From patchwork Wed Nov 20 03:12:27 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Simon Horman X-Patchwork-Id: 3208941 Return-Path: X-Original-To: patchwork-ltsi-dev@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 5F4C6C045B for ; Wed, 20 Nov 2013 05:29:16 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 8BD25206CD for ; Wed, 20 Nov 2013 05:29:15 +0000 (UTC) Received: from mail.linuxfoundation.org (mail.linuxfoundation.org [140.211.169.12]) by mail.kernel.org (Postfix) with ESMTP id A7ECF206C7 for ; Wed, 20 Nov 2013 05:29:14 +0000 (UTC) Received: from mail.linux-foundation.org (localhost [IPv6:::1]) by mail.linuxfoundation.org (Postfix) with ESMTP id 68A23105B; Wed, 20 Nov 2013 05:28:26 +0000 (UTC) X-Original-To: ltsi-dev@lists.linuxfoundation.org Delivered-To: ltsi-dev@mail.linuxfoundation.org Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org [172.17.192.35]) by mail.linuxfoundation.org (Postfix) with ESMTP id 87F1DF99 for ; Wed, 20 Nov 2013 05:28:21 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 Received: from kirsty.vergenet.net (kirsty.vergenet.net [202.4.237.240]) by smtp1.linuxfoundation.org (Postfix) with ESMTP id 76FDF210C5 for ; Wed, 20 Nov 2013 05:28:20 +0000 (UTC) Received: from ayumi.isobedori.kobe.vergenet.net (p2020-ipbfp1604kobeminato.hyogo.ocn.ne.jp [114.154.85.20]) by kirsty.vergenet.net (Postfix) with ESMTP id E16BC26716E; Wed, 20 Nov 2013 14:22:17 +1100 (EST) Received: by ayumi.isobedori.kobe.vergenet.net (Postfix, from userid 7100) id 384576CE6E5; Wed, 20 Nov 2013 12:22:16 +0900 (JST) From: Simon Horman To: ltsi-dev@lists.linuxfoundation.org Date: Wed, 20 Nov 2013 12:12:27 +0900 Message-Id: <1384917713-15962-30-git-send-email-horms+renesas@verge.net.au> X-Mailer: git-send-email 1.8.4 In-Reply-To: <1384917713-15962-1-git-send-email-horms+renesas@verge.net.au> References: <1384917713-15962-1-git-send-email-horms+renesas@verge.net.au> X-Spam-Status: No, score=-2.4 required=5.0 tests=BAYES_00,RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org Cc: Magnus Damm Subject: [LTSI-dev] [PATCH ltsi-3.10 029/595] i2c: rcar: add rcar-H2 support X-BeenThere: ltsi-dev@lists.linuxfoundation.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "A list to discuss patches, development, and other things related to the LTSI project" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: ltsi-dev-bounces@lists.linuxfoundation.org Errors-To: ltsi-dev-bounces@lists.linuxfoundation.org X-Virus-Scanned: ClamAV using ClamSMTP From: Nguyen Viet Dung This patch modify I2C driver of rcar-H1 to usable on both rcar-H1 and rcar-H2. Signed-off-by: Nguyen Viet Dung Signed-off-by: Wolfram Sang (cherry picked from commit b720423a2627f045133bec39a31fe2bc0dab86f3) Signed-off-by: Simon Horman --- drivers/i2c/busses/i2c-rcar.c | 35 +++++++++++++++++++++++++++++++++-- 1 file changed, 33 insertions(+), 2 deletions(-) diff --git a/drivers/i2c/busses/i2c-rcar.c b/drivers/i2c/busses/i2c-rcar.c index 4ba4a95..18e0337 100644 --- a/drivers/i2c/busses/i2c-rcar.c +++ b/drivers/i2c/busses/i2c-rcar.c @@ -101,6 +101,11 @@ enum { #define ID_ARBLOST (1 << 3) #define ID_NACK (1 << 4) +enum rcar_i2c_type { + I2C_RCAR_H1, + I2C_RCAR_H2, +}; + struct rcar_i2c_priv { void __iomem *io; struct i2c_adapter adap; @@ -113,6 +118,7 @@ struct rcar_i2c_priv { int irq; u32 icccr; u32 flags; + enum rcar_i2c_type devtype; }; #define rcar_i2c_priv_to_dev(p) ((p)->adap.dev.parent) @@ -224,12 +230,25 @@ static int rcar_i2c_clock_calculate(struct rcar_i2c_priv *priv, u32 scgd, cdf; u32 round, ick; u32 scl; + u32 cdf_width; if (!clkp) { dev_err(dev, "there is no peripheral_clk\n"); return -EIO; } + switch (priv->devtype) { + case I2C_RCAR_H1: + cdf_width = 2; + break; + case I2C_RCAR_H2: + cdf_width = 3; + break; + default: + dev_err(dev, "device type error\n"); + return -EIO; + } + /* * calculate SCL clock * see @@ -245,7 +264,7 @@ static int rcar_i2c_clock_calculate(struct rcar_i2c_priv *priv, * clkp : peripheral_clk * F[] : integer up-valuation */ - for (cdf = 0; cdf < 4; cdf++) { + for (cdf = 0; cdf < (1 << cdf_width); cdf++) { ick = clk_get_rate(clkp) / (1 + cdf); if (ick < 20000000) goto ick_find; @@ -287,7 +306,7 @@ scgd_find: /* * keep icccr value */ - priv->icccr = (scgd << 2 | cdf); + priv->icccr = (scgd << (cdf_width) | cdf); return 0; } @@ -638,6 +657,9 @@ static int rcar_i2c_probe(struct platform_device *pdev) bus_speed = 100000; /* default 100 kHz */ if (pdata && pdata->bus_speed) bus_speed = pdata->bus_speed; + + priv->devtype = platform_get_device_id(pdev)->driver_data; + ret = rcar_i2c_clock_calculate(priv, bus_speed, dev); if (ret < 0) return ret; @@ -691,6 +713,14 @@ static int rcar_i2c_remove(struct platform_device *pdev) return 0; } +static struct platform_device_id rcar_i2c_id_table[] = { + { "i2c-rcar", I2C_RCAR_H1 }, + { "i2c-rcar_h1", I2C_RCAR_H1 }, + { "i2c-rcar_h2", I2C_RCAR_H2 }, + {}, +}; +MODULE_DEVICE_TABLE(platform, rcar_i2c_id_table); + static struct platform_driver rcar_i2c_driver = { .driver = { .name = "i2c-rcar", @@ -698,6 +728,7 @@ static struct platform_driver rcar_i2c_driver = { }, .probe = rcar_i2c_probe, .remove = rcar_i2c_remove, + .id_table = rcar_i2c_id_table, }; module_platform_driver(rcar_i2c_driver);