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soc: pinctrl-lpi: add SSR changes based on snd event fwk

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Add changes to support SSR in pinctrl lpi driver
based on snd event framework.

Change-Id: If4fb3085ab69ae04628ef10a8b528d0cdc20f40d
Signed-off-by: Laxminath Kasam <lkasam@codeaurora.org>
This commit is contained in:
Laxminath Kasam 2018-09-22 01:39:56 +05:30
commit 27b1bbc54b
1 changed files with 26 additions and 0 deletions
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26
soc/pinctrl-lpi.c
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@ -21,6 +21,7 @@
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/types.h>
#include <soc/snd_event.h>
#include <dsp/audio_notifier.h>
#include "core.h"
@ -59,6 +60,7 @@
#define LPI_GPIO_FUNC_FUNC5 "func5"
static bool lpi_dev_up;
static struct device *lpi_dev;
/* The index of each function in lpi_gpio_functions[] array */
enum lpi_gpio_func_index {
@ -384,12 +386,14 @@ static int lpi_notifier_service_cb(struct notifier_block *this,
initial_boot = false;
break;
}
snd_event_notify(lpi_dev, SND_EVENT_DOWN);
lpi_dev_up = false;
break;
case AUDIO_NOTIFIER_SERVICE_UP:
if (initial_boot)
initial_boot = false;
lpi_dev_up = true;
snd_event_notify(lpi_dev, SND_EVENT_UP);
break;
default:
break;
@ -402,6 +406,15 @@ static struct notifier_block service_nb = {
.priority = -INT_MAX,
};
static void lpi_pinctrl_ssr_disable(struct device *dev, void *data)
{
lpi_dev_up = false;
}
static const struct snd_event_ops lpi_pinctrl_ssr_ops = {
.disable = lpi_pinctrl_ssr_disable,
};
#ifdef CONFIG_DEBUG_FS
#include <linux/seq_file.h>
@ -576,6 +589,7 @@ static int lpi_pinctrl_probe(struct platform_device *pdev)
goto err_range;
}
lpi_dev = &pdev->dev;
lpi_dev_up = true;
ret = audio_notifier_register("lpi_tlmm", AUDIO_NOTIFIER_ADSP_DOMAIN,
&service_nb);
@ -585,8 +599,19 @@ static int lpi_pinctrl_probe(struct platform_device *pdev)
goto err_range;
}
ret = snd_event_client_register(dev, &lpi_pinctrl_ssr_ops, NULL);
if (!ret) {
snd_event_notify(dev, SND_EVENT_UP);
} else {
dev_err(dev, "%s: snd_event registration failed, ret [%d]\n",
__func__, ret);
goto err_snd_evt;
}
return 0;
err_snd_evt:
audio_notifier_deregister("lpi_tlmm");
err_range:
gpiochip_remove(&state->chip);
err_chip:
@ -597,6 +622,7 @@ static int lpi_pinctrl_remove(struct platform_device *pdev)
{
struct lpi_gpio_state *state = platform_get_drvdata(pdev);
snd_event_client_deregister(&pdev->dev);
audio_notifier_deregister("lpi_tlmm");
gpiochip_remove(&state->chip);
return 0;