diff options
| author | Stephen Warren <swarren@nvidia.com> | 2011-09-21 16:10:40 -0600 |
|---|---|---|
| committer | Olof Johansson <olof@lixom.net> | 2011-10-13 15:04:55 -0700 |
| commit | 9eb4b91e69242a0fd249b8c320c307c17917cbf8 (patch) | |
| tree | 28c3af2176c9be6e5537b025522d89255991cd12 /arch | |
| parent | add29e61d4651fc2f87dab443f47faa70ee96f8f (diff) | |
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: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
Diffstat (limited to 'arch')
| -rw-r--r-- | 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 5ad8b2f94f8d..21d1285731b3 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; |