soc: tegra: Changes for v5.3-rc1

This contains a set of minor fixes and cleanups for core Tegra drivers.
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Merge tag 'tegra-for-5.3-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux into arm/drivers

soc: tegra: Changes for v5.3-rc1

This contains a set of minor fixes and cleanups for core Tegra drivers.

* tag 'tegra-for-5.3-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux:
  soc/tegra: Select pinctrl for Tegra194
  soc/tegra: fuse: Do not log error message on deferred probe
  soc/tegra: pmc: Add comments clarifying wake events
  soc/tegra: pmc: Avoid crash for non-wake IRQs
  soc/tegra: pmc: Fail to allocate more than one wake IRQ

Signed-off-by: Olof Johansson <olof@lixom.net>

drivers/soc/tegra/Kconfig

@@ -109,6 +109,7 @@ config ARCH_TEGRA_186_SOC
 config ARCH_TEGRA_194_SOC
 	bool "NVIDIA Tegra194 SoC"
 	select MAILBOX
+	select PINCTRL_TEGRA194
 	select TEGRA_BPMP
 	select TEGRA_HSP_MBOX
 	select TEGRA_IVC

drivers/soc/tegra/fuse/fuse-tegra.c

@@ -133,8 +133,10 @@ static int tegra_fuse_probe(struct platform_device *pdev)
 
 	fuse->clk = devm_clk_get(&pdev->dev, "fuse");
 	if (IS_ERR(fuse->clk)) {
-		dev_err(&pdev->dev, "failed to get FUSE clock: %ld",
+		if (PTR_ERR(fuse->clk) != -EPROBE_DEFER)
-			PTR_ERR(fuse->clk));
+			dev_err(&pdev->dev, "failed to get FUSE clock: %ld",
+				PTR_ERR(fuse->clk));
+
 		fuse->base = base;
 		return PTR_ERR(fuse->clk);
 	}

drivers/soc/tegra/pmc.c

@@ -232,6 +232,11 @@ struct tegra_pmc_soc {
 	const char * const *reset_levels;
 	unsigned int num_reset_levels;
 
+	/*
+	 * These describe events that can wake the system from sleep (i.e.
+	 * LP0 or SC7). Wakeup from other sleep states (such as LP1 or LP2)
+	 * are dealt with in the LIC.
+	 */
 	const struct tegra_wake_event *wake_events;
 	unsigned int num_wake_events;
 };
@@ -1854,6 +1859,9 @@ static int tegra_pmc_irq_alloc(struct irq_domain *domain, unsigned int virq,
 	unsigned int i;
 	int err = 0;
 
+	if (WARN_ON(num_irqs > 1))
+		return -EINVAL;
+
 	for (i = 0; i < soc->num_wake_events; i++) {
 		const struct tegra_wake_event *event = &soc->wake_events[i];
 
@@ -1894,6 +1902,11 @@ static int tegra_pmc_irq_alloc(struct irq_domain *domain, unsigned int virq,
 		}
 	}
 
+	/*
+	 * For interrupts that don't have associated wake events, assign a
+	 * dummy hardware IRQ number. This is used in the ->irq_set_type()
+	 * and ->irq_set_wake() callbacks to return early for these IRQs.
+	 */
 	if (i == soc->num_wake_events)
 		err = irq_domain_set_hwirq_and_chip(domain, virq, ULONG_MAX,
 						    &pmc->irq, pmc);
@@ -1912,6 +1925,10 @@ static int tegra_pmc_irq_set_wake(struct irq_data *data, unsigned int on)
 	unsigned int offset, bit;
 	u32 value;
 
+	/* nothing to do if there's no associated wake event */
+	if (WARN_ON(data->hwirq == ULONG_MAX))
+		return 0;
+
 	offset = data->hwirq / 32;
 	bit = data->hwirq % 32;
 
@@ -1939,6 +1956,7 @@ static int tegra_pmc_irq_set_type(struct irq_data *data, unsigned int type)
 	struct tegra_pmc *pmc = irq_data_get_irq_chip_data(data);
 	u32 value;
 
+	/* nothing to do if there's no associated wake event */
 	if (data->hwirq == ULONG_MAX)
 		return 0;