From dead83894c7bb5b12005cc37c129247ee53fbdda Mon Sep 17 00:00:00 2001 From: Aaron Wu Date: Tue, 10 Feb 2015 17:40:35 +0800 Subject: [PATCH] bfin_can: introduce ioremap to comply to archs with MMU Blackfin was built without MMU, old driver code access the IO space by physical address, introduce the ioremap approach to be compitable with the common style supporting MMU enabled arch. Signed-off-by: Aaron Wu Signed-off-by: Marc Kleine-Budde --- drivers/net/can/bfin_can.c | 22 ++++++++-------------- 1 file changed, 8 insertions(+), 14 deletions(-) diff --git a/drivers/net/can/bfin_can.c b/drivers/net/can/bfin_can.c index 9cbf615e5673..8039703481a7 100644 --- a/drivers/net/can/bfin_can.c +++ b/drivers/net/can/bfin_can.c @@ -552,16 +552,10 @@ static int bfin_can_probe(struct platform_device *pdev) goto exit; } - if (!request_mem_region(res_mem->start, resource_size(res_mem), - dev_name(&pdev->dev))) { - err = -EBUSY; - goto exit; - } - /* request peripheral pins */ err = peripheral_request_list(pdata, dev_name(&pdev->dev)); if (err) - goto exit_mem_release; + goto exit; dev = alloc_bfin_candev(); if (!dev) { @@ -570,7 +564,13 @@ static int bfin_can_probe(struct platform_device *pdev) } priv = netdev_priv(dev); - priv->membase = (void __iomem *)res_mem->start; + + priv->membase = devm_ioremap_resource(&pdev->dev, res_mem); + if (IS_ERR(priv->membase)) { + err = PTR_ERR(priv->membase); + goto exit_peri_pin_free; + } + priv->rx_irq = rx_irq->start; priv->tx_irq = tx_irq->start; priv->err_irq = err_irq->start; @@ -602,8 +602,6 @@ exit_candev_free: free_candev(dev); exit_peri_pin_free: peripheral_free_list(pdata); -exit_mem_release: - release_mem_region(res_mem->start, resource_size(res_mem)); exit: return err; } @@ -612,15 +610,11 @@ static int bfin_can_remove(struct platform_device *pdev) { struct net_device *dev = platform_get_drvdata(pdev); struct bfin_can_priv *priv = netdev_priv(dev); - struct resource *res; bfin_can_set_reset_mode(dev); unregister_candev(dev); - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - release_mem_region(res->start, resource_size(res)); - peripheral_free_list(priv->pin_list); free_candev(dev); -- 2.20.1