f9c9550b8d
This is the Microchip version of the Atmel 24c1024, which is already supported. The key difference between them is that the I2C address bit used to select between the two banks is bit 2 for the 1025 and not bit 0 as in the 1024. Add a flag to describe this difference. Signed-off-by: Trent Piepho <tpiepho@kymetacorp.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
37 lines
1.2 KiB
C
37 lines
1.2 KiB
C
/*
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* at24.h - platform_data for the at24 (generic eeprom) driver
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* (C) Copyright 2008 by Pengutronix
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* (C) Copyright 2012 by Wolfram Sang
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* same license as the driver
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*/
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#ifndef _LINUX_AT24_H
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#define _LINUX_AT24_H
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#include <linux/types.h>
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/**
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* struct at24_platform_data - data to set up at24 (generic eeprom) driver
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* @byte_len: size of eeprom in byte
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* @page_size: number of byte which can be written in one go
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* @flags: tunable options, check AT24_FLAG_* defines
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*
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* If you set up a custom eeprom type, please double-check the parameters.
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* Especially page_size needs extra care, as you risk data loss if your value
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* is bigger than what the chip actually supports!
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*
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*/
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struct at24_platform_data {
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u32 byte_len; /* size (sum of all addr) */
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u16 page_size; /* for writes */
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u8 flags;
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#define AT24_FLAG_ADDR16 0x80 /* address pointer is 16 bit */
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#define AT24_FLAG_READONLY 0x40 /* sysfs-entry will be read-only */
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#define AT24_FLAG_IRUGO 0x20 /* sysfs-entry will be world-readable */
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#define AT24_FLAG_TAKE8ADDR 0x10 /* take always 8 addresses (24c00) */
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#define AT24_FLAG_BANK_BIT_2 0x08 /* blank select at bit 2 (vs lsb) */
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};
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#endif /* _LINUX_AT24_H */
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