From patchwork Fri Feb 24 13:19:29 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter De Schrijver X-Patchwork-Id: 9590351 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 DA20460578 for ; Fri, 24 Feb 2017 13:21:49 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id B1F252874F for ; Fri, 24 Feb 2017 13:21:49 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id A69AE2876B; Fri, 24 Feb 2017 13:21:49 +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=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham 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 0C2962875B for ; Fri, 24 Feb 2017 13:21:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751836AbdBXNVp (ORCPT ); Fri, 24 Feb 2017 08:21:45 -0500 Received: from hqemgate16.nvidia.com ([216.228.121.65]:19142 "EHLO hqemgate16.nvidia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751618AbdBXNVM (ORCPT ); Fri, 24 Feb 2017 08:21:12 -0500 Received: from hqpgpgate101.nvidia.com (Not Verified[216.228.121.13]) by hqemgate16.nvidia.com id ; Fri, 24 Feb 2017 05:21:03 -0800 Received: from HQMAIL108.nvidia.com ([172.20.13.39]) by hqpgpgate101.nvidia.com (PGP Universal service); Fri, 24 Feb 2017 05:21:01 -0800 X-PGP-Universal: processed; by hqpgpgate101.nvidia.com on Fri, 24 Feb 2017 05:21:01 -0800 Received: from UKMAIL101.nvidia.com (10.26.138.13) by HQMAIL108.nvidia.com (172.18.146.13) with Microsoft SMTP Server (TLS) id 15.0.1263.5; Fri, 24 Feb 2017 13:21:00 +0000 Received: from tbergstrom-lnx.Nvidia.com (10.21.24.170) by UKMAIL101.nvidia.com (10.26.138.13) with Microsoft SMTP Server (TLS) id 15.0.1263.5; Fri, 24 Feb 2017 13:20:56 +0000 Received: from tbergstrom-lnx.nvidia.com (localhost [127.0.0.1]) by tbergstrom-lnx.Nvidia.com (Postfix) with ESMTP id 8F826F8005C; Fri, 24 Feb 2017 15:20:56 +0200 (EET) From: Peter De Schrijver To: Peter De Schrijver , Prashant Gaikwad , Michael Turquette , "Stephen Boyd" , Stephen Warren , "Thierry Reding" , Alexandre Courbot , "Rob Herring" , Mark Rutland , "Rhyland Klein" , , , , Subject: [PATCH v2 4/5] clk: tegra: add super clk mux/div Date: Fri, 24 Feb 2017 15:19:29 +0200 Message-ID: <1487942376-19631-5-git-send-email-pdeschrijver@nvidia.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1487942376-19631-1-git-send-email-pdeschrijver@nvidia.com> References: <1487942376-19631-1-git-send-email-pdeschrijver@nvidia.com> X-NVConfidentiality: public MIME-Version: 1.0 X-Originating-IP: [10.21.24.170] X-ClientProxiedBy: UKMAIL101.nvidia.com (10.26.138.13) To UKMAIL101.nvidia.com (10.26.138.13) 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 Add a super clock type which implements both mux and divider. This is used for aclk. Signed-off-by: Peter De Schrijver --- drivers/clk/tegra/clk-super.c | 87 +++++++++++++++++++++++++++++++++++++++++-- drivers/clk/tegra/clk.h | 7 +++- 2 files changed, 89 insertions(+), 5 deletions(-) diff --git a/drivers/clk/tegra/clk-super.c b/drivers/clk/tegra/clk-super.c index 131d1b50..7982d41 100644 --- a/drivers/clk/tegra/clk-super.c +++ b/drivers/clk/tegra/clk-super.c @@ -121,9 +121,50 @@ static int clk_super_set_parent(struct clk_hw *hw, u8 index) return err; } +const struct clk_ops tegra_clk_super_mux_ops = { + .get_parent = clk_super_get_parent, + .set_parent = clk_super_set_parent, +}; + +static long clk_super_round_rate(struct clk_hw *hw, unsigned long rate, + unsigned long *parent_rate) +{ + struct tegra_clk_super_mux *super = to_clk_super_mux(hw); + struct clk_hw *div_hw = &super->frac_div.hw; + + __clk_hw_set_clk(div_hw, hw); + + return super->div_ops->round_rate(div_hw, rate, parent_rate); +} + +static unsigned long clk_super_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + struct tegra_clk_super_mux *super = to_clk_super_mux(hw); + struct clk_hw *div_hw = &super->frac_div.hw; + + __clk_hw_set_clk(div_hw, hw); + + return super->div_ops->recalc_rate(div_hw, parent_rate); +} + +static int clk_super_set_rate(struct clk_hw *hw, unsigned long rate, + unsigned long parent_rate) +{ + struct tegra_clk_super_mux *super = to_clk_super_mux(hw); + struct clk_hw *div_hw = &super->frac_div.hw; + + __clk_hw_set_clk(div_hw, hw); + + return super->div_ops->set_rate(div_hw, rate, parent_rate); +} + const struct clk_ops tegra_clk_super_ops = { .get_parent = clk_super_get_parent, .set_parent = clk_super_set_parent, + .set_rate = clk_super_set_rate, + .round_rate = clk_super_round_rate, + .recalc_rate = clk_super_recalc_rate, }; struct clk *tegra_clk_register_super_mux(const char *name, @@ -136,13 +177,11 @@ struct clk *tegra_clk_register_super_mux(const char *name, struct clk_init_data init; super = kzalloc(sizeof(*super), GFP_KERNEL); - if (!super) { - pr_err("%s: could not allocate super clk\n", __func__); + if (!super) return ERR_PTR(-ENOMEM); - } init.name = name; - init.ops = &tegra_clk_super_ops; + init.ops = &tegra_clk_super_mux_ops; init.flags = flags; init.parent_names = parent_names; init.num_parents = num_parents; @@ -163,3 +202,43 @@ struct clk *tegra_clk_register_super_mux(const char *name, return clk; } + +struct clk *tegra_clk_register_super_clk(const char *name, + const char **parent_names, u8 num_parents, + unsigned long flags, void __iomem *reg, u8 clk_super_flags, + spinlock_t *lock) +{ + struct tegra_clk_super_mux *super; + struct clk *clk; + struct clk_init_data init; + + super = kzalloc(sizeof(*super), GFP_KERNEL); + if (!super) + return ERR_PTR(-ENOMEM); + + init.name = name; + init.ops = &tegra_clk_super_ops; + init.flags = flags; + init.parent_names = parent_names; + init.num_parents = num_parents; + + super->reg = reg; + super->lock = lock; + super->width = 4; + super->flags = clk_super_flags; + super->frac_div.reg = reg + 4; + super->frac_div.shift = 16; + super->frac_div.width = 8; + super->frac_div.frac_width = 1; + super->frac_div.lock = lock; + super->div_ops = &tegra_clk_frac_div_ops; + + /* Data in .init is copied by clk_register(), so stack variable OK */ + super->hw.init = &init; + + clk = clk_register(NULL, &super->hw); + if (IS_ERR(clk)) + kfree(super); + + return clk; +} diff --git a/drivers/clk/tegra/clk.h b/drivers/clk/tegra/clk.h index a62ea73..6249190 100644 --- a/drivers/clk/tegra/clk.h +++ b/drivers/clk/tegra/clk.h @@ -686,6 +686,8 @@ struct tegra_periph_init_data { struct tegra_clk_super_mux { struct clk_hw hw; void __iomem *reg; + struct tegra_clk_frac_div frac_div; + const struct clk_ops *div_ops; u8 width; u8 flags; u8 div2_index; @@ -702,7 +704,10 @@ struct clk *tegra_clk_register_super_mux(const char *name, const char **parent_names, u8 num_parents, unsigned long flags, void __iomem *reg, u8 clk_super_flags, u8 width, u8 pllx_index, u8 div2_index, spinlock_t *lock); - +struct clk *tegra_clk_register_super_clk(const char *name, + const char **parent_names, u8 num_parents, + unsigned long flags, void __iomem *reg, u8 clk_super_flags, + spinlock_t *lock); /** * struct clk_init_table - clock initialization table * @clk_id: clock id as mentioned in device tree bindings