diff options
Diffstat (limited to 'drivers/staging/media/sunxi/cedrus/cedrus_hw.c')
-rw-r--r-- | drivers/staging/media/sunxi/cedrus/cedrus_hw.c | 106 |
1 files changed, 69 insertions, 37 deletions
diff --git a/drivers/staging/media/sunxi/cedrus/cedrus_hw.c b/drivers/staging/media/sunxi/cedrus/cedrus_hw.c index daf5f244f93b00..1744e6fcc99980 100644 --- a/drivers/staging/media/sunxi/cedrus/cedrus_hw.c +++ b/drivers/staging/media/sunxi/cedrus/cedrus_hw.c @@ -19,6 +19,7 @@ #include <linux/dma-mapping.h> #include <linux/interrupt.h> #include <linux/clk.h> +#include <linux/pm_runtime.h> #include <linux/regmap.h> #include <linux/reset.h> #include <linux/soc/sunxi/sunxi_sram.h> @@ -140,6 +141,64 @@ static irqreturn_t cedrus_irq(int irq, void *data) return IRQ_HANDLED; } +int cedrus_hw_suspend(struct device *device) +{ + struct cedrus_dev *dev = dev_get_drvdata(device); + + reset_control_assert(dev->rstc); + + clk_disable_unprepare(dev->ram_clk); + clk_disable_unprepare(dev->mod_clk); + clk_disable_unprepare(dev->ahb_clk); + + return 0; +} + +int cedrus_hw_resume(struct device *device) +{ + struct cedrus_dev *dev = dev_get_drvdata(device); + int ret; + + ret = clk_prepare_enable(dev->ahb_clk); + if (ret) { + dev_err(dev->dev, "Failed to enable AHB clock\n"); + + return ret; + } + + ret = clk_prepare_enable(dev->mod_clk); + if (ret) { + dev_err(dev->dev, "Failed to enable MOD clock\n"); + + goto err_ahb_clk; + } + + ret = clk_prepare_enable(dev->ram_clk); + if (ret) { + dev_err(dev->dev, "Failed to enable RAM clock\n"); + + goto err_mod_clk; + } + + ret = reset_control_reset(dev->rstc); + if (ret) { + dev_err(dev->dev, "Failed to apply reset\n"); + + goto err_ram_clk; + } + + return 0; + +err_ram_clk: + clk_disable_unprepare(dev->ram_clk); +err_mod_clk: + clk_disable_unprepare(dev->mod_clk); +err_ahb_clk: + clk_disable_unprepare(dev->ahb_clk); + + return ret; +} + int cedrus_hw_probe(struct cedrus_dev *dev) { const struct cedrus_variant *variant; @@ -236,42 +295,17 @@ int cedrus_hw_probe(struct cedrus_dev *dev) goto err_sram; } - ret = clk_prepare_enable(dev->ahb_clk); - if (ret) { - dev_err(dev->dev, "Failed to enable AHB clock\n"); - - goto err_sram; - } - - ret = clk_prepare_enable(dev->mod_clk); - if (ret) { - dev_err(dev->dev, "Failed to enable MOD clock\n"); - - goto err_ahb_clk; - } - - ret = clk_prepare_enable(dev->ram_clk); - if (ret) { - dev_err(dev->dev, "Failed to enable RAM clock\n"); - - goto err_mod_clk; - } - - ret = reset_control_reset(dev->rstc); - if (ret) { - dev_err(dev->dev, "Failed to apply reset\n"); - - goto err_ram_clk; + pm_runtime_enable(dev->dev); + if (!pm_runtime_enabled(dev->dev)) { + ret = cedrus_hw_resume(dev->dev); + if (ret) + goto err_pm; } return 0; -err_ram_clk: - clk_disable_unprepare(dev->ram_clk); -err_mod_clk: - clk_disable_unprepare(dev->mod_clk); -err_ahb_clk: - clk_disable_unprepare(dev->ahb_clk); +err_pm: + pm_runtime_disable(dev->dev); err_sram: sunxi_sram_release(dev->dev); err_mem: @@ -282,11 +316,9 @@ err_mem: void cedrus_hw_remove(struct cedrus_dev *dev) { - reset_control_assert(dev->rstc); - - clk_disable_unprepare(dev->ram_clk); - clk_disable_unprepare(dev->mod_clk); - clk_disable_unprepare(dev->ahb_clk); + pm_runtime_disable(dev->dev); + if (!pm_runtime_status_suspended(dev->dev)) + cedrus_hw_suspend(dev->dev); sunxi_sram_release(dev->dev); |