From patchwork Tue Jun 7 14:05:54 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Johnson Wang X-Patchwork-Id: 12871976 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id B630FC433EF for ; Tue, 7 Jun 2022 14:17:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-ID:Date:Subject:CC :To:From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=TGKtXkjG/nBWK6GRf0K1hKM4kr+M4NS7sR+/ZhUPWLI=; b=alXbNooRKocbu6 YG1rMtecPIr2dB7wN7VmVh8ET5Ft0h5numl0aHFFDtLj0MDmdnp0GOc1KukP4bWTs6nUXhvkydU0T 6QKGZZUas9z5rJNm2pABGritM0rrby+oZZNrE3GQ/KSumzojjTDbNCrQ01U+C+abUIaWu2tFPFP1Q s0KpBOdy7Rs+FDiPp/cQegwROo5WhPuNSh/uIvD63xDxGPfE4G2gH58xtIYAr994iPON108TiOzsw Exx80VFHeOBC7s5vFfdie2GLxMYzQ3uPMT3OMkPOy+ZJXLncNuktNpUy/TOMZHG/cKOb1ls3d0ZyT AQz+nUFH5aFuGVWSzV0A==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nya0H-007zUJ-9q; Tue, 07 Jun 2022 14:16:17 +0000 Received: from mailgw01.mediatek.com ([216.200.240.184]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1nya0D-007zSz-Aj; Tue, 07 Jun 2022 14:16:14 +0000 X-UUID: 7de8c1e46f3a48b1be4acc421f05c999-20220607 X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.5,REQID:6ae54236-3ba0-4309-9329-ca5aa103810a,OB:0,LO B:0,IP:0,URL:0,TC:0,Content:0,EDM:0,RT:0,SF:0,FILE:0,RULE:Release_Ham,ACTI ON:release,TS:0 X-CID-META: VersionHash:2a19b09,CLOUDID:01b1f5e4-2ba2-4dc1-b6c5-11feb6c769e0,C OID:IGNORED,Recheck:0,SF:nil,TC:nil,Content:0,EDM:-3,IP:nil,URL:0,File:nil ,QS:0,BEC:nil X-UUID: 7de8c1e46f3a48b1be4acc421f05c999-20220607 Received: from mtkcas66.mediatek.inc [(172.29.193.44)] by mailgw01.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLSv1.2 ECDHE-RSA-AES256-SHA384 256/256) with ESMTP id 1015962411; Tue, 07 Jun 2022 07:16:10 -0700 Received: from mtkmbs11n1.mediatek.inc (172.21.101.185) by MTKMBS62N1.mediatek.inc (172.29.193.41) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Tue, 7 Jun 2022 07:06:11 -0700 Received: from mtkcas11.mediatek.inc (172.21.101.40) by mtkmbs11n1.mediatek.inc (172.21.101.185) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384) id 15.2.792.3; Tue, 7 Jun 2022 22:06:06 +0800 Received: from mtksdccf07.mediatek.inc (172.21.84.99) by mtkcas11.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Tue, 7 Jun 2022 22:06:06 +0800 From: Johnson Wang To: , , , CC: , , , , , , , , , Johnson Wang Subject: [PATCH v7 0/2] Introduce MediaTek CCI devfreq driver Date: Tue, 7 Jun 2022 22:05:54 +0800 Message-ID: <20220607140556.6278-1-johnson.wang@mediatek.com> X-Mailer: git-send-email 2.18.0 MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220607_071613_417780_03E2F6D6 X-CRM114-Status: GOOD ( 12.72 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org The Cache Coherent Interconnect (CCI) is the management of cache coherency by hardware. CCI DEVFREQ is DVFS driver for power saving by scaling clock frequency and supply voltage of CCI. CCI uses the same input clock source and power rail as LITTLE CPUs on Mediatek SoCs. This series depends on: Chanwoo's repo: kernel/git/chanwoo/linux.git branch: devfreq-testing [1]: PM / devfreq: Export devfreq_get_freq_range symbol within devfreq [2]: PM / devfreq: Add cpu based scaling support to passive governor [3]: PM / devfreq: passive: Reduce duplicate code when passive_devfreq case [4]: PM / devfreq: passive: Update frequency when start governor Changes in v7: - remove the 'ret' printing from dev_err_probe(). Changes in v6: - Remove unnecessary "goto" statement. Changes in v5: - Modify some binding description. - Remove pre_voltage member. - Not to enable/disable intermediate clock. - Not to "put" resources that using devm_ variants. Resend v4: - CC interconnect maintainer. - Change sign-off sequence in commit message. Changes in v4: - Add a maintainer in the binding document. - Modify clock description. - Add binding document into MAINTAINERS. - Replace format specifier %d with %ld. Changes in v3: - Move binding document to 'interconnect' and rename it. - Add COMPILE_TEST dependence symbol. - Remove need_voltage_tracking variable. - Move mtk_ccifreq_voltage_tracking() code into mtk_ccifreq_set_voltage(). - Add an interation limit in the while() loop. - Replace 'cci_dev' with 'dev' - Replace old_* with pre_* - Remove of_match_ptr() - Use module_platform_driver() Changes in v2: - Take MT8183 as example in binding document. - Use dev_err() instead of pr_err(). - Use 'goto' statement to handle error case. - Clean up driver code. Johnson Wang (2): dt-bindings: interconnect: Add MediaTek CCI dt-bindings PM / devfreq: mediatek: Introduce MediaTek CCI devfreq driver .../bindings/interconnect/mediatek,cci.yaml | 140 ++++++ MAINTAINERS | 1 + drivers/devfreq/Kconfig | 10 + drivers/devfreq/Makefile | 1 + drivers/devfreq/mtk-cci-devfreq.c | 474 ++++++++++++++++++ 5 files changed, 626 insertions(+) create mode 100644 Documentation/devicetree/bindings/interconnect/mediatek,cci.yaml create mode 100644 drivers/devfreq/mtk-cci-devfreq.c Tested-by: Kevin Hilman