From patchwork Fri Jun 7 10:12:33 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vinod Koul X-Patchwork-Id: 10981319 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id B85FB6C5 for ; Fri, 7 Jun 2019 10:16:01 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id A522128A5F for ; Fri, 7 Jun 2019 10:16:01 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 9701128A93; Fri, 7 Jun 2019 10:16:01 +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=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,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 B570F28A5F for ; Fri, 7 Jun 2019 10:16:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727337AbfFGKQA (ORCPT ); Fri, 7 Jun 2019 06:16:00 -0400 Received: from mail.kernel.org ([198.145.29.99]:40790 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727143AbfFGKQA (ORCPT ); Fri, 7 Jun 2019 06:16:00 -0400 Received: from localhost.localdomain (unknown [106.200.230.232]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 0DB7F208E3; Fri, 7 Jun 2019 10:15:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1559902558; bh=MBIk8F26ksBtWPrZisF10coHgN3pEICRpQDSjmSW4Xo=; h=From:To:Cc:Subject:Date:From; b=Uo6+9lPPTMXkHkwlXFRjW/w+L6gIW4xgn2vuH6w5yf4aB5mzqnxJa6GzwhIpDmwiw RsVKo+vYmF7IQK32QMJ6dea2zudf5DiUscT+O2qQGfBfm/yPw0lVMSOQYKJckwxmYl EkjsaLNUTQmzYz0kdDUzPMZiAAboo77ZWX21Ps5Q= From: Vinod Koul To: Stephen Boyd Cc: linux-arm-msm@vger.kernel.org, Bjorn Andersson , Deepak Katragadda , Andy Gross , David Brown , Michael Turquette , linux-clk@vger.kernel.org, Taniya Das , Vinod Koul Subject: [PATCH 1/2] clk: qcom: clk-alpha-pll: Add support for Trion PLLs Date: Fri, 7 Jun 2019 15:42:33 +0530 Message-Id: <20190607101234.30449-1-vkoul@kernel.org> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 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 From: Deepak Katragadda Add programming sequence support for managing the Trion PLLs. Signed-off-by: Deepak Katragadda Signed-off-by: Taniya Das [vkoul: port to upstream and tidy-up] Signed-off-by: Vinod Koul Acked-by: Rob Herring --- drivers/clk/qcom/clk-alpha-pll.c | 266 +++++++++++++++++++++++++++++++ drivers/clk/qcom/clk-alpha-pll.h | 9 ++ 2 files changed, 275 insertions(+) diff --git a/drivers/clk/qcom/clk-alpha-pll.c b/drivers/clk/qcom/clk-alpha-pll.c index 0ced4a5a9a17..bf36a929458b 100644 --- a/drivers/clk/qcom/clk-alpha-pll.c +++ b/drivers/clk/qcom/clk-alpha-pll.c @@ -32,6 +32,7 @@ # define PLL_LOCK_DET BIT(31) #define PLL_L_VAL(p) ((p)->offset + (p)->regs[PLL_OFF_L_VAL]) +#define PLL_CAL_L_VAL(p) ((p)->offset + (p)->regs[PLL_OFF_CAL_L_VAL]) #define PLL_ALPHA_VAL(p) ((p)->offset + (p)->regs[PLL_OFF_ALPHA_VAL]) #define PLL_ALPHA_VAL_U(p) ((p)->offset + (p)->regs[PLL_OFF_ALPHA_VAL_U]) @@ -44,14 +45,17 @@ # define PLL_VCO_MASK 0x3 #define PLL_USER_CTL_U(p) ((p)->offset + (p)->regs[PLL_OFF_USER_CTL_U]) +#define PLL_USER_CTL_U1(p) ((p)->offset + (p)->regs[PLL_OFF_USER_CTL_U1]) #define PLL_CONFIG_CTL(p) ((p)->offset + (p)->regs[PLL_OFF_CONFIG_CTL]) #define PLL_CONFIG_CTL_U(p) ((p)->offset + (p)->regs[PLL_OFF_CONFIG_CTL_U]) +#define PLL_CONFIG_CTL_U1(p) ((p)->offset + (p)->regs[PLL_OFF_CONFIG_CTL_U11]) #define PLL_TEST_CTL(p) ((p)->offset + (p)->regs[PLL_OFF_TEST_CTL]) #define PLL_TEST_CTL_U(p) ((p)->offset + (p)->regs[PLL_OFF_TEST_CTL_U]) #define PLL_STATUS(p) ((p)->offset + (p)->regs[PLL_OFF_STATUS]) #define PLL_OPMODE(p) ((p)->offset + (p)->regs[PLL_OFF_OPMODE]) #define PLL_FRAC(p) ((p)->offset + (p)->regs[PLL_OFF_FRAC]) +#define PLL_CAL_VAL(p) ((p)->offset + (p)->regs[PLL_OFF_CAL_VAL]) const u8 clk_alpha_pll_regs[][PLL_OFF_MAX_REGS] = { [CLK_ALPHA_PLL_TYPE_DEFAULT] = { @@ -96,6 +100,22 @@ const u8 clk_alpha_pll_regs[][PLL_OFF_MAX_REGS] = { [PLL_OFF_OPMODE] = 0x2c, [PLL_OFF_FRAC] = 0x38, }, + [CLK_ALPHA_PLL_TYPE_TRION] = { + [PLL_OFF_L_VAL] = 0x04, + [PLL_OFF_CAL_L_VAL] = 0x08, + [PLL_OFF_USER_CTL] = 0x0c, + [PLL_OFF_USER_CTL_U] = 0x10, + [PLL_OFF_USER_CTL_U1] = 0x14, + [PLL_OFF_CONFIG_CTL] = 0x18, + [PLL_OFF_CONFIG_CTL_U] = 0x1c, + [PLL_OFF_CONFIG_CTL_U1] = 0x20, + [PLL_OFF_TEST_CTL] = 0x24, + [PLL_OFF_TEST_CTL_U] = 0x28, + [PLL_OFF_STATUS] = 0x30, + [PLL_OFF_OPMODE] = 0x38, + [PLL_OFF_ALPHA_VAL] = 0x40, + [PLL_OFF_CAL_VAL] = 0x44, + }, }; EXPORT_SYMBOL_GPL(clk_alpha_pll_regs); @@ -120,6 +140,15 @@ EXPORT_SYMBOL_GPL(clk_alpha_pll_regs); #define FABIA_PLL_OUT_MASK 0x7 #define FABIA_PLL_RATE_MARGIN 500 +#define TRION_PLL_CAL_VAL 0x44 +#define TRION_PLL_STANDBY 0x0 +#define TRION_PLL_RUN 0x1 +#define TRION_PLL_OUT_MASK 0x7 +#define TRION_PCAL_DONE BIT(26) +#define TRION_PLL_RATE_MARGIN 500 + +#define XO_RATE 19200000 + #define pll_alpha_width(p) \ ((PLL_ALPHA_VAL_U(p) - PLL_ALPHA_VAL(p) == 4) ? \ ALPHA_REG_BITWIDTH : ALPHA_REG_16BIT_WIDTH) @@ -392,6 +421,15 @@ alpha_pll_round_rate(unsigned long rate, unsigned long prate, u32 *l, u64 *a, u64 remainder; u64 quotient; + /* + * The PLLs parent rate is zero probably since the parent hasn't + * registered yet. Return early with the requested rate. + */ + if (!prate) { + pr_warn("PLLs parent rate hasn't been initialized.\n"); + return rate; + } + quotient = rate; remainder = do_div(quotient, prate); *l = quotient; @@ -730,6 +768,136 @@ static long alpha_pll_huayra_round_rate(struct clk_hw *hw, unsigned long rate, return alpha_huayra_pll_round_rate(rate, *prate, &l, &a); } +static int trion_pll_is_enabled(struct clk_alpha_pll *pll, + struct regmap *regmap) +{ + u32 mode_regval, opmode_regval; + int ret; + + ret = regmap_read(regmap, PLL_MODE(pll), &mode_regval); + ret |= regmap_read(regmap, PLL_OPMODE(pll), &opmode_regval); + if (ret) + return 0; + + return ((opmode_regval & TRION_PLL_RUN) && (mode_regval & PLL_OUTCTRL)); +} + +static int clk_trion_pll_enable(struct clk_hw *hw) +{ + struct clk_alpha_pll *pll = to_clk_alpha_pll(hw); + struct regmap *regmap = pll->clkr.regmap; + u32 val; + int ret; + + ret = regmap_read(regmap, PLL_MODE(pll), &val); + if (ret) + return ret; + + /* If in FSM mode, just vote for it */ + if (val & PLL_VOTE_FSM_ENA) { + ret = clk_enable_regmap(hw); + if (ret) + return ret; + return wait_for_pll_enable_active(pll); + } + + /* Set operation mode to RUN */ + regmap_write(regmap, PLL_OPMODE(pll), TRION_PLL_RUN); + + ret = wait_for_pll_enable_lock(pll); + if (ret) + return ret; + + /* Enable the PLL outputs */ + ret = regmap_update_bits(regmap, PLL_USER_CTL(pll), + TRION_PLL_OUT_MASK, TRION_PLL_OUT_MASK); + if (ret) + return ret; + + /* Enable the global PLL outputs */ + ret = regmap_update_bits(regmap, PLL_MODE(pll), + PLL_OUTCTRL, PLL_OUTCTRL); + if (ret) + return ret; + + /* Ensure that the write above goes through before returning. */ + mb(); + return ret; +} + +static void clk_trion_pll_disable(struct clk_hw *hw) +{ + struct clk_alpha_pll *pll = to_clk_alpha_pll(hw); + struct regmap *regmap = pll->clkr.regmap; + u32 val; + int ret; + + ret = regmap_read(regmap, PLL_MODE(pll), &val); + if (ret) + return; + + /* If in FSM mode, just unvote it */ + if (val & PLL_VOTE_FSM_ENA) { + clk_disable_regmap(hw); + return; + } + + /* Disable the global PLL output */ + ret = regmap_update_bits(regmap, PLL_MODE(pll), PLL_OUTCTRL, 0); + if (ret) + return; + + /* Disable the PLL outputs */ + ret = regmap_update_bits(regmap, PLL_USER_CTL(pll), + TRION_PLL_OUT_MASK, 0); + if (ret) + return; + + /* Place the PLL mode in STANDBY */ + regmap_write(regmap, PLL_OPMODE(pll), TRION_PLL_STANDBY); + regmap_update_bits(regmap, PLL_MODE(pll), PLL_RESET_N, PLL_RESET_N); +} + +static unsigned long +clk_trion_pll_recalc_rate(struct clk_hw *hw, unsigned long parent_rate) +{ + struct clk_alpha_pll *pll = to_clk_alpha_pll(hw); + struct regmap *regmap = pll->clkr.regmap; + u32 l, frac; + u64 prate = parent_rate; + + regmap_read(regmap, PLL_L_VAL(pll), &l); + regmap_read(regmap, PLL_ALPHA_VAL(pll), &frac); + + return alpha_pll_calc_rate(prate, l, frac, ALPHA_REG_16BIT_WIDTH); +} + +static int clk_trion_pll_is_enabled(struct clk_hw *hw) +{ + struct clk_alpha_pll *pll = to_clk_alpha_pll(hw); + + return trion_pll_is_enabled(pll, pll->clkr.regmap); +} + +static long clk_trion_pll_round_rate(struct clk_hw *hw, unsigned long rate, + unsigned long *prate) +{ + struct clk_alpha_pll *pll = to_clk_alpha_pll(hw); + unsigned long min_freq, max_freq; + u32 l; + u64 a; + + rate = alpha_pll_round_rate(rate, *prate, + &l, &a, ALPHA_REG_16BIT_WIDTH); + if (!pll->vco_table || alpha_pll_find_vco(pll, rate)) + return rate; + + min_freq = pll->vco_table[0].min_freq; + max_freq = pll->vco_table[pll->num_vco - 1].max_freq; + + return clamp(rate, min_freq, max_freq); +} + const struct clk_ops clk_alpha_pll_ops = { .enable = clk_alpha_pll_enable, .disable = clk_alpha_pll_disable, @@ -760,6 +928,15 @@ const struct clk_ops clk_alpha_pll_hwfsm_ops = { }; EXPORT_SYMBOL_GPL(clk_alpha_pll_hwfsm_ops); +const struct clk_ops clk_trion_fixed_pll_ops = { + .enable = clk_trion_pll_enable, + .disable = clk_trion_pll_disable, + .is_enabled = clk_trion_pll_is_enabled, + .recalc_rate = clk_trion_pll_recalc_rate, + .round_rate = clk_trion_pll_round_rate, +}; +EXPORT_SYMBOL_GPL(clk_trion_fixed_pll_ops); + static unsigned long clk_alpha_pll_postdiv_recalc_rate(struct clk_hw *hw, unsigned long parent_rate) { @@ -902,6 +1079,10 @@ static int alpha_pll_fabia_enable(struct clk_hw *hw) ret = regmap_read(regmap, PLL_OPMODE(pll), &opmode_val); if (ret) return ret; + ret = regmap_update_bits(regmap, PLL_MODE(pll), + PLL_BYPASSNL, PLL_BYPASSNL); + if (ret) + return ret; /* Skip If PLL is already running */ if ((opmode_val & FABIA_OPMODE_RUN) && (val & PLL_OUTCTRL)) @@ -1058,6 +1239,91 @@ static unsigned long clk_alpha_pll_postdiv_fabia_recalc_rate(struct clk_hw *hw, return (parent_rate / div); } +static unsigned long +clk_trion_pll_postdiv_recalc_rate(struct clk_hw *hw, unsigned long parent_rate) +{ + struct clk_alpha_pll_postdiv *pll = to_clk_alpha_pll_postdiv(hw); + struct regmap *regmap = pll->clkr.regmap; + u32 i, div = 1, val; + + if (!pll->post_div_table) { + pr_err("Missing the post_div_table for the PLL\n"); + return -EINVAL; + } + + regmap_read(regmap, PLL_USER_CTL(pll), &val); + + val >>= pll->post_div_shift; + val &= PLL_POST_DIV_MASK(pll); + + for (i = 0; i < pll->num_post_div; i++) { + if (pll->post_div_table[i].val == val) { + div = pll->post_div_table[i].div; + break; + } + } + + return (parent_rate / div); +} + +static long +clk_trion_pll_postdiv_round_rate(struct clk_hw *hw, unsigned long rate, + unsigned long *prate) +{ + struct clk_alpha_pll_postdiv *pll = to_clk_alpha_pll_postdiv(hw); + + if (!pll->post_div_table) { + pr_err("Missing the post_div_table for the PLL\n"); + return -EINVAL; + } + + return divider_round_rate(hw, rate, prate, pll->post_div_table, + pll->width, CLK_DIVIDER_ROUND_CLOSEST); +}; + +static int +clk_trion_pll_postdiv_set_rate(struct clk_hw *hw, unsigned long rate, + unsigned long parent_rate) +{ + struct clk_alpha_pll_postdiv *pll = to_clk_alpha_pll_postdiv(hw); + struct regmap *regmap = pll->clkr.regmap; + int i, val = 0, div, ret; + + /* + * If the PLL is in FSM mode, then treat the set_rate callback + * as a no-operation. + */ + ret = regmap_read(regmap, PLL_MODE(pll), &val); + if (ret) + return ret; + + if (val & PLL_VOTE_FSM_ENA) + return 0; + + if (!pll->post_div_table) { + pr_err("Missing the post_div_table for the PLL\n"); + return -EINVAL; + } + + div = DIV_ROUND_UP_ULL((u64)parent_rate, rate); + for (i = 0; i < pll->num_post_div; i++) { + if (pll->post_div_table[i].div == div) { + val = pll->post_div_table[i].val; + break; + } + } + return regmap_update_bits(regmap, PLL_USER_CTL(pll), + PLL_POST_DIV_MASK(pll) << PLL_POST_DIV_SHIFT, + val << PLL_POST_DIV_SHIFT); +} + +const struct clk_ops clk_trion_pll_postdiv_ops = { + .recalc_rate = clk_trion_pll_postdiv_recalc_rate, + .round_rate = clk_trion_pll_postdiv_round_rate, + .set_rate = clk_trion_pll_postdiv_set_rate, +}; +EXPORT_SYMBOL_GPL(clk_trion_pll_postdiv_ops); + static long clk_alpha_pll_postdiv_fabia_round_rate(struct clk_hw *hw, unsigned long rate, unsigned long *prate) { diff --git a/drivers/clk/qcom/clk-alpha-pll.h b/drivers/clk/qcom/clk-alpha-pll.h index 66755f0f84fc..a2f844c66207 100644 --- a/drivers/clk/qcom/clk-alpha-pll.h +++ b/drivers/clk/qcom/clk-alpha-pll.h @@ -13,22 +13,27 @@ enum { CLK_ALPHA_PLL_TYPE_HUAYRA, CLK_ALPHA_PLL_TYPE_BRAMMO, CLK_ALPHA_PLL_TYPE_FABIA, + CLK_ALPHA_PLL_TYPE_TRION, CLK_ALPHA_PLL_TYPE_MAX, }; enum { PLL_OFF_L_VAL, + PLL_OFF_CAL_L_VAL, PLL_OFF_ALPHA_VAL, PLL_OFF_ALPHA_VAL_U, PLL_OFF_USER_CTL, PLL_OFF_USER_CTL_U, + PLL_OFF_USER_CTL_U1, PLL_OFF_CONFIG_CTL, PLL_OFF_CONFIG_CTL_U, + PLL_OFF_CONFIG_CTL_U1, PLL_OFF_TEST_CTL, PLL_OFF_TEST_CTL_U, PLL_OFF_STATUS, PLL_OFF_OPMODE, PLL_OFF_FRAC, + PLL_OFF_CAL_VAL, PLL_OFF_MAX_REGS }; @@ -43,6 +48,7 @@ struct pll_vco { /** * struct clk_alpha_pll - phase locked loop (PLL) * @offset: base address of registers + * @inited: flag that's set when the PLL is initialized * @vco_table: array of VCO settings * @regs: alpha pll register map (see @clk_alpha_pll_regs) * @clkr: regmap clock handle @@ -50,6 +56,7 @@ struct pll_vco { struct clk_alpha_pll { u32 offset; const u8 *regs; + bool inited; const struct pll_vco *vco_table; size_t num_vco; @@ -117,5 +124,7 @@ void clk_alpha_pll_configure(struct clk_alpha_pll *pll, struct regmap *regmap, const struct alpha_pll_config *config); void clk_fabia_pll_configure(struct clk_alpha_pll *pll, struct regmap *regmap, const struct alpha_pll_config *config); +extern const struct clk_ops clk_trion_fixed_pll_ops; +extern const struct clk_ops clk_trion_pll_postdiv_ops; #endif