From patchwork Mon Oct 26 11:10:49 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tony Lindgren X-Patchwork-Id: 11856691 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 5F5FD1130 for ; Mon, 26 Oct 2020 11:11:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 471FE2224A for ; Mon, 26 Oct 2020 11:11:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1773202AbgJZLLl (ORCPT ); Mon, 26 Oct 2020 07:11:41 -0400 Received: from muru.com ([72.249.23.125]:46626 "EHLO muru.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1773189AbgJZLLd (ORCPT ); Mon, 26 Oct 2020 07:11:33 -0400 Received: from hillo.muru.com (localhost [127.0.0.1]) by muru.com (Postfix) with ESMTP id 68F4281A0; Mon, 26 Oct 2020 11:11:34 +0000 (UTC) From: Tony Lindgren To: linux-omap@vger.kernel.org Cc: "Andrew F . Davis" , Dave Gerlach , Faiz Abbas , Greg Kroah-Hartman , Grygorii Strashko , Keerthy , Nishanth Menon , Peter Ujfalusi , Roger Quadros , Suman Anna , Tero Kristo , linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-remoteproc@vger.kernel.org, Bjorn Andersson , Philipp Zabel , Michael Turquette , Santosh Shilimkar , Stephen Boyd , linux-clk@vger.kernel.org Subject: [PATCH 9/9] remoteproc/wkup_m3: Use reset control driver if available Date: Mon, 26 Oct 2020 13:10:49 +0200 Message-Id: <20201026111049.54835-10-tony@atomide.com> X-Mailer: git-send-email 2.29.1 In-Reply-To: <20201026111049.54835-1-tony@atomide.com> References: <20201026111049.54835-1-tony@atomide.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org In order to move wkup_m3 to probe without platform data, let's add support for using optional reset control driver if configured in the dts. With this change and the related dts change, we can start dropping the platform data for am335x. And once wkup_m3 no longer needs platform data, we can simply drop the related legacy reset platform data callbacks from wkup_m3 driver later on after also am437x no longer depends on it. Cc: linux-remoteproc@vger.kernel.org Cc: Bjorn Andersson Cc: Dave Gerlach Cc: Philipp Zabel Cc: Suman Anna Signed-off-by: Tony Lindgren --- Please review and ack if no issues. If you guys instead want to set up an immutable remoteproc branch with just this patch in it against v5.10-rc1 that works too :) --- drivers/remoteproc/wkup_m3_rproc.c | 28 +++++++++++++++++++++------- 1 file changed, 21 insertions(+), 7 deletions(-) diff --git a/drivers/remoteproc/wkup_m3_rproc.c b/drivers/remoteproc/wkup_m3_rproc.c --- a/drivers/remoteproc/wkup_m3_rproc.c +++ b/drivers/remoteproc/wkup_m3_rproc.c @@ -17,6 +17,7 @@ #include #include #include +#include #include @@ -43,11 +44,13 @@ struct wkup_m3_mem { * @rproc: rproc handle * @pdev: pointer to platform device * @mem: WkupM3 memory information + * @rsts: reset control */ struct wkup_m3_rproc { struct rproc *rproc; struct platform_device *pdev; struct wkup_m3_mem mem[WKUPM3_MEM_MAX]; + struct reset_control *rsts; }; static int wkup_m3_rproc_start(struct rproc *rproc) @@ -57,6 +60,9 @@ static int wkup_m3_rproc_start(struct rproc *rproc) struct device *dev = &pdev->dev; struct wkup_m3_platform_data *pdata = dev_get_platdata(dev); + if (wkupm3->rsts) + return reset_control_deassert(wkupm3->rsts); + if (pdata->deassert_reset(pdev, pdata->reset_name)) { dev_err(dev, "Unable to reset wkup_m3!\n"); return -ENODEV; @@ -72,6 +78,9 @@ static int wkup_m3_rproc_stop(struct rproc *rproc) struct device *dev = &pdev->dev; struct wkup_m3_platform_data *pdata = dev_get_platdata(dev); + if (wkupm3->rsts) + return reset_control_assert(wkupm3->rsts); + if (pdata->assert_reset(pdev, pdata->reset_name)) { dev_err(dev, "Unable to assert reset of wkup_m3!\n"); return -ENODEV; @@ -132,12 +141,6 @@ static int wkup_m3_rproc_probe(struct platform_device *pdev) int ret; int i; - if (!(pdata && pdata->deassert_reset && pdata->assert_reset && - pdata->reset_name)) { - dev_err(dev, "Platform data missing!\n"); - return -ENODEV; - } - ret = of_property_read_string(dev->of_node, "ti,pm-firmware", &fw_name); if (ret) { @@ -165,6 +168,17 @@ static int wkup_m3_rproc_probe(struct platform_device *pdev) wkupm3->rproc = rproc; wkupm3->pdev = pdev; + wkupm3->rsts = devm_reset_control_get_optional_shared(dev, "rstctrl"); + if (PTR_ERR_OR_ZERO(wkupm3->rsts)) { + if (!(pdata && pdata->deassert_reset && pdata->assert_reset && + pdata->reset_name)) { + dev_err(dev, "Platform data missing!\n"); + ret = -ENODEV; + goto err_put_rproc; + } + wkupm3->rsts = NULL; + } + for (i = 0; i < ARRAY_SIZE(mem_names); i++) { res = platform_get_resource_byname(pdev, IORESOURCE_MEM, mem_names[i]); @@ -173,7 +187,7 @@ static int wkup_m3_rproc_probe(struct platform_device *pdev) dev_err(&pdev->dev, "devm_ioremap_resource failed for resource %d\n", i); ret = PTR_ERR(wkupm3->mem[i].cpu_addr); - goto err; + goto err_put_rproc; } wkupm3->mem[i].bus_addr = res->start; wkupm3->mem[i].size = resource_size(res);