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authorLaxman Dewangan <ldewangan@nvidia.com>2013-10-22 03:38:46 -0400
committerLee Jones <lee.jones@linaro.org>2013-10-23 11:22:33 -0400
commitd460a6f3d67a8558fb58299518077888b7dbf5f3 (patch)
treea6e2a066f43df97206dfa9faa1e4e5d9d425c98a
parent71c7f93ea0036eddb86ccd268945555419bb1cbb (diff)
mfd: Add support for ams AS3722 PMIC
The ams AS3722 is a compact system PMU suitable for mobile phones, tablets etc. It has 4 DC/DC step-down regulators, 3 DC/DC step-down controller, 11 LDOs, RTC, automatic battery, temperature and over-current monitoring, 8 GPIOs, ADC and a watchdog. Add MFD core driver for the AS3722 to support core functionality. Acked-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Signed-off-by: Florian Lobmaier <florian.lobmaier@ams.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
Diffstat
-rw-r--r--Documentation/devicetree/bindings/mfd/as3722.txt194
-rw-r--r--drivers/mfd/Kconfig12
-rw-r--r--drivers/mfd/Makefile1
-rw-r--r--drivers/mfd/as3722.c449
-rw-r--r--include/dt-bindings/mfd/as3722.h52
-rw-r--r--include/linux/mfd/as3722.h423
6 files changed, 1131 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/mfd/as3722.txt b/Documentation/devicetree/bindings/mfd/as3722.txt
new file mode 100644
index 000000000000..fc2191ecfd6b
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/as3722.txt
@@ -0,0 +1,194 @@
1* ams AS3722 Power management IC.
2
3Required properties:
4-------------------
5- compatible: Must be "ams,as3722".
6- reg: I2C device address.
7- interrupt-controller: AS3722 has internal interrupt controller which takes the
8 interrupt request from internal sub-blocks like RTC, regulators, GPIOs as well
9 as external input.
10- #interrupt-cells: Should be set to 2 for IRQ number and flags.
11 The first cell is the IRQ number. IRQ numbers for different interrupt source
12 of AS3722 are defined at dt-bindings/mfd/as3722.h
13 The second cell is the flags, encoded as the trigger masks from binding document
14 interrupts.txt, using dt-bindings/irq.
15
16Optional submodule and their properties:
17=======================================
18
19Pinmux and GPIO:
20===============
21Device has 8 GPIO pins which can be configured as GPIO as well as the special IO
22functions.
23
24Please refer to pinctrl-bindings.txt in this directory for details of the
25common pinctrl bindings used by client devices, including the meaning of the
26phrase "pin configuration node".
27
28Following are properties which is needed if GPIO and pinmux functionality
29is required:
30 Required properties:
31 -------------------
32 - gpio-controller: Marks the device node as a GPIO controller.
33 - #gpio-cells: Number of GPIO cells. Refer to binding document
34 gpio/gpio.txt
35
36 Optional properties:
37 --------------------
38 Following properties are require if pin control setting is required
39 at boot.
40 - pinctrl-names: A pinctrl state named "default" be defined, using the
41 bindings in pinctrl/pinctrl-binding.txt.
42 - pinctrl[0...n]: Properties to contain the phandle that refer to
43 different nodes of pin control settings. These nodes represents
44 the pin control setting of state 0 to state n. Each of these
45 nodes contains different subnodes to represents some desired
46 configuration for a list of pins. This configuration can
47 include the mux function to select on those pin(s), and
48 various pin configuration parameters, such as pull-up,
49 open drain.
50
51 Each subnode have following properties:
52 Required properties:
53 - pins: List of pins. Valid values of pins properties are:
54 gpio0, gpio1, gpio2, gpio3, gpio4, gpio5,
55 gpio6, gpio7
56
57 Optional properties:
58 function, bias-disable, bias-pull-up, bias-pull-down,
59 bias-high-impedance, drive-open-drain.
60
61 Valid values for function properties are:
62 gpio, interrupt-out, gpio-in-interrupt,
63 vsup-vbat-low-undebounce-out,
64 vsup-vbat-low-debounce-out,
65 voltage-in-standby, oc-pg-sd0, oc-pg-sd6,
66 powergood-out, pwm-in, pwm-out, clk32k-out,
67 watchdog-in, soft-reset-in
68
69Regulators:
70===========
71Device has multiple DCDC and LDOs. The node "regulators" is require if regulator
72functionality is needed.
73
74Following are properties of regulator subnode.
75
76 Optional properties:
77 -------------------
78 The input supply of regulators are the optional properties on the
79 regulator node. The input supply of these regulators are provided
80 through following properties:
81 vsup-sd2-supply: Input supply for SD2.
82 vsup-sd3-supply: Input supply for SD3.
83 vsup-sd4-supply: Input supply for SD4.
84 vsup-sd5-supply: Input supply for SD5.
85 vin-ldo0-supply: Input supply for LDO0.
86 vin-ldo1-6-supply: Input supply for LDO1 and LDO6.
87 vin-ldo2-5-7-supply: Input supply for LDO2, LDO5 and LDO7.
88 vin-ldo3-4-supply: Input supply for LDO3 and LDO4.
89 vin-ldo9-10-supply: Input supply for LDO9 and LDO10.
90 vin-ldo11-supply: Input supply for LDO11.
91
92 Optional sub nodes for regulators:
93 ---------------------------------
94 The subnodes name is the name of regulator and it must be one of:
95 sd[0-6], ldo[0-7], ldo[9-11]
96
97 Each sub-node should contain the constraints and initialization
98 information for that regulator. See regulator.txt for a description
99 of standard properties for these sub-nodes.
100 Additional optional custom properties are listed below.
101 ams,ext-control: External control of the rail. The option of
102 this properties will tell which external input is
103 controlling this rail. Valid values are 0, 1, 2 ad 3.
104 0: There is no external control of this rail.
105 1: Rail is controlled by ENABLE1 input pin.
106 2: Rail is controlled by ENABLE2 input pin.
107 3: Rail is controlled by ENABLE3 input pin.
108 Missing this property on DT will be assume as no
109 external control. The external control pin macros
110 are defined @dt-bindings/mfd/as3722.h
111
112 ams,enable-tracking: Enable tracking with SD1, only supported
113 by LDO3.
114
115Example:
116--------
117#include <dt-bindings/mfd/as3722.h>
118...
119ams3722 {
120 compatible = "ams,as3722";
121 reg = <0x48>;
122
123 interrupt-parent = <&intc>;
124 interrupt-controller;
125 #interrupt-cells = <2>;
126
127 gpio-controller;
128 #gpio-cells = <2>;
129
130 pinctrl-names = "default";
131 pinctrl-0 = <&as3722_default>;
132
133 as3722_default: pinmux {
134 gpio0 {
135 pins = "gpio0";
136 function = "gpio";
137 bias-pull-down;
138 };
139
140 gpio1_2_4_7 {
141 pins = "gpio1", "gpio2", "gpio4", "gpio7";
142 function = "gpio";
143 bias-pull-up;
144 };
145
146 gpio5 {
147 pins = "gpio5";
148 function = "clk32k_out";
149 };
150 }
151
152 regulators {
153 vsup-sd2-supply = <...>;
154 ...
155
156 sd0 {
157 regulator-name = "vdd_cpu";
158 regulator-min-microvolt = <700000>;
159 regulator-max-microvolt = <1400000>;
160 regulator-always-on;
161 ams,ext-control = <2>;
162 };
163
164 sd1 {
165 regulator-name = "vdd_core";
166 regulator-min-microvolt = <700000>;
167 regulator-max-microvolt = <1400000>;
168 regulator-always-on;
169 ams,ext-control = <1>;