Hi Andy, On 09/07/2014 08:55 PM, Stanimir Varbanov wrote: > The BAM is tightly coupled with the peripheral to which it > belongs. In that sprit to access the BAM configuration > registers the driver needs to enable some peripheral > clocks. Currently the DT node enables bamclk which seems > is not enough for some peripherals (for example the crypto > engine wants core and iface clocks). This change attempts > to solve this issue by adding one more optional clock > in bam_dma driver. > What is your opinion on this patch? > Signed-off-by: Stanimir Varbanov <svarbanov@xxxxxxxxxx> > --- > .../devicetree/bindings/dma/qcom_bam_dma.txt | 12 ++++-- > drivers/dma/qcom_bam_dma.c | 44 +++++++++++++++------- > 2 files changed, 38 insertions(+), 18 deletions(-) > > diff --git a/Documentation/devicetree/bindings/dma/qcom_bam_dma.txt b/Documentation/devicetree/bindings/dma/qcom_bam_dma.txt > index d75a9d7..2376897 100644 > --- a/Documentation/devicetree/bindings/dma/qcom_bam_dma.txt > +++ b/Documentation/devicetree/bindings/dma/qcom_bam_dma.txt > @@ -6,8 +6,11 @@ Required properties: > - interrupts: Should contain the one interrupt shared by all channels > - #dma-cells: must be <1>, the cell in the dmas property of the client device > represents the channel number > -- clocks: required clock > -- clock-names: must contain "bam_clk" entry > +- clocks: list of required clock plus one optional clock. The optional clock > + is needed for some peripherals and can be omitted. > +- clock-names: must contain "core" clock name representing the required clock > + plus the optional "iface" clock name depending on > + peripheral needs. > - qcom,ee : indicates the active Execution Environment identifier (0-7) used in > the secure world. > > @@ -17,8 +20,9 @@ Example: > compatible = "qcom,bam-v1.4.0"; > reg = <0xf9984000 0x15000>; > interrupts = <0 94 0>; > - clocks = <&gcc GCC_BAM_DMA_AHB_CLK>; > - clock-names = "bam_clk"; > + clocks = <&gcc GCC_BLSP1_UART2_APPS_CLK>, > + <&gcc GCC_BLSP1_AHB_CLK>; > + clock-names = "core", "iface"; > #dma-cells = <1>; > qcom,ee = <0>; > }; -- regards, Stan -- To unsubscribe from this list: send the line "unsubscribe dmaengine" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
