diff options
author | Mauro Carvalho Chehab <mchehab@redhat.com> | 2012-08-14 17:31:16 -0300 |
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committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2012-08-15 16:43:09 -0300 |
commit | 2c3fb08b3f74b8792004095a1f6881a3296ff643 (patch) | |
tree | 19be9d09c4aa66d4363ee9d38a43721f5d6b144f /drivers/media/platform/s5p-mfc/s5p_mfc_pm.c | |
parent | 2a2d1cf46500ab7599d0b45ee837f3936763ccac (diff) | |
download | linux-2c3fb08b3f74b8792004095a1f6881a3296ff643.tar.bz2 |
[media] rename drivers/media/video as .../platform
The remaining drivers are mostly platform drivers. Name the
dir to reflect it.
It makes sense to latter break it into a few other dirs.
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/platform/s5p-mfc/s5p_mfc_pm.c')
-rw-r--r-- | drivers/media/platform/s5p-mfc/s5p_mfc_pm.c | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/drivers/media/platform/s5p-mfc/s5p_mfc_pm.c b/drivers/media/platform/s5p-mfc/s5p_mfc_pm.c new file mode 100644 index 000000000000..0503d14ac94e --- /dev/null +++ b/drivers/media/platform/s5p-mfc/s5p_mfc_pm.c @@ -0,0 +1,137 @@ +/* + * 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 <linux/clk.h> +#include <linux/err.h> +#include <linux/platform_device.h> +#ifdef CONFIG_PM_RUNTIME +#include <linux/pm_runtime.h> +#endif +#include "s5p_mfc_common.h" +#include "s5p_mfc_debug.h" +#include "s5p_mfc_pm.h" + +#define MFC_CLKNAME "sclk_mfc" +#define MFC_GATE_CLK_NAME "mfc" + +#define CLK_DEBUG + +static struct s5p_mfc_pm *pm; +static struct s5p_mfc_dev *p_dev; + +#ifdef CLK_DEBUG +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 preapre clock-gating control\n"); + goto err_p_ip_clk; + } + + pm->clock = clk_get(&dev->plat_dev->dev, MFC_CLKNAME); + if (IS_ERR(pm->clock)) { + mfc_err("Failed to get MFC clock\n"); + ret = PTR_ERR(pm->clock); + goto err_g_ip_clk_2; + } + + ret = clk_prepare(pm->clock); + if (ret) { + mfc_err("Failed to prepare MFC clock\n"); + goto err_p_ip_clk_2; + } + + atomic_set(&pm->power, 0); +#ifdef CONFIG_PM_RUNTIME + pm->device = &dev->plat_dev->dev; + pm_runtime_enable(pm->device); +#endif +#ifdef CLK_DEBUG + atomic_set(&clk_ref, 0); +#endif + return 0; +err_p_ip_clk_2: + clk_put(pm->clock); +err_g_ip_clk_2: + clk_unprepare(pm->clock_gate); +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) +{ + clk_unprepare(pm->clock_gate); + clk_put(pm->clock_gate); + clk_unprepare(pm->clock); + clk_put(pm->clock); +#ifdef CONFIG_PM_RUNTIME + 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", 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", atomic_read(&clk_ref)); +#endif + clk_disable(pm->clock_gate); +} + +int s5p_mfc_power_on(void) +{ +#ifdef CONFIG_PM_RUNTIME + 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_RUNTIME + return pm_runtime_put_sync(pm->device); +#else + atomic_set(&pm->power, 0); + return 0; +#endif +} + + |