Documentation: add missing documentation for tps65217-bl device tree binding
[platform/adaptation/renesas_rcar/renesas_kernel.git] / Documentation / devicetree / bindings / video / backlight / tps65217-backlight.txt
1 TPS65217 family of regulators
2
3 The TPS65217 chip contains a boost converter and current sinks which can be
4 used to drive LEDs for use as backlights.
5
6 Required properties:
7 - compatible: "ti,tps65217"
8 - reg: I2C slave address
9 - backlight: node for specifying WLED1 and WLED2 lines in TPS65217
10 - isel: selection bit, valid values: 1 for ISEL1 (low-level) and 2 for ISEL2 (high-level)
11 - fdim: PWM dimming frequency, valid values: 100, 200, 500, 1000
12
13 Each regulator is defined using the standard binding for regulators.
14
15 Example:
16
17         tps: tps@24 {
18                 reg = <0x24>;
19                 compatible = "ti,tps65217";
20                 backlight {
21                         isel = <1>;  /* 1 - ISET1, 2 ISET2 */
22                         fdim = <100>; /* TPS65217_BL_FDIM_100HZ */
23                 };
24         };