diff options
Diffstat (limited to 'drivers/spi')
| -rw-r--r-- | drivers/spi/spi-pl022.c | 66 |
1 files changed, 44 insertions, 22 deletions
diff --git a/drivers/spi/spi-pl022.c b/drivers/spi/spi-pl022.c index 15737bcee9fb..919464102d33 100644 --- a/drivers/spi/spi-pl022.c +++ b/drivers/spi/spi-pl022.c @@ -2300,6 +2300,45 @@ pl022_remove(struct amba_device *adev) return 0; } +#if defined(CONFIG_SUSPEND) || defined(CONFIG_PM_RUNTIME) +/* + * These two functions are used from both suspend/resume and + * the runtime counterparts to handle external resources like + * clocks, pins and regulators when going to sleep. + */ +static void pl022_suspend_resources(struct pl022 *pl022) +{ + int ret; + + clk_disable(pl022->clk); + + /* Optionally let pins go into sleep states */ + if (!IS_ERR(pl022->pins_sleep)) { + ret = pinctrl_select_state(pl022->pinctrl, + pl022->pins_sleep); + if (ret) + dev_err(&pl022->adev->dev, + "could not set pins to sleep state\n"); + } +} + +static void pl022_resume_resources(struct pl022 *pl022) +{ + int ret; + + /* Optionaly enable pins to be muxed in and configured */ + if (!IS_ERR(pl022->pins_default)) { + ret = pinctrl_select_state(pl022->pinctrl, + pl022->pins_default); + if (ret) + dev_err(&pl022->adev->dev, + "could not set default pins\n"); + } + + clk_enable(pl022->clk); +} +#endif + #ifdef CONFIG_SUSPEND static int pl022_suspend(struct device *dev) { @@ -2311,6 +2350,7 @@ static int pl022_suspend(struct device *dev) dev_warn(dev, "cannot suspend master\n"); return ret; } + pl022_suspend_resources(pl022); dev_dbg(dev, "suspended\n"); return 0; @@ -2321,6 +2361,8 @@ static int pl022_resume(struct device *dev) struct pl022 *pl022 = dev_get_drvdata(dev); int ret; + pl022_resume_resources(pl022); + /* Start the queue running */ ret = spi_master_resume(pl022->master); if (ret) @@ -2336,36 +2378,16 @@ static int pl022_resume(struct device *dev) static int pl022_runtime_suspend(struct device *dev) { struct pl022 *pl022 = dev_get_drvdata(dev); - int status = 0; - - clk_disable(pl022->clk); - - /* Optionally let pins go into sleep states */ - if (!IS_ERR(pl022->pins_sleep)) { - status = pinctrl_select_state(pl022->pinctrl, - pl022->pins_sleep); - if (status) - dev_err(dev, "could not set pins to sleep state\n"); - } + pl022_suspend_resources(pl022); return 0; } static int pl022_runtime_resume(struct device *dev) { struct pl022 *pl022 = dev_get_drvdata(dev); - int status = 0; - - /* Optionaly enable pins to be muxed in and configured */ - if (!IS_ERR(pl022->pins_default)) { - status = pinctrl_select_state(pl022->pinctrl, - pl022->pins_default); - if (status) - dev_err(dev, "could not set default pins\n"); - } - - clk_enable(pl022->clk); + pl022_resume_resources(pl022); return 0; } #endif |