From 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 Mon Sep 17 00:00:00 2001 From: Yunhong Jiang Date: Tue, 4 Aug 2015 12:17:53 -0700 Subject: Add the rt linux 4.1.3-rt3 as base Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang --- kernel/drivers/media/platform/s5p-mfc/s5p_mfc_pm.c | 139 +++++++++++++++++++++ 1 file changed, 139 insertions(+) create mode 100644 kernel/drivers/media/platform/s5p-mfc/s5p_mfc_pm.c (limited to 'kernel/drivers/media/platform/s5p-mfc/s5p_mfc_pm.c') diff --git a/kernel/drivers/media/platform/s5p-mfc/s5p_mfc_pm.c b/kernel/drivers/media/platform/s5p-mfc/s5p_mfc_pm.c new file mode 100644 index 000000000..5f97a3398 --- /dev/null +++ b/kernel/drivers/media/platform/s5p-mfc/s5p_mfc_pm.c @@ -0,0 +1,139 @@ +/* + * linux/drivers/media/platform/s5p-mfc/s5p_mfc_pm.c + * + * Copyright (c) 2010 Samsung Electronics Co., Ltd. + * http://www.samsung.com/ + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + */ + +#include +#include +#include +#include +#include "s5p_mfc_common.h" +#include "s5p_mfc_debug.h" +#include "s5p_mfc_pm.h" + +#define MFC_GATE_CLK_NAME "mfc" +#define MFC_SCLK_NAME "sclk_mfc" +#define MFC_SCLK_RATE (200 * 1000000) + +#define CLK_DEBUG + +static struct s5p_mfc_pm *pm; +static struct s5p_mfc_dev *p_dev; + +#ifdef CLK_DEBUG +static atomic_t clk_ref; +#endif + +int s5p_mfc_init_pm(struct s5p_mfc_dev *dev) +{ + int ret = 0; + + pm = &dev->pm; + p_dev = dev; + pm->clock_gate = clk_get(&dev->plat_dev->dev, MFC_GATE_CLK_NAME); + if (IS_ERR(pm->clock_gate)) { + mfc_err("Failed to get clock-gating control\n"); + ret = PTR_ERR(pm->clock_gate); + goto err_g_ip_clk; + } + + ret = clk_prepare(pm->clock_gate); + if (ret) { + mfc_err("Failed to prepare clock-gating control\n"); + goto err_p_ip_clk; + } + + if (dev->variant->version != MFC_VERSION_V6) { + pm->clock = clk_get(&dev->plat_dev->dev, MFC_SCLK_NAME); + if (IS_ERR(pm->clock)) { + mfc_info("Failed to get MFC special clock control\n"); + } else { + clk_set_rate(pm->clock, MFC_SCLK_RATE); + ret = clk_prepare_enable(pm->clock); + if (ret) { + mfc_err("Failed to enable MFC special clock\n"); + goto err_s_clk; + } + } + } + + atomic_set(&pm->power, 0); +#ifdef CONFIG_PM + pm->device = &dev->plat_dev->dev; + pm_runtime_enable(pm->device); +#endif +#ifdef CLK_DEBUG + atomic_set(&clk_ref, 0); +#endif + return 0; + +err_s_clk: + clk_put(pm->clock); +err_p_ip_clk: + clk_put(pm->clock_gate); +err_g_ip_clk: + return ret; +} + +void s5p_mfc_final_pm(struct s5p_mfc_dev *dev) +{ + if (dev->variant->version != MFC_VERSION_V6 && + pm->clock) { + clk_disable_unprepare(pm->clock); + clk_put(pm->clock); + } + clk_unprepare(pm->clock_gate); + clk_put(pm->clock_gate); +#ifdef CONFIG_PM + pm_runtime_disable(pm->device); +#endif +} + +int s5p_mfc_clock_on(void) +{ + int ret; +#ifdef CLK_DEBUG + atomic_inc(&clk_ref); + mfc_debug(3, "+ %d\n", atomic_read(&clk_ref)); +#endif + ret = clk_enable(pm->clock_gate); + return ret; +} + +void s5p_mfc_clock_off(void) +{ +#ifdef CLK_DEBUG + atomic_dec(&clk_ref); + mfc_debug(3, "- %d\n", atomic_read(&clk_ref)); +#endif + clk_disable(pm->clock_gate); +} + +int s5p_mfc_power_on(void) +{ +#ifdef CONFIG_PM + return pm_runtime_get_sync(pm->device); +#else + atomic_set(&pm->power, 1); + return 0; +#endif +} + +int s5p_mfc_power_off(void) +{ +#ifdef CONFIG_PM + return pm_runtime_put_sync(pm->device); +#else + atomic_set(&pm->power, 0); + return 0; +#endif +} + + -- cgit 1.2.3-korg