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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 13/07/23 01:34, Alexandre Belloni wrote: > EXTERNAL EMAIL: Do not click links or open attachments unless you know the content is safe > > On 12/07/2023 20:42:00+0100, Conor Dooley wrote: >>> There can be only one dbgu on a SoC and it has the chipid register. It >>> has always been wrong to have a dbgu compatible on the flexcom uart as >>> they are not dbgu. >> Ahh, thanks for the explanation. Sounds like stuff that might be obvious >> to those working on arm stuff all the time, but not all of those CCed on >> the patch ;) > Well, this is not really arm specific, rather microchip specific ;) > >> The correct thing to do would seem to be updating the dt-binding to >> something that permits what is listed below, or just removing the second >> compatible, to leave "microchip,sam9x60-usart" in isolation, since that >> is permitted also. Noted, I hope updating the yaml would be proper approach. >>> Anyway, my advice has always been that you must not do chipid detection >>> on at91 because there is no point in doing it because you need to have >>> a correct dts to be able to find the dbgu chipid register so you either >>> you already know what you are running on or you are going to read bogus >>> registers anyway. >> I won't claim to have an opinion on any of that, but sounds like you'd >> be better off just reading the board/SoC level compatibles to figure out >> what you are running on... >> > Yeah, exactly my point! > >> Thanks, >> Conor. >> >>>>> Fixes: 99c808335877 (ARM: dts: at91: sam9x60: Add missing flexcom definitions) >>>>> Signed-off-by: Durai Manickam KR >>>>> --- >>>>> arch/arm/boot/dts/microchip/sam9x60.dtsi | 26 ++++++++++++------------ >>>>> 1 file changed, 13 insertions(+), 13 deletions(-) >>>>> >>>>> diff --git a/arch/arm/boot/dts/microchip/sam9x60.dtsi b/arch/arm/boot/dts/microchip/sam9x60.dtsi >>>>> index 8b53997675e7..73d570a17269 100644 >>>>> --- a/arch/arm/boot/dts/microchip/sam9x60.dtsi >>>>> +++ b/arch/arm/boot/dts/microchip/sam9x60.dtsi >>>>> @@ -172,7 +172,7 @@ flx4: flexcom@f0000000 { >>>>> status = "disabled"; >>>>> >>>>> uart4: serial@200 { >>>>> - compatible = "microchip,sam9x60-dbgu", "microchip,sam9x60-usart", "atmel,at91sam9260-dbgu", "atmel,at91sam9260-usart"; >>>>> + compatible = "microchip,sam9x60-usart", "atmel,at91sam9260-usart"; >>>>> reg = <0x200 0x200>; >>>>> interrupts = <13 IRQ_TYPE_LEVEL_HIGH 7>; >>>>> dmas = <&dma0 >>>>> @@ -240,7 +240,7 @@ flx5: flexcom@f0004000 { >>>>> status = "disabled"; >>>>> >>>>> uart5: serial@200 { >>>>> - compatible = "microchip,sam9x60-dbgu", "microchip,sam9x60-usart", "atmel,at91sam9260-dbgu", "atmel,at91sam9260-usart"; >>>>> + compatible = "microchip,sam9x60-usart", "atmel,at91sam9260-usart"; >>>>> reg = <0x200 0x200>; >>>>> atmel,usart-mode = ; >>>>> interrupts = <14 IRQ_TYPE_LEVEL_HIGH 7>; >>>>> @@ -370,7 +370,7 @@ flx11: flexcom@f0020000 { >>>>> status = "disabled"; >>>>> >>>>> uart11: serial@200 { >>>>> - compatible = "microchip,sam9x60-dbgu", "microchip,sam9x60-usart", "atmel,at91sam9260-dbgu", "atmel,at91sam9260-usart"; >>>>> + compatible = "microchip,sam9x60-usart", "atmel,at91sam9260-usart"; >>>>> reg = <0x200 0x200>; >>>>> interrupts = <32 IRQ_TYPE_LEVEL_HIGH 7>; >>>>> dmas = <&dma0 >>>>> @@ -419,7 +419,7 @@ flx12: flexcom@f0024000 { >>>>> status = "disabled"; >>>>> >>>>> uart12: serial@200 { >>>>> - compatible = "microchip,sam9x60-dbgu", "microchip,sam9x60-usart", "atmel,at91sam9260-dbgu", "atmel,at91sam9260-usart"; >>>>> + compatible = "microchip,sam9x60-usart", "atmel,at91sam9260-usart"; >>>>> reg = <0x200 0x200>; >>>>> interrupts = <33 IRQ_TYPE_LEVEL_HIGH 7>; >>>>> dmas = <&dma0 >>>>> @@ -576,7 +576,7 @@ flx6: flexcom@f8010000 { >>>>> status = "disabled"; >>>>> >>>>> uart6: serial@200 { >>>>> - compatible = "microchip,sam9x60-dbgu", "microchip,sam9x60-usart", "atmel,at91sam9260-dbgu", "atmel,at91sam9260-usart"; >>>>> + compatible = "microchip,sam9x60-usart", "atmel,at91sam9260-usart"; >>>>> reg = <0x200 0x200>; >>>>> interrupts = <9 IRQ_TYPE_LEVEL_HIGH 7>; >>>>> dmas = <&dma0 >>>>> @@ -625,7 +625,7 @@ flx7: flexcom@f8014000 { >>>>> status = "disabled"; >>>>> >>>>> uart7: serial@200 { >>>>> - compatible = "microchip,sam9x60-dbgu", "microchip,sam9x60-usart", "atmel,at91sam9260-dbgu", "atmel,at91sam9260-usart"; >>>>> + compatible = "microchip,sam9x60-usart", "atmel,at91sam9260-usart"; >>>>> reg = <0x200 0x200>; >>>>> interrupts = <10 IRQ_TYPE_LEVEL_HIGH 7>; >>>>> dmas = <&dma0 >>>>> @@ -674,7 +674,7 @@ flx8: flexcom@f8018000 { >>>>> status = "disabled"; >>>>> >>>>> uart8: serial@200 { >>>>> - compatible = "microchip,sam9x60-dbgu", "microchip,sam9x60-usart", "atmel,at91sam9260-dbgu", "atmel,at91sam9260-usart"; >>>>> + compatible = "microchip,sam9x60-usart", "atmel,at91sam9260-usart"; >>>>> reg = <0x200 0x200>; >>>>> interrupts = <11 IRQ_TYPE_LEVEL_HIGH 7>; >>>>> dmas = <&dma0 >>>>> @@ -723,7 +723,7 @@ flx0: flexcom@f801c000 { >>>>> status = "disabled"; >>>>> >>>>> uart0: serial@200 { >>>>> - compatible = "microchip,sam9x60-dbgu", "microchip,sam9x60-usart", "atmel,at91sam9260-dbgu", "atmel,at91sam9260-usart"; >>>>> + compatible = "microchip,sam9x60-usart", "atmel,at91sam9260-usart"; >>>>> reg = <0x200 0x200>; >>>>> interrupts = <5 IRQ_TYPE_LEVEL_HIGH 7>; >>>>> dmas = <&dma0 >>>>> @@ -791,7 +791,7 @@ flx1: flexcom@f8020000 { >>>>> status = "disabled"; >>>>> >>>>> uart1: serial@200 { >>>>> - compatible = "microchip,sam9x60-dbgu", "microchip,sam9x60-usart", "atmel,at91sam9260-dbgu", "atmel,at91sam9260-usart"; >>>>> + compatible = "microchip,sam9x60-usart", "atmel,at91sam9260-usart"; >>>>> reg = <0x200 0x200>; >>>>> interrupts = <6 IRQ_TYPE_LEVEL_HIGH 7>; >>>>> dmas = <&dma0 >>>>> @@ -859,7 +859,7 @@ flx2: flexcom@f8024000 { >>>>> status = "disabled"; >>>>> >>>>> uart2: serial@200 { >>>>> - compatible = "microchip,sam9x60-dbgu", "microchip,sam9x60-usart", "atmel,at91sam9260-dbgu", "atmel,at91sam9260-usart"; >>>>> + compatible = "microchip,sam9x60-usart", "atmel,at91sam9260-usart"; >>>>> reg = <0x200 0x200>; >>>>> interrupts = <7 IRQ_TYPE_LEVEL_HIGH 7>; >>>>> dmas = <&dma0 >>>>> @@ -927,7 +927,7 @@ flx3: flexcom@f8028000 { >>>>> status = "disabled"; >>>>> >>>>> uart3: serial@200 { >>>>> - compatible = "microchip,sam9x60-dbgu", "microchip,sam9x60-usart", "atmel,at91sam9260-dbgu", "atmel,at91sam9260-usart"; >>>>> + compatible = "microchip,sam9x60-usart", "atmel,at91sam9260-usart"; >>>>> reg = <0x200 0x200>; >>>>> interrupts = <8 IRQ_TYPE_LEVEL_HIGH 7>; >>>>> dmas = <&dma0 >>>>> @@ -1050,7 +1050,7 @@ flx9: flexcom@f8040000 { >>>>> status = "disabled"; >>>>> >>>>> uart9: serial@200 { >>>>> - compatible = "microchip,sam9x60-dbgu", "microchip,sam9x60-usart", "atmel,at91sam9260-dbgu", "atmel,at91sam9260-usart"; >>>>> + compatible = "microchip,sam9x60-usart", "atmel,at91sam9260-usart"; >>>>> reg = <0x200 0x200>; >>>>> interrupts = <15 IRQ_TYPE_LEVEL_HIGH 7>; >>>>> dmas = <&dma0 >>>>> @@ -1099,7 +1099,7 @@ flx10: flexcom@f8044000 { >>>>> status = "disabled"; >>>>> >>>>> uart10: serial@200 { >>>>> - compatible = "microchip,sam9x60-dbgu", "microchip,sam9x60-usart", "atmel,at91sam9260-dbgu", "atmel,at91sam9260-usart"; >>>>> + compatible = "microchip,sam9x60-usart", "atmel,at91sam9260-usart"; >>>>> reg = <0x200 0x200>; >>>>> interrupts = <16 IRQ_TYPE_LEVEL_HIGH 7>; >>>>> dmas = <&dma0 >>>>> -- >>>>> 2.25.1 >>>>> >>> >>> >>> -- >>> Alexandre Belloni, co-owner and COO, Bootlin >>> Embedded Linux and Kernel engineering >>> https://bootlin.com > > > -- > Alexandre Belloni, co-owner and COO, Bootlin > Embedded Linux and Kernel engineering > https://bootlin.com _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel