diff options
| author | Fabien Dessenne <fabien.dessenne@st.com> | 2019-08-26 17:38:43 +0200 |
|---|---|---|
| committer | Bjorn Andersson <bjorn.andersson@linaro.org> | 2019-11-14 22:44:53 -0800 |
| commit | 410119ee29b6c14b88bae8cfa87b202e3fbe0488 (patch) | |
| tree | efbc37cf6937e273d6ce604aaaf159c88768d554 /drivers/remoteproc | |
| parent | 14ea1d04ed0f7bae60951bdb8eeaa55cdbb26c73 (diff) | |
| download | linux-410119ee29b6c14b88bae8cfa87b202e3fbe0488.tar.bz2 | |
remoteproc: stm32: wakeup the system by wdg irq
If the device node defines the 'wakeup-source' property, use the WDG
exti IRQ as a wakeup source of the system.
Signed-off-by: Fabien Dessenne <fabien.dessenne@st.com>
Link: https://lore.kernel.org/r/1566833923-16718-3-git-send-email-fabien.dessenne@st.com
[bjorn: Replace ifdef with __maybe_unused for suspend/resume functions]
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Diffstat (limited to 'drivers/remoteproc')
| -rw-r--r-- | drivers/remoteproc/stm32_rproc.c | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/drivers/remoteproc/stm32_rproc.c b/drivers/remoteproc/stm32_rproc.c index f791770b8850..4adc9cefb532 100644 --- a/drivers/remoteproc/stm32_rproc.c +++ b/drivers/remoteproc/stm32_rproc.c @@ -15,6 +15,7 @@ #include <linux/of_address.h> #include <linux/of_device.h> #include <linux/of_reserved_mem.h> +#include <linux/pm_wakeirq.h> #include <linux/regmap.h> #include <linux/remoteproc.h> #include <linux/reset.h> @@ -69,6 +70,7 @@ struct stm32_rproc { struct reset_control *rst; struct stm32_syscon hold_boot; struct stm32_syscon pdds; + int wdg_irq; u32 nb_rmems; struct stm32_rproc_mem *rmems; struct stm32_mbox mb[MBOX_NB_MBX]; @@ -546,6 +548,13 @@ static int stm32_rproc_parse_dt(struct platform_device *pdev) return err; } + ddata->wdg_irq = irq; + + if (of_property_read_bool(np, "wakeup-source")) { + device_init_wakeup(dev, true); + dev_pm_set_wake_irq(dev, irq); + } + dev_info(dev, "wdg irq registered\n"); } @@ -633,6 +642,10 @@ free_mb: free_wkq: destroy_workqueue(ddata->workqueue); free_rproc: + if (device_may_wakeup(dev)) { + dev_pm_clear_wake_irq(dev); + device_init_wakeup(dev, false); + } rproc_free(rproc); return ret; } @@ -641,6 +654,7 @@ static int stm32_rproc_remove(struct platform_device *pdev) { struct rproc *rproc = platform_get_drvdata(pdev); struct stm32_rproc *ddata = rproc->priv; + struct device *dev = &pdev->dev; if (atomic_read(&rproc->power) > 0) rproc_shutdown(rproc); @@ -648,16 +662,47 @@ static int stm32_rproc_remove(struct platform_device *pdev) rproc_del(rproc); stm32_rproc_free_mbox(rproc); destroy_workqueue(ddata->workqueue); + + if (device_may_wakeup(dev)) { + dev_pm_clear_wake_irq(dev); + device_init_wakeup(dev, false); + } rproc_free(rproc); return 0; } +static int __maybe_unused stm32_rproc_suspend(struct device *dev) +{ + struct rproc *rproc = dev_get_drvdata(dev); + struct stm32_rproc *ddata = rproc->priv; + + if (device_may_wakeup(dev)) + return enable_irq_wake(ddata->wdg_irq); + + return 0; +} + +static int __maybe_unused stm32_rproc_resume(struct device *dev) +{ + struct rproc *rproc = dev_get_drvdata(dev); + struct stm32_rproc *ddata = rproc->priv; + + if (device_may_wakeup(dev)) + return disable_irq_wake(ddata->wdg_irq); + + return 0; +} + +static SIMPLE_DEV_PM_OPS(stm32_rproc_pm_ops, + stm32_rproc_suspend, stm32_rproc_resume); + static struct platform_driver stm32_rproc_driver = { .probe = stm32_rproc_probe, .remove = stm32_rproc_remove, .driver = { .name = "stm32-rproc", + .pm = &stm32_rproc_pm_ops, .of_match_table = of_match_ptr(stm32_rproc_match), }, }; |