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@xxxxxxxxxx> 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: Stephen Warren <swarren@xxxxxxxxxx>
---
arch/arm/mach-tegra/board-harmony-power.c | 13 ++++++++++++-
1 files changed, 12 insertions(+), 1 deletions(-)
diff --git a/arch/arm/mach-tegra/board-harmony-power.c b/arch/arm/mach-tegra/board-harmony-power.c
index 5ad8b2f..21d1285 100644
--- a/arch/arm/mach-tegra/board-harmony-power.c
+++ b/arch/arm/mach-tegra/board-harmony-power.c
@@ -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;
--
1.7.0.4
--
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