Re: [PATCH v4 1/8] dt-bindings: mfd: document stpmic1

Lee Jones
2018-10-25T09:44:38Z

Rob: please grep your name for some feedback.

On Thu, 18 Oct 2018, Pascal PAILLET-LME wrote:

> From: pascal paillet <p.paillet@st.com>

Please use `git send-email` to send patches.

Please capitalise your name: Pascal Paillet

> stpmic1 is a pmic from STMicroelectronics. The STPMIC1 integrates 10

"STPMIC1"
"PMIC"

> regulators , 3 switches, a watchdog and an input for a power on key.

Whitespace.

What is a switch?

> Signed-off-by: pascal paillet <p.paillet@st.com>
> ---
> changes in v4:
> * remove interrupt-parent description
> * pmic1@33 renamed to pmic@33
> * fix indentation
>
> .../devicetree/bindings/mfd/st,stpmic1.txt | 131 +++++++++++++++++++++
> include/dt-bindings/mfd/st,stpmic1.h | 46 ++++++++
> 2 files changed, 177 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/mfd/st,stpmic1.txt
> create mode 100644 include/dt-bindings/mfd/st,stpmic1.h
>
> diff --git a/Documentation/devicetree/bindings/mfd/st,stpmic1.txt b/Documentation/devicetree/bindings/mfd/st,stpmic1.txt
> new file mode 100644
> index 0000000..bb19cc8
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/mfd/st,stpmic1.txt
> @@ -0,0 +1,131 @@
> +* STMicroelectronics STPMIC1 Power Management IC
> +
> +Required parent device properties:
> +- compatible: "st,stpmic1"
> +- reg: The I2C slave address for the STPMIC1 chip.
> +- interrupts: The interrupt line the device is connected to.
> +- #interrupt-cells: Should be 1.
> +- interrupt-controller: Describes the STPMIC1 as an interrupt

Tabbing (this could just be a patch quirk).

Either use full-stops or don't - please be consistent.

> + controller (has its own domain). Interrupt number are the following:

"numbers"

Actually consider rewording - sounds funny.

> + /* Interrupt Register 1 (0x50 for latch) */
> + IT_SWOUT_R=0
> + IT_SWOUT_F=1
> + IT_VBUS_OTG_R=2
> + IT_VBUS_OTG_F=3
> + IT_WAKEUP_R=4
> + IT_WAKEUP_F=5
> + IT_PONKEY_R=6
> + IT_PONKEY_F=7
> + /* Interrupt Register 2 (0x51 for latch) */
> + IT_OVP_BOOST=8
> + IT_OCP_BOOST=9
> + IT_OCP_SWOUT=10
> + IT_OCP_OTG=11
> + IT_CURLIM_BUCK4=12
> + IT_CURLIM_BUCK3=13
> + IT_CURLIM_BUCK2=14
> + IT_CURLIM_BUCK1=15
> + /* Interrupt Register 3 (0x52 for latch) */
> + IT_SHORT_SWOUT=16
> + IT_SHORT_SWOTG=17
> + IT_CURLIM_LDO6=18
> + IT_CURLIM_LDO5=19
> + IT_CURLIM_LDO4=20
> + IT_CURLIM_LDO3=21
> + IT_CURLIM_LDO2=22
> + IT_CURLIM_LDO1=23
> + /* Interrupt Register 3 (0x52 for latch) */
> + IT_SWIN_R=24
> + IT_SWIN_F=25
> + IT_RESERVED_1=26
> + IT_RESERVED_2=27
> + IT_VINLOW_R=28
> + IT_VINLOW_F=29
> + IT_TWARN_R=30
> + IT_TWARN_F=31

Do you really need these in here? I suspect not.

> +Optional parent device properties:
> +- st,main-control-register:
> + -bit 1: Power cycling will be performed on turn OFF condition
> + -bit 2: PWRCTRL is functional
> + -bit 3: PWRCTRL active high
> +- st,pads-pull-register:
> + -bit 1: WAKEUP pull down is not active
> + -bit 2: PWRCTRL pull up is active
> + -bit 3: PWRCTRL pull down is active
> + -bit 4: WAKEUP detector is disabled
> +- st,vin-control-register:
> + -bit 0: VINLOW monitoring is enabled
> + -bit [1...3]: VINLOW rising threshold
> + 000 VINOK_f + 50mV
> + 001 VINOK_f + 100mV
> + 010 VINOK_f + 150mV
> + 011 VINOK_f + 200mV
> + 100 VINOK_f + 250mV
> + 101 VINOK_f + 300mV
> + 110 VINOK_f + 350mV
> + 111 VINOK_f + 400mV
> + -bit [4...5]: VINLOW hyst
> + 00 100mV
> + 01 200mV
> + 10 300mV
> + 11 400mV
> + -bit 6: SW_OUT detector is disabled
> + -bit 7: SW_IN detector is enabled.
> +- st,usb-control-register:
> + -bit 3: SW_OUT current limit
> + 0: 600mA
> + 1: 1.1A
> + -bit 4: VBUS_OTG discharge is enabled
> + -bit 5: SW_OUT discharge is enabled
> + -bit 6: VBUS_OTG detection is enabled
> + -bit 7: BOOST_OVP is disabled

I'm surprised Rob allowed you to add register bits in a DT property?

> +STPMIC1 consists in a varied group of sub-devices.
> +Each sub-device binding is be described in own documentation file.
> +
> +Device Description
> +------ ------------
> +st,stpmic1-onkey : Power on key, see ../input/st,stpmic1-onkey.txt
> +st,stpmic1-regulators : Regulators, see ../regulator/st,stpmic1-regulator.txt
> +st,stpmic1-wdt : Watchdog, see ../watchdog/st,stpmic1-wdt.txt
> +
> +Example:
> +
> +pmic: pmic@33 {
> + compatible = "st,stpmic1";
> + reg = <0x33>;
> + interrupt-parent = <&gpioa>;
> + interrupts = <0 2>;
> + st,main-control-register=<0x0c>;
> + interrupt-controller;
> + #interrupt-cells = <2>;
> +
> + onkey {
> + compatible = "st,stpmic1-onkey";
> + interrupts = <IT_PONKEY_F 0>,<IT_PONKEY_R 1>;
> + interrupt-names = "onkey-falling", "onkey-rising";
> + power-off-time-sec = <10>;
> + };
> +
> + watchdog {
> + compatible = "st,stpmic1-wdt";
> + };
> +
> + regulators {
> + compatible = "st,stpmic1-regulators";
> +
> + vdd_core: buck1 {
> + regulator-name = "vdd_core";
> + regulator-boot-on;
> + regulator-min-microvolt = <700000>;
> + regulator-max-microvolt = <1200000>;
> + };
> + vdd: buck3 {
> + regulator-name = "vdd";
> + regulator-min-microvolt = <3300000>;
> + regulator-max-microvolt = <3300000>;
> + regulator-boot-on;
> + regulator-pull-down;
> + };
> + };
> diff --git a/include/dt-bindings/mfd/st,stpmic1.h b/include/dt-bindings/mfd/st,stpmic1.h
> new file mode 100644
> index 0000000..b2d6c83
> --- /dev/null
> +++ b/include/dt-bindings/mfd/st,stpmic1.h
> @@ -0,0 +1,46 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +/*
> + * Copyright (C) STMicroelectronics 2018 - All Rights Reserved
> + * Author: Philippe Peurichard <philippe.peurichard@st.com>,
> + * Pascal Paillet <p.paillet@st.com> for STMicroelectronics.
> + */
> +
> +#ifndef __DT_BINDINGS_STPMIC1_H__
> +#define __DT_BINDINGS_STPMIC1_H__
> +
> +/* IRQ definitions */
> +#define IT_PONKEY_F 0
> +#define IT_PONKEY_R 1
> +#define IT_WAKEUP_F 2
> +#define IT_WAKEUP_R 3
> +#define IT_VBUS_OTG_F 4
> +#define IT_VBUS_OTG_R 5
> +#define IT_SWOUT_F 6
> +#define IT_SWOUT_R 7
> +
> +#define IT_CURLIM_BUCK1 8
> +#define IT_CURLIM_BUCK2 9
> +#define IT_CURLIM_BUCK3 10
> +#define IT_CURLIM_BUCK4 11
> +#define IT_OCP_OTG 12
> +#define IT_OCP_SWOUT 13
> +#define IT_OCP_BOOST 14
> +#define IT_OVP_BOOST 15
> +
> +#define IT_CURLIM_LDO1 16
> +#define IT_CURLIM_LDO2 17
> +#define IT_CURLIM_LDO3 18
> +#define IT_CURLIM_LDO4 19
> +#define IT_CURLIM_LDO5 20
> +#define IT_CURLIM_LDO6 21
> +#define IT_SHORT_SWOTG 22
> +#define IT_SHORT_SWOUT 23
> +
> +#define IT_TWARN_F 24
> +#define IT_TWARN_R 25
> +#define IT_VINLOW_F 26
> +#define IT_VINLOW_R 27
> +#define IT_SWIN_F 30
> +#define IT_SWIN_R 31
> +
> +#endif /* __DT_BINDINGS_STPMIC1_H__ */

--
Lee Jones [李琼斯]
Linaro Services Technical Lead
Linaro.org │ Open source software for ARM SoCs
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