From patchwork Wed Aug 31 15:23:01 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jarkko Nikula X-Patchwork-Id: 1117222 Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) by demeter1.kernel.org (8.14.4/8.14.4) with ESMTP id p7VFi6J2011251 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Wed, 31 Aug 2011 15:44:30 GMT Received: from canuck.infradead.org ([2001:4978:20e::1]) by merlin.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1QymwM-0007Ot-L8; Wed, 31 Aug 2011 15:42:58 +0000 Received: from localhost ([127.0.0.1] helo=canuck.infradead.org) by canuck.infradead.org with esmtp (Exim 4.76 #1 (Red Hat Linux)) id 1QymwL-0003fy-Qn; Wed, 31 Aug 2011 15:42:57 +0000 Received: from bitmer.com ([213.157.87.50]) by canuck.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1QymvG-0003PR-69 for linux-arm-kernel@lists.infradead.org; Wed, 31 Aug 2011 15:41:52 +0000 Received: from vasara.bitmer.com ([194.136.136.46] helo=localhost.localdomain) by bitmer.com with esmtpsa (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.69) (envelope-from ) id 1QymdQ-0005hE-JG; Wed, 31 Aug 2011 18:23:24 +0300 From: Jarkko Nikula To: linux-omap@vger.kernel.org Subject: [PATCH 14/14] omap: mcbsp: Start generalize signal muxing functions Date: Wed, 31 Aug 2011 18:23:01 +0300 Message-Id: <1314804181-17260-15-git-send-email-jarkko.nikula@bitmer.com> X-Mailer: git-send-email 1.7.5.4 In-Reply-To: <1314804181-17260-1-git-send-email-jarkko.nikula@bitmer.com> References: <1314804181-17260-1-git-send-email-jarkko.nikula@bitmer.com> X-CRM114-Version: 20090807-BlameThorstenAndJenny ( TRE 0.7.6 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20110831_114150_484631_7CDF1CBF X-CRM114-Status: GOOD ( 13.50 ) X-Spam-Score: -0.5 (/) X-Spam-Report: SpamAssassin version 3.3.1 on canuck.infradead.org summary: Content analysis details: (-0.5 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.5 RP_MATCHES_RCVD Envelope sender domain matches handover relay domain Cc: tony@atomide.com, Jarkko Nikula , linux-arm-kernel@lists.infradead.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: linux-arm-kernel-bounces@lists.infradead.org Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.6 (demeter1.kernel.org [140.211.167.41]); Wed, 31 Aug 2011 15:44:30 +0000 (UTC) This generalizes the omap2_mcbsp1_mux_clkr_src and omap2_mcbsp1_mux_fsr_src implementation between generic McBSP and OMAP2 specific McBSP code. These functions are used to select source for CLKR and FSR signals on OMAP2+. Start generalizing the code by implementing an optional mux_signal function pointer in platform data that will implement the actual muxing and which is called now from omap2_mcbsp1_mux_clkr_src and omap2_mcbsp1_mux_fsr_src. These functions are to be removed later and cleanup the API so that mux_signal gets its arguments directly from client code. Signed-off-by: Jarkko Nikula --- arch/arm/mach-omap2/mcbsp.c | 43 +++++++++++++++++------------- arch/arm/plat-omap/include/plat/mcbsp.h | 1 + arch/arm/plat-omap/mcbsp.c | 36 ++++++++++++++++++++------ 3 files changed, 53 insertions(+), 27 deletions(-) diff --git a/arch/arm/mach-omap2/mcbsp.c b/arch/arm/mach-omap2/mcbsp.c index 8a534b9..9c3c51e 100644 --- a/arch/arm/mach-omap2/mcbsp.c +++ b/arch/arm/mach-omap2/mcbsp.c @@ -34,33 +34,36 @@ #include "cm2xxx_3xxx.h" #include "cm-regbits-34xx.h" -/* McBSP internal signal muxing functions */ - -void omap2_mcbsp1_mux_clkr_src(u8 mux) +/* McBSP internal signal muxing function */ +static int omap2_mcbsp1_mux_rx_clk(struct device *dev, const char *signal, + const char *src) { u32 v; v = omap_ctrl_readl(OMAP2_CONTROL_DEVCONF0); - if (mux == CLKR_SRC_CLKR) - v &= ~OMAP2_MCBSP1_CLKR_MASK; - else if (mux == CLKR_SRC_CLKX) - v |= OMAP2_MCBSP1_CLKR_MASK; - omap_ctrl_writel(v, OMAP2_CONTROL_DEVCONF0); -} -EXPORT_SYMBOL(omap2_mcbsp1_mux_clkr_src); -void omap2_mcbsp1_mux_fsr_src(u8 mux) -{ - u32 v; + if (!strcmp(signal, "clkr")) { + if (!strcmp(src, "clkr")) + v &= ~OMAP2_MCBSP1_CLKR_MASK; + else if (!strcmp(src, "clkx")) + v |= OMAP2_MCBSP1_CLKR_MASK; + else + return -EINVAL; + } else if (!strcmp(signal, "fsr")) { + if (!strcmp(src, "fsr")) + v &= ~OMAP2_MCBSP1_FSR_MASK; + else if (!strcmp(src, "fsx")) + v |= OMAP2_MCBSP1_FSR_MASK; + else + return -EINVAL; + } else { + return -EINVAL; + } - v = omap_ctrl_readl(OMAP2_CONTROL_DEVCONF0); - if (mux == FSR_SRC_FSR) - v &= ~OMAP2_MCBSP1_FSR_MASK; - else if (mux == FSR_SRC_FSX) - v |= OMAP2_MCBSP1_FSR_MASK; omap_ctrl_writel(v, OMAP2_CONTROL_DEVCONF0); + + return 0; } -EXPORT_SYMBOL(omap2_mcbsp1_mux_fsr_src); /* McBSP CLKS source switching function */ static int omap2_mcbsp_set_clk_src(struct device *dev, struct clk *clk, @@ -181,6 +184,8 @@ static int omap_init_mcbsp(struct omap_hwmod *oh, void *unused) return PTR_ERR(od); } pdata->set_clk_src = omap2_mcbsp_set_clk_src; + if (id == 1) + pdata->mux_signal = omap2_mcbsp1_mux_rx_clk; omap_mcbsp_count++; return 0; } diff --git a/arch/arm/plat-omap/include/plat/mcbsp.h b/arch/arm/plat-omap/include/plat/mcbsp.h index c8ebfc9..8fa74e2 100644 --- a/arch/arm/plat-omap/include/plat/mcbsp.h +++ b/arch/arm/plat-omap/include/plat/mcbsp.h @@ -309,6 +309,7 @@ struct omap_mcbsp_platform_data { bool has_ccr; /* Transceiver has configuration control registers */ int (*enable_st_clock)(unsigned int, bool); int (*set_clk_src)(struct device *dev, struct clk *clk, const char *src); + int (*mux_signal)(struct device *dev, const char *signal, const char *src); }; struct omap_mcbsp_st_data { diff --git a/arch/arm/plat-omap/mcbsp.c b/arch/arm/plat-omap/mcbsp.c index 38b67d9..4b15cd7 100644 --- a/arch/arm/plat-omap/mcbsp.c +++ b/arch/arm/plat-omap/mcbsp.c @@ -922,21 +922,41 @@ int omap2_mcbsp_set_clks_src(u8 id, u8 fck_src_id) } EXPORT_SYMBOL(omap2_mcbsp_set_clks_src); -#ifndef CONFIG_ARCH_OMAP2PLUS void omap2_mcbsp1_mux_clkr_src(u8 mux) { - WARN(1, "%s: should never be called on an OMAP1-only kernel\n", - __func__); - return; + struct omap_mcbsp *mcbsp; + const char *src; + + if (mux == CLKR_SRC_CLKR) + src = "clkr"; + else if (mux == CLKR_SRC_CLKX) + src = "clkx"; + else + return; + + mcbsp = id_to_mcbsp_ptr(0); + if (mcbsp->pdata->mux_signal) + mcbsp->pdata->mux_signal(mcbsp->dev, "clkr", src); } +EXPORT_SYMBOL(omap2_mcbsp1_mux_clkr_src); void omap2_mcbsp1_mux_fsr_src(u8 mux) { - WARN(1, "%s: should never be called on an OMAP1-only kernel\n", - __func__); - return; + struct omap_mcbsp *mcbsp; + const char *src; + + if (mux == FSR_SRC_FSR) + src = "fsr"; + else if (mux == FSR_SRC_FSX) + src = "fsx"; + else + return; + + mcbsp = id_to_mcbsp_ptr(0); + if (mcbsp->pdata->mux_signal) + mcbsp->pdata->mux_signal(mcbsp->dev, "fsr", src); } -#endif +EXPORT_SYMBOL(omap2_mcbsp1_mux_fsr_src); #define max_thres(m) (mcbsp->pdata->buffer_size) #define valid_threshold(m, val) ((val) <= max_thres(m))