From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E393EC4CECD for ; Tue, 17 Sep 2019 04:51:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id ACA832189D for ; Tue, 17 Sep 2019 04:51:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2392308AbfIQEvt (ORCPT ); Tue, 17 Sep 2019 00:51:49 -0400 Received: from inva021.nxp.com ([92.121.34.21]:36260 "EHLO inva021.nxp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726191AbfIQEvt (ORCPT ); Tue, 17 Sep 2019 00:51:49 -0400 Received: from inva021.nxp.com (localhost [127.0.0.1]) by inva021.eu-rdc02.nxp.com (Postfix) with ESMTP id 59854200667; Tue, 17 Sep 2019 06:51:47 +0200 (CEST) Received: from invc005.ap-rdc01.nxp.com (invc005.ap-rdc01.nxp.com [165.114.16.14]) by inva021.eu-rdc02.nxp.com (Postfix) with ESMTP id B242720064A; Tue, 17 Sep 2019 06:51:42 +0200 (CEST) Received: from titan.ap.freescale.net (TITAN.ap.freescale.net [10.192.208.233]) by invc005.ap-rdc01.nxp.com (Postfix) with ESMTP id C036C402A6; Tue, 17 Sep 2019 12:51:36 +0800 (SGT) From: Biwen Li To: leoyang.li@nxp.com, shawnguo@kernel.org, robh+dt@kernel.org, mark.rutland@arm.com Cc: linuxppc-dev@lists.ozlabs.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, Biwen Li Subject: [v2,1/3] soc: fsl: fix that flextimer cannot wakeup system in deep sleep on LS1021A Date: Tue, 17 Sep 2019 12:41:17 +0800 Message-Id: <20190917044119.21895-1-biwen.li@nxp.com> X-Mailer: git-send-email 2.9.5 X-Virus-Scanned: ClamAV using ClamSMTP Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Why: - Cannot write register RCPM_IPPDEXPCR1 on LS1021A, Register RCPM_IPPDEXPCR1's default value is zero. So the register value that reading from register RCPM_IPPDEXPCR1 is always zero. How: - Save register RCPM_IPPDEXPCR1's value to register SCFG_SPARECR8.(uboot's psci also need reading value from the register SCFG_SPARECR8 to set register RCPM_IPPDEXPCR1) Signed-off-by: Biwen Li --- Change in v2: - fix stype problems drivers/soc/fsl/rcpm.c | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) diff --git a/drivers/soc/fsl/rcpm.c b/drivers/soc/fsl/rcpm.c index 82c0ad5e663e..0b710c24999c 100644 --- a/drivers/soc/fsl/rcpm.c +++ b/drivers/soc/fsl/rcpm.c @@ -13,6 +13,8 @@ #include #include #include +#include +#include #define RCPM_WAKEUP_CELL_MAX_SIZE 7 @@ -63,6 +65,31 @@ static int rcpm_pm_prepare(struct device *dev) tmp |= value[i + 1]; iowrite32be(tmp, rcpm->ippdexpcr_base + i * 4); } + #ifdef CONFIG_SOC_LS1021A + /* Workaround: There is a bug of register ippdexpcr1, + * cannot write it but can read it.Tt's default value is zero, + * then read it will always returns zero. + * So save ippdexpcr1's value to register SCFG_SPARECR8. + * And the value of ippdexpcr1 will be read from SCFG_SPARECR8. + */ + { + struct regmap *rcpm_scfg_regmap = NULL; + u32 reg_offset[RCPM_WAKEUP_CELL_MAX_SIZE + 1]; + u32 reg_value = 0; + + rcpm_scfg_regmap = syscon_regmap_lookup_by_phandle(np, "fsl,rcpm-scfg"); + if (rcpm_scfg_regmap) { + if (of_property_read_u32_array(dev->of_node, + "fsl,rcpm-scfg", reg_offset, rcpm->wakeup_cells + 1)) { + rcpm_scfg_regmap = NULL; + continue; + } + regmap_read(rcpm_scfg_regmap, reg_offset[i + 1], ®_value); + /* Write value to register SCFG_SPARECR8 */ + regmap_write(rcpm_scfg_regmap, reg_offset[i + 1], tmp | reg_value); + } + } + #endif //CONFIG_SOC_LS1021A } } } while (ws = wakeup_source_get_next(ws)); -- 2.17.1