christian Eggers's avatar Christian Eggers Committed by Greg Kroah-Hartman
Browse files

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: default avatarChristian Eggers <ceggers@arri.de>
Link: https://lore.kernel.org/r/20200727111218.26926-1-ceggers@arri.de


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent d162219c

drivers/misc/eeprom/at25.c

+1 −1
Original line number Diff line number Diff line
@@ -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;

include/linux/spi/eeprom.h

+1 −1
Original line number Diff line number Diff line
@@ -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 */