diff options
author | Yunhong Jiang <yunhong.jiang@intel.com> | 2015-08-04 12:17:53 -0700 |
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committer | Yunhong Jiang <yunhong.jiang@intel.com> | 2015-08-04 15:44:42 -0700 |
commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/include/linux/platform_data/at24.h | |
parent | 98260f3884f4a202f9ca5eabed40b1354c489b29 (diff) |
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base.
It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:
commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Sat Jul 25 12:13:34 2015 +0200
Prepare v4.1.3-rt3
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.
Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/include/linux/platform_data/at24.h')
-rw-r--r-- | kernel/include/linux/platform_data/at24.h | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/kernel/include/linux/platform_data/at24.h b/kernel/include/linux/platform_data/at24.h new file mode 100644 index 000000000..c42aa89d3 --- /dev/null +++ b/kernel/include/linux/platform_data/at24.h @@ -0,0 +1,55 @@ +/* + * at24.h - platform_data for the at24 (generic eeprom) driver + * (C) Copyright 2008 by Pengutronix + * (C) Copyright 2012 by Wolfram Sang + * same license as the driver + */ + +#ifndef _LINUX_AT24_H +#define _LINUX_AT24_H + +#include <linux/types.h> +#include <linux/memory.h> + +/** + * struct at24_platform_data - data to set up at24 (generic eeprom) driver + * @byte_len: size of eeprom in byte + * @page_size: number of byte which can be written in one go + * @flags: tunable options, check AT24_FLAG_* defines + * @setup: an optional callback invoked after eeprom is probed; enables kernel + code to access eeprom via memory_accessor, see example + * @context: optional parameter passed to setup() + * + * If you set up a custom eeprom type, please double-check the parameters. + * Especially page_size needs extra care, as you risk data loss if your value + * is bigger than what the chip actually supports! + * + * An example in pseudo code for a setup() callback: + * + * void get_mac_addr(struct memory_accessor *mem_acc, void *context) + * { + * u8 *mac_addr = ethernet_pdata->mac_addr; + * off_t offset = context; + * + * // Read MAC addr from EEPROM + * if (mem_acc->read(mem_acc, mac_addr, offset, ETH_ALEN) == ETH_ALEN) + * pr_info("Read MAC addr from EEPROM: %pM\n", mac_addr); + * } + * + * This function pointer and context can now be set up in at24_platform_data. + */ + +struct at24_platform_data { + u32 byte_len; /* size (sum of all addr) */ + u16 page_size; /* for writes */ + u8 flags; +#define AT24_FLAG_ADDR16 0x80 /* address pointer is 16 bit */ +#define AT24_FLAG_READONLY 0x40 /* sysfs-entry will be read-only */ +#define AT24_FLAG_IRUGO 0x20 /* sysfs-entry will be world-readable */ +#define AT24_FLAG_TAKE8ADDR 0x10 /* take always 8 addresses (24c00) */ + + void (*setup)(struct memory_accessor *, void *context); + void *context; +}; + +#endif /* _LINUX_AT24_H */ |