Documentation/devicetree/bindings/pinctrl/qcom,msm8960-pinctrl.txt

   1 Qualcomm MSM8960 TLMM block
   2
   3 This binding describes the Top Level Mode Multiplexer block found in the
   4 MSM8960 platform.
   5
   6 - compatible:
   7         Usage: required
   8         Value type: <string>
   9         Definition: must be "qcom,msm8960-pinctrl"
  10
  11 - reg:
  12         Usage: required
  13         Value type: <prop-encoded-array>
  14         Definition: the base address and size of the TLMM register space.
  15
  16 - interrupts:
  17         Usage: required
  18         Value type: <prop-encoded-array>
  19         Definition: should specify the TLMM summary IRQ.
  20
  21 - interrupt-controller:
  22         Usage: required
  23         Value type: <none>
  24         Definition: identifies this node as an interrupt controller
  25
  26 - #interrupt-cells:
  27         Usage: required
  28         Value type: <u32>
  29         Definition: must be 2. Specifying the pin number and flags, as defined
  30                     in <dt-bindings/interrupt-controller/irq.h>
  31
  32 - gpio-controller:
  33         Usage: required
  34         Value type: <none>
  35         Definition: identifies this node as a gpio controller
  36
  37 - #gpio-cells:
  38         Usage: required
  39         Value type: <u32>
  40         Definition: must be 2. Specifying the pin number and flags, as defined
  41                     in <dt-bindings/gpio/gpio.h>
  42
  43 Please refer to ../gpio/gpio.txt and ../interrupt-controller/interrupts.txt for
  44 a general description of GPIO and interrupt bindings.
  45
  46 Please refer to pinctrl-bindings.txt in this directory for details of the
  47 common pinctrl bindings used by client devices, including the meaning of the
  48 phrase "pin configuration node".
  49
  50 The pin configuration nodes act as a container for an abitrary number of
  51 subnodes. Each of these subnodes represents some desired configuration for a
  52 pin, a group, or a list of pins or groups. This configuration can include the
  53 mux function to select on those pin(s)/group(s), and various pin configuration
  54 parameters, such as pull-up, drive strength, etc.
  55
  56
  57 PIN CONFIGURATION NODES:
  58
  59 The name of each subnode is not important; all subnodes should be enumerated
  60 and processed purely based on their content.
  61
  62 Each subnode only affects those parameters that are explicitly listed. In
  63 other words, a subnode that lists a mux function but no pin configuration
  64 parameters implies no information about any pin configuration parameters.
  65 Similarly, a pin subnode that describes a pullup parameter implies no
  66 information about e.g. the mux function.
  67
  68
  69 The following generic properties as defined in pinctrl-bindings.txt are valid
  70 to specify in a pin configuration subnode:
  71
  72 - pins:
  73         Usage: required
  74         Value type: <string-array>
  75         Definition: List of gpio pins affected by the properties specified in
  76                     this subnode.  Valid pins are:
  77                     gpio0-gpio151,
  78                     sdc1_clk,
  79                     sdc1_cmd,
  80                     sdc1_data
  81                     sdc3_clk,
  82                     sdc3_cmd,
  83                     sdc3_data
  84
  85 - function:
  86         Usage: required
  87         Value type: <string>
  88         Definition: Specify the alternative function to be configured for the
  89                     specified pins. Functions are only valid for gpio pins.
  90                     Valid values are:
  91                     audio_pcm, bt, cam_mclk0, cam_mclk1, cam_mclk2,
  92                     codec_mic_i2s, codec_spkr_i2s, ext_gps, fm, gps_blanking,
  93                     gps_pps_in, gps_pps_out, gp_clk_0a, gp_clk_0b, gp_clk_1a,
  94                     gp_clk_1b, gp_clk_2a, gp_clk_2b, gp_mn, gp_pdm_0a,
  95                     gp_pdm_0b, gp_pdm_1a, gp_pdm_1b, gp_pdm_2a, gp_pdm_2b, gpio,
  96                     gsbi1, gsbi1_spi_cs1_n, gsbi1_spi_cs2a_n, gsbi1_spi_cs2b_n,
  97                     gsbi1_spi_cs3_n, gsbi2, gsbi2_spi_cs1_n, gsbi2_spi_cs2_n,
  98                     gsbi2_spi_cs3_n, gsbi3, gsbi4, gsbi4_3d_cam_i2c_l,
  99                     gsbi4_3d_cam_i2c_r, gsbi5, gsbi5_3d_cam_i2c_l,
 100                     gsbi5_3d_cam_i2c_r, gsbi6, gsbi7, gsbi8, gsbi9, gsbi10,
 101                     gsbi11, gsbi11_spi_cs1a_n, gsbi11_spi_cs1b_n,
 102                     gsbi11_spi_cs2a_n, gsbi11_spi_cs2b_n, gsbi11_spi_cs3_n,
 103                     gsbi12, hdmi_cec, hdmi_ddc_clock, hdmi_ddc_data,
 104                     hdmi_hot_plug_detect, hsic, mdp_vsync, mi2s, mic_i2s,
 105                     pmb_clk, pmb_ext_ctrl, ps_hold, rpm_wdog, sdc2, sdc4, sdc5,
 106                     slimbus1, slimbus2, spkr_i2s, ssbi1, ssbi2, ssbi_ext_gps,
 107                     ssbi_pmic2, ssbi_qpa1, ssbi_ts, tsif1, tsif2, ts_eoc,
 108                     usb_fs1, usb_fs1_oe, usb_fs1_oe_n, usb_fs2, usb_fs2_oe,
 109                     usb_fs2_oe_n, vfe_camif_timer1_a, vfe_camif_timer1_b,
 110                     vfe_camif_timer2, vfe_camif_timer3_a, vfe_camif_timer3_b,
 111                     vfe_camif_timer4_a, vfe_camif_timer4_b, vfe_camif_timer4_c,
 112                     vfe_camif_timer5_a, vfe_camif_timer5_b, vfe_camif_timer6_a,
 113                     vfe_camif_timer6_b, vfe_camif_timer6_c, vfe_camif_timer7_a,
 114                     vfe_camif_timer7_b, vfe_camif_timer7_c, wlan
 115
 116 - bias-disable:
 117         Usage: optional
 118         Value type: <none>
 119         Definition: The specified pins should be configued as no pull.
 120
 121 - bias-pull-down:
 122         Usage: optional
 123         Value type: <none>
 124         Definition: The specified pins should be configued as pull down.
 125
 126 - bias-pull-up:
 127         Usage: optional
 128         Value type: <none>
 129         Definition: The specified pins should be configued as pull up.
 130
 131 - output-high:
 132         Usage: optional
 133         Value type: <none>
 134         Definition: The specified pins are configured in output mode, driven
 135                     high.
 136                     Not valid for sdc pins.
 137
 138 - output-low:
 139         Usage: optional
 140         Value type: <none>
 141         Definition: The specified pins are configured in output mode, driven
 142                     low.
 143                     Not valid for sdc pins.
 144
 145 - drive-strength:
 146         Usage: optional
 147         Value type: <u32>
 148         Definition: Selects the drive strength for the specified pins, in mA.
 149                     Valid values are: 2, 4, 6, 8, 10, 12, 14 and 16
 150
 151 Example:
 152
 153         msmgpio: pinctrl@800000 {
 154                 compatible = "qcom,msm8960-pinctrl";
 155                 reg = <0x800000 0x4000>;
 156
 157                 gpio-controller;
 158                 #gpio-cells = <2>;
 159                 interrupt-controller;
 160                 #interrupt-cells = <2>;
 161                 interrupts = <0 16 0x4>;
 162
 163                 gsbi8_uart: gsbi8-uart {
 164                         mux {
 165                                 pins = "gpio34", "gpio35";
 166                                 function = "gsbi8";
 167                         };
 168
 169                         tx {
 170                                 pins = "gpio34";
 171                                 drive-strength = <4>;
 172                                 bias-disable;
 173                         };
 174
 175                         rx {
 176                                 pins = "gpio35";
 177                                 drive-strength = <2>;
 178                                 bias-pull-up;
 179                         };
 180                 };
 181         };