From patchwork Mon Sep 19 18:13:09 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dinh Nguyen X-Patchwork-Id: 607547 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 293F3ECAAA1 for ; Mon, 19 Sep 2022 18:13:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229502AbiISSNr (ORCPT ); Mon, 19 Sep 2022 14:13:47 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41834 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229562AbiISSNd (ORCPT ); Mon, 19 Sep 2022 14:13:33 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3CA2111829; Mon, 19 Sep 2022 11:13:32 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id E82F2B81AF4; Mon, 19 Sep 2022 18:13:30 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id D1751C43470; Mon, 19 Sep 2022 18:13:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1663611209; bh=efA1CI5eOVyKy7cjXgpsD9blr8sPtb3UFq3HG0Pc0+Y=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=X//UfQHzk5E0JvfMhDcQzujwBePorEFPZIFZe94xkAnBPdVNUsGCL4/mTQRdqwYyO vuxSzUzzpl/1LZGUXpozoxbhEMrBrcYXHex8UI4hKNFBoiw106TGwT6U7fC48as71B ysWjORPHuLXU3EtvPz6bKdD4KvCWon6GE5UN9ARVD0JSitJIzTeJRWgJS4WhFwFkeC g7Z9FzMjXpr0QxaP6hgekTYpFkzDvR/uOfWv26P5S2A3llgw1l7WvInXFH/o1ogi8M YQpIJq+DwUBUFwHeFuuz/bU05gacGp26iEPOD7KOz/YycyWId/k7s76YW1XVEw3IdK yUmMIKmXwdTJA== From: Dinh Nguyen To: jh80.chung@samsung.com Cc: dinguyen@kernel.org, ulf.hansson@linaro.org, robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, linux-mmc@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org Subject: [PATCH 2/2] mmc: dw_mmc-pltfm: socfpga: add method to configure clk-phase Date: Mon, 19 Sep 2022 13:13:09 -0500 Message-Id: <20220919181309.286611-2-dinguyen@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220919181309.286611-1-dinguyen@kernel.org> References: <20220919181309.286611-1-dinguyen@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-mmc@vger.kernel.org The clock-phase settings for the SDMMC controller in the SoCFPGA Strarix10/Agilex/N5X platforms reside in a register in the System Manager. Add a method to access that register through the syscon interface. Signed-off-by: Dinh Nguyen --- drivers/mmc/host/dw_mmc-pltfm.c | 68 ++++++++++++++++++++++++++++++++- 1 file changed, 67 insertions(+), 1 deletion(-) diff --git a/drivers/mmc/host/dw_mmc-pltfm.c b/drivers/mmc/host/dw_mmc-pltfm.c index 9901208be797..9e3237c18a9d 100644 --- a/drivers/mmc/host/dw_mmc-pltfm.c +++ b/drivers/mmc/host/dw_mmc-pltfm.c @@ -17,10 +17,15 @@ #include #include #include +#include +#include #include "dw_mmc.h" #include "dw_mmc-pltfm.h" +#define SYSMGR_SDMMC_CTRL_SET(smplsel, drvsel) \ + ((((smplsel) & 0x7) << 4) | (((drvsel) & 0x7) << 0)) + int dw_mci_pltfm_register(struct platform_device *pdev, const struct dw_mci_drv_data *drv_data) { @@ -62,9 +67,70 @@ const struct dev_pm_ops dw_mci_pltfm_pmops = { }; EXPORT_SYMBOL_GPL(dw_mci_pltfm_pmops); +static int dw_mci_socfpga_priv_init(struct dw_mci *host) +{ + struct device_node *np = host->dev->of_node; + struct regmap *sys_mgr_base_addr; + u32 clk_phase[2] = {0}, reg_offset; + int i, rc, hs_timing; + + rc = of_property_read_variable_u32_array(np, "clk-phase-sd-hs", &clk_phase[0], 2, 0); + if (rc) { + sys_mgr_base_addr = + altr_sysmgr_regmap_lookup_by_phandle(np, "altr,sysmgr-syscon"); + if (IS_ERR(sys_mgr_base_addr)) { + pr_err("%s: failed to find altr,sys-mgr regmap!\n", __func__); + return 1; + } + } else + return 1; + + of_property_read_u32_index(np, "altr,sysmgr-syscon", 1, ®_offset); + + for (i = 0; i < ARRAY_SIZE(clk_phase); i++) { + switch (clk_phase[i]) { + case 0: + clk_phase[i] = 0; + break; + case 45: + clk_phase[i] = 1; + break; + case 90: + clk_phase[i] = 2; + break; + case 135: + clk_phase[i] = 3; + break; + case 180: + clk_phase[i] = 4; + break; + case 225: + clk_phase[i] = 5; + break; + case 270: + clk_phase[i] = 6; + break; + case 315: + clk_phase[i] = 7; + break; + default: + clk_phase[i] = 0; + break; + } + } + hs_timing = SYSMGR_SDMMC_CTRL_SET(clk_phase[0], clk_phase[1]); + regmap_write(sys_mgr_base_addr, reg_offset, hs_timing); + + return 0; +} + +static const struct dw_mci_drv_data socfpga_drv_data = { + .init = dw_mci_socfpga_priv_init, +}; + static const struct of_device_id dw_mci_pltfm_match[] = { { .compatible = "snps,dw-mshc", }, - { .compatible = "altr,socfpga-dw-mshc", }, + { .compatible = "altr,socfpga-dw-mshc", .data = &socfpga_drv_data, }, { .compatible = "img,pistachio-dw-mshc", }, {}, };