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SubjectRe: [PATCH mfd-next] mfd: max14577 and sec: add PM_SLEEP dependency to suspend/resume
On Tue, 17 Dec 2013, Krzysztof Kozlowski wrote:

> Add CONFIG_PM_SLEEP dependency to suspend and resume functions of
> max14577 MFD driver and sec-core.c code.
>
> This fixes the warnings:
> drivers/mfd/max14577.c:176:12: warning: ‘max14577_suspend’ defined but not used [-Wunused-function]
> drivers/mfd/max14577.c:199:12: warning: ‘max14577_resume’ defined but not used [-Wunused-function]
> drivers/mfd/sec-core.c:347:12: warning: ‘sec_pmic_suspend’ defined but not used [-Wunused-function]
> drivers/mfd/sec-core.c:369:12: warning: ‘sec_pmic_resume’ defined but not used [-Wunused-function]
>
> Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
> ---
> drivers/mfd/max14577.c | 2 ++
> drivers/mfd/sec-core.c | 2 ++
> 2 files changed, 4 insertions(+)
>
> diff --git a/drivers/mfd/max14577.c b/drivers/mfd/max14577.c
> index a5e1c370c609..1018a6644469 100644
> --- a/drivers/mfd/max14577.c
> +++ b/drivers/mfd/max14577.c
> @@ -173,6 +173,7 @@ static const struct i2c_device_id max14577_i2c_id[] = {
> };
> MODULE_DEVICE_TABLE(i2c, max14577_i2c_id);
>
> +#ifdef CONFIG_PM_SLEEP
> static int max14577_suspend(struct device *dev)
> {
> struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
> @@ -208,6 +209,7 @@ static int max14577_resume(struct device *dev)
>
> return 0;
> }
> +#endif /* CONFIG_PM_SLEEP */

Is this the best way we have of doing this?

Isn't there a helper which casts these to NULL if unused?

> static struct of_device_id max14577_dt_match[] = {
> { .compatible = "maxim,max14577", },
> diff --git a/drivers/mfd/sec-core.c b/drivers/mfd/sec-core.c
> index 56615af42a28..455e3a8fb95d 100644
> --- a/drivers/mfd/sec-core.c
> +++ b/drivers/mfd/sec-core.c
> @@ -343,6 +343,7 @@ static int sec_pmic_remove(struct i2c_client *i2c)
> return 0;
> }
>
> +#ifdef CONFIG_PM_SLEEP
> static int sec_pmic_suspend(struct device *dev)
> {
> struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
> @@ -377,6 +378,7 @@ static int sec_pmic_resume(struct device *dev)
>
> return 0;
> }
> +#endif /* CONFIG_PM_SLEEP */
>
> static SIMPLE_DEV_PM_OPS(sec_pmic_pm_ops, sec_pmic_suspend, sec_pmic_resume);
>

--
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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