From patchwork Thu Mar 10 03:47:01 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: zhengxing X-Patchwork-Id: 8553591 Return-Path: X-Original-To: patchwork-linux-rockchip@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 630CDC0553 for ; Thu, 10 Mar 2016 03:48:39 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id BC347202E6 for ; Thu, 10 Mar 2016 03:48:36 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 700E1202DD for ; Thu, 10 Mar 2016 03:48:35 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1adraU-0000ub-TW; Thu, 10 Mar 2016 03:48:34 +0000 Received: from regular1.263xmail.com ([211.150.99.133]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1adra3-0000VK-7U; Thu, 10 Mar 2016 03:48:17 +0000 Received: from zhengxing?rock-chips.com (unknown [192.168.167.105]) by regular1.263xmail.com (Postfix) with SMTP id 61EE48653; Thu, 10 Mar 2016 11:47:42 +0800 (CST) X-263anti-spam: KSV:0; X-MAIL-GRAY: 0 X-MAIL-DELIVERY: 1 X-KSVirus-check: 0 X-ABS-CHECKED: 4 X-ADDR-CHECKED: 0 Received: from localhost.localdomain (localhost.localdomain [127.0.0.1]) by smtp.263.net (Postfix) with ESMTP id EC3B9201B7; Thu, 10 Mar 2016 11:47:38 +0800 (CST) X-RL-SENDER: zhengxing@rock-chips.com X-SENDER-IP: 58.22.7.114 X-LOGIN-NAME: zhengxing@rock-chips.com X-UNIQUE-TAG: <5f53c4650cb318b667d90cb113604ff8> X-ATTACHMENT-NUM: 0 X-SENDER: zhengxing@rock-chips.com X-DNS-TYPE: 0 Received: from unknown (unknown [58.22.7.114]) by smtp.263.net (Postfix) whith SMTP id 5630PENGS; Thu, 10 Mar 2016 11:47:40 +0800 (CST) From: Xing Zheng To: linux-rockchip@lists.infradead.org Subject: [PATCH v4 3/4] clk: rockchip: add new pll-type for rk3399 and similar socs Date: Thu, 10 Mar 2016 11:47:01 +0800 Message-Id: <1457581622-31192-4-git-send-email-zhengxing@rock-chips.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1457581622-31192-1-git-send-email-zhengxing@rock-chips.com> References: <1457581622-31192-1-git-send-email-zhengxing@rock-chips.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20160309_194808_062741_48E3828E X-CRM114-Status: GOOD ( 16.53 ) X-Spam-Score: -1.9 (-) X-BeenThere: linux-rockchip@lists.infradead.org X-Mailman-Version: 2.1.20 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, heiko@sntech.de, Xing Zheng , Michael Turquette , Stephen Boyd , dianders@chromium.org, linux-kernel@vger.kernel.org, elaine.zhang@rock-chips.com, jay.xu@rock-chips.com, linux-clk@vger.kernel.org, linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Sender: "Linux-rockchip" Errors-To: linux-rockchip-bounces+patchwork-linux-rockchip=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The rk3399's pll and clock are similar with rk3036's, it different with base on the rk3066(rk3188, rk3288, rk3368 use it), there are different adjust foctors and control registers, so these should be independent and separate from the series of rk3066s. Signed-off-by: Xing Zheng --- Changes in v4: - fix some define errors due to careless Changes in v3: None Changes in v2: None drivers/clk/rockchip/clk-pll.c | 271 +++++++++++++++++++++++++++++++++++++++- drivers/clk/rockchip/clk.h | 3 +- 2 files changed, 272 insertions(+), 2 deletions(-) diff --git a/drivers/clk/rockchip/clk-pll.c b/drivers/clk/rockchip/clk-pll.c index 27be66a..f490ce4 100644 --- a/drivers/clk/rockchip/clk-pll.c +++ b/drivers/clk/rockchip/clk-pll.c @@ -593,6 +593,267 @@ static const struct clk_ops rockchip_rk3066_pll_clk_ops = { .init = rockchip_rk3066_pll_init, }; +/** + * PLL used in RK3399 + */ + +#define RK3399_PLLCON(i) (i * 0x4) +#define RK3399_PLLCON0_FBDIV_MASK 0xfff +#define RK3399_PLLCON0_FBDIV_SHIFT 0 +#define RK3399_PLLCON1_REFDIV_MASK 0x3f +#define RK3399_PLLCON1_REFDIV_SHIFT 0 +#define RK3399_PLLCON1_POSTDIV1_MASK 0x7 +#define RK3399_PLLCON1_POSTDIV1_SHIFT 8 +#define RK3399_PLLCON1_POSTDIV2_MASK 0x7 +#define RK3399_PLLCON1_POSTDIV2_SHIFT 12 +#define RK3399_PLLCON2_FRAC_MASK 0xffffff +#define RK3399_PLLCON2_FRAC_SHIFT 0 +#define RK3399_PLLCON2_LOCK_STATUS BIT(31) +#define RK3399_PLLCON3_PWRDOWN BIT(0) +#define RK3399_PLLCON3_DSMPD_MASK 0x1 +#define RK3399_PLLCON3_DSMPD_SHIFT 3 + +static int rockchip_rk3399_pll_wait_lock(struct rockchip_clk_pll *pll) +{ + u32 pllcon; + int delay = 24000000; + + /* poll check the lock status in rk3399 xPLLCON2 */ + while (delay > 0) { + pllcon = readl_relaxed(pll->reg_base + RK3399_PLLCON(2)); + if (pllcon & RK3399_PLLCON2_LOCK_STATUS) + return 0; + + delay--; + } + + pr_err("%s: timeout waiting for pll to lock\n", __func__); + return -ETIMEDOUT; +} + +static void rockchip_rk3399_pll_get_params(struct rockchip_clk_pll *pll, + struct rockchip_pll_rate_table *rate) +{ + u32 pllcon; + + pllcon = readl_relaxed(pll->reg_base + RK3399_PLLCON(0)); + rate->fbdiv = ((pllcon >> RK3399_PLLCON0_FBDIV_SHIFT) + & RK3399_PLLCON0_FBDIV_MASK); + + pllcon = readl_relaxed(pll->reg_base + RK3399_PLLCON(1)); + rate->refdiv = ((pllcon >> RK3399_PLLCON1_REFDIV_SHIFT) + & RK3399_PLLCON1_REFDIV_MASK); + rate->postdiv1 = ((pllcon >> RK3399_PLLCON1_POSTDIV1_SHIFT) + & RK3399_PLLCON1_POSTDIV1_MASK); + rate->postdiv2 = ((pllcon >> RK3399_PLLCON1_POSTDIV2_SHIFT) + & RK3399_PLLCON1_POSTDIV2_MASK); + + pllcon = readl_relaxed(pll->reg_base + RK3399_PLLCON(2)); + rate->frac = ((pllcon >> RK3399_PLLCON2_FRAC_SHIFT) + & RK3399_PLLCON2_FRAC_MASK); + + pllcon = readl_relaxed(pll->reg_base + RK3399_PLLCON(3)); + rate->dsmpd = ((pllcon >> RK3399_PLLCON3_DSMPD_SHIFT) + & RK3399_PLLCON3_DSMPD_MASK); +} + +static unsigned long rockchip_rk3399_pll_recalc_rate(struct clk_hw *hw, + unsigned long prate) +{ + struct rockchip_clk_pll *pll = to_rockchip_clk_pll(hw); + struct rockchip_pll_rate_table cur; + u64 rate64 = prate; + + rockchip_rk3399_pll_get_params(pll, &cur); + + rate64 *= cur.fbdiv; + do_div(rate64, cur.refdiv); + + if (cur.dsmpd == 0) { + /* fractional mode */ + u64 frac_rate64 = prate * cur.frac; + + do_div(frac_rate64, cur.refdiv); + rate64 += frac_rate64 >> 24; + } + + do_div(rate64, cur.postdiv1); + do_div(rate64, cur.postdiv2); + + return (unsigned long)rate64; +} + +static int rockchip_rk3399_pll_set_params(struct rockchip_clk_pll *pll, + const struct rockchip_pll_rate_table *rate) +{ + const struct clk_ops *pll_mux_ops = pll->pll_mux_ops; + struct clk_mux *pll_mux = &pll->pll_mux; + struct rockchip_pll_rate_table cur; + u32 pllcon; + int rate_change_remuxed = 0; + int cur_parent; + int ret; + + pr_debug("%s: rate settings for %lu fbdiv: %d, postdiv1: %d, refdiv: %d, postdiv2: %d, dsmpd: %d, frac: %d\n", + __func__, rate->rate, rate->fbdiv, rate->postdiv1, rate->refdiv, + rate->postdiv2, rate->dsmpd, rate->frac); + + rockchip_rk3399_pll_get_params(pll, &cur); + cur.rate = 0; + + cur_parent = pll_mux_ops->get_parent(&pll_mux->hw); + if (cur_parent == PLL_MODE_NORM) { + pll_mux_ops->set_parent(&pll_mux->hw, PLL_MODE_SLOW); + rate_change_remuxed = 1; + } + + /* update pll values */ + writel_relaxed(HIWORD_UPDATE(rate->fbdiv, RK3399_PLLCON0_FBDIV_MASK, + RK3399_PLLCON0_FBDIV_SHIFT), + pll->reg_base + RK3399_PLLCON(0)); + + writel_relaxed(HIWORD_UPDATE(rate->refdiv, RK3399_PLLCON1_REFDIV_MASK, + RK3399_PLLCON1_REFDIV_SHIFT) | + HIWORD_UPDATE(rate->postdiv1, RK3399_PLLCON1_POSTDIV1_MASK, + RK3399_PLLCON1_POSTDIV1_SHIFT) | + HIWORD_UPDATE(rate->postdiv2, RK3399_PLLCON1_POSTDIV2_MASK, + RK3399_PLLCON1_POSTDIV2_SHIFT), + pll->reg_base + RK3399_PLLCON(1)); + + /* xPLL CON2 is not HIWORD_MASK */ + pllcon = readl_relaxed(pll->reg_base + RK3399_PLLCON(2)); + pllcon &= ~(RK3399_PLLCON2_FRAC_MASK << RK3399_PLLCON2_FRAC_SHIFT); + pllcon |= rate->frac << RK3399_PLLCON2_FRAC_SHIFT; + writel_relaxed(pllcon, pll->reg_base + RK3399_PLLCON(2)); + + writel_relaxed(HIWORD_UPDATE(rate->dsmpd, RK3399_PLLCON3_DSMPD_MASK, + RK3399_PLLCON3_DSMPD_SHIFT), + pll->reg_base + RK3399_PLLCON(3)); + + /* wait for the pll to lock */ + ret = rockchip_rk3399_pll_wait_lock(pll); + if (ret) { + pr_warn("%s: pll update unsucessful, trying to restore old params\n", + __func__); + rockchip_rk3399_pll_set_params(pll, &cur); + } + + if (rate_change_remuxed) + pll_mux_ops->set_parent(&pll_mux->hw, PLL_MODE_NORM); + + return ret; +} + +static int rockchip_rk3399_pll_set_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; + unsigned long old_rate = rockchip_rk3399_pll_recalc_rate(hw, prate); + + pr_debug("%s: changing %s from %lu to %lu with a parent rate of %lu\n", + __func__, __clk_get_name(hw->clk), old_rate, drate, prate); + + /* Get required rate settings from table */ + rate = rockchip_get_pll_settings(pll, drate); + if (!rate) { + pr_err("%s: Invalid rate : %lu for pll clk %s\n", __func__, + drate, __clk_get_name(hw->clk)); + return -EINVAL; + } + + return rockchip_rk3399_pll_set_params(pll, rate); +} + +static int rockchip_rk3399_pll_enable(struct clk_hw *hw) +{ + struct rockchip_clk_pll *pll = to_rockchip_clk_pll(hw); + + writel(HIWORD_UPDATE(0, RK3399_PLLCON3_PWRDOWN, 0), + pll->reg_base + RK3399_PLLCON(3)); + + return 0; +} + +static void rockchip_rk3399_pll_disable(struct clk_hw *hw) +{ + struct rockchip_clk_pll *pll = to_rockchip_clk_pll(hw); + + writel(HIWORD_UPDATE(RK3399_PLLCON3_PWRDOWN, + RK3399_PLLCON3_PWRDOWN, 0), + pll->reg_base + RK3399_PLLCON(3)); +} + +static int rockchip_rk3399_pll_is_enabled(struct clk_hw *hw) +{ + struct rockchip_clk_pll *pll = to_rockchip_clk_pll(hw); + u32 pllcon = readl(pll->reg_base + RK3399_PLLCON(3)); + + return !(pllcon & RK3399_PLLCON3_PWRDOWN); +} + +static void rockchip_rk3399_pll_init(struct clk_hw *hw) +{ + struct rockchip_clk_pll *pll = to_rockchip_clk_pll(hw); + const struct rockchip_pll_rate_table *rate; + struct rockchip_pll_rate_table cur; + unsigned long drate; + + if (!(pll->flags & ROCKCHIP_PLL_SYNC_RATE)) + return; + + drate = clk_hw_get_rate(hw); + rate = rockchip_get_pll_settings(pll, drate); + + /* when no rate setting for the current rate, rely on clk_set_rate */ + if (!rate) + return; + + rockchip_rk3399_pll_get_params(pll, &cur); + + pr_debug("%s: pll %s@%lu: Hz\n", __func__, __clk_get_name(hw->clk), + drate); + pr_debug("old - fbdiv: %d, postdiv1: %d, refdiv: %d, postdiv2: %d, dsmpd: %d, frac: %d\n", + cur.fbdiv, cur.postdiv1, cur.refdiv, cur.postdiv2, + cur.dsmpd, cur.frac); + pr_debug("new - fbdiv: %d, postdiv1: %d, refdiv: %d, postdiv2: %d, dsmpd: %d, frac: %d\n", + rate->fbdiv, rate->postdiv1, rate->refdiv, rate->postdiv2, + rate->dsmpd, rate->frac); + + if (rate->fbdiv != cur.fbdiv || rate->postdiv1 != cur.postdiv1 || + rate->refdiv != cur.refdiv || rate->postdiv2 != cur.postdiv2 || + rate->dsmpd != cur.dsmpd || rate->frac != cur.frac) { + struct clk *parent = clk_get_parent(hw->clk); + + if (!parent) { + pr_warn("%s: parent of %s not available\n", + __func__, __clk_get_name(hw->clk)); + return; + } + + pr_debug("%s: pll %s: rate params do not match rate table, adjusting\n", + __func__, __clk_get_name(hw->clk)); + rockchip_rk3399_pll_set_params(pll, rate); + } +} + +static const struct clk_ops rockchip_rk3399_pll_clk_norate_ops = { + .recalc_rate = rockchip_rk3399_pll_recalc_rate, + .enable = rockchip_rk3399_pll_enable, + .disable = rockchip_rk3399_pll_disable, + .is_enabled = rockchip_rk3399_pll_is_enabled, +}; + +static const struct clk_ops rockchip_rk3399_pll_clk_ops = { + .recalc_rate = rockchip_rk3399_pll_recalc_rate, + .round_rate = rockchip_pll_round_rate, + .set_rate = rockchip_rk3399_pll_set_rate, + .enable = rockchip_rk3399_pll_enable, + .disable = rockchip_rk3399_pll_disable, + .is_enabled = rockchip_rk3399_pll_is_enabled, + .init = rockchip_rk3399_pll_init, +}; + /* * Common registering of pll clocks */ @@ -634,7 +895,9 @@ struct clk *rockchip_clk_register_pll(struct rockchip_clk_provider *ctx, pll_mux->lock = &ctx->lock; pll_mux->hw.init = &init; - if (pll_type == pll_rk3036 || pll_type == pll_rk3066) + if (pll_type == pll_rk3036 || + pll_type == pll_rk3066 || + pll_type == pll_rk3399) pll_mux->flags |= CLK_MUX_HIWORD_MASK; /* the actual muxing is xin24m, pll-output, xin32k */ @@ -691,6 +954,12 @@ struct clk *rockchip_clk_register_pll(struct rockchip_clk_provider *ctx, else init.ops = &rockchip_rk3066_pll_clk_ops; break; + case pll_rk3399: + if (!pll->rate_table) + init.ops = &rockchip_rk3399_pll_clk_norate_ops; + else + init.ops = &rockchip_rk3399_pll_clk_ops; + break; default: pr_warn("%s: Unknown pll type for pll clk %s\n", __func__, name); diff --git a/drivers/clk/rockchip/clk.h b/drivers/clk/rockchip/clk.h index e243d50..4798786 100644 --- a/drivers/clk/rockchip/clk.h +++ b/drivers/clk/rockchip/clk.h @@ -96,6 +96,7 @@ struct clk; enum rockchip_pll_type { pll_rk3036, pll_rk3066, + pll_rk3399, }; #define RK3036_PLL_RATE(_rate, _refdiv, _fbdiv, _postdiv1, \ @@ -150,7 +151,7 @@ struct rockchip_pll_rate_table { unsigned int nf; unsigned int no; unsigned int nb; - /* for RK3036 */ + /* for RK3036/RK3399 */ unsigned int fbdiv; unsigned int postdiv1; unsigned int refdiv;