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At this stage, embed a member of type struct atmel_pwm_registers in it. Signed-off-by: Claudiu Beznea Acked-by: Uwe Kleine-König --- drivers/pwm/pwm-atmel.c | 64 +++++++++++++++++++++++++++---------------------- 1 file changed, 36 insertions(+), 28 deletions(-) diff --git a/drivers/pwm/pwm-atmel.c b/drivers/pwm/pwm-atmel.c index 530d7dc5f1b5..7e86a5266eb6 100644 --- a/drivers/pwm/pwm-atmel.c +++ b/drivers/pwm/pwm-atmel.c @@ -65,11 +65,15 @@ struct atmel_pwm_registers { u8 duty_upd; }; +struct atmel_pwm_data { + struct atmel_pwm_registers regs; +}; + struct atmel_pwm_chip { struct pwm_chip chip; struct clk *clk; void __iomem *base; - const struct atmel_pwm_registers *regs; + const struct atmel_pwm_data *data; unsigned int updated_pwms; /* ISR is cleared when read, ensure only one thread does that */ @@ -150,15 +154,15 @@ static void atmel_pwm_update_cdty(struct pwm_chip *chip, struct pwm_device *pwm, struct atmel_pwm_chip *atmel_pwm = to_atmel_pwm_chip(chip); u32 val; - if (atmel_pwm->regs->duty_upd == - atmel_pwm->regs->period_upd) { + if (atmel_pwm->data->regs.duty_upd == + atmel_pwm->data->regs.period_upd) { val = atmel_pwm_ch_readl(atmel_pwm, pwm->hwpwm, PWM_CMR); val &= ~PWM_CMR_UPD_CDTY; atmel_pwm_ch_writel(atmel_pwm, pwm->hwpwm, PWM_CMR, val); } atmel_pwm_ch_writel(atmel_pwm, pwm->hwpwm, - atmel_pwm->regs->duty_upd, cdty); + atmel_pwm->data->regs.duty_upd, cdty); } static void atmel_pwm_set_cprd_cdty(struct pwm_chip *chip, @@ -168,9 +172,9 @@ static void atmel_pwm_set_cprd_cdty(struct pwm_chip *chip, struct atmel_pwm_chip *atmel_pwm = to_atmel_pwm_chip(chip); atmel_pwm_ch_writel(atmel_pwm, pwm->hwpwm, - atmel_pwm->regs->duty, cdty); + atmel_pwm->data->regs.duty, cdty); atmel_pwm_ch_writel(atmel_pwm, pwm->hwpwm, - atmel_pwm->regs->period, cprd); + atmel_pwm->data->regs.period, cprd); } static void atmel_pwm_disable(struct pwm_chip *chip, struct pwm_device *pwm, @@ -225,7 +229,7 @@ static int atmel_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm, cstate.polarity == state->polarity && cstate.period == state->period) { cprd = atmel_pwm_ch_readl(atmel_pwm, pwm->hwpwm, - atmel_pwm->regs->period); + atmel_pwm->data->regs.period); atmel_pwm_calculate_cdty(state, cprd, &cdty); atmel_pwm_update_cdty(chip, pwm, cdty); return 0; @@ -277,27 +281,31 @@ static const struct pwm_ops atmel_pwm_ops = { .owner = THIS_MODULE, }; -static const struct atmel_pwm_registers atmel_pwm_regs_v1 = { - .period = PWMV1_CPRD, - .period_upd = PWMV1_CUPD, - .duty = PWMV1_CDTY, - .duty_upd = PWMV1_CUPD, +static const struct atmel_pwm_data atmel_pwm_data_v1 = { + .regs = { + .period = PWMV1_CPRD, + .period_upd = PWMV1_CUPD, + .duty = PWMV1_CDTY, + .duty_upd = PWMV1_CUPD, + }, }; -static const struct atmel_pwm_registers atmel_pwm_regs_v2 = { - .period = PWMV2_CPRD, - .period_upd = PWMV2_CPRDUPD, - .duty = PWMV2_CDTY, - .duty_upd = PWMV2_CDTYUPD, +static const struct atmel_pwm_data atmel_pwm_data_v2 = { + .regs = { + .period = PWMV2_CPRD, + .period_upd = PWMV2_CPRDUPD, + .duty = PWMV2_CDTY, + .duty_upd = PWMV2_CDTYUPD, + }, }; static const struct platform_device_id atmel_pwm_devtypes[] = { { .name = "at91sam9rl-pwm", - .driver_data = (kernel_ulong_t)&atmel_pwm_regs_v1, + .driver_data = (kernel_ulong_t)&atmel_pwm_data_v1, }, { .name = "sama5d3-pwm", - .driver_data = (kernel_ulong_t)&atmel_pwm_regs_v2, + .driver_data = (kernel_ulong_t)&atmel_pwm_data_v2, }, { /* sentinel */ }, @@ -307,20 +315,20 @@ MODULE_DEVICE_TABLE(platform, atmel_pwm_devtypes); static const struct of_device_id atmel_pwm_dt_ids[] = { { .compatible = "atmel,at91sam9rl-pwm", - .data = &atmel_pwm_regs_v1, + .data = &atmel_pwm_data_v1, }, { .compatible = "atmel,sama5d3-pwm", - .data = &atmel_pwm_regs_v2, + .data = &atmel_pwm_data_v2, }, { .compatible = "atmel,sama5d2-pwm", - .data = &atmel_pwm_regs_v2, + .data = &atmel_pwm_data_v2, }, { /* sentinel */ }, }; MODULE_DEVICE_TABLE(of, atmel_pwm_dt_ids); -static inline const struct atmel_pwm_registers * +static inline const struct atmel_pwm_data * atmel_pwm_get_driver_data(struct platform_device *pdev) { const struct platform_device_id *id; @@ -330,18 +338,18 @@ atmel_pwm_get_driver_data(struct platform_device *pdev) id = platform_get_device_id(pdev); - return (struct atmel_pwm_registers *)id->driver_data; + return (struct atmel_pwm_data *)id->driver_data; } static int atmel_pwm_probe(struct platform_device *pdev) { - const struct atmel_pwm_registers *regs; + const struct atmel_pwm_data *data; struct atmel_pwm_chip *atmel_pwm; struct resource *res; int ret; - regs = atmel_pwm_get_driver_data(pdev); - if (!regs) + data = atmel_pwm_get_driver_data(pdev); + if (!data) return -ENODEV; atmel_pwm = devm_kzalloc(&pdev->dev, sizeof(*atmel_pwm), GFP_KERNEL); @@ -373,7 +381,7 @@ static int atmel_pwm_probe(struct platform_device *pdev) atmel_pwm->chip.base = -1; atmel_pwm->chip.npwm = 4; - atmel_pwm->regs = regs; + atmel_pwm->data = data; atmel_pwm->updated_pwms = 0; mutex_init(&atmel_pwm->isr_lock); From patchwork Tue Feb 19 10:08:57 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Claudiu Beznea X-Patchwork-Id: 1044590 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=linux-pwm-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; 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SFS:(10009020)(376002)(136003)(39860400002)(366004)(396003)(346002)(199004)(189003)(6486002)(53936002)(446003)(11346002)(2616005)(26005)(486006)(97736004)(4326008)(76176011)(14454004)(6436002)(186003)(25786009)(2501003)(6116002)(99286004)(6506007)(476003)(102836004)(386003)(3846002)(6512007)(52116002)(107886003)(5660300002)(71200400001)(71190400001)(305945005)(8676002)(81166006)(81156014)(36756003)(7736002)(66066001)(8936002)(106356001)(478600001)(110136005)(50226002)(54906003)(2906002)(256004)(68736007)(6636002)(105586002)(72206003)(86362001)(316002); DIR:OUT; SFP:1101; SCL:1; SRVR:CY4PR11MB1831; H:CY4PR11MB1909.namprd11.prod.outlook.com; FPR:; SPF:None; LANG:en; PTR:InfoNoRecords; A:1; MX:1; received-spf: None (protection.outlook.com: microchip.com does not designate permitted sender hosts) x-ms-exchange-senderadcheck: 1 x-microsoft-antispam-message-info: aH3+9ltN9D5wo/jFWq4tvOyVpU9KA1q09WwEt2Q7hn03rxsZGzEEWFikHRPZCmoYMTgnnHmb23Ep08WMtPDrI1x35X8u+Ungrh8NLptVlTck/MNyylDrdWQMZVr23G2gqAl6qTW8mLcNtNSp2CSqFKFanuSGUXPaHEhY1Eci9a34iaXQoCrqfvAqhgrgdIMxG3TIk9DfQXrjXxCK9m8GYtimTEEARePPwuATq4WJL25n7/xCn4C9hjrXZKd6Seh0wSVvXGfRkFbH5+11LYoPFSfAdCHJNZLZ6mS/gPUHBoShvXNlWSJ7kATmkF8AuLLgrHF9J7eIwKQZrXf7UI1y6zYL8GfUjnELmpq3l+pJKL5OeNG9UKvCCTTsX/REQj/JzKRlKlFU/uKnCAj3lKJ8UgyR3cUfaUz3DcwkvKWuhdg= MIME-Version: 1.0 X-MS-Exchange-CrossTenant-Network-Message-Id: 04f00035-2f1d-4df9-d921-08d696524297 X-MS-Exchange-CrossTenant-originalarrivaltime: 19 Feb 2019 10:08:54.2054 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-id: 3f4057f3-b418-4d4e-ba84-d55b4e897d88 X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY4PR11MB1831 X-OriginatorOrg: microchip.com Sender: linux-pwm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pwm@vger.kernel.org From: Claudiu Beznea New SAM9X60's PWM controller use 32 bits counters thus it could generate signals with higher period and duty cycles than the old ones. Prepare the current driver to be able to work with old controllers (that uses 16 bits counters) and with the new SAM9X60's controller, by providing counters information based on compatible. Signed-off-by: Claudiu Beznea --- drivers/pwm/pwm-atmel.c | 34 +++++++++++++++++++++++----------- 1 file changed, 23 insertions(+), 11 deletions(-) diff --git a/drivers/pwm/pwm-atmel.c b/drivers/pwm/pwm-atmel.c index 7e86a5266eb6..647d063562db 100644 --- a/drivers/pwm/pwm-atmel.c +++ b/drivers/pwm/pwm-atmel.c @@ -48,15 +48,11 @@ #define PWMV2_CPRD 0x0C #define PWMV2_CPRDUPD 0x10 -/* - * Max value for duty and period - * - * Although the duty and period register is 32 bit, - * however only the LSB 16 bits are significant. - */ -#define PWM_MAX_DTY 0xFFFF -#define PWM_MAX_PRD 0xFFFF -#define PRD_MAX_PRES 10 +/* Max values for period and prescaler */ + +/* Only the LSB 16 bits are significant. */ +#define PWM_MAXV1_PRD 0xFFFF +#define PRD_MAXV1_PRES 10 struct atmel_pwm_registers { u8 period; @@ -65,8 +61,14 @@ struct atmel_pwm_registers { u8 duty_upd; }; +struct atmel_pwm_config { + u32 max_period; + u32 max_pres; +}; + struct atmel_pwm_data { struct atmel_pwm_registers regs; + struct atmel_pwm_config cfg; }; struct atmel_pwm_chip { @@ -125,10 +127,10 @@ static int atmel_pwm_calculate_cprd_and_pres(struct pwm_chip *chip, cycles *= clk_get_rate(atmel_pwm->clk); do_div(cycles, NSEC_PER_SEC); - for (*pres = 0; cycles > PWM_MAX_PRD; cycles >>= 1) + for (*pres = 0; cycles > atmel_pwm->data->cfg.max_period; cycles >>= 1) (*pres)++; - if (*pres > PRD_MAX_PRES) { + if (*pres > atmel_pwm->data->cfg.max_pres) { dev_err(chip->dev, "pres exceeds the maximum value\n"); return -EINVAL; } @@ -288,6 +290,11 @@ static const struct atmel_pwm_data atmel_pwm_data_v1 = { .duty = PWMV1_CDTY, .duty_upd = PWMV1_CUPD, }, + .cfg = { + /* 16 bits to keep period and duty. */ + .max_period = PWM_MAXV1_PRD, + .max_pres = PRD_MAXV1_PRES, + }, }; static const struct atmel_pwm_data atmel_pwm_data_v2 = { @@ -297,6 +304,11 @@ static const struct atmel_pwm_data atmel_pwm_data_v2 = { .duty = PWMV2_CDTY, .duty_upd = PWMV2_CDTYUPD, }, + .cfg = { + /* 16 bits to keep period and duty. */ + .max_period = PWM_MAXV1_PRD, + .max_pres = PRD_MAXV1_PRES, + }, }; static const struct platform_device_id atmel_pwm_devtypes[] = { From patchwork Tue Feb 19 10:09:00 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Claudiu Beznea X-Patchwork-Id: 1044586 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=linux-pwm-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=microchip.com Authentication-Results: ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=microchiptechnology.onmicrosoft.com header.i=@microchiptechnology.onmicrosoft.com header.b="kaNjq98K"; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 443bzz6rxYz9s7h for ; Tue, 19 Feb 2019 21:09:03 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728155AbfBSKJC (ORCPT ); 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Signed-off-by: Claudiu Beznea --- drivers/pwm/pwm-atmel.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/drivers/pwm/pwm-atmel.c b/drivers/pwm/pwm-atmel.c index 647d063562db..229cedb02770 100644 --- a/drivers/pwm/pwm-atmel.c +++ b/drivers/pwm/pwm-atmel.c @@ -52,6 +52,8 @@ /* Only the LSB 16 bits are significant. */ #define PWM_MAXV1_PRD 0xFFFF +/* All 32 bits are significant. */ +#define PWM_MAXV2_PRD 0xFFFFFFFF #define PRD_MAXV1_PRES 10 struct atmel_pwm_registers { @@ -311,6 +313,20 @@ static const struct atmel_pwm_data atmel_pwm_data_v2 = { }, }; +static const struct atmel_pwm_data atmel_pwm_data_v3 = { + .regs = { + .period = PWMV1_CPRD, + .period_upd = PWMV1_CUPD, + .duty = PWMV1_CDTY, + .duty_upd = PWMV1_CUPD, + }, + .cfg = { + /* 32 bits to keep period and duty. */ + .max_period = PWM_MAXV2_PRD, + .max_pres = PRD_MAXV1_PRES, + }, +}; + static const struct platform_device_id atmel_pwm_devtypes[] = { { .name = "at91sam9rl-pwm", @@ -335,6 +351,9 @@ static const struct of_device_id atmel_pwm_dt_ids[] = { .compatible = "atmel,sama5d2-pwm", .data = &atmel_pwm_data_v2, }, { + .compatible = "microchip,sam9x60-pwm", + .data = &atmel_pwm_data_v3, + }, { /* sentinel */ }, }; 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Signed-off-by: Claudiu Beznea Reviewed-by: Rob Herring --- Documentation/devicetree/bindings/pwm/atmel-pwm.txt | 1 + 1 file changed, 1 insertion(+) diff --git a/Documentation/devicetree/bindings/pwm/atmel-pwm.txt b/Documentation/devicetree/bindings/pwm/atmel-pwm.txt index c8c831d7b0d1..591ecdd39c7b 100644 --- a/Documentation/devicetree/bindings/pwm/atmel-pwm.txt +++ b/Documentation/devicetree/bindings/pwm/atmel-pwm.txt @@ -5,6 +5,7 @@ Required properties: - "atmel,at91sam9rl-pwm" - "atmel,sama5d3-pwm" - "atmel,sama5d2-pwm" + - "microchip,sam9x60-pwm" - reg: physical base address and length of the controller's registers - #pwm-cells: Should be 3. See pwm.txt in this directory for a description of the cells format.