On Mon, Jul 01, 2019 at 10:59:41AM +0530, Manish Narani wrote: > The clock handling is to be updated in the Arasan SDHCI. As the > 'devm_clk_register' is deprecated in the clock framework, this needs to > specify one more clock named 'clk_sdcard' to get the clock in the driver > via 'devm_clk_get()'. This clock represents the clock from controller to > the card. Please explain why in terms of the binding, not some driver calls. > Signed-off-by: Manish Narani <manish.narani@xxxxxxxxxx> > --- > Documentation/devicetree/bindings/mmc/arasan,sdhci.txt | 15 ++++++++++----- > 1 file changed, 10 insertions(+), 5 deletions(-) > > diff --git a/Documentation/devicetree/bindings/mmc/arasan,sdhci.txt b/Documentation/devicetree/bindings/mmc/arasan,sdhci.txt > index 1edbb04..15c6397 100644 > --- a/Documentation/devicetree/bindings/mmc/arasan,sdhci.txt > +++ b/Documentation/devicetree/bindings/mmc/arasan,sdhci.txt > @@ -23,6 +23,10 @@ Required Properties: > - reg: From mmc bindings: Register location and length. > - clocks: From clock bindings: Handles to clock inputs. > - clock-names: From clock bindings: Tuple including "clk_xin" and "clk_ahb" > + Apart from these two there is one more optional clock which > + is "clk_sdcard". This clock represents output clock from > + controller and card. This must be specified when #clock-cells > + is specified. > - interrupts: Interrupt specifier > > Required Properties for "arasan,sdhci-5.1": > @@ -36,9 +40,10 @@ Optional Properties: > - clock-output-names: If specified, this will be the name of the card clock > which will be exposed by this device. Required if #clock-cells is > specified. > - - #clock-cells: If specified this should be the value <0>. With this property > - in place we will export a clock representing the Card Clock. This clock > - is expected to be consumed by our PHY. You must also specify > + - #clock-cells: If specified this should be the value <0>. With this > + property in place we will export one clock representing the Card > + Clock. This clock is expected to be consumed by our PHY. You must also > + specify specify what? The 3rd clock input I assume? This statement means any existing users with 2 clock inputs and #clock-cells are in error now. Is that correct? > - xlnx,fails-without-test-cd: when present, the controller doesn't work when > the CD line is not connected properly, and the line is not connected > properly. Test mode can be used to force the controller to function. > @@ -70,8 +75,8 @@ Example: > compatible = "rockchip,rk3399-sdhci-5.1", "arasan,sdhci-5.1"; > reg = <0x0 0xfe330000 0x0 0x10000>; > interrupts = <GIC_SPI 11 IRQ_TYPE_LEVEL_HIGH>; > - clocks = <&cru SCLK_EMMC>, <&cru ACLK_EMMC>; > - clock-names = "clk_xin", "clk_ahb"; > + clocks = <&cru SCLK_EMMC>, <&cru ACLK_EMMC>, <&sdhci 0>; > + clock-names = "clk_xin", "clk_ahb", "clk_sdcard"; > arasan,soc-ctl-syscon = <&grf>; > assigned-clocks = <&cru SCLK_EMMC>; > assigned-clock-rates = <200000000>; > -- > 2.1.1 >
