redonkable/alistair23-linux
redonkable/alistair23-linux
1
0
Fork 0
Code Releases Activity

Merge branch 'spi-pl022' into spi-next

Browse source
This commit is contained in:
Mark Brown 2012-10-17 22:14:35 +09:00
parent ef5347c63f d8f18420c5
commit b4482afeb7
1 changed files with 36 additions and 16 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

52
drivers/spi/spi-pl022.c
View file

@ -371,6 +371,7 @@ struct pl022 {
/* Two optional pin states - default & sleep */
struct pinctrl *pinctrl;
struct pinctrl_state *pins_default;
struct pinctrl_state *pins_idle;
struct pinctrl_state *pins_sleep;
struct spi_master *master;
struct pl022_ssp_controller *master_info;
@ -2116,6 +2117,11 @@ pl022_probe(struct amba_device *adev, const struct amba_id *id)
} else
dev_err(dev, "could not get default pinstate\n");
pl022->pins_idle = pinctrl_lookup_state(pl022->pinctrl,
PINCTRL_STATE_IDLE);
if (IS_ERR(pl022->pins_idle))
dev_dbg(dev, "could not get idle pinstate\n");
pl022->pins_sleep = pinctrl_lookup_state(pl022->pinctrl,
PINCTRL_STATE_SLEEP);
if (IS_ERR(pl022->pins_sleep))
@ -2249,10 +2255,9 @@ pl022_probe(struct amba_device *adev, const struct amba_id *id)
pm_runtime_set_autosuspend_delay(dev,
platform_info->autosuspend_delay);
pm_runtime_use_autosuspend(dev);
pm_runtime_put_autosuspend(dev);
} else {
pm_runtime_put(dev);
}
pm_runtime_put(dev);
return 0;
err_spi_register:
@ -2307,35 +2312,47 @@ pl022_remove(struct amba_device *adev)
* the runtime counterparts to handle external resources like
* clocks, pins and regulators when going to sleep.
*/
static void pl022_suspend_resources(struct pl022 *pl022)
static void pl022_suspend_resources(struct pl022 *pl022, bool runtime)
{
int ret;
struct pinctrl_state *pins_state;
clk_disable(pl022->clk);
pins_state = runtime ? pl022->pins_idle : pl022->pins_sleep;
/* Optionally let pins go into sleep states */
if (!IS_ERR(pl022->pins_sleep)) {
ret = pinctrl_select_state(pl022->pinctrl,
pl022->pins_sleep);
if (!IS_ERR(pins_state)) {
ret = pinctrl_select_state(pl022->pinctrl, pins_state);
if (ret)
dev_err(&pl022->adev->dev,
"could not set pins to sleep state\n");
dev_err(&pl022->adev->dev, "could not set %s pins\n",
runtime ? "idle" : "sleep");
}
}
static void pl022_resume_resources(struct pl022 *pl022)
static void pl022_resume_resources(struct pl022 *pl022, bool runtime)
{
int ret;
/* Optionaly enable pins to be muxed in and configured */
/* First go to the default state */
if (!IS_ERR(pl022->pins_default)) {
ret = pinctrl_select_state(pl022->pinctrl,
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");
}
if (!runtime) {
/* Then let's idle the pins until the next transfer happens */
if (!IS_ERR(pl022->pins_idle)) {
ret = pinctrl_select_state(pl022->pinctrl,
pl022->pins_idle);
if (ret)
dev_err(&pl022->adev->dev,
"could not set idle pins\n");
}
}
clk_enable(pl022->clk);
}
#endif
@ -2351,7 +2368,9 @@ static int pl022_suspend(struct device *dev)
dev_warn(dev, "cannot suspend master\n");
return ret;
}
pl022_suspend_resources(pl022);
pm_runtime_get_sync(dev);
pl022_suspend_resources(pl022, false);
dev_dbg(dev, "suspended\n");
return 0;
@ -2362,7 +2381,8 @@ static int pl022_resume(struct device *dev)
struct pl022 *pl022 = dev_get_drvdata(dev);
int ret;
pl022_resume_resources(pl022);
pl022_resume_resources(pl022, false);
pm_runtime_put(dev);
/* Start the queue running */
ret = spi_master_resume(pl022->master);
@ -2380,7 +2400,7 @@ static int pl022_runtime_suspend(struct device *dev)
{
struct pl022 *pl022 = dev_get_drvdata(dev);
pl022_suspend_resources(pl022);
pl022_suspend_resources(pl022, true);
return 0;
}
@ -2388,7 +2408,7 @@ static int pl022_runtime_resume(struct device *dev)
{
struct pl022 *pl022 = dev_get_drvdata(dev);
pl022_resume_resources(pl022);
pl022_resume_resources(pl022, true);
return 0;
}
#endif