diff options
| author |   Yong Wu <yong.wu@mediatek.com> | 2017-08-21 19:00:19 +0800 |
|---|---|---|
| committer |   Joerg Roedel <jroedel@suse.de> | 2017-08-22 16:37:59 +0200 |
| commit | 6254b64f570622d4ebb7af00d46229bfc7346212 (patch) | |
| tree | 0c81cc0819216f17081985f16e75bd41960f3742 /drivers/iommu | |
| parent | iommu/mediatek: Move pgtable allocation into domain_alloc (diff) | |
| download | linux-dev-6254b64f570622d4ebb7af00d46229bfc7346212.tar.xz linux-dev-6254b64f570622d4ebb7af00d46229bfc7346212.zip | |
iommu/mediatek: Disable iommu clock when system suspend
When system suspend, infra power domain may be off, and the iommu's
clock must be disabled when system off, or the iommu's bclk clock maybe
disabled after system resume.
Signed-off-by: Honghui Zhang <honghui.zhang@mediatek.com>
Signed-off-by: Yong Wu <yong.wu@mediatek.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu')
| -rw-r--r-- | drivers/iommu/mtk_iommu.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c index a82196c0c5df..e21de8634cba 100644 --- a/drivers/iommu/mtk_iommu.c +++ b/drivers/iommu/mtk_iommu.c @@ -675,6 +675,7 @@ static int __maybe_unused mtk_iommu_suspend(struct device *dev) reg->ctrl_reg = readl_relaxed(base + REG_MMU_CTRL_REG); reg->int_control0 = readl_relaxed(base + REG_MMU_INT_CONTROL0); reg->int_main_control = readl_relaxed(base + REG_MMU_INT_MAIN_CONTROL); + clk_disable_unprepare(data->bclk); return 0; } @@ -683,7 +684,13 @@ static int __maybe_unused mtk_iommu_resume(struct device *dev) struct mtk_iommu_data *data = dev_get_drvdata(dev); struct mtk_iommu_suspend_reg *reg = &data->reg; void __iomem *base = data->base; + int ret; + ret = clk_prepare_enable(data->bclk); + if (ret) { + dev_err(data->dev, "Failed to enable clk(%d) in resume\n", ret); + return ret; + } writel_relaxed(reg->standard_axi_mode, base + REG_MMU_STANDARD_AXI_MODE); writel_relaxed(reg->dcm_dis, base + REG_MMU_DCM_DIS); @@ -699,7 +706,7 @@ static int __maybe_unused mtk_iommu_resume(struct device *dev) } static const struct dev_pm_ops mtk_iommu_pm_ops = { - SET_SYSTEM_SLEEP_PM_OPS(mtk_iommu_suspend, mtk_iommu_resume) + SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(mtk_iommu_suspend, mtk_iommu_resume) }; static const struct of_device_id mtk_iommu_of_ids[] = { |