From nobody Mon Feb 9 05:53:09 2026 Received: from out-184.mta0.migadu.com (out-184.mta0.migadu.com [91.218.175.184]) (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 CCFAB548F4 for ; Fri, 15 Mar 2024 21:35:57 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=91.218.175.184 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1710538561; cv=none; b=lFyldYsdPLgLF1dz7pWeIetMfsxZvSQYWXjeckx8Z3krLR5Ye11KkEncuyUjCU05A5kszCEh3msqN7P3+snJtghhZ9UTMTrM6y+X/xZarHw7qXC449DAMTxooln1vsoU73fp12x2X7U/qiXKVk/dcZm9YhnVD/3MFWj/7IGF9PI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1710538561; c=relaxed/simple; bh=CG2MR7sO9yin4h+PbF8Oq5ga4DEY+K/45S38A5VbGSU=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=vCRi+UO5XaMTRFAo3DbyoApVGNIA24qlxl+W+fWRX3ApRFB5ZSwO5sjwzRAIm1YtCbvifxn7ShEmlDouLiYwEVJ2ZLknRmBnzkaL3rz2cDT+KSFwVXQKtK7GaT6VPig3IQpf0n/ODMwgdD+VbKX9d34lKp8N4aPUjEjaktYqFGM= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev; spf=pass smtp.mailfrom=linux.dev; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b=TR8k0t9H; arc=none smtp.client-ip=91.218.175.184 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.dev Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b="TR8k0t9H" X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1710538555; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=zLhbNCpAsdnAMm/9yoY8p/qO8u7ebloSJXuKEpMzYWA=; b=TR8k0t9HMgzywrFBM7L3wdTnNZLquR0M5r0jLh9Abig5sBkYd36GADUjpcYywentdEmUNr 9DdvV5lea2SIDb6hN//OpuPmBH5d5pLucUzqcdYpfjShUSGLtn64SkcbK0vaEqwUD3zkbp RFlObyIa4rSHXGt1MwbBQeenS3otouU= From: Sean Anderson To: Arnd Bergmann , Greg Kroah-Hartman , linux-kernel@vger.kernel.org Cc: Sean Anderson Subject: [PATCH] misc: ds1682: Add NVMEM support Date: Fri, 15 Mar 2024 17:35:40 -0400 Message-Id: <20240315213540.1682964-1-sean.anderson@linux.dev> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Migadu-Flow: FLOW_OUT Content-Type: text/plain; charset="utf-8" Add NVMEM support for the internal EEPROM. Signed-off-by: Sean Anderson --- drivers/misc/ds1682.c | 37 +++++++++++++++++++++++++++++++++++++ 1 file changed, 37 insertions(+) diff --git a/drivers/misc/ds1682.c b/drivers/misc/ds1682.c index 21fc5bc85c5c..5f8dcd0e3848 100644 --- a/drivers/misc/ds1682.c +++ b/drivers/misc/ds1682.c @@ -32,6 +32,7 @@ #include #include #include +#include #include #include #include @@ -197,11 +198,43 @@ static const struct bin_attribute ds1682_eeprom_attr = =3D { .write =3D ds1682_eeprom_write, }; =20 +static int ds1682_nvmem_read(void *priv, unsigned int offset, void *val, + size_t bytes) +{ + struct i2c_client *client =3D priv; + int ret; + + ret =3D i2c_smbus_read_i2c_block_data(client, DS1682_REG_EEPROM + offset, + bytes, val); + return ret < 0 ? ret : 0; +} + +static int ds1682_nvmem_write(void *priv, unsigned int offset, void *val, + size_t bytes) +{ + struct i2c_client *client =3D priv; + int ret; + + ret =3D i2c_smbus_write_i2c_block_data(client, DS1682_REG_EEPROM + offset, + bytes, val); + return ret < 0 ? ret : 0; +} + /* * Called when a ds1682 device is matched with this driver */ static int ds1682_probe(struct i2c_client *client) { + struct nvmem_config config =3D { + .dev =3D &client->dev, + .owner =3D THIS_MODULE, + .type =3D NVMEM_TYPE_EEPROM, + .reg_read =3D ds1682_nvmem_read, + .reg_write =3D ds1682_nvmem_write, + .size =3D DS1682_EEPROM_SIZE, + .priv =3D client, + }; + struct nvmem_device *nvmem; int rc; =20 if (!i2c_check_functionality(client->adapter, @@ -211,6 +244,10 @@ static int ds1682_probe(struct i2c_client *client) goto exit; } =20 + nvmem =3D devm_nvmem_register(&client->dev, &config); + if (IS_ENABLED(CONFIG_NVMEM) && IS_ERR(nvmem)) + return PTR_ERR(nvmem); + rc =3D sysfs_create_group(&client->dev.kobj, &ds1682_group); if (rc) goto exit; --=20 2.35.1.1320.gc452695387.dirty