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-rw-r--r--arch/arm/mach-tegra/Makefile1
-rw-r--r--arch/arm/mach-tegra/common.c3
-rw-r--r--arch/arm/mach-tegra/pmc.c76
-rw-r--r--arch/arm/mach-tegra/pmc.h23
4 files changed, 103 insertions, 0 deletions
diff --git a/arch/arm/mach-tegra/Makefile b/arch/arm/mach-tegra/Makefile
index 23d15fba3843..e0b7a4d32599 100644
--- a/arch/arm/mach-tegra/Makefile
+++ b/arch/arm/mach-tegra/Makefile
@@ -7,6 +7,7 @@ obj-y += clock.o
7obj-y += timer.o 7obj-y += timer.o
8obj-y += pinmux.o 8obj-y += pinmux.o
9obj-y += fuse.o 9obj-y += fuse.o
10obj-y += pmc.o
10obj-$(CONFIG_ARCH_TEGRA_2x_SOC) += powergate.o 11obj-$(CONFIG_ARCH_TEGRA_2x_SOC) += powergate.o
11obj-$(CONFIG_ARCH_TEGRA_2x_SOC) += tegra2_clocks.o 12obj-$(CONFIG_ARCH_TEGRA_2x_SOC) += tegra2_clocks.o
12obj-$(CONFIG_ARCH_TEGRA_2x_SOC) += tegra2_emc.o 13obj-$(CONFIG_ARCH_TEGRA_2x_SOC) += tegra2_emc.o
diff --git a/arch/arm/mach-tegra/common.c b/arch/arm/mach-tegra/common.c
index 76210e5df561..43da4284d862 100644
--- a/arch/arm/mach-tegra/common.c
+++ b/arch/arm/mach-tegra/common.c
@@ -32,6 +32,7 @@
32#include "board.h" 32#include "board.h"
33#include "clock.h" 33#include "clock.h"
34#include "fuse.h" 34#include "fuse.h"
35#include "pmc.h"
35 36
36/* 37/*
37 * Storage for debug-macro.S's state. 38 * Storage for debug-macro.S's state.
@@ -117,11 +118,13 @@ void __init tegra20_init_early(void)
117 tegra2_init_clocks(); 118 tegra2_init_clocks();
118 tegra_clk_init_from_table(tegra20_clk_init_table); 119 tegra_clk_init_from_table(tegra20_clk_init_table);
119 tegra_init_cache(0x331, 0x441); 120 tegra_init_cache(0x331, 0x441);
121 tegra_pmc_init();
120} 122}
121#endif 123#endif
122#ifdef CONFIG_ARCH_TEGRA_3x_SOC 124#ifdef CONFIG_ARCH_TEGRA_3x_SOC
123void __init tegra30_init_early(void) 125void __init tegra30_init_early(void)
124{ 126{
125 tegra_init_cache(0x441, 0x551); 127 tegra_init_cache(0x441, 0x551);
128 tegra_pmc_init();
126} 129}
127#endif 130#endif
diff --git a/arch/arm/mach-tegra/pmc.c b/arch/arm/mach-tegra/pmc.c
new file mode 100644
index 000000000000..7af6a54404be
--- /dev/null
+++ b/arch/arm/mach-tegra/pmc.c
@@ -0,0 +1,76 @@
1/*
2 * Copyright (C) 2012 NVIDIA CORPORATION. All rights reserved.
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms and conditions of the GNU General Public License,
6 * version 2, as published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
11 * more details.
12 *
13 * You should have received a copy of the GNU General Public License
14 * along with this program. If not, see <http://www.gnu.org/licenses/>.
15 *
16 */
17
18#include <linux/kernel.h>
19#include <linux/io.h>
20#include <linux/of.h>
21
22#include <mach/iomap.h>
23
24#define PMC_CTRL 0x0
25#define PMC_CTRL_INTR_LOW (1 << 17)
26
27static inline u32 tegra_pmc_readl(u32 reg)
28{
29 return readl(IO_ADDRESS(TEGRA_PMC_BASE + reg));
30}
31
32static inline void tegra_pmc_writel(u32 val, u32 reg)
33{
34 writel(val, IO_ADDRESS(TEGRA_PMC_BASE + reg));
35}
36
37#ifdef CONFIG_OF
38static const struct of_device_id matches[] __initconst = {
39 { .compatible = "nvidia,tegra20-pmc" },
40 { }
41};
42#endif
43
44void __init tegra_pmc_init(void)
45{
46 /*
47 * For now, Harmony is the only board that uses the PMC, and it wants
48 * the signal inverted. Seaboard would too if it used the PMC.
49 * Hopefully by the time other boards want to use the PMC, everything
50 * will be device-tree, or they also want it inverted.
51 */
52 bool invert_interrupt = true;
53 u32 val;
54
55#ifdef CONFIG_OF
56 if (of_have_populated_dt()) {
57 struct device_node *np;
58
59 invert_interrupt = false;
60
61 np = of_find_matching_node(NULL, matches);
62 if (np) {
63 if (of_find_property(np, "nvidia,invert-interrupt",
64 NULL))
65 invert_interrupt = true;
66 }
67 }
68#endif
69
70 val = tegra_pmc_readl(PMC_CTRL);
71 if (invert_interrupt)
72 val |= PMC_CTRL_INTR_LOW;
73 else
74 val &= ~PMC_CTRL_INTR_LOW;
75 tegra_pmc_writel(val, PMC_CTRL);
76}
diff --git a/arch/arm/mach-tegra/pmc.h b/arch/arm/mach-tegra/pmc.h
new file mode 100644
index 000000000000..8995ee4a8768
--- /dev/null
+++ b/arch/arm/mach-tegra/pmc.h
@@ -0,0 +1,23 @@
1/*
2 * Copyright (C) 2012 NVIDIA CORPORATION. All rights reserved.
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms and conditions of the GNU General Public License,
6 * version 2, as published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
11 * more details.
12 *
13 * You should have received a copy of the GNU General Public License
14 * along with this program. If not, see <http://www.gnu.org/licenses/>.
15 *
16 */
17
18#ifndef __MACH_TEGRA_PMC_H
19#define __MACH_TEGRA_PMC_H
20
21void tegra_pmc_init(void);
22
23#endif