From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 A4C94239072; Thu, 14 Aug 2025 15:46:28 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755186388; cv=none; b=mNUeyVwHjnbsmA+VmC25K/L7II3yJiLzuJhxA1MQlvhchhSl/wZ1k/MbY7MqTMDVDfEwjmz3AFVT8HNswxWBjfuK01LQNOoGFJlKDAqEs5Ns4745ROzCwY04GBQh+yjyxGcnt5wBImHxePaC45Sk7RvTf9z+STspm7HwuCC2gw8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755186388; c=relaxed/simple; bh=vgKNO9KMKM8wBYx2jsyzSgi+p35j799z+r40TDqKnfM=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=F0s5eeVzOZrm6DcENxyQ2m9cfb0UTqMrm1gaa67LoAbjkUs7qwFFXNPvkc7bWrAFF6w2GFVXJUSB06+2+Rj6UEAVe6J43MJvlGPFYi6kLgRZIQX/UWdDy7ORyvmkxXcIfWHIVXVoJN+OJnHb2Wg5bb4FIB0bY5j7lQdUBfzqolo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=jr50G62H; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="jr50G62H" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2BFB1C4CEEF; Thu, 14 Aug 2025 15:46:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1755186388; bh=vgKNO9KMKM8wBYx2jsyzSgi+p35j799z+r40TDqKnfM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=jr50G62H1Qx9CHSo0nMhM7RMBO9Uw6ApNxLok7rtAUSGkBwZ+JhCsnpYGVJRtHPvM NnLKi5V0XyhSxRWo1/MqhhHRggOgfi2HRkVxD0QR8f1W1zrGkcc/NBV25d4NHzjd2k MHiTlN8dc7WzXm81tD/nYXEIKVJbgq17C9rQ96Xc/+UwXheHmA+JQCrvZGGYW4QXI3 XLgjtECPozalHMeOGvLIIa+Y/GziVCIuEqS9I5iHEzObHll/blbvk6dD8bvcJPIjHI ibywTtkmMtz1bF4kGaRZwPZobJbetf6q9xhssw5zeSEpSgj9pEdXBeBY8zDDoQw6+a 2AkCgiRl2uHzA== Received: from sofa.misterjones.org ([185.219.108.64] helo=valley-girl.lan) by disco-boy.misterjones.org with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.95) (envelope-from ) id 1uma9p-007VqB-Qx; Thu, 14 Aug 2025 16:46:25 +0100 From: Marc Zyngier To: linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: Lorenzo Pieralisi , Hanjun Guo , Sudeep Holla , "Rafael J. Wysocki" , Daniel Lezcano , Thomas Gleixner , Mark Rutland , Alexandru Elisei , Steven Price Subject: [PATCH v2 1/4] ACPI: GTDT: Generate platform devices for MMIO timers Date: Thu, 14 Aug 2025 16:46:19 +0100 Message-Id: <20250814154622.10193-2-maz@kernel.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20250814154622.10193-1-maz@kernel.org> References: <20250814154622.10193-1-maz@kernel.org> Precedence: bulk X-Mailing-List: linux-acpi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-SA-Exim-Connect-IP: 185.219.108.64 X-SA-Exim-Rcpt-To: linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org, linux-arm-kernel@lists.infradead.org, lpieralisi@kernel.org, guohanjun@huawei.com, sudeep.holla@arm.com, rafael@kernel.org, daniel.lezcano@linaro.org, tglx@linutronix.de, mark.rutland@arm.com, alexandru.elisei@arm.com, steven.price@arm.com X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false In preparation for the MMIO timer support code becoming an actual driver, mimic what is done for the SBSA watchdog and expose a synthetic device for each MMIO timer block. Tested-by: Sudeep Holla Reviewed-by: Sudeep Holla Link: https://lore.kernel.org/r/20250807160243.1970533-2-maz@kernel.org Signed-off-by: Marc Zyngier --- drivers/acpi/arm64/gtdt.c | 29 +++++++++++++++++++++++++---- 1 file changed, 25 insertions(+), 4 deletions(-) diff --git a/drivers/acpi/arm64/gtdt.c b/drivers/acpi/arm64/gtdt.c index 70f8290b659de..fd995a1d3d248 100644 --- a/drivers/acpi/arm64/gtdt.c +++ b/drivers/acpi/arm64/gtdt.c @@ -388,11 +388,11 @@ static int __init gtdt_import_sbsa_gwdt(struct acpi_gtdt_watchdog *wd, return 0; } -static int __init gtdt_sbsa_gwdt_init(void) +static int __init gtdt_platform_timer_init(void) { void *platform_timer; struct acpi_table_header *table; - int ret, timer_count, gwdt_count = 0; + int ret, timer_count, gwdt_count = 0, mmio_timer_count = 0; if (acpi_disabled) return 0; @@ -414,20 +414,41 @@ static int __init gtdt_sbsa_gwdt_init(void) goto out_put_gtdt; for_each_platform_timer(platform_timer) { + ret = 0; + if (is_non_secure_watchdog(platform_timer)) { ret = gtdt_import_sbsa_gwdt(platform_timer, gwdt_count); if (ret) - break; + continue; gwdt_count++; + } else if (is_timer_block(platform_timer)) { + struct arch_timer_mem atm = {}; + struct platform_device *pdev; + + ret = gtdt_parse_timer_block(platform_timer, &atm); + if (ret) + continue; + + pdev = platform_device_register_data(NULL, "gtdt-arm-mmio-timer", + gwdt_count, &atm, + sizeof(atm)); + if (IS_ERR(pdev)) { + pr_err("Can't register timer %d\n", gwdt_count); + continue; + } + + mmio_timer_count++; } } if (gwdt_count) pr_info("found %d SBSA generic Watchdog(s).\n", gwdt_count); + if (mmio_timer_count) + pr_info("found %d Generic MMIO timer(s).\n", mmio_timer_count); out_put_gtdt: acpi_put_table(table); return ret; } -device_initcall(gtdt_sbsa_gwdt_init); +device_initcall(gtdt_platform_timer_init); -- 2.39.2