| Message ID | TYZPR01MB5556D24A77DAFA013F93B551C9E4A@TYZPR01MB5556.apcprd01.prod.exchangelabs.com (mailing list archive) |
|---|---|
| State | Changes Requested |
| Headers | show |
| Series | [v3] arm64: dts: ipq5018: Correct uart1_pins pinconf | expand |
On 01/09/2023 15:10, Ziyang Huang wrote: > In pinctrl, the pinconfigs for uart are named "blspX_uartY". > X is the UART ID. Starts from 1. > 1-6 are in BLSP Block 1. > 7-12 are in BLSP Block 2. > Y is the index of mux config. Starts from 0. > > In dts, the serials are also named "blspX_uartY", but with different logic. > X is the BLSP Block ID. Starts from 1. > Y is the uart id inside block. > In "ipq6018.dtsi" and "ipq8074.dtsi", it starts from 1. > But in "ipq5332.dtsi" and "ipq9574.dtsi", it starts from 0. > > +-----------------+-----------------+-------------+-----------------+ > | Block ID | ID inside Block | dts name | pinconfig name | > | (Starts from 1) | (Starts from 1) | | | > +-----------------+-----------------+-------------+-----------------+ > | 1 | 1 | blsp1_uart1 | blsp0_uartY | > | 1 | 2 | blsp1_uart2 | blsp1_uartY | > | 1 | 6 | blsp1_uart6 | blsp5_uartY | > | 2 | 1 | blsp2_uart1 | blsp6_uartY | > | 2 | 6 | blsp2_uart6 | blsp12_uartY | > +-----------------+-----------------+-------------+-----------------+ > > In "ipq5018.dts", "blsp1_uart1" (dts name) is the first serial (confimed > by the address), So its pinconfig should be "blsp0_uart0" (pinconfig name, > use GPIO 20 and 21) or "blsp0_uart1" (pinconfig name, use GPIO 28 and 29). > > Fixes: 570006756a16 ("arm64: dts: Add ipq5018 SoC and rdp432-c2 board support") > Signed-off-by: Ziyang Huang <hzyitc@outlook.com> > --- > Changes since v1: > - Use corrent name in From > > Changes since v2: > - Define 2 pinconfs for uart1 in ipq5018.dtsi > - rdp432-c2 use uart1_pins_a > > arch/arm64/boot/dts/qcom/ipq5018-rdp432-c2.dts | 2 +- > arch/arm64/boot/dts/qcom/ipq5018.dtsi | 15 +++++++++++---- > 2 files changed, 12 insertions(+), 5 deletions(-) > > diff --git a/arch/arm64/boot/dts/qcom/ipq5018-rdp432-c2.dts b/arch/arm64/boot/dts/qcom/ipq5018-rdp432-c2.dts > index e636a1cb9b77..e83d1863e89c 100644 > --- a/arch/arm64/boot/dts/qcom/ipq5018-rdp432-c2.dts > +++ b/arch/arm64/boot/dts/qcom/ipq5018-rdp432-c2.dts > @@ -23,7 +23,7 @@ chosen { > }; > > &blsp1_uart1 { > - pinctrl-0 = <&uart1_pins>; > + pinctrl-0 = <&uart1_pins_a>; > pinctrl-names = "default"; > status = "okay"; > }; > diff --git a/arch/arm64/boot/dts/qcom/ipq5018.dtsi b/arch/arm64/boot/dts/qcom/ipq5018.dtsi > index 9f13d2dcdfd5..50b4a2bd6fd3 100644 > --- a/arch/arm64/boot/dts/qcom/ipq5018.dtsi > +++ b/arch/arm64/boot/dts/qcom/ipq5018.dtsi > @@ -103,11 +103,18 @@ tlmm: pinctrl@1000000 { > interrupt-controller; > #interrupt-cells = <2>; > > - uart1_pins: uart1-state { > - pins = "gpio31", "gpio32", "gpio33", "gpio34"; > - function = "blsp1_uart1"; > + uart1_pins_a: uart1@0 { > + pins = "gpio20", "gpio21"; > + function = "blsp0_uart0"; > drive-strength = <8>; > - bias-pull-down; > + bias-disabled; > + }; > + > + uart1_pins_b: uart1@1 { > + pins = "gpio28", "gpio29"; > + function = "blsp0_uart1"; > + drive-strength = <8>; > + bias-disabled; > }; > }; > The assignment of pins 20 and 21 to blsp1_uart1 is not correct. The blspX_uartY in pinctrl should match what is in the dtsi so assigning pins_a above to blsp1_uart1 is not right. The dts name and pinctrl name should be the same. Your console is on blsp0_uart0. https://git.codelinaro.org/clo/qsdk/oss/boot/u-boot-2016/-/blob/5343739b4070bcec2fecd72f758c16adc31a3083/arch/arm/dts/ipq5018-mp03.3.dts#L33 So roughly speaking arch/arm64/boot/dts/qcom/ipq5018-rdp432-c2.dts aliases { serial0 = &blsp0_uart0; }; chosen { stdout-path = "serial0:115200n8"; }; &blsp0_uart0 { pinctrl-0 = <&uart0_pins>; pinctrl-names = "default"; status = "okay"; }; arch/arm64/boot/dts/qcom/ipq5018.dtsi blsp0_uart0: serial@78af000 either that or blsp0_uart1 for pins28 and pins29 - you seem to indicate pins_1 => blsp0_uart0. The two roots of the problem are 1. Mislabeling of the uart block in the dtsi 2. Invalid miscongiruation of pins for that misnamed block The fix should be 1. Fix the labeling of uart in the dtsi 2. Decide on which pins gpio20, gpio21 ? are the right ones to configure I thought you said in a previous email if you changed pins gpio28 and gpio29 that the UART would fail if so that implies blsp0_uart1. Either way the pinctrl and dts should agree. --- bod
On 1.09.2023 16:10, Ziyang Huang wrote: > In pinctrl, the pinconfigs for uart are named "blspX_uartY". > X is the UART ID. Starts from 1. > 1-6 are in BLSP Block 1. > 7-12 are in BLSP Block 2. > Y is the index of mux config. Starts from 0. > > In dts, the serials are also named "blspX_uartY", but with different logic. > X is the BLSP Block ID. Starts from 1. > Y is the uart id inside block. > In "ipq6018.dtsi" and "ipq8074.dtsi", it starts from 1. > But in "ipq5332.dtsi" and "ipq9574.dtsi", it starts from 0. > > +-----------------+-----------------+-------------+-----------------+ > | Block ID | ID inside Block | dts name | pinconfig name | > | (Starts from 1) | (Starts from 1) | | | > +-----------------+-----------------+-------------+-----------------+ > | 1 | 1 | blsp1_uart1 | blsp0_uartY | > | 1 | 2 | blsp1_uart2 | blsp1_uartY | > | 1 | 6 | blsp1_uart6 | blsp5_uartY | > | 2 | 1 | blsp2_uart1 | blsp6_uartY | > | 2 | 6 | blsp2_uart6 | blsp12_uartY | > +-----------------+-----------------+-------------+-----------------+ > > In "ipq5018.dts", "blsp1_uart1" (dts name) is the first serial (confimed > by the address), So its pinconfig should be "blsp0_uart0" (pinconfig name, > use GPIO 20 and 21) or "blsp0_uart1" (pinconfig name, use GPIO 28 and 29). Surely only one pair of wires is connected? Why is there an "OR"? Konrad
在 2023/9/1 23:04, Bryan O'Donoghue 写道: > <...> > > The assignment of pins 20 and 21 to blsp1_uart1 is not correct. > > The blspX_uartY in pinctrl should match what is in the dtsi so assigning > pins_a above to blsp1_uart1 is not right. The dts name and pinctrl name > should be the same. > > Your console is on blsp0_uart0. > > https://git.codelinaro.org/clo/qsdk/oss/boot/u-boot-2016/-/blob/5343739b4070bcec2fecd72f758c16adc31a3083/arch/arm/dts/ipq5018-mp03.3.dts#L33 > > So roughly speaking > > arch/arm64/boot/dts/qcom/ipq5018-rdp432-c2.dts > > aliases { > serial0 = &blsp0_uart0; > }; > > chosen { > stdout-path = "serial0:115200n8"; > }; > > &blsp0_uart0 { > pinctrl-0 = <&uart0_pins>; > pinctrl-names = "default"; > status = "okay"; > }; > > > arch/arm64/boot/dts/qcom/ipq5018.dtsi > > blsp0_uart0: serial@78af000 > > either that or blsp0_uart1 for pins28 and pins29 - you seem to indicate > pins_1 => blsp0_uart0. > > The two roots of the problem are > > 1. Mislabeling of the uart block in the dtsi > 2. Invalid miscongiruation of pins for that misnamed block > > The fix should be > > 1. Fix the labeling of uart in the dtsi > 2. Decide on which pins gpio20, gpio21 ? are the right ones to configure > > I thought you said in a previous email if you changed pins gpio28 and > gpio29 that the UART would fail if so that implies blsp0_uart1. > > Either way the pinctrl and dts should agree. > > --- > bod > No, please read my commit message carefully. The Y of pinctrl is the index of pinmux config. So it can't be used in the serial node definition. Please note that the physical port of first serial is configurable. It can use gpio20, gpio21 or/and gpio28,29. All of these pins are for the first serial. Let's take the second serial as an example. It has 3 configurable physical port groups - "blsp1_uart0" (pinconfig name, use GPIO 10,11,12,13), "blsp1_uart1" (gpio 31,32,33,34), "blsp1_uart2" (gpio 23,24,25,26). But the dts name of the second serial definition is "blsp1_uart2". Because it the second serial of the first BLSP block. Same logic. The dts name of the first serial definition is "blsp1_uart1". Because it the first serial of the first BLSP block. I think I need to introduce the architecture of these SoC. It has two BLSP block. Each BLSP block has several uart port. So the dts name of serial contains the BLSP index and the serial index inside BLSP. But pinconf name doesn't care about it. So it use global index. And due to the physical ports are configurable, it need pinmux index. The equation will be like this: dts name of serial definition: "blspX_uartY" pinconf name: "blspU_uartV" U = (uart_number_inside_each_blsp * (X - 1)) + (Y - 1)
在 2023/9/2 20:22, Konrad Dybcio 写道: > On 1.09.2023 16:10, Ziyang Huang wrote: >> In pinctrl, the pinconfigs for uart are named "blspX_uartY". >> X is the UART ID. Starts from 1. >> 1-6 are in BLSP Block 1. >> 7-12 are in BLSP Block 2. >> Y is the index of mux config. Starts from 0. >> >> In dts, the serials are also named "blspX_uartY", but with different logic. >> X is the BLSP Block ID. Starts from 1. >> Y is the uart id inside block. >> In "ipq6018.dtsi" and "ipq8074.dtsi", it starts from 1. >> But in "ipq5332.dtsi" and "ipq9574.dtsi", it starts from 0. >> >> +-----------------+-----------------+-------------+-----------------+ >> | Block ID | ID inside Block | dts name | pinconfig name | >> | (Starts from 1) | (Starts from 1) | | | >> +-----------------+-----------------+-------------+-----------------+ >> | 1 | 1 | blsp1_uart1 | blsp0_uartY | >> | 1 | 2 | blsp1_uart2 | blsp1_uartY | >> | 1 | 6 | blsp1_uart6 | blsp5_uartY | >> | 2 | 1 | blsp2_uart1 | blsp6_uartY | >> | 2 | 6 | blsp2_uart6 | blsp12_uartY | >> +-----------------+-----------------+-------------+-----------------+ >> >> In "ipq5018.dts", "blsp1_uart1" (dts name) is the first serial (confimed >> by the address), So its pinconfig should be "blsp0_uart0" (pinconfig name, >> use GPIO 20 and 21) or "blsp0_uart1" (pinconfig name, use GPIO 28 and 29). > Surely only one pair of wires is connected? Why is there an "OR"? > > Konrad Because it is configurable. Please read my previous email. And these two groups can be connected at same time. This is what u-boot does. It just like the parallel circuit. So there can be "or/and". lol...
On 01/09/2023 16:10, Ziyang Huang wrote: > In pinctrl, the pinconfigs for uart are named "blspX_uartY". > X is the UART ID. Starts from 1. > 1-6 are in BLSP Block 1. > 7-12 are in BLSP Block 2. > Y is the index of mux config. Starts from 0. > > In dts, the serials are also named "blspX_uartY", but with different logic. > X is the BLSP Block ID. Starts from 1. > Y is the uart id inside block. > In "ipq6018.dtsi" and "ipq8074.dtsi", it starts from 1. > But in "ipq5332.dtsi" and "ipq9574.dtsi", it starts from 0. > > +-----------------+-----------------+-------------+-----------------+ > | Block ID | ID inside Block | dts name | pinconfig name | > | (Starts from 1) | (Starts from 1) | | | > +-----------------+-----------------+-------------+-----------------+ > | 1 | 1 | blsp1_uart1 | blsp0_uartY | > | 1 | 2 | blsp1_uart2 | blsp1_uartY | > | 1 | 6 | blsp1_uart6 | blsp5_uartY | > | 2 | 1 | blsp2_uart1 | blsp6_uartY | > | 2 | 6 | blsp2_uart6 | blsp12_uartY | > +-----------------+-----------------+-------------+-----------------+ > > In "ipq5018.dts", "blsp1_uart1" (dts name) is the first serial (confimed > by the address), So its pinconfig should be "blsp0_uart0" (pinconfig name, > use GPIO 20 and 21) or "blsp0_uart1" (pinconfig name, use GPIO 28 and 29). > > Fixes: 570006756a16 ("arm64: dts: Add ipq5018 SoC and rdp432-c2 board support") > Signed-off-by: Ziyang Huang <hzyitc@outlook.com> > --- > Changes since v1: > - Use corrent name in From > > Changes since v2: > - Define 2 pinconfs for uart1 in ipq5018.dtsi > - rdp432-c2 use uart1_pins_a > > arch/arm64/boot/dts/qcom/ipq5018-rdp432-c2.dts | 2 +- > arch/arm64/boot/dts/qcom/ipq5018.dtsi | 15 +++++++++++---- > 2 files changed, 12 insertions(+), 5 deletions(-) > > diff --git a/arch/arm64/boot/dts/qcom/ipq5018-rdp432-c2.dts b/arch/arm64/boot/dts/qcom/ipq5018-rdp432-c2.dts > index e636a1cb9b77..e83d1863e89c 100644 > --- a/arch/arm64/boot/dts/qcom/ipq5018-rdp432-c2.dts > +++ b/arch/arm64/boot/dts/qcom/ipq5018-rdp432-c2.dts > @@ -23,7 +23,7 @@ chosen { > }; > > &blsp1_uart1 { > - pinctrl-0 = <&uart1_pins>; > + pinctrl-0 = <&uart1_pins_a>; > pinctrl-names = "default"; > status = "okay"; > }; > diff --git a/arch/arm64/boot/dts/qcom/ipq5018.dtsi b/arch/arm64/boot/dts/qcom/ipq5018.dtsi > index 9f13d2dcdfd5..50b4a2bd6fd3 100644 > --- a/arch/arm64/boot/dts/qcom/ipq5018.dtsi > +++ b/arch/arm64/boot/dts/qcom/ipq5018.dtsi > @@ -103,11 +103,18 @@ tlmm: pinctrl@1000000 { > interrupt-controller; > #interrupt-cells = <2>; > > - uart1_pins: uart1-state { > - pins = "gpio31", "gpio32", "gpio33", "gpio34"; > - function = "blsp1_uart1"; > + uart1_pins_a: uart1@0 { Regardless of other topics, change to @0 is neither correct, nor explained in commit msg. It does not look like you tested the DTS against bindings. Please run `make dtbs_check W=1` (see Documentation/devicetree/bindings/writing-schema.rst or https://www.linaro.org/blog/tips-and-tricks-for-validating-devicetree-sources-with-the-devicetree-schema/ for instructions). Best regards, Krzysztof
On 03/09/2023 14:02, Ziyang Huang wrote: > 在 2023/9/1 23:04, Bryan O'Donoghue 写道: >> <...> >> >> The assignment of pins 20 and 21 to blsp1_uart1 is not correct. >> >> The blspX_uartY in pinctrl should match what is in the dtsi so >> assigning pins_a above to blsp1_uart1 is not right. The dts name and >> pinctrl name should be the same. >> >> Your console is on blsp0_uart0. >> >> https://git.codelinaro.org/clo/qsdk/oss/boot/u-boot-2016/-/blob/5343739b4070bcec2fecd72f758c16adc31a3083/arch/arm/dts/ipq5018-mp03.3.dts#L33 >> >> So roughly speaking >> >> arch/arm64/boot/dts/qcom/ipq5018-rdp432-c2.dts >> >> aliases { >> serial0 = &blsp0_uart0; >> }; >> >> chosen { >> stdout-path = "serial0:115200n8"; >> }; >> >> &blsp0_uart0 { >> pinctrl-0 = <&uart0_pins>; >> pinctrl-names = "default"; >> status = "okay"; >> }; >> >> >> arch/arm64/boot/dts/qcom/ipq5018.dtsi >> >> blsp0_uart0: serial@78af000 >> >> either that or blsp0_uart1 for pins28 and pins29 - you seem to >> indicate pins_1 => blsp0_uart0. >> >> The two roots of the problem are >> >> 1. Mislabeling of the uart block in the dtsi >> 2. Invalid miscongiruation of pins for that misnamed block >> >> The fix should be >> >> 1. Fix the labeling of uart in the dtsi >> 2. Decide on which pins gpio20, gpio21 ? are the right ones to configure >> >> I thought you said in a previous email if you changed pins gpio28 and >> gpio29 that the UART would fail if so that implies blsp0_uart1. >> >> Either way the pinctrl and dts should agree. >> >> --- >> bod >> > > No, please read my commit message carefully. > > The Y of pinctrl is the index of pinmux config. So it can't be used in > the serial node definition. > > Please note that the physical port of first serial is configurable. It > can use gpio20, gpio21 or/and gpio28,29. All of these pins are for the > first serial. > > Let's take the second serial as an example. It has 3 configurable > physical port groups - "blsp1_uart0" (pinconfig name, use GPIO > 10,11,12,13), "blsp1_uart1" (gpio 31,32,33,34), "blsp1_uart2" (gpio > 23,24,25,26). > > But the dts name of the second serial definition is "blsp1_uart2". > Because it the second serial of the first BLSP block. > > Same logic. The dts name of the first serial definition is > "blsp1_uart1". Because it the first serial of the first BLSP block. > > I think I need to introduce the architecture of these SoC. It has two > BLSP block. Each BLSP block has several uart port. > > So the dts name of serial contains the BLSP index and the serial index > inside BLSP. But pinconf name doesn't care about it. So it use global > index. And due to the physical ports are configurable, it need pinmux > index. > > The equation will be like this: > > dts name of serial definition: "blspX_uartY" > pinconf name: "blspU_uartV" > U = (uart_number_inside_each_blsp * (X - 1)) + (Y - 1) I've checked the documentation for this chip. gpio20, gpio21 = blsp0_uart0 gpio28, gpio29 = blsp0_uart0 These pins are muxed to UART0, I agree, the u-boot dts also indicates this also. If we open the documentation further we see 0x78AF000 = BLSP1_BLSP_UART0 0x79b0000 = BLSP1_BLSP_UART1 So for starters the dtsi has the _wrong_ label. Here/anseo grep uart0: arch/arm64/boot/dts/qcom/* arch/arm64/boot/dts/qcom/ipq5332.dtsi: blsp1_uart0: serial@78af000 { arch/arm64/boot/dts/qcom/ipq9574.dtsi: blsp1_uart0: serial@78af000 { That's how that label ought to be the main hint something is askance is assigning a pin named "blsp0_uart0" to a dts entry named "blsp1_uart1". Please update the label in your next revision. --- bod
On 9/4/2023 6:27 AM, Bryan O'Donoghue wrote: > On 03/09/2023 14:02, Ziyang Huang wrote: >> 在 2023/9/1 23:04, Bryan O'Donoghue 写道: >>> <...> >>> >>> The assignment of pins 20 and 21 to blsp1_uart1 is not correct. >>> >>> The blspX_uartY in pinctrl should match what is in the dtsi so >>> assigning pins_a above to blsp1_uart1 is not right. The dts name and >>> pinctrl name should be the same. >>> >>> Your console is on blsp0_uart0. >>> >>> https://git.codelinaro.org/clo/qsdk/oss/boot/u-boot-2016/-/blob/5343739b4070bcec2fecd72f758c16adc31a3083/arch/arm/dts/ipq5018-mp03.3.dts#L33 >>> >>> >>> So roughly speaking >>> >>> arch/arm64/boot/dts/qcom/ipq5018-rdp432-c2.dts >>> >>> aliases { >>> serial0 = &blsp0_uart0; >>> }; >>> >>> chosen { >>> stdout-path = "serial0:115200n8"; >>> }; >>> >>> &blsp0_uart0 { >>> pinctrl-0 = <&uart0_pins>; >>> pinctrl-names = "default"; >>> status = "okay"; >>> }; >>> >>> >>> arch/arm64/boot/dts/qcom/ipq5018.dtsi >>> >>> blsp0_uart0: serial@78af000 >>> >>> either that or blsp0_uart1 for pins28 and pins29 - you seem to >>> indicate pins_1 => blsp0_uart0. >>> >>> The two roots of the problem are >>> >>> 1. Mislabeling of the uart block in the dtsi >>> 2. Invalid miscongiruation of pins for that misnamed block >>> >>> The fix should be >>> >>> 1. Fix the labeling of uart in the dtsi >>> 2. Decide on which pins gpio20, gpio21 ? are the right ones to configure >>> >>> I thought you said in a previous email if you changed pins gpio28 and >>> gpio29 that the UART would fail if so that implies blsp0_uart1. >>> >>> Either way the pinctrl and dts should agree. >>> >>> --- >>> bod >>> >> >> No, please read my commit message carefully. >> >> The Y of pinctrl is the index of pinmux config. So it can't be used in >> the serial node definition. >> >> Please note that the physical port of first serial is configurable. It >> can use gpio20, gpio21 or/and gpio28,29. All of these pins are for the >> first serial. >> >> Let's take the second serial as an example. It has 3 configurable >> physical port groups - "blsp1_uart0" (pinconfig name, use GPIO >> 10,11,12,13), "blsp1_uart1" (gpio 31,32,33,34), "blsp1_uart2" (gpio >> 23,24,25,26). >> >> But the dts name of the second serial definition is "blsp1_uart2". >> Because it the second serial of the first BLSP block. >> >> Same logic. The dts name of the first serial definition is >> "blsp1_uart1". Because it the first serial of the first BLSP block. >> >> I think I need to introduce the architecture of these SoC. It has two >> BLSP block. Each BLSP block has several uart port. >> >> So the dts name of serial contains the BLSP index and the serial index >> inside BLSP. But pinconf name doesn't care about it. So it use global >> index. And due to the physical ports are configurable, it need pinmux >> index. >> >> The equation will be like this: >> >> dts name of serial definition: "blspX_uartY" >> pinconf name: "blspU_uartV" >> U = (uart_number_inside_each_blsp * (X - 1)) + (Y - 1) > > I've checked the documentation for this chip. > > gpio20, gpio21 = blsp0_uart0 > gpio28, gpio29 = blsp0_uart0 > > These pins are muxed to UART0, I agree, the u-boot dts also indicates > this also. > > If we open the documentation further we see > > 0x78AF000 = BLSP1_BLSP_UART0 > 0x79b0000 = BLSP1_BLSP_UART1 > > So for starters the dtsi has the _wrong_ label. > > Here/anseo > > grep uart0: arch/arm64/boot/dts/qcom/* > arch/arm64/boot/dts/qcom/ipq5332.dtsi: blsp1_uart0: serial@78af000 { > arch/arm64/boot/dts/qcom/ipq9574.dtsi: blsp1_uart0: serial@78af000 { > > That's how that label ought to be the main hint something is askance is > assigning a pin named "blsp0_uart0" to a dts entry named "blsp1_uart1". > > Please update the label in your next revision. > Agree here, both label (to blsp1_uart0) and pins needs to be updated (as in this patch). Regards, Sricharan
在 2023/9/4 8:57, Bryan O'Donoghue 写道: > <...> > > I've checked the documentation for this chip. > > gpio20, gpio21 = blsp0_uart0 > gpio28, gpio29 = blsp0_uart0 > > These pins are muxed to UART0, I agree, the u-boot dts also indicates > this also. > > If we open the documentation further we see > > 0x78AF000 = BLSP1_BLSP_UART0 > 0x79b0000 = BLSP1_BLSP_UART1 > > So for starters the dtsi has the _wrong_ label. > > Here/anseo > > grep uart0: arch/arm64/boot/dts/qcom/* > arch/arm64/boot/dts/qcom/ipq5332.dtsi: blsp1_uart0: serial@78af000 { > arch/arm64/boot/dts/qcom/ipq9574.dtsi: blsp1_uart0: serial@78af000 { > > That's how that label ought to be the main hint something is askance is > assigning a pin named "blsp0_uart0" to a dts entry named "blsp1_uart1". > > Please update the label in your next revision. > > --- > bod I think the root cause is the confused name in pinctrl. I will update the mux index to alphabetical order in next patch. By the way, can you find out the documents about the pinmux map. For example, the code of pinctrl only show that GPIO20,21 are for UART0. But which pin is TX and which is RX? And yes, because of UART, it's easy to find out. But what I want to known is "blsp2_spi". It has 3 pinmux configs - "blsp2_spi" (GPIO27), "blsp2_spi0" (GPIO31,32,33,34) and "blsp2_spi1" (GPIO23,24,25,26). What "blsp2_spi" (GPIO27) for?
diff --git a/arch/arm64/boot/dts/qcom/ipq5018-rdp432-c2.dts b/arch/arm64/boot/dts/qcom/ipq5018-rdp432-c2.dts index e636a1cb9b77..e83d1863e89c 100644 --- a/arch/arm64/boot/dts/qcom/ipq5018-rdp432-c2.dts +++ b/arch/arm64/boot/dts/qcom/ipq5018-rdp432-c2.dts @@ -23,7 +23,7 @@ chosen { }; &blsp1_uart1 { - pinctrl-0 = <&uart1_pins>; + pinctrl-0 = <&uart1_pins_a>; pinctrl-names = "default"; status = "okay"; }; diff --git a/arch/arm64/boot/dts/qcom/ipq5018.dtsi b/arch/arm64/boot/dts/qcom/ipq5018.dtsi index 9f13d2dcdfd5..50b4a2bd6fd3 100644 --- a/arch/arm64/boot/dts/qcom/ipq5018.dtsi +++ b/arch/arm64/boot/dts/qcom/ipq5018.dtsi @@ -103,11 +103,18 @@ tlmm: pinctrl@1000000 { interrupt-controller; #interrupt-cells = <2>; - uart1_pins: uart1-state { - pins = "gpio31", "gpio32", "gpio33", "gpio34"; - function = "blsp1_uart1"; + uart1_pins_a: uart1@0 { + pins = "gpio20", "gpio21"; + function = "blsp0_uart0"; drive-strength = <8>; - bias-pull-down; + bias-disabled; + }; + + uart1_pins_b: uart1@1 { + pins = "gpio28", "gpio29"; + function = "blsp0_uart1"; + drive-strength = <8>; + bias-disabled; }; };
In pinctrl, the pinconfigs for uart are named "blspX_uartY". X is the UART ID. Starts from 1. 1-6 are in BLSP Block 1. 7-12 are in BLSP Block 2. Y is the index of mux config. Starts from 0. In dts, the serials are also named "blspX_uartY", but with different logic. X is the BLSP Block ID. Starts from 1. Y is the uart id inside block. In "ipq6018.dtsi" and "ipq8074.dtsi", it starts from 1. But in "ipq5332.dtsi" and "ipq9574.dtsi", it starts from 0. +-----------------+-----------------+-------------+-----------------+ | Block ID | ID inside Block | dts name | pinconfig name | | (Starts from 1) | (Starts from 1) | | | +-----------------+-----------------+-------------+-----------------+ | 1 | 1 | blsp1_uart1 | blsp0_uartY | | 1 | 2 | blsp1_uart2 | blsp1_uartY | | 1 | 6 | blsp1_uart6 | blsp5_uartY | | 2 | 1 | blsp2_uart1 | blsp6_uartY | | 2 | 6 | blsp2_uart6 | blsp12_uartY | +-----------------+-----------------+-------------+-----------------+ In "ipq5018.dts", "blsp1_uart1" (dts name) is the first serial (confimed by the address), So its pinconfig should be "blsp0_uart0" (pinconfig name, use GPIO 20 and 21) or "blsp0_uart1" (pinconfig name, use GPIO 28 and 29). Fixes: 570006756a16 ("arm64: dts: Add ipq5018 SoC and rdp432-c2 board support") Signed-off-by: Ziyang Huang <hzyitc@outlook.com> --- Changes since v1: - Use corrent name in From Changes since v2: - Define 2 pinconfs for uart1 in ipq5018.dtsi - rdp432-c2 use uart1_pins_a arch/arm64/boot/dts/qcom/ipq5018-rdp432-c2.dts | 2 +- arch/arm64/boot/dts/qcom/ipq5018.dtsi | 15 +++++++++++---- 2 files changed, 12 insertions(+), 5 deletions(-)