From patchwork Mon Mar 29 01:52:03 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chris Packham X-Patchwork-Id: 410995 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id D8BD5C433E3 for ; Mon, 29 Mar 2021 01:53:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id AE19D61941 for ; Mon, 29 Mar 2021 01:53:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231124AbhC2Bwk (ORCPT ); Sun, 28 Mar 2021 21:52:40 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49624 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230500AbhC2BwO (ORCPT ); Sun, 28 Mar 2021 21:52:14 -0400 Received: from gate2.alliedtelesis.co.nz (gate2.alliedtelesis.co.nz [IPv6:2001:df5:b000:5::4]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id AAE06C0613B1 for ; Sun, 28 Mar 2021 18:52:13 -0700 (PDT) Received: from svr-chch-seg1.atlnz.lc (mmarshal3.atlnz.lc [10.32.18.43]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by gate2.alliedtelesis.co.nz (Postfix) with ESMTPS id 86261891B0; Mon, 29 Mar 2021 14:52:08 +1300 (NZDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=alliedtelesis.co.nz; s=mail181024; t=1616982728; bh=XDJbfne7N1LjIIlJ6HihImFlbELO64kA3X/jYn/Ldyw=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=UJY2MEX37PrjOSInNLXz4EEnx7CsM+YFswl30yGDWedP6Nwcmt1sZwv0pBggVfGry clgT2CTg+uj/dR/6bPTk+5kjs9+5Pd/4MzaER2LV+qdyAwve0bG5y5dg150AEoFVmU 6Tox+XI6isHqtgFpmGLPFqsEnz1f5fex7r0Oh4NsYDIF550wDEdzw86SMbi0fbBDad UvPZ7Y9IqFLKFLwrBY5pGHam7hECw9UMzaU5aeKmi+2FpjSogSjUVKfrXkkNf/cofG HM8Cm9jxPmiJf87gNkNPA/xTa7ExRIMWMR5bCSnxNvkjRDqAmjLpP2QKNBNjz82wkp vZtBaFrlTZBng== Received: from smtp (Not Verified[10.32.16.33]) by svr-chch-seg1.atlnz.lc with Trustwave SEG (v8, 2, 6, 11305) id ; Mon, 29 Mar 2021 14:52:08 +1300 Received: from chrisp-dl.ws.atlnz.lc (chrisp-dl.ws.atlnz.lc [10.33.22.20]) by smtp (Postfix) with ESMTP id C0F3813EED4; Mon, 29 Mar 2021 14:52:25 +1300 (NZDT) Received: by chrisp-dl.ws.atlnz.lc (Postfix, from userid 1030) id EC8E8284081; Mon, 29 Mar 2021 14:52:08 +1300 (NZDT) From: Chris Packham To: robh+dt@kernel.org, linux@roeck-us.net, wsa@kernel.org, jdelvare@suse.com Cc: linux-i2c@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Chris Packham Subject: [PATCH v2 3/6] i2c: mpc: Make use of i2c_recover_bus() Date: Mon, 29 Mar 2021 14:52:03 +1300 Message-Id: <20210329015206.17437-4-chris.packham@alliedtelesis.co.nz> X-Mailer: git-send-email 2.31.0 In-Reply-To: <20210329015206.17437-1-chris.packham@alliedtelesis.co.nz> References: <20210329015206.17437-1-chris.packham@alliedtelesis.co.nz> MIME-Version: 1.0 X-SEG-SpamProfiler-Analysis: v=2.3 cv=GfppYjfL c=1 sm=1 tr=0 a=KLBiSEs5mFS1a/PbTCJxuA==:117 a=dESyimp9J3IA:10 a=SdC2vBNBQt3qShdCGKMA:9 a=fCgQI5UlmZDRPDxm0A3o:22 X-SEG-SpamProfiler-Score: 0 x-atlnz-ls: pat Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Move the existing calls of mpc_i2c_fixup() to a recovery function registered via bus_recovery_info. This makes it more obvious that recovery is supported and allows for a future where recovery is triggered by the i2c core. Signed-off-by: Chris Packham --- drivers/i2c/busses/i2c-mpc.c | 18 ++++++++++++++++-- 1 file changed, 16 insertions(+), 2 deletions(-) diff --git a/drivers/i2c/busses/i2c-mpc.c b/drivers/i2c/busses/i2c-mpc.c index d94f05c8b8b7..6a0d55e9e8e3 100644 --- a/drivers/i2c/busses/i2c-mpc.c +++ b/drivers/i2c/busses/i2c-mpc.c @@ -586,7 +586,7 @@ static int mpc_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num) if ((status & (CSR_MCF | CSR_MBB | CSR_RXAK)) != 0) { writeb(status & ~CSR_MAL, i2c->base + MPC_I2C_SR); - mpc_i2c_fixup(i2c); + i2c_recover_bus(&i2c->adap); } return -EIO; } @@ -622,7 +622,7 @@ static int mpc_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num) if ((status & (CSR_MCF | CSR_MBB | CSR_RXAK)) != 0) { writeb(status & ~CSR_MAL, i2c->base + MPC_I2C_SR); - mpc_i2c_fixup(i2c); + i2c_recover_bus(&i2c->adap); } return -EIO; } @@ -637,6 +637,15 @@ static u32 mpc_functionality(struct i2c_adapter *adap) | I2C_FUNC_SMBUS_READ_BLOCK_DATA | I2C_FUNC_SMBUS_BLOCK_PROC_CALL; } +static int fsl_i2c_bus_recovery(struct i2c_adapter *adap) +{ + struct mpc_i2c *i2c = i2c_get_adapdata(adap); + + mpc_i2c_fixup(i2c); + + return 0; +} + static const struct i2c_algorithm mpc_algo = { .master_xfer = mpc_xfer, .functionality = mpc_functionality, @@ -648,6 +657,10 @@ static struct i2c_adapter mpc_ops = { .timeout = HZ, }; +static struct i2c_bus_recovery_info fsl_i2c_recovery_info = { + .recover_bus = fsl_i2c_bus_recovery, +}; + static const struct of_device_id mpc_i2c_of_match[]; static int fsl_i2c_probe(struct platform_device *op) { @@ -740,6 +753,7 @@ static int fsl_i2c_probe(struct platform_device *op) i2c_set_adapdata(&i2c->adap, i2c); i2c->adap.dev.parent = &op->dev; i2c->adap.dev.of_node = of_node_get(op->dev.of_node); + i2c->adap.bus_recovery_info = &fsl_i2c_recovery_info; result = i2c_add_adapter(&i2c->adap); if (result < 0)