From patchwork Mon Nov 5 09:12:25 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: avinash philip X-Patchwork-Id: 1695621 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork2.kernel.org Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) by patchwork2.kernel.org (Postfix) with ESMTP id 048FBDF2AB for ; Mon, 5 Nov 2012 09:33:39 +0000 (UTC) Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.76 #1 (Red Hat Linux)) id 1TVJ0d-0006nl-KF; Mon, 05 Nov 2012 09:30:20 +0000 Received: from comal.ext.ti.com ([198.47.26.152]) by merlin.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1TVJ09-0006Z9-Vr for linux-arm-kernel@lists.infradead.org; Mon, 05 Nov 2012 09:29:52 +0000 Received: from dbdp20.itg.ti.com ([172.24.170.38]) by comal.ext.ti.com (8.13.7/8.13.7) with ESMTP id qA59TeHN028097; Mon, 5 Nov 2012 03:29:41 -0600 Received: from DBDE71.ent.ti.com (localhost [127.0.0.1]) by dbdp20.itg.ti.com (8.13.8/8.13.8) with ESMTP id qA59TeaE008084; Mon, 5 Nov 2012 14:59:40 +0530 (IST) Received: from dbdp32.itg.ti.com (172.24.170.251) by DBDE71.ent.ti.com (172.24.170.149) with Microsoft SMTP Server id 14.1.323.3; Mon, 5 Nov 2012 14:59:39 +0530 Received: from ucmsshproxy.india.ext.ti.com (dbdp20.itg.ti.com [172.24.170.38]) by dbdp32.itg.ti.com (8.13.8/8.13.8) with SMTP id qA59TdWT021699; Mon, 5 Nov 2012 14:59:39 +0530 Received: from symphony.india.ext.ti.com (unknown [192.168.247.13]) by ucmsshproxy.india.ext.ti.com (Postfix) with ESMTP id E67C4158002; Mon, 5 Nov 2012 14:59:38 +0530 (IST) Received: from localhost.localdomain (linux-psp-server [192.168.247.76]) by symphony.india.ext.ti.com (8.11.7p1+Sun/8.11.7) with ESMTP id qA59Tc723260; Mon, 5 Nov 2012 14:59:38 +0530 (IST) From: "Philip, Avinash" To: , , , , Subject: [PATCH 4/8] pwm: pwm-tiecap: Add device-tree binding support for APWM driver Date: Mon, 5 Nov 2012 14:42:25 +0530 Message-ID: <1352106749-9437-5-git-send-email-avinashphilip@ti.com> X-Mailer: git-send-email 1.7.0.4 In-Reply-To: <1352106749-9437-1-git-send-email-avinashphilip@ti.com> References: <1352106749-9437-1-git-send-email-avinashphilip@ti.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20121105_042950_412276_514CF103 X-CRM114-Status: GOOD ( 19.65 ) X-Spam-Score: -4.6 (----) X-Spam-Report: SpamAssassin version 3.3.2 on merlin.infradead.org summary: Content analysis details: (-4.6 points) pts rule name description ---- ---------------------- -------------------------------------------------- -5.0 RCVD_IN_DNSWL_HI RBL: Sender listed at http://www.dnswl.org/, high trust [198.47.26.152 listed in list.dnswl.org] 3.0 KHOP_BIG_TO_CC Sent to 10+ recipients instaed of Bcc or a list -0.0 SPF_PASS SPF: sender matches SPF record -0.7 RP_MATCHES_RCVD Envelope sender domain matches handover relay domain -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] Cc: Rob Landley , linux-doc@vger.kernel.org, devicetree-discuss@lists.ozlabs.org, nsekhar@ti.com, linux-kernel@vger.kernel.org, hvaibhav@ti.com, gururaja.hebbar@ti.com, Grant Likely , Rob Herring , anilkumar@ti.com, linux-omap@vger.kernel.org, linux-arm-kernel@lists.infradead.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: linux-arm-kernel-bounces@lists.infradead.org Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org Add support for device-tree binding for ECAP APWM driver. Also size of #pwm-cells set to 3 to support PWM channel number, PWM period & polarity configuration from device tree. Also enable clock gating in PWM subsystem common config space. Also when here set .owner member in platform_driver structure to THIS_MODULE. Signed-off-by: Philip, Avinash Cc: Grant Likely Cc: Rob Herring Cc: Rob Landley --- Second version - Combined with HWMOD changes & DT bindings. - Remove the custom of_xlate support. :000000 100644 0000000... fe24cac... A Documentation/devicetree/bindings/pwm/pwm-tiecap.txt :100644 100644 d6d4cf0... 7ea5bea2.. M drivers/pwm/pwm-tiecap.c .../devicetree/bindings/pwm/pwm-tiecap.txt | 22 ++++++++++++ drivers/pwm/pwm-tiecap.c | 36 +++++++++++++++++++- 2 files changed, 57 insertions(+), 1 deletions(-) diff --git a/Documentation/devicetree/bindings/pwm/pwm-tiecap.txt b/Documentation/devicetree/bindings/pwm/pwm-tiecap.txt new file mode 100644 index 0000000..fe24cac --- /dev/null +++ b/Documentation/devicetree/bindings/pwm/pwm-tiecap.txt @@ -0,0 +1,22 @@ +TI SOC ECAP based APWM controller + +Required properties: +- compatible: Must be "ti,am33xx-ecap" +- #pwm-cells: Should be 3. Number of cells being used to specify PWM property. + First cell specifies the per-chip index of the PWM to use, the second + cell is the period cycle in nanoseconds and bit 0 in the third cell is + used to encode the polarity of PWM output. +- reg: physical base address and size of the registers map. + +Optional properties: +- ti,hwmods: Name of the hwmod associated to the ECAP: + "ecap", being the 0-based instance number from the HW spec + +Example: + +ecap0: ecap@0 { + compatible = "ti,am33xx-ecap"; + #pwm-cells = <3>; + reg = <0x48300100 0x80>; + ti,hwmods = "ecap0"; +}; diff --git a/drivers/pwm/pwm-tiecap.c b/drivers/pwm/pwm-tiecap.c index d6d4cf0..7ea5bea 100644 --- a/drivers/pwm/pwm-tiecap.c +++ b/drivers/pwm/pwm-tiecap.c @@ -25,6 +25,10 @@ #include #include #include +#include +#include + +#include "tipwmss.h" /* ECAP registers and bits definitions */ #define CAP1 0x08 @@ -37,6 +41,10 @@ #define ECCTL2_SYNC_SEL_DISA (BIT(7) | BIT(6)) #define ECCTL2_TSCTR_FREERUN BIT(4) +#define ECAPCLK_EN_SHIFT 0 + +#define PWM_CELL_SIZE 3 + struct ecap_pwm_chip { struct pwm_chip chip; unsigned int clk_rate; @@ -184,12 +192,27 @@ static const struct pwm_ops ecap_pwm_ops = { .owner = THIS_MODULE, }; +#ifdef CONFIG_OF +static const struct of_device_id ecap_of_match[] = { + { + .compatible = "ti,am33xx-ecap", + }, + {}, +}; +MODULE_DEVICE_TABLE(of, ecap_of_match); +#endif + static int __devinit ecap_pwm_probe(struct platform_device *pdev) { int ret; struct resource *r; struct clk *clk; struct ecap_pwm_chip *pc; + struct pinctrl *pinctrl; + + pinctrl = devm_pinctrl_get_select_default(&pdev->dev); + if (IS_ERR(pinctrl)) + dev_warn(&pdev->dev, "failed to configure pins from driver\n"); pc = devm_kzalloc(&pdev->dev, sizeof(*pc), GFP_KERNEL); if (!pc) { @@ -211,6 +234,7 @@ static int __devinit ecap_pwm_probe(struct platform_device *pdev) pc->chip.dev = &pdev->dev; pc->chip.ops = &ecap_pwm_ops; + pc->chip.of_pwm_n_cells = PWM_CELL_SIZE; pc->chip.base = -1; pc->chip.npwm = 1; @@ -231,6 +255,10 @@ static int __devinit ecap_pwm_probe(struct platform_device *pdev) } pm_runtime_enable(&pdev->dev); + pm_runtime_get_sync(&pdev->dev); + pwmss_submodule_state_change(pdev->dev.parent, ECAPCLK_EN_SHIFT, true); + pm_runtime_put_sync(&pdev->dev); + platform_set_drvdata(pdev, pc); return 0; } @@ -239,6 +267,10 @@ static int __devexit ecap_pwm_remove(struct platform_device *pdev) { struct ecap_pwm_chip *pc = platform_get_drvdata(pdev); + pm_runtime_get_sync(&pdev->dev); + pwmss_submodule_state_change(pdev->dev.parent, ECAPCLK_EN_SHIFT, false); + pm_runtime_put_sync(&pdev->dev); + pm_runtime_put_sync(&pdev->dev); pm_runtime_disable(&pdev->dev); return pwmchip_remove(&pc->chip); @@ -246,7 +278,9 @@ static int __devexit ecap_pwm_remove(struct platform_device *pdev) static struct platform_driver ecap_pwm_driver = { .driver = { - .name = "ecap", + .name = "ecap", + .owner = THIS_MODULE, + .of_match_table = of_match_ptr(ecap_of_match), }, .probe = ecap_pwm_probe, .remove = __devexit_p(ecap_pwm_remove),