linux-kernel - Re: [PATCHv2] phy: cpcap-usb: Add CPCAP PMIC USB support

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Message-ID: <20170329020424.2gbocl65dwrqgk4n@rob-hp-laptop>
Date:   Tue, 28 Mar 2017 21:04:24 -0500
From:   Rob Herring <robh@...nel.org>
To:     Tony Lindgren <tony@...mide.com>
Cc:     Kishon Vijay Abraham I <kishon@...com>,
        linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org,
        linux-omap@...r.kernel.org, devicetree@...r.kernel.org,
        Marcel Partap <mpartap@....net>,
        Michael Scott <michael.scott@...aro.org>
Subject: Re: [PATCHv2] phy: cpcap-usb: Add CPCAP PMIC USB support

On Wed, Mar 22, 2017 at 04:46:02PM -0700, Tony Lindgren wrote:
> Some Motorola phones like droid 4 use a custom CPCAP PMIC that has a
> multiplexing USB PHY.
> 
> This USB PHY can operate at least in four modes using pin multiplexing
> and two control GPIOS:
> 
> - Pass through companion PHY for the SoC USB PHY
> - ULPI PHY for the SoC
> - Pass through USB for the modem
> - UART debug console for the SoC
> 
> This patch adds support for droid 4 USB PHY and debug UART modes,
> support for other modes can be added later on as needed.
> 
> Both peripheral and host mode are working for the USB. The
> host mode depends on the cpcap-charger driver for VBUS.
> 
> VBUS and ID pin detection are done using cpcap-adc IIO ADC
> driver.
> 
> Cc: devicetree@...r.kernel.org
> Cc: Marcel Partap <mpartap@....net>
> Cc: Michael Scott <michael.scott@...aro.org>
> Tested-by: Sebastian Reichel <sre@...nel.org>
> Signed-off-by: Tony Lindgren <tony@...mide.com>
> ---
> 
> Changes since v1:
> 
> - Use iio_read_channel_processed() instead of iio_read_channel_scaled()
>   as changed in the v2 of the ADC driver 
> 
> - Keep Tested-by from Sebastian Reichel <sre@...nel.org> as the change
>   from v1 is trivial
> 
> ---
>  .../devicetree/bindings/phy/phy-cpcap-usb.txt      |  40 ++

Acked-by: Rob Herring <robh@...nel.org>

>  drivers/phy/Kconfig                                |   8 +
>  drivers/phy/Makefile                               |   1 +
>  drivers/phy/phy-cpcap-usb.c                        | 695 +++++++++++++++++++++
>  4 files changed, 744 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/phy/phy-cpcap-usb.txt
>  create mode 100644 drivers/phy/phy-cpcap-usb.c