From patchwork Wed Oct 14 02:28:53 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: zhangqing X-Patchwork-Id: 11836663 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 3908A921 for ; Wed, 14 Oct 2020 02:29:06 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 0DFA721D81 for ; Wed, 14 Oct 2020 02:29:06 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="qzldKEd8" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 0DFA721D81 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=rock-chips.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-rockchip-bounces+patchwork-linux-rockchip=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:MIME-Version:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:References:In-Reply-To:Message-Id:Date:Subject:To: From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=s5X4CMITaNacGUsx1uBfn/NB0u/neU4/rPz0W0n2Z0c=; b=qzldKEd8ogpGwYoGwtZA1gzU5e hJ+nnAA8S0L4gDiqnEhmlIEm0gOjQF5jTNw8EnDK4z7Sw423vBDSFkZDNJy0kN85KEwT0omjGcjY4 ZN+UFzy/Vs0ioOePvuohmWCpV+sVMLgexa3eKXTnmslXa3qviT+f5zvMjpcghj1lwkVjrZ5wq6Yc5 VNR7FoiD9sQOrNjsIC0gs641gxsoIrqne37fx1XCDRsymTauTFvRDEh3AOUuyqjS7Vjmv7GjWvzZK yNX9aXP3HBK+yjAQS3tdk+fLW/gCwcDgRLb/cy/GtuGRxx4FwiKImNFKd7PN3iWWtZPklu+mZ4D1P gRBPUtTQ==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kSWXE-0002gX-QW; Wed, 14 Oct 2020 02:29:00 +0000 Received: from lucky1.263xmail.com ([211.157.147.132]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1kSWXC-0002fe-67 for linux-rockchip@lists.infradead.org; Wed, 14 Oct 2020 02:28:59 +0000 Received: from localhost (unknown [192.168.167.32]) by lucky1.263xmail.com (Postfix) with ESMTP id A9102EF3A8; Wed, 14 Oct 2020 10:28:55 +0800 (CST) X-MAIL-GRAY: 0 X-MAIL-DELIVERY: 1 X-ADDR-CHECKED4: 1 X-ANTISPAM-LEVEL: 2 X-ABS-CHECKED: 0 Received: from localhost.localdomain (unknown [58.22.7.114]) by smtp.263.net (postfix) whith ESMTP id P19667T139951086470912S1602642534014047_; Wed, 14 Oct 2020 10:28:55 +0800 (CST) X-IP-DOMAINF: 1 X-UNIQUE-TAG: X-RL-SENDER: zhangqing@rock-chips.com X-SENDER: zhangqing@rock-chips.com X-LOGIN-NAME: zhangqing@rock-chips.com X-FST-TO: heiko@sntech.de X-SENDER-IP: 58.22.7.114 X-ATTACHMENT-NUM: 0 X-DNS-TYPE: 0 X-System-Flag: 0 From: Elaine Zhang To: heiko@sntech.de Subject: [PATCH v4 5/5] clk: rockchip: support pll setting by auto Date: Wed, 14 Oct 2020 10:28:53 +0800 Message-Id: <20201014022853.7039-1-zhangqing@rock-chips.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20201014022812.6733-1-zhangqing@rock-chips.com> References: <20201014022812.6733-1-zhangqing@rock-chips.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20201013_222858_713508_5CC7FFBF X-CRM114-Status: GOOD ( 22.45 ) X-Spam-Score: 1.5 (+) X-Spam-Report: SpamAssassin version 3.4.4 on merlin.infradead.org summary: Content analysis details: (1.5 points) pts rule name description ---- ---------------------- -------------------------------------------------- 1.5 RCVD_IN_SORBS_WEB RBL: SORBS: sender is an abusable web server [58.22.7.114 listed in dnsbl.sorbs.net] -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no trust [211.157.147.132 listed in list.dnswl.org] 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record 0.0 T_SPF_PERMERROR SPF: test of record failed (permerror) -0.0 RCVD_IN_MSPIKE_H2 RBL: Average reputation (+2) [211.157.147.132 listed in wl.mailspike.net] X-BeenThere: linux-rockchip@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Upstream kernel work for Rockchip platforms List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: huangtao@rock-chips.com, xf@rock-chips.com, sboyd@kernel.org, mturquette@baylibre.com, Elaine Zhang , linux-kernel@vger.kernel.org, linux-clk@vger.kernel.org, kever.yang@rock-chips.com, linux-rockchip@lists.infradead.org, xxx@rock-chips.com MIME-Version: 1.0 Sender: "Linux-rockchip" Errors-To: linux-rockchip-bounces+patchwork-linux-rockchip=patchwork.kernel.org@lists.infradead.org If setting freq is not support in rockchip_pll_rate_table, It can calculate and set pll params by auto. Signed-off-by: Elaine Zhang --- drivers/clk/rockchip/clk-pll.c | 215 ++++++++++++++++++++++++++++++--- 1 file changed, 200 insertions(+), 15 deletions(-) diff --git a/drivers/clk/rockchip/clk-pll.c b/drivers/clk/rockchip/clk-pll.c index 8adc6f54a605..e8ca86f5b7d1 100644 --- a/drivers/clk/rockchip/clk-pll.c +++ b/drivers/clk/rockchip/clk-pll.c @@ -15,6 +15,7 @@ #include #include #include +#include #include "clk.h" #define PLL_MODE_MASK 0x3 @@ -47,6 +48,198 @@ struct rockchip_clk_pll { #define to_rockchip_clk_pll_nb(nb) \ container_of(nb, struct rockchip_clk_pll, clk_nb) +#define MHZ (1000UL * 1000UL) +#define KHZ (1000UL) + +/* CLK_PLL_TYPE_RK3066_AUTO type ops */ +#define PLL_FREF_MIN (269 * KHZ) +#define PLL_FREF_MAX (2200 * MHZ) + +#define PLL_FVCO_MIN (440 * MHZ) +#define PLL_FVCO_MAX (2200 * MHZ) + +#define PLL_FOUT_MIN (27500 * KHZ) +#define PLL_FOUT_MAX (2200 * MHZ) + +#define PLL_NF_MAX (4096) +#define PLL_NR_MAX (64) +#define PLL_NO_MAX (16) + +/* CLK_PLL_TYPE_RK3036/3366/3399_AUTO type ops */ +#define MIN_FOUTVCO_FREQ (800 * MHZ) +#define MAX_FOUTVCO_FREQ (2000 * MHZ) + +static struct rockchip_pll_rate_table auto_table; + +static struct rockchip_pll_rate_table *rk_pll_rate_table_get(void) +{ + return &auto_table; +} + +static int rockchip_pll_clk_set_postdiv(unsigned long fout_hz, + u32 *postdiv1, + u32 *postdiv2, + u32 *foutvco) +{ + unsigned long freq; + + if (fout_hz < MIN_FOUTVCO_FREQ) { + for (*postdiv1 = 1; *postdiv1 <= 7; (*postdiv1)++) { + for (*postdiv2 = 1; *postdiv2 <= 7; (*postdiv2)++) { + freq = fout_hz * (*postdiv1) * (*postdiv2); + if (freq >= MIN_FOUTVCO_FREQ && + freq <= MAX_FOUTVCO_FREQ) { + *foutvco = freq; + return 0; + } + } + } + pr_err("CANNOT FIND postdiv1/2 to make fout in range from 800M to 2000M,fout = %lu\n", + fout_hz); + } else { + *postdiv1 = 1; + *postdiv2 = 1; + } + return 0; +} + +static struct rockchip_pll_rate_table * +rockchip_pll_clk_set_by_auto(struct rockchip_clk_pll *pll, + unsigned long fin_hz, + unsigned long fout_hz) +{ + struct rockchip_pll_rate_table *rate_table = rk_pll_rate_table_get(); + /* FIXME set postdiv1/2 always 1*/ + u32 foutvco = fout_hz; + u64 fin_64, frac_64; + u32 f_frac, postdiv1, postdiv2; + unsigned long clk_gcd = 0; + + if (fin_hz == 0 || fout_hz == 0 || fout_hz == fin_hz) + return NULL; + + rockchip_pll_clk_set_postdiv(fout_hz, &postdiv1, &postdiv2, &foutvco); + rate_table->postdiv1 = postdiv1; + rate_table->postdiv2 = postdiv2; + rate_table->dsmpd = 1; + + if (fin_hz / MHZ * MHZ == fin_hz && fout_hz / MHZ * MHZ == fout_hz) { + fin_hz /= MHZ; + foutvco /= MHZ; + clk_gcd = gcd(fin_hz, foutvco); + rate_table->refdiv = fin_hz / clk_gcd; + rate_table->fbdiv = foutvco / clk_gcd; + + rate_table->frac = 0; + + pr_debug("fin = %lu, fout = %lu, clk_gcd = %lu, refdiv = %u, fbdiv = %u, postdiv1 = %u, postdiv2 = %u, frac = %u\n", + fin_hz, fout_hz, clk_gcd, rate_table->refdiv, + rate_table->fbdiv, rate_table->postdiv1, + rate_table->postdiv2, rate_table->frac); + } else { + pr_debug("frac div running, fin_hz = %lu, fout_hz = %lu, fin_INT_mhz = %lu, fout_INT_mhz = %lu\n", + fin_hz, fout_hz, + fin_hz / MHZ * MHZ, + fout_hz / MHZ * MHZ); + pr_debug("frac get postdiv1 = %u, postdiv2 = %u, foutvco = %u\n", + rate_table->postdiv1, rate_table->postdiv2, foutvco); + clk_gcd = gcd(fin_hz / MHZ, foutvco / MHZ); + rate_table->refdiv = fin_hz / MHZ / clk_gcd; + rate_table->fbdiv = foutvco / MHZ / clk_gcd; + pr_debug("frac get refdiv = %u, fbdiv = %u\n", + rate_table->refdiv, rate_table->fbdiv); + + rate_table->frac = 0; + + f_frac = (foutvco % MHZ); + fin_64 = fin_hz; + do_div(fin_64, (u64)rate_table->refdiv); + frac_64 = (u64)f_frac << 24; + do_div(frac_64, fin_64); + rate_table->frac = (u32)frac_64; + if (rate_table->frac > 0) + rate_table->dsmpd = 0; + pr_debug("frac = %x\n", rate_table->frac); + } + return rate_table; +} + +static struct rockchip_pll_rate_table * +rockchip_rk3066_pll_clk_set_by_auto(struct rockchip_clk_pll *pll, + unsigned long fin_hz, + unsigned long fout_hz) +{ + struct rockchip_pll_rate_table *rate_table = rk_pll_rate_table_get(); + u32 nr, nf, no, nonr; + u32 nr_out, nf_out, no_out; + u32 n; + u32 numerator, denominator; + u64 fref, fvco, fout; + unsigned long clk_gcd = 0; + + nr_out = PLL_NR_MAX + 1; + no_out = 0; + nf_out = 0; + + if (fin_hz == 0 || fout_hz == 0 || fout_hz == fin_hz) + return NULL; + + clk_gcd = gcd(fin_hz, fout_hz); + + numerator = fout_hz / clk_gcd; + denominator = fin_hz / clk_gcd; + + for (n = 1;; n++) { + nf = numerator * n; + nonr = denominator * n; + if (nf > PLL_NF_MAX || nonr > (PLL_NO_MAX * PLL_NR_MAX)) + break; + + for (no = 1; no <= PLL_NO_MAX; no++) { + if (!(no == 1 || !(no % 2))) + continue; + + if (nonr % no) + continue; + nr = nonr / no; + + if (nr > PLL_NR_MAX) + continue; + + fref = fin_hz / nr; + if (fref < PLL_FREF_MIN || fref > PLL_FREF_MAX) + continue; + + fvco = fref * nf; + if (fvco < PLL_FVCO_MIN || fvco > PLL_FVCO_MAX) + continue; + + fout = fvco / no; + if (fout < PLL_FOUT_MIN || fout > PLL_FOUT_MAX) + continue; + + /* select the best from all available PLL settings */ + if ((no > no_out) || + ((no == no_out) && (nr < nr_out))) { + nr_out = nr; + nf_out = nf; + no_out = no; + } + } + } + + /* output the best PLL setting */ + if ((nr_out <= PLL_NR_MAX) && (no_out > 0)) { + rate_table->nr = nr_out; + rate_table->nf = nf_out; + rate_table->no = no_out; + } else { + return NULL; + } + + return rate_table; +} + static const struct rockchip_pll_rate_table *rockchip_get_pll_settings( struct rockchip_clk_pll *pll, unsigned long rate) { @@ -58,24 +251,16 @@ static const struct rockchip_pll_rate_table *rockchip_get_pll_settings( return &rate_table[i]; } - return NULL; + if (pll->type == pll_rk3066) + return rockchip_rk3066_pll_clk_set_by_auto(pll, 24 * MHZ, rate); + else + return rockchip_pll_clk_set_by_auto(pll, 24 * MHZ, rate); } static long rockchip_pll_round_rate(struct clk_hw *hw, unsigned long drate, unsigned long *prate) { - struct rockchip_clk_pll *pll = to_rockchip_clk_pll(hw); - const struct rockchip_pll_rate_table *rate_table = pll->rate_table; - int i; - - /* Assumming rate_table is in descending order */ - for (i = 0; i < pll->rate_count; i++) { - if (drate >= rate_table[i].rate) - return rate_table[i].rate; - } - - /* return minimum supported value */ - return rate_table[i - 1].rate; + return drate; } /* @@ -165,7 +350,7 @@ static unsigned long rockchip_rk3036_pll_recalc_rate(struct clk_hw *hw, { struct rockchip_clk_pll *pll = to_rockchip_clk_pll(hw); struct rockchip_pll_rate_table cur; - u64 rate64 = prate; + u64 rate64 = prate, frac_rate64 = prate; rockchip_rk3036_pll_get_params(pll, &cur); @@ -174,7 +359,7 @@ static unsigned long rockchip_rk3036_pll_recalc_rate(struct clk_hw *hw, if (cur.dsmpd == 0) { /* fractional mode */ - u64 frac_rate64 = prate * cur.frac; + frac_rate64 *= cur.frac; do_div(frac_rate64, cur.refdiv); rate64 += frac_rate64 >> 24;