ARM: tegra: Add a simple PMC driver (d3b8bdd5) · Commits · 戴 / test

arch/arm/mach-tegra/Makefile

+1 −0

Original line number	Diff line number	Diff line
		@@ -7,6 +7,7 @@ obj-y += clock.o
		obj-y += timer.o
		obj-y += pinmux.o
		obj-y += fuse.o
		obj-y += pmc.o
		obj-$(CONFIG_ARCH_TEGRA_2x_SOC) += powergate.o
		obj-$(CONFIG_ARCH_TEGRA_2x_SOC) += tegra2_clocks.o
		obj-$(CONFIG_ARCH_TEGRA_2x_SOC) += tegra2_emc.o

arch/arm/mach-tegra/common.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -32,6 +32,7 @@
		#include "board.h"
		#include "clock.h"
		#include "fuse.h"
		#include "pmc.h"

		/*
		* Storage for debug-macro.S's state.
		@@ -117,11 +118,13 @@ void __init tegra20_init_early(void)
		tegra2_init_clocks();
		tegra_clk_init_from_table(tegra20_clk_init_table);
		tegra_init_cache(0x331, 0x441);
		tegra_pmc_init();
		}
		#endif
		#ifdef CONFIG_ARCH_TEGRA_3x_SOC
		void __init tegra30_init_early(void)
		{
		tegra_init_cache(0x441, 0x551);
		tegra_pmc_init();
		}
		#endif

arch/arm/mach-tegra/pmc.c

0 → 100644

+76 −0

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		/*
		* Copyright (C) 2012 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 <mach/iomap.h>

		#define PMC_CTRL 0x0
		#define PMC_CTRL_INTR_LOW (1 << 17)

		static inline u32 tegra_pmc_readl(u32 reg)
		{
		return readl(IO_ADDRESS(TEGRA_PMC_BASE + reg));
		}

		static inline void tegra_pmc_writel(u32 val, u32 reg)
		{
		writel(val, IO_ADDRESS(TEGRA_PMC_BASE + reg));
		}

		#ifdef CONFIG_OF
		static const struct of_device_id matches[] __initconst = {
		{ .compatible = "nvidia,tegra20-pmc" },
		{ }
		};
		#endif

		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

		val = tegra_pmc_readl(PMC_CTRL);
		if (invert_interrupt)
		val \|= PMC_CTRL_INTR_LOW;
		else
		val &= ~PMC_CTRL_INTR_LOW;
		tegra_pmc_writel(val, PMC_CTRL);
		}

arch/arm/mach-tegra/pmc.h

0 → 100644

+23 −0

Original line number	Diff line number	Diff line
		/*
		* Copyright (C) 2012 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/>.
		*
		*/

		#ifndef __MACH_TEGRA_PMC_H
		#define __MACH_TEGRA_PMC_H

		void tegra_pmc_init(void);

		#endif

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