From patchwork Fri May 18 16:48:03 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Lechner X-Patchwork-Id: 10411493 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id B036B601F9 for ; Fri, 18 May 2018 16:57:26 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 9D1DE289BA for ; Fri, 18 May 2018 16:57:26 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 9143E28A00; Fri, 18 May 2018 16:57:26 +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=-7.8 required=2.0 tests=BAYES_00,DKIM_SIGNED, MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI, T_DKIM_INVALID autolearn=unavailable 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 145EB28A05 for ; Fri, 18 May 2018 16:57:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752553AbeERQuU (ORCPT ); Fri, 18 May 2018 12:50:20 -0400 Received: from vern.gendns.com ([206.190.152.46]:56743 "EHLO vern.gendns.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751221AbeERQuJ (ORCPT ); Fri, 18 May 2018 12:50:09 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lechnology.com; s=default; h=References:In-Reply-To:Message-Id:Date:Subject :Cc:To:From:Sender:Reply-To:MIME-Version:Content-Type: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=9cFYt+MWUCN0VkRKaDhYlphv5VC2Obv07Fopts3Uo2k=; b=kHnp6QZKZB1AAP6w7LrENwpPt DyNefZ2SHIcdG4Ce8wbo2Vau3gDzbPL6DvwBlbU0KlFx5DgdK0QGJH1R39vER6QgzfBWR7dkLhuN5 iwacEqiz+LdjiRcm3G+ynL5wxQQvpiSBHsrV8J9X7ywU0GZ3y0oqHa57ZYLT/YKsb74FmIDOL6d8k UnvJZBcOkaz03uqu5CNxFzFrPsaYkogHYFbKYQOTvdMXBZTuhgHzohmbMtiGgWrN7nZ4rGs96pCT+ gZ+C2vSFEKSuRcyWydiuJhvZ278i8PCmbcdnH0EzKSezVAfqOs4TqnowEOF33t2uKC+5w1zmzLLaS /ZwEZQjxQ==; Received: from 108-198-5-147.lightspeed.okcbok.sbcglobal.net ([108.198.5.147]:35704 helo=freyr.lechnology.com) by vern.gendns.com with esmtpsa (TLSv1.2:ECDHE-RSA-AES128-GCM-SHA256:128) (Exim 4.89_1) (envelope-from ) id 1fJiZz-00FrC3-BN; Fri, 18 May 2018 12:50:07 -0400 From: David Lechner To: linux-clk@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: David Lechner , Michael Turquette , Stephen Boyd , Rob Herring , Mark Rutland , Sekhar Nori , Kevin Hilman , Bartosz Golaszewski , Adam Ford , linux-kernel@vger.kernel.org Subject: [PATCH v11 01/27] clk: davinci: pll: allow dev == NULL Date: Fri, 18 May 2018 11:48:03 -0500 Message-Id: <20180518164829.27052-2-david@lechnology.com> X-Mailer: git-send-email 2.17.0 In-Reply-To: <20180518164829.27052-1-david@lechnology.com> References: <20180518164829.27052-1-david@lechnology.com> X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - vern.gendns.com X-AntiAbuse: Original Domain - vger.kernel.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - lechnology.com X-Get-Message-Sender-Via: vern.gendns.com: authenticated_id: davidmain+lechnology.com/only user confirmed/virtual account not confirmed X-Authenticated-Sender: vern.gendns.com: davidmain@lechnology.com X-Source: X-Source-Args: X-Source-Dir: 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 modifies the TI Davinci PLL clock driver to allow for the case when dev == NULL. On some (most) SoCs that use this driver, the PLL clock needs to be registered during early boot because it is used for clocksource/clkevent and there will be no platform device available. Some function declarations are moved to a public header files so that they can be called from mach init code. Also fix some missing @dev doc comments that would have been touched in this patch anyway. Signed-off-by: David Lechner Reviewed-by: Sekhar Nori --- v11 changes: - proper unwinding on errors - add #include to avoid W=1 warnings - fix more @dev in doc comments to avoid sparse warning v10 changes: - dropped helper functions that called devm_* versions of functions. - removed duplicate function declarations from pll.h v9 changes: - new patch in v9 drivers/clk/davinci/pll-da830.c | 5 +- drivers/clk/davinci/pll-da850.c | 22 +-- drivers/clk/davinci/pll-dm355.c | 9 +- drivers/clk/davinci/pll-dm365.c | 9 +- drivers/clk/davinci/pll-dm644x.c | 9 +- drivers/clk/davinci/pll-dm646x.c | 9 +- drivers/clk/davinci/pll.c | 275 +++++++++++++++++++++---------- drivers/clk/davinci/pll.h | 30 ++-- include/linux/clk/davinci.h | 24 +++ 9 files changed, 256 insertions(+), 136 deletions(-) create mode 100644 include/linux/clk/davinci.h diff --git a/drivers/clk/davinci/pll-da830.c b/drivers/clk/davinci/pll-da830.c index 929a3d3a9adb..0a0d06fb25fd 100644 --- a/drivers/clk/davinci/pll-da830.c +++ b/drivers/clk/davinci/pll-da830.c @@ -6,6 +6,7 @@ */ #include +#include #include #include #include @@ -36,11 +37,11 @@ SYSCLK(5, pll0_sysclk5, pll0_pllen, 5, 0); SYSCLK(6, pll0_sysclk6, pll0_pllen, 5, SYSCLK_FIXED_DIV); SYSCLK(7, pll0_sysclk7, pll0_pllen, 5, 0); -int da830_pll_init(struct device *dev, void __iomem *base) +int da830_pll_init(struct device *dev, void __iomem *base, struct regmap *cfgchip) { struct clk *clk; - davinci_pll_clk_register(dev, &da830_pll_info, "ref_clk", base); + davinci_pll_clk_register(dev, &da830_pll_info, "ref_clk", base, cfgchip); clk = davinci_pll_sysclk_register(dev, &pll0_sysclk2, base); clk_register_clkdev(clk, "pll0_sysclk2", "da830-psc0"); diff --git a/drivers/clk/davinci/pll-da850.c b/drivers/clk/davinci/pll-da850.c index 2a038b7908cc..59cc2e3733f9 100644 --- a/drivers/clk/davinci/pll-da850.c +++ b/drivers/clk/davinci/pll-da850.c @@ -7,7 +7,9 @@ #include #include +#include #include +#include #include #include #include @@ -81,11 +83,11 @@ static const struct davinci_pll_obsclk_info da850_pll0_obsclk_info = { .ocsrc_mask = GENMASK(4, 0), }; -int da850_pll0_init(struct device *dev, void __iomem *base) +int da850_pll0_init(struct device *dev, void __iomem *base, struct regmap *cfgchip) { struct clk *clk; - davinci_pll_clk_register(dev, &da850_pll0_info, "ref_clk", base); + davinci_pll_clk_register(dev, &da850_pll0_info, "ref_clk", base, cfgchip); clk = davinci_pll_sysclk_register(dev, &pll0_sysclk1, base); clk_register_clkdev(clk, "pll0_sysclk1", "da850-psc0"); @@ -134,11 +136,11 @@ static const struct davinci_pll_sysclk_info *da850_pll0_sysclk_info[] = { NULL }; -int of_da850_pll0_init(struct device *dev, void __iomem *base) +int of_da850_pll0_init(struct device *dev, void __iomem *base, struct regmap *cfgchip) { - return of_davinci_pll_init(dev, &da850_pll0_info, + return of_davinci_pll_init(dev, dev->of_node, &da850_pll0_info, &da850_pll0_obsclk_info, - da850_pll0_sysclk_info, 7, base); + da850_pll0_sysclk_info, 7, base, cfgchip); } static const struct davinci_pll_clk_info da850_pll1_info = { @@ -179,11 +181,11 @@ static const struct davinci_pll_obsclk_info da850_pll1_obsclk_info = { .ocsrc_mask = GENMASK(4, 0), }; -int da850_pll1_init(struct device *dev, void __iomem *base) +int da850_pll1_init(struct device *dev, void __iomem *base, struct regmap *cfgchip) { struct clk *clk; - davinci_pll_clk_register(dev, &da850_pll1_info, "oscin", base); + davinci_pll_clk_register(dev, &da850_pll1_info, "oscin", base, cfgchip); davinci_pll_sysclk_register(dev, &pll1_sysclk1, base); @@ -204,9 +206,9 @@ static const struct davinci_pll_sysclk_info *da850_pll1_sysclk_info[] = { NULL }; -int of_da850_pll1_init(struct device *dev, void __iomem *base) +int of_da850_pll1_init(struct device *dev, void __iomem *base, struct regmap *cfgchip) { - return of_davinci_pll_init(dev, &da850_pll1_info, + return of_davinci_pll_init(dev, dev->of_node, &da850_pll1_info, &da850_pll1_obsclk_info, - da850_pll1_sysclk_info, 3, base); + da850_pll1_sysclk_info, 3, base, cfgchip); } diff --git a/drivers/clk/davinci/pll-dm355.c b/drivers/clk/davinci/pll-dm355.c index 93f4a53d6b44..505aed80be9a 100644 --- a/drivers/clk/davinci/pll-dm355.c +++ b/drivers/clk/davinci/pll-dm355.c @@ -6,6 +6,7 @@ */ #include +#include #include #include #include @@ -27,11 +28,11 @@ SYSCLK(2, pll1_sysclk2, pll1_pllen, 5, SYSCLK_FIXED_DIV | SYSCLK_ALWAYS_ENABLED) SYSCLK(3, pll1_sysclk3, pll1_pllen, 5, SYSCLK_ALWAYS_ENABLED); SYSCLK(4, pll1_sysclk4, pll1_pllen, 5, SYSCLK_ALWAYS_ENABLED); -int dm355_pll1_init(struct device *dev, void __iomem *base) +int dm355_pll1_init(struct device *dev, void __iomem *base, struct regmap *cfgchip) { struct clk *clk; - davinci_pll_clk_register(dev, &dm355_pll1_info, "ref_clk", base); + davinci_pll_clk_register(dev, &dm355_pll1_info, "ref_clk", base, cfgchip); clk = davinci_pll_sysclk_register(dev, &pll1_sysclk1, base); clk_register_clkdev(clk, "pll1_sysclk1", "dm355-psc"); @@ -64,9 +65,9 @@ static const struct davinci_pll_clk_info dm355_pll2_info = { SYSCLK(1, pll2_sysclk1, pll2_pllen, 5, SYSCLK_FIXED_DIV | SYSCLK_ALWAYS_ENABLED); -int dm355_pll2_init(struct device *dev, void __iomem *base) +int dm355_pll2_init(struct device *dev, void __iomem *base, struct regmap *cfgchip) { - davinci_pll_clk_register(dev, &dm355_pll2_info, "oscin", base); + davinci_pll_clk_register(dev, &dm355_pll2_info, "oscin", base, cfgchip); davinci_pll_sysclk_register(dev, &pll2_sysclk1, base); diff --git a/drivers/clk/davinci/pll-dm365.c b/drivers/clk/davinci/pll-dm365.c index 5f8d9f42d0f3..2d29712753a3 100644 --- a/drivers/clk/davinci/pll-dm365.c +++ b/drivers/clk/davinci/pll-dm365.c @@ -7,6 +7,7 @@ #include #include +#include #include #include #include @@ -56,11 +57,11 @@ static const struct davinci_pll_obsclk_info dm365_pll1_obsclk_info = { .ocsrc_mask = BIT(4), }; -int dm365_pll1_init(struct device *dev, void __iomem *base) +int dm365_pll1_init(struct device *dev, void __iomem *base, struct regmap *cfgchip) { struct clk *clk; - davinci_pll_clk_register(dev, &dm365_pll1_info, "ref_clk", base); + davinci_pll_clk_register(dev, &dm365_pll1_info, "ref_clk", base, cfgchip); clk = davinci_pll_sysclk_register(dev, &pll1_sysclk1, base); clk_register_clkdev(clk, "pll1_sysclk1", "dm365-psc"); @@ -119,11 +120,11 @@ static const struct davinci_pll_obsclk_info dm365_pll2_obsclk_info = { .ocsrc_mask = BIT(4), }; -int dm365_pll2_init(struct device *dev, void __iomem *base) +int dm365_pll2_init(struct device *dev, void __iomem *base, struct regmap *cfgchip) { struct clk *clk; - davinci_pll_clk_register(dev, &dm365_pll2_info, "oscin", base); + davinci_pll_clk_register(dev, &dm365_pll2_info, "oscin", base, cfgchip); davinci_pll_sysclk_register(dev, &pll2_sysclk1, base); diff --git a/drivers/clk/davinci/pll-dm644x.c b/drivers/clk/davinci/pll-dm644x.c index 69bf785377cf..7650fadfaac8 100644 --- a/drivers/clk/davinci/pll-dm644x.c +++ b/drivers/clk/davinci/pll-dm644x.c @@ -6,6 +6,7 @@ */ #include +#include #include #include #include @@ -27,11 +28,11 @@ SYSCLK(2, pll1_sysclk2, pll1_pllen, 4, SYSCLK_FIXED_DIV); SYSCLK(3, pll1_sysclk3, pll1_pllen, 4, SYSCLK_FIXED_DIV); SYSCLK(5, pll1_sysclk5, pll1_pllen, 4, SYSCLK_FIXED_DIV); -int dm644x_pll1_init(struct device *dev, void __iomem *base) +int dm644x_pll1_init(struct device *dev, void __iomem *base, struct regmap *cfgchip) { struct clk *clk; - davinci_pll_clk_register(dev, &dm644x_pll1_info, "ref_clk", base); + davinci_pll_clk_register(dev, &dm644x_pll1_info, "ref_clk", base, cfgchip); clk = davinci_pll_sysclk_register(dev, &pll1_sysclk1, base); clk_register_clkdev(clk, "pll1_sysclk1", "dm644x-psc"); @@ -66,9 +67,9 @@ static const struct davinci_pll_clk_info dm644x_pll2_info = { SYSCLK(1, pll2_sysclk1, pll2_pllen, 4, 0); SYSCLK(2, pll2_sysclk2, pll2_pllen, 4, 0); -int dm644x_pll2_init(struct device *dev, void __iomem *base) +int dm644x_pll2_init(struct device *dev, void __iomem *base, struct regmap *cfgchip) { - davinci_pll_clk_register(dev, &dm644x_pll2_info, "oscin", base); + davinci_pll_clk_register(dev, &dm644x_pll2_info, "oscin", base, cfgchip); davinci_pll_sysclk_register(dev, &pll2_sysclk1, base); diff --git a/drivers/clk/davinci/pll-dm646x.c b/drivers/clk/davinci/pll-dm646x.c index 0ae827e3ce80..26982970df0e 100644 --- a/drivers/clk/davinci/pll-dm646x.c +++ b/drivers/clk/davinci/pll-dm646x.c @@ -6,6 +6,7 @@ */ #include +#include #include #include #include @@ -29,11 +30,11 @@ SYSCLK(6, pll1_sysclk6, pll1_pllen, 4, 0); SYSCLK(8, pll1_sysclk8, pll1_pllen, 4, 0); SYSCLK(9, pll1_sysclk9, pll1_pllen, 4, 0); -int dm646x_pll1_init(struct device *dev, void __iomem *base) +int dm646x_pll1_init(struct device *dev, void __iomem *base, struct regmap *cfgchip) { struct clk *clk; - davinci_pll_clk_register(dev, &dm646x_pll1_info, "ref_clk", base); + davinci_pll_clk_register(dev, &dm646x_pll1_info, "ref_clk", base, cfgchip); clk = davinci_pll_sysclk_register(dev, &pll1_sysclk1, base); clk_register_clkdev(clk, "pll1_sysclk1", "dm646x-psc"); @@ -74,9 +75,9 @@ static const struct davinci_pll_clk_info dm646x_pll2_info = { SYSCLK(1, pll2_sysclk1, pll2_pllen, 4, SYSCLK_ALWAYS_ENABLED); -int dm646x_pll2_init(struct device *dev, void __iomem *base) +int dm646x_pll2_init(struct device *dev, void __iomem *base, struct regmap *cfgchip) { - davinci_pll_clk_register(dev, &dm646x_pll2_info, "oscin", base); + davinci_pll_clk_register(dev, &dm646x_pll2_info, "oscin", base, cfgchip); davinci_pll_sysclk_register(dev, &pll2_sysclk1, base); diff --git a/drivers/clk/davinci/pll.c b/drivers/clk/davinci/pll.c index 23a24c944f1d..ae5f966b503f 100644 --- a/drivers/clk/davinci/pll.c +++ b/drivers/clk/davinci/pll.c @@ -11,6 +11,7 @@ #include #include +#include #include #include #include @@ -223,6 +224,7 @@ static const struct clk_ops dm365_pll_ops = { /** * davinci_pll_div_register - common *DIV clock implementation + * @dev: The PLL platform device or NULL * @name: the clock name * @parent_name: the parent clock name * @reg: the *DIV register @@ -240,17 +242,21 @@ static struct clk *davinci_pll_div_register(struct device *dev, const struct clk_ops *divider_ops = &clk_divider_ops; struct clk_gate *gate; struct clk_divider *divider; + struct clk *clk; + int ret; - gate = devm_kzalloc(dev, sizeof(*gate), GFP_KERNEL); + gate = kzalloc(sizeof(*gate), GFP_KERNEL); if (!gate) return ERR_PTR(-ENOMEM); gate->reg = reg; gate->bit_idx = DIV_ENABLE_SHIFT; - divider = devm_kzalloc(dev, sizeof(*divider), GFP_KERNEL); - if (!divider) - return ERR_PTR(-ENOMEM); + divider = kzalloc(sizeof(*divider), GFP_KERNEL); + if (!divider) { + ret = -ENOMEM; + goto err_free_gate; + } divider->reg = reg; divider->shift = DIV_RATIO_SHIFT; @@ -261,9 +267,22 @@ static struct clk *davinci_pll_div_register(struct device *dev, divider_ops = &clk_divider_ro_ops; } - return clk_register_composite(dev, name, parent_names, num_parents, - NULL, NULL, ÷r->hw, divider_ops, - &gate->hw, &clk_gate_ops, flags); + clk = clk_register_composite(dev, name, parent_names, num_parents, + NULL, NULL, ÷r->hw, divider_ops, + &gate->hw, &clk_gate_ops, flags); + if (IS_ERR(clk)) { + ret = PTR_ERR(clk); + goto err_free_divider; + } + + return clk; + +err_free_divider: + kfree(divider); +err_free_gate: + kfree(gate); + + return ERR_PTR(ret); } struct davinci_pllen_clk { @@ -321,36 +340,17 @@ static int davinci_pllen_rate_change(struct notifier_block *nb, return NOTIFY_OK; } -static struct davinci_pll_platform_data *davinci_pll_get_pdata(struct device *dev) -{ - struct davinci_pll_platform_data *pdata = dev_get_platdata(dev); - - /* - * Platform data is optional, so allocate a new struct if one was not - * provided. For device tree, this will always be the case. - */ - if (!pdata) - pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); - if (!pdata) - return NULL; - - /* for device tree, we need to fill in the struct */ - if (dev->of_node) - pdata->cfgchip = - syscon_regmap_lookup_by_compatible("ti,da830-cfgchip"); - - return pdata; -} - static struct notifier_block davinci_pllen_notifier = { .notifier_call = davinci_pllen_rate_change, }; /** * davinci_pll_clk_register - Register a PLL clock + * @dev: The PLL platform device or NULL * @info: The device-specific clock info * @parent_name: The parent clock name * @base: The PLL's memory region + * @cfgchip: CFGCHIP syscon regmap for info->unlock_reg or NULL * * This creates a series of clocks that represent the PLL. * @@ -366,9 +366,9 @@ static struct notifier_block davinci_pllen_notifier = { struct clk *davinci_pll_clk_register(struct device *dev, const struct davinci_pll_clk_info *info, const char *parent_name, - void __iomem *base) + void __iomem *base, + struct regmap *cfgchip) { - struct davinci_pll_platform_data *pdata; char prediv_name[MAX_NAME_SIZE]; char pllout_name[MAX_NAME_SIZE]; char postdiv_name[MAX_NAME_SIZE]; @@ -376,11 +376,12 @@ struct clk *davinci_pll_clk_register(struct device *dev, struct clk_init_data init; struct davinci_pll_clk *pllout; struct davinci_pllen_clk *pllen; - struct clk *pllout_clk, *clk; - - pdata = davinci_pll_get_pdata(dev); - if (!pdata) - return ERR_PTR(-ENOMEM); + struct clk *oscin_clk = NULL; + struct clk *prediv_clk = NULL; + struct clk *pllout_clk; + struct clk *postdiv_clk = NULL; + struct clk *pllen_clk; + int ret; if (info->flags & PLL_HAS_CLKMODE) { /* @@ -392,10 +393,10 @@ struct clk *davinci_pll_clk_register(struct device *dev, * a number of different things. In this driver we use it to * mean the signal after the PLLCTL[CLKMODE] switch. */ - clk = clk_register_fixed_factor(dev, OSCIN_CLK_NAME, - parent_name, 0, 1, 1); - if (IS_ERR(clk)) - return clk; + oscin_clk = clk_register_fixed_factor(dev, OSCIN_CLK_NAME, + parent_name, 0, 1, 1); + if (IS_ERR(oscin_clk)) + return oscin_clk; parent_name = OSCIN_CLK_NAME; } @@ -411,30 +412,34 @@ struct clk *davinci_pll_clk_register(struct device *dev, /* Some? DM355 chips don't correctly report the PREDIV value */ if (info->flags & PLL_PREDIV_FIXED8) - clk = clk_register_fixed_factor(dev, prediv_name, - parent_name, flags, 1, 8); + prediv_clk = clk_register_fixed_factor(dev, prediv_name, + parent_name, flags, 1, 8); else - clk = davinci_pll_div_register(dev, prediv_name, + prediv_clk = davinci_pll_div_register(dev, prediv_name, parent_name, base + PREDIV, fixed, flags); - if (IS_ERR(clk)) - return clk; + if (IS_ERR(prediv_clk)) { + ret = PTR_ERR(prediv_clk); + goto err_unregister_oscin; + } parent_name = prediv_name; } /* Unlock writing to PLL registers */ if (info->unlock_reg) { - if (IS_ERR_OR_NULL(pdata->cfgchip)) + if (IS_ERR_OR_NULL(cfgchip)) dev_warn(dev, "Failed to get CFGCHIP (%ld)\n", - PTR_ERR(pdata->cfgchip)); + PTR_ERR(cfgchip)); else - regmap_write_bits(pdata->cfgchip, info->unlock_reg, + regmap_write_bits(cfgchip, info->unlock_reg, info->unlock_mask, 0); } - pllout = devm_kzalloc(dev, sizeof(*pllout), GFP_KERNEL); - if (!pllout) - return ERR_PTR(-ENOMEM); + pllout = kzalloc(sizeof(*pllout), GFP_KERNEL); + if (!pllout) { + ret = -ENOMEM; + goto err_unregister_prediv; + } snprintf(pllout_name, MAX_NAME_SIZE, "%s_pllout", info->name); @@ -456,9 +461,11 @@ struct clk *davinci_pll_clk_register(struct device *dev, pllout->pllm_min = info->pllm_min; pllout->pllm_max = info->pllm_max; - pllout_clk = devm_clk_register(dev, &pllout->hw); - if (IS_ERR(pllout_clk)) - return pllout_clk; + pllout_clk = clk_register(dev, &pllout->hw); + if (IS_ERR(pllout_clk)) { + ret = PTR_ERR(pllout_clk); + goto err_free_pllout; + } clk_hw_set_rate_range(&pllout->hw, info->pllout_min_rate, info->pllout_max_rate); @@ -474,17 +481,21 @@ struct clk *davinci_pll_clk_register(struct device *dev, if (info->flags & PLL_POSTDIV_ALWAYS_ENABLED) flags |= CLK_IS_CRITICAL; - clk = davinci_pll_div_register(dev, postdiv_name, parent_name, - base + POSTDIV, fixed, flags); - if (IS_ERR(clk)) - return clk; + postdiv_clk = davinci_pll_div_register(dev, postdiv_name, + parent_name, base + POSTDIV, fixed, flags); + if (IS_ERR(postdiv_clk)) { + ret = PTR_ERR(postdiv_clk); + goto err_unregister_pllout; + } parent_name = postdiv_name; } - pllen = devm_kzalloc(dev, sizeof(*pllout), GFP_KERNEL); - if (!pllen) - return ERR_PTR(-ENOMEM); + pllen = kzalloc(sizeof(*pllout), GFP_KERNEL); + if (!pllen) { + ret = -ENOMEM; + goto err_unregister_postdiv; + } snprintf(pllen_name, MAX_NAME_SIZE, "%s_pllen", info->name); @@ -497,17 +508,35 @@ struct clk *davinci_pll_clk_register(struct device *dev, pllen->hw.init = &init; pllen->base = base; - clk = devm_clk_register(dev, &pllen->hw); - if (IS_ERR(clk)) - return clk; + pllen_clk = clk_register(dev, &pllen->hw); + if (IS_ERR(pllen_clk)) { + ret = PTR_ERR(pllen_clk); + goto err_free_pllen; + } - clk_notifier_register(clk, &davinci_pllen_notifier); + clk_notifier_register(pllen_clk, &davinci_pllen_notifier); return pllout_clk; + +err_free_pllen: + kfree(pllen); +err_unregister_postdiv: + clk_unregister(postdiv_clk); +err_unregister_pllout: + clk_unregister(pllout_clk); +err_free_pllout: + kfree(pllout); +err_unregister_prediv: + clk_unregister(prediv_clk); +err_unregister_oscin: + clk_unregister(oscin_clk); + + return ERR_PTR(ret); } /** * davinci_pll_auxclk_register - Register bypass clock (AUXCLK) + * @dev: The PLL platform device or NULL * @name: The clock name * @base: The PLL memory region */ @@ -521,6 +550,7 @@ struct clk *davinci_pll_auxclk_register(struct device *dev, /** * davinci_pll_sysclkbp_clk_register - Register bypass divider clock (SYSCLKBP) + * @dev: The PLL platform device or NULL * @name: The clock name * @base: The PLL memory region */ @@ -535,6 +565,7 @@ struct clk *davinci_pll_sysclkbp_clk_register(struct device *dev, /** * davinci_pll_obsclk_register - Register oscillator divider clock (OBSCLK) + * @dev: The PLL platform device or NULL * @info: The clock info * @base: The PLL memory region */ @@ -546,9 +577,11 @@ davinci_pll_obsclk_register(struct device *dev, struct clk_mux *mux; struct clk_gate *gate; struct clk_divider *divider; + struct clk *clk; u32 oscdiv; + int ret; - mux = devm_kzalloc(dev, sizeof(*mux), GFP_KERNEL); + mux = kzalloc(sizeof(*mux), GFP_KERNEL); if (!mux) return ERR_PTR(-ENOMEM); @@ -556,16 +589,20 @@ davinci_pll_obsclk_register(struct device *dev, mux->table = info->table; mux->mask = info->ocsrc_mask; - gate = devm_kzalloc(dev, sizeof(*gate), GFP_KERNEL); - if (!gate) - return ERR_PTR(-ENOMEM); + gate = kzalloc(sizeof(*gate), GFP_KERNEL); + if (!gate) { + ret = -ENOMEM; + goto err_free_mux; + } gate->reg = base + CKEN; gate->bit_idx = CKEN_OBSCLK_SHIFT; - divider = devm_kzalloc(dev, sizeof(*divider), GFP_KERNEL); - if (!divider) - return ERR_PTR(-ENOMEM); + divider = kzalloc(sizeof(*divider), GFP_KERNEL); + if (!divider) { + ret = -ENOMEM; + goto err_free_gate; + } divider->reg = base + OSCDIV; divider->shift = DIV_RATIO_SHIFT; @@ -576,11 +613,27 @@ davinci_pll_obsclk_register(struct device *dev, oscdiv |= BIT(DIV_ENABLE_SHIFT); writel(oscdiv, base + OSCDIV); - return clk_register_composite(dev, info->name, info->parent_names, - info->num_parents, - &mux->hw, &clk_mux_ops, - ÷r->hw, &clk_divider_ops, - &gate->hw, &clk_gate_ops, 0); + clk = clk_register_composite(dev, info->name, info->parent_names, + info->num_parents, + &mux->hw, &clk_mux_ops, + ÷r->hw, &clk_divider_ops, + &gate->hw, &clk_gate_ops, 0); + + if (IS_ERR(clk)) { + ret = PTR_ERR(clk); + goto err_free_divider; + } + + return clk; + +err_free_divider: + kfree(divider); +err_free_gate: + kfree(gate); +err_free_mux: + kfree(mux); + + return ERR_PTR(ret); } /* The PLL SYSCLKn clocks have a mechanism for synchronizing rate changes. */ @@ -616,6 +669,7 @@ static struct notifier_block davinci_pll_sysclk_notifier = { /** * davinci_pll_sysclk_register - Register divider clocks (SYSCLKn) + * @dev: The PLL platform device or NULL * @info: The clock info * @base: The PLL memory region */ @@ -630,6 +684,7 @@ davinci_pll_sysclk_register(struct device *dev, struct clk *clk; u32 reg; u32 flags = 0; + int ret; /* PLLDIVn registers are not entirely consecutive */ if (info->id < 4) @@ -637,16 +692,18 @@ davinci_pll_sysclk_register(struct device *dev, else reg = PLLDIV4 + 4 * (info->id - 4); - gate = devm_kzalloc(dev, sizeof(*gate), GFP_KERNEL); + gate = kzalloc(sizeof(*gate), GFP_KERNEL); if (!gate) return ERR_PTR(-ENOMEM); gate->reg = base + reg; gate->bit_idx = DIV_ENABLE_SHIFT; - divider = devm_kzalloc(dev, sizeof(*divider), GFP_KERNEL); - if (!divider) - return ERR_PTR(-ENOMEM); + divider = kzalloc(sizeof(*divider), GFP_KERNEL); + if (!divider) { + ret = -ENOMEM; + goto err_free_gate; + } divider->reg = base + reg; divider->shift = DIV_RATIO_SHIFT; @@ -668,22 +725,31 @@ davinci_pll_sysclk_register(struct device *dev, clk = clk_register_composite(dev, info->name, &info->parent_name, 1, NULL, NULL, ÷r->hw, divider_ops, &gate->hw, &clk_gate_ops, flags); - if (IS_ERR(clk)) - return clk; + if (IS_ERR(clk)) { + ret = PTR_ERR(clk); + goto err_free_divider; + } clk_notifier_register(clk, &davinci_pll_sysclk_notifier); return clk; + +err_free_divider: + kfree(divider); +err_free_gate: + kfree(gate); + + return ERR_PTR(ret); } -int of_davinci_pll_init(struct device *dev, +int of_davinci_pll_init(struct device *dev, struct device_node *node, const struct davinci_pll_clk_info *info, const struct davinci_pll_obsclk_info *obsclk_info, const struct davinci_pll_sysclk_info **div_info, u8 max_sysclk_id, - void __iomem *base) + void __iomem *base, + struct regmap *cfgchip) { - struct device_node *node = dev->of_node; struct device_node *child; const char *parent_name; struct clk *clk; @@ -693,7 +759,7 @@ int of_davinci_pll_init(struct device *dev, else parent_name = OSCIN_CLK_NAME; - clk = davinci_pll_clk_register(dev, info, parent_name, base); + clk = davinci_pll_clk_register(dev, info, parent_name, base, cfgchip); if (IS_ERR(clk)) { dev_err(dev, "failed to register %s\n", info->name); return PTR_ERR(clk); @@ -711,11 +777,11 @@ int of_davinci_pll_init(struct device *dev, int n_clks = max_sysclk_id + 1; int i; - clk_data = devm_kzalloc(dev, sizeof(*clk_data), GFP_KERNEL); + clk_data = kzalloc(sizeof(*clk_data), GFP_KERNEL); if (!clk_data) return -ENOMEM; - clks = devm_kmalloc_array(dev, n_clks, sizeof(*clks), GFP_KERNEL); + clks = kmalloc_array(n_clks, sizeof(*clks), GFP_KERNEL); if (!clks) return -ENOMEM; @@ -770,6 +836,27 @@ int of_davinci_pll_init(struct device *dev, return 0; } +static struct davinci_pll_platform_data *davinci_pll_get_pdata(struct device *dev) +{ + struct davinci_pll_platform_data *pdata = dev_get_platdata(dev); + + /* + * Platform data is optional, so allocate a new struct if one was not + * provided. For device tree, this will always be the case. + */ + if (!pdata) + pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); + if (!pdata) + return NULL; + + /* for device tree, we need to fill in the struct */ + if (dev->of_node) + pdata->cfgchip = + syscon_regmap_lookup_by_compatible("ti,da830-cfgchip"); + + return pdata; +} + static const struct of_device_id davinci_pll_of_match[] = { { .compatible = "ti,da850-pll0", .data = of_da850_pll0_init }, { .compatible = "ti,da850-pll1", .data = of_da850_pll1_init }, @@ -791,11 +878,13 @@ static const struct platform_device_id davinci_pll_id_table[] = { { } }; -typedef int (*davinci_pll_init)(struct device *dev, void __iomem *base); +typedef int (*davinci_pll_init)(struct device *dev, void __iomem *base, + struct regmap *cfgchip); static int davinci_pll_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; + struct davinci_pll_platform_data *pdata; const struct of_device_id *of_id; davinci_pll_init pll_init = NULL; struct resource *res; @@ -812,12 +901,18 @@ static int davinci_pll_probe(struct platform_device *pdev) return -EINVAL; } + pdata = davinci_pll_get_pdata(dev); + if (!pdata) { + dev_err(dev, "missing platform data\n"); + return -EINVAL; + } + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); base = devm_ioremap_resource(dev, res); if (IS_ERR(base)) return PTR_ERR(base); - return pll_init(dev, base); + return pll_init(dev, base, pdata->cfgchip); } static struct platform_driver davinci_pll_driver = { diff --git a/drivers/clk/davinci/pll.h b/drivers/clk/davinci/pll.h index b1b6fb23f972..562652fc0759 100644 --- a/drivers/clk/davinci/pll.h +++ b/drivers/clk/davinci/pll.h @@ -11,6 +11,7 @@ #include #include #include +#include #include #define PLL_HAS_CLKMODE BIT(0) /* PLL has PLLCTL[CLKMODE] */ @@ -94,7 +95,8 @@ struct davinci_pll_obsclk_info { struct clk *davinci_pll_clk_register(struct device *dev, const struct davinci_pll_clk_info *info, const char *parent_name, - void __iomem *base); + void __iomem *base, + struct regmap *cfgchip); struct clk *davinci_pll_auxclk_register(struct device *dev, const char *name, void __iomem *base); @@ -110,32 +112,24 @@ davinci_pll_sysclk_register(struct device *dev, const struct davinci_pll_sysclk_info *info, void __iomem *base); -int of_davinci_pll_init(struct device *dev, +int of_davinci_pll_init(struct device *dev, struct device_node *node, const struct davinci_pll_clk_info *info, const struct davinci_pll_obsclk_info *obsclk_info, const struct davinci_pll_sysclk_info **div_info, u8 max_sysclk_id, - void __iomem *base); + void __iomem *base, + struct regmap *cfgchip); /* Platform-specific callbacks */ -int da830_pll_init(struct device *dev, void __iomem *base); +int da850_pll1_init(struct device *dev, void __iomem *base, struct regmap *cfgchip); +int of_da850_pll0_init(struct device *dev, void __iomem *base, struct regmap *cfgchip); +int of_da850_pll1_init(struct device *dev, void __iomem *base, struct regmap *cfgchip); -int da850_pll0_init(struct device *dev, void __iomem *base); -int da850_pll1_init(struct device *dev, void __iomem *base); -int of_da850_pll0_init(struct device *dev, void __iomem *base); -int of_da850_pll1_init(struct device *dev, void __iomem *base); +int dm355_pll2_init(struct device *dev, void __iomem *base, struct regmap *cfgchip); -int dm355_pll1_init(struct device *dev, void __iomem *base); -int dm355_pll2_init(struct device *dev, void __iomem *base); +int dm644x_pll2_init(struct device *dev, void __iomem *base, struct regmap *cfgchip); -int dm365_pll1_init(struct device *dev, void __iomem *base); -int dm365_pll2_init(struct device *dev, void __iomem *base); - -int dm644x_pll1_init(struct device *dev, void __iomem *base); -int dm644x_pll2_init(struct device *dev, void __iomem *base); - -int dm646x_pll1_init(struct device *dev, void __iomem *base); -int dm646x_pll2_init(struct device *dev, void __iomem *base); +int dm646x_pll2_init(struct device *dev, void __iomem *base, struct regmap *cfgchip); #endif /* __CLK_DAVINCI_PLL_H___ */ diff --git a/include/linux/clk/davinci.h b/include/linux/clk/davinci.h new file mode 100644 index 000000000000..ebdd9df1c0ef --- /dev/null +++ b/include/linux/clk/davinci.h @@ -0,0 +1,24 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Clock drivers for TI DaVinci PLL and PSC controllers + * + * Copyright (C) 2018 David Lechner + */ + +#ifndef __LINUX_CLK_DAVINCI_PLL_H___ +#define __LINUX_CLK_DAVINCI_PLL_H___ + +#include +#include + +/* function for registering clocks in early boot */ + +int da830_pll_init(struct device *dev, void __iomem *base, struct regmap *cfgchip); +int da850_pll0_init(struct device *dev, void __iomem *base, struct regmap *cfgchip); +int dm355_pll1_init(struct device *dev, void __iomem *base, struct regmap *cfgchip); +int dm365_pll1_init(struct device *dev, void __iomem *base, struct regmap *cfgchip); +int dm365_pll2_init(struct device *dev, void __iomem *base, struct regmap *cfgchip); +int dm644x_pll1_init(struct device *dev, void __iomem *base, struct regmap *cfgchip); +int dm646x_pll1_init(struct device *dev, void __iomem *base, struct regmap *cfgchip); + +#endif /* __LINUX_CLK_DAVINCI_PLL_H___ */