From patchwork Wed Jan 12 17:45:46 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Biju Das X-Patchwork-Id: 12711760 X-Patchwork-Delegate: geert@linux-m68k.org 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6B484C433FE for ; Wed, 12 Jan 2022 17:46:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240289AbiALRqZ (ORCPT ); Wed, 12 Jan 2022 12:46:25 -0500 Received: from relmlor1.renesas.com ([210.160.252.171]:16306 "EHLO relmlie5.idc.renesas.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1355924AbiALRqY (ORCPT ); Wed, 12 Jan 2022 12:46:24 -0500 X-IronPort-AV: E=Sophos;i="5.88,282,1635174000"; d="scan'208";a="106270329" Received: from unknown (HELO relmlir5.idc.renesas.com) ([10.200.68.151]) by relmlie5.idc.renesas.com with ESMTP; 13 Jan 2022 02:46:23 +0900 Received: from localhost.localdomain (unknown [10.226.92.38]) by relmlir5.idc.renesas.com (Postfix) with ESMTP id 8044340083E1; Thu, 13 Jan 2022 02:46:21 +0900 (JST) From: Biju Das To: Michael Turquette , Stephen Boyd Cc: Biju Das , Geert Uytterhoeven , linux-renesas-soc@vger.kernel.org, linux-clk@vger.kernel.org, Chris Paterson , Biju Das , Prabhakar Mahadev Lad Subject: [RFC 02/28] clk: renesas: rzg2l: Add PLL5_4 clk mux support Date: Wed, 12 Jan 2022 17:45:46 +0000 Message-Id: <20220112174612.10773-3-biju.das.jz@bp.renesas.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20220112174612.10773-1-biju.das.jz@bp.renesas.com> References: <20220112174612.10773-1-biju.das.jz@bp.renesas.com> Precedence: bulk List-ID: X-Mailing-List: linux-renesas-soc@vger.kernel.org Add PLL5_4 clk mux support to select clock from different clock sources FOUTPOSTDIV and FOUT1PH0. This patch uses the LUT to select the source based on DSI/DPI mode and frequencies. Signed-off-by: Biju Das --- drivers/clk/renesas/rzg2l-cpg.c | 86 +++++++++++++++++++++++++++++++++ drivers/clk/renesas/rzg2l-cpg.h | 8 +++ 2 files changed, 94 insertions(+) diff --git a/drivers/clk/renesas/rzg2l-cpg.c b/drivers/clk/renesas/rzg2l-cpg.c index c6f609c9fa6d..0d652f26cc2f 100644 --- a/drivers/clk/renesas/rzg2l-cpg.c +++ b/drivers/clk/renesas/rzg2l-cpg.c @@ -334,6 +334,89 @@ static int rzg2l_cpg_sipll5_get_index(unsigned long rate, return i; } +struct pll5_mux_hw_data { + struct clk_hw hw; + u32 conf; + unsigned long rate; + struct rzg2l_cpg_priv *priv; +}; + +#define to_pll5_mux_hw_data(_hw) container_of(_hw, struct pll5_mux_hw_data, hw) + +static int rzg2l_cpg_pll5_4_clk_mux_determine_rate(struct clk_hw *hw, + struct clk_rate_request *req) +{ + struct clk_hw *parent; + struct pll5_mux_hw_data *hwdata = to_pll5_mux_hw_data(hw); + struct rzg2l_cpg_priv *priv = hwdata->priv; + const struct rzg2l_pll5_param *s_table = priv->pll5_table; + int index = rzg2l_cpg_sipll5_get_index(req->rate, s_table, priv->num_pll5_entries); + + parent = clk_hw_get_parent_by_index(hw, s_table[index].clksrc); + req->best_parent_hw = parent; + req->best_parent_rate = req->rate; + if (s_table[index].clksrc) + req->best_parent_rate /= 2; + + return 0; +} + +static int rzg2l_cpg_pll5_4_clk_mux_set_parent(struct clk_hw *hw, u8 index) +{ + struct pll5_mux_hw_data *hwdata = to_pll5_mux_hw_data(hw); + struct rzg2l_cpg_priv *priv = hwdata->priv; + + writel(index ? 0x10001 : 0x10000, priv->base + CPG_OTHERFUNC1_REG); + + return 0; +} + +static u8 rzg2l_cpg_pll5_4_clk_mux_get_parent(struct clk_hw *hw) +{ + struct pll5_mux_hw_data *hwdata = to_pll5_mux_hw_data(hw); + struct rzg2l_cpg_priv *priv = hwdata->priv; + + return readl(priv->base + GET_REG_OFFSET(hwdata->conf)); +} + +static const struct clk_ops rzg2l_cpg_pll5_4_clk_mux_ops = { + .determine_rate = rzg2l_cpg_pll5_4_clk_mux_determine_rate, + .set_parent = rzg2l_cpg_pll5_4_clk_mux_set_parent, + .get_parent = rzg2l_cpg_pll5_4_clk_mux_get_parent, +}; + +static struct clk * __init +rzg2l_cpg_pll5_4_mux_clk_register(const struct cpg_core_clk *core, + struct rzg2l_cpg_priv *priv) +{ + struct pll5_mux_hw_data *clk_hw_data; + struct clk_init_data init; + struct clk_hw *clk_hw; + int ret; + + clk_hw_data = devm_kzalloc(priv->dev, sizeof(*clk_hw_data), GFP_KERNEL); + if (!clk_hw_data) + return ERR_PTR(-ENOMEM); + + clk_hw_data->priv = priv; + clk_hw_data->conf = core->conf; + + init.name = core->name; + init.ops = &rzg2l_cpg_pll5_4_clk_mux_ops; + init.flags = CLK_SET_RATE_PARENT; + init.num_parents = core->num_parents; + init.parent_names = core->parent_names; + + clk_hw = &clk_hw_data->hw; + clk_hw->init = &init; + + ret = devm_clk_hw_register(priv->dev, clk_hw); + if (ret) + return ERR_PTR(ret); + + return clk_hw->clk; +} + struct sipll5 { struct clk_hw hw; unsigned int conf; @@ -635,6 +718,9 @@ rzg2l_cpg_register_core_clk(const struct cpg_core_clk *core, case CLK_TYPE_SD_MUX: clk = rzg2l_cpg_sd_mux_clk_register(core, priv->base, priv); break; + case CLK_TYPE_PLL5_4_MUX: + clk = rzg2l_cpg_pll5_4_mux_clk_register(core, priv); + break; default: goto fail; } diff --git a/drivers/clk/renesas/rzg2l-cpg.h b/drivers/clk/renesas/rzg2l-cpg.h index 75b3a3bbbb60..4315d7ceb87d 100644 --- a/drivers/clk/renesas/rzg2l-cpg.h +++ b/drivers/clk/renesas/rzg2l-cpg.h @@ -24,6 +24,7 @@ #define CPG_PL3_SSEL (0x408) #define CPG_PL6_SSEL (0x414) #define CPG_PL6_ETH_SSEL (0x418) +#define CPG_OTHERFUNC1_REG (0xBE8) #define CPG_SIPLL5_MON_PLL5_LOCK BIT(4) @@ -51,6 +52,7 @@ (((offset) << 20) | ((bitpos) << 12) | ((size) << 8)) #define SEL_PLL3_3 SEL_PLL_PACK(CPG_PL3_SSEL, 8, 1) +#define SEL_PLL5_4 SEL_PLL_PACK(CPG_OTHERFUNC1_REG, 0, 1) #define SEL_PLL6_2 SEL_PLL_PACK(CPG_PL6_ETH_SSEL, 0, 1) #define SEL_GPU2 SEL_PLL_PACK(CPG_PL6_SSEL, 12, 1) @@ -97,6 +99,9 @@ enum clk_types { /* Clock for SIPLL5 */ CLK_TYPE_SIPLL5, + + /* Clock for PLL5_4 clock source selector */ + CLK_TYPE_PLL5_4_MUX, }; #define DEF_TYPE(_name, _id, _type...) \ @@ -122,6 +127,9 @@ enum clk_types { .parent_names = _parent_names, .num_parents = _num_parents) #define DEF_PLL5_FOUTPOSTDIV(_name, _id, _parent) \ DEF_TYPE(_name, _id, CLK_TYPE_SIPLL5, .parent = _parent) +#define DEF_PLL5_4_MUX(_name, _id, _conf, _parent_names, _num_parents) \ + DEF_TYPE(_name, _id, CLK_TYPE_PLL5_4_MUX, .conf = _conf, \ + .parent_names = _parent_names, .num_parents = _num_parents) /** * struct rzg2l_mod_clk - Module Clocks definitions