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authorVaradarajan Narayanan <varada@codeaurora.org>2017-06-09 15:02:58 +0530
committerLinus Walleij <linus.walleij@linaro.org>2017-06-29 15:12:40 +0200
commitd2a2c80815edfeecb189e6fbef8c2f2421018568 (patch)
tree5719e90a19a86c69fb21bfc0e28c06fccdd22d02 /Documentation
parentdf81b9411acc1d5d55fc03a99c7d5337400fed1c (diff)
pinctrl: qcom: Add ipq8074 pinctrl driver
Add initial pinctrl driver to support pin configuration with pinctrl framework for ipq8074. Signed-off-by: Manoharan Vijaya Raghavan <mraghava@codeaurora.org> Signed-off-by: Varadarajan Narayanan <varada@codeaurora.org> Acked-by: Rob Herring <robh@kernel.org> Acked-by: Bjorn Andersson <bjorn.andersson@linaro.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/devicetree/bindings/pinctrl/qcom,ipq8074-pinctrl.txt172
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diff --git a/Documentation/devicetree/bindings/pinctrl/qcom,ipq8074-pinctrl.txt b/Documentation/devicetree/bindings/pinctrl/qcom,ipq8074-pinctrl.txt
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+Qualcomm Technologies, Inc. IPQ8074 TLMM block
+
+This binding describes the Top Level Mode Multiplexer block found in the
+IPQ8074 platform.
+
+- compatible:
+ Usage: required
+ Value type: <string>
+ Definition: must be "qcom,ipq8074-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>
+
+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-gpio69
+
+- 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:
+ atest_char, atest_char0, atest_char1, atest_char2,
+ atest_char3, audio_rxbclk, audio_rxd, audio_rxfsync,
+ audio_rxmclk, audio_txbclk, audio_txd, audio_txfsync,
+ audio_txmclk, blsp0_i2c, blsp0_spi, blsp0_uart, blsp1_i2c,
+ blsp1_spi, blsp1_uart, blsp2_i2c, blsp2_spi, blsp2_uart,
+ blsp3_i2c, blsp3_spi, blsp3_spi0, blsp3_spi1, blsp3_spi2,
+ blsp3_spi3, blsp3_uart, blsp4_i2c0, blsp4_i2c1, blsp4_spi0,
+ blsp4_spi1, blsp4_uart0, blsp4_uart1, blsp5_i2c, blsp5_spi,
+ blsp5_uart, burn0, burn1, cri_trng, cri_trng0, cri_trng1,
+ cxc0, cxc1, dbg_out, gcc_plltest, gcc_tlmm, gpio, ldo_en,
+ ldo_update, led0, led1, led2, mac0_sa0, mac0_sa1, mac1_sa0,
+ mac1_sa1, mac1_sa2, mac1_sa3, mac2_sa0, mac2_sa1, mdc,
+ mdio, pcie0_clk, pcie0_rst, pcie0_wake, pcie1_clk,
+ pcie1_rst, pcie1_wake, pcm_drx, pcm_dtx, pcm_fsync,
+ pcm_pclk, pcm_zsi0, pcm_zsi1, prng_rosc, pta1_0, pta1_1,
+ pta1_2, pta2_0, pta2_1, pta2_2, pwm0, pwm1, pwm2, pwm3,
+ qdss_cti_trig_in_a0, qdss_cti_trig_in_a1,
+ qdss_cti_trig_in_b0, qdss_cti_trig_in_b1,
+ qdss_cti_trig_out_a0, qdss_cti_trig_out_a1,
+ qdss_cti_trig_out_b0, qdss_cti_trig_out_b1,
+ qdss_traceclk_a, qdss_traceclk_b, qdss_tracectl_a,
+ qdss_tracectl_b, qdss_tracedata_a, qdss_tracedata_b,
+ qpic, rx0, rx1, rx2, sd_card, sd_write, tsens_max, wci2a,
+ wci2b, wci2c, wci2d
+
+- bias-disable:
+ Usage: optional
+ Value type: <none>
+ Definition: The specified pins should be configued as no pull.
+
+- bias-pull-down:
+ Usage: optional
+ Value type: <none>
+ Definition: The specified pins should be configued as pull down.
+
+- bias-pull-up:
+ Usage: optional
+ Value type: <none>
+ Definition: The specified pins should be configued as pull up.
+
+- output-high:
+ Usage: optional
+ Value type: <none>
+ Definition: The specified pins are configured in output mode, driven
+ high.
+
+- output-low:
+ Usage: optional
+ Value type: <none>
+ Definition: The specified pins are configured in output mode, driven
+ low.
+
+- 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,ipq8074-pinctrl";
+ reg = <0x1000000 0x300000>;
+ interrupts = <GIC_SPI 208 IRQ_TYPE_LEVEL_HIGH>;
+ gpio-controller;
+ #gpio-cells = <2>;
+ interrupt-controller;
+ #interrupt-cells = <2>;
+
+ uart2: uart2-default {
+ mux {
+ pins = "gpio23", "gpio24";
+ function = "blsp4_uart1";
+ };
+
+ rx {
+ pins = "gpio23";
+ drive-strength = <4>;
+ bias-disable;
+ };
+
+ tx {
+ pins = "gpio24";
+ drive-strength = <2>;
+ bias-pull-up;
+ };
+ };
+ };