[PATCH] arm/tegra: Harmony: Configure PMC for low-level interrupts

[Stephen Warren]

Stephen Warren wrote at Wednesday, September 21, 2011 4:11 PM:
> Without this, the PMC continually detects an interrupt when the PMU_IRQ
> line is high, causing the tps6686x IRQ handler thread to hog an entire
> CPU.
> 
> This change was originally written by Wei Ni <wni at nvidia.com> for Seaboard
> in the ChromeOS kernel.
> 
> Long-term, this should probably be moved into some kind of PMU driver,
> or perhaps integrated into the GPIO/IRQ/pinmux system?

Olof, is this change OK for inclusion? Or, should we create some kind
of PMU driver and interrupt controller to solve this?

Thanks.

>  int __init harmony_regulator_init(void)
>  {
> +	void __iomem *pmc = IO_ADDRESS(TEGRA_PMC_BASE);
> +	u32 pmc_ctrl;
> +
> +	/*
> +	 * Configure the power management controller to trigger PMU
> +	 * interrupts when low
> +	 */
> +	pmc_ctrl = readl(pmc + PMC_CTRL);
> +	writel(pmc_ctrl | PMC_CTRL_INTR_LOW, pmc + PMC_CTRL);
> +
>  	i2c_register_board_info(3, harmony_regulators, 1);
> 
>  	return 0;

-- 
nvpublic