From patchwork Mon Dec 7 09:17:16 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shuosheng Huang X-Patchwork-Id: 11955175 X-Patchwork-Delegate: viresh.linux@gmail.com Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY,URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id DAAFDC2BB3F for ; Mon, 7 Dec 2020 09:18:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id ADF2623437 for ; Mon, 7 Dec 2020 09:18:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726415AbgLGJSH (ORCPT ); Mon, 7 Dec 2020 04:18:07 -0500 Received: from smtp2207-205.mail.aliyun.com ([121.197.207.205]:40085 "EHLO smtp2207-205.mail.aliyun.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726480AbgLGJSH (ORCPT ); Mon, 7 Dec 2020 04:18:07 -0500 X-Alimail-AntiSpam: AC=CONTINUE;BC=0.07437193|-1;CH=green;DM=|CONTINUE|false|;DS=CONTINUE|ham_system_inform|0.0217741-0.00249463-0.975731;FP=0|0|0|0|0|-1|-1|-1;HT=ay29a033018047206;MF=huangshuosheng@allwinnertech.com;NM=1;PH=DS;RN=10;RT=10;SR=0;TI=SMTPD_---.J42KvvE_1607332641; Received: from allwinnertech.com(mailfrom:huangshuosheng@allwinnertech.com fp:SMTPD_---.J42KvvE_1607332641) by smtp.aliyun-inc.com(10.147.43.230); Mon, 07 Dec 2020 17:17:25 +0800 From: Shuosheng Huang To: tiny.windzz@gmail.com, rjw@rjwysocki.net, viresh.kumar@linaro.org, mripard@kernel.org, wens@csie.org, jernej.skrabec@siol.net Cc: linux-pm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Shuosheng Huang Subject: [PATCH V2 1/3] cpufreq: sun50i: add efuse_xlate to get efuse version. Date: Mon, 7 Dec 2020 17:17:16 +0800 Message-Id: <20201207091716.17492-1-huangshuosheng@allwinnertech.com> X-Mailer: git-send-email 2.28.0 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org It's better to use efuse_xlate to extract the differentiated part regarding different SoC. Signed-off-by: Shuosheng Huang --- drivers/cpufreq/sun50i-cpufreq-nvmem.c | 72 +++++++++++++++++--------- 1 file changed, 48 insertions(+), 24 deletions(-) diff --git a/drivers/cpufreq/sun50i-cpufreq-nvmem.c b/drivers/cpufreq/sun50i-cpufreq-nvmem.c index 9907a165135b..da23d581a4b4 100644 --- a/drivers/cpufreq/sun50i-cpufreq-nvmem.c +++ b/drivers/cpufreq/sun50i-cpufreq-nvmem.c @@ -22,21 +22,52 @@ #define NVMEM_MASK 0x7 #define NVMEM_SHIFT 5 +#define SUN50I_H6_NVMEM_MASK 0x7 +#define SUN50I_H6_NVMEM_SHIFT 5 + +struct sunxi_cpufreq_soc_data { + u32 (*efuse_xlate)(void *efuse); +}; + static struct platform_device *cpufreq_dt_pdev, *sun50i_cpufreq_pdev; +static u32 sun50i_h6_efuse_xlate(struct nvmem_cell *speedbin_nvmem) +{ + size_t len; + u32 *speedbin; + u32 efuse_value; + + speedbin = nvmem_cell_read(speedbin_nvmem, &len); + if (IS_ERR(speedbin)) + return PTR_ERR(speedbin); + + efuse_value = (*(u32 *)speedbin >> SUN50I_H6_NVMEM_SHIFT) & + SUN50I_H6_NVMEM_MASK; + kfree(speedbin); + /* + * We treat unexpected efuse values as if the SoC was from + * the slowest bin. Expected efuse values are 1-3, slowest + * to fastest. + */ + if (efuse_value >= 1 && efuse_value <= 3) + return efuse_value - 1; + else + return 0; +} + /** * sun50i_cpufreq_get_efuse() - Determine speed grade from efuse value + * @soc_data: pointer to sunxi_cpufreq_soc_data context * @versions: Set to the value parsed from efuse * * Returns 0 if success. */ -static int sun50i_cpufreq_get_efuse(u32 *versions) +static int sun50i_cpufreq_get_efuse(const struct sunxi_cpufreq_soc_data *soc_data, + u32 *versions) { struct nvmem_cell *speedbin_nvmem; struct device_node *np; struct device *cpu_dev; - u32 *speedbin, efuse_value; - size_t len; int ret; cpu_dev = get_cpu_device(0); @@ -63,41 +94,31 @@ static int sun50i_cpufreq_get_efuse(u32 *versions) return PTR_ERR(speedbin_nvmem); } - speedbin = nvmem_cell_read(speedbin_nvmem, &len); + *versions = soc_data->efuse_xlate(speedbin_nvmem); nvmem_cell_put(speedbin_nvmem); - if (IS_ERR(speedbin)) - return PTR_ERR(speedbin); - - efuse_value = (*speedbin >> NVMEM_SHIFT) & NVMEM_MASK; - - /* - * We treat unexpected efuse values as if the SoC was from - * the slowest bin. Expected efuse values are 1-3, slowest - * to fastest. - */ - if (efuse_value >= 1 && efuse_value <= 3) - *versions = efuse_value - 1; - else - *versions = 0; - kfree(speedbin); return 0; }; static int sun50i_cpufreq_nvmem_probe(struct platform_device *pdev) { + const struct of_device_id *match; struct opp_table **opp_tables; char name[MAX_NAME_LEN]; unsigned int cpu; u32 speed = 0; int ret; + match = dev_get_platdata(&pdev->dev); + if (!match) + return -EINVAL; + opp_tables = kcalloc(num_possible_cpus(), sizeof(*opp_tables), GFP_KERNEL); if (!opp_tables) return -ENOMEM; - ret = sun50i_cpufreq_get_efuse(&speed); + ret = sun50i_cpufreq_get_efuse(match->data, &speed); if (ret) return ret; @@ -163,8 +184,12 @@ static struct platform_driver sun50i_cpufreq_driver = { }, }; +static const struct sunxi_cpufreq_soc_data sun50i_h6_data = { + .efuse_xlate = sun50i_h6_efuse_xlate, +}; + static const struct of_device_id sun50i_cpufreq_match_list[] = { - { .compatible = "allwinner,sun50i-h6" }, + { .compatible = "allwinner,sun50i-h6", .data = &sun50i_h6_data }, {} }; @@ -198,9 +223,8 @@ static int __init sun50i_cpufreq_init(void) if (unlikely(ret < 0)) return ret; - sun50i_cpufreq_pdev = - platform_device_register_simple("sun50i-cpufreq-nvmem", - -1, NULL, 0); + sun50i_cpufreq_pdev = platform_device_register_data(NULL, + "sun50i-cpufreq-nvmem", -1, match, sizeof(*match)); ret = PTR_ERR_OR_ZERO(sun50i_cpufreq_pdev); if (ret == 0) return 0;