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 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 0558AC77B61 for ; Thu, 27 Apr 2023 09:13:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:CC:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=668d8PuEo2rGgy/06KUyNJmHRZdKHZOICTcXy8JFdak=; b=yzvy/UU6QcTQuz KG2f1z5dJ77LDRCA8Crf3rlRLGGd6986X9+IzprlqG8AgNLcwMvucUK5NPLjbm9ya62v9Mg135YRp p//Q3+0mpelKaTUU9q5OHF+ruAxgOr+m9aw5sRsNoRFvHZFKMQJqF01/omvAYWKYE87mcVedElOmO 0w5frTgg+GqTmevz0+QMoC2JCxcGTkj7SsG0FRcfo9UyTMzIptFpIxI9jJx7CPu7ckraOHrC2nKQR gfFftyZuaizWuxewqMR6MImg5nmBVE8dbKRO44Bt/1FG0eAoT236CYGSQjO0G35XouyOzCJSG9zu/ CnlTJNcYzxcAhUj+UHXg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1prxfO-005wGC-1d; Thu, 27 Apr 2023 09:11:54 +0000 Received: from desiato.infradead.org ([2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1prxfM-005wFg-0n; Thu, 27 Apr 2023 09:11:52 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:CC:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=i8FGLnAKrdz6rTfVtekEGXQZragW7XhoCO1AcVIACxY=; b=gG3R57dnTLcgKWRAPM2PZiyXHd jGZ9CEfnWU7P1XoeG9ekbD5d1upL4hMymJ6V2wx9P4D1RM/xesZUGDY7TLlDfWpkGAmg89c+EOhzt dNc7KfIsNUIyi87DJNeFAZtXGQG2s4PPuGZbjB0Ualn+nkcCn0JVBk7ozgopY/E3FoVaj0ZeCtBJk DbleYO0br1Cx7g42p1DY+W7/bwbfFweAkepXkxN82dX2znYSM+q+R10oPh8/oC4AvvZ2gkLbOMrXc S9enEOpGpr2TlyUVhfwtstg1ex8Vhctn0e+BfHcFbIaULZiWDfjUt40mqCBzxBn6Sb/hUHjllkCmm ZrZfD9Eg==; Received: from mx.sberdevices.ru ([45.89.227.171]) by desiato.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1prxfG-00CIvr-2x; Thu, 27 Apr 2023 09:11:50 +0000 Received: from s-lin-edge02.sberdevices.ru (localhost [127.0.0.1]) by mx.sberdevices.ru (Postfix) with ESMTP id 919BE5FD10; Thu, 27 Apr 2023 12:11:42 +0300 (MSK) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sberdevices.ru; s=mail; t=1682586702; bh=i8FGLnAKrdz6rTfVtekEGXQZragW7XhoCO1AcVIACxY=; h=Date:From:To:Subject:Message-ID:MIME-Version:Content-Type; b=G/HxEd3euRdvpAbx8Kn1eM+RgaNfucWCf5EsCCZpQpj7eZZZzzHK2xHzp6VuyLL1z R+lalU8dhzSm63C03aWy0B94t0+PcZVx013UyrEwGiSBxu6hxZyiKD9auta4l0yQB4 rGGHICFi46W/sMF26phdLtxhvrsBDmfnWXadrk62kEhFwLIwpY4yfOgmOrI01KPAR/ qzbpamom+wUzIWQY8QBXs4rf+yHqWrzRfXXI+l20Z3ze5KTJ2+RBRcEql1MjB8YlgZ mURQ+B5BG1SzBz0JFRd40mVERQV9jAgaY4V/HphVvxd7Upd+aUlOSduCBYr1R/nYYE UrFefmito+vBA== Received: from S-MS-EXCH01.sberdevices.ru (S-MS-EXCH01.sberdevices.ru [172.16.1.4]) by mx.sberdevices.ru (Postfix) with ESMTP; Thu, 27 Apr 2023 12:11:42 +0300 (MSK) Date: Thu, 27 Apr 2023 12:11:41 +0300 From: Dmitry Rokosov To: Yu Tu CC: , , , , , Rob Herring , Neil Armstrong , Jerome Brunet , Kevin Hilman , Michael Turquette , Stephen Boyd , Krzysztof Kozlowski , Martin Blumenstingl , , Subject: Re: [PATCH V7 3/4] clk: meson: S4: add support for Amlogic S4 SoC PLL clock driver Message-ID: <20230427091141.q3fky7ywnu4lsddk@CAB-WSD-L081021> References: <20230417065005.24967-1-yu.tu@amlogic.com> <20230417065005.24967-4-yu.tu@amlogic.com> <20230426111358.xh3gbhlvxj46ggi5@CAB-WSD-L081021> <3be758e3-aa41-0003-fd1a-324b8dd4267a@amlogic.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <3be758e3-aa41-0003-fd1a-324b8dd4267a@amlogic.com> User-Agent: NeoMutt/20220415 X-Originating-IP: [172.16.1.6] X-ClientProxiedBy: S-MS-EXCH02.sberdevices.ru (172.16.1.5) To S-MS-EXCH01.sberdevices.ru (172.16.1.4) X-KSMG-Rule-ID: 4 X-KSMG-Message-Action: clean X-KSMG-AntiSpam-Status: not scanned, disabled by settings X-KSMG-AntiSpam-Interceptor-Info: not scanned X-KSMG-AntiPhishing: not scanned, disabled by settings X-KSMG-AntiVirus: Kaspersky Secure Mail Gateway, version 1.1.2.30, bases: 2023/04/27 05:34:00 #21173123 X-KSMG-AntiVirus-Status: Clean, skipped X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230427_101147_401497_18CEF784 X-CRM114-Status: GOOD ( 32.85 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Thu, Apr 27, 2023 at 04:38:20PM +0800, Yu Tu wrote: > > > On 2023/4/26 19:13, Dmitry Rokosov wrote: > > [Some people who received this message don't often get email from ddrokosov@sberdevices.ru. Learn why this is important at https://aka.ms/LearnAboutSenderIdentification ] > > > > [ EXTERNAL EMAIL ] > > > > On Mon, Apr 17, 2023 at 02:50:04PM +0800, Yu Tu wrote: > > > Add the S4 PLL clock controller driver in the s4 SoC family. > > > > > > Signed-off-by: Yu Tu > > > --- > > > drivers/clk/meson/Kconfig | 13 + > > > drivers/clk/meson/Makefile | 1 + > > > drivers/clk/meson/s4-pll.c | 902 +++++++++++++++++++++++++++++++++++++ > > > drivers/clk/meson/s4-pll.h | 87 ++++ > > > 4 files changed, 1003 insertions(+) > > > create mode 100644 drivers/clk/meson/s4-pll.c > > > create mode 100644 drivers/clk/meson/s4-pll.h > > > > > > diff --git a/drivers/clk/meson/Kconfig b/drivers/clk/meson/Kconfig > > > index fc002c155bc3..a663c90a3f3b 100644 > > > --- a/drivers/clk/meson/Kconfig > > > +++ b/drivers/clk/meson/Kconfig > > > @@ -115,4 +115,17 @@ config COMMON_CLK_G12A > > > help > > > Support for the clock controller on Amlogic S905D2, S905X2 and S905Y2 > > > devices, aka g12a. Say Y if you want peripherals to work. > > > + > > > +config COMMON_CLK_S4_PLL > > > + tristate "S4 SoC PLL clock controllers support" > > > + depends on ARM64 > > > + default y > > > + select COMMON_CLK_MESON_MPLL > > > + select COMMON_CLK_MESON_PLL > > > + select COMMON_CLK_MESON_REGMAP > > > + help > > > + Support for the pll clock controller on Amlogic S805X2 and S905Y4 devices, > > > + aka s4. Amlogic S805X2 and S905Y4 devices include AQ222 and AQ229. > > > + Say Y if you want the board to work, because plls are the parent of most > > > + peripherals. > > > endmenu > > > diff --git a/drivers/clk/meson/Makefile b/drivers/clk/meson/Makefile > > > index 6eca2a406ee3..376f49cc13f1 100644 > > > --- a/drivers/clk/meson/Makefile > > > +++ b/drivers/clk/meson/Makefile > > > @@ -19,3 +19,4 @@ obj-$(CONFIG_COMMON_CLK_AXG_AUDIO) += axg-audio.o > > > obj-$(CONFIG_COMMON_CLK_GXBB) += gxbb.o gxbb-aoclk.o > > > obj-$(CONFIG_COMMON_CLK_G12A) += g12a.o g12a-aoclk.o > > > obj-$(CONFIG_COMMON_CLK_MESON8B) += meson8b.o meson8-ddr.o > > > +obj-$(CONFIG_COMMON_CLK_S4_PLL) += s4-pll.o > > > diff --git a/drivers/clk/meson/s4-pll.c b/drivers/clk/meson/s4-pll.c > > > new file mode 100644 > > > index 000000000000..5a34d304adf7 > > > --- /dev/null > > > +++ b/drivers/clk/meson/s4-pll.c > > > @@ -0,0 +1,902 @@ > > > +// SPDX-License-Identifier: GPL-2.0+ > > > +/* > > > + * Amlogic Meson-S4 PLL Clock Controller Driver > > > + * > > > + * Copyright (c) 2021 Amlogic, inc. > > > + * Author: Yu Tu > > > + */ > > > + > > > +#include > > > +#include > > > +#include > > > + > > > +#include "clk-mpll.h" > > > +#include "clk-pll.h" > > > +#include "clk-regmap.h" > > > +#include "s4-pll.h" > > > + > > > +static DEFINE_SPINLOCK(meson_clk_lock); > > > + > > > +static struct clk_regmap s4_fixed_pll_dco = { > > > + .data = &(struct meson_clk_pll_data){ > > > + .en = { > > > + .reg_off = ANACTRL_FIXPLL_CTRL0, > > > + .shift = 28, > > > + .width = 1, > > > + }, > > > + .m = { > > > + .reg_off = ANACTRL_FIXPLL_CTRL0, > > > + .shift = 0, > > > + .width = 8, > > > + }, > > > + .n = { > > > + .reg_off = ANACTRL_FIXPLL_CTRL0, > > > + .shift = 10, > > > + .width = 5, > > > + }, > > > + .frac = { > > > + .reg_off = ANACTRL_FIXPLL_CTRL1, > > > + .shift = 0, > > > + .width = 17, > > > + }, > > > + .l = { > > > + .reg_off = ANACTRL_FIXPLL_CTRL0, > > > + .shift = 31, > > > + .width = 1, > > > + }, > > > + .rst = { > > > + .reg_off = ANACTRL_FIXPLL_CTRL0, > > > + .shift = 29, > > > + .width = 1, > > > + }, > > > + }, > > > + .hw.init = &(struct clk_init_data){ > > > + .name = "fixed_pll_dco", > > > + /* > > > + * This clock is a fixed value (4GHz) that is initialized by ROMcode. > > > + * This clock won't ever change at runtime. > > > + * The chip design determines that this clock cannot be changed after > > > + * initialization. To prevent system crash caused by changing > > > + * fixed related register in kernel phase. This register is not > > > + * writable in the kernel phase. > > > + * So we use ro_ops. > > > + */ > > > + .ops = &meson_clk_pll_ro_ops, > > > + .parent_data = (const struct clk_parent_data []) { > > > + { .fw_name = "xtal", } > > > + }, > > > + .num_parents = 1, > > > + }, > > > +}; > > > + > > > +static struct clk_regmap s4_fixed_pll = { > > > + .data = &(struct clk_regmap_div_data){ > > > + .offset = ANACTRL_FIXPLL_CTRL0, > > > + .shift = 16, > > > + .width = 2, > > > + .flags = CLK_DIVIDER_POWER_OF_TWO, > > > + }, > > > + .hw.init = &(struct clk_init_data){ > > > + .name = "fixed_pll", > > > + /* > > > + * This clock is a fixed value (2GHz) that is initialized by ROMcode. > > > + * This clock won't ever change at runtime. > > > + * The chip design determines that this clock cannot be changed after > > > + * initialization. To prevent system crash caused by changing > > > + * fixed related register in kernel phase. This register is not > > > + * writable in the kernel phase. > > > + * So we use ro_ops. > > > + */ > > > + .ops = &clk_regmap_divider_ro_ops, > > > + .parent_hws = (const struct clk_hw *[]) { > > > + &s4_fixed_pll_dco.hw > > > + }, > > > + .num_parents = 1, > > > + /* > > > + * This clock won't ever change at runtime so > > > + * CLK_SET_RATE_PARENT is not required > > > + */ > > > + }, > > > +}; > > > + > > > +static struct clk_fixed_factor s4_fclk_div2_div = { > > > + .mult = 1, > > > + .div = 2, > > > + .hw.init = &(struct clk_init_data){ > > > + .name = "fclk_div2_div", > > > + .ops = &clk_fixed_factor_ops, > > > + .parent_hws = (const struct clk_hw *[]) { &s4_fixed_pll.hw }, > > > + .num_parents = 1, > > > + }, > > > +}; > > > + > > > +static struct clk_regmap s4_fclk_div2 = { > > > + .data = &(struct clk_regmap_gate_data){ > > > + .offset = ANACTRL_FIXPLL_CTRL1, > > > + .bit_idx = 24, > > > + }, > > > + .hw.init = &(struct clk_init_data){ > > > + .name = "fclk_div2", > > > + /* > > > + * This clock is a fixed value (1GHz) that is initialized by ROMcode. > > > + * This clock won't ever ungate at runtime. > > > + * The chip design determines that this clock cannot be changed after > > > + * initialization. To prevent system crash caused by changing > > > + * fixed related register in kernel phase. This register is not > > > + * writable in the kernel phase. > > > + * So we use ro_ops. > > > + */ > > > > The above comment has been copied and pasted many times. > > Please collapse it and refer to it from specific locations. > > Just three times. The goal is to make it clear to the viewer. > I think, reference to one time mentioned comment is clear for viewer too. Also Jerome has pointed to this problem for the A1 driver as well: https://lore.kernel.org/all/1jtty6o5so.fsf@starbuckisacylon.baylibre.com/ > > > > > + .ops = &clk_regmap_gate_ro_ops, > > > + .parent_hws = (const struct clk_hw *[]) { > > > + &s4_fclk_div2_div.hw > > > + }, > > > + .num_parents = 1, > > > + }, > > > +}; > > > + > > > +static struct clk_fixed_factor s4_fclk_div3_div = { > > > + .mult = 1, > > > + .div = 3, > > > + .hw.init = &(struct clk_init_data){ > > > + .name = "fclk_div3_div", > > > + .ops = &clk_fixed_factor_ops, > > > + .parent_hws = (const struct clk_hw *[]) { &s4_fixed_pll.hw }, > > > + .num_parents = 1, > > > + }, > > > +}; > > > + > > > +static struct clk_regmap s4_fclk_div3 = { > > > + .data = &(struct clk_regmap_gate_data){ > > > + .offset = ANACTRL_FIXPLL_CTRL1, > > > + .bit_idx = 20, > > > + }, > > > + .hw.init = &(struct clk_init_data){ > > > + .name = "fclk_div3", > > > + .ops = &clk_regmap_gate_ro_ops, > > > + .parent_hws = (const struct clk_hw *[]) { > > > + &s4_fclk_div3_div.hw > > > + }, > > > + .num_parents = 1, > > > + }, > > > +}; > > > + > > > +static struct clk_fixed_factor s4_fclk_div4_div = { > > > + .mult = 1, > > > + .div = 4, > > > + .hw.init = &(struct clk_init_data){ > > > + .name = "fclk_div4_div", > > > + .ops = &clk_fixed_factor_ops, > > > + .parent_hws = (const struct clk_hw *[]) { &s4_fixed_pll.hw }, > > > + .num_parents = 1, > > > + }, > > > +}; > > > + > > > +static struct clk_regmap s4_fclk_div4 = { > > > + .data = &(struct clk_regmap_gate_data){ > > > + .offset = ANACTRL_FIXPLL_CTRL1, > > > + .bit_idx = 21, > > > + }, > > > + .hw.init = &(struct clk_init_data){ > > > + .name = "fclk_div4", > > > + .ops = &clk_regmap_gate_ro_ops, > > > + .parent_hws = (const struct clk_hw *[]) { > > > + &s4_fclk_div4_div.hw > > > + }, > > > + .num_parents = 1, > > > + }, > > > +}; > > > + > > > +static struct clk_fixed_factor s4_fclk_div5_div = { > > > + .mult = 1, > > > + .div = 5, > > > + .hw.init = &(struct clk_init_data){ > > > + .name = "fclk_div5_div", > > > + .ops = &clk_fixed_factor_ops, > > > + .parent_hws = (const struct clk_hw *[]) { &s4_fixed_pll.hw }, > > > + .num_parents = 1, > > > + }, > > > +}; > > > + > > > +static struct clk_regmap s4_fclk_div5 = { > > > + .data = &(struct clk_regmap_gate_data){ > > > + .offset = ANACTRL_FIXPLL_CTRL1, > > > + .bit_idx = 22, > > > + }, > > > + .hw.init = &(struct clk_init_data){ > > > + .name = "fclk_div5", > > > + .ops = &clk_regmap_gate_ro_ops, > > > + .parent_hws = (const struct clk_hw *[]) { > > > + &s4_fclk_div5_div.hw > > > + }, > > > + .num_parents = 1, > > > + }, > > > +}; > > > + > > > +static struct clk_fixed_factor s4_fclk_div7_div = { > > > + .mult = 1, > > > + .div = 7, > > > + .hw.init = &(struct clk_init_data){ > > > + .name = "fclk_div7_div", > > > + .ops = &clk_fixed_factor_ops, > > > + .parent_hws = (const struct clk_hw *[]) { &s4_fixed_pll.hw }, > > > + .num_parents = 1, > > > + }, > > > +}; > > > + > > > +static struct clk_regmap s4_fclk_div7 = { > > > + .data = &(struct clk_regmap_gate_data){ > > > + .offset = ANACTRL_FIXPLL_CTRL1, > > > + .bit_idx = 23, > > > + }, > > > + .hw.init = &(struct clk_init_data){ > > > + .name = "fclk_div7", > > > + .ops = &clk_regmap_gate_ro_ops, > > > + .parent_hws = (const struct clk_hw *[]) { > > > + &s4_fclk_div7_div.hw > > > + }, > > > + .num_parents = 1, > > > + }, > > > +}; > > > + > > > +static struct clk_fixed_factor s4_fclk_div2p5_div = { > > > + .mult = 2, > > > + .div = 5, > > > + .hw.init = &(struct clk_init_data){ > > > + .name = "fclk_div2p5_div", > > > + .ops = &clk_fixed_factor_ops, > > > + .parent_hws = (const struct clk_hw *[]) { > > > + &s4_fixed_pll.hw > > > + }, > > > + .num_parents = 1, > > > + }, > > > +}; > > > + > > > +static struct clk_regmap s4_fclk_div2p5 = { > > > + .data = &(struct clk_regmap_gate_data){ > > > + .offset = ANACTRL_FIXPLL_CTRL1, > > > + .bit_idx = 25, > > > + }, > > > + .hw.init = &(struct clk_init_data){ > > > + .name = "fclk_div2p5", > > > + .ops = &clk_regmap_gate_ro_ops, > > > + .parent_hws = (const struct clk_hw *[]) { > > > + &s4_fclk_div2p5_div.hw > > > + }, > > > + .num_parents = 1, > > > + }, > > > +}; > > > + > > > +static const struct pll_mult_range s4_gp0_pll_mult_range = { > > > + .min = 125, > > > + .max = 250, > > > +}; > > > + > > > +/* > > > + * Internal gp0 pll emulation configuration parameters > > > + */ > > > +static const struct reg_sequence s4_gp0_init_regs[] = { > > > + { .reg = ANACTRL_GP0PLL_CTRL1, .def = 0x00000000 }, > > > + { .reg = ANACTRL_GP0PLL_CTRL2, .def = 0x00000000 }, > > > + { .reg = ANACTRL_GP0PLL_CTRL3, .def = 0x48681c00 }, > > > + { .reg = ANACTRL_GP0PLL_CTRL4, .def = 0x88770290 }, > > > + { .reg = ANACTRL_GP0PLL_CTRL5, .def = 0x39272000 }, > > > + { .reg = ANACTRL_GP0PLL_CTRL6, .def = 0x56540000 } > > > > Please ensure that the initialization sequence values do not overlap > > with the below pll_data bits that are managed during runtime. > > > > That's right. There is a timing requirement for PLL initialization. > Okay, we have already discussed this in another patch series for A1 clock drivers, and some overlaps were found. I just want to help you find potential problems. You can find the discussion here: https://lore.kernel.org/linux-amlogic/1jr0u2azfi.fsf@starbuckisacylon.baylibre.com/ > > > +}; > > > + > > > +static struct clk_regmap s4_gp0_pll_dco = { > > > + .data = &(struct meson_clk_pll_data){ > > > + .en = { > > > + .reg_off = ANACTRL_GP0PLL_CTRL0, > > > + .shift = 28, > > > + .width = 1, > > > + }, > > > + .m = { > > > + .reg_off = ANACTRL_GP0PLL_CTRL0, > > > + .shift = 0, > > > + .width = 8, > > > + }, > > > + .n = { > > > + .reg_off = ANACTRL_GP0PLL_CTRL0, > > > + .shift = 10, > > > + .width = 5, > > > + }, > > > + .frac = { > > > + .reg_off = ANACTRL_GP0PLL_CTRL1, > > > + .shift = 0, > > > + .width = 17, > > > + }, > > > + .l = { > > > + .reg_off = ANACTRL_GP0PLL_CTRL0, > > > + .shift = 31, > > > + .width = 1, > > > + }, > > > + .rst = { > > > + .reg_off = ANACTRL_GP0PLL_CTRL0, > > > + .shift = 29, > > > + .width = 1, > > > + }, > > > + .range = &s4_gp0_pll_mult_range, > > > + .init_regs = s4_gp0_init_regs, > > > + .init_count = ARRAY_SIZE(s4_gp0_init_regs), > > > + }, > > > + .hw.init = &(struct clk_init_data){ > > > + .name = "gp0_pll_dco", > > > + .ops = &meson_clk_pll_ops, > > > + .parent_data = (const struct clk_parent_data []) { > > > + { .fw_name = "xtal", } > > > + }, > > > + .num_parents = 1, > > > + }, > > > +}; > > > + > > > +static struct clk_regmap s4_gp0_pll = { > > > + .data = &(struct clk_regmap_div_data){ > > > + .offset = ANACTRL_GP0PLL_CTRL0, > > > + .shift = 16, > > > + .width = 3, > > > + .flags = (CLK_DIVIDER_POWER_OF_TWO | > > > + CLK_DIVIDER_ROUND_CLOSEST), > > > + }, > > > + .hw.init = &(struct clk_init_data){ > > > + .name = "gp0_pll", > > > + .ops = &clk_regmap_divider_ops, > > > + .parent_hws = (const struct clk_hw *[]) { > > > + &s4_gp0_pll_dco.hw > > > + }, > > > + .num_parents = 1, > > > + .flags = CLK_SET_RATE_PARENT, > > > + }, > > > +}; > > > + > > > +/* > > > + * Internal hifi pll emulation configuration parameters > > > + */ > > > +static const struct reg_sequence s4_hifi_init_regs[] = { > > > + { .reg = ANACTRL_HIFIPLL_CTRL1, .def = 0x00010e56 }, > > > + { .reg = ANACTRL_HIFIPLL_CTRL2, .def = 0x00000000 }, > > > + { .reg = ANACTRL_HIFIPLL_CTRL3, .def = 0x6a285c00 }, > > > + { .reg = ANACTRL_HIFIPLL_CTRL4, .def = 0x65771290 }, > > > + { .reg = ANACTRL_HIFIPLL_CTRL5, .def = 0x39272000 }, > > > + { .reg = ANACTRL_HIFIPLL_CTRL6, .def = 0x56540000 } > > > +}; > > > > Please ensure that the initialization sequence values do not overlap > > with the below pll_data bits that are managed during runtime. > > [...] > > > > > > + > > > +static struct clk_regmap s4_hifi_pll_dco = { > > > + .data = &(struct meson_clk_pll_data){ > > > + .en = { > > > + .reg_off = ANACTRL_HIFIPLL_CTRL0, > > > + .shift = 28, > > > + .width = 1, > > > + }, > > > + .m = { > > > + .reg_off = ANACTRL_HIFIPLL_CTRL0, > > > + .shift = 0, > > > + .width = 8, > > > + }, > > > + .n = { > > > + .reg_off = ANACTRL_HIFIPLL_CTRL0, > > > + .shift = 10, > > > + .width = 5, > > > + }, > > > + .frac = { > > > + .reg_off = ANACTRL_HIFIPLL_CTRL1, > > > + .shift = 0, > > > + .width = 17, > > > + }, > > > + .l = { > > > + .reg_off = ANACTRL_HIFIPLL_CTRL0, > > > + .shift = 31, > > > + .width = 1, > > > + }, > > > + .rst = { > > > + .reg_off = ANACTRL_HIFIPLL_CTRL0, > > > + .shift = 29, > > > + .width = 1, > > > + }, > > > + .range = &s4_gp0_pll_mult_range, > > > + .init_regs = s4_hifi_init_regs, > > > + .init_count = ARRAY_SIZE(s4_hifi_init_regs), > > > + .flags = CLK_MESON_PLL_ROUND_CLOSEST, > > > + }, > > > + .hw.init = &(struct clk_init_data){ > > > + .name = "hifi_pll_dco", > > > + .ops = &meson_clk_pll_ops, > > > + .parent_data = (const struct clk_parent_data []) { > > > + { .fw_name = "xtal", } > > > + }, > > > + .num_parents = 1, > > > + }, > > > +}; > > > + > > > +static struct clk_regmap s4_hifi_pll = { > > > + .data = &(struct clk_regmap_div_data){ > > > + .offset = ANACTRL_HIFIPLL_CTRL0, > > > + .shift = 16, > > > + .width = 2, > > > + .flags = (CLK_DIVIDER_POWER_OF_TWO | > > > + CLK_DIVIDER_ROUND_CLOSEST), > > > + }, > > > + .hw.init = &(struct clk_init_data){ > > > + .name = "hifi_pll", > > > + .ops = &clk_regmap_divider_ops, > > > + .parent_hws = (const struct clk_hw *[]) { > > > + &s4_hifi_pll_dco.hw > > > + }, > > > + .num_parents = 1, > > > + .flags = CLK_SET_RATE_PARENT, > > > + }, > > > +}; > > > + > > > > [...] > > > > > +static int meson_s4_pll_probe(struct platform_device *pdev) > > > +{ > > > + struct device *dev = &pdev->dev; > > > + struct regmap *regmap; > > > + void __iomem *base; > > > + int ret, i; > > > + > > > + base = devm_platform_ioremap_resource(pdev, 0); > > > + if (IS_ERR(base)) > > > + return PTR_ERR(base); > > > + > > > + regmap = devm_regmap_init_mmio(dev, base, &clkc_regmap_config); > > > + if (IS_ERR(regmap)) > > > + return PTR_ERR(regmap); > > > + > > > + ret = regmap_multi_reg_write(regmap, s4_init_regs, ARRAY_SIZE(s4_init_regs)); > > > + if (ret) { > > > + dev_err(dev, "Failed to init registers\n"); > > > > dev_err_probe() > > Clock drivers are the foundation on which other drivers run. There is no > need to EPROBE_DEFER. Also use EPROBE_DEFER as long as it is better to use > when getting the resource. > At least you are requesting the ioremap resource, right? :-) And clock driver has tristate config, so can be built as module. > > > > > + return ret; > > > + } > > > + > > > + /* Populate regmap for the regmap backed clocks */ > > > + for (i = 0; i < ARRAY_SIZE(s4_pll_clk_regmaps); i++) > > > + s4_pll_clk_regmaps[i]->map = regmap; > > > + > > > + for (i = 0; i < s4_pll_hw_onecell_data.num; i++) { > > > + /* array might be sparse */ > > > + if (!s4_pll_hw_onecell_data.hws[i]) > > > + continue; > > > + > > > + ret = devm_clk_hw_register(dev, s4_pll_hw_onecell_data.hws[i]); > > > + if (ret) { > > > + dev_err(dev, "Clock registration failed\n"); > > > > dev_err_probe() > > [...] > > > > > > + return ret; > > > + } > > > + } > > > + > > > + return devm_of_clk_add_hw_provider(dev, of_clk_hw_onecell_get, > > > + &s4_pll_hw_onecell_data); > > > +} > > > + > > > +static const struct of_device_id clkc_match_table[] = { > > > + { > > > + .compatible = "amlogic,s4-pll-clkc", > > > + }, > > > + {} > > > +}; > > > + > > > +static struct platform_driver s4_driver = { > > > + .probe = meson_s4_pll_probe, > > > + .driver = { > > > + .name = "s4-pll-clkc", > > > + .of_match_table = clkc_match_table, > > > + }, > > > +}; > > > + > > > +module_platform_driver(s4_driver); > > > +MODULE_LICENSE("GPL"); > > > diff --git a/drivers/clk/meson/s4-pll.h b/drivers/clk/meson/s4-pll.h > > > new file mode 100644 > > > index 000000000000..1fb5bececf5f > > > --- /dev/null > > > +++ b/drivers/clk/meson/s4-pll.h > > > @@ -0,0 +1,87 @@ > > > +/* SPDX-License-Identifier: (GPL-2.0+ OR MIT) */ > > > +/* > > > + * Copyright (c) 2021 Amlogic, inc. > > > + * Author: Yu Tu > > > + */ > > > + > > > +#ifndef __MESON_S4_PLL_H__ > > > +#define __MESON_S4_PLL_H__ > > > + > > > +/* ANA_CTRL - Registers */ > > > + > > > +#define ANACTRL_FIXPLL_CTRL0 0x040 > > > +#define ANACTRL_FIXPLL_CTRL1 0x044 > > > +#define ANACTRL_FIXPLL_CTRL2 0x048 > > > +#define ANACTRL_FIXPLL_CTRL3 0x04c > > > +#define ANACTRL_FIXPLL_CTRL4 0x050 > > > +#define ANACTRL_FIXPLL_CTRL5 0x054 > > > +#define ANACTRL_FIXPLL_CTRL6 0x058 > > > +#define ANACTRL_FIXPLL_STS 0x05c > > > +#define ANACTRL_GP0PLL_CTRL0 0x080 > > > +#define ANACTRL_GP0PLL_CTRL1 0x084 > > > +#define ANACTRL_GP0PLL_CTRL2 0x088 > > > +#define ANACTRL_GP0PLL_CTRL3 0x08c > > > +#define ANACTRL_GP0PLL_CTRL4 0x090 > > > +#define ANACTRL_GP0PLL_CTRL5 0x094 > > > +#define ANACTRL_GP0PLL_CTRL6 0x098 > > > +#define ANACTRL_GP0PLL_STS 0x09c > > > +#define ANACTRL_HIFIPLL_CTRL0 0x100 > > > +#define ANACTRL_HIFIPLL_CTRL1 0x104 > > > +#define ANACTRL_HIFIPLL_CTRL2 0x108 > > > +#define ANACTRL_HIFIPLL_CTRL3 0x10c > > > +#define ANACTRL_HIFIPLL_CTRL4 0x110 > > > +#define ANACTRL_HIFIPLL_CTRL5 0x114 > > > +#define ANACTRL_HIFIPLL_CTRL6 0x118 > > > +#define ANACTRL_HIFIPLL_STS 0x11c > > > +#define ANACTRL_MPLL_CTRL0 0x180 > > > +#define ANACTRL_MPLL_CTRL1 0x184 > > > +#define ANACTRL_MPLL_CTRL2 0x188 > > > +#define ANACTRL_MPLL_CTRL3 0x18c > > > +#define ANACTRL_MPLL_CTRL4 0x190 > > > +#define ANACTRL_MPLL_CTRL5 0x194 > > > +#define ANACTRL_MPLL_CTRL6 0x198 > > > +#define ANACTRL_MPLL_CTRL7 0x19c > > > +#define ANACTRL_MPLL_CTRL8 0x1a0 > > > +#define ANACTRL_MPLL_STS 0x1a4 > > > +#define ANACTRL_HDMIPLL_CTRL0 0x1c0 > > > +#define ANACTRL_HDMIPLL_CTRL1 0x1c4 > > > +#define ANACTRL_HDMIPLL_CTRL2 0x1c8 > > > +#define ANACTRL_HDMIPLL_CTRL3 0x1cc > > > +#define ANACTRL_HDMIPLL_CTRL4 0x1d0 > > > +#define ANACTRL_HDMIPLL_CTRL5 0x1d4 > > > +#define ANACTRL_HDMIPLL_CTRL6 0x1d8 > > > +#define ANACTRL_HDMIPLL_STS 0x1dc > > > +#define ANACTRL_HDMIPLL_VLOCK 0x1e4 > > > + > > > +/* > > > + * CLKID index values > > > + * > > > + * These indices are entirely contrived and do not map onto the hardware. > > > + * It has now been decided to expose everything by default in the DT header: > > > + * include/dt-bindings/clock/axg-clkc.h. Only the clocks ids we don't want > > > > axg-clkc.h? > > I will correct. > > > > > > + * to expose, such as the internal muxes and dividers of composite clocks, > > > + * will remain defined here. > > > + */ > > > +#define CLKID_FIXED_PLL_DCO 0 > > > +#define CLKID_FCLK_DIV2_DIV 2 > > > +#define CLKID_FCLK_DIV3_DIV 4 > > > +#define CLKID_FCLK_DIV4_DIV 6 > > > +#define CLKID_FCLK_DIV5_DIV 8 > > > +#define CLKID_FCLK_DIV7_DIV 10 > > > +#define CLKID_FCLK_DIV2P5_DIV 12 > > > +#define CLKID_GP0_PLL_DCO 14 > > > +#define CLKID_HIFI_PLL_DCO 16 > > > +#define CLKID_HDMI_PLL_DCO 18 > > > +#define CLKID_HDMI_PLL_OD 19 > > > +#define CLKID_MPLL_50M_DIV 21 > > > +#define CLKID_MPLL_PREDIV 23 > > > +#define CLKID_MPLL0_DIV 24 > > > +#define CLKID_MPLL1_DIV 26 > > > +#define CLKID_MPLL2_DIV 28 > > > +#define CLKID_MPLL3_DIV 30 > > > + > > > +#define NR_PLL_CLKS 32 > > > +/* include the CLKIDs that have been made part of the DT binding */ > > > +#include > > > + > > > +#endif /* __MESON_S4_PLL_H__ */ > > > -- > > > 2.33.1 > > > > > > > > > _______________________________________________ > > > linux-amlogic mailing list > > > linux-amlogic@lists.infradead.org > > > http://lists.infradead.org/mailman/listinfo/linux-amlogic > > > > -- > > Thank you, > > Dmitry -- Thank you, Dmitry _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel