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soc/tegra: pmc: Process wake events during resume

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During system resume, translate tier2 SC7 wake sources back into IRQs
and do generic_handle_irq() to invoke the interrupt handlers for edge
triggered wake events such as SW-wake.

Signed-off-by: Prathamesh Shete <pshete@nvidia.com>
Signed-off-by: Petlozu Pravareshwar <petlozup@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
This commit is contained in:
Petlozu Pravareshwar 2022-10-02 14:44:09 +00:00 committed by Thierry Reding
parent 1ddb8f6d44
commit 0474cc8489
1 changed files with 41 additions and 0 deletions
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41
drivers/soc/tegra/pmc.c
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@ -23,6 +23,7 @@
#include <linux/err.h>
#include <linux/export.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/iopoll.h>
#include <linux/irqdomain.h>
@ -3147,6 +3148,45 @@ static void wke_clear_wake_status(struct tegra_pmc *pmc)
}
}
/* translate sc7 wake sources back into IRQs to catch edge triggered wakeups */
static void tegra186_pmc_process_wake_events(struct tegra_pmc *pmc, unsigned int index,
unsigned long status)
{
unsigned int wake;
dev_dbg(pmc->dev, "Wake[%d:%d] status=%#lx\n", (index * 32) + 31, index * 32, status);
for_each_set_bit(wake, &status, 32) {
irq_hw_number_t hwirq = wake + 32 * index;
struct irq_desc *desc;
unsigned int irq;
irq = irq_find_mapping(pmc->domain, hwirq);
desc = irq_to_desc(irq);
if (!desc || !desc->action || !desc->action->name) {
dev_dbg(pmc->dev, "Resume caused by WAKE%ld, IRQ %d\n", hwirq, irq);
continue;
}
dev_dbg(pmc->dev, "Resume caused by WAKE%ld, %s\n", hwirq, desc->action->name);
generic_handle_irq(irq);
}
}
static void tegra186_pmc_wake_syscore_resume(void)
{
u32 status, mask;
unsigned int i;
for (i = 0; i < pmc->soc->max_wake_vectors; i++) {
mask = readl(pmc->wake + WAKE_AOWAKE_TIER2_ROUTING(i));
status = readl(pmc->wake + WAKE_AOWAKE_STATUS_R(i)) & mask;
tegra186_pmc_process_wake_events(pmc, i, status);
}
}
static int tegra186_pmc_wake_syscore_suspend(void)
{
wke_read_sw_wake_status(pmc);
@ -3812,6 +3852,7 @@ static const struct tegra_pmc_regs tegra186_pmc_regs = {
static void tegra186_pmc_init(struct tegra_pmc *pmc)
{
pmc->syscore.suspend = tegra186_pmc_wake_syscore_suspend;
pmc->syscore.resume = tegra186_pmc_wake_syscore_resume;
register_syscore_ops(&pmc->syscore);
}