From patchwork Thu Feb 22 03:02:22 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sam Protsenko X-Patchwork-Id: 13566693 Received: from mail-oi1-f181.google.com (mail-oi1-f181.google.com [209.85.167.181]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B7E681642F for ; Thu, 22 Feb 2024 03:02:38 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.167.181 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708570961; cv=none; b=t+TbkRgFH9+C10KzbD7t3rdnTFpM6uokli9g3rhzQ6DPU5vDvQFGoBjVIjYO8Nev+QqNVzV4wzpviRRtOtvp8rRVpQjouPFyM/vfljdHGFRC3EEbQ/qHKSllrJS6jx1DUk8ZttKfbYJBq9SlM583afEDiJgtwBVYtkrWD1l21+g= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708570961; c=relaxed/simple; bh=uZG6rIezhXsyWplCJqZ7/urIXrrd+bul5maJ05GL/rU=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=XKvQ1v/6RUf40jPkSfbdbipujLbrivsFOdjitxU55d3I8qbLVpEqDDklpX+MNcgOkkNsX0EjNOzAIamK6Ap98qQqPB9MluzjQu+QMz2BDd9hiMwhOGCrJbaFc6rRHMkOudunldkQZUMOT2W3ZVV/C31eSsZPfcdlv/1L/fBEqUg= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linaro.org; spf=pass smtp.mailfrom=linaro.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b=KSkjnudl; arc=none smtp.client-ip=209.85.167.181 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linaro.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linaro.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="KSkjnudl" Received: by mail-oi1-f181.google.com with SMTP id 5614622812f47-3bbb4806f67so4936570b6e.3 for ; Wed, 21 Feb 2024 19:02:38 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1708570958; x=1709175758; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=h1pfBB+u8QXOb34PTpTkMpZc8xqCfgfeq0PGtHjjjvY=; b=KSkjnudlXr3NRs8r1l+qEM7fxY3aolriiy5q3kMcVchEGb8M7m7j06icfYzzhfLAd7 z56Xywq/4uF22/8pv72lyQIvppI9zkUANar0ozCa73wuNWdnpw9ncB+eN5LbWsZAVhe0 56HSVLwyuqYvgVWZdRsy9h/U6JlfpXtZOZ2bOUdmcM6uhn/0qS/vTPP9oGf4AU9t/LaN OGE7KcnPeSTNnF6HDoGNLO4lxhYB02tv1q770zzbaDiQHVLY12iG0MOOCCuw98/1yb75 prFo0vDdvwLsF8Grt4wFlSr68y2QmtijqSv7d+3EINC4O1Nwi5nMB4YtSltZsFZ3CyyV +HMg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1708570958; x=1709175758; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=h1pfBB+u8QXOb34PTpTkMpZc8xqCfgfeq0PGtHjjjvY=; b=fQDxXZJ6LD/OBkZx0MuU/CXFSDTr3wfK3EM/1uDJd0rcxrX4d5wacbyyLPfOwBEsYZ CTAICCU9lEdT7ARipx3qWoClIuryLJwLQyq1K7vtF6OOQpIctrR2EMrHawbR0toMt2Go OdnxbhqRi9LpcdTMpbxmGrjz1ZkYa1VDlqDq4r+nOUrBd7Objcp+ym8fev0yCjotmyp0 Nkha6nnS9/P+v5x5XxBxutGouGP92Zw7N3PWEfMv773ovuKmXYGsoeHcOj+znNQUe1zK MH39AO3U3s1hto21zQMp2S0eVycMnA/FSzDzBD3MMNww2oKP7mDx7gSHPLfc8XxXvwiq HRjg== X-Forwarded-Encrypted: i=1; AJvYcCV4c4afQVCukoh6A59iWTRcNf5SJp+T4SBcTByf2LVffUzBiOMpjzIIlAvsTQo/6A8tffAQSzK3vfoDO7OdnuszzmaQfQIuhhf7 X-Gm-Message-State: AOJu0YwNywiuvG8ys8EWd3k5jmuWlCgCFMZmS3VF0j9EQG+f+6PAWT0O p/ZJYoM+8KPFdnpNsSY80i8VnLNA4iiszF1OfGBt+rYToWKlMxut4AOTdU6dYr8= X-Google-Smtp-Source: AGHT+IFs7TI8/WNQwjC08imFX21rZ3Fe6t1Il+3aP48yWhxzOWcUVNG9WmsJflmZmKAh5mbvd2uhfQ== X-Received: by 2002:a05:6808:138f:b0:3c1:5515:2599 with SMTP id c15-20020a056808138f00b003c155152599mr14479119oiw.39.1708570957820; Wed, 21 Feb 2024 19:02:37 -0800 (PST) Received: from localhost ([136.62.192.75]) by smtp.gmail.com with ESMTPSA id ct24-20020a056808361800b003c045697003sm1810987oib.41.2024.02.21.19.02.37 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 21 Feb 2024 19:02:37 -0800 (PST) From: Sam Protsenko To: Krzysztof Kozlowski , Sylwester Nawrocki , Chanwoo Choi Cc: Alim Akhtar , Michael Turquette , Stephen Boyd , Rob Herring , Conor Dooley , Tomasz Figa , linux-samsung-soc@vger.kernel.org, linux-clk@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 02/15] clk: samsung: Improve clk-cpu.c style Date: Wed, 21 Feb 2024 21:02:22 -0600 Message-Id: <20240222030235.27815-3-semen.protsenko@linaro.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240222030235.27815-1-semen.protsenko@linaro.org> References: <20240222030235.27815-1-semen.protsenko@linaro.org> Precedence: bulk X-Mailing-List: linux-clk@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 clk-cpu.c has numerous style issues reported by checkpatch and easily identified otherwise. Give it some love and fix those warnings where it makes sense. Also make stabilization time a named constant to get rid of the magic number in clk-cpu.c. No functional change. Signed-off-by: Sam Protsenko --- Changes in v2: - none drivers/clk/samsung/clk-cpu.c | 65 ++++++++++++++++++----------------- 1 file changed, 33 insertions(+), 32 deletions(-) diff --git a/drivers/clk/samsung/clk-cpu.c b/drivers/clk/samsung/clk-cpu.c index 3e62ade120c5..e02730776aaa 100644 --- a/drivers/clk/samsung/clk-cpu.c +++ b/drivers/clk/samsung/clk-cpu.c @@ -16,18 +16,18 @@ * of the SoC or supplied after the SoC characterization. * * The below implementation of the CPU clock allows the rate changes of the CPU - * clock and the corresponding rate changes of the auxillary clocks of the CPU + * clock and the corresponding rate changes of the auxiliary clocks of the CPU * domain. The platform clock driver provides a clock register configuration * for each configurable rate which is then used to program the clock hardware - * registers to acheive a fast co-oridinated rate change for all the CPU domain + * registers to achieve a fast coordinated rate change for all the CPU domain * clocks. * * On a rate change request for the CPU clock, the rate change is propagated - * upto the PLL supplying the clock to the CPU domain clock blocks. While the + * up to the PLL supplying the clock to the CPU domain clock blocks. While the * CPU domain PLL is reconfigured, the CPU domain clocks are driven using an * alternate clock source. If required, the alternate clock source is divided * down in order to keep the output clock rate within the previous OPP limits. -*/ + */ #include #include @@ -50,17 +50,19 @@ #define E5433_DIV_STAT_CPU0 0x500 #define E5433_DIV_STAT_CPU1 0x504 -#define E4210_DIV0_RATIO0_MASK 0x7 -#define E4210_DIV1_HPM_MASK (0x7 << 4) -#define E4210_DIV1_COPY_MASK (0x7 << 0) -#define E4210_MUX_HPM_MASK (1 << 20) +#define E4210_DIV0_RATIO0_MASK GENMASK(2, 0) +#define E4210_DIV1_HPM_MASK GENMASK(6, 4) +#define E4210_DIV1_COPY_MASK GENMASK(2, 0) +#define E4210_MUX_HPM_MASK BIT(20) #define E4210_DIV0_ATB_SHIFT 16 #define E4210_DIV0_ATB_MASK (DIV_MASK << E4210_DIV0_ATB_SHIFT) +/* Divider stabilization time, msec */ +#define MAX_STAB_TIME 10 #define MAX_DIV 8 -#define DIV_MASK 7 -#define DIV_MASK_ALL 0xffffffff -#define MUX_MASK 7 +#define DIV_MASK GENMASK(2, 0) +#define DIV_MASK_ALL GENMASK(31, 0) +#define MUX_MASK GENMASK(2, 0) /* * Helper function to wait until divider(s) have stabilized after the divider @@ -68,7 +70,7 @@ */ static void wait_until_divider_stable(void __iomem *div_reg, unsigned long mask) { - unsigned long timeout = jiffies + msecs_to_jiffies(10); + unsigned long timeout = jiffies + msecs_to_jiffies(MAX_STAB_TIME); do { if (!(readl(div_reg) & mask)) @@ -86,9 +88,9 @@ static void wait_until_divider_stable(void __iomem *div_reg, unsigned long mask) * value was changed. */ static void wait_until_mux_stable(void __iomem *mux_reg, u32 mux_pos, - unsigned long mux_value) + unsigned long mux_value) { - unsigned long timeout = jiffies + msecs_to_jiffies(10); + unsigned long timeout = jiffies + msecs_to_jiffies(MAX_STAB_TIME); do { if (((readl(mux_reg) >> mux_pos) & MUX_MASK) == mux_value) @@ -101,18 +103,18 @@ static void wait_until_mux_stable(void __iomem *mux_reg, u32 mux_pos, pr_err("%s: re-parenting mux timed-out\n", __func__); } -/* common round rate callback useable for all types of CPU clocks */ -static long exynos_cpuclk_round_rate(struct clk_hw *hw, - unsigned long drate, unsigned long *prate) +/* common round rate callback usable for all types of CPU clocks */ +static long exynos_cpuclk_round_rate(struct clk_hw *hw, unsigned long drate, + unsigned long *prate) { struct clk_hw *parent = clk_hw_get_parent(hw); *prate = clk_hw_round_rate(parent, drate); return *prate; } -/* common recalc rate callback useable for all types of CPU clocks */ +/* common recalc rate callback usable for all types of CPU clocks */ static unsigned long exynos_cpuclk_recalc_rate(struct clk_hw *hw, - unsigned long parent_rate) + unsigned long parent_rate) { /* * The CPU clock output (armclk) rate is the same as its parent @@ -135,7 +137,7 @@ static const struct clk_ops exynos_cpuclk_clk_ops = { * dividers to be programmed. */ static void exynos_set_safe_div(void __iomem *base, unsigned long div, - unsigned long mask) + unsigned long mask) { unsigned long div0; @@ -151,7 +153,6 @@ static int exynos_cpuclk_pre_rate_change(struct clk_notifier_data *ndata, { const struct exynos_cpuclk_cfg_data *cfg_data = cpuclk->cfg; unsigned long alt_prate = clk_hw_get_rate(cpuclk->alt_parent); - unsigned long alt_div = 0, alt_div_mask = DIV_MASK; unsigned long div0, div1 = 0, mux_reg; unsigned long flags; @@ -187,6 +188,7 @@ static int exynos_cpuclk_pre_rate_change(struct clk_notifier_data *ndata, */ if (alt_prate > ndata->old_rate || ndata->old_rate > ndata->new_rate) { unsigned long tmp_rate = min(ndata->old_rate, ndata->new_rate); + unsigned long alt_div, alt_div_mask = DIV_MASK; alt_div = DIV_ROUND_UP(alt_prate, tmp_rate) - 1; WARN_ON(alt_div >= MAX_DIV); @@ -215,7 +217,7 @@ static int exynos_cpuclk_pre_rate_change(struct clk_notifier_data *ndata, if (cpuclk->flags & CLK_CPU_HAS_DIV1) { writel(div1, base + E4210_DIV_CPU1); wait_until_divider_stable(base + E4210_DIV_STAT_CPU1, - DIV_MASK_ALL); + DIV_MASK_ALL); } spin_unlock_irqrestore(cpuclk->lock, flags); @@ -263,7 +265,7 @@ static int exynos_cpuclk_post_rate_change(struct clk_notifier_data *ndata, * dividers to be programmed. */ static void exynos5433_set_safe_div(void __iomem *base, unsigned long div, - unsigned long mask) + unsigned long mask) { unsigned long div0; @@ -279,7 +281,6 @@ static int exynos5433_cpuclk_pre_rate_change(struct clk_notifier_data *ndata, { const struct exynos_cpuclk_cfg_data *cfg_data = cpuclk->cfg; unsigned long alt_prate = clk_hw_get_rate(cpuclk->alt_parent); - unsigned long alt_div = 0, alt_div_mask = DIV_MASK; unsigned long div0, div1 = 0, mux_reg; unsigned long flags; @@ -309,6 +310,7 @@ static int exynos5433_cpuclk_pre_rate_change(struct clk_notifier_data *ndata, */ if (alt_prate > ndata->old_rate || ndata->old_rate > ndata->new_rate) { unsigned long tmp_rate = min(ndata->old_rate, ndata->new_rate); + unsigned long alt_div, alt_div_mask = DIV_MASK; alt_div = DIV_ROUND_UP(alt_prate, tmp_rate) - 1; WARN_ON(alt_div >= MAX_DIV); @@ -358,7 +360,7 @@ static int exynos5433_cpuclk_post_rate_change(struct clk_notifier_data *ndata, * notifications of the parent clock of cpuclk. */ static int exynos_cpuclk_notifier_cb(struct notifier_block *nb, - unsigned long event, void *data) + unsigned long event, void *data) { struct clk_notifier_data *ndata = data; struct exynos_cpuclk *cpuclk; @@ -381,7 +383,7 @@ static int exynos_cpuclk_notifier_cb(struct notifier_block *nb, * notifications of the parent clock of cpuclk. */ static int exynos5433_cpuclk_notifier_cb(struct notifier_block *nb, - unsigned long event, void *data) + unsigned long event, void *data) { struct clk_notifier_data *ndata = data; struct exynos_cpuclk *cpuclk; @@ -438,11 +440,10 @@ static int __init exynos_register_cpu_clock(struct samsung_clk_provider *ctx, else cpuclk->clk_nb.notifier_call = exynos_cpuclk_notifier_cb; - ret = clk_notifier_register(parent->clk, &cpuclk->clk_nb); if (ret) { pr_err("%s: failed to register clock notifier for %s\n", - __func__, name); + __func__, name); goto free_cpuclk; } @@ -454,7 +455,7 @@ static int __init exynos_register_cpu_clock(struct samsung_clk_provider *ctx, ret = clk_hw_register(NULL, &cpuclk->hw); if (ret) { - pr_err("%s: could not register cpuclk %s\n", __func__, name); + pr_err("%s: could not register cpuclk %s\n", __func__, name); goto free_cpuclk_data; } @@ -482,8 +483,8 @@ void __init samsung_clk_register_cpu(struct samsung_clk_provider *ctx, for (num_cfgs = 0; list->cfg[num_cfgs].prate != 0; ) num_cfgs++; - exynos_register_cpu_clock(ctx, list->id, list->name, hws[list->parent_id], - hws[list->alt_parent_id], list->offset, list->cfg, num_cfgs, - list->flags); + exynos_register_cpu_clock(ctx, list->id, list->name, + hws[list->parent_id], hws[list->alt_parent_id], + list->offset, list->cfg, num_cfgs, list->flags); } }