soc/tegra: pmc: Fix early initialisation of PMC (11131895) · Commits · e / devices / android_kernel_teracube_2e

During early initialisation, the available power partitions for a given device is configured as well as the polarity of the PMC interrupt. Both of which should only be configured if there is a valid device node for the PMC device. This is because the soc data used for configuring the power partitions is only available if a device node for the PMC is found and the code to configure the interrupt polarity uses the device node pointer directly. Some early device-tree images may not have this device node and so fix this by ensuring the device node pointer is valid when configuring these items. Signed-off-by:

Jon Hunter <jonathanh@nvidia.com> Signed-off-by:

Thierry Reding <treding@nvidia.com>

drivers/soc/tegra/pmc.c

+18 −16

Original line number	Diff line number	Diff line
		@@ -1550,16 +1550,17 @@ static int __init tegra_pmc_early_init(void)
		return -ENXIO;
		}

		mutex_init(&pmc->powergates_lock);

		if (np) {
		/* Create a bit-map of the available and valid partitions */
		for (i = 0; i < pmc->soc->num_powergates; i++)
		if (pmc->soc->powergates[i])
		set_bit(i, pmc->powergates_available);

		mutex_init(&pmc->powergates_lock);

		/*
		* Invert the interrupt polarity if a PMC device tree node exists and
		* contains the nvidia,invert-interrupt property.
		* Invert the interrupt polarity if a PMC device tree node
		* exists and contains the nvidia,invert-interrupt property.
		*/
		invert = of_property_read_bool(np, "nvidia,invert-interrupt");

		@@ -1571,6 +1572,7 @@ static int __init tegra_pmc_early_init(void)
		value &= ~PMC_CNTRL_INTR_POLARITY;

		tegra_pmc_writel(value, PMC_CNTRL);
		}

		return 0;
		}