soc/tegra: pmc: Fix early initialisation of PMC
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>
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@ -1550,27 +1550,29 @@ static int __init tegra_pmc_early_init(void)
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return -ENXIO;
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}
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/* Create a bit-map of the available and valid partitions */
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for (i = 0; i < pmc->soc->num_powergates; i++)
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if (pmc->soc->powergates[i])
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set_bit(i, pmc->powergates_available);
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mutex_init(&pmc->powergates_lock);
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/*
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* Invert the interrupt polarity if a PMC device tree node exists and
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* contains the nvidia,invert-interrupt property.
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*/
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invert = of_property_read_bool(np, "nvidia,invert-interrupt");
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if (np) {
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/* Create a bit-map of the available and valid partitions */
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for (i = 0; i < pmc->soc->num_powergates; i++)
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if (pmc->soc->powergates[i])
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set_bit(i, pmc->powergates_available);
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value = tegra_pmc_readl(PMC_CNTRL);
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/*
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* Invert the interrupt polarity if a PMC device tree node
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* exists and contains the nvidia,invert-interrupt property.
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*/
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invert = of_property_read_bool(np, "nvidia,invert-interrupt");
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if (invert)
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value |= PMC_CNTRL_INTR_POLARITY;
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else
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value &= ~PMC_CNTRL_INTR_POLARITY;
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value = tegra_pmc_readl(PMC_CNTRL);
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tegra_pmc_writel(value, PMC_CNTRL);
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if (invert)
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value |= PMC_CNTRL_INTR_POLARITY;
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else
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value &= ~PMC_CNTRL_INTR_POLARITY;
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tegra_pmc_writel(value, PMC_CNTRL);
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}
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return 0;
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}
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