From patchwork Tue Jun 18 07:46:16 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sowjanya Komatineni X-Patchwork-Id: 1117704 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=linux-tegra-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=pass (p=none dis=none) header.from=nvidia.com Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=nvidia.com header.i=@nvidia.com header.b="j6VfsFP+"; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 45SgDW6Z1tz9s9y for ; Tue, 18 Jun 2019 17:48:11 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728815AbfFRHqq (ORCPT ); Tue, 18 Jun 2019 03:46:46 -0400 Received: from hqemgate14.nvidia.com ([216.228.121.143]:9678 "EHLO hqemgate14.nvidia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728705AbfFRHqo (ORCPT ); Tue, 18 Jun 2019 03:46:44 -0400 Received: from hqpgpgate101.nvidia.com (Not Verified[216.228.121.13]) by hqemgate14.nvidia.com (using TLS: TLSv1.2, DES-CBC3-SHA) id ; Tue, 18 Jun 2019 00:46:40 -0700 Received: from hqmail.nvidia.com ([172.20.161.6]) by hqpgpgate101.nvidia.com (PGP Universal service); Tue, 18 Jun 2019 00:46:41 -0700 X-PGP-Universal: processed; by hqpgpgate101.nvidia.com on Tue, 18 Jun 2019 00:46:41 -0700 Received: from HQMAIL109.nvidia.com (172.20.187.15) by HQMAIL104.nvidia.com (172.18.146.11) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Tue, 18 Jun 2019 07:46:40 +0000 Received: from HQMAIL104.nvidia.com (172.18.146.11) by HQMAIL109.nvidia.com (172.20.187.15) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Tue, 18 Jun 2019 07:46:40 +0000 Received: from hqnvemgw02.nvidia.com (172.16.227.111) by HQMAIL104.nvidia.com (172.18.146.11) with Microsoft SMTP Server (TLS) id 15.0.1473.3 via Frontend Transport; Tue, 18 Jun 2019 07:46:40 +0000 Received: from skomatineni-linux.nvidia.com (Not Verified[10.2.168.217]) by hqnvemgw02.nvidia.com with Trustwave SEG (v7, 5, 8, 10121) id ; Tue, 18 Jun 2019 00:46:40 -0700 From: Sowjanya Komatineni To: , , , , , , , CC: , , , , , , , , , , , , , , , Subject: [PATCH V3 02/17] pinctrl: tegra: add suspend and resume support Date: Tue, 18 Jun 2019 00:46:16 -0700 Message-ID: <1560843991-24123-3-git-send-email-skomatineni@nvidia.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1560843991-24123-1-git-send-email-skomatineni@nvidia.com> References: <1560843991-24123-1-git-send-email-skomatineni@nvidia.com> X-NVConfidentiality: public MIME-Version: 1.0 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nvidia.com; s=n1; t=1560844001; bh=We6H6QZmq3ulWraKmNFRrGEHqkAGeKtjqQtDHViMyOg=; h=X-PGP-Universal:From:To:CC:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:X-NVConfidentiality:MIME-Version: Content-Type; b=j6VfsFP+B5u1nHhsq13nAS0XmBO+zzY/4I6MCwQSgAYNSnqVuw8vcYKPzhK/NKsYD YLY3UrGD3y7KfRc0eLbFruN3yj9JLY2RJf5184K48DSqy8EuX0QsImFOJe4VBea9mw In3ELIosMCHaI/7BnQadpOl0EZrAE4N7SYFNaFhHFd3ehHhWDPlYzKfMX4YWb7R6lx Lf63DwqavQA9boLuOv0eG1jmlV8XgAOUeK5HL/T8JsDGfqzpkXkNOALneXtPsydIjn 5dtf6n0b8tLt0SSuZS63sMOkzLcjkEDF/rLWtil2tPX2zI1WL5vrwBTlhjqWCdj6TG r9QheNo0H0YyA== Sender: linux-tegra-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-tegra@vger.kernel.org This patch adds suspend and resume support for Tegra pinctrl driver and registers them to syscore so the pinmux settings are restored before the devices resume. Signed-off-by: Sowjanya Komatineni Signed-off-by: Thierry Reding --- drivers/pinctrl/tegra/pinctrl-tegra.c | 62 ++++++++++++++++++++++++++++++++ drivers/pinctrl/tegra/pinctrl-tegra.h | 5 +++ drivers/pinctrl/tegra/pinctrl-tegra114.c | 1 + drivers/pinctrl/tegra/pinctrl-tegra124.c | 1 + drivers/pinctrl/tegra/pinctrl-tegra20.c | 1 + drivers/pinctrl/tegra/pinctrl-tegra210.c | 13 +++++++ drivers/pinctrl/tegra/pinctrl-tegra30.c | 1 + 7 files changed, 84 insertions(+) diff --git a/drivers/pinctrl/tegra/pinctrl-tegra.c b/drivers/pinctrl/tegra/pinctrl-tegra.c index 34596b246578..ceced30d8bd1 100644 --- a/drivers/pinctrl/tegra/pinctrl-tegra.c +++ b/drivers/pinctrl/tegra/pinctrl-tegra.c @@ -20,11 +20,16 @@ #include #include #include +#include #include "../core.h" #include "../pinctrl-utils.h" #include "pinctrl-tegra.h" +#define EMMC2_PAD_CFGPADCTRL_0 0x1c8 +#define EMMC4_PAD_CFGPADCTRL_0 0x1e0 +#define EMMC_DPD_PARKING (0x1fff << 14) + static inline u32 pmx_readl(struct tegra_pmx *pmx, u32 bank, u32 reg) { return readl(pmx->regs[bank] + reg); @@ -619,6 +624,48 @@ static void tegra_pinctrl_clear_parked_bits(struct tegra_pmx *pmx) pmx_writel(pmx, val, g->mux_bank, g->mux_reg); } } + + if (pmx->soc->has_park_padcfg) { + val = pmx_readl(pmx, 0, EMMC2_PAD_CFGPADCTRL_0); + val &= ~EMMC_DPD_PARKING; + pmx_writel(pmx, val, 0, EMMC2_PAD_CFGPADCTRL_0); + + val = pmx_readl(pmx, 0, EMMC4_PAD_CFGPADCTRL_0); + val &= ~EMMC_DPD_PARKING; + pmx_writel(pmx, val, 0, EMMC4_PAD_CFGPADCTRL_0); + } +} + +int __maybe_unused tegra_pinctrl_suspend(struct device *dev) +{ + struct tegra_pmx *pmx = dev_get_drvdata(dev); + u32 *backup_regs = pmx->backup_regs; + u32 *regs; + int i, j; + + for (i = 0; i < pmx->nbanks; i++) { + regs = pmx->regs[i]; + for (j = 0; j < pmx->reg_bank_size[i] / 4; j++) + *backup_regs++ = readl(regs++); + } + + return pinctrl_force_sleep(pmx->pctl); +} + +int __maybe_unused tegra_pinctrl_resume(struct device *dev) +{ + struct tegra_pmx *pmx = dev_get_drvdata(dev); + u32 *backup_regs = pmx->backup_regs; + u32 *regs; + int i, j; + + for (i = 0; i < pmx->nbanks; i++) { + regs = pmx->regs[i]; + for (j = 0; j < pmx->reg_bank_size[i] / 4; j++) + writel(*backup_regs++, regs++); + } + + return 0; } static bool gpio_node_has_range(const char *compatible) @@ -645,6 +692,7 @@ int tegra_pinctrl_probe(struct platform_device *pdev, int i; const char **group_pins; int fn, gn, gfn; + unsigned long backup_regs_size = 0; pmx = devm_kzalloc(&pdev->dev, sizeof(*pmx), GFP_KERNEL); if (!pmx) @@ -697,6 +745,7 @@ int tegra_pinctrl_probe(struct platform_device *pdev, res = platform_get_resource(pdev, IORESOURCE_MEM, i); if (!res) break; + backup_regs_size += resource_size(res); } pmx->nbanks = i; @@ -705,11 +754,24 @@ int tegra_pinctrl_probe(struct platform_device *pdev, if (!pmx->regs) return -ENOMEM; + pmx->reg_bank_size = devm_kcalloc(&pdev->dev, pmx->nbanks, + sizeof(*pmx->reg_bank_size), + GFP_KERNEL); + if (!pmx->reg_bank_size) + return -ENOMEM; + + pmx->backup_regs = devm_kzalloc(&pdev->dev, backup_regs_size, + GFP_KERNEL); + if (!pmx->backup_regs) + return -ENOMEM; + for (i = 0; i < pmx->nbanks; i++) { res = platform_get_resource(pdev, IORESOURCE_MEM, i); pmx->regs[i] = devm_ioremap_resource(&pdev->dev, res); if (IS_ERR(pmx->regs[i])) return PTR_ERR(pmx->regs[i]); + + pmx->reg_bank_size[i] = resource_size(res); } pmx->pctl = devm_pinctrl_register(&pdev->dev, &tegra_pinctrl_desc, pmx); diff --git a/drivers/pinctrl/tegra/pinctrl-tegra.h b/drivers/pinctrl/tegra/pinctrl-tegra.h index 287702660783..d63e472ee0e1 100644 --- a/drivers/pinctrl/tegra/pinctrl-tegra.h +++ b/drivers/pinctrl/tegra/pinctrl-tegra.h @@ -17,6 +17,8 @@ struct tegra_pmx { int nbanks; void __iomem **regs; + size_t *reg_bank_size; + u32 *backup_regs; }; enum tegra_pinconf_param { @@ -191,8 +193,11 @@ struct tegra_pinctrl_soc_data { bool hsm_in_mux; bool schmitt_in_mux; bool drvtype_in_mux; + bool has_park_padcfg; }; int tegra_pinctrl_probe(struct platform_device *pdev, const struct tegra_pinctrl_soc_data *soc_data); +int __maybe_unused tegra_pinctrl_suspend(struct device *dev); +int __maybe_unused tegra_pinctrl_resume(struct device *dev); #endif diff --git a/drivers/pinctrl/tegra/pinctrl-tegra114.c b/drivers/pinctrl/tegra/pinctrl-tegra114.c index 762151f17a88..06ea8164df9d 100644 --- a/drivers/pinctrl/tegra/pinctrl-tegra114.c +++ b/drivers/pinctrl/tegra/pinctrl-tegra114.c @@ -1841,6 +1841,7 @@ static const struct tegra_pinctrl_soc_data tegra114_pinctrl = { .hsm_in_mux = false, .schmitt_in_mux = false, .drvtype_in_mux = false, + .has_park_padcfg = false, }; static int tegra114_pinctrl_probe(struct platform_device *pdev) diff --git a/drivers/pinctrl/tegra/pinctrl-tegra124.c b/drivers/pinctrl/tegra/pinctrl-tegra124.c index 930c43758c92..abc8fe92d154 100644 --- a/drivers/pinctrl/tegra/pinctrl-tegra124.c +++ b/drivers/pinctrl/tegra/pinctrl-tegra124.c @@ -2053,6 +2053,7 @@ static const struct tegra_pinctrl_soc_data tegra124_pinctrl = { .hsm_in_mux = false, .schmitt_in_mux = false, .drvtype_in_mux = false, + .has_park_padcfg = false, }; static int tegra124_pinctrl_probe(struct platform_device *pdev) diff --git a/drivers/pinctrl/tegra/pinctrl-tegra20.c b/drivers/pinctrl/tegra/pinctrl-tegra20.c index 4b7837e38fb5..993b82cbfba7 100644 --- a/drivers/pinctrl/tegra/pinctrl-tegra20.c +++ b/drivers/pinctrl/tegra/pinctrl-tegra20.c @@ -2223,6 +2223,7 @@ static const struct tegra_pinctrl_soc_data tegra20_pinctrl = { .hsm_in_mux = false, .schmitt_in_mux = false, .drvtype_in_mux = false, + .has_park_padcfg = false, }; static const char *cdev1_parents[] = { diff --git a/drivers/pinctrl/tegra/pinctrl-tegra210.c b/drivers/pinctrl/tegra/pinctrl-tegra210.c index 0b56ad5c9c1c..10e8a2ec8094 100644 --- a/drivers/pinctrl/tegra/pinctrl-tegra210.c +++ b/drivers/pinctrl/tegra/pinctrl-tegra210.c @@ -1555,6 +1555,7 @@ static const struct tegra_pinctrl_soc_data tegra210_pinctrl = { .hsm_in_mux = true, .schmitt_in_mux = true, .drvtype_in_mux = true, + .has_park_padcfg = true, }; static int tegra210_pinctrl_probe(struct platform_device *pdev) @@ -1562,6 +1563,17 @@ static int tegra210_pinctrl_probe(struct platform_device *pdev) return tegra_pinctrl_probe(pdev, &tegra210_pinctrl); } +#ifdef CONFIG_PM_SLEEP +static const struct dev_pm_ops tegra_pinctrl_pm = { + .suspend = &tegra_pinctrl_suspend, + .resume = &tegra_pinctrl_resume +}; + +#define TEGRA_PINCTRL_PM (&tegra_pinctrl_pm) +#else +#define TEGRA_PINCTRL_PM NULL +#endif + static const struct of_device_id tegra210_pinctrl_of_match[] = { { .compatible = "nvidia,tegra210-pinmux", }, { }, @@ -1571,6 +1583,7 @@ static struct platform_driver tegra210_pinctrl_driver = { .driver = { .name = "tegra210-pinctrl", .of_match_table = tegra210_pinctrl_of_match, + .pm = TEGRA_PINCTRL_PM, }, .probe = tegra210_pinctrl_probe, }; diff --git a/drivers/pinctrl/tegra/pinctrl-tegra30.c b/drivers/pinctrl/tegra/pinctrl-tegra30.c index 610124c3d192..779ee40e5f21 100644 --- a/drivers/pinctrl/tegra/pinctrl-tegra30.c +++ b/drivers/pinctrl/tegra/pinctrl-tegra30.c @@ -2476,6 +2476,7 @@ static const struct tegra_pinctrl_soc_data tegra30_pinctrl = { .hsm_in_mux = false, .schmitt_in_mux = false, .drvtype_in_mux = false, + .has_park_padcfg = false, }; static int tegra30_pinctrl_probe(struct platform_device *pdev)