iommu/rockchip: make clock handling optional
From: Heiko Stuebner <heiko@...> Date: Mon, 9 Apr 2018 23:01:35 +0200
Commit-Message
iommu clocks are optional, so the driver should not fail if they are not present. Instead just set the number of clocks to 0, which the clk-blk APIs can handle just fine. Fixes: f2e3a5f557ad ("iommu/rockchip: Control clocks needed to access the IOMMU") Signed-off-by: Heiko Stuebner <heiko@...>
Patch-Comment
drivers/iommu/rockchip-iommu.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-)
Statistics
- 6 lines added
- 2 lines removed
Changes
------------------------ drivers/iommu/rockchip-iommu.c ------------------------
index 5fc8656c60f9..7215c683cb8f 100644
@@ -1176,8 +1176,12 @@ static int rk_iommu_probe(struct platform_device *pdev)
iommu->clocks[i].id = rk_iommu_clocks[i];
err = devm_clk_bulk_get(iommu->dev, iommu->num_clocks, iommu->clocks);
+ if (err) {
+ if (err == -ENOENT)
+ iommu->num_clocks = 0;
+ else
+ return err;
+ }
err = clk_bulk_prepare(iommu->num_clocks, iommu->clocks);
if (err)