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Tue, 28 Apr 2020 09:50:42 -0400 (EDT) Date: Tue, 28 Apr 2020 15:50:41 +0200 From: Maxime Ripard To: Nicolas Saenz Julienne Subject: Re: [PATCH v2 04/91] firmware: rpi: Only create clocks device if we don't have a node for it Message-ID: <20200428135041.zg5h454fkc5wgxp3@gilmour.lan> References: <4842d1b72192bb7c461a2d50c8798f178da964e0.camel@suse.de> MIME-Version: 1.0 In-Reply-To: <4842d1b72192bb7c461a2d50c8798f178da964e0.camel@suse.de> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200428_065050_486661_C13245B0 X-CRM114-Status: GOOD ( 21.55 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Tim Gover , Dave Stevenson , linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, Eric Anholt , bcm-kernel-feedback-list@broadcom.com, linux-rpi-kernel@lists.infradead.org, Phil Elwell , linux-arm-kernel@lists.infradead.org Content-Type: multipart/mixed; boundary="===============5825874609926835580==" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org --===============5825874609926835580== Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="tdisr6odiqdkp6jx" Content-Disposition: inline --tdisr6odiqdkp6jx Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Hi Nicolas, On Mon, Apr 27, 2020 at 01:24:14PM +0200, Nicolas Saenz Julienne wrote: > Hi Maxime, >=20 > On Fri, 2020-04-24 at 17:33 +0200, Maxime Ripard wrote: > > The firmware clocks driver was previously probed through a platform_dev= ice > > created by the firmware driver. > >=20 > > Since we will now have a node for that clocks driver, we need to create= the > > device only in the case where there's no node for it already. > >=20 > > Signed-off-by: Maxime Ripard > > --- > > drivers/firmware/raspberrypi.c | 17 +++++++++++++++-- > > 1 file changed, 15 insertions(+), 2 deletions(-) > >=20 > > diff --git a/drivers/firmware/raspberrypi.c b/drivers/firmware/raspberr= ypi.c > > index da26a584dca0..1874f41b007c 100644 > > --- a/drivers/firmware/raspberrypi.c > > +++ b/drivers/firmware/raspberrypi.c > > @@ -210,6 +210,15 @@ rpi_register_hwmon_driver(struct device *dev, stru= ct > > rpi_firmware *fw) > > =20 > > static void rpi_register_clk_driver(struct device *dev) > > { > > + /* > > + * Earlier DTs don't have a node for the firmware clocks but > > + * rely on us creating a platform device by hand. If we do > > + * have a node for the firmware clocks, just bail out here. > > + */ > > + if (of_get_compatible_child(dev->of_node, > > + "raspberrypi,firmware-clocks")) > > + return; > > + > > rpi_clk =3D platform_device_register_data(dev, "raspberrypi-clk", > > -1, NULL, 0); > > } > > @@ -262,8 +271,12 @@ static int rpi_firmware_remove(struct platform_dev= ice > > *pdev) > > =20 > > platform_device_unregister(rpi_hwmon); > > rpi_hwmon =3D NULL; > > - platform_device_unregister(rpi_clk); > > - rpi_clk =3D NULL; > > + > > + if (rpi_clk) { >=20 > rpi_clk, being a static global variable, will be zeroed by default. So, i= f you > don't register the platform device, rpi_clk is going to be NULL, which yo= u're > allowed to feed platform_device_unregister(), so no need to be extra care= ful. Indeed, I'll fix that up. Thanks! Maxime --tdisr6odiqdkp6jx Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iHUEABYIAB0WIQRcEzekXsqa64kGDp7j7w1vZxhRxQUCXqg0sQAKCRDj7w1vZxhR xbQ1AP9u2PkigXhbvMvsCOEqNwJ8D7x0AE8RyRBsAh+1uyg8kgEApwI7mCx3Oyv0 OKLPLIDceoiTcYK3Qs3FCOaUJ+9WKgs= =W0Du -----END PGP SIGNATURE----- --tdisr6odiqdkp6jx-- --===============5825874609926835580== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel --===============5825874609926835580==--