From patchwork Tue Mar 18 10:36:22 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jayesh Choudhary X-Patchwork-Id: 14020768 Received: from lelvem-ot02.ext.ti.com (lelvem-ot02.ext.ti.com [198.47.23.235]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 70F5920459F; Tue, 18 Mar 2025 10:36:40 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.47.23.235 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1742294202; cv=none; b=eGJXkX0O8vzEPG6HBdWgERr3KH4afZNe9zunXUveP9dug3TV7tg3JZ9c59MfzJRVB/nHSW7x9OAJHVsMFiIEnluTmkUSw9Q7s6nBIPVItr8uTWpQfuDSGrJqXpeRX5FWYZq4jxT3reg5iJ4qyFX4rE0hWp5CJUeGwqBn+kLKEPQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1742294202; c=relaxed/simple; bh=Sai5g5/aPSCV0FNdoUWAXDOQb5aLvdETtjtDL4WuPys=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=F072zd1KUhEp91rj3eZNuwj3Uy5fI1vFTXKYF8NuMliyUNGvUM67zqefy7Me84Bzozjl1NWadOblxDzqY3oyUqqLtEOPTHrYEuKZMM8LUe/ezAQBNHDzgjvv+g6vQmse/Qosbf5ipX4EAFVvrEE4EY9GneLcWb3Tq5ZQeDoy074= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=ti.com; spf=pass smtp.mailfrom=ti.com; dkim=pass (1024-bit key) header.d=ti.com header.i=@ti.com header.b=ufrm5jsa; arc=none smtp.client-ip=198.47.23.235 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=ti.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=ti.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=ti.com header.i=@ti.com header.b="ufrm5jsa" Received: from fllv0034.itg.ti.com ([10.64.40.246]) by lelvem-ot02.ext.ti.com (8.15.2/8.15.2) with ESMTPS id 52IAaRCj3128589 (version=TLSv1.2 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 18 Mar 2025 05:36:27 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1742294187; bh=1lT0nGmOjXid+4lh3vU+4FUK8ztnz2+Zk32BL7lapu0=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=ufrm5jsaus9ObIh1rzJikit9rlKnY0qo6rIYN91Y0hHKGeCIA0ExK2ZLtlQgTGzu5 Ke6Wuj3klwcAlB5R6F9bYyxKSTnFRQiMn9Wh6ZHZuM9azgdi+69X7zoEyh9G8I758i 6isEafIJc8hUDpd84vcT0BbypvyV9DTCa0NtMZ74= Received: from DFLE114.ent.ti.com (dfle114.ent.ti.com [10.64.6.35]) by fllv0034.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 52IAaQDX125983 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Tue, 18 Mar 2025 05:36:26 -0500 Received: from DFLE112.ent.ti.com (10.64.6.33) by DFLE114.ent.ti.com (10.64.6.35) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2507.23; Tue, 18 Mar 2025 05:36:26 -0500 Received: from lelvsmtp6.itg.ti.com (10.180.75.249) by DFLE112.ent.ti.com (10.64.6.33) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2507.23 via Frontend Transport; Tue, 18 Mar 2025 05:36:26 -0500 Received: from localhost (jayesh-hp-z2-tower-g5-workstation.dhcp.ti.com [10.24.68.98]) by lelvsmtp6.itg.ti.com (8.15.2/8.15.2) with ESMTP id 52IAaPsl042214; Tue, 18 Mar 2025 05:36:26 -0500 From: Jayesh Choudhary To: , , , , , CC: , , , , , , , , , Subject: [PATCH 2/2] i2c: omap: Add support for setting mux Date: Tue, 18 Mar 2025 16:06:22 +0530 Message-ID: <20250318103622.29979-3-j-choudhary@ti.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20250318103622.29979-1-j-choudhary@ti.com> References: <20250318103622.29979-1-j-choudhary@ti.com> Precedence: bulk X-Mailing-List: linux-omap@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-C2ProcessedOrg: 333ef613-75bf-4e12-a4b1-8e3623f5dcea Some SoCs require muxes in the routing for SDA and SCL lines. Therefore, add support for setting the mux by reading the mux-states property from the dt-node. Signed-off-by: Jayesh Choudhary --- drivers/i2c/busses/Kconfig | 1 + drivers/i2c/busses/i2c-omap.c | 22 ++++++++++++++++++++++ 2 files changed, 23 insertions(+) diff --git a/drivers/i2c/busses/Kconfig b/drivers/i2c/busses/Kconfig index fc438f445771..0648e58b083e 100644 --- a/drivers/i2c/busses/Kconfig +++ b/drivers/i2c/busses/Kconfig @@ -940,6 +940,7 @@ config I2C_OMAP tristate "OMAP I2C adapter" depends on ARCH_OMAP || ARCH_K3 || COMPILE_TEST default MACH_OMAP_OSK + select MULTIPLEXER help If you say yes to this option, support will be included for the I2C interface on the Texas Instruments OMAP1/2 family of processors. diff --git a/drivers/i2c/busses/i2c-omap.c b/drivers/i2c/busses/i2c-omap.c index f18c3e74b076..16afb9ca19bb 100644 --- a/drivers/i2c/busses/i2c-omap.c +++ b/drivers/i2c/busses/i2c-omap.c @@ -24,6 +24,7 @@ #include #include #include +#include #include #include #include @@ -211,6 +212,7 @@ struct omap_i2c_dev { u16 syscstate; u16 westate; u16 errata; + struct mux_state *mux_state; }; static const u8 reg_map_ip_v1[] = { @@ -1452,6 +1454,23 @@ omap_i2c_probe(struct platform_device *pdev) (1000 * omap->speed / 8); } + if (of_property_read_bool(node, "mux-states")) { + struct mux_state *mux_state; + + mux_state = devm_mux_state_get(&pdev->dev, NULL); + if (IS_ERR(mux_state)) { + r = PTR_ERR(mux_state); + dev_dbg(&pdev->dev, "failed to get I2C mux: %d\n", r); + goto err_disable_pm; + } + omap->mux_state = mux_state; + r = mux_state_select(omap->mux_state); + if (r) { + dev_err(&pdev->dev, "failed to select I2C mux: %d\n", r); + goto err_disable_pm; + } + } + /* reset ASAP, clearing any IRQs */ omap_i2c_init(omap); @@ -1511,6 +1530,9 @@ static void omap_i2c_remove(struct platform_device *pdev) i2c_del_adapter(&omap->adapter); + if (omap->mux_state) + mux_state_deselect(omap->mux_state); + ret = pm_runtime_get_sync(&pdev->dev); if (ret < 0) dev_err(omap->dev, "Failed to resume hardware, skip disable\n");