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drivers:nvpps:Avoid freeing & re-request of PPS IRQ

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Avoid freeing & re-requesting of PPS IRQ when
switching between nvpps operating modes

Bug 4007008
Bug 4079057

Change-Id: I193416b8cb37ed0d4fc5241e64d8109805bf330f
Signed-off-by: Sheetal Tigadoli <stigadoli@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/2914267
(cherry picked from commit ab9551812254c359dd6e5fd094b23fcfa921f67b)
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/3003992
Reviewed-by: Sumeet Gupta <sumeetg@nvidia.com>
GVS: Gerrit_Virtual_Submit <buildbot_gerritrpt@nvidia.com>
This commit is contained in:
Sheetal Tigadoli
2023-06-01 16:33:00 +00:00
committed by mobile promotions
parent 1267ce01fe
commit 3a40a01b9e
1 changed files with 18 additions and 8 deletions
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26
drivers/nvpps/nvpps_main.c
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@@ -382,8 +382,14 @@ static irqreturn_t nvpps_gpio_isr(int irq, void *data)
{
struct nvpps_device_data *pdev_data = (struct nvpps_device_data *)data;
/* get timestamps for this event */
nvpps_get_ts(pdev_data, true);
/* Incase, if an interrupt is generated
* then check current mode in use. Ignore the
* interrupt if current mode is TIMER mode
*/
if (!pdev_data->timer_inited) {
/* get timestamps for this event */
nvpps_get_ts(pdev_data, true);
}
return IRQ_HANDLED;
}
@@ -479,6 +485,8 @@ static int set_mode(struct nvpps_device_data *pdev_data, u32 mode)
pdev_data->irq_registered = true;
dev_info(pdev_data->dev, "Registered IRQ %d for nvpps\n", pdev_data->irq);
}
} else {
dev_dbg(pdev_data->dev, "IRQ %d for nvpps is already registered\n", pdev_data->irq);
}
} else {
dev_err(pdev_data->dev, "unable to switch mode. Only timer mode is supported\n");
@@ -487,12 +495,14 @@ static int set_mode(struct nvpps_device_data *pdev_data, u32 mode)
break;
case NVPPS_MODE_TIMER:
if (pdev_data->irq_registered) {
/* unregister IRQ handler */
devm_free_irq(pdev_data->dev, pdev_data->irq, pdev_data);
pdev_data->irq_registered = false;
dev_info(pdev_data->dev, "removed IRQ %d for nvpps\n", pdev_data->irq);
}
/* If GPIO mode is run and IRQ is registered previously,
* then don't free the already requested IRQ. This is to
* avoid free'ing and re-registering of the IRQ when
* switching b/w the operating modes.
*/
/* If TIMER mode is requested and not initialized
* already then initialize it
*/
if (!pdev_data->timer_inited) {
#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 15, 0)
setup_timer(&pdev_data->timer,