From mboxrd@z Thu Jan 1 00:00:00 1970 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=-12.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 240CBC4167B for ; Sun, 6 Dec 2020 21:00:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id F059F22D08 for ; Sun, 6 Dec 2020 20:59:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727953AbgLFU7y (ORCPT ); Sun, 6 Dec 2020 15:59:54 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48106 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726731AbgLFU7y (ORCPT ); Sun, 6 Dec 2020 15:59:54 -0500 Received: from mail-io1-xd41.google.com (mail-io1-xd41.google.com [IPv6:2607:f8b0:4864:20::d41]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B367CC0613D0; Sun, 6 Dec 2020 12:59:13 -0800 (PST) Received: by mail-io1-xd41.google.com with SMTP id q137so11388789iod.9; Sun, 06 Dec 2020 12:59:13 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc:content-transfer-encoding; bh=d6BRn7qihcauXjMDGzCvXnL71Mb/VmGjXDz8MROhlHk=; b=m+rm8fkK8CPvVFookoUg7lSnLJD5HvqLaOzuUKEyIW9guDx7K3wLm45UHfWwrmsdOX zm/d61/jfJL7QDyQxMPfp13kVRhlEcNDmce7pV6Tu2iIZcUcLpeVR6oJCcnBOPGzwW7I Z5q1F1Efpfn3wdQ902cCE+nmPK5KCj53LyNsHieHbJbHX1pAP38j9CGiVcm63KR7kmdt VyePJmXIqPU4CftiNwTO3mLZIGF3aw6YgXg/+6Y+mj2Rs2OnMBgo9gdouVCT8O25v13X OQ8oXrQuJ//j0744PqnV6zIXkI6ttDHZ2Gax/TlnGwXV1qMiCXFj1CBzjvhyuCpsZgtk uQcQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc:content-transfer-encoding; bh=d6BRn7qihcauXjMDGzCvXnL71Mb/VmGjXDz8MROhlHk=; b=hiZ/FmQXp4UdBxogYoQB8nDl545c35w1/jms9T3VHefqLVYNutchjobgqjRsyHd5eL M3B+vgeaUSH9tbqtdXnsvUG4PXej0jShZx1HzU/9m3sOEJ22zYwslg5gn19zE+/7tIqm vEGtXFj9SuNvXv7QsdnwMQHlGUKKompu7v7qvKVMRyE569EyFmTjvJxI5uz5rJnVKdNC L3+CdM5s+k7my1T0RH6Euch3viw82Vdl50mAb2I2/Je0PHRKL6tTjDx11EaMW7Sirqfl /sH/By5oDMcCdX4bQfRPN8imH4KmD9+yD3V366Cj6dirPeYUBORpyBT39OhRVI7gUYpI UNZw== X-Gm-Message-State: AOAM532fPxkKS1w29MhWZLCRqgzvTdVTqOYHDgL3qcjvb0KnuM6JQMAn xfgAH9PcvyFU+66OhC8cl37hbcwq8ANKiApiBjE= X-Google-Smtp-Source: ABdhPJzE54kWFUqCTS6AEHWQBP4v9lcCjLyuSTiIvnhN7o6HJIPZn0iDKhK7hYQJu2j9WmeX/FVlAMVOazhd2DeZRtk= X-Received: by 2002:a5d:9b97:: with SMTP id r23mr14654441iom.123.1607288352988; Sun, 06 Dec 2020 12:59:12 -0800 (PST) MIME-Version: 1.0 References: <20201204070901.24592-1-huangshuosheng@allwinnertech.com> <388512ba-9e2b-acad-8487-5c26a6eb101b@gmail.com> In-Reply-To: <388512ba-9e2b-acad-8487-5c26a6eb101b@gmail.com> From: =?UTF-8?B?Q2zDqW1lbnQgUMOpcm9u?= Date: Sun, 6 Dec 2020 21:59:01 +0100 Message-ID: Subject: Re: [PATCH 1/2] cpufreq: sun50i: add a100 cpufreq support To: Shuosheng Huang , Rob Herring , Maxime Ripard , Chen-Yu Tsai , Jernej Skrabec , "Rafael J. Wysocki" , Viresh Kumar , Yangtao Li Cc: devicetree , linux-kernel , linux-arm-kernel , "open list:ALLWINNER CPUFREQ DRIVER" Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Shuosheng, On Sun, 6 Dec 2020 at 21:49, Cl=C3=A9ment P=C3=A9ron = wrote: > > Hi Shuosheng, > > On 04/12/2020 08:09, Shuosheng Huang wrote: > > Let's add cpufreq nvmem based for allwinner a100 soc. It's similar to h= 6, > > let us use efuse_xlate to extract the differentiated part. > > So you introduce 2 modifications here. > In this case it's better to have 2 patches. > One to introduce the efuse_xlate > And one to introduce the A100 support. > > Regards, > Clement > > > > > Signed-off-by: Shuosheng Huang > > --- > > drivers/cpufreq/cpufreq-dt-platdev.c | 1 + > > drivers/cpufreq/sun50i-cpufreq-nvmem.c | 81 ++++++++++++++++++++-----= - > > 2 files changed, 64 insertions(+), 18 deletions(-) > > > > diff --git a/drivers/cpufreq/cpufreq-dt-platdev.c b/drivers/cpufreq/cpu= freq-dt-platdev.c > > index 3776d960f405..2ebf5d9cb616 100644 > > --- a/drivers/cpufreq/cpufreq-dt-platdev.c > > +++ b/drivers/cpufreq/cpufreq-dt-platdev.c > > @@ -102,6 +102,7 @@ static const struct of_device_id whitelist[] __init= const =3D { > > */ > > static const struct of_device_id blacklist[] __initconst =3D { > > { .compatible =3D "allwinner,sun50i-h6", }, > > + { .compatible =3D "allwinner,sun50i-a100", }, > > > > { .compatible =3D "calxeda,highbank", }, > > { .compatible =3D "calxeda,ecx-2000", }, > > diff --git a/drivers/cpufreq/sun50i-cpufreq-nvmem.c b/drivers/cpufreq/s= un50i-cpufreq-nvmem.c > > index 9907a165135b..044e44a763f5 100644 > > --- a/drivers/cpufreq/sun50i-cpufreq-nvmem.c > > +++ b/drivers/cpufreq/sun50i-cpufreq-nvmem.c > > @@ -21,21 +21,63 @@ > > > > #define NVMEM_MASK 0x7 > > #define NVMEM_SHIFT 5 > > +#define SUN50I_A100_NVMEM_MASK 0xf > > +#define SUN50I_A100_NVMEM_SHIFT 12 > > + > > +#define SUN50I_H6_NVMEM_MASK 0x7 > > +#define SUN50I_H6_NVMEM_SHIFT 5 > > + > > +struct sunxi_cpufreq_soc_data { > > + u32 (*efuse_xlate)(void *efuse); Maybe it's better to pass the speedbin_nvmem. And call nvmem_cell_read_u16 or nvmem_cell_read_u32 regarding the SoC. But I'm not a Maintainer. Clement > > +}; > > > > static struct platform_device *cpufreq_dt_pdev, *sun50i_cpufreq_pdev; > > > > +static u32 sun50i_a100_efuse_xlate(void *efuse) > > +{ > > + u32 efuse_value =3D (*(u16 *)efuse >> SUN50I_A100_NVMEM_SHIFT) & > > + SUN50I_A100_NVMEM_MASK; > > + > > + switch (efuse_value) { > > + case 0b100: > > + return 2; > > + case 0b010: > > + return 1; > > + default: > > + return 0; > > + } > > +} > > + > > +static u32 sun50i_h6_efuse_xlate(void *efuse) > > +{ > > + u32 efuse_value =3D (*(u32 *)efuse >> SUN50I_H6_NVMEM_SHIFT) & > > + SUN50I_H6_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 >=3D 1 && efuse_value <=3D 3) > > + return efuse_value - 1; > > + else > > + return 0; > > +} > > + > > /** > > * sun50i_cpufreq_get_efuse() - Determine speed grade from efuse valu= e > > + * @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_dat= a *soc_data, > > + u32 *versions) > > { > > struct nvmem_cell *speedbin_nvmem; > > struct device_node *np; > > struct device *cpu_dev; > > - u32 *speedbin, efuse_value; > > + u32 *speedbin; > > size_t len; > > int ret; > > > > @@ -68,17 +110,7 @@ static int sun50i_cpufreq_get_efuse(u32 *versions) > > if (IS_ERR(speedbin)) > > return PTR_ERR(speedbin); > > > > - efuse_value =3D (*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 >=3D 1 && efuse_value <=3D 3) > > - *versions =3D efuse_value - 1; > > - else > > - *versions =3D 0; > > + *versions =3D soc_data->efuse_xlate(speedbin); > > > > kfree(speedbin); > > return 0; > > @@ -86,18 +118,23 @@ static int sun50i_cpufreq_get_efuse(u32 *versions) > > > > 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 =3D 0; > > int ret; > > > > + match =3D dev_get_platdata(&pdev->dev); > > + if (!match) > > + return -EINVAL; > > + > > opp_tables =3D kcalloc(num_possible_cpus(), sizeof(*opp_tables), > > GFP_KERNEL); > > if (!opp_tables) > > return -ENOMEM; > > > > - ret =3D sun50i_cpufreq_get_efuse(&speed); > > + ret =3D sun50i_cpufreq_get_efuse(match->data, &speed); > > if (ret) > > return ret; > > > > @@ -163,8 +200,17 @@ static struct platform_driver sun50i_cpufreq_drive= r =3D { > > }, > > }; > > > > +static const struct sunxi_cpufreq_soc_data sun50i_a100_data =3D { > > + .efuse_xlate =3D sun50i_a100_efuse_xlate, > > +}; > > + > > +static const struct sunxi_cpufreq_soc_data sun50i_h6_data =3D { > > + .efuse_xlate =3D sun50i_h6_efuse_xlate, > > +}; > > + > > static const struct of_device_id sun50i_cpufreq_match_list[] =3D { > > - { .compatible =3D "allwinner,sun50i-h6" }, > > + { .compatible =3D "allwinner,sun50i-h6", .data =3D &sun50i_h6_dat= a }, > > + { .compatible =3D "allwinner,sun50i-a100", .data =3D &sun50i_a100= _data > {} > > }; > > > > @@ -198,9 +244,8 @@ static int __init sun50i_cpufreq_init(void) > > if (unlikely(ret < 0)) > > return ret; > > > > - sun50i_cpufreq_pdev =3D > > - platform_device_register_simple("sun50i-cpufreq-nvmem", > > - -1, NULL, 0); > > + sun50i_cpufreq_pdev =3D platform_device_register_data(NULL, > > + "sun50i-cpufreq-nvmem", -1, match, sizeof(*match)); > > ret =3D PTR_ERR_OR_ZERO(sun50i_cpufreq_pdev); > > if (ret =3D=3D 0) > > return 0; > > From mboxrd@z Thu Jan 1 00:00:00 1970 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=-10.7 required=3.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED,DKIM_SIGNED,DKIM_VALID,FREEMAIL_FORGED_FROMDOMAIN, FREEMAIL_FROM,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=ham 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 6AB0CC433FE for ; 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Sun, 06 Dec 2020 12:59:12 -0800 (PST) MIME-Version: 1.0 References: <20201204070901.24592-1-huangshuosheng@allwinnertech.com> <388512ba-9e2b-acad-8487-5c26a6eb101b@gmail.com> In-Reply-To: <388512ba-9e2b-acad-8487-5c26a6eb101b@gmail.com> From: =?UTF-8?B?Q2zDqW1lbnQgUMOpcm9u?= Date: Sun, 6 Dec 2020 21:59:01 +0100 Message-ID: Subject: Re: [PATCH 1/2] cpufreq: sun50i: add a100 cpufreq support To: Shuosheng Huang , Rob Herring , Maxime Ripard , Chen-Yu Tsai , Jernej Skrabec , "Rafael J. Wysocki" , Viresh Kumar , Yangtao Li X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20201206_155919_540518_D540724D X-CRM114-Status: GOOD ( 26.31 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree , linux-kernel , linux-arm-kernel , "open list:ALLWINNER CPUFREQ DRIVER" Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org SGkgU2h1b3NoZW5nLAoKT24gU3VuLCA2IERlYyAyMDIwIGF0IDIxOjQ5LCBDbMOpbWVudCBQw6ly b24gPHBlcm9uLmNsZW1AZ21haWwuY29tPiB3cm90ZToKPgo+IEhpIFNodW9zaGVuZywKPgo+IE9u IDA0LzEyLzIwMjAgMDg6MDksIFNodW9zaGVuZyBIdWFuZyB3cm90ZToKPiA+IExldCdzIGFkZCBj cHVmcmVxIG52bWVtIGJhc2VkIGZvciBhbGx3aW5uZXIgYTEwMCBzb2MuIEl0J3Mgc2ltaWxhciB0 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