Re: [PATCH 2/2] dt-bindings: pinctrl: Add MSM8976 driver bindings and documentation

[Bjorn Andersson <bjorn.andersson@linaro.org>]

On Sat 05 Oct 03:59 PDT 2019, kholk11@gmail.com wrote:

> From: AngeloGioacchino Del Regno <kholk11@gmail.com>
> 
> Add the documentation for this new driver for pin configuration
> with the pinctrl framework on MSM8976/56 and its APQ variants.

You forgot your Signed-off-by on this patch.

Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>

Regards,
Bjorn

> ---
>  .../bindings/pinctrl/qcom,msm8976-pinctrl.txt | 183 ++++++++++++++++++
>  1 file changed, 183 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/pinctrl/qcom,msm8976-pinctrl.txt
> 
> diff --git a/Documentation/devicetree/bindings/pinctrl/qcom,msm8976-pinctrl.txt b/Documentation/devicetree/bindings/pinctrl/qcom,msm8976-pinctrl.txt
> new file mode 100644
> index 000000000000..70d04d12f136
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/pinctrl/qcom,msm8976-pinctrl.txt
> @@ -0,0 +1,183 @@
> +Qualcomm MSM8976 TLMM block
> +
> +This binding describes the Top Level Mode Multiplexer block found in the
> +MSM8956 and MSM8976 platforms.
> +
> +- compatible:
> +	Usage: required
> +	Value type: <string>
> +	Definition: must be "qcom,msm8976-pinctrl"
> +
> +- reg:
> +	Usage: required
> +	Value type: <prop-encoded-array>
> +	Definition: the base address and size of the TLMM register space.
> +
> +- interrupts:
> +	Usage: required
> +	Value type: <prop-encoded-array>
> +	Definition: should specify the TLMM summary IRQ.
> +
> +- interrupt-controller:
> +	Usage: required
> +	Value type: <none>
> +	Definition: identifies this node as an interrupt controller
> +
> +- #interrupt-cells:
> +	Usage: required
> +	Value type: <u32>
> +	Definition: must be 2. Specifying the pin number and flags, as defined
> +		    in <dt-bindings/interrupt-controller/irq.h>
> +
> +- gpio-controller:
> +	Usage: required
> +	Value type: <none>
> +	Definition: identifies this node as a gpio controller
> +
> +- #gpio-cells:
> +	Usage: required
> +	Value type: <u32>
> +	Definition: must be 2. Specifying the pin number and flags, as defined
> +		    in <dt-bindings/gpio/gpio.h>
> +
> +- gpio-ranges:
> +	Usage: required
> +	Definition:  see ../gpio/gpio.txt
> +
> +- gpio-reserved-ranges:
> +	Usage: optional
> +	Definition: see ../gpio/gpio.txt
> +
> +Please refer to ../gpio/gpio.txt and ../interrupt-controller/interrupts.txt for
> +a general description of GPIO and interrupt bindings.
> +
> +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".
> +
> +The 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, drive strength, etc.
> +
> +
> +PIN CONFIGURATION NODES:
> +
> +The name of each subnode is not important; all subnodes should be enumerated
> +and processed purely based on their content.
> +
> +Each subnode only affects those parameters that are explicitly listed. In
> +other words, a subnode that lists a mux function but no pin configuration
> +parameters implies no information about any pin configuration parameters.
> +Similarly, a pin subnode that describes a pullup parameter implies no
> +information about e.g. the mux function.
> +
> +
> +The following generic properties as defined in pinctrl-bindings.txt are valid
> +to specify in a pin configuration subnode:
> +
> +- pins:
> +	Usage: required
> +	Value type: <string-array>
> +	Definition: List of gpio pins affected by the properties specified in
> +		    this subnode.
> +
> +		    Valid pins are:
> +		      gpio0-gpio145
> +		        Supports mux, bias and drive-strength
> +
> +		      sdc1_clk, sdc1_cmd, sdc1_data,
> +		      sdc2_clk, sdc2_cmd, sdc2_data,
> +		      sdc3_clk, sdc3_cmd, sdc3_data
> +		        Supports bias and drive-strength
> +
> +- function:
> +	Usage: required
> +	Value type: <string>
> +	Definition: Specify the alternative function to be configured for the
> +		    specified pins. Functions are only valid for gpio pins.
> +		    Valid values are:
> +
> +		    gpio, blsp_uart1, blsp_spi1, smb_int, blsp_i2c1, blsp_spi2,
> +		    blsp_uart2, blsp_i2c2, gcc_gp1_clk_b, blsp_spi3,
> +		    qdss_tracedata_b, blsp_i2c3, gcc_gp2_clk_b, gcc_gp3_clk_b,
> +		    blsp_spi4, cap_int, blsp_i2c4, blsp_spi5, blsp_uart5,
> +		    qdss_traceclk_a, m_voc, blsp_i2c5, qdss_tracectl_a,
> +		    qdss_tracedata_a, blsp_spi6, blsp_uart6, qdss_tracectl_b,
> +		    blsp_i2c6, qdss_traceclk_b, mdp_vsync, pri_mi2s_mclk_a,
> +		    sec_mi2s_mclk_a, cam_mclk, cci0_i2c, cci1_i2c, blsp1_spi,
> +		    blsp3_spi, gcc_gp1_clk_a, gcc_gp2_clk_a, gcc_gp3_clk_a,
> +		    uim_batt, sd_write, uim1_data, uim1_clk, uim1_reset,
> +		    uim1_present, uim2_data, uim2_clk, uim2_reset,
> +		    uim2_present, ts_xvdd, mipi_dsi0, us_euro, ts_resout,
> +		    ts_sample, sec_mi2s_mclk_b, pri_mi2s, codec_reset,
> +		    cdc_pdm0, us_emitter, pri_mi2s_mclk_b, pri_mi2s_mclk_c,
> +		    lpass_slimbus, lpass_slimbus0, lpass_slimbus1, codec_int1,
> +		    codec_int2, wcss_bt, sdc3, wcss_wlan2, wcss_wlan1,
> +		    wcss_wlan0, wcss_wlan, wcss_fm, key_volp, key_snapshot,
> +		    key_focus, key_home, pwr_down, dmic0_clk, hdmi_int,
> +		    dmic0_data, wsa_vi, wsa_en, blsp_spi8, wsa_irq, blsp_i2c8,
> +		    pa_indicator, modem_tsync, ssbi_wtr1, gsm1_tx, gsm0_tx,
> +		    sdcard_det, sec_mi2s, ss_switch,
> +
> +- bias-disable:
> +	Usage: optional
> +	Value type: <none>
> +	Definition: The specified pins should be configured as no pull.
> +
> +- bias-pull-down:
> +	Usage: optional
> +	Value type: <none>
> +	Definition: The specified pins should be configured as pull down.
> +
> +- bias-pull-up:
> +	Usage: optional
> +	Value type: <none>
> +	Definition: The specified pins should be configured as pull up.
> +
> +- output-high:
> +	Usage: optional
> +	Value type: <none>
> +	Definition: The specified pins are configured in output mode, driven
> +		    high.
> +		    Not valid for sdc pins.
> +
> +- output-low:
> +	Usage: optional
> +	Value type: <none>
> +	Definition: The specified pins are configured in output mode, driven
> +		    low.
> +		    Not valid for sdc pins.
> +
> +- drive-strength:
> +	Usage: optional
> +	Value type: <u32>
> +	Definition: Selects the drive strength for the specified pins, in mA.
> +		    Valid values are: 2, 4, 6, 8, 10, 12, 14 and 16
> +
> +Example:
> +
> +	tlmm: pinctrl@1000000 {
> +		compatible = "qcom,msm8976-pinctrl";
> +		reg = <0x1000000 0x300000>;
> +		interrupts = <GIC_SPI 208 IRQ_TYPE_LEVEL_HIGH>;
> +		gpio-controller;
> +		#gpio-cells = <2>;
> +		gpio-ranges = <&tlmm 0 0 145>;
> +		interrupt-controller;
> +		#interrupt-cells = <2>;
> +
> +		blsp1_uart2_active: blsp1_uart2_active {
> +			mux {
> +				pins = "gpio4", "gpio5", "gpio6", "gpio7";
> +				function = "blsp_uart2";
> +			};
> +
> +			config {
> +				pins = "gpio4", "gpio5", "gpio6", "gpio7";
> +				drive-strength = <2>;
> +				bias-disable;
> +			};
> +		};
> +	};
> -- 
> 2.21.0
>