From mboxrd@z Thu Jan 1 00:00:00 1970 Delivery-date: Wed, 11 Jan 2023 18:42:55 +0100 Received: from metis.ext.pengutronix.de ([2001:67c:670:201:290:27ff:fe1d:cc33]) by lore.white.stw.pengutronix.de with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1pFf7o-0091f0-J4 for lore@lore.pengutronix.de; Wed, 11 Jan 2023 18:42:55 +0100 Received: from bombadil.infradead.org ([2607:7c80:54:3::133]) by metis.ext.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1pFf7l-0005yX-6R for lore@pengutronix.de; Wed, 11 Jan 2023 18:42:55 +0100 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=+B3LEWpT3SlQdsjEAA38v3RLi2GVPdSy39yqy/iHqDY=; b=c6JEdJaDQLSZbWW0UoL4hDexB6 GfiYfFlaP2JyCk1UZmBofE+NL8C2bsmK/oQA5bTl+c/uVGHU7VE+8bJtEzds4l2os2Hk9SYYh21qm TFbeNcI/eBYbBU5gVk67l2DLoNaC1kYI0sOveCCyziDbvAeTQ8/zrI7PDzdIcChNnxVrGW0nKBxhR sn/dohISy5ZsVZ2extMIfeppX6DwKIEYxcEiOcxQsbr0w45RMOPbdIRnF6Yo4B2oadmf7pPa9kH+t 60ybzFveGMVFLnJz+IAW0QtEIzzl+9TJtrTImFGWFujcTsPAeWYZUqXGY+woXoc64TjQTEeLA1VqZ q6+UazKg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1pFf6K-00CTm5-8V; Wed, 11 Jan 2023 17:41:24 +0000 Received: from metis.ext.pengutronix.de ([2001:67c:670:201:290:27ff:fe1d:cc33]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1pFf5T-00CTI4-2t for barebox@lists.infradead.org; Wed, 11 Jan 2023 17:40:35 +0000 Received: from drehscheibe.grey.stw.pengutronix.de ([2a0a:edc0:0:c01:1d::a2]) by metis.ext.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1pFf5R-00054G-UE; Wed, 11 Jan 2023 18:40:29 +0100 Received: from [2a0a:edc0:0:1101:1d::ac] (helo=dude04.red.stw.pengutronix.de) by drehscheibe.grey.stw.pengutronix.de with esmtp (Exim 4.94.2) (envelope-from ) id 1pFf5R-005M6k-90; Wed, 11 Jan 2023 18:40:29 +0100 Received: from afa by dude04.red.stw.pengutronix.de with local (Exim 4.94.2) (envelope-from ) id 1pFf5O-007DGB-EP; Wed, 11 Jan 2023 18:40:26 +0100 From: Ahmad Fatoum To: barebox@lists.infradead.org Cc: Ahmad Fatoum Date: Wed, 11 Jan 2023 18:40:10 +0100 Message-Id: <20230111174023.1719129-3-a.fatoum@pengutronix.de> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20230111174023.1719129-1-a.fatoum@pengutronix.de> References: <20230111174023.1719129-1-a.fatoum@pengutronix.de> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230111_094031_225884_91F101B9 X-CRM114-Status: GOOD ( 12.07 ) X-BeenThere: barebox@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "barebox" X-SA-Exim-Connect-IP: 2607:7c80:54:3::133 X-SA-Exim-Mail-From: barebox-bounces+lore=pengutronix.de@lists.infradead.org X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on metis.ext.pengutronix.de X-Spam-Level: X-Spam-Status: No, score=-4.7 required=4.0 tests=AWL,BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED,SPF_HELO_NONE,SPF_NONE autolearn=unavailable autolearn_force=no version=3.4.2 Subject: [PATCH 02/15] mtd: nand: base: implement nand_gpio_waitrdy X-SA-Exim-Version: 4.2.1 (built Wed, 08 May 2019 21:11:16 +0000) X-SA-Exim-Scanned: Yes (on metis.ext.pengutronix.de) To simplify porting kernel NAND drivers a tiny bit, provide the Linux nand_gpio_waitrdy. This is readily implementable with barebox' own gpio_poll_timeout_us. Signed-off-by: Ahmad Fatoum --- drivers/mtd/nand/nand_base.c | 22 ++++++++++++++++++++++ include/linux/mtd/rawnand.h | 2 ++ 2 files changed, 24 insertions(+) diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c index 4c90ad975771..c3cd22935bb2 100644 --- a/drivers/mtd/nand/nand_base.c +++ b/drivers/mtd/nand/nand_base.c @@ -36,6 +36,7 @@ #include #include #include +#include #include #include @@ -785,6 +786,27 @@ int nand_soft_waitrdy(struct nand_chip *chip, unsigned long timeout_ms) }; EXPORT_SYMBOL_GPL(nand_soft_waitrdy); +/** + * nand_gpio_waitrdy - Poll R/B GPIO pin until ready + * @chip: NAND chip structure + * @gpiod: GPIO descriptor of R/B pin + * @timeout_ms: Timeout in ms + * + * Poll the R/B GPIO pin until it becomes ready. If that does not happen + * whitin the specified timeout, -ETIMEDOUT is returned. + * + * This helper is intended to be used when the controller has access to the + * NAND R/B pin over GPIO. + * + * Return 0 if the R/B pin indicates chip is ready, a negative error otherwise. + */ +int nand_gpio_waitrdy(struct nand_chip *chip, int gpio, + unsigned long timeout_ms) +{ + return gpio_poll_timeout_us(gpio, true, timeout_ms * USEC_PER_MSEC); +}; +EXPORT_SYMBOL_GPL(nand_gpio_waitrdy); + static bool nand_supports_get_features(struct nand_chip *chip, int addr) { return (chip->parameters.supports_set_get_features && diff --git a/include/linux/mtd/rawnand.h b/include/linux/mtd/rawnand.h index 1147f235a680..a05c67e1404b 100644 --- a/include/linux/mtd/rawnand.h +++ b/include/linux/mtd/rawnand.h @@ -1414,6 +1414,8 @@ void nand_cleanup(struct nand_chip *chip); * instruction and have no physical pin to check it. */ int nand_soft_waitrdy(struct nand_chip *chip, unsigned long timeout_ms); +int nand_gpio_waitrdy(struct nand_chip *chip, int gpio, + unsigned long timeout_ms); /* Select/deselect a NAND target. */ void nand_select_target(struct nand_chip *chip, unsigned int cs); -- 2.30.2