From patchwork Mon Feb 24 18:01:44 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Fabrice Gasnier X-Patchwork-Id: 13988687 Received: from mx08-00178001.pphosted.com (mx08-00178001.pphosted.com [91.207.212.93]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 8ACAB266580; Mon, 24 Feb 2025 18:14:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=91.207.212.93 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1740420866; cv=none; b=ehS6PnRMiBpzUqUqfu3Pw8JHJU481bJob8oRw8PSB2+PoIeaRJdtJgDXvlm3JMEz/qLG7I/Dg2qDqWyNH/UIWBT9zjGo2ZQOqdg92FK5+ITZgeQxJagCjqvT0GZoB+bLIFbhKo/Dvq3VO4zpzUMnQNbHkzqLTAeA/HrkF3scYCo= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1740420866; c=relaxed/simple; bh=eKH5ivKkQjWY8WZdJmAsdNjYqVAsxZIwbaov3TJpdJ0=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=hjtnkpfTAJObiucQVNyqxumvvhw7+OyJg+aYVuCz4m1vhiCl8iVR+bM+c2TBOmMjBHbUS59wLcxykTxgL9y+UXPxICi6wVSaWZMa1BWIg2bOjVqTaNZRODR5mx/j1s8PjdjTEKhrHiLUcmOYEpoTIbAjZP3icZ56DYOY8X4q3tc= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=foss.st.com; spf=pass smtp.mailfrom=foss.st.com; dkim=pass (2048-bit key) header.d=foss.st.com header.i=@foss.st.com header.b=8Yzg+y7U; arc=none smtp.client-ip=91.207.212.93 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=foss.st.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=foss.st.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=foss.st.com header.i=@foss.st.com header.b="8Yzg+y7U" Received: from pps.filterd (m0369457.ppops.net [127.0.0.1]) by mx07-00178001.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 51OHE4Y5028322; Mon, 24 Feb 2025 19:14:15 +0100 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=foss.st.com; h= cc:content-transfer-encoding:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to; s=selector1; bh= cs7t9yYlqzv4YN0HD7elj1semSKrTp6ZNSbNhngTkWU=; b=8Yzg+y7UWMflXClg obv1uTwhz+bq4xUET27pnNg+kvad923XGuYQna/LEey+LqdTk47GES+4UfOFrLwh sVzG2nLRMsOBY7Ew9A+gvHT0Uhj1nIs1YeoE7QDLvGWaf02hcFSHpIezRLcDMJ0a tfHh1Y+W5lJQtCwKVbx+OvIE8Mfe86BepLjf8TAMDvmOVmu1IXF2uHHs15Gaawc6 VRREwRQwJ8mjwUNu6R2x2DlS0uWtSQE+HuQiX6aYhc7NRYJAEgDcKCMfEGsFhHYQ KEpGPpc4BeZQSxYr+iTgpoxu4B/8GOKgFNEKUhVbz1f5SfvcXa33r6Hl91b+Eyz1 RkFx6Q== Received: from beta.dmz-ap.st.com (beta.dmz-ap.st.com [138.198.100.35]) by mx07-00178001.pphosted.com (PPS) with ESMTPS id 44ytdn68f4-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 24 Feb 2025 19:14:14 +0100 (CET) Received: from euls16034.sgp.st.com (euls16034.sgp.st.com [10.75.44.20]) by beta.dmz-ap.st.com (STMicroelectronics) with ESMTP id ED66B40079; Mon, 24 Feb 2025 19:12:29 +0100 (CET) Received: from Webmail-eu.st.com (eqndag1node6.st.com [10.75.129.135]) by euls16034.sgp.st.com (STMicroelectronics) with ESMTP id 8323B545158; Mon, 24 Feb 2025 19:02:31 +0100 (CET) Received: from SAFDAG1NODE1.st.com (10.75.90.17) by EQNDAG1NODE6.st.com (10.75.129.135) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.39; Mon, 24 Feb 2025 19:02:31 +0100 Received: from localhost (10.252.23.75) by SAFDAG1NODE1.st.com (10.75.90.17) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.39; Mon, 24 Feb 2025 19:02:31 +0100 From: Fabrice Gasnier To: , , , , , , , , , CC: , , , , , , , , , Subject: [PATCH 2/8] mfd: stm32-lptimer: add support for stm32mp25 Date: Mon, 24 Feb 2025 19:01:44 +0100 Message-ID: <20250224180150.3689638-3-fabrice.gasnier@foss.st.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20250224180150.3689638-1-fabrice.gasnier@foss.st.com> References: <20250224180150.3689638-1-fabrice.gasnier@foss.st.com> Precedence: bulk X-Mailing-List: linux-iio@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: SHFCAS1NODE2.st.com (10.75.129.73) To SAFDAG1NODE1.st.com (10.75.90.17) X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1057,Hydra:6.0.680,FMLib:17.12.68.34 definitions=2025-02-24_09,2025-02-24_02,2024-11-22_01 Add support for STM32MP25 SoC. Use newly introduced compatible, to handle new features along with registers and bits diversity. A new hardware configuration register (HWCFGR2) has been added, to gather number of capture/compare channels, autonomous mode and input capture capability. The full feature set is implemented in LPTIM1/2/3/4. LPTIM5 supports a smaller set of features. This can now be read from HWCFGR registers. Add new registers to the stm32-lptimer.h: CCMR1, CCR2 and HWCFGR1/2. Update the stm32_lptimer data struct so signal the number of capture/compare channels to the child devices. Also Remove some unused bit masks (CMPOK_ARROK / CMPOKCF_ARROKCF). Signed-off-by: Fabrice Gasnier --- drivers/mfd/stm32-lptimer.c | 30 ++++++++++++++++++++++++++++- include/linux/mfd/stm32-lptimer.h | 32 +++++++++++++++++++++++++++++-- 2 files changed, 59 insertions(+), 3 deletions(-) diff --git a/drivers/mfd/stm32-lptimer.c b/drivers/mfd/stm32-lptimer.c index b2704a9809c7..e5a9ceb78c10 100644 --- a/drivers/mfd/stm32-lptimer.c +++ b/drivers/mfd/stm32-lptimer.c @@ -6,6 +6,7 @@ * Inspired by Benjamin Gaignard's stm32-timers driver */ +#include #include #include #include @@ -49,6 +50,32 @@ static int stm32_lptimer_detect_encoder(struct stm32_lptimer *ddata) return 0; } +static int stm32_lptimer_detect_hwcfgr(struct stm32_lptimer *ddata) +{ + u32 val; + int ret; + + /* Try to guess parameters from HWCFGR: e.g. encodrer mode (STM32MP15) */ + ret = regmap_read(ddata->regmap, STM32MP15_LPTIM_HWCFGR, &val); + if (ret) + return ret; + + /* Fallback to legacy init if HWCFGR isn't present */ + if (!val) + return stm32_lptimer_detect_encoder(ddata); + + ddata->has_encoder = FIELD_GET(STM32MP15_LPTIM_HWCFGR_ENCODER, val); + + ret = regmap_read(ddata->regmap, STM32MP25_LPTIM_HWCFGR2, &val); + if (ret) + return ret; + + /* Number of capture/compare channels */ + ddata->num_cc_chans = FIELD_GET(STM32MP25_LPTIM_HWCFGR2_CHAN_NUM, val); + + return 0; +} + static int stm32_lptimer_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; @@ -73,7 +100,7 @@ static int stm32_lptimer_probe(struct platform_device *pdev) if (IS_ERR(ddata->clk)) return PTR_ERR(ddata->clk); - ret = stm32_lptimer_detect_encoder(ddata); + ret = stm32_lptimer_detect_hwcfgr(ddata); if (ret) return ret; @@ -84,6 +111,7 @@ static int stm32_lptimer_probe(struct platform_device *pdev) static const struct of_device_id stm32_lptimer_of_match[] = { { .compatible = "st,stm32-lptimer", }, + { .compatible = "st,stm32mp25-lptimer", }, {}, }; MODULE_DEVICE_TABLE(of, stm32_lptimer_of_match); diff --git a/include/linux/mfd/stm32-lptimer.h b/include/linux/mfd/stm32-lptimer.h index 06d3f11dc3c9..b9da7d0d2a36 100644 --- a/include/linux/mfd/stm32-lptimer.h +++ b/include/linux/mfd/stm32-lptimer.h @@ -17,18 +17,26 @@ #define STM32_LPTIM_IER 0x08 /* Interrupt Enable Reg */ #define STM32_LPTIM_CFGR 0x0C /* Configuration Reg */ #define STM32_LPTIM_CR 0x10 /* Control Reg */ -#define STM32_LPTIM_CMP 0x14 /* Compare Reg */ +#define STM32_LPTIM_CMP 0x14 /* Compare Reg (CCR1 on mp25) */ #define STM32_LPTIM_ARR 0x18 /* Autoreload Reg */ #define STM32_LPTIM_CNT 0x1C /* Counter Reg */ +#define STM32MP25_LPTIM_CCMR1 0x2C /* Capture/Compare Mode Reg */ +#define STM32MP25_LPTIM_CCR2 0x34 /* Compare Reg2 */ + +#define STM32MP25_LPTIM_HWCFGR2 0x3EC /* Hardware configuration register 2 */ +#define STM32MP15_LPTIM_HWCFGR 0x3F0 /* Hardware configuration register 1 */ +#define STM32MP15_LPTIM_VERR 0x3F4 /* Version identification register */ /* STM32_LPTIM_ISR - bit fields */ +#define STM32_LPTIM_CMP2_ARROK (BIT(19) | BIT(4)) #define STM32_LPTIM_CMPOK_ARROK GENMASK(4, 3) #define STM32_LPTIM_ARROK BIT(4) #define STM32_LPTIM_CMPOK BIT(3) /* STM32_LPTIM_ICR - bit fields */ -#define STM32_LPTIM_ARRMCF BIT(1) +#define STM32_LPTIM_CMP2OKCF_ARROKCF (BIT(19) | BIT(4)) #define STM32_LPTIM_CMPOKCF_ARROKCF GENMASK(4, 3) +#define STM32_LPTIM_ARRMCF BIT(1) /* STM32_LPTIM_IER - bit flieds */ #define STM32_LPTIM_ARRMIE BIT(1) @@ -53,16 +61,36 @@ /* STM32_LPTIM_ARR */ #define STM32_LPTIM_MAX_ARR 0xFFFF +/* STM32MP25_LPTIM_CCMR1 */ +#define STM32MP25_LPTIM_CC2P GENMASK(19, 18) +#define STM32MP25_LPTIM_CC2E BIT(17) +#define STM32MP25_LPTIM_CC2SEL BIT(16) +#define STM32MP25_LPTIM_CC1P GENMASK(3, 2) +#define STM32MP25_LPTIM_CC1E BIT(1) +#define STM32MP25_LPTIM_CC1SEL BIT(0) + +/* STM32MP15_LPTIM_HWCFGR */ +#define STM32MP15_LPTIM_HWCFGR_ENCODER BIT(16) + +/* STM32MP25_LPTIM_HWCFGR2 */ +#define STM32MP25_LPTIM_HWCFGR2_CHAN_NUM GENMASK(3, 0) + +/* STM32MP15_LPTIM_VERR */ +#define STM32MP15_MINREV_MASK GENMASK(3, 0) +#define STM32MP15_MAJREV_MASK GENMASK(7, 4) + /** * struct stm32_lptimer - STM32 Low-Power Timer data assigned by parent device * @clk: clock reference for this instance * @regmap: register map reference for this instance * @has_encoder: indicates this Low-Power Timer supports encoder mode + * @num_cc_chans: indicates the number of capture/compare channels */ struct stm32_lptimer { struct clk *clk; struct regmap *regmap; bool has_encoder; + unsigned int num_cc_chans; }; #endif