Re: [PATCH RFC 2/5] net: macb: Migrate to devm clock interface

Nicolas Ferre
2013-10-15T07:44:40Z

On 15/10/2013 01:58, Soren Brinkmann :
> Migrate to using the device managed intreface for clocks and clean up
> the associated error paths.
>
> Signed-off-by: Soren Brinkmann <soren.brinkmann@xilinx.com>

Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>

> ---
> drivers/net/ethernet/cadence/macb.c | 32 ++++++++++++++++++++------------
> 1 file changed, 20 insertions(+), 12 deletions(-)
>
> diff --git a/drivers/net/ethernet/cadence/macb.c b/drivers/net/ethernet/cadence/macb.c
> index 389ccf1362d5..62aa136889a4 100644
> --- a/drivers/net/ethernet/cadence/macb.c
> +++ b/drivers/net/ethernet/cadence/macb.c
> @@ -1790,19 +1790,31 @@ static int __init macb_probe(struct platform_device *pdev)
> spin_lock_init(&bp->lock);
> INIT_WORK(&bp->tx_error_task, macb_tx_error_task);
>
> - bp->pclk = clk_get(&pdev->dev, "pclk");
> + bp->pclk = devm_clk_get(&pdev->dev, "pclk");
> if (IS_ERR(bp->pclk)) {
> - dev_err(&pdev->dev, "failed to get macb_clk\n");
> + err = PTR_ERR(bp->pclk);
> + dev_err(&pdev->dev, "failed to get macb_clk (%u)\n", err);
> goto err_out_free_dev;
> }
> - clk_prepare_enable(bp->pclk);
>
> - bp->hclk = clk_get(&pdev->dev, "hclk");
> + bp->hclk = devm_clk_get(&pdev->dev, "hclk");
> if (IS_ERR(bp->hclk)) {
> - dev_err(&pdev->dev, "failed to get hclk\n");
> - goto err_out_put_pclk;
> + err = PTR_ERR(bp->hclk);
> + dev_err(&pdev->dev, "failed to get hclk (%u)\n", err);
> + goto err_out_free_dev;
> + }
> +
> + err = clk_prepare_enable(bp->pclk);
> + if (err) {
> + dev_err(&pdev->dev, "failed to enable pclk (%u)\n", err);
> + goto err_out_free_dev;
> + }
> +
> + err = clk_prepare_enable(bp->hclk);
> + if (err) {
> + dev_err(&pdev->dev, "failed to enable hclk (%u)\n", err);
> + goto err_out_disable_pclk;
> }
> - clk_prepare_enable(bp->hclk);
>
> bp->regs = ioremap(regs->start, resource_size(regs));
> if (!bp->regs) {
> @@ -1908,10 +1920,8 @@ err_out_iounmap:
> iounmap(bp->regs);
> err_out_disable_clocks:
> clk_disable_unprepare(bp->hclk);
> - clk_put(bp->hclk);
> +err_out_disable_pclk:
> clk_disable_unprepare(bp->pclk);
> -err_out_put_pclk:
> - clk_put(bp->pclk);
> err_out_free_dev:
> free_netdev(dev);
> err_out:
> @@ -1936,9 +1946,7 @@ static int __exit macb_remove(struct platform_device *pdev)
> free_irq(dev->irq, dev);
> iounmap(bp->regs);
> clk_disable_unprepare(bp->hclk);
> - clk_put(bp->hclk);
> clk_disable_unprepare(bp->pclk);
> - clk_put(bp->pclk);
> free_netdev(dev);
> }
>
>

--
Nicolas Ferre