On Fri 20 Dec 2019 at 10:16, Jian Hu <jian.hu@xxxxxxxxxxx> wrote: > There are four I2C controllers in A1 series, > Share the same comptible with AXG. Compared to AXG, > Drive strength feature is newly added in A1. > > Signed-off-by: Jian Hu <jian.hu@xxxxxxxxxxx> > > --- > This patch depends on A1 clock patchset at [0][3] > > Changes since v1 at [1]: > -change reg length to 0x20 > -assign i2c bus alias in dts file > -add new feature note compared to AXG in changelog > > Changes since v2 at [2]: > -remove the dependence the commit description > -remove i2c alias in dtsi > -reorder the i2c nodes > -reorder the i2c pins > > [0] https://lkml.kernel.org/r/20191206074052.15557-1-jian.hu@xxxxxxxxxxx > [1] https://lkml.kernel.org/r/20191202111253.94872-1-jian.hu@xxxxxxxxxxx > [2] https://lkml.kernel.org/r/20191211032802.83309-1-jian.hu@xxxxxxxxxxx > [3] https://lkml.kernel.org/r/20191206074052.15557-1-jian.hu@xxxxxxxxxxx > --- > --- > arch/arm64/boot/dts/amlogic/meson-a1.dtsi | 142 ++++++++++++++++++++++ > 1 file changed, 142 insertions(+) > > diff --git a/arch/arm64/boot/dts/amlogic/meson-a1.dtsi b/arch/arm64/boot/dts/amlogic/meson-a1.dtsi > index eab2ecd36aa8..1542eeee699d 100644 > --- a/arch/arm64/boot/dts/amlogic/meson-a1.dtsi > +++ b/arch/arm64/boot/dts/amlogic/meson-a1.dtsi > @@ -117,6 +117,16 @@ > }; > }; > > + i2c0: i2c@1400 { > + compatible = "amlogic,meson-axg-i2c"; > + reg = <0x0 0x1400 0x0 0x20>; > + interrupts = <GIC_SPI 32 IRQ_TYPE_EDGE_RISING>; > + #address-cells = <1>; > + #size-cells = <0>; > + clocks = <&clkc_periphs CLKID_I2C_M_A>; > + status = "disabled"; > + }; > + > uart_AO: serial@1c00 { > compatible = "amlogic,meson-gx-uart", > "amlogic,meson-ao-uart"; > @@ -136,6 +146,36 @@ > clock-names = "xtal", "pclk", "baud"; > status = "disabled"; > }; > + > + i2c1: i2c@5c00 { > + compatible = "amlogic,meson-axg-i2c"; > + reg = <0x0 0x5c00 0x0 0x20>; > + interrupts = <GIC_SPI 68 IRQ_TYPE_EDGE_RISING>; > + #address-cells = <1>; > + #size-cells = <0>; > + clocks = <&clkc_periphs CLKID_I2C_M_B>; > + status = "disabled"; > + }; > + > + i2c2: i2c@6800 { > + compatible = "amlogic,meson-axg-i2c"; > + reg = <0x0 0x6800 0x0 0x20>; > + interrupts = <GIC_SPI 76 IRQ_TYPE_EDGE_RISING>; > + #address-cells = <1>; > + #size-cells = <0>; > + clocks = <&clkc_periphs CLKID_I2C_M_C>; > + status = "disabled"; > + }; > + > + i2c3: i2c@6c00 { > + compatible = "amlogic,meson-axg-i2c"; > + reg = <0x0 0x6c00 0x0 0x20>; > + interrupts = <GIC_SPI 78 IRQ_TYPE_EDGE_RISING>; > + #address-cells = <1>; > + #size-cells = <0>; > + clocks = <&clkc_periphs CLKID_I2C_M_D>; > + status = "disabled"; > + }; > }; > > gic: interrupt-controller@ff901000 { > @@ -171,3 +211,105 @@ > #clock-cells = <0>; > }; > }; > + > +&periphs_pinctrl { Why is this not directly under the periphs_pinctrl node ? > + i2c0_f9_pins:i2c0-f9 { ^ Missing space here. Same for the other nodes > + mux { > + groups = "i2c0_sck_f9", > + "i2c0_sda_f10"; > + function = "i2c0"; > + bias-pull-up; Most device we have seen so far have the pull-up on the PCB. If you look at the other dts file, the i2c pad bias is disabled. If the pull-up resistor is missing on the PCB, this setting can overloaded in the board dt. Bottom line please put "bias-disable" or justify why a1 is different from the SoC. > + drive-strength-microamp = <3000>; > + }; > + }; > + > + i2c0_f11_pins:i2c0-f11 { > + mux { > + groups = "i2c0_sck_f11", > + "i2c0_sda_f12"; > + function = "i2c0"; > + bias-pull-up; > + drive-strength-microamp = <3000>; > + }; > + }; > + > + i2c1_a_pins:i2c1-a { > + mux { > + groups = "i2c1_sck_a", > + "i2c1_sda_a"; > + function = "i2c1"; > + bias-pull-up; > + drive-strength-microamp = <3000>; > + }; > + }; > + > + i2c1_x_pins:i2c1-x { > + mux { > + groups = "i2c1_sck_x", > + "i2c1_sda_x"; > + function = "i2c1"; > + bias-pull-up; > + drive-strength-microamp = <3000>; > + }; > + }; > + > + i2c2_a4_pins:i2c2-a4 { > + mux { > + groups = "i2c2_sck_a4", > + "i2c2_sda_a5"; > + function = "i2c2"; > + bias-pull-up; > + drive-strength-microamp = <3000>; > + }; > + }; > + > + i2c2_a8_pins:i2c2-a8 { > + mux { > + groups = "i2c2_sck_a8", > + "i2c2_sda_a9"; > + function = "i2c2"; > + bias-pull-up; > + drive-strength-microamp = <3000>; > + }; > + }; > + > + i2c2_x0_pins:i2c2-x0 { > + mux { > + groups = "i2c2_sck_x0", > + "i2c2_sda_x1"; > + function = "i2c2"; > + bias-pull-up; > + drive-strength-microamp = <3000>; > + }; > + }; > + > + i2c2_x15_pins:i2c2-x15 { > + mux { > + groups = "i2c2_sck_x15", > + "i2c2_sda_x16"; > + function = "i2c2"; > + bias-pull-up; > + drive-strength-microamp = <3000>; > + }; > + }; > + > + i2c3_f_pins:i2c3-f { > + mux { > + groups = "i2c3_sck_f", > + "i2c3_sda_f"; > + function = "i2c3"; > + bias-pull-up; > + drive-strength-microamp = <3000>; > + }; > + }; > + > + i2c3_x_pins:i2c3-x { > + mux { > + groups = "i2c3_sck_x", > + "i2c3_sda_x"; > + function = "i2c3"; > + bias-pull-up; > + drive-strength-microamp = <3000>; > + }; > + }; > +};
