Hi Nishanth,
Do you mind rebasing that one so I can apply it?
On 21/08/2014 at 11:12:01 -0500, Nishanth Menon wrote :
> With the recent pinctrl-single changes, SoCs such as Texas
> Instrument's OMAP processors can treat wake-up events from deeper idle
> states as interrupts.
>
> Let's add support for the optional second interrupt for wake-up
> events. And then SoC can wakeup and handle the event using it's
> regular handler.
>
> Finally, to pass the wake-up interrupt in the dts file,
> interrupts-extended property needs to be passed.
>
> This is similar in approach to commit 2a0b965cfb6e ("serial: omap: Add
> support for optional wake-up")
>
> Signed-off-by: Nishanth Menon <n...@ti.com>
> ---
> drivers/rtc/rtc-ds1307.c | 57
> ++++++++++++++++++++++++++++++++++++++++++++++
> 1 file changed, 57 insertions(+)
>
> diff --git a/drivers/rtc/rtc-ds1307.c b/drivers/rtc/rtc-ds1307.c
> index f03d5ba..5feedfc 100644
> --- a/drivers/rtc/rtc-ds1307.c
> +++ b/drivers/rtc/rtc-ds1307.c
> @@ -15,6 +15,8 @@
> #include <linux/init.h>
> #include <linux/slab.h>
> #include <linux/i2c.h>
> +#include <linux/of_device.h>
> +#include <linux/of_irq.h>
> #include <linux/string.h>
> #include <linux/rtc.h>
> #include <linux/bcd.h>
> @@ -115,6 +117,7 @@ struct ds1307 {
> struct i2c_client *client;
> struct rtc_device *rtc;
> struct work_struct work;
> + int wakeirq;
> s32 (*read_block_data)(const struct i2c_client *client, u8 command,
> u8 length, u8 *values);
> s32 (*write_block_data)(const struct i2c_client *client, u8 command,
> @@ -835,6 +838,34 @@ ds1307_nvram_write(struct file *filp, struct kobject
> *kobj,
>
> /*----------------------------------------------------------------------*/
>
> +static int ds1307_i2c_suspend(struct i2c_client *client, pm_message_t mesg)
> +{
> + struct ds1307 *ds1307 = i2c_get_clientdata(client);
> + struct device *dev = &client->dev;
> +
> + if (!ds1307->wakeirq)
> + return 0;
> +
> + if (device_may_wakeup(dev))
> + enable_irq(ds1307->wakeirq);
> +
> + return 0;
> +}
> +
> +static int ds1307_i2c_resume(struct i2c_client *client)
> +{
> + struct ds1307 *ds1307 = i2c_get_clientdata(client);
> + struct device *dev = &client->dev;
> +
> + if (!ds1307->wakeirq)
> + return 0;
> +
> + if (device_may_wakeup(dev))
> + disable_irq_nosync(ds1307->wakeirq);
> +
> + return 0;
> +}
> +
> static int ds1307_probe(struct i2c_client *client,
> const struct i2c_device_id *id)
> {
> @@ -1116,6 +1147,8 @@ read_rtc:
> }
>
> if (want_irq) {
> + struct device_node *node = client->dev.of_node;
> +
> err = request_irq(client->irq, ds1307_irq, IRQF_SHARED,
> ds1307->rtc->name, client);
> if (err) {
> @@ -1125,6 +1158,28 @@ read_rtc:
>
> set_bit(HAS_ALARM, &ds1307->flags);
> dev_dbg(&client->dev, "got IRQ %d\n", client->irq);
> + if (node)
> + ds1307->wakeirq = irq_of_parse_and_map(node, 1);
> +
> + if (ds1307->wakeirq <= 0)
> + ds1307->wakeirq = 0;
> + else
> + err = devm_request_irq(&client->dev,
> + ds1307->wakeirq,
> + ds1307_irq,
> + IRQF_ONESHOT,
> + ds1307->rtc->name,
> + client);
> + if (err) {
> + dev_err(&client->dev, "unable to get wakeIRQ
> %d\n",
> + err);
> + free_irq(client->irq, client);
> + goto exit;
> + }
> +
> + /* We enable the interrupt only during suspend path */
> + if (ds1307->wakeirq)
> + disable_irq_nosync(ds1307->wakeirq);
> }
> }
>
> @@ -1189,6 +1244,8 @@ static struct i2c_driver ds1307_driver = {
> },
> .probe = ds1307_probe,
> .remove = ds1307_remove,
> + .suspend = ds1307_i2c_suspend,
> + .resume = ds1307_i2c_resume,
> .id_table = ds1307_id,
> };
>
--
Alexandre Belloni, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com
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