linux-kernel - Re: [PATCH v9 06/10] serial: sc16is7xx: fix regression with GPIO configuration

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Message-ID: <2023073105-elevation-canister-2777@gregkh>
Date:   Mon, 31 Jul 2023 17:58:41 +0200
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Hugo Villeneuve <hugo@...ovil.com>
Cc:     robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        conor+dt@...nel.org, jirislaby@...nel.org, jringle@...dpoint.com,
        isaac.true@...onical.com, jesse.sung@...onical.com,
        l.perczak@...lintechnologies.com, tomasz.mon@...lingroup.com,
        linux-serial@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-gpio@...r.kernel.org,
        Hugo Villeneuve <hvilleneuve@...onoff.com>,
        stable@...r.kernel.org,
        Andy Shevchenko <andy.shevchenko@...il.com>,
        Lech Perczak <lech.perczak@...lingroup.com>
Subject: Re: [PATCH v9 06/10] serial: sc16is7xx: fix regression with GPIO
 configuration

On Tue, Jul 25, 2023 at 10:23:38AM -0400, Hugo Villeneuve wrote:
> From: Hugo Villeneuve <hvilleneuve@...onoff.com>
> 
> Commit 679875d1d880 ("sc16is7xx: Separate GPIOs from modem control lines")
> and commit 21144bab4f11 ("sc16is7xx: Handle modem status lines")
> changed the function of the GPIOs pins to act as modem control
> lines without any possibility of selecting GPIO function.
> 
> As a consequence, applications that depends on GPIO lines configured
> by default as GPIO pins no longer work as expected.
> 
> Also, the change to select modem control lines function was done only
> for channel A of dual UART variants (752/762). This was not documented
> in the log message.
> 
> Allow to specify GPIO or modem control line function in the device
> tree, and for each of the ports (A or B).
> 
> Do so by using the new device-tree property named
> "nxp,modem-control-line-ports" (property added in separate patch).
> 
> When registering GPIO chip controller, mask-out GPIO pins declared as
> modem control lines according to this new DT property.
> 
> Fixes: 679875d1d880 ("sc16is7xx: Separate GPIOs from modem control lines")
> Fixes: 21144bab4f11 ("sc16is7xx: Handle modem status lines")
> Cc: <stable@...r.kernel.org> # 6.1.x: 95982fad dt-bindings: sc16is7xx: Add property to change GPIO function
> Cc: <stable@...r.kernel.org> # 6.1.x: 1584d572 serial: sc16is7xx: refactor GPIO controller registration
> Cc: <stable@...r.kernel.org> # 6.1.x: ac2caa5a serial: sc16is7xx: remove obsolete out_thread label
> Cc: <stable@...r.kernel.org> # 6.1.x: d90961ad serial: sc16is7xx: mark IOCONTROL register as volatile
> Cc: <stable@...r.kernel.org> # 6.1.x: 6dae3bad serial: sc16is7xx: fix broken port 0 uart init

Where are these git commit ids from?  I don't see them in Linus's tree,
how are they supposed to be picked up by the stable developers if they
are not valid ones?

confused,

greg k-h