eb732518e0
Signed-off-by: Kamil Debski <k.debski@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Reviewed-by: Sylwester Nawrocki <s.nawrocki@samsung.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
137 lines
2.7 KiB
C
137 lines
2.7 KiB
C
/*
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* linux/drivers/media/video/s5p-mfc/s5p_mfc_pm.c
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*
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* Copyright (c) 2010 Samsung Electronics Co., Ltd.
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* http://www.samsung.com/
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#include <linux/clk.h>
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#include <linux/err.h>
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#include <linux/platform_device.h>
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#ifdef CONFIG_PM_RUNTIME
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#include <linux/pm_runtime.h>
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#endif
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#include "s5p_mfc_common.h"
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#include "s5p_mfc_debug.h"
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#include "s5p_mfc_pm.h"
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#define MFC_CLKNAME "sclk_mfc"
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#define MFC_GATE_CLK_NAME "mfc"
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#define CLK_DEBUG
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static struct s5p_mfc_pm *pm;
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static struct s5p_mfc_dev *p_dev;
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#ifdef CLK_DEBUG
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atomic_t clk_ref;
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#endif
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int s5p_mfc_init_pm(struct s5p_mfc_dev *dev)
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{
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int ret = 0;
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pm = &dev->pm;
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p_dev = dev;
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pm->clock_gate = clk_get(&dev->plat_dev->dev, MFC_GATE_CLK_NAME);
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if (IS_ERR(pm->clock_gate)) {
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mfc_err("Failed to get clock-gating control\n");
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ret = PTR_ERR(pm->clock_gate);
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goto err_g_ip_clk;
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}
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ret = clk_prepare(pm->clock_gate);
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if (ret) {
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mfc_err("Failed to preapre clock-gating control\n");
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goto err_p_ip_clk;
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}
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pm->clock = clk_get(&dev->plat_dev->dev, MFC_CLKNAME);
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if (IS_ERR(pm->clock)) {
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mfc_err("Failed to get MFC clock\n");
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ret = PTR_ERR(pm->clock);
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goto err_g_ip_clk_2;
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}
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ret = clk_prepare(pm->clock);
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if (ret) {
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mfc_err("Failed to prepare MFC clock\n");
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goto err_p_ip_clk_2;
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}
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atomic_set(&pm->power, 0);
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#ifdef CONFIG_PM_RUNTIME
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pm->device = &dev->plat_dev->dev;
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pm_runtime_enable(pm->device);
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#endif
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#ifdef CLK_DEBUG
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atomic_set(&clk_ref, 0);
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#endif
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return 0;
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err_p_ip_clk_2:
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clk_put(pm->clock);
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err_g_ip_clk_2:
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clk_unprepare(pm->clock_gate);
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err_p_ip_clk:
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clk_put(pm->clock_gate);
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err_g_ip_clk:
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return ret;
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}
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void s5p_mfc_final_pm(struct s5p_mfc_dev *dev)
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{
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clk_unprepare(pm->clock_gate);
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clk_put(pm->clock_gate);
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clk_unprepare(pm->clock);
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clk_put(pm->clock);
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#ifdef CONFIG_PM_RUNTIME
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pm_runtime_disable(pm->device);
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#endif
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}
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int s5p_mfc_clock_on(void)
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{
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int ret;
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#ifdef CLK_DEBUG
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atomic_inc(&clk_ref);
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mfc_debug(3, "+ %d", atomic_read(&clk_ref));
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#endif
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ret = clk_enable(pm->clock_gate);
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return ret;
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}
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void s5p_mfc_clock_off(void)
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{
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#ifdef CLK_DEBUG
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atomic_dec(&clk_ref);
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mfc_debug(3, "- %d", atomic_read(&clk_ref));
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#endif
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clk_disable(pm->clock_gate);
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}
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int s5p_mfc_power_on(void)
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{
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#ifdef CONFIG_PM_RUNTIME
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return pm_runtime_get_sync(pm->device);
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#else
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atomic_set(&pm->power, 1);
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return 0;
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#endif
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}
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int s5p_mfc_power_off(void)
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{
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#ifdef CONFIG_PM_RUNTIME
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return pm_runtime_put_sync(pm->device);
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#else
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atomic_set(&pm->power, 0);
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return 0;
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#endif
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}
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