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regulator: core: add const qualifier to ops in struct regulator_desc

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struct regulator_ops *ops is a member in struct regulator_desc, which gets
its value from individual regulator driver upon regulator_register() and
is used by regulator core APIs. It's not allowed for regulator core to
modify any of these callbacks in *ops. Add 'const' qualifier to enforce that.

Signed-off-by: Guodong Xu <guodong.xu@linaro.org>
Signed-off-by: Mark Brown <broonie@linaro.org>
This commit is contained in:
Guodong Xu 2014-08-13 19:33:38 +08:00 committed by Mark Brown
parent 7d1311b93e
commit 272e2315fa
2 changed files with 13 additions and 13 deletions
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24
drivers/regulator/core.c
View File

@ -839,7 +839,7 @@ static void print_constraints(struct regulator_dev *rdev)
static int machine_constraints_voltage(struct regulator_dev *rdev,
struct regulation_constraints *constraints)
{
struct regulator_ops *ops = rdev->desc->ops;
const struct regulator_ops *ops = rdev->desc->ops;
int ret;
/* do we need to apply the constraint voltage */
@ -938,7 +938,7 @@ static int machine_constraints_voltage(struct regulator_dev *rdev,
static int machine_constraints_current(struct regulator_dev *rdev,
struct regulation_constraints *constraints)
{
struct regulator_ops *ops = rdev->desc->ops;
const struct regulator_ops *ops = rdev->desc->ops;
int ret;
if (!constraints->min_uA && !constraints->max_uA)
@ -982,7 +982,7 @@ static int set_machine_constraints(struct regulator_dev *rdev,
const struct regulation_constraints *constraints)
{
int ret = 0;
struct regulator_ops *ops = rdev->desc->ops;
const struct regulator_ops *ops = rdev->desc->ops;
if (constraints)
rdev->constraints = kmemdup(constraints, sizeof(*constraints),
@ -2208,9 +2208,9 @@ EXPORT_SYMBOL_GPL(regulator_count_voltages);
*/
int regulator_list_voltage(struct regulator *regulator, unsigned selector)
{
struct regulator_dev *rdev = regulator->rdev;
struct regulator_ops *ops = rdev->desc->ops;
int ret;
struct regulator_dev *rdev = regulator->rdev;
const struct regulator_ops *ops = rdev->desc->ops;
int ret;
if (rdev->desc->fixed_uV && rdev->desc->n_voltages == 1 && !selector)
return rdev->desc->fixed_uV;
@ -2572,8 +2572,8 @@ EXPORT_SYMBOL_GPL(regulator_set_voltage);
int regulator_set_voltage_time(struct regulator *regulator,
int old_uV, int new_uV)
{
struct regulator_dev *rdev = regulator->rdev;
struct regulator_ops *ops = rdev->desc->ops;
struct regulator_dev *rdev = regulator->rdev;
const struct regulator_ops *ops = rdev->desc->ops;
int old_sel = -1;
int new_sel = -1;
int voltage;
@ -3336,9 +3336,9 @@ EXPORT_SYMBOL_GPL(regulator_mode_to_status);
*/
static int add_regulator_attributes(struct regulator_dev *rdev)
{
struct device *dev = &rdev->dev;
struct regulator_ops *ops = rdev->desc->ops;
int status = 0;
struct device *dev = &rdev->dev;
const struct regulator_ops *ops = rdev->desc->ops;
int status = 0;
/* some attributes need specific methods to be displayed */
if ((ops->get_voltage && ops->get_voltage(rdev) >= 0) ||
@ -3905,7 +3905,7 @@ core_initcall(regulator_init);
static int __init regulator_init_complete(void)
{
struct regulator_dev *rdev;
struct regulator_ops *ops;
const struct regulator_ops *ops;
struct regulation_constraints *c;
int enabled, ret;

2
include/linux/regulator/driver.h
View File

@ -245,7 +245,7 @@ struct regulator_desc {
int id;
bool continuous_voltage_range;
unsigned n_voltages;
struct regulator_ops *ops;
const struct regulator_ops *ops;
int irq;
enum regulator_type type;
struct module *owner;