Intel x86 PINCTRL/GPIO controller
Pin-muxing on broadwell devices can be described with a node for the PINCTRL
master node and a set of child nodes for each required pin state on the SoC.
These pin states use phandles and are referred to but a configuration section
which lists all pins in the device.
The PINCTRL master node requires the following properties:
- compatible : "intel,x86-broadwell-pinctrl"
Pin state nodes must be sub-nodes of the pinctrl master node. The must have
a phandle. They can contain the following optional properties:
- mode-gpio - forces the pin into GPIO mode
- output-value - sets the default output value of the GPIO, 0 (low, default)
or 1 (high)
- direction - sets the direction of the gpio, either PIN_INPUT (default)
or PIN_OUTPUT
- invert - the input pin is inverted
- trigger - sets the trigger type, either TRIGGER_EDGE (default) or
TRIGGER_LEVEL
- sense-disable - the input state sense is disabled
- owner 0 sets the owner of the pin, either OWNER_ACPI (default) or
ONWER_GPIO
- route - sets whether the pin is routed, either PIRQ_APIC_MASK or
PIRQ_APIC_ROUTE
- irq-enable - the interrupt is enabled
- reset-rsmrst - the pin will only be reset by RSMRST
- pirq-apic - the pin will be routed to the IOxAPIC
The first pin state will be the default, so pins without a configuration will
use that.
The pin configuration node is also a sub-node of the pinctrl master node, but
does not have a phandle. It has a single property:
- config - configuration to use for each pin. Each entry has of 3 cells:
- GPIO number (0..94)
- phandle of configuration (above)
- interrupt number (0..15)
There should be one entry for each pin (i.e. 95 entries).
But missing pins will receive the default configuration.
Example:
pch_pinctrl {
compatible = "intel,x86-broadwell-pinctrl";
/* Put this first: it is the default */
gpio_unused: gpio-unused {
mode-gpio;
direction = <PIN_INPUT>;
owner = <OWNER_GPIO>;
sense-disable;
};
gpio_acpi_sci: acpi-sci {
mode-gpio;
direction = <PIN_INPUT>;
invert;
route = <ROUTE_SCI>;
};
gpio_acpi_smi: acpi-smi {
mode-gpio;
direction = <PIN_INPUT>;
invert;
route = <ROUTE_SMI>;
};
gpio_input: gpio-input {
mode-gpio;
direction = <PIN_INPUT>;
owner = <OWNER_GPIO>;
};
gpio_input_invert: gpio-input-invert {
mode-gpio;
direction = <PIN_INPUT>;
owner = <OWNER_GPIO>;
invert;
};
gpio_native: gpio-native {
};
gpio_out_high: gpio-out-high {
mode-gpio;
direction = <PIN_OUTPUT>;
output-value = <1>;
owner = <OWNER_GPIO>;
sense-disable;
};
gpio_out_low: gpio-out-low {
mode-gpio;
direction = <PIN_OUTPUT>;
output-value = <0>;
owner = <OWNER_GPIO>;
sense-disable;
};
gpio_pirq: gpio-pirq {
mode-gpio;
direction = <PIN_INPUT>;
owner = <OWNER_GPIO>;
pirq-apic = <PIRQ_APIC_ROUTE>;
};
soc_gpio@0 {
config =
<0 &gpio_unused 0>, /* unused */
<1 &gpio_unused 0>, /* unused */
<2 &gpio_unused 0>, /* unused */
<3 &gpio_unused 0>, /* unused */
<4 &gpio_native 0>, /* native: i2c0_sda_gpio4 */
<5 &gpio_native 0>, /* native: i2c0_scl_gpio5 */
<6 &gpio_native 0>, /* native: i2c1_sda_gpio6 */
<7 &gpio_native 0>, /* native: i2c1_scl_gpio7 */
<8 &gpio_acpi_sci 0>, /* pch_lte_wake_l */
<9 &gpio_input_invert 0>,/* trackpad_int_l (wake) */
<10 &gpio_acpi_sci 0>, /* pch_wlan_wake_l */
<11 &gpio_unused 0>, /* unused */
<12 &gpio_unused 0>, /* unused */
<13 &gpio_pirq 3>, /* trackpad_int_l (pirql) */
<14 &gpio_pirq 4>, /* touch_int_l (pirqm) */
<15 &gpio_unused 0>, /* unused (strap) */
<16 &gpio_input 0>, /* pch_wp */
<17 &gpio_unused 0>, /* unused */
<18 &gpio_unused 0>, /* unused */
<19 &gpio_unused 0>, /* unused */
<20 &gpio_native 0>, /* pcie_wlan_clkreq_l */
<21 &gpio_out_high 0>, /* pp3300_ssd_en */
<22 &gpio_unused 0>, /* unused */
<23 &gpio_out_low 0>, /* pp3300_autobahn_en */
<24 &gpio_unused 0>, /* unused */
<25 &gpio_input 0>, /* ec_in_rw */
<26 &gpio_unused 0>, /* unused */
<27 &gpio_acpi_sci 0>, /* pch_wake_l */
<28 &gpio_unused 0>, /* unused */
<29 &gpio_unused 0>, /* unused */
<30 &gpio_native 0>, /* native: pch_suswarn_l */
<31 &gpio_native 0>, /* native: acok_buf */
<32 &gpio_native 0>, /* native: lpc_clkrun_l */
<33 &gpio_native 0>, /* native: ssd_devslp */
<34 &gpio_acpi_smi 0>, /* ec_smi_l */
<35 &gpio_acpi_smi 0>, /* pch_nmi_dbg_l (route in
nmi_en) */
<36 &gpio_acpi_sci 0>, /* ec_sci_l */
<37 &gpio_unused 0>, /* unused */
<38 &gpio_unused 0>, /* unused */
<39 &gpio_unused 0>, /* unused */
<40 &gpio_native 0>, /* native: pch_usb1_oc_l */
<41 &gpio_native 0>, /* native: pch_usb2_oc_l */
<42 &gpio_unused 0>, /* wlan_disable_l */
<43 &gpio_out_high 0>, /* pp1800_codec_en */
<44 &gpio_unused 0>, /* unused */
<45 &gpio_acpi_sci 0>, /* dsp_int - codec wake */
<46 &gpio_pirq 6>, /* hotword_det_l_3v3 (pirqo) -
codec irq */
<47 &gpio_out_low 0>, /* ssd_reset_l */
<48 &gpio_unused 0>, /* unused */
<49 &gpio_unused 0>, /* unused */
<50 &gpio_unused 0>, /* unused */
<51 &gpio_unused 0>, /* unused */
<52 &gpio_input 0>, /* sim_det */
<53 &gpio_unused 0>, /* unused */
<54 &gpio_unused 0>, /* unused */
<55 &gpio_unused 0>, /* unused */
<56 &gpio_unused 0>, /* unused */
<57 &gpio_out_high 0>, /* codec_reset_l */
<58 &gpio_unused 0>, /* unused */
<59 &gpio_out_high 0>, /* lte_disable_l */
<60 &gpio_unused 0>, /* unused */
<61 &gpio_native 0>, /* native: pch_sus_stat */
<62 &gpio_native 0>, /* native: pch_susclk */
<63 &gpio_native 0>, /* native: pch_slp_s5_l */
<64 &gpio_unused 0>, /* unused */
<65 &gpio_input 0>, /* ram_id3 */
<66 &gpio_input 0>, /* ram_id3_old (strap) */
<67 &gpio_input 0>, /* ram_id0 */
<68 &gpio_input 0>, /* ram_id1 */
<69 &gpio_input 0>, /* ram_id2 */
<70 &gpio_unused 0>, /* unused */
<71 &gpio_native 0>, /* native: modphy_en */
<72 &gpio_unused 0>, /* unused */
<73 &gpio_unused 0>, /* unused */
<74 &gpio_unused 0>, /* unused */
<75 &gpio_unused 0>, /* unused */
<76 &gpio_unused 0>, /* unused */
<77 &gpio_unused 0>, /* unused */
<78 &gpio_unused 0>, /* unused */
<79 &gpio_unused 0>, /* unused */
<80 &gpio_unused 0>, /* unused */
<81 &gpio_unused 0>, /* unused */
<82 &gpio_native 0>, /* native: ec_rcin_l */
<83 &gpio_native 0>, /* gspi0_cs */
<84 &gpio_native 0>, /* gspi0_clk */
<85 &gpio_native 0>, /* gspi0_miso */
<86 &gpio_native 0>, /* gspi0_mosi (strap) */
<87 &gpio_unused 0>, /* unused */
<88 &gpio_unused 0>, /* unused */
<89 &gpio_out_high 0>, /* pp3300_sd_en */
<90 &gpio_unused 0>, /* unused */
<91 &gpio_unused 0>, /* unused */
<92 &gpio_unused 0>, /* unused */
<93 &gpio_unused 0>, /* unused */
<94 &gpio_unused 0 >; /* unused */
};
};