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authorMauro Carvalho Chehab <mchehab@redhat.com>2012-08-14 17:31:16 -0300
committerMauro Carvalho Chehab <mchehab@redhat.com>2012-08-15 16:43:09 -0300
commit2c3fb08b3f74b8792004095a1f6881a3296ff643 (patch)
tree19be9d09c4aa66d4363ee9d38a43721f5d6b144f /drivers/media/platform/s5p-mfc/s5p_mfc_pm.c
parent2a2d1cf46500ab7599d0b45ee837f3936763ccac (diff)
downloadvexpress-lsk-2c3fb08b3f74b8792004095a1f6881a3296ff643.tar.gz
[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.c137
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 00000000000..0503d14ac94
--- /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
+}
+
+