[PATCH] arm/tegra: Harmony: Configure PMC for low-level interrupts
From: Stephen Warren <hidden>
Date: 2011-09-21 22:10:52
Also in:
linux-tegra, lkml
Subsystem:
arm port, the rest · Maintainers:
Russell King, Linus Torvalds
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 [off-list ref] 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 <redacted> --- 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