From patchwork Thu Mar 5 19:05:28 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Elliot Berman X-Patchwork-Id: 11422473 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 0C8D214B4 for ; Thu, 5 Mar 2020 19:05:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id DF04D20801 for ; Thu, 5 Mar 2020 19:05:51 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=mg.codeaurora.org header.i=@mg.codeaurora.org header.b="e6MVYet8" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726413AbgCETFv (ORCPT ); Thu, 5 Mar 2020 14:05:51 -0500 Received: from mail26.static.mailgun.info ([104.130.122.26]:12491 "EHLO mail26.static.mailgun.info" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726009AbgCETFv (ORCPT ); Thu, 5 Mar 2020 14:05:51 -0500 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1583435150; h=References: In-Reply-To: Message-Id: Date: Subject: Cc: To: From: Sender; bh=mQiWXJp+X7Ke7HERQLsvQTkUb766N/UIjQRcz93aQ+c=; b=e6MVYet8PW2lPeeHrrkxP0YTWHay4yhWjE95na2r788VBrIVZx1NvSpBEBdXrvyJvqUs+7y/ zOr9X3wp7ON5PUPsD0Z66DHn2/Wem9Fznwb9lfA8GhpUsTAp8sscN55aP5uIZvhcrDPXQ6jh yhjCqlad+42ouYFg2C3sNoGjgEY= X-Mailgun-Sending-Ip: 104.130.122.26 X-Mailgun-Sid: WyI1MzIzYiIsICJsaW51eC1hcm0tbXNtQHZnZXIua2VybmVsLm9yZyIsICJiZTllNGEiXQ== Received: from smtp.codeaurora.org (ec2-35-166-182-171.us-west-2.compute.amazonaws.com [35.166.182.171]) by mxa.mailgun.org with ESMTP id 5e614d87.7fc39b1928b8-smtp-out-n03; Thu, 05 Mar 2020 19:05:43 -0000 (UTC) Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 46DF1C447A9; Thu, 5 Mar 2020 19:05:43 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-caf-mail-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.0 required=2.0 tests=ALL_TRUSTED,SPF_NONE, URIBL_BLOCKED autolearn=unavailable autolearn_force=no version=3.4.0 Received: from eberman-linux.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: eberman) by smtp.codeaurora.org (Postfix) with ESMTPSA id 38E9EC433A2; Thu, 5 Mar 2020 19:05:42 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 38E9EC433A2 Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; spf=none smtp.mailfrom=eberman@codeaurora.org From: Elliot Berman To: Mark Rutland , Lorenzo Pieralisi , Sudeep Holla Cc: Elliot Berman , Bjorn Andersson , Trilok Soni , Prasad Sodagudi , David Collins , linux-arm-kernel@lists.infradead.org, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v3 2/3] firmware: psci: Add support for dt-supplied SYSTEM_RESET2 type Date: Thu, 5 Mar 2020 11:05:28 -0800 Message-Id: <1583435129-31356-3-git-send-email-eberman@codeaurora.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1583435129-31356-1-git-send-email-eberman@codeaurora.org> References: <1583435129-31356-1-git-send-email-eberman@codeaurora.org> Sender: linux-arm-msm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Some implementors of PSCI may wish to use a different reset type than SYSTEM_WARM_RESET. For instance, Qualcomm SoCs support an alternate reset_type which may be used in more warm reboot scenarios than SYSTEM_WARM_RESET permits (e.g. to reboot into recovery mode). Signed-off-by: Elliot Berman --- drivers/firmware/psci/psci.c | 21 +++++++++++++++++---- include/uapi/linux/psci.h | 5 +++++ 2 files changed, 22 insertions(+), 4 deletions(-) diff --git a/drivers/firmware/psci/psci.c b/drivers/firmware/psci/psci.c index 2937d44..43fe3af 100644 --- a/drivers/firmware/psci/psci.c +++ b/drivers/firmware/psci/psci.c @@ -90,6 +90,8 @@ static u32 psci_function_id[PSCI_FN_MAX]; static u32 psci_cpu_suspend_feature; static bool psci_system_reset2_supported; +static u32 psci_sys_reset2_reset_param = + PSCI_1_1_SYSTEM_RESET2_SYSTEM_WARM_RESET; static inline bool psci_has_ext_power_state(void) { @@ -272,11 +274,10 @@ static void psci_sys_reset(enum reboot_mode reboot_mode, const char *cmd) if ((reboot_mode == REBOOT_WARM || reboot_mode == REBOOT_SOFT) && psci_system_reset2_supported) { /* - * reset_type[31] = 0 (architectural) - * reset_type[30:0] = 0 (SYSTEM_WARM_RESET) * cookie = 0 (ignored by the implementation) */ - invoke_psci_fn(PSCI_FN_NATIVE(1_1, SYSTEM_RESET2), 0, 0, 0); + invoke_psci_fn(PSCI_FN_NATIVE(1_1, SYSTEM_RESET2), + psci_sys_reset2_reset_param, 0, 0); } else { invoke_psci_fn(PSCI_0_2_FN_SYSTEM_RESET, 0, 0, 0); } @@ -493,6 +494,7 @@ typedef int (*psci_initcall_t)(const struct device_node *); static int __init psci_0_2_init(struct device_node *np) { int err; + u32 param; err = get_set_conduit_method(np); if (err) @@ -505,7 +507,18 @@ static int __init psci_0_2_init(struct device_node *np) * can be carried out according to the specific version reported * by firmware */ - return psci_probe(); + err = psci_probe(); + if (err) + return err; + + if (psci_system_reset2_supported && + !of_property_read_u32(np, "arm,psci-sys-reset2-vendor-param", ¶m)) { + psci_sys_reset2_reset_param = param | + (PSCI_1_1_SYSTEM_RESET2_OWNER_VENDOR << + PSCI_1_1_SYSTEM_RESET2_OWNER_SHIFT); + } + + return 0; } /* diff --git a/include/uapi/linux/psci.h b/include/uapi/linux/psci.h index 2fcad1d..0829175 100644 --- a/include/uapi/linux/psci.h +++ b/include/uapi/linux/psci.h @@ -55,6 +55,11 @@ #define PSCI_1_0_FN64_SYSTEM_SUSPEND PSCI_0_2_FN64(14) #define PSCI_1_1_FN64_SYSTEM_RESET2 PSCI_0_2_FN64(18) +#define PSCI_1_1_SYSTEM_RESET2_OWNER_SHIFT 31 +#define PSCI_1_1_SYSTEM_RESET2_OWNER_ARCH 0 +#define PSCI_1_1_SYSTEM_RESET2_OWNER_VENDOR 1 +#define PSCI_1_1_SYSTEM_RESET2_SYSTEM_WARM_RESET 0 + /* PSCI v0.2 power state encoding for CPU_SUSPEND function */ #define PSCI_0_2_POWER_STATE_ID_MASK 0xffff #define PSCI_0_2_POWER_STATE_ID_SHIFT 0