Lines Matching +full:i2c +full:- +full:scl +full:- +full:hz

1 Generic device tree bindings for I2C busses
4 This document describes generic bindings which can be used to describe I2C
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10 - #address-cells - should be <1>. Read more about addresses below.
11 - #size-cells - should be <0>.
12 - compatible - name of I2C bus controller
17 The cells properties above define that an address of children of an I2C bus
21 -----------------------------
26 - clock-frequency
27 frequency of bus clock in Hz.
29 - i2c-bus
30 For I2C adapters that have child nodes that are a mixture of both I2C
31 devices and non-I2C devices, the 'i2c-bus' subnode can be used for
32 populating I2C devices. If the 'i2c-bus' subnode is present, only
33 subnodes of this will be considered as I2C slaves. The properties,
34 '#address-cells' and '#size-cells' must be defined under this subnode
37 - i2c-scl-falling-time-ns
38 Number of nanoseconds the SCL signal takes to fall; t(f) in the I2C
41 - i2c-scl-internal-delay-ns
42 Number of nanoseconds the IP core additionally needs to setup SCL.
44 - i2c-scl-rising-time-ns
45 Number of nanoseconds the SCL signal takes to rise; t(r) in the I2C
48 - i2c-sda-falling-time-ns
49 Number of nanoseconds the SDA signal takes to fall; t(f) in the I2C
52 - i2c-analog-filter
53 Enable analog filter for i2c lines.
55 - i2c-digital-filter
56 Enable digital filter for i2c lines.
58 - i2c-digital-filter-width-ns
60 (i2c-digital-filter). This width is specified in nanoseconds.
62 - i2c-analog-filter-cutoff-frequency
63 Frequency that the analog filter (i2c-analog-filter) uses to distinguish
66 a low-pass analog filter). Typical value should be above the normal
67 i2c bus clock frequency (clock-frequency).
68 Specified in Hz.
70 - multi-master
73 all the time, for example. Can not be combined with 'single-master'.
75 - pinctrl
76 add extra pinctrl to configure SCL/SDA pins to GPIO function for bus
79 - scl-gpios
80 specify the gpio related to SCL pin. Used for GPIO bus recovery.
82 - sda-gpios
85 - single-master
88 Can not be combined with 'multi-master'.
90 - smbus
95 - smbus-alert
96 states that the optional SMBus-Alert feature apply to this bus.
98 - mctp-controller
100 MCTP over I2C transport.
103 --------------------------------------
105 - compatible
106 name of I2C slave device
108 - reg
109 One or many I2C slave addresses. These are usually a 7 bit addresses.
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123 - host-notify
126 - interrupts
129 - interrupt-names
130 "irq", "wakeup" and "smbus_alert" names are recognized by I2C core,
133 - reg-names
137 - wakeup-source
141 used by the device. I2C core will assign "irq" interrupt (or the very first
145 adapters that support this feature, may use "host-notify" property. I2C
149 Also, if device is marked as a wakeup source, I2C core will set up "wakeup"