android_kernel_xiaomi_sm8350/drivers/sh/superhyway/superhyway-sysfs.c
Paul Mundt 055a251214 [PATCH] superhyway: multiple block support and VCR rework
This extends the API somewhat to allow for platform-specific VCR reading and
writing.  Some platforms (like SH4-202) implement the VCR in a split VCRL and
VCRH, but end up being in reverse order or have other quirks that need to be
dealt with, so we add a set of superhyway_ops per-bus to accomodate this.

We also have to extend the per-device resources somewhat, as some devices now
conveniently split control and data blocks.  So we allow a platform to
register its set of SuperHyway devices via superhyway_add_devices() with the
control block always ordered as the first resource (as this is the one that
userspace cares about).

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-07 07:53:28 -08:00

46 lines
1.3 KiB
C

/*
* drivers/sh/superhyway/superhyway-sysfs.c
*
* SuperHyway Bus sysfs interface
*
* Copyright (C) 2004, 2005 Paul Mundt <lethal@linux-sh.org>
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*/
#include <linux/kernel.h>
#include <linux/device.h>
#include <linux/types.h>
#include <linux/superhyway.h>
#define superhyway_ro_attr(name, fmt, field) \
static ssize_t name##_show(struct device *dev, struct device_attribute *attr, char *buf) \
{ \
struct superhyway_device *s = to_superhyway_device(dev); \
return sprintf(buf, fmt, s->field); \
}
/* VCR flags */
superhyway_ro_attr(perr_flags, "0x%02x\n", vcr.perr_flags);
superhyway_ro_attr(merr_flags, "0x%02x\n", vcr.merr_flags);
superhyway_ro_attr(mod_vers, "0x%04x\n", vcr.mod_vers);
superhyway_ro_attr(mod_id, "0x%04x\n", vcr.mod_id);
superhyway_ro_attr(bot_mb, "0x%02x\n", vcr.bot_mb);
superhyway_ro_attr(top_mb, "0x%02x\n", vcr.top_mb);
/* Misc */
superhyway_ro_attr(resource, "0x%08lx\n", resource[0].start);
struct device_attribute superhyway_dev_attrs[] = {
__ATTR_RO(perr_flags),
__ATTR_RO(merr_flags),
__ATTR_RO(mod_vers),
__ATTR_RO(mod_id),
__ATTR_RO(bot_mb),
__ATTR_RO(top_mb),
__ATTR_RO(resource),
__ATTR_NULL,
};