On 05/23/2017 05:07 PM, Rob Herring wrote: > On Fri, May 19, 2017 at 02:45:24PM +0200, Fabrice Gasnier wrote: >> Document support for STM32H7 Analog to Digital Converter. >> Main difference is regarding compatible, clock definitions and new >> features like differential channels support: >> STM32H7 ADC block has two clock inputs, common clock for all ADCs. >> One 'bus' clock for registers access, and one optional 'adc' clock >> for analog circuitry (bus clock may be used for conversions). >> >> Signed-off-by: Fabrice Gasnier <fabrice.gasnier@xxxxxx> >> --- >> .../devicetree/bindings/iio/adc/st,stm32-adc.txt | 20 ++++++++++++++------ >> 1 file changed, 14 insertions(+), 6 deletions(-) >> >> diff --git a/Documentation/devicetree/bindings/iio/adc/st,stm32-adc.txt b/Documentation/devicetree/bindings/iio/adc/st,stm32-adc.txt >> index e35f9f1..9519d2e 100644 >> --- a/Documentation/devicetree/bindings/iio/adc/st,stm32-adc.txt >> +++ b/Documentation/devicetree/bindings/iio/adc/st,stm32-adc.txt >> @@ -21,11 +21,17 @@ own configurable sequence and trigger: >> Contents of a stm32 adc root node: >> ----------------------------------- >> Required properties: >> -- compatible: Should be "st,stm32f4-adc-core". >> +- compatible: Should be one of "st,stm32f4-adc-core" or "st,stm32h7-adc-core". > Reformat this to 1 per line. Hi Rob, I'll fix it in v2 > >> - reg: Offset and length of the ADC block register set. >> - interrupts: Must contain the interrupt for ADC block. >> -- clocks: Clock for the analog circuitry (common to all ADCs). >> -- clock-names: Must be "adc". >> +- clocks: Core can use up to two clocks, depending on part used: >> + - "adc" clock: for the analog circuitry, common to all ADCs. >> + It's required on stm32f4. >> + It's optional on stm32h7, bus clock will be used by default if not set. > The clocks listed should be all connections present, not policy as to > what clock you want to use for conversions. Shall I only mention it's optional on stm32h7 ? (e.g. remove "bus clock will...") > >> + - "bus" clock: for registers access, common to all ADCs. >> + It's unused on stm32f4. > s/unused/not present/ I'll fix it in v2 > >> + It's required on stm32h7. >> +- clock-names: Must be "adc" and/or "bus" depending on part used. >> - interrupt-controller: Identifies the controller node as interrupt-parent >> - vref-supply: Phandle to the vref input analog reference voltage. >> - #interrupt-cells = <1>; >> @@ -42,14 +48,16 @@ An ADC block node should contain at least one subnode, representing an >> ADC instance available on the machine. >> >> Required properties: >> -- compatible: Should be "st,stm32f4-adc". >> +- compatible: Should be one of "st,stm32f4-adc" or "st,stm32h7-adc". > One per line. I'll fix it in v2 > >> - reg: Offset of ADC instance in ADC block (e.g. may be 0x0, 0x100, 0x200). >> -- clocks: Input clock private to this ADC instance. >> +- clocks: Input clock private to this ADC instance. It's required only on >> + stm32f4, that has per instance clock input for registers access. > Does the h7 simply have the same parent connected to all ADC instances > or really doesn't have a per instance clock? For the former case, you > should still have a clock, but just all be the same parent. It's the second case. There's no per instance clock. Do you want me to rephrase a little ? e.g. like it's required on stm32f4 and not present on stm32h7 ? Please advise, Thanks for reviewing, Fabrice > >> - interrupt-parent: Phandle to the parent interrupt controller. >> - interrupts: IRQ Line for the ADC (e.g. may be 0 for adc@0, 1 for adc@100 or >> 2 for adc@200). >> - st,adc-channels: List of single-ended channels muxed for this ADC. >> - It can have up to 16 channels, numbered from 0 to 15 (resp. for in0..in15). >> + It can have up to 16 channels on stm32f4 or 20 channels on stm32h7, numbered >> + from 0 to 15 or 19 (resp. for in0..in15 or in0..in19). >> - #io-channel-cells = <1>: See the IIO bindings section "IIO consumers" in >> Documentation/devicetree/bindings/iio/iio-bindings.txt >> >> -- >> 1.9.1 >> >> >> _______________________________________________ >> linux-arm-kernel mailing list >> linux-arm-kernel@xxxxxxxxxxxxxxxxxxx >> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel -- To unsubscribe from this list: send the line "unsubscribe linux-iio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
