From patchwork Fri Apr 22 18:30:06 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?J=2E_Neusch=C3=A4fer?= X-Patchwork-Id: 565063 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id A15F3C433FE for ; Fri, 22 Apr 2022 22:04:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231807AbiDVWHL (ORCPT ); Fri, 22 Apr 2022 18:07:11 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35150 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231637AbiDVWHE (ORCPT ); Fri, 22 Apr 2022 18:07:04 -0400 Received: from mout.gmx.net (mout.gmx.net [212.227.17.22]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4DE1F31DDC; Fri, 22 Apr 2022 13:52:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gmx.net; s=badeba3b8450; t=1650660721; bh=nH5nbmzHe/xRwz0pWDdjzn30b813GPDvATKACfo4I6g=; h=X-UI-Sender-Class:From:To:Cc:Subject:Date:In-Reply-To:References; b=eyIq38Ti8Xyoy7E0KkA29w0DkaRlW8dP8h5wyY9BNqYn3J9bSSzUP+PiTaibG9SWW ub/Uupa1SinGBG1AycTDetvFx9E3NVW1btY5UCZ0+WtMgR2lprvv76u7jqnf9PXAlo APJT4bkv9v2gXLwuJ7IC7ZKkhZzyEIufDZb39CVI= X-UI-Sender-Class: 01bb95c1-4bf8-414a-932a-4f6e2808ef9c Received: from longitude ([87.78.190.74]) by mail.gmx.net (mrgmx104 [212.227.17.168]) with ESMTPSA (Nemesis) id 1MGQnF-1nh6473Djx-00GnuC; Fri, 22 Apr 2022 20:31:46 +0200 From: =?utf-8?q?Jonathan_Neusch=C3=A4fer?= To: linux-clk@vger.kernel.org, openbmc@lists.ozlabs.org Cc: linux-kernel@vger.kernel.org, linux-watchdog@vger.kernel.org, devicetree@vger.kernel.org, =?utf-8?q?Jonathan_Neusch=C3=A4fer?= , Michael Turquette , Stephen Boyd , Rob Herring , Krzysztof Kozlowski , Avi Fishman , Tomer Maimon , Tali Perry , Patrick Venture , Nancy Yuen , Benjamin Fair , Daniel Lezcano , Thomas Gleixner , Philipp Zabel , Wim Van Sebroeck , Guenter Roeck Subject: [PATCH 1/7] dt-bindings: timer: nuvoton,npcm7xx-timer: Allow specifying all clocks Date: Fri, 22 Apr 2022 20:30:06 +0200 Message-Id: <20220422183012.444674-2-j.neuschaefer@gmx.net> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220422183012.444674-1-j.neuschaefer@gmx.net> References: <20220422183012.444674-1-j.neuschaefer@gmx.net> MIME-Version: 1.0 X-Provags-ID: V03:K1:lnBh/Tpvgmu7+wHhf+H5KmdyA2JGqflwIdExxJyori80ywRZSGg flOvQpXx/6FTotPushCAlRjkrTtc6+4Al0ktSv+PUZ0hpSYy2O5QKr8ZpiSt5c26UcjQFfW MAWFL4Hz8F9vQWjXrGC1jMgB2bGBiqgY4p203hrVJHH/jNtRhzgk4N0vl6J4PqBB2kLE79S VYINyKnXBIFnjHKOVSF+g== X-UI-Out-Filterresults: notjunk:1;V03:K0:GH6IMDgDjVk=:zwNWdBjXT58bbmqMOK1ZyH eKVkZYuRPsrGXFJR11x2HGexmFcrG5npjb3hw1G81xS9+G68DLMvyuSJV4bJk3zuLcYVJqa1M JWCQfcfDk5UKkQ1rlenE34gpA7hztwRAbHJ3iV6js3KyzuDVsz7Xo8zK/L+L4Yi0F085xgL+o PCIGn+niJIKUgnUVAwQKaQOF7iMw9eTwkXwpmnLbOjTqD5eJ5aG1UDFcRwINNWUvcvI5O4cda FQUNnGTdL7ujQZfXVbbM0ZBbIDcDFeIdagpMtfYnq0h+zFg8PJZCOlhXMwVdT6ULcVnprY1UJ n9mFbqmetOirWzDWemHEOkTuSHZQn2h6rEShW8mtcEW/nVfKJPcy4FF5BtIidgV33NM6mm8A+ HWaHmQUaszJdqIepItfxN51b9DovnEQJd8AU8r4F2m9W8TQYAMToGJq0RoC/wG+Qi+iq0q/8E 7L+7jniWOs5WQJj1+KSh+kuXBI8o60eik0JBj2P/bYnPGx6z7TzbU3u5mD1m0eknZ7YbQKvRX s6Qq7qwu3VdY3zwYawvsipVz9/hbIhNvnDjTHZIKK9021lvFY89Y3dXQ25/yJzSUyP/h6vqAC mLWNBcsefhfoCOf9EMY7Y1iHQRXaNOLMcDomv1Gyb2d+IzEBcAXNewrk7kZA4RPMlnF+ydcF0 uH9kNHGGrDq+QvsnKHjBZWQxvezef3FAaaap6IRxvIKEeoDaNWDkMUCY/5bQPd5gF45Q9Nxtq bTPPVTzxFfMC5IkLZt3dGT+Vk5g6/FZ6r2Md5bslCrwrI9K6x5mQVeWdZVfnfEaGf/iLPNVuq FHTow+h+Ja7faVEPIx8RBs0/dP7YTJttdutvqRV1pNbPZp2FRYYC8g4Yv11aWbFNKS8X82J/F AbdPHOZSjmZ2I6JKMpkNbmZ8BIU3SisXUpxy2UqgVlrc3oVBR+87o8v+DQAX2Fv2QenHhXDu3 QdDCeqGp3hOCaon8nS6Fx4843UHajRwjuzgvPIqr5Atg1Hgt07zD4FqllQMD+y/9T0Rmf/6Y0 k5EC7jZo/XUQXoyyEyQ+Mpit8AG9G6ArfHdlYaDKkfSa5ZtaKLXdUEMTQY/i3vNI1kTulkD9T DSKFokWsM0Uosw= Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org The timer module contains multiple timers. In the WPCM450 SoC, each timer runs off a clock can be gated individually. To model this correctly, the timer node in the devicetree needs to take multiple clock inputs. Signed-off-by: Jonathan Neuschäfer --- .../devicetree/bindings/timer/nuvoton,npcm7xx-timer.yaml | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) -- 2.35.1 diff --git a/Documentation/devicetree/bindings/timer/nuvoton,npcm7xx-timer.yaml b/Documentation/devicetree/bindings/timer/nuvoton,npcm7xx-timer.yaml index 0cbc26a721514..023c999113c38 100644 --- a/Documentation/devicetree/bindings/timer/nuvoton,npcm7xx-timer.yaml +++ b/Documentation/devicetree/bindings/timer/nuvoton,npcm7xx-timer.yaml @@ -23,7 +23,13 @@ properties: - description: The timer interrupt of timer 0 clocks: - maxItems: 1 + items: + - description: The reference clock for timer 0 + - description: The reference clock for timer 1 + - description: The reference clock for timer 2 + - description: The reference clock for timer 3 + - description: The reference clock for timer 4 + minItems: 1 required: - compatible From patchwork Fri Apr 22 18:30:07 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?J=2E_Neusch=C3=A4fer?= X-Patchwork-Id: 565047 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6A7C7C4332F for ; Fri, 22 Apr 2022 22:40:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233778AbiDVWn2 (ORCPT ); Fri, 22 Apr 2022 18:43:28 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51180 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234301AbiDVWnF (ORCPT ); Fri, 22 Apr 2022 18:43:05 -0400 Received: from mout.gmx.net (mout.gmx.net [212.227.15.18]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4F1661773D8; Fri, 22 Apr 2022 14:42:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gmx.net; s=badeba3b8450; t=1650663731; bh=XAbU/WwnBQTi9/OidcyFLjRJfgJl6FaI1cL4Ta59NpE=; h=X-UI-Sender-Class:From:To:Cc:Subject:Date:In-Reply-To:References; b=F2yNof3X8y8hvi/Y8+FiTX2CnlA5T8zdkgbIAfDQXmoXufJ1VUZ41pI81mlXiMINO 4flm5ao9FuutFjMtZIDCH5n37U0YdMUGXRuI44iyVJFpJjwgQMTU3WlkAmf1ecp2mV w9OV7B5Bl8yNmQaJmg3FrKvwvt+Xi3dV6OGkjmGo= X-UI-Sender-Class: 01bb95c1-4bf8-414a-932a-4f6e2808ef9c Received: from longitude ([87.78.190.74]) by mail.gmx.net (mrgmx004 [212.227.17.190]) with ESMTPSA (Nemesis) id 1MxlzI-1o6V013bxO-00zIaz; Fri, 22 Apr 2022 20:31:47 +0200 From: =?utf-8?q?Jonathan_Neusch=C3=A4fer?= To: linux-clk@vger.kernel.org, openbmc@lists.ozlabs.org Cc: linux-kernel@vger.kernel.org, linux-watchdog@vger.kernel.org, devicetree@vger.kernel.org, =?utf-8?q?Jonathan_Neusch=C3=A4fer?= , Michael Turquette , Stephen Boyd , Rob Herring , Krzysztof Kozlowski , Avi Fishman , Tomer Maimon , Tali Perry , Patrick Venture , Nancy Yuen , Benjamin Fair , Daniel Lezcano , Thomas Gleixner , Philipp Zabel , Wim Van Sebroeck , Guenter Roeck Subject: [PATCH 2/7] clocksource: timer-npcm7xx: Enable timer 1 clock before use Date: Fri, 22 Apr 2022 20:30:07 +0200 Message-Id: <20220422183012.444674-3-j.neuschaefer@gmx.net> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220422183012.444674-1-j.neuschaefer@gmx.net> References: <20220422183012.444674-1-j.neuschaefer@gmx.net> MIME-Version: 1.0 X-Provags-ID: V03:K1:uovlBSQszsD4TcZ6IjORpDv2zAitS8WCPXKi91TdybsXvyz7lqO rC2FC41F/kJUCpFHd1VviHlqQLLBrFbdETf+eE8nbVimOfnWkBZ30HFJmtlAYF1Jwirim+1 uMWQPfc4mPu19lplwt6TaEE58ze9BYNz5EI1+XTE1tlzCw3t9XOIahvNn5e/tYf/l/wShmM vpo+JqSHVFco1wj+MDB2Q== X-UI-Out-Filterresults: notjunk:1;V03:K0:g0eDA97AGZw=:Ng7MfKtb6I8godEPVk0G2X seOnAGfWoJs+65+HIlee2xyPeWz5f0C50jvK+jtsUd0ANNNqPIYae7byOZJzrhw/P55iv2A2F P1Hr9je1/eAaBX1VPuCOTBA1kzRjTRs72oX2yTHFZYzEl2VFPkCCGuvkcqtfdcjF9sD/PyVl6 VvoxtkiaRH1IoBCthl603M32eWHgl3urURApkzqdAtLde37y6fFrqEdxaDtgRZsjrP64FxZ5M fCepuoUdV1cuZgByc3FjkUXUkRVMjVgz38GbOtizIt7txRL7aaw9bFo7I/xNNYgulEK97c6tT 11B13KqDQwIQmsSRuaVXMUkgcL2rY/W+gjpy5Dy8GQRhpkqbirxyCGMJMWn0Cs1lvOfXrznoX f0RhFAE2ak78U9ga48bwQNGQB9tPzDzj74AC18tLfB5DHqZgHUBpyyef+ru96vlSVbDtErzkb cuYvmDj7KLnj2QcaAEZKIQcLw8dg9/227oGn/S/ReCCUBYEh9G3fFLWVxKx5Os4wAsu3AKdt2 HGnX3Md10TYRJ/pujlic6Fvq2nRjbaY2kdA/u3WGTT3489sd3vUcfXN2Uy9A0r1FJCbmPan+a P0cfQNBhbmTzNUzR40OjhhK45J50yU5ZsWV0efr8kNJjM9ITixrcrIviNHwRaWCUTBPJuCReX Yz3oZ/O5Pt/ujDvI0qRz58POYsPx1rH12opNEPq+txF1b7ufi116464AFhaVHsv/3FpCmw1jf Y3tU5O9FkcXEpfWuA1KqGT/dXKNo0+IHzFfCOWtY4CnRHKA9RMaXfbghDs8j6hZcDzvsahLFD 7PM4V244nG7aLR5akwg+rkGBxz9NcKCyt0+OyOqz/fSAj/hsA5IYqm9INJTQNBm9waKiDPsmn wvxXdyKCDt8Y4V+d51d1L4qQLPjUeSiibWIiYEMK2RoLqr6Vfk0hmXzCldxIhNISVwUhYRKEg 9euzmV1wP09AFhbQTGmvGoozwj4u+nPxezt28YhzIDvcp/mnFifVrWaiHAcll7tQgIS7aKgyQ D3PvycgMCJDuUa3fejgAUbFyqOxDH9nYkKw6GlvpbbP+PziKq4+xNS3NhGbo+3gSQt7I1GaAk PxEk+FY3lJ//Mw= Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org In the WPCM450 SoC, the clocks for each timer can be gated individually. To prevent the timer 1 clock from being gated, enable it explicitly. Signed-off-by: Jonathan Neuschäfer --- drivers/clocksource/timer-npcm7xx.c | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-) -- 2.35.1 diff --git a/drivers/clocksource/timer-npcm7xx.c b/drivers/clocksource/timer-npcm7xx.c index a00520cbb660a..974269b6b0c36 100644 --- a/drivers/clocksource/timer-npcm7xx.c +++ b/drivers/clocksource/timer-npcm7xx.c @@ -188,17 +188,29 @@ static void __init npcm7xx_clocksource_init(void) static int __init npcm7xx_timer_init(struct device_node *np) { + struct clk *clk; int ret; ret = timer_of_init(np, &npcm7xx_to); - if (ret) + if (ret) { + pr_warn("timer_of_init failed: %d\n", ret); return ret; + } /* Clock input is divided by PRESCALE + 1 before it is fed */ /* to the counter */ npcm7xx_to.of_clk.rate = npcm7xx_to.of_clk.rate / (NPCM7XX_Tx_MIN_PRESCALE + 1); + /* Enable the clock for timer1, if it exists */ + clk = of_clk_get(np, 1); + if (clk) { + if (!IS_ERR(clk)) + clk_prepare_enable(clk); + else + pr_warn("Failed to get clock for timer1: %pe", clk); + } + npcm7xx_clocksource_init(); npcm7xx_clockevents_init(); From patchwork Fri Apr 22 18:30:10 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?J=2E_Neusch=C3=A4fer?= X-Patchwork-Id: 565048 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5C1BEC4332F for ; Fri, 22 Apr 2022 22:36:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233791AbiDVWjL (ORCPT ); Fri, 22 Apr 2022 18:39:11 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50118 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234437AbiDVWiR (ORCPT ); Fri, 22 Apr 2022 18:38:17 -0400 Received: from mout.gmx.net (mout.gmx.net [212.227.17.21]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2E67C200389; Fri, 22 Apr 2022 14:30:23 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gmx.net; s=badeba3b8450; t=1650663022; bh=BHUkq4qIz1dh922+/iqR/+zEXRIaC4ZyZF4Bphn8Po8=; h=X-UI-Sender-Class:From:To:Cc:Subject:Date:In-Reply-To:References; b=EXay7kgGE8SkMAk7JaTrpqsmjmE+KTqTL3U60OahfcTP4a0uhZGt1TALutDYVF3im M/dCpgzDLEepZkFvF89gCdMzhB7ac4NIR/nuWleWMud/8uWT2N1OdDKDdZ24UdzTND Agi3x+W+yvHXOI3DRqZbvc1rgIezKKwRa4KtuWPs= X-UI-Sender-Class: 01bb95c1-4bf8-414a-932a-4f6e2808ef9c Received: from longitude ([87.78.190.74]) by mail.gmx.net (mrgmx105 [212.227.17.168]) with ESMTPSA (Nemesis) id 1N8ofO-1nvSO519eg-015ujL; Fri, 22 Apr 2022 20:31:55 +0200 From: =?utf-8?q?Jonathan_Neusch=C3=A4fer?= To: linux-clk@vger.kernel.org, openbmc@lists.ozlabs.org Cc: linux-kernel@vger.kernel.org, linux-watchdog@vger.kernel.org, devicetree@vger.kernel.org, =?utf-8?q?Jonathan_Neusch=C3=A4fer?= , Michael Turquette , Stephen Boyd , Rob Herring , Krzysztof Kozlowski , Avi Fishman , Tomer Maimon , Tali Perry , Patrick Venture , Nancy Yuen , Benjamin Fair , Daniel Lezcano , Thomas Gleixner , Philipp Zabel , Wim Van Sebroeck , Guenter Roeck Subject: [PATCH 5/7] ARM: dts: wpcm450: Add clock controller node Date: Fri, 22 Apr 2022 20:30:10 +0200 Message-Id: <20220422183012.444674-6-j.neuschaefer@gmx.net> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220422183012.444674-1-j.neuschaefer@gmx.net> References: <20220422183012.444674-1-j.neuschaefer@gmx.net> MIME-Version: 1.0 X-Provags-ID: V03:K1:Fag6c+9a1Pz3T5xG3Pe4SmIRM1zshVKs/bhtGtFRhEqmEKmvImL mQiew5bwtAn5jmH7DaPyUusvR9/woaryKVpQFAXUKgw39r3F9k9/a1u2LQItUrXdsy7diry CBT1J59AfeqO/3Z6yii0UgOL51/2BFCdmCC74iM+zjFRl7g/SRd0Lu5Q5I0YJ4tANpkLGDo PYSdA+hdkEp96fsM9/7sw== X-UI-Out-Filterresults: notjunk:1;V03:K0:IHgVYjueDIk=:s19Olf0VBPcmGPERNqaAVP TIOWAFRCJ8h1zX3LmbH8ZStBHDP6P9A5eQhP0ofSiugsP6jIVRCLO8XSlS6TkrTZNKvhaLg+Y l3o2Uw5FF+BiEH4ITCaIkibSAAw3yYvsmBeEVhI968R+qU+j9jemDR8uiXPckM6NFLlFG3MAA //3Vkn/yzDI+S/DuzZwc4m/fSRP+2u+UhapM3X/x049NPxHSkiKu7Fh0mueR1t73aFB3MqSeU GJMIl3QD9eYoPieeluQDBN3OK/0o5YTLLeJyOrFJLmOGPVANCkGgqyuiY8kxs0yUAo3CYH310 YISle7JZrIyFsKumD7yMJwq1DCcT9+BKojeTsB1kLGIfNIrhpEj9bJAEYZrMi4yFhfIr+MuuI oGC7OW38CccejsUeblq3l6NtVKZZGEAk3UXxla3VXvcEOrzM816Y/3YHc18+YQFLVwfym/Rs6 HpfcVHsbxMIRnekokDxudI2DP2FZbSsMA7xtr7SkkFrZowFAwaTQ8p2TOBmk0zC/iq5KbO5Y2 B91g/xGxfwmhLJJlfHpUjcoIij9CJrmWE0jOPVVktEgdGEoXFbA1ac67XnVeR/SrX/4uFZrob M199YNDpY5+S2cDOf0LRmhL6spD/JnMzvcfaEu2Sg3Fp8Fa+uul9rFFDhAeaNT/23jcmtjwMW Zo1zEe9o8swvO7N3pQTF1PZ2R6K4gxjYouhqdV7DJLsyauGhM7Mq+wdRH8rTk610Aso3QbTiQ HwSYs628upNHfP0XUwISxTcddajIdD53mgG8fgFZBKzt21QSfEDTI9swvdN2Oz4WWaElbqF6E L9fbql54Lgwr8/NXZiYsyHbZDTRoY4Bv1c7TE7ZvHo1RSPL5/Pfp1Y25wggRhQ8r+J3i26fe9 Vv+YrLmcvWdfZrrSlui3Z1+SOYosJuorgnTGoBDmJLf2J6TVA8hXRNBVx7L0dWxh0yyGqKvhD QDvvT0otLfKlDfcTjrwYS9Nm73804oL+q7n4v+JhNmqdDbG2O1rdGJj+qDuyTokLdmwVCoi9S RSWbkjlIiwj7PvZR83cBPpgFFVTjIFdAVO36ZXoSfQbHbtQJeMDAM+IwJ/uSrTbWysAcEpG4d J+80VCwdWTBYn4= Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org This declares the clock controller and the necessary 48 Mhz reference clock in the WPCM450 device. Switching devices over to the clock controller is intentionally done in a separate patch to give time for the clock controller driver to land. Signed-off-by: Jonathan Neuschäfer --- arch/arm/boot/dts/nuvoton-wpcm450.dtsi | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) -- 2.35.1 diff --git a/arch/arm/boot/dts/nuvoton-wpcm450.dtsi b/arch/arm/boot/dts/nuvoton-wpcm450.dtsi index 1c63ab14c4383..62d70fda7b520 100644 --- a/arch/arm/boot/dts/nuvoton-wpcm450.dtsi +++ b/arch/arm/boot/dts/nuvoton-wpcm450.dtsi @@ -39,6 +39,14 @@ clk24m: clock-24mhz { #clock-cells = <0>; }; + refclk: clock-48mhz { + /* 48 MHz reference oscillator */ + compatible = "fixed-clock"; + clock-output-names = "refclk"; + clock-frequency = <48000000>; + #clock-cells = <0>; + }; + soc { compatible = "simple-bus"; #address-cells = <1>; @@ -51,6 +59,15 @@ gcr: syscon@b0000000 { reg = <0xb0000000 0x200>; }; + clk: clock-controller@b0000200 { + compatible = "nuvoton,wpcm450-clk"; + reg = <0xb0000200 0x100>; + clocks = <&refclk>; + clock-names = "refclk"; + #clock-cells = <1>; + #reset-cells = <1>; + }; + serial0: serial@b8000000 { compatible = "nuvoton,wpcm450-uart"; reg = <0xb8000000 0x20>; From patchwork Fri Apr 22 18:30:11 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?J=2E_Neusch=C3=A4fer?= X-Patchwork-Id: 565064 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4456CC4167E for ; Fri, 22 Apr 2022 22:04:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231473AbiDVWG5 (ORCPT ); Fri, 22 Apr 2022 18:06:57 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36152 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231588AbiDVWGs (ORCPT ); Fri, 22 Apr 2022 18:06:48 -0400 Received: from mout.gmx.net (mout.gmx.net [212.227.17.22]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 783D5206C03; Fri, 22 Apr 2022 13:51:01 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gmx.net; s=badeba3b8450; t=1650660659; bh=Z7teJIYqUSq12c5uTIxh9gTwy/vvO4uUbKqt8v51mdE=; h=X-UI-Sender-Class:From:To:Cc:Subject:Date:In-Reply-To:References; b=OvWLtOOBjfujeEkSJis3vOOdwDTmnKoNv2hn1HSvvaH9OQBGSdC4nStXSjLqOTEov b+/R2tEEwKWiuDhEUOwjOnh8wC37LzF1qY//4TLt8Y+3rhq3SplQLpsUJ7NTSe0ino xuoQqdLf3yTnn3+JAeb6zBMHMsbGnh/2UVKch/Hs= X-UI-Sender-Class: 01bb95c1-4bf8-414a-932a-4f6e2808ef9c Received: from longitude ([87.78.190.74]) by mail.gmx.net (mrgmx105 [212.227.17.168]) with ESMTPSA (Nemesis) id 1MBUm7-1ncANu1Qv1-00Cxwe; Fri, 22 Apr 2022 20:31:57 +0200 From: =?utf-8?q?Jonathan_Neusch=C3=A4fer?= To: linux-clk@vger.kernel.org, openbmc@lists.ozlabs.org Cc: linux-kernel@vger.kernel.org, linux-watchdog@vger.kernel.org, devicetree@vger.kernel.org, =?utf-8?q?Jonathan_Neusch=C3=A4fer?= , Michael Turquette , Stephen Boyd , Rob Herring , Krzysztof Kozlowski , Avi Fishman , Tomer Maimon , Tali Perry , Patrick Venture , Nancy Yuen , Benjamin Fair , Daniel Lezcano , Thomas Gleixner , Philipp Zabel , Wim Van Sebroeck , Guenter Roeck Subject: [PATCH 6/7] clk: wpcm450: Add Nuvoton WPCM450 clock/reset controller driver Date: Fri, 22 Apr 2022 20:30:11 +0200 Message-Id: <20220422183012.444674-7-j.neuschaefer@gmx.net> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220422183012.444674-1-j.neuschaefer@gmx.net> References: <20220422183012.444674-1-j.neuschaefer@gmx.net> MIME-Version: 1.0 X-Provags-ID: V03:K1:gaCx0O9WDw+rwOFW3kkbLxaWxszoxkpE9hactbEFpdSE8StJcBX NsHfbRfFTuk6t2QdKLJXiFocCpwubMjU/Hfmb/gVwljXLT+BVvvVan3Snsh4sB7B0ZOf5Z6 RmVpMVnQ/aPMoGqQqb4yhNelNZTqSt88FZjFUuGMFq3ghJmbYFBr55CPSoOdSB1xh3+z+5p q528vyuc6nBZ3/yyf3mQw== X-UI-Out-Filterresults: notjunk:1;V03:K0:roVyZI3Q6bc=:JHaqzL3zaUv4ZKeLDNSFop /tX4cz6NQ//MHcpIODoNdVGttiHfINLZzgZERabeiEWzHtzel+Vv65h+6qjICMcH2pSYfB5sx iaScmhLdYKJ0AsJPrYFisc6jlKtENh8OBVw1yKlJD/lBMyU8JcoTCHwUXcz9BA3E6sJu2neZl XL6lYei50oJDqLf8WNCruMqqgT1vDLQ4WULtaN7D6a32DMIGOHFAXnTMbDNbd3zrmUDW1aJAf qmUOCL82JtmBJGKaRCvB5SNDCpD9Y1nsZbdBavzZbV3s90VuWWsLhgKgc7XDZjZr36QJvnNWD BQU37Ky6MpaRq9dkpmASTrseBRNdpxyGbsFqivlNhrmblJ2Ep1/zkhpcl71yFM0yRbvA5s2Oo MTFO8mzI/cHM1JnGxVljG1Fe5EvFLiJ1s1udQkq0+OQihZP39veRiA1hfuJ7ciUacSuFey2tx blfbUvHKaPQ108DfztVXcNUBNhOmr69GDWhjm315KaXUr4fu4qj3/3pdWCA8h2P4eCl4Z7c8c UjdjYTA1GFmIrz0pbqNnxikgsSAJVuPiblhDjs3uOfvCeV/w1kEBz+Z0CprUHNxeQwWy5P1lr L7R8N3DG70nzrDLVDjjLwElLJt5fH0cYw2sbICLwDlvJVhmQcYDKuEHmrYcCKZm/J+RNNZF38 YbX4iP/ixzznVzJU9Msm/8g/3KR7dzJlp6FQzffALpG2rkCU3fY8Ukppra7/69TbcqPO4oFiM 53+TM/vbPMrtXkiwAmJQ0ZFmj3e+o8AKstSHaOZk7nnrvi2Za/zcopoSHI58fxsBSbGtkCuAc 0XFIV4tJh9rUYguVX69Y3bF63coASzxlnzea5XvLj+SzwW0SAZQY1gwxUm+WxRpK/fBViY5Qt V3l/Lh1qQXZIxq8zmpDKbY3qIUZJbAWdM3CtdbbIJH/UcqgzczT0W4aaD11ziV4AfUkXWd0+I hspe8niDNccnIIxSiPylb5GPIAeTkkHWzQzKFXZM2QM80d461JjFgYFkAv1/0BjXJnHQ8scRe qa4upSZXRRk7+OO4jNylNOpIxe629erTiehJ5HR1kbBT63X4qBNtcPVHpYYGUluAX6S5j71jP DKVY4iW+7O4voI= Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org This driver implements the following features w.r.t. the clock and reset controller in the WPCM450 SoC: - It calculates the rates for all clocks managed by the clock controller - It leaves the clock tree mostly unchanged, except that it enables/ disables clock gates based on usage. - It exposes the reset lines managed by the controller using the Generic Reset Controller subsystem NOTE: If the driver and the corresponding devicetree node are present, the driver will disable "unused" clocks. This is problem until the clock relations are properly declared in the devicetree (in a later patch). Until then, the clk_ignore_unused kernel parameter can be used as a workaround. Signed-off-by: Jonathan Neuschäfer --- drivers/clk/Makefile | 1 + drivers/clk/clk-wpcm450.c | 378 ++++++++++++++++++++++++++++++++++++++ drivers/reset/Kconfig | 2 +- 3 files changed, 380 insertions(+), 1 deletion(-) create mode 100644 drivers/clk/clk-wpcm450.c -- 2.35.1 diff --git a/drivers/clk/Makefile b/drivers/clk/Makefile index 2bd5ffd595bf3..07edb0f4ba8ba 100644 --- a/drivers/clk/Makefile +++ b/drivers/clk/Makefile @@ -73,6 +73,7 @@ obj-$(CONFIG_ARCH_VT8500) += clk-vt8500.o obj-$(CONFIG_COMMON_CLK_RS9_PCIE) += clk-renesas-pcie.o obj-$(CONFIG_COMMON_CLK_VC5) += clk-versaclock5.o obj-$(CONFIG_COMMON_CLK_WM831X) += clk-wm831x.o +obj-$(CONFIG_ARCH_WPCM450) += clk-wpcm450.o obj-$(CONFIG_COMMON_CLK_XGENE) += clk-xgene.o # please keep this section sorted lexicographically by directory path name diff --git a/drivers/clk/clk-wpcm450.c b/drivers/clk/clk-wpcm450.c new file mode 100644 index 0000000000000..3b62b5961d5f0 --- /dev/null +++ b/drivers/clk/clk-wpcm450.c @@ -0,0 +1,378 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Nuvoton WPCM450 clock and reset controller driver. + * + * Copyright (C) 2022 Jonathan Neuschäfer + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include + +struct wpcm450_clk_pll { + struct clk_hw hw; + void __iomem *pllcon; + u8 flags; +}; + +#define to_wpcm450_clk_pll(_hw) container_of(_hw, struct wpcm450_clk_pll, hw) + +#define PLLCON_FBDV GENMASK(24, 16) +#define PLLCON_PRST BIT(13) +#define PLLCON_PWDEN BIT(12) +#define PLLCON_OTDV GENMASK(10, 8) +#define PLLCON_INDV GENMASK(5, 0) + +static unsigned long wpcm450_clk_pll_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + struct wpcm450_clk_pll *pll = to_wpcm450_clk_pll(hw); + unsigned long fbdv, indv, otdv; + u64 rate; + u32 pllcon; + + if (parent_rate == 0) { + pr_err("%s: parent rate is zero", __func__); + return 0; + } + + pllcon = readl_relaxed(pll->pllcon); + + indv = FIELD_GET(PLLCON_INDV, pllcon) + 1; + fbdv = FIELD_GET(PLLCON_FBDV, pllcon) + 1; + otdv = FIELD_GET(PLLCON_OTDV, pllcon) + 1; + + rate = (u64)parent_rate * fbdv; + do_div(rate, indv * otdv); + + return rate; +} + +static int wpcm450_clk_pll_is_enabled(struct clk_hw *hw) +{ + struct wpcm450_clk_pll *pll = to_wpcm450_clk_pll(hw); + u32 pllcon; + + pllcon = readl_relaxed(pll->pllcon); + + return !(pllcon & PLLCON_PRST); +} + +static void wpcm450_clk_pll_disable(struct clk_hw *hw) +{ + struct wpcm450_clk_pll *pll = to_wpcm450_clk_pll(hw); + u32 pllcon; + + pllcon = readl_relaxed(pll->pllcon); + pllcon |= PLLCON_PRST | PLLCON_PWDEN; + writel(pllcon, pll->pllcon); +} + +static const struct clk_ops wpcm450_clk_pll_ops = { + .recalc_rate = wpcm450_clk_pll_recalc_rate, + .is_enabled = wpcm450_clk_pll_is_enabled, + .disable = wpcm450_clk_pll_disable +}; + +static struct clk_hw * +wpcm450_clk_register_pll(void __iomem *pllcon, const char *name, + const char *parent_name, unsigned long flags) +{ + struct wpcm450_clk_pll *pll; + struct clk_init_data init; + struct clk_hw *hw; + int ret; + + pll = kzalloc(sizeof(*pll), GFP_KERNEL); + if (!pll) + return ERR_PTR(-ENOMEM); + + init.name = name; + init.ops = &wpcm450_clk_pll_ops; + init.parent_names = &parent_name; + init.num_parents = 1; + init.flags = flags; + + pll->pllcon = pllcon; + pll->hw.init = &init; + + ret = clk_hw_register(NULL, &pll->hw); + if (ret) { + kfree(pll); + hw = ERR_PTR(ret); + } + + return &pll->hw; +} + +#define REG_CLKEN 0x00 +#define REG_CLKSEL 0x04 +#define REG_CLKDIV 0x08 +#define REG_PLLCON0 0x0c +#define REG_PLLCON1 0x10 +#define REG_PMCON 0x14 +#define REG_IRQWAKECON 0x18 +#define REG_IRQWAKEFLAG 0x1c +#define REG_IPSRST 0x20 + +struct wpcm450_pll_data { + const char *name; + const char *parent_name; + unsigned int reg; + unsigned long flags; +}; + +static const struct wpcm450_pll_data pll_data[] = { + { "pll0", "refclk", REG_PLLCON0, 0 }, + { "pll1", "refclk", REG_PLLCON1, 0 }, +}; + +struct wpcm450_clksel_data { + const char *name; + const char *const *parent_names; + unsigned int num_parents; + const u32 *table; + int shift; + int width; + int index; + unsigned long flags; +}; + +static const u32 parent_table[] = { 0, 1, 2 }; +static const char *const default_parents[] = { "pll0", "pll1", "refclk" }; +static const char *const huart_parents[] = { "refclk", "refdiv2" }; + +static const struct wpcm450_clksel_data clksel_data[] = { + { "cpusel", default_parents, ARRAY_SIZE(default_parents), + parent_table, 0, 2, -1, CLK_IS_CRITICAL }, + { "clkout", default_parents, ARRAY_SIZE(default_parents), + parent_table, 2, 2, -1, 0 }, + { "usbphy", default_parents, ARRAY_SIZE(default_parents), + parent_table, 6, 2, -1, 0 }, + { "uartsel", default_parents, ARRAY_SIZE(default_parents), + parent_table, 8, 2, WPCM450_CLK_USBPHY, 0 }, + { "huartsel", huart_parents, ARRAY_SIZE(huart_parents), + parent_table, 10, 1, -1, 0 }, +}; + +static const struct clk_div_table div_default[] = { + { .val = 0, .div = 1, }, + { .val = 1, .div = 2, }, + { .val = 2, .div = 4, }, + { .val = 3, .div = 8, }, + { } +}; + +static const struct clk_div_table div_ahb[] = { + { .val = 0, .div = 1, }, + { .val = 1, .div = 2, }, + { } +}; + +static const struct clk_div_table div_fixed2[] = { + { .val = 0, .div = 2 }, + { } +}; + +struct wpcm450_clkdiv_data { + const char *name; + const char *parent_name; + int div_flags; + const struct clk_div_table *table; + int shift; + int width; + unsigned long flags; +}; + +static struct wpcm450_clkdiv_data clkdiv_data_early[] = { + { "refdiv2", "refclk", 0, div_fixed2, 0, 0 }, +}; + +static const struct wpcm450_clkdiv_data clkdiv_data[] = { + { "cpu", "cpusel", 0, div_fixed2, 0, 0, CLK_IS_CRITICAL }, + { "adcdiv", "refclk", CLK_DIVIDER_POWER_OF_TWO, NULL, 28, 2, 0 }, + { "apb", "ahb", CLK_DIVIDER_POWER_OF_TWO, NULL, 26, 2, 0 }, + { "ahb", "cpu", CLK_DIVIDER_POWER_OF_TWO, NULL, 24, 2, 0 }, + { "uart", "uartsel", 0, NULL, 16, 4, 0 }, + { "ahb3", "ahb", CLK_DIVIDER_POWER_OF_TWO, NULL, 8, 2, 0 }, +}; + +struct wpcm450_clken_data { + const char *name; + const char *parent_name; + int bitnum; + unsigned long flags; +}; + +static const struct wpcm450_clken_data clken_data[] = { + { "fiu", "ahb3", WPCM450_CLK_FIU, 0 }, + { "xbus", "ahb3", WPCM450_CLK_XBUS, 0 }, + { "kcs", "apb", WPCM450_CLK_KCS, 0 }, + { "shm", "ahb3", WPCM450_CLK_SHM, 0 }, + { "usb1", "ahb", WPCM450_CLK_USB1, 0 }, + { "emc0", "ahb", WPCM450_CLK_EMC0, 0 }, + { "emc1", "ahb", WPCM450_CLK_EMC1, 0 }, + { "usb0", "ahb", WPCM450_CLK_USB0, 0 }, + { "peci", "apb", WPCM450_CLK_PECI, 0 }, + { "aes", "apb", WPCM450_CLK_AES, 0 }, + { "uart0", "uart", WPCM450_CLK_UART0, 0 }, + { "uart1", "uart", WPCM450_CLK_UART1, 0 }, + { "smb2", "apb", WPCM450_CLK_SMB2, 0 }, + { "smb3", "apb", WPCM450_CLK_SMB3, 0 }, + { "smb4", "apb", WPCM450_CLK_SMB4, 0 }, + { "smb5", "apb", WPCM450_CLK_SMB5, 0 }, + { "huart", "huartsel", WPCM450_CLK_HUART, 0 }, + { "pwm", "apb", WPCM450_CLK_PWM, 0 }, + { "timer0", "refdiv2", WPCM450_CLK_TIMER0, 0 }, + { "timer1", "refdiv2", WPCM450_CLK_TIMER1, 0 }, + { "timer2", "refdiv2", WPCM450_CLK_TIMER2, 0 }, + { "timer3", "refdiv2", WPCM450_CLK_TIMER3, 0 }, + { "timer4", "refdiv2", WPCM450_CLK_TIMER4, 0 }, + { "mft0", "apb", WPCM450_CLK_MFT0, 0 }, + { "mft1", "apb", WPCM450_CLK_MFT1, 0 }, + { "wdt", "refdiv2", WPCM450_CLK_WDT, 0 }, + { "adc", "adcdiv", WPCM450_CLK_ADC, 0 }, + { "sdio", "ahb", WPCM450_CLK_SDIO, 0 }, + { "sspi", "apb", WPCM450_CLK_SSPI, 0 }, + { "smb0", "apb", WPCM450_CLK_SMB0, 0 }, + { "smb1", "apb", WPCM450_CLK_SMB1, 0 }, +}; + +static DEFINE_SPINLOCK(wpcm450_clk_lock); + +static void __init wpcm450_clk_init(struct device_node *clk_np) +{ + struct clk_hw_onecell_data *clk_data; + static struct clk_hw **hws; + static struct clk_hw *hw; + void __iomem *clk_base; + int i, ret; + struct reset_controller_dev *rcdev; + + clk_base = of_iomap(clk_np, 0); + if (!clk_base) { + pr_err("%pOFP: failed to map registers\n", clk_np); + of_node_put(clk_np); + return; + } + of_node_put(clk_np); + + clk_data = kzalloc(struct_size(clk_data, hws, WPCM450_NUM_CLKS), GFP_KERNEL); + if (!clk_data) + goto err_unmap; + + clk_data->num = WPCM450_NUM_CLKS; + hws = clk_data->hws; + + for (i = 0; i < WPCM450_NUM_CLKS; i++) + hws[i] = ERR_PTR(-ENOENT); + + // PLLs + for (i = 0; i < ARRAY_SIZE(pll_data); i++) { + const struct wpcm450_pll_data *data = &pll_data[i]; + + hw = wpcm450_clk_register_pll(clk_base + data->reg, data->name, + data->parent_name, data->flags); + if (IS_ERR(hw)) { + pr_info("Failed to register PLL: %pe", hw); + goto err_free; + } + } + + // Early divisors (REF/2) + for (i = 0; i < ARRAY_SIZE(clkdiv_data_early); i++) { + const struct wpcm450_clkdiv_data *data = &clkdiv_data_early[i]; + + hw = clk_hw_register_divider_table(NULL, data->name, data->parent_name, + data->flags, clk_base + REG_CLKDIV, + data->shift, data->width, data->div_flags, + data->table, &wpcm450_clk_lock); + if (IS_ERR(hw)) { + pr_err("Failed to register div table: %pe\n", hw); + goto err_free; + } + } + + // Selects/muxes + for (i = 0; i < ARRAY_SIZE(clksel_data); i++) { + const struct wpcm450_clksel_data *data = &clksel_data[i]; + + hw = clk_hw_register_mux_table(NULL, data->name, data->parent_names, + data->num_parents, data->flags, + clk_base + REG_CLKSEL, data->shift, + BIT(data->width) - 1, 0, data->table, + &wpcm450_clk_lock); + if (IS_ERR(hw)) { + pr_err("Failed to register mux: %pe\n", hw); + goto err_free; + } + if (data->index >= 0) + clk_data->hws[data->index] = hw; + } + + // Divisors + for (i = 0; i < ARRAY_SIZE(clkdiv_data); i++) { + const struct wpcm450_clkdiv_data *data = &clkdiv_data[i]; + + hw = clk_hw_register_divider_table(NULL, data->name, data->parent_name, + data->flags, clk_base + REG_CLKDIV, + data->shift, data->width, data->div_flags, + data->table, &wpcm450_clk_lock); + if (IS_ERR(hw)) { + pr_err("Failed to register divider: %pe\n", hw); + goto err_free; + } + } + + // Enables/gates + for (i = 0; i < ARRAY_SIZE(clken_data); i++) { + const struct wpcm450_clken_data *data = &clken_data[i]; + + hw = clk_hw_register_gate(NULL, data->name, data->parent_name, data->flags, + clk_base + REG_CLKEN, data->bitnum, + data->flags, &wpcm450_clk_lock); + if (IS_ERR(hw)) { + pr_err("Failed to register gate: %pe\n", hw); + goto err_free; + } + clk_data->hws[data->bitnum] = hw; + } + + ret = of_clk_add_hw_provider(clk_np, of_clk_hw_onecell_get, clk_data); + if (ret) + pr_err("Failed to add DT provider: %d\n", ret); + + // Reset controller + rcdev = kzalloc(sizeof(*rcdev), GFP_KERNEL); + if (!rcdev) + goto err_free; + rcdev->owner = THIS_MODULE; + rcdev->nr_resets = WPCM450_NUM_RESETS; + rcdev->ops = &reset_simple_ops; + rcdev->of_node = clk_np; + ret = reset_controller_register(rcdev); + if (ret) + pr_err("Failed to register reset controller: %d\n", ret); + + of_node_put(clk_np); + return; + +err_free: + kfree(clk_data->hws); +err_unmap: + iounmap(clk_base); + of_node_put(clk_np); +} + +CLK_OF_DECLARE(wpcm450_clk_init, "nuvoton,wpcm450-clk", wpcm450_clk_init); diff --git a/drivers/reset/Kconfig b/drivers/reset/Kconfig index b496028b6bfaf..50a3c1403c335 100644 --- a/drivers/reset/Kconfig +++ b/drivers/reset/Kconfig @@ -201,7 +201,7 @@ config RESET_SCMI config RESET_SIMPLE bool "Simple Reset Controller Driver" if COMPILE_TEST - default ARCH_ASPEED || ARCH_BCM4908 || ARCH_BITMAIN || ARCH_REALTEK || ARCH_STM32 || (ARCH_INTEL_SOCFPGA && ARM64) || ARCH_SUNXI || ARC + default ARCH_ASPEED || ARCH_BCM4908 || ARCH_BITMAIN || ARCH_REALTEK || ARCH_STM32 || (ARCH_INTEL_SOCFPGA && ARM64) || ARCH_SUNXI || ARC || ARCH_NPCM help This enables a simple reset controller driver for reset lines that that can be asserted and deasserted by toggling bits in a contiguous,