From patchwork Wed Oct 18 08:28:44 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sean Wang X-Patchwork-Id: 10014113 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 40AB360215 for ; Wed, 18 Oct 2017 08:31:01 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 2DBF228AAE for ; Wed, 18 Oct 2017 08:31:01 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 228A528AF8; Wed, 18 Oct 2017 08:31:01 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, RCVD_IN_DNSWL_MED, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [65.50.211.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id B2DE128AAE for ; Wed, 18 Oct 2017 08:31:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=CC8r0RhUzK+S7D9DLZRU7hyT5Qy2a/8B8EwZUic6Ct4=; b=BVOR6FDkCk9Fz3 cnZ5u6HDZBRjEaaWk8ww/8Qz1O+FUTRSPZcLW1X/y2BZlvlR+17SjN/DO6xCrOI0ttgNem5GmdIF2 VhpT9oS6LIFkWZmM29PJ4sfkCv+sS4O2Tkm7Mf394cM9pt+XpLXxkL52ZNY+lGwyEb5awjPPmnTgU VmPlb1LRDR0RDiHKJLBPEFfUABfmSxU8XRdAN+zFRxF3yo+KIx7AskEZLr2CQM18F4F2yKLev+ZHO YFBOKQRfyufYSVqIYwXqQqISM6+uryl8+c4vnYa7ViqLJtH8CSfAdpNAT7MwFvp1NtJtlhtyywsUR B0Ix10xsohdg78UcD8Qw==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.87 #1 (Red Hat Linux)) id 1e4jkc-0007KU-QK; Wed, 18 Oct 2017 08:30:54 +0000 Received: from [210.61.82.183] (helo=mailgw01.mediatek.com) by bombadil.infradead.org with esmtps (Exim 4.87 #1 (Red Hat Linux)) id 1e4jj3-0004Qk-6V; Wed, 18 Oct 2017 08:29:21 +0000 X-UUID: 5b095a3081844601a9264fac4428ab98-20171018 Received: from mtkcas06.mediatek.inc [(172.21.101.30)] by mailgw01.mediatek.com (envelope-from ) (mhqrelay.mediatek.com ESMTP with TLS) with ESMTP id 1524762411; Wed, 18 Oct 2017 16:28:55 +0800 Received: from mtkcas09.mediatek.inc (172.21.101.178) by mtkmbs08n1.mediatek.inc (172.21.101.55) with Microsoft SMTP Server (TLS) id 15.0.1210.3; Wed, 18 Oct 2017 16:28:53 +0800 Received: from mtkswgap22.mediatek.inc (172.21.77.33) by mtkcas09.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1210.3 via Frontend Transport; Wed, 18 Oct 2017 16:28:54 +0800 From: To: , , , , Subject: [PATCH v6 3/7] soc: mediatek: pwrap: add pwrap_write32 for writing in 32-bit mode Date: Wed, 18 Oct 2017 16:28:44 +0800 Message-ID: X-Mailer: git-send-email 1.7.9.5 In-Reply-To: References: MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20171018_012917_568402_1B195A28 X-CRM114-Status: GOOD ( 15.97 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: chenglin.xu@mediatek.com, Sean Wang , chen.zhong@mediatek.com, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP From: Sean Wang Some regulators such as MediaTek MT6380 also has to be written in 32-bit mode. So the patch adds pwrap_write32, rename old pwrap_write into pwrap_write16 and one additional function pointer is introduced for increasing flexibility allowing the determination which mode is used by the pwrap slave detection through device tree. Signed-off-by: Chenglin Xu Signed-off-by: Chen Zhong Signed-off-by: Sean Wang --- drivers/soc/mediatek/mtk-pmic-wrap.c | 70 +++++++++++++++++++++++++++--------- 1 file changed, 54 insertions(+), 16 deletions(-) diff --git a/drivers/soc/mediatek/mtk-pmic-wrap.c b/drivers/soc/mediatek/mtk-pmic-wrap.c index 06930e2..2d3a8fa 100644 --- a/drivers/soc/mediatek/mtk-pmic-wrap.c +++ b/drivers/soc/mediatek/mtk-pmic-wrap.c @@ -507,6 +507,7 @@ struct pwrap_slv_type { * which type is used by the detection through device tree. */ int (*pwrap_read)(struct pmic_wrapper *wrp, u32 adr, u32 *rdata); + int (*pwrap_write)(struct pmic_wrapper *wrp, u32 adr, u32 wdata); }; struct pmic_wrapper { @@ -601,22 +602,6 @@ static int pwrap_wait_for_state(struct pmic_wrapper *wrp, } while (1); } -static int pwrap_write(struct pmic_wrapper *wrp, u32 adr, u32 wdata) -{ - int ret; - - ret = pwrap_wait_for_state(wrp, pwrap_is_fsm_idle); - if (ret) { - pwrap_leave_fsm_vldclr(wrp); - return ret; - } - - pwrap_writel(wrp, (1 << 31) | ((adr >> 1) << 16) | wdata, - PWRAP_WACS2_CMD); - - return 0; -} - static int pwrap_read16(struct pmic_wrapper *wrp, u32 adr, u32 *rdata) { int ret; @@ -673,6 +658,56 @@ static int pwrap_read(struct pmic_wrapper *wrp, u32 adr, u32 *rdata) return wrp->slave->pwrap_read(wrp, adr, rdata); } +static int pwrap_write16(struct pmic_wrapper *wrp, u32 adr, u32 wdata) +{ + int ret; + + ret = pwrap_wait_for_state(wrp, pwrap_is_fsm_idle); + if (ret) { + pwrap_leave_fsm_vldclr(wrp); + return ret; + } + + pwrap_writel(wrp, (1 << 31) | ((adr >> 1) << 16) | wdata, + PWRAP_WACS2_CMD); + + return 0; +} + +static int pwrap_write32(struct pmic_wrapper *wrp, u32 adr, u32 wdata) +{ + int ret, msb, rdata; + + for (msb = 0; msb < 2; msb++) { + ret = pwrap_wait_for_state(wrp, pwrap_is_fsm_idle); + if (ret) { + pwrap_leave_fsm_vldclr(wrp); + return ret; + } + + pwrap_writel(wrp, (1 << 31) | (msb << 30) | (adr << 16) | + ((wdata >> (msb * 16)) & 0xffff), + PWRAP_WACS2_CMD); + + /* + * The pwrap_read operation is the requirement of hardware used + * for the synchronization between two successive 16-bit + * pwrap_writel operations composing one 32-bit bus writing. + * Otherwise, we'll find the result fails on the lower 16-bit + * pwrap writing. + */ + if (!msb) + pwrap_read(wrp, adr, &rdata); + } + + return 0; +} + +static int pwrap_write(struct pmic_wrapper *wrp, u32 adr, u32 wdata) +{ + return wrp->slave->pwrap_write(wrp, adr, wdata); +} + static int pwrap_regmap_read(void *context, u32 adr, u32 *rdata) { return pwrap_read(context, adr, rdata); @@ -1082,18 +1117,21 @@ static const struct pwrap_slv_type pmic_mt6323 = { .dew_regs = mt6323_regs, .type = PMIC_MT6323, .pwrap_read = pwrap_read16, + .pwrap_write = pwrap_write16, }; static const struct pwrap_slv_type pmic_mt6380 = { .dew_regs = NULL, .type = PMIC_MT6380, .pwrap_read = pwrap_read32, + .pwrap_write = pwrap_write32, }; static const struct pwrap_slv_type pmic_mt6397 = { .dew_regs = mt6397_regs, .type = PMIC_MT6397, .pwrap_read = pwrap_read16, + .pwrap_write = pwrap_write16, }; static const struct of_device_id of_slave_match_tbl[] = {