From c5dac7c9984d8a034eb7ae149cedf23ec9259f98 Mon Sep 17 00:00:00 2001 From: Kuninori Morimoto Date: Wed, 31 Aug 2011 20:08:48 +0000 Subject: [PATCH] net/irda: sh_irda: add PM support Signed-off-by: Kuninori Morimoto Signed-off-by: David S. Miller --- drivers/net/irda/sh_irda.c | 38 +++++++++++++++++++++++++++----------- 1 file changed, 27 insertions(+), 11 deletions(-) diff --git a/drivers/net/irda/sh_irda.c b/drivers/net/irda/sh_irda.c index b86f408bbb7e..d275e276e742 100644 --- a/drivers/net/irda/sh_irda.c +++ b/drivers/net/irda/sh_irda.c @@ -26,6 +26,7 @@ #include #include #include +#include #include #include #include @@ -145,7 +146,7 @@ struct sh_irda_xir_func { struct sh_irda_self { void __iomem *membase; unsigned int irq; - struct clk *clk; + struct platform_device *pdev; struct net_device *ndev; @@ -694,7 +695,7 @@ static int sh_irda_open(struct net_device *ndev) struct sh_irda_self *self = netdev_priv(ndev); int err; - clk_enable(self->clk); + pm_runtime_get_sync(&self->pdev->dev); err = sh_irda_crc_init(self); if (err) goto open_err; @@ -718,7 +719,7 @@ static int sh_irda_open(struct net_device *ndev) return 0; open_err: - clk_disable(self->clk); + pm_runtime_put_sync(&self->pdev->dev); return err; } @@ -734,6 +735,7 @@ static int sh_irda_stop(struct net_device *ndev) } netif_stop_queue(ndev); + pm_runtime_put_sync(&self->pdev->dev); dev_info(&ndev->dev, "stoped\n"); @@ -786,11 +788,8 @@ static int __devinit sh_irda_probe(struct platform_device *pdev) if (err) goto err_mem_2; - self->clk = clk_get(&pdev->dev, NULL); - if (IS_ERR(self->clk)) { - dev_err(&pdev->dev, "cannot get irda clock\n"); - goto err_mem_3; - } + self->pdev = pdev; + pm_runtime_enable(&pdev->dev); irda_init_max_qos_capabilies(&self->qos); @@ -820,8 +819,7 @@ static int __devinit sh_irda_probe(struct platform_device *pdev) goto exit; err_mem_4: - clk_put(self->clk); -err_mem_3: + pm_runtime_disable(&pdev->dev); sh_irda_remove_iobuf(self); err_mem_2: iounmap(self->membase); @@ -840,7 +838,7 @@ static int __devexit sh_irda_remove(struct platform_device *pdev) return 0; unregister_netdev(ndev); - clk_put(self->clk); + pm_runtime_disable(&pdev->dev); sh_irda_remove_iobuf(self); iounmap(self->membase); free_netdev(ndev); @@ -849,11 +847,29 @@ static int __devexit sh_irda_remove(struct platform_device *pdev) return 0; } +static int sh_irda_runtime_nop(struct device *dev) +{ + /* Runtime PM callback shared between ->runtime_suspend() + * and ->runtime_resume(). Simply returns success. + * + * This driver re-initializes all registers after + * pm_runtime_get_sync() anyway so there is no need + * to save and restore registers here. + */ + return 0; +} + +static const struct dev_pm_ops sh_irda_pm_ops = { + .runtime_suspend = sh_irda_runtime_nop, + .runtime_resume = sh_irda_runtime_nop, +}; + static struct platform_driver sh_irda_driver = { .probe = sh_irda_probe, .remove = __devexit_p(sh_irda_remove), .driver = { .name = DRIVER_NAME, + .pm = &sh_irda_pm_ops, }, }; -- 2.20.1