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bh=J3JWSJwRY1VsrcUPrD3u272/QamxSCbn9RXueEbf4uk=; b=vLZj6OVlT0vaDqMOUz9UOOOWDbOOw5HJF9006hPb4dBLeTin5Fn0EoR0j9hCV+th7bINCG x2SzpjlBZNM77VAM9gK6adOpSnxf77jHZyZHz5oa4Sb98N+19/xZAEmNJxD8Us33JvNodB dxL8Jo2mIWf3mrcCiyhaMnD0AjugxjQ= From: Michael Walle To: linux-gpio@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-hwmon@vger.kernel.org, linux-pwm@vger.kernel.org, linux-watchdog@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH 03/18] mfd: mfd-core: match device tree node against reg property Date: Tue, 17 Mar 2020 21:50:02 +0100 Message-Id: <20200317205017.28280-4-michael@walle.cc> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200317205017.28280-1-michael@walle.cc> References: <20200317205017.28280-1-michael@walle.cc> MIME-Version: 1.0 X-Spamd-Bar: ++++++ X-Spam-Level: ****** X-Rspamd-Server: web X-Spam-Status: Yes, score=6.40 X-Spam-Score: 6.40 X-Rspamd-Queue-Id: 0A64E23E4F X-Spamd-Result: default: False [6.40 / 15.00]; FROM_HAS_DN(0.00)[]; TO_DN_SOME(0.00)[]; R_MISSING_CHARSET(2.50)[]; FREEMAIL_ENVRCPT(0.00)[gmail.com]; TAGGED_RCPT(0.00)[dt]; MIME_GOOD(-0.10)[text/plain]; BROKEN_CONTENT_TYPE(1.50)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; NEURAL_SPAM(0.00)[0.542]; DKIM_SIGNED(0.00)[]; RCPT_COUNT_TWELVE(0.00)[22]; MID_CONTAINS_FROM(1.00)[]; RCVD_COUNT_ZERO(0.00)[0]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; ASN(0.00)[asn:31334, ipnet:2a02:810c:8000::/33, country:DE]; FREEMAIL_CC(0.00)[linaro.org,baylibre.com,kernel.org,suse.com,roeck-us.net,gmail.com,pengutronix.de,linux-watchdog.org,nxp.com,linutronix.de,lakedaemon.net,walle.cc]; SUSPICIOUS_RECIPS(1.50)[] X-Spam: Yes X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200317_135051_048563_30F65725 X-CRM114-Status: GOOD ( 14.04 ) X-Spam-Score: -2.5 (--) X-Spam-Report: SpamAssassin version 3.4.3 on bombadil.infradead.org summary: Content analysis details: (-2.5 points) pts rule name description ---- ---------------------- -------------------------------------------------- -2.3 RCVD_IN_DNSWL_MED RBL: Sender listed at https://www.dnswl.org/, medium trust [2a01:4f8:151:8464:0:0:1:2 listed in] [list.dnswl.org] 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.0 SPF_PASS SPF: sender matches SPF record 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature 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: Marc Zyngier , Jean Delvare , Jason Cooper , Shawn Guo , Linus Walleij , Li Yang , Bartosz Golaszewski , Michael Walle , Rob Herring , Thierry Reding , =?utf-8?q?Uwe_Kleine-K=C3=B6nig?= , Thomas Gleixner , Wim Van Sebroeck , Lee Jones , Guenter Roeck Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org There might be multiple children with the device tree compatible, for example if a MFD has multiple instances of the same function. In this case only the first is matched and the other children get a wrong of_node reference. We distinguish them by looking at the reg property and match it against the mfd_cell id element if the latter is non-zero and the reg property exists in the device tree node. Signed-off-by: Michael Walle --- drivers/mfd/mfd-core.c | 26 +++++++++++++++++--------- 1 file changed, 17 insertions(+), 9 deletions(-) diff --git a/drivers/mfd/mfd-core.c b/drivers/mfd/mfd-core.c index e735565969b3..0e718e6cdbde 100644 --- a/drivers/mfd/mfd-core.c +++ b/drivers/mfd/mfd-core.c @@ -117,6 +117,7 @@ static int mfd_add_device(struct device *parent, int id, struct device_node *np = NULL; int ret = -ENOMEM; int platform_id; + u32 of_id; int r; if (id == PLATFORM_DEVID_AUTO) @@ -151,16 +152,23 @@ static int mfd_add_device(struct device *parent, int id, if (parent->of_node && cell->of_compatible) { for_each_child_of_node(parent->of_node, np) { - if (of_device_is_compatible(np, cell->of_compatible)) { - if (!of_device_is_available(np)) { - /* Ignore disabled devices error free */ - ret = 0; - goto fail_alias; - } - pdev->dev.of_node = np; - pdev->dev.fwnode = &np->fwnode; - break; + if (!of_device_is_compatible(np, cell->of_compatible)) + continue; + + /* match the reg property to the id */ + if (!of_property_read_u32(np, "reg", &of_id)) + if (cell->id && cell->id != of_id) + continue; + + if (!of_device_is_available(np)) { + /* Ignore disabled devices error free */ + ret = 0; + goto fail_alias; } + + pdev->dev.of_node = np; + pdev->dev.fwnode = &np->fwnode; + break; } }