Re: [RFC PATCH] i2c: imx: dma map the i2c data i/o register

2019-01-17 Thread Laurentiu Tudor
Hi Robin, On 16.01.2019 19:55, Robin Murphy wrote: > On 16/01/2019 16:17, Laurentiu Tudor wrote: >> This is an attempt to fix an iommu exception when doing dma to the >> i2c controller with EDMA. Without these mappings the smmu raises a >> context fault [1] exactly with the address of the i2c data

Re: [RFC PATCH] i2c: imx: dma map the i2c data i/o register

2019-01-16 Thread Robin Murphy
On 16/01/2019 16:17, Laurentiu Tudor wrote: This is an attempt to fix an iommu exception when doing dma to the i2c controller with EDMA. Without these mappings the smmu raises a context fault [1] exactly with the address of the i2c data i/o reg. This was seen on an NXP LS1043A chip while working

[RFC PATCH] i2c: imx: dma map the i2c data i/o register

2019-01-16 Thread Laurentiu Tudor
This is an attempt to fix an iommu exception when doing dma to the i2c controller with EDMA. Without these mappings the smmu raises a context fault [1] exactly with the address of the i2c data i/o reg. This was seen on an NXP LS1043A chip while working on enabling SMMU. [1] arm-smmu 900.iommu: