From patchwork Wed Jun 8 09:21:26 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lee Jones X-Patchwork-Id: 632074 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 3rPjmL6Rkxz9sxb for ; Wed, 8 Jun 2016 19:28:34 +1000 (AEST) Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (1024-bit key; unprotected) header.d=linaro.org header.i=@linaro.org header.b=Sju8gXyu; dkim-atps=neutral Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1423795AbcFHJ10 (ORCPT ); Wed, 8 Jun 2016 05:27:26 -0400 Received: from mail-wm0-f49.google.com ([74.125.82.49]:38647 "EHLO mail-wm0-f49.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1161953AbcFHJVh (ORCPT ); Wed, 8 Jun 2016 05:21:37 -0400 Received: by mail-wm0-f49.google.com with SMTP id m124so7683481wme.1 for ; Wed, 08 Jun 2016 02:21:36 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=IYZnEo/oPxSIkpYVALLF45UoBy8hjkZuhBfmuDADtvs=; b=Sju8gXyuqslc5sYN60rFJnWweUutnrnRLzs+5RNS6SzeiugsTmh1Sx+ixMaLWfj2Gu gvjB2Ui5VV4RPgvvXz6K7xytG5W93lOM5a0cOXxXft6YG1nxj1ElpcRp9fc9vYTnQLcg WehuqGCzRbg4DUU3+4fy0FZWP4TZD7pXsvNeU= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=IYZnEo/oPxSIkpYVALLF45UoBy8hjkZuhBfmuDADtvs=; b=WGJnsveqXkUpX1IH3FBbEQHm98RgZkpvNQ/vEhf5vTzNQi3GErzASQIpqMoTgI5jR5 rSlfx6gUireftJcUwlO994T3DbbSHwlVJVyUQpLdNRx+Fs65i8/pUPzoVZhtEJM9M9tn MfQ2JWpqLkgENSoXwm6PJViYg/meHDUs6BH0OxOEVkUDZBj+mh+6Y2/6VPtqetoWT2+n 2JlIINN83aFdca+oZ1KlAMK328fD6SxxytgGy9N8jAPacHgzbQvgLU0gC0u5VysSLCwo GidUrB0x5MII6xCYPMtku4S6zqw4IAJVXkA3zkPX818CN/s0KfQu3zLKaohAV9x+eZJa n9qw== X-Gm-Message-State: ALyK8tL2WQdokOrU2SZqynnMI2qhSOhnOVuW9F2aXN3gyOpQtjcbHdnmHZDABqQFnKD/ZPBB X-Received: by 10.194.235.4 with SMTP id ui4mr1316026wjc.23.1465377695736; Wed, 08 Jun 2016 02:21:35 -0700 (PDT) Received: from localhost.localdomain (host81-129-171-215.range81-129.btcentralplus.com. [81.129.171.215]) by smtp.gmail.com with ESMTPSA id g192sm23694494wme.15.2016.06.08.02.21.34 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 08 Jun 2016 02:21:35 -0700 (PDT) From: Lee Jones To: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Cc: kernel@stlinux.com, maxime.coquelin@st.com, patrice.chotard@st.com, thierry.reding@gmail.com, robh+dt@kernel.org, linux-pwm@vger.kernel.org, devicetree@vger.kernel.org, Lee Jones Subject: [PATCH v3 11/20] pwm: sti: Reorganise register names in preparation for new functionality Date: Wed, 8 Jun 2016 10:21:26 +0100 Message-Id: <20160608092135.21184-12-lee.jones@linaro.org> X-Mailer: git-send-email 2.8.3 In-Reply-To: <20160608092135.21184-1-lee.jones@linaro.org> References: <20160608092135.21184-1-lee.jones@linaro.org> Sender: linux-pwm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pwm@vger.kernel.org Exciting functionality is on the way to this device. But before we can add it, we need to do some basic housekeeping so the additions can be added cleanly. Signed-off-by: Lee Jones --- drivers/pwm/pwm-sti.c | 76 +++++++++++++++++++++++++++------------------------ 1 file changed, 41 insertions(+), 35 deletions(-) diff --git a/drivers/pwm/pwm-sti.c b/drivers/pwm/pwm-sti.c index 3dae127..5fbee61 100644 --- a/drivers/pwm/pwm-sti.c +++ b/drivers/pwm/pwm-sti.c @@ -21,18 +21,22 @@ #include #include -#define STI_DS_REG(ch) (4 * (ch)) /* Device's Duty Cycle register */ -#define STI_PWMCR 0x50 /* Control/Config register */ -#define STI_INTEN 0x54 /* Interrupt Enable/Disable register */ +#define PWM_OUT_VAL(x) (0x00 + (4 * (x))) /* Device's Duty Cycle register */ + +#define STI_PWM_CTRL 0x50 /* Control/Config register */ +#define STI_INT_EN 0x54 /* Interrupt Enable/Disable register */ #define PWM_PRESCALE_LOW_MASK 0x0f #define PWM_PRESCALE_HIGH_MASK 0xf0 /* Regfield IDs */ enum { + /* Bits in PWM_CTRL*/ PWMCLK_PRESCALE_LOW, PWMCLK_PRESCALE_HIGH, - PWM_EN, - PWM_INT_EN, + + PWM_OUT_EN, + + PWM_CPT_INT_EN, /* Keep last */ MAX_REGFIELDS @@ -47,14 +51,14 @@ struct sti_pwm_compat_data { struct sti_pwm_chip { struct device *dev; - struct clk *clk; unsigned long clk_rate; + struct clk *pwm_clk; struct regmap *regmap; struct sti_pwm_compat_data *cdata; struct regmap_field *prescale_low; struct regmap_field *prescale_high; - struct regmap_field *pwm_en; - struct regmap_field *pwm_int_en; + struct regmap_field *pwm_out_en; + struct regmap_field *pwm_cpt_int_en; struct pwm_chip chip; struct pwm_device *cur; unsigned long configured; @@ -64,10 +68,10 @@ struct sti_pwm_chip { }; static const struct reg_field sti_pwm_regfields[MAX_REGFIELDS] = { - [PWMCLK_PRESCALE_LOW] = REG_FIELD(STI_PWMCR, 0, 3), - [PWMCLK_PRESCALE_HIGH] = REG_FIELD(STI_PWMCR, 11, 14), - [PWM_EN] = REG_FIELD(STI_PWMCR, 9, 9), - [PWM_INT_EN] = REG_FIELD(STI_INTEN, 0, 0), + [PWMCLK_PRESCALE_LOW] = REG_FIELD(STI_PWM_CTRL, 0, 3), + [PWMCLK_PRESCALE_HIGH] = REG_FIELD(STI_PWM_CTRL, 11, 14), + [PWM_OUT_EN] = REG_FIELD(STI_PWM_CTRL, 9, 9), + [PWM_CPT_INT_EN] = REG_FIELD(STI_INT_EN, 1, 4), }; static inline struct sti_pwm_chip *to_sti_pwmchip(struct pwm_chip *chip) @@ -144,7 +148,7 @@ static int sti_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm, ((ncfg == 1) && (pwm->hwpwm != cur->hwpwm) && period_same) || ((ncfg > 1) && period_same)) { /* Enable clock before writing to PWM registers. */ - ret = clk_enable(pc->clk); + ret = clk_enable(pc->pwm_clk); if (ret) return ret; @@ -174,11 +178,12 @@ static int sti_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm, */ pwmvalx = cdata->max_pwm_cnt * duty_ns / period_ns; - ret = regmap_write(pc->regmap, STI_DS_REG(pwm->hwpwm), pwmvalx); + ret = regmap_write(pc->regmap, + PWM_OUT_VAL(pwm->hwpwm), pwmvalx); if (ret) goto clk_dis; - ret = regmap_field_write(pc->pwm_int_en, 0); + ret = regmap_field_write(pc->pwm_cpt_int_en, 0); set_bit(pwm->hwpwm, &pc->configured); pc->cur = pwm; @@ -190,7 +195,7 @@ static int sti_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm, } clk_dis: - clk_disable(pc->clk); + clk_disable(pc->pwm_clk); return ret; } @@ -206,11 +211,11 @@ static int sti_pwm_enable(struct pwm_chip *chip, struct pwm_device *pwm) */ mutex_lock(&pc->sti_pwm_lock); if (!pc->en_count) { - ret = clk_enable(pc->clk); + ret = clk_enable(pc->pwm_clk); if (ret) goto out; - ret = regmap_field_write(pc->pwm_en, 1); + ret = regmap_field_write(pc->pwm_out_en, 1); if (ret) { dev_err(dev, "failed to enable PWM device:%d\n", pwm->hwpwm); @@ -232,9 +237,9 @@ static void sti_pwm_disable(struct pwm_chip *chip, struct pwm_device *pwm) mutex_unlock(&pc->sti_pwm_lock); return; } - regmap_field_write(pc->pwm_en, 0); + regmap_field_write(pc->pwm_out_en, 0); - clk_disable(pc->clk); + clk_disable(pc->pwm_clk); mutex_unlock(&pc->sti_pwm_lock); } @@ -277,15 +282,16 @@ static int sti_pwm_probe_dt(struct sti_pwm_chip *pc) if (IS_ERR(pc->prescale_high)) return PTR_ERR(pc->prescale_high); - pc->pwm_en = devm_regmap_field_alloc(dev, pc->regmap, - reg_fields[PWM_EN]); - if (IS_ERR(pc->pwm_en)) - return PTR_ERR(pc->pwm_en); - pc->pwm_int_en = devm_regmap_field_alloc(dev, pc->regmap, - reg_fields[PWM_INT_EN]); - if (IS_ERR(pc->pwm_int_en)) - return PTR_ERR(pc->pwm_int_en); + pc->pwm_out_en = devm_regmap_field_alloc(dev, pc->regmap, + reg_fields[PWM_OUT_EN]); + if (IS_ERR(pc->pwm_out_en)) + return PTR_ERR(pc->pwm_out_en); + + pc->pwm_cpt_int_en = devm_regmap_field_alloc(dev, pc->regmap, + reg_fields[PWM_CPT_INT_EN]); + if (IS_ERR(pc->pwm_cpt_int_en)) + return PTR_ERR(pc->pwm_cpt_int_en); return 0; } @@ -341,19 +347,19 @@ static int sti_pwm_probe(struct platform_device *pdev) if (ret) return ret; - pc->clk = of_clk_get_by_name(dev->of_node, "pwm"); - if (IS_ERR(pc->clk)) { + pc->pwm_clk = of_clk_get_by_name(dev->of_node, "pwm"); + if (IS_ERR(pc->pwm_clk)) { dev_err(dev, "failed to get PWM clock\n"); - return PTR_ERR(pc->clk); + return PTR_ERR(pc->pwm_clk); } - pc->clk_rate = clk_get_rate(pc->clk); + pc->clk_rate = clk_get_rate(pc->pwm_clk); if (!pc->clk_rate) { dev_err(dev, "failed to get clock rate\n"); return -EINVAL; } - ret = clk_prepare(pc->clk); + ret = clk_prepare(pc->pwm_clk); if (ret) { dev_err(dev, "failed to prepare clock\n"); return ret; @@ -367,7 +373,7 @@ static int sti_pwm_probe(struct platform_device *pdev) ret = pwmchip_add(&pc->chip); if (ret < 0) { - clk_unprepare(pc->clk); + clk_unprepare(pc->pwm_clk); return ret; } @@ -384,7 +390,7 @@ static int sti_pwm_remove(struct platform_device *pdev) for (i = 0; i < pc->cdata->num_devs; i++) pwm_disable(&pc->chip.pwms[i]); - clk_unprepare(pc->clk); + clk_unprepare(pc->pwm_clk); return pwmchip_remove(&pc->chip); }