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linux/arch/arm/mach-tegra/tegra2_emc.h

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ARM: tegra: Add external memory controller driver The frequency memory bus on Tegra can be adjusted without disabling accesses to memory by updating the memory configuration registers from a per-board table, and then changing the clock frequency. The clock controller and memory controller have an interlock that prevents the new memory registers from taking effect until the clock frequency change. Acked-by: Olof Johansson <olof@lixom.net> Signed-off-by: Colin Cross <ccross@android.com>
2011-02-13 02:22:49 +00:00
/*
* Copyright (C) 2011 Google, Inc.
*
* Author:
* Colin Cross <ccross@android.com>
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* This program is distributed in the hope that 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.
*
*/
ARM: tegra: emc: convert tegra2_emc to a platform driver This is the first step in making it device-tree aware and get rid of the in-kernel EMC tables (of which there are none in mainline, thankfully). Changes since v3: * moved to devm_request_and_ioremap() in probe() Changes since v2: * D'oh -- missed a couple of variables that were added, never used and then later removed in a later patch. Changes since v1: * Fixed messed up indentation * Removed code that should be gone (was added here and removed later in series) Signed-off-by: Olof Johansson <olof@lixom.net> Acked-by: Stephen Warren <swarren@nvidia.com>
2011-10-16 23:54:51 +00:00
#ifndef __MACH_TEGRA_TEGRA2_EMC_H_
#define __MACH_TEGRA_TEGRA2_EMC_H
ARM: tegra: Add external memory controller driver The frequency memory bus on Tegra can be adjusted without disabling accesses to memory by updating the memory configuration registers from a per-board table, and then changing the clock frequency. The clock controller and memory controller have an interlock that prevents the new memory registers from taking effect until the clock frequency change. Acked-by: Olof Johansson <olof@lixom.net> Signed-off-by: Colin Cross <ccross@android.com>
2011-02-13 02:22:49 +00:00
int tegra_emc_set_rate(unsigned long rate);
long tegra_emc_round_rate(unsigned long rate);
ARM: tegra: emc: convert tegra2_emc to a platform driver This is the first step in making it device-tree aware and get rid of the in-kernel EMC tables (of which there are none in mainline, thankfully). Changes since v3: * moved to devm_request_and_ioremap() in probe() Changes since v2: * D'oh -- missed a couple of variables that were added, never used and then later removed in a later patch. Changes since v1: * Fixed messed up indentation * Removed code that should be gone (was added here and removed later in series) Signed-off-by: Olof Johansson <olof@lixom.net> Acked-by: Stephen Warren <swarren@nvidia.com>
2011-10-16 23:54:51 +00:00
#endif
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