lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
Open Source and information security mailing list archives
| ||
|
Date: Tue, 1 Jan 2019 11:55:39 +0800 From: Yong Wu <yong.wu@...iatek.com> To: Joerg Roedel <joro@...tes.org>, Matthias Brugger <matthias.bgg@...il.com>, Robin Murphy <robin.murphy@....com>, Rob Herring <robh+dt@...nel.org> CC: Tomasz Figa <tfiga@...gle.com>, Will Deacon <will.deacon@....com>, <linux-mediatek@...ts.infradead.org>, <srv_heupstream@...iatek.com>, <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org>, <iommu@...ts.linux-foundation.org>, <arnd@...db.de>, <yingjoe.chen@...iatek.com>, <yong.wu@...iatek.com>, <youlin.pei@...iatek.com>, Nicolas Boichat <drinkcat@...omium.org> Subject: [PATCH v5 07/20] iommu/mediatek: Add bclk can be supported optionally In some SoCs, M4U doesn't have its "bclk", it will use the EMI clock instead which has always been enabled when entering kernel. This also is a preparing patch for mt8183. Signed-off-by: Yong Wu <yong.wu@...iatek.com> --- drivers/iommu/mtk_iommu.c | 10 +++++++--- drivers/iommu/mtk_iommu.h | 3 +++ 2 files changed, 10 insertions(+), 3 deletions(-) diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c index ae1aa5a..847082c 100644 --- a/drivers/iommu/mtk_iommu.c +++ b/drivers/iommu/mtk_iommu.c @@ -613,9 +613,11 @@ static int mtk_iommu_probe(struct platform_device *pdev) if (data->irq < 0) return data->irq; - data->bclk = devm_clk_get(dev, "bclk"); - if (IS_ERR(data->bclk)) - return PTR_ERR(data->bclk); + if (data->plat_data->has_bclk) { + data->bclk = devm_clk_get(dev, "bclk"); + if (IS_ERR(data->bclk)) + return PTR_ERR(data->bclk); + } larb_nr = of_count_phandle_with_args(dev->of_node, "mediatek,larbs", NULL); @@ -739,11 +741,13 @@ static int __maybe_unused mtk_iommu_resume(struct device *dev) static const struct mtk_iommu_plat_data mt2712_data = { .m4u_plat = M4U_MT2712, .has_4gb_mode = true, + .has_bclk = true, }; static const struct mtk_iommu_plat_data mt8173_data = { .m4u_plat = M4U_MT8173, .has_4gb_mode = true, + .has_bclk = true, }; static const struct of_device_id mtk_iommu_of_ids[] = { diff --git a/drivers/iommu/mtk_iommu.h b/drivers/iommu/mtk_iommu.h index 5890e55..b8749ac 100644 --- a/drivers/iommu/mtk_iommu.h +++ b/drivers/iommu/mtk_iommu.h @@ -44,6 +44,9 @@ enum mtk_iommu_plat { struct mtk_iommu_plat_data { enum mtk_iommu_plat m4u_plat; bool has_4gb_mode; + + /* HW will use the EMI clock if there isn't the "bclk". */ + bool has_bclk; }; struct mtk_iommu_domain; -- 1.9.1
Powered by blists - more mailing lists