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Message-ID: <1511946870.28444.7.camel@mtkswgap22>
Date: Wed, 29 Nov 2017 17:14:30 +0800
From: Sean Wang <sean.wang@...iatek.com>
To: Rob Herring <robh@...nel.org>
CC: <mark.rutland@....com>, <linus.walleij@...aro.org>,
<matthias.bgg@...il.com>, <devicetree@...r.kernel.org>,
<linux-mediatek@...ts.infradead.org>,
<linux-arm-kernel@...ts.infradead.org>,
<linux-gpio@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/4] dt-bindings: pinctrl: add bindings for MediaTek
MT7622 SoC
On Tue, 2017-11-28 at 09:20 -0600, Rob Herring wrote:
> On Tue, Nov 28, 2017 at 11:49:59AM +0800, sean.wang@...iatek.com wrote:
> > From: Sean Wang <sean.wang@...iatek.com>
> >
> > Add devicetree bindings for MediaTek MT7622 pinctrl driver.
> >
> > Signed-off-by: Sean Wang <sean.wang@...iatek.com>
> > ---
> > .../devicetree/bindings/pinctrl/pinctrl-mt7622.txt | 330 +++++++++++++++++++++
> > 1 file changed, 330 insertions(+)
> > create mode 100644 Documentation/devicetree/bindings/pinctrl/pinctrl-mt7622.txt
> >
> > diff --git a/Documentation/devicetree/bindings/pinctrl/pinctrl-mt7622.txt b/Documentation/devicetree/bindings/pinctrl/pinctrl-mt7622.txt
> > new file mode 100644
> > index 0000000..ce86d45
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/pinctrl/pinctrl-mt7622.txt
> > @@ -0,0 +1,330 @@
> > +== MediaTek MT7622 pinctrl controller ==
> > +
> > +Required properties for the root node:
> > + - compatible: Should be one of the following
> > + "mediatek,mt7622-pinctrl" for MT7622 SoC
> > + - reg: offset and length of the pinctrl space
> > +
> > + - gpio-controller: Marks the device node as a GPIO controller.
> > + - #gpio-cells: Should be two. The first cell is the pin number and the
> > + second is the GPIO flags.
> > +
> > +Please refer to pinctrl-bindings.txt in this directory for details of the
> > +common pinctrl bindings used by client devices, including the meaning of the
> > +phrase "pin configuration node".
> > +
> > +MT7622 pin configuration nodes act as a container for an arbitrary number of
> > +subnodes. Each of these subnodes represents some desired configuration for a
> > +pin, a group, or a list of pins or groups. This configuration can include the
> > +mux function to select on those pin(s)/group(s), and various pin configuration
> > +parameters, such as pull-up, slew rate, etc.
> > +
> > +We support 2 types of configuration nodes. Those nodes can be either pinmux
> > +nodes or pinconf nodes. Each configuration node can consist of multiple nodes
> > +describing the pinmux and pinconf options.
> > +
> > +The name of each subnode is no matter as long as it is unique; all subnodes
>
> s/is no matter/doesn't matter/
>
will be fixed
> > +should be enumerated and processed purely based on their content.
> > +
> > +== pinmux nodes content ==
> > +
> > +The following generic properties as defined in pinctrl-bindings.txt are valid
> > +to specify in a pinmux subnode:
> > +
> > +Required properties are:
> > + - groups: An array of strings. Each string contains the name of a group.
> > + Valid values for these names are listed below.
> > + - function: A string containing the name of the function to mux to the
> > + group. Valid values for function names are listed below.
> > +
> > +== pinconf nodes content ==
> > +
> > +The following generic properties as defined in pinctrl-bindings.txt are valid
> > +to specify in a pinconf subnode:
> > +
> > +Required properties are:
> > + - pins: An array of strings. Each string contains the name of a pin.
> > + Valid values for these names are listed below.
> > + - groups: An array of strings. Each string contains the name of a group.
> > + Valid values for these names are listed below.
> > +
> > +Optional properies are:
> > + bias-disable, bias-pull, bias-pull-down, input-enable,
> > + input-schmitt-enable, input-schmitt-disable, output-enable
> > + output-low, output-high, drive-strength, slew-rate
> > +
> > + Valid arguments for 'slew-rate' are '0' and '1' to select between slow and
> > + fast respectively.
> > + Valid arguments for 'drive-strength', 4, 8, 12, or 16 in mA.
> > +
> > +The following specific properties as defined are valid to specify in a pinconf
> > +subnode:
> > +
> > +Optional properties are:
> > + - mediatek,tdsel: Valid arguments are from 0 to 15
> > + - mediatek,rdsel: Valid arguments are from 0 to 63
>
> What are these properties controlling?
>
okay. these properties will be extended as below
Optional properties are:
- mediatek,tdsel: An integer describing the steps for output level
shifter duty cycle when asserted (high pulse width adjustment). Valid
arguments are from 0 to 15.
- mediatek,rdsel: An integer describing the steps for input level
shifter duty cycle when asserted (high pulse width adjustment). Valid
arguments are from 0 to 63.
> > +
> > +== Valid values for pins, function and groups on MT7622 ==
> > +
> > +Valid values for pins are:
> > +pins can be referenced via the pin names as the below table shown and the
> > +related physical number is also put ahead of those names which helps cross
> > +references to pins between groups to know whether pins assignment conflict
> > +happens among devices try to acquire those available pins.
> > +
> > + Pin #: Valid values for pins
> > + -----------------------------
> > + PIN 0: "GPIO_A"
> > + PIN 1: "I2S1_IN"
> > + PIN 2: "I2S1_OUT"
> > + PIN 3: "I2S_BCLK"
> > + PIN 4: "I2S_WS"
> > + PIN 5: "I2S_MCLK"
> > + PIN 6: "TXD0"
> > + PIN 7: "RXD0"
> > + PIN 8: "SPI_WP"
> > + PIN 9: "SPI_HOLD"
> > + PIN 10: "SPI_CLK"
> > + PIN 11: "SPI_MOSI"
> > + PIN 12: "SPI_MISO"
> > + PIN 13: "SPI_CS"
> > + PIN 14: "SPI_SDA"
> > + PIN 15: "SPI_SCL"
> > + PIN 16: "I2S2_IN"
> > + PIN 17: "I2S3_IN"
> > + PIN 18: "I2S4_IN"
> > + PIN 19: "I2S2_OUT"
> > + PIN 20: "I2S3_OUT"
> > + PIN 21: "I2S4_OUT"
> > + PIN 22: "GPIO_B"
> > + PIN 23: "MDC"
> > + PIN 24: "MDIO"
> > + PIN 25: "G2_TXD0"
> > + PIN 26: "G2_TXD1"
> > + PIN 27: "G2_TXD2"
> > + PIN 28: "G2_TXD3"
> > + PIN 29: "G2_TXEN"
> > + PIN 30: "G2_TXC"
> > + PIN 31: "G2_RXD0"
> > + PIN 32: "G2_RXD1"
> > + PIN 33: "G2_RXD2"
> > + PIN 34: "G2_RXD3"
> > + PIN 35: "G2_RXDV"
> > + PIN 36: "G2_RXC"
> > + PIN 37: "NCEB"
> > + PIN 38: "NWEB"
> > + PIN 39: "NREB"
> > + PIN 40: "NDL4"
> > + PIN 41: "NDL5"
> > + PIN 42: "NDL6"
> > + PIN 43: "NDL7"
> > + PIN 44: "NRB"
> > + PIN 45: "NCLE"
> > + PIN 46: "NALE"
> > + PIN 47: "NDL0"
> > + PIN 48: "NDL1"
> > + PIN 49: "NDL2"
> > + PIN 50: "NDL3"
> > + PIN 51: "MDI_TP_P0"
> > + PIN 52: "MDI_TN_P0"
> > + PIN 53: "MDI_RP_P0"
> > + PIN 54: "MDI_RN_P0"
> > + PIN 55: "MDI_TP_P1"
> > + PIN 56: "MDI_TN_P1"
> > + PIN 57: "MDI_RP_P1"
> > + PIN 58: "MDI_RN_P1"
> > + PIN 59: "MDI_RP_P2"
> > + PIN 60: "MDI_RN_P2"
> > + PIN 61: "MDI_TP_P2"
> > + PIN 62: "MDI_TN_P2"
> > + PIN 63: "MDI_TP_P3"
> > + PIN 64: "MDI_TN_P3"
> > + PIN 65: "MDI_RP_P3"
> > + PIN 66: "MDI_RN_P3"
> > + PIN 67: "MDI_RP_P4"
> > + PIN 68: "MDI_RN_P4"
> > + PIN 69: "MDI_TP_P4"
> > + PIN 70: "MDI_TN_P4"
> > + PIN 71: "SPI2_CK"
> > + PIN 72: "SPI2_DATA"
> > + PIN 73: "SPIC1_CLK"
> > + PIN 74: "SPIC1_MOSI"
> > + PIN 75: "SPIC1_MISO"
> > + PIN 76: "SPIC1_CS"
> > + PIN 77: "GPIO_D"
> > + PIN 78: "WATCHDOG"
> > + PIN 79: "RTS3_N"
> > + PIN 80: "CTS3_N"
> > + PIN 81: "TXD3"
> > + PIN 82: "RXD3"
> > + PIN 83: "PERST0_N"
> > + PIN 84: "PERST1_N"
> > + PIN 85: "WLED_N"
> > + PIN 86: "EPHY_LED0_N"
> > + PIN 87: "AUXIN0"
> > + PIN 88: "AUXIN1"
> > + PIN 89: "AUXIN2"
> > + PIN 90: "AUXIN3"
> > + PIN 91: "TXD4"
> > + PIN 92: "RXD4"
> > + PIN 93: "RTS4_IN"
> > + PIN 94: "CST4_IN"
> > + PIN 95: "PWM1"
> > + PIN 96: "PWM2"
> > + PIN 97: "PWM3"
> > + PIN 98: "PWM4"
> > + PIN 99: "PWM5"
> > + PIN 100: "PWM6"
> > + PIN 101: "PWM7"
> > + PIN 102: "GPIO_E"
> > +
> > +Valid values for function are:
> > + "emmc", "eth", "i2c", "i2s", "ir", "led", "flash", "pcie",
> > + "pwm", "sd", "spi", "tdm", "uart"
> > +
> > +Valid values for groups are:
> > +additional data is put followingly with valid value allowing us to know which
> > +applicable function and which relevant pins (in pin#) are able applied for that
> > +group.
> > +
> > + Valid value function pins (in pin#)
> > + -------------------------------------------------------------------------
> > + "emmc" "emmc" 40, 41, 42, 43, 44, 45,
> > + 47, 48, 49, 50
> > + "esw" "eth" 59, 60, 61, 62, 63, 64,
> > + 65, 66, 67, 68, 69, 70
> > + "mdc_mdio" "eth" 23, 24
> > + "gmac1" "eth" 59, 60, 61, 62, 63, 64,
> > + 65, 66, 67, 68, 69, 70
> > + "gmac2" "eth" 25, 26, 27, 28, 29, 30,
> > + 31, 32, 33, 34, 35, 36
> > + "i2c0" "i2c" 14, 15
> > + "i2c1_0" "i2c" 55, 56
> > + "i2c1_1" "i2c" 73, 74
> > + "i2c1_2" "i2c" 87, 88
> > + "i2c2_0" "i2c" 57, 58
> > + "i2c2_1" "i2c" 75, 76
> > + "i2c2_2" "i2c" 89, 90
> > + "i2s_in_bclk_ws_mclk" "i2s" 3, 4, 5
> > + "i2s1_in_data" "i2s" 1
> > + "i2s2_in_data" "i2s" 16
> > + "i2s3_in_data" "i2s" 17
> > + "i2s4_in_data" "i2s" 18
> > + "i2s_out_bclk_ws_mclk" "i2s" 3, 4, 5
> > + "i2s1_out_data" "i2s" 2
> > + "i2s2_out_data" "i2s" 19
> > + "i2s3_out_data" "i2s" 20
> > + "i2s4_out_data" "i2s" 21
> > + "ir_0_tx" "ir" 16
> > + "ir_1_tx" "ir" 59
> > + "ir_2_tx" "ir" 99
> > + "ir_0_rx" "ir" 17
> > + "ir_1_rx" "ir" 60
> > + "ir_2_rx" "ir" 100
> > + "ephy0_led" "led" 86
> > + "ephy1_led" "led" 91
> > + "ephy2_led" "led" 92
> > + "ephy3_led" "led" 93
> > + "ephy4_led" "led" 94
> > + "wled" "led" 85
> > + "par_nand" "flash" 37, 38, 39, 40, 41, 42,
> > + 43, 44, 45, 46, 47, 48,
> > + 49, 50
> > + "snfi" "flash" 8, 9, 10, 11, 12, 13
> > + "spi_nor" "flash" 8, 9, 10, 11, 12, 13
> > + "pcie0_0_waken_clkreq" "pcie" 14, 15
> > + "pcie0_1_waken_clkreq" "pcie" 79, 80
> > + "pcie1_0_waken_clkreq" "pcie" 14, 15
> > + "pcie0_pad_perst" "pcie" 83
> > + "pcie1_pad_perst" "pcie" 84
> > + "pwm_ch1_0" "pwm" 51
> > + "pwm_ch1_1" "pwm" 73
> > + "pwm_ch1_2" "pwm" 95
> > + "pwm_ch2_0" "pwm" 52
> > + "pwm_ch2_1" "pwm" 74
> > + "pwm_ch2_2" "pwm" 96
> > + "pwm_ch3_0" "pwm" 53
> > + "pwm_ch3_1" "pwm" 75
> > + "pwm_ch3_2" "pwm" 97
> > + "pwm_ch4_0" "pwm" 54
> > + "pwm_ch4_1" "pwm" 67
> > + "pwm_ch4_2" "pwm" 76
> > + "pwm_ch4_3" "pwm" 98
> > + "pwm_ch5_0" "pwm" 68
> > + "pwm_ch5_1" "pwm" 77
> > + "pwm_ch5_2" "pwm" 99
> > + "pwm_ch6_0" "pwm" 69
> > + "pwm_ch6_1" "pwm" 78
> > + "pwm_ch6_2" "pwm" 81
> > + "pwm_ch6_3" "pwm" 100
> > + "pwm_ch7_0" "pwm" 70
> > + "pwm_ch7_1" "pwm" 82
> > + "pwm_ch7_2" "pwm" 101
>
> Mixed space and tabs.
>
will be fixed
> > + "sd_0" "sd" 16, 17, 18, 19, 20, 21
> > + "sd_1" "sd" 25, 26, 27, 28, 29, 30
> > + "spic0_0" "spi" 63, 64, 65, 66
> > + "spic0_1" "spi" 79, 80, 81, 82
> > + "spic1_0" "spi" 67, 68, 69, 70
> > + "spic1_1" "spi" 73, 74, 75, 76
> > + "tdm_0_out_mclk_bclk" "tdm" 8, 9, 10
> > + "tdm_0_in_mclk_bclk_ws" "tdm" 11, 12, 13
> > + "tdm_0_out_data" "tdm" 20
> > + "tdm_0_in_data" "tdm" 21
> > + "tdm_1_out_mclk_bclk" "tdm" 57, 58, 59
> > + "tdm_1_in_mclk_bclk_ws" "tdm" 60, 61, 62
> > + "tdm_1_out_data" "tdm" 55
> > + "tdm_1_in_data" "tdm" 56
> > + "uart0_0_tx_rx" "uart" 6, 7
> > + "uart1_0_tx_rx" "uart" 55, 56
> > + "uart1_0_rts_cts" "uart" 57, 58
> > + "uart1_1_tx_rx" "uart" 73, 74
> > + "uart1_1_rts_cts" "uart" 75, 76
> > + "uart2_0_tx_rx" "uart" 3, 4
> > + "uart2_0_rts_cts" "uart" 1, 2
> > + "uart2_1_tx_rx" "uart" 51, 52
> > + "uart2_1_rts_cts" "uart" 53, 54
> > + "uart2_2_tx_rx" "uart" 59, 60
> > + "uart2_2_rts_cts" "uart" 61, 62
> > + "uart2_3_tx_rx" "uart" 95, 96
> > + "uart3_0_tx_rx" "uart" 57, 58
> > + "uart3_1_tx_rx" "uart" 81, 82
> > + "uart3_1_rts_cts" "uart" 79, 80
> > + "uart4_0_tx_rx" "uart" 61, 62
> > + "uart4_1_tx_rx" "uart" 91, 92
> > + "uart4_1_rts_cts" "uart" 93, 94
> > + "uart4_2_tx_rx" "uart" 97, 98
> > + "uart4_2_rts_cts" "uart" 95, 96
> > +
> > +Example:
> > +
> > + pio: pinctrl@...11000 {
> > + compatible = "mediatek,mt7622-pinctrl";
> > + reg = <0 0x10211000 0 0x1000>;
> > + gpio-controller;
> > + #gpio-cells = <2>;
> > +
> > + pinctrl_eth_default: eth-default {
> > + mux_mdio {
>
> s/_/-/
>
will be fixed
> > + groups = "mdc_mdio";
> > + function = "eth";
> > + drive-strength = <12>;
> > + };
> > +
> > + mux_gmac2 {
>
> ditto
>
will be fixed
> > + groups = "gmac2";
> > + function = "eth";
> > + drive-strength = <12>;
> > + };
> > +
> > + mux_esw {
will be fixed
> > + groups = "esw";
> > + function = "eth";
> > + drive-strength = <8>;
> > + };
> > +
> > + conf_mdio {
will be fixed
> > + pins = "MDC";
> > + bias-pull-up;
> > + };
> > + };
> > + };
> > --
> > 2.7.4
> >
>
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