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ARM: tegra: pmc: convert PMC driver to support DT only

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The Tegra kernel only support boot from DT now. Clean up the PMC driver
to support DT only, that includes:

* remove the ifdef of CONFIG_OF
* replace the static mapping of PMC addr to map from DT

Signed-off-by: Joseph Lo <josephl@nvidia.com>
Signed-off-by: Stephen Warren <swarren@nvidia.com>
This commit is contained in:
Joseph Lo 2013-02-28 21:32:10 +00:00 committed by Stephen Warren
parent 2b84e53beb
commit 291fde31a9
1 changed files with 22 additions and 29 deletions
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51
arch/arm/mach-tegra/pmc.c
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@ -1,5 +1,5 @@
/*
* Copyright (C) 2012 NVIDIA CORPORATION. All rights reserved.
* 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,
@ -18,59 +18,52 @@
#include <linux/kernel.h>
#include <linux/io.h>
#include <linux/of.h>
#include "iomap.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(IO_ADDRESS(TEGRA_PMC_BASE + reg));
return readl(tegra_pmc_base + reg);
}
static inline void tegra_pmc_writel(u32 val, u32 reg)
{
writel(val, IO_ADDRESS(TEGRA_PMC_BASE + reg));
writel(val, tegra_pmc_base + reg);
}
#ifdef CONFIG_OF
static const struct of_device_id matches[] __initconst = {
{ .compatible = "nvidia,tegra114-pmc" },
{ .compatible = "nvidia,tegra30-pmc" },
{ .compatible = "nvidia,tegra20-pmc" },
{ }
};
#endif
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)
{
/*
* For now, Harmony is the only board that uses the PMC, and it wants
* the signal inverted. Seaboard would too if it used the PMC.
* Hopefully by the time other boards want to use the PMC, everything
* will be device-tree, or they also want it inverted.
*/
bool invert_interrupt = true;
u32 val;
#ifdef CONFIG_OF
if (of_have_populated_dt()) {
struct device_node *np;
invert_interrupt = false;
np = of_find_matching_node(NULL, matches);
if (np) {
if (of_find_property(np, "nvidia,invert-interrupt",
NULL))
invert_interrupt = true;
}
}
#endif
tegra_pmc_parse_dt();
val = tegra_pmc_readl(PMC_CTRL);
if (invert_interrupt)
if (tegra_pmc_invert_interrupt)
val |= PMC_CTRL_INTR_LOW;
else
val &= ~PMC_CTRL_INTR_LOW;