| Message ID | 20230705204314.89800-13-paul@crapouillou.net |
|---|---|
| State | Superseded |
| Headers | show |
| Series | i2c: Use new PM macros | expand |
On Wed, 5 Jul 2023 22:43:03 +0200 Paul Cercueil <paul@crapouillou.net> wrote: > Use the new PM macros for the suspend and resume functions to be > automatically dropped by the compiler when CONFIG_PM or > CONFIG_PM_SLEEP are disabled, without having to use #ifdef guards. > > This has the advantage of always compiling these functions in, > independently of any Kconfig option. Thanks to that, bugs and other > regressions are subsequently easier to catch. > > Note that the behaviour is slightly different than before; the original > code wrapped the suspend/resume with #ifdef CONFIG_PM guards, which > resulted in these functions being compiled in but never used when > CONFIG_PM_SLEEP was disabled. > > Now, those functions are only compiled in when CONFIG_PM_SLEEP is > enabled. > > Also note that pm_sleep_ptr() has not been applied to each callback > in the dev_pm_ops structure because the pm_sleep_ptr() at the usage site > is sufficient. > > Signed-off-by: Paul Cercueil <paul@crapouillou.net> Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
diff --git a/drivers/i2c/busses/i2c-lpc2k.c b/drivers/i2c/busses/i2c-lpc2k.c index 5c6d96554753..c61157f1409b 100644 --- a/drivers/i2c/busses/i2c-lpc2k.c +++ b/drivers/i2c/busses/i2c-lpc2k.c @@ -431,7 +431,6 @@ static void i2c_lpc2k_remove(struct platform_device *dev) i2c_del_adapter(&i2c->adap); } -#ifdef CONFIG_PM static int i2c_lpc2k_suspend(struct device *dev) { struct lpc2k_i2c *i2c = dev_get_drvdata(dev); @@ -456,11 +455,6 @@ static const struct dev_pm_ops i2c_lpc2k_dev_pm_ops = { .resume_noirq = i2c_lpc2k_resume, }; -#define I2C_LPC2K_DEV_PM_OPS (&i2c_lpc2k_dev_pm_ops) -#else -#define I2C_LPC2K_DEV_PM_OPS NULL -#endif - static const struct of_device_id lpc2k_i2c_match[] = { { .compatible = "nxp,lpc1788-i2c" }, {}, @@ -472,7 +466,7 @@ static struct platform_driver i2c_lpc2k_driver = { .remove_new = i2c_lpc2k_remove, .driver = { .name = "lpc2k-i2c", - .pm = I2C_LPC2K_DEV_PM_OPS, + .pm = pm_sleep_ptr(&i2c_lpc2k_dev_pm_ops), .of_match_table = lpc2k_i2c_match, }, };
Use the new PM macros for the suspend and resume functions to be automatically dropped by the compiler when CONFIG_PM or CONFIG_PM_SLEEP are disabled, without having to use #ifdef guards. This has the advantage of always compiling these functions in, independently of any Kconfig option. Thanks to that, bugs and other regressions are subsequently easier to catch. Note that the behaviour is slightly different than before; the original code wrapped the suspend/resume with #ifdef CONFIG_PM guards, which resulted in these functions being compiled in but never used when CONFIG_PM_SLEEP was disabled. Now, those functions are only compiled in when CONFIG_PM_SLEEP is enabled. Also note that pm_sleep_ptr() has not been applied to each callback in the dev_pm_ops structure because the pm_sleep_ptr() at the usage site is sufficient. Signed-off-by: Paul Cercueil <paul@crapouillou.net> --- Cc: Vladimir Zapolskiy <vz@mleia.com> Cc: linux-arm-kernel@lists.infradead.org --- drivers/i2c/busses/i2c-lpc2k.c | 8 +------- 1 file changed, 1 insertion(+), 7 deletions(-)