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greybus: battery: use feature tag rather than kernel version

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Conditionally define a new symbol DRIVER_OWNS_PSY_STRUCT, which is
set in "kernel_ver.h" based on on the kernel version.  Use it to
distinguish code used for kernels that differ in whether a power
supply structure is owned by the driver, or by the power supply
core.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
This commit is contained in:
Alex Elder 2015-05-07 13:00:21 -05:00 committed by Greg Kroah-Hartman
parent 9ade6d3122
commit 5c58640d8d
2 changed files with 9 additions and 5 deletions
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7
drivers/staging/greybus/battery.c
View file

@ -7,7 +7,6 @@
* Released under the GPLv2 only.
*/
#include <linux/version.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
@ -20,7 +19,7 @@ struct gb_battery {
* and new apis in the same driver for now, until this is merged
* upstream, when all of these version checks can be removed.
*/
#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 1, 0)
#ifdef DRIVER_OWNS_PSY_STRUCT
struct power_supply bat;
#define to_gb_battery(x) container_of(x, struct gb_battery, bat)
#else
@ -295,7 +294,7 @@ static enum power_supply_property battery_props[] = {
POWER_SUPPLY_PROP_VOLTAGE_NOW,
};
#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 1, 0)
#ifdef DRIVER_OWNS_PSY_STRUCT
static int init_and_register(struct gb_connection *connection,
struct gb_battery *gb)
{
@ -362,7 +361,7 @@ static void gb_battery_connection_exit(struct gb_connection *connection)
{
struct gb_battery *gb = connection->private;
#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 1, 0)
#ifdef DRIVER_OWNS_PSY_STRUCT
power_supply_unregister(&gb->bat);
#else
power_supply_unregister(gb->bat);

7
drivers/staging/greybus/kernel_ver.h
View file

@ -15,6 +15,12 @@
#define __GREYBUS_KERNEL_VER_H
#include <linux/kernel.h>
#include <linux/version.h>
#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 1, 0)
/* Commit: 297d716 power_supply: Change ownership from driver to core */
#define DRIVER_OWNS_PSY_STRUCT
#endif
#ifndef __ATTR_WO
#define __ATTR_WO(_name) { \
@ -57,7 +63,6 @@
* 3.17, which they explicitly changed in the 3.17 kernel. Consistency is
* overrated.
*/
#include <linux/version.h>
#include <linux/gpio.h>
#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 17, 0)