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Message-ID: <YxaSBRkAG/hKjFol@google.com>
Date: Mon, 5 Sep 2022 17:19:17 -0700
From: Dmitry Torokhov <dmitry.torokhov@...il.com>
To: Thierry Reding <thierry.reding@...il.com>,
Mark Brown <broonie@...nel.org>,
Matti Vaittinen <mazziesaccount@...il.com>,
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Liam Girdwood <lgirdwood@...il.com>,
Wim Van Sebroeck <wim@...ux-watchdog.org>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Guenter Roeck <linux@...ck-us.net>,
Miquel Raynal <miquel.raynal@...tlin.com>,
Linus Walleij <linus.walleij@...aro.org>,
Felipe Balbi <balbi@...nel.org>,
Alexandre Belloni <alexandre.belloni@...tlin.com>,
Krzysztof Wilczyński <kw@...ux.com>,
Vignesh Raghavendra <vigneshr@...com>,
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Cc: linux-watchdog@...r.kernel.org, linux-usb@...r.kernel.org,
linux-gpio@...r.kernel.org, linux-pci@...r.kernel.org,
linux-tegra@...r.kernel.org, linux-mtd@...ts.infradead.org,
linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
linux-stm32@...md-mailman.stormreply.com,
linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v1 07/11] PCI: apple: switch to using
fwnode_gpiod_get_index()
On Sun, Sep 04, 2022 at 11:30:59PM -0700, Dmitry Torokhov wrote:
> I would like to stop exporting OF-specific gpiod_get_from_of_node()
> so that gpiolib can be cleaned a bit, so let's switch to the generic
> fwnode property API.
>
> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@...il.com>
>
> diff --git a/drivers/pci/controller/pcie-apple.c b/drivers/pci/controller/pcie-apple.c
> index a2c3c207a04b..d83817d3ff86 100644
> --- a/drivers/pci/controller/pcie-apple.c
> +++ b/drivers/pci/controller/pcie-apple.c
> @@ -516,8 +516,8 @@ static int apple_pcie_setup_port(struct apple_pcie *pcie,
> u32 stat, idx;
> int ret, i;
>
> - reset = gpiod_get_from_of_node(np, "reset-gpios", 0,
> - GPIOD_OUT_LOW, "PERST#");
> + reset = fwnode_gpiod_get_index(of_fwnode_handle(np),
> + "reset", 0, GPIOD_OUT_LOW, "PERST#");
Hmm, I am looking at the driver and it leaks the reset gpio on
unbind/unload. I guess it does not matter in practice, but still nice
not to leak. Thankfully it is easy to cure by switching to devm option:
devm_fwnode_gpiod_get().
I'll send and updated patch with a new justification.
Thanks.
--
Dmitry
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