/*
* Copyright (C) 2012,2013 NVIDIA CORPORATION. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include <linux/kernel.h>
#include <linux/io.h>
#include <linux/of.h>
#include <linux/of_address.h>
#define PMC_CTRL 0x0
#define PMC_CTRL_INTR_LOW (1 << 17)
static void __iomem *tegra_pmc_base;
static bool tegra_pmc_invert_interrupt;
static inline u32 tegra_pmc_readl(u32 reg)
{
return readl(tegra_pmc_base + reg);
}
static inline void tegra_pmc_writel(u32 val, u32 reg)
{
writel(val, tegra_pmc_base + reg);
}
static const struct of_device_id matches[] __initconst = {
{ .compatible = "nvidia,tegra114-pmc" },
{ .compatible = "nvidia,tegra30-pmc" },
{ .compatible = "nvidia,tegra20-pmc" },
{ }
};
static void tegra_pmc_parse_dt(void)
{
struct device_node *np;
np = of_find_matching_node(NULL, matches);
BUG_ON(!np);
tegra_pmc_base = of_iomap(np, 0);
tegra_pmc_invert_interrupt = of_property_read_bool(np,
"nvidia,invert-interrupt");
}
void __init tegra_pmc_init(void)
{
u32 val;
tegra_pmc_parse_dt();
val = tegra_pmc_readl(PMC_CTRL);
if (tegra_pmc_invert_interrupt)
val |= PMC_CTRL_INTR_LOW;
else
val &= ~PMC_CTRL_INTR_LOW;
tegra_pmc_writel(val, PMC_CTRL);
}
