From patchwork Tue May 28 23:08:46 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sowjanya Komatineni X-Patchwork-Id: 10965929 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id A1BDD912 for ; Tue, 28 May 2019 23:09:55 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 9207D1FF60 for ; Tue, 28 May 2019 23:09:55 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 85E3B28874; Tue, 28 May 2019 23:09:55 +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=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id CCC90285AF for ; Tue, 28 May 2019 23:09:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726917AbfE1XJu (ORCPT ); Tue, 28 May 2019 19:09:50 -0400 Received: from hqemgate15.nvidia.com ([216.228.121.64]:11159 "EHLO hqemgate15.nvidia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726994AbfE1XJC (ORCPT ); Tue, 28 May 2019 19:09:02 -0400 Received: from hqpgpgate101.nvidia.com (Not Verified[216.228.121.13]) by hqemgate15.nvidia.com (using TLS: TLSv1.2, DES-CBC3-SHA) id ; Tue, 28 May 2019 16:08:51 -0700 Received: from hqmail.nvidia.com ([172.20.161.6]) by hqpgpgate101.nvidia.com (PGP Universal service); Tue, 28 May 2019 16:09:00 -0700 X-PGP-Universal: processed; by hqpgpgate101.nvidia.com on Tue, 28 May 2019 16:09:00 -0700 Received: from HQMAIL112.nvidia.com (172.18.146.18) by HQMAIL108.nvidia.com (172.18.146.13) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Tue, 28 May 2019 23:08:59 +0000 Received: from HQMAIL104.nvidia.com (172.18.146.11) by HQMAIL112.nvidia.com (172.18.146.18) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Tue, 28 May 2019 23:08:59 +0000 Received: from hqnvemgw01.nvidia.com (172.20.150.20) by HQMAIL104.nvidia.com (172.18.146.11) with Microsoft SMTP Server (TLS) id 15.0.1473.3 via Frontend Transport; Tue, 28 May 2019 23:08:59 +0000 Received: from skomatineni-linux.nvidia.com (Not Verified[10.110.103.86]) by hqnvemgw01.nvidia.com with Trustwave SEG (v7,5,8,10121) id ; Tue, 28 May 2019 16:08:59 -0700 From: Sowjanya Komatineni To: , , , , , , , CC: , , , , , , , , , , , , , , Subject: [PATCH V2 02/12] pinctrl: tegra: add suspend and resume support Date: Tue, 28 May 2019 16:08:46 -0700 Message-ID: <1559084936-4610-3-git-send-email-skomatineni@nvidia.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1559084936-4610-1-git-send-email-skomatineni@nvidia.com> References: <1559084936-4610-1-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=1559084931; bh=1xQTTbYTuPrto0ISx2uIjIGBvlAvxtvkm/nwrFZurio=; h=X-PGP-Universal:From:To:CC:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:X-NVConfidentiality:MIME-Version: Content-Type; b=LHvM/bKICmb2hxEW1u9Kc+QyqJJU6E0ERAosA74SzGlhdRns6rQ3sFqjIZXFC8jAZ +PPepx9H+ckB7accx6fv1W35O9fh5KiRliDTah+OOagzTkHU4tkfuEdsckYjA+ZwCD u/5oghWBziGJUjJnLfHPHy7Mb+MisNehiRF38+zQ97sBlnqDw+bqteJ9uqTtWrGlql 1TNjdiCN5W/Gdw3Ra4qNg+SeA9ggtS4b7cSFdol1egRKbjMlg7BL+Gfz50k6XxMflU /iuMUzYqZ8WW3JY4Pno5MenEAS1MrJIo/A29ZZdZGRcRCiR5cRzG5oGHbCjM+KAUuV +gGDx7VNhFFew== Sender: linux-clk-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-clk@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP 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 --- drivers/pinctrl/tegra/pinctrl-tegra.c | 68 +++++++++++++++++++++++++++++++- drivers/pinctrl/tegra/pinctrl-tegra.h | 3 ++ 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 | 1 + drivers/pinctrl/tegra/pinctrl-tegra30.c | 1 + 7 files changed, 75 insertions(+), 1 deletion(-) diff --git a/drivers/pinctrl/tegra/pinctrl-tegra.c b/drivers/pinctrl/tegra/pinctrl-tegra.c index a5008c066bac..bdc47e62c457 100644 --- a/drivers/pinctrl/tegra/pinctrl-tegra.c +++ b/drivers/pinctrl/tegra/pinctrl-tegra.c @@ -28,11 +28,18 @@ #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 struct tegra_pmx *pmx; + static inline u32 pmx_readl(struct tegra_pmx *pmx, u32 bank, u32 reg) { return readl(pmx->regs[bank] + reg); @@ -629,6 +636,50 @@ static void tegra_pinctrl_clear_parked_bits(struct tegra_pmx *pmx) } } +static int __maybe_unused tegra_pinctrl_suspend(void) +{ + 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); +} + +static void __maybe_unused tegra_pinctrl_resume(void) +{ + u32 *backup_regs = pmx->backup_regs; + u32 *regs; + u32 val; + 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++); + } + + 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); + } +} + +static struct syscore_ops pinctrl_syscore_ops = { + .suspend = tegra_pinctrl_suspend, + .resume = tegra_pinctrl_resume, +}; + static bool gpio_node_has_range(const char *compatible) { struct device_node *np; @@ -648,11 +699,11 @@ static bool gpio_node_has_range(const char *compatible) int tegra_pinctrl_probe(struct platform_device *pdev, const struct tegra_pinctrl_soc_data *soc_data) { - struct tegra_pmx *pmx; struct resource *res; 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) @@ -705,6 +756,7 @@ 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; @@ -713,11 +765,24 @@ 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); @@ -732,6 +797,7 @@ int tegra_pinctrl_probe(struct platform_device *pdev, pinctrl_add_gpio_range(pmx->pctl, &tegra_pinctrl_gpio_range); platform_set_drvdata(pdev, pmx); + register_syscore_ops(&pinctrl_syscore_ops); dev_dbg(&pdev->dev, "Probed Tegra pinctrl driver\n"); diff --git a/drivers/pinctrl/tegra/pinctrl-tegra.h b/drivers/pinctrl/tegra/pinctrl-tegra.h index 44c71941b5f8..b405df6fd390 100644 --- a/drivers/pinctrl/tegra/pinctrl-tegra.h +++ b/drivers/pinctrl/tegra/pinctrl-tegra.h @@ -25,6 +25,8 @@ struct tegra_pmx { int nbanks; void __iomem **regs; + size_t *reg_bank_size; + u32 *backup_regs; }; enum tegra_pinconf_param { @@ -199,6 +201,7 @@ 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, diff --git a/drivers/pinctrl/tegra/pinctrl-tegra114.c b/drivers/pinctrl/tegra/pinctrl-tegra114.c index d43c209e9c30..4ac44f34dccf 100644 --- a/drivers/pinctrl/tegra/pinctrl-tegra114.c +++ b/drivers/pinctrl/tegra/pinctrl-tegra114.c @@ -1849,6 +1849,7 @@ 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 5b07a5834d15..1dac7648b41f 100644 --- a/drivers/pinctrl/tegra/pinctrl-tegra124.c +++ b/drivers/pinctrl/tegra/pinctrl-tegra124.c @@ -2061,6 +2061,7 @@ 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 1fc82a9576e0..9d2b25200f32 100644 --- a/drivers/pinctrl/tegra/pinctrl-tegra20.c +++ b/drivers/pinctrl/tegra/pinctrl-tegra20.c @@ -2231,6 +2231,7 @@ 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 3e77f5474dd8..dc06c36e698a 100644 --- a/drivers/pinctrl/tegra/pinctrl-tegra210.c +++ b/drivers/pinctrl/tegra/pinctrl-tegra210.c @@ -1563,6 +1563,7 @@ 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) diff --git a/drivers/pinctrl/tegra/pinctrl-tegra30.c b/drivers/pinctrl/tegra/pinctrl-tegra30.c index 10e617003e9c..42182d714950 100644 --- a/drivers/pinctrl/tegra/pinctrl-tegra30.c +++ b/drivers/pinctrl/tegra/pinctrl-tegra30.c @@ -2484,6 +2484,7 @@ 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)