From ea664b1bdc19f3884f9d2966b106b3ca8d253426 Mon Sep 17 00:00:00 2001 From: Josua Mayer Date: Tue, 9 Jul 2019 15:01:00 +0200 Subject: [PATCH] net: mvmdio: print warning when orion-mdio has too many clocks Print a warning when device tree specifies more than the maximum of four clocks supported by orion-mdio. Because reading from mdio can lock up the Armada 8k when a required clock is not initialized, it is important to notify the user when a specified clock is ignored. Signed-off-by: Josua Mayer Reviewed-by: Andrew Lunn Signed-off-by: David S. Miller --- drivers/net/ethernet/marvell/mvmdio.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/net/ethernet/marvell/mvmdio.c b/drivers/net/ethernet/marvell/mvmdio.c index e17d563e97a6..eba18065a4da 100644 --- a/drivers/net/ethernet/marvell/mvmdio.c +++ b/drivers/net/ethernet/marvell/mvmdio.c @@ -326,6 +326,10 @@ static int orion_mdio_probe(struct platform_device *pdev) clk_prepare_enable(dev->clk[i]); } + if (!IS_ERR(of_clk_get(pdev->dev.of_node, ARRAY_SIZE(dev->clk)))) + dev_warn(&pdev->dev, "unsupported number of clocks, limiting to the first " + __stringify(ARRAY_SIZE(dev->clk)) "\n"); + dev->err_interrupt = platform_get_irq(pdev, 0); if (dev->err_interrupt > 0 && resource_size(r) < MVMDIO_ERR_INT_MASK + 4) { -- 2.30.2