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Commit 9eb4b91e authored by Stephen Warren's avatar Stephen Warren Committed by Olof Johansson
Browse files

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



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@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?

Signed-off-by: default avatarStephen Warren <swarren@nvidia.com>
Signed-off-by: default avatarOlof Johansson <olof@lixom.net>
parent add29e61

arch/arm/mach-tegra/board-harmony-power.c

+12 −1
Original line number Diff line number Diff line
@@ -18,10 +18,11 @@ 
#include <linux/i2c.h>

#include <linux/platform_device.h>

#include <linux/gpio.h>



#include <linux/io.h>

#include <linux/regulator/machine.h>

#include <linux/mfd/tps6586x.h>



#include <mach/iomap.h>

#include <mach/irqs.h>



#include "board-harmony.h"
@@ -113,6 +114,16 @@ static struct i2c_board_info __initdata harmony_regulators[] = { 


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;