From mboxrd@z Thu Jan 1 00:00:00 1970 Delivery-date: Mon, 18 May 2026 16:55:30 +0200 Received: from metis.whiteo.stw.pengutronix.de ([2a0a:edc0:2:b01:1d::104]) by lore.white.stw.pengutronix.de with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1wOzNS-001AXO-2x for lore@lore.pengutronix.de; Mon, 18 May 2026 16:55:30 +0200 Received: from bombadil.infradead.org ([2607:7c80:54:3::133]) by metis.whiteo.stw.pengutronix.de with esmtp (Exim 4.92) (envelope-from ) id 1wOzNS-00073U-Ak for lore@pengutronix.de; Mon, 18 May 2026 16:55:30 +0200 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:To:In-Reply-To:References: Message-Id:Content-Transfer-Encoding:Content-Type:MIME-Version:Subject:Date: From:Reply-To:Cc:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=LM4pjpmw0yNfTApn5ysCVvOqhi4PkWqXeaJt4YmDQrA=; b=tj1q20a9mCX+LAJ4xHXYQ4OdGU 9DcvDlOeTs91yNAex6k3ZdVguJreiICrIkjubq6DDeEToExXoZuNOmhnNbRgn6pXnsVQ/21G7PSp/ ipxuAzuKAMjGwkwoREQ1e90AHBHLXv379XLuinS6IMQJuerADvLl8HJHJhcUATTt1ES4rB2fPjTzb WrjGSvT5087V5JDJ9yLDUQlxuejt+TzQP8jkF7UhoFUcbfPq4X5Y3riprI8lumunKZBZuQ4rQo8Qs gnhFmrhCLg7XX/Cjl9w0k0tor0tKroMh8xG8N1cNeOo2qXMrK+vbHqyaMcPNyjgz9h18BG98uDZeo xBr75QuQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wOy5Z-0000000FpFr-33OS; Mon, 18 May 2026 13:32:57 +0000 Received: from metis.whiteo.stw.pengutronix.de ([2a0a:edc0:2:b01:1d::104]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1wOy5X-0000000FpF5-1H36 for barebox@lists.infradead.org; Mon, 18 May 2026 13:32:56 +0000 Received: from drehscheibe.grey.stw.pengutronix.de ([2a0a:edc0:0:c01:1d::a2]) by metis.whiteo.stw.pengutronix.de with esmtp (Exim 4.92) (envelope-from ) id 1wOy5V-00059N-8E; Mon, 18 May 2026 15:32:53 +0200 Received: from dude02.red.stw.pengutronix.de ([2a0a:edc0:0:1101:1d::28]) by drehscheibe.grey.stw.pengutronix.de with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1wOy5U-000bSk-23; Mon, 18 May 2026 15:32:53 +0200 Received: from [::1] (helo=dude02.red.stw.pengutronix.de) by dude02.red.stw.pengutronix.de with esmtp (Exim 4.98.2) (envelope-from ) id 1wOxmr-000000000ZS-46uW; Mon, 18 May 2026 15:13:37 +0200 From: Sascha Hauer Date: Mon, 18 May 2026 15:13:45 +0200 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260518-rockchip-emmc-hs400-v2-10-789ce495f70b@pengutronix.de> References: <20260518-rockchip-emmc-hs400-v2-0-789ce495f70b@pengutronix.de> In-Reply-To: <20260518-rockchip-emmc-hs400-v2-0-789ce495f70b@pengutronix.de> To: BAREBOX X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; a=ed25519-sha256; t=1779110017; l=1761; i=s.hauer@pengutronix.de; s=20230412; h=from:subject:message-id; bh=4iXc9qwscSqh9FXc6atMyxr+/dkTO3qK+Ju1vq08D1U=; b=bDuWm3/Yjz78uhzt4/ML3f7iwNmTPsyDc6kGMrN3/oip2Qaerjmv7vq9tUG3+dNcfYgU23OnB EDPoZMp344kBH79vyoDgITHzxjsfslo2U50AU2OtdqXLoHuMGBB7gfV X-Developer-Key: i=s.hauer@pengutronix.de; a=ed25519; pk=4kuc9ocmECiBJKWxYgqyhtZOHj5AWi7+d0n/UjhkwTg= X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260518_063255_356913_B54BE2B0 X-CRM114-Status: GOOD ( 10.15 ) 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.whiteo.stw.pengutronix.de X-Spam-Level: X-Spam-Status: No, score=-5.1 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 v2 10/10] mci: sdhci: rockchip: support HS400 Enhanced Strobe X-SA-Exim-Version: 4.2.1 (built Wed, 08 May 2019 21:11:16 +0000) X-SA-Exim-Scanned: Yes (on metis.whiteo.stw.pengutronix.de) Implement the hs400_enhanced_strobe op so the dwcmshc controller samples on the eMMC strobe instead of the source clock when in HS400ES. The bit lives at EMMC_CONTROL[8] (DWCMSHC_ENHANCED_STROBE) in the same vendor area register that already holds CARD_IS_EMMC. Assisted-by: Claude Opus 4.7 Signed-off-by: Sascha Hauer --- drivers/mci/rockchip-dwcmshc-sdhci.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/drivers/mci/rockchip-dwcmshc-sdhci.c b/drivers/mci/rockchip-dwcmshc-sdhci.c index 2b55456f05..408b1e544a 100644 --- a/drivers/mci/rockchip-dwcmshc-sdhci.c +++ b/drivers/mci/rockchip-dwcmshc-sdhci.c @@ -19,6 +19,7 @@ #define DWCMSHC_HOST_CTRL3 0x508 #define DWCMSHC_EMMC_CONTROL 0x52c #define DWCMSHC_CARD_IS_EMMC BIT(0) +#define DWCMSHC_ENHANCED_STROBE BIT(8) #define DWCMSHC_EMMC_ATCTRL 0x540 /* Rockchip specific Registers */ @@ -363,12 +364,24 @@ static int rk_sdhci_execute_tuning(struct mci_host *mci, u32 opcode) return sdhci_execute_tuning(&host->sdhci, opcode); } +static void rk_sdhci_hs400_enhanced_strobe(struct mci_host *mci, + struct mci_ios *ios) +{ + struct rk_sdhci_host *host = to_rk_sdhci_host(mci); + u32 val; + + val = sdhci_read32(&host->sdhci, DWCMSHC_EMMC_CONTROL); + val |= DWCMSHC_ENHANCED_STROBE; + sdhci_write32(&host->sdhci, DWCMSHC_EMMC_CONTROL, val); +} + static const struct mci_ops rk_sdhci_ops = { .send_cmd = rk_sdhci_send_cmd, .set_ios = rk_sdhci_set_ios, .init = rk_sdhci_init, .card_present = rk_sdhci_card_present, .execute_tuning = rk_sdhci_execute_tuning, + .hs400_enhanced_strobe = rk_sdhci_hs400_enhanced_strobe, }; static int rk_sdhci_probe(struct device *dev) -- 2.47.3