From patchwork Fri Jul 5 11:13:26 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yang Li via B4 Relay X-Patchwork-Id: 811147 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 B94451442FD; Fri, 5 Jul 2024 11:13:28 +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=1720178008; cv=none; b=PzLl3HJ2v34+FPv5QJjunbG/Qx4p1N/whswUoz12ND1V2DJnLyIRuTDWpBnDWz1jS/kXexjrr0lOzLjURZbzy4c9F6tcm5f3lD/e6wN/SsvJjgoYKm5u/3K7fW+mYPlB1qQSYhd8d4PhJVlBD8l956l6oZvrspaK/QveZWsPYUc= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1720178008; c=relaxed/simple; bh=gM9KnxmaYBefs+3c9rtIvUowsz/8HqevZUOFQO1FdSA=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=Av03qKCOnJJfMeyZdMaWhDOxfKp13/0dF/jWglJ/bV6czJwqlon/CY07DsPpFN3E5+NRMqwWxq2rdnOQnubbUHoJ3Q18CQKwgKHdvOayPwmClNmulGwhvxFkUQp+a9AXR10mtlfIx36a0tuS+OlQ8Izs42/jeOoJqlp4mA83sOw= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=ndAmxVER; 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="ndAmxVER" Received: by smtp.kernel.org (Postfix) with ESMTPS id 69BF0C32781; Fri, 5 Jul 2024 11:13:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1720178008; bh=gM9KnxmaYBefs+3c9rtIvUowsz/8HqevZUOFQO1FdSA=; h=From:Date:Subject:References:In-Reply-To:To:Cc:Reply-To:From; b=ndAmxVEROAcSdGban1ehA+SH9UdFlPywpCZC7HNnNI+omD+1GY75vw5zHd6bWlWNG n5DI0vHSi8/Bdkulw9h30GzOm6pdFc5drrprMrzopG+jlRkavupvzmo8EeSDt0v/Jf Awtq4sNCl8ogOumAdog6KTRcFE+WeknLoheugzK47HmLJjGvOHyvWze7P7P41TcShF OdXMyRxmzPHno0pPzuIKn44+PzaAtNM6mohur1nLFStB4AcyXXJgszJL+H39DSx/+e cl8u11F9wcQHdBAdah2LZjIAHz11MKSgiXhhL9ox1dbruAAeGl/xaW61dkhMNhQQhu Cwl2CDIoxV0DA== Received: from aws-us-west-2-korg-lkml-1.web.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5B308C3DA40; Fri, 5 Jul 2024 11:13:28 +0000 (UTC) From: Yang Li via B4 Relay Date: Fri, 05 Jul 2024 19:13:26 +0800 Subject: [PATCH 2/3] power: sequenceing: Add power sequence for Amlogic WCN chips Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20240705-pwrseq-v1-2-31829b47fc72@amlogic.com> References: <20240705-pwrseq-v1-0-31829b47fc72@amlogic.com> In-Reply-To: <20240705-pwrseq-v1-0-31829b47fc72@amlogic.com> To: Rob Herring , Krzysztof Kozlowski , Conor Dooley , Bartosz Golaszewski Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, Yang Li X-Mailer: b4 0.13-dev-f0463 X-Developer-Signature: v=1; a=ed25519-sha256; t=1720178006; l=7619; i=yang.li@amlogic.com; s=20240418; h=from:subject:message-id; bh=fusHaIg3W/yshsJI12RRwPi4r8wzlUyT/DZ/71Atthg=; b=xBFSKEUkFyv9tbViHER0T6AOEI4XaVkjkqWO2D12mt/jg7tb0QjU9O/QHyCxsOQyHQxI1YX+4 xO/9OUBHwAqB4vh6/Dr88KdbovrFS/D30t5Z4bbdzfvf6uHE7zYNRih X-Developer-Key: i=yang.li@amlogic.com; a=ed25519; pk=86OaNWMr3XECW9HGNhkJ4HdR2eYA5SEAegQ3td2UCCs= X-Endpoint-Received: by B4 Relay for yang.li@amlogic.com/20240418 with auth_id=180 X-Original-From: Yang Li Reply-To: yang.li@amlogic.com From: Yang Li Add power sequence for Bluetooth and Wi-Fi respectively, including chip_en pull-up and bt_en pull-up, and generation of the 32.768 clock. Signed-off-by: Yang Li --- drivers/power/sequencing/Kconfig | 7 + drivers/power/sequencing/Makefile | 1 + drivers/power/sequencing/pwrseq-aml-wcn.c | 209 ++++++++++++++++++++++++++++++ 3 files changed, 217 insertions(+) diff --git a/drivers/power/sequencing/Kconfig b/drivers/power/sequencing/Kconfig index c9f1cdb66524..65d3b2c20bfb 100644 --- a/drivers/power/sequencing/Kconfig +++ b/drivers/power/sequencing/Kconfig @@ -26,4 +26,11 @@ config POWER_SEQUENCING_QCOM_WCN this driver is needed for correct power control or else we'd risk not respecting the required delays between enabling Bluetooth and WLAN. +config POWER_SEQUENCING_AML_WCN + tristate "Amlogic WCN family PMU driver" + default m if ARCH_MESON + help + Say Y here to enable the power sequencing driver for Amlogic + WCN Bluetooth/WLAN chipsets. + endif diff --git a/drivers/power/sequencing/Makefile b/drivers/power/sequencing/Makefile index 2eec2df7912d..32706daf8f0f 100644 --- a/drivers/power/sequencing/Makefile +++ b/drivers/power/sequencing/Makefile @@ -4,3 +4,4 @@ obj-$(CONFIG_POWER_SEQUENCING) += pwrseq-core.o pwrseq-core-y := core.o obj-$(CONFIG_POWER_SEQUENCING_QCOM_WCN) += pwrseq-qcom-wcn.o +obj-$(CONFIG_POWER_SEQUENCING_AML_WCN) += pwrseq-aml-wcn.o diff --git a/drivers/power/sequencing/pwrseq-aml-wcn.c b/drivers/power/sequencing/pwrseq-aml-wcn.c new file mode 100644 index 000000000000..6f5bfcf60b9c --- /dev/null +++ b/drivers/power/sequencing/pwrseq-aml-wcn.c @@ -0,0 +1,209 @@ +// SPDX-License-Identifier: (GPL-2.0-only OR MIT) +/* + * Copyright (C) 2024 Amlogic, Inc. All rights reserved + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +struct pwrseq_aml_wcn_ctx { + struct pwrseq_device *pwrseq; + int bt_enable_gpio; + int chip_enable_gpio; + struct clk *lpo_clk; + unsigned int pwr_count; +}; + +static DEFINE_MUTEX(pwrseq_lock); + +static int pwrseq_aml_wcn_chip_enable(struct pwrseq_device *pwrseq) +{ + struct pwrseq_aml_wcn_ctx *ctx = pwrseq_device_get_drvdata(pwrseq); + int err; + + mutex_lock(&pwrseq_lock); + if (ctx->pwr_count == 0) { + gpio_request(ctx->chip_enable_gpio, "chip-enable-gpios"); + gpio_direction_output(ctx->chip_enable_gpio, 1); + gpio_free(ctx->chip_enable_gpio); + + if (!IS_ERR(ctx->lpo_clk)) { + err = clk_prepare_enable(ctx->lpo_clk); + if (err) { + mutex_unlock(&pwrseq_lock); + return err; + } + } + } + + ctx->pwr_count++; + mutex_unlock(&pwrseq_lock); + return 0; +} + +static int pwrseq_aml_wcn_chip_disable(struct pwrseq_device *pwrseq) +{ + struct pwrseq_aml_wcn_ctx *ctx = pwrseq_device_get_drvdata(pwrseq); + + mutex_lock(&pwrseq_lock); + if (--ctx->pwr_count == 0) { + gpio_request(ctx->chip_enable_gpio, "chip-enable-gpios"); + gpio_direction_output(ctx->chip_enable_gpio, 0); + gpio_free(ctx->chip_enable_gpio); + + if (!IS_ERR(ctx->lpo_clk)) + clk_disable_unprepare(ctx->lpo_clk); + } + + mutex_unlock(&pwrseq_lock); + return 0; +} + +static const struct pwrseq_unit_data pwrseq_aml_wcn_chip_power_unit_data = { + .name = "chip-enable", + .enable = pwrseq_aml_wcn_chip_enable, + .disable = pwrseq_aml_wcn_chip_disable, +}; + +static const struct pwrseq_unit_data *pwrseq_aml_wcn_unit_deps[] = { + &pwrseq_aml_wcn_chip_power_unit_data, + NULL +}; + +static int pwrseq_aml_wcn_bt_enable(struct pwrseq_device *pwrseq) +{ + struct pwrseq_aml_wcn_ctx *ctx = pwrseq_device_get_drvdata(pwrseq); + + gpio_request(ctx->bt_enable_gpio, "bt-enable-gpios"); + gpio_direction_output(ctx->bt_enable_gpio, 1); + gpio_free(ctx->bt_enable_gpio); + + /* wait 100ms for bluetooth controller power on */ + msleep(100); + + return 0; +} + +static int pwrseq_aml_wcn_bt_disable(struct pwrseq_device *pwrseq) +{ + struct pwrseq_aml_wcn_ctx *ctx = pwrseq_device_get_drvdata(pwrseq); + + gpio_request(ctx->bt_enable_gpio, "bt-enable-gpios"); + gpio_direction_output(ctx->bt_enable_gpio, 0); + gpio_free(ctx->bt_enable_gpio); + + return 0; +} + +static const struct pwrseq_unit_data pwrseq_aml_wcn_bt_unit_data = { + .name = "bluetooth-enable", + .deps = pwrseq_aml_wcn_unit_deps, + .enable = pwrseq_aml_wcn_bt_enable, + .disable = pwrseq_aml_wcn_bt_disable, +}; + +static const struct pwrseq_unit_data pwrseq_aml_wcn_wlan_unit_data = { + .name = "wlan-enable", + .deps = pwrseq_aml_wcn_unit_deps, +}; + +static const struct pwrseq_target_data pwrseq_aml_wcn_bt_target_data = { + .name = "bluetooth", + .unit = &pwrseq_aml_wcn_bt_unit_data, +}; + +static const struct pwrseq_target_data pwrseq_aml_wcn_wlan_target_data = { + .name = "wlan", + .unit = &pwrseq_aml_wcn_wlan_unit_data, +}; + +static const struct pwrseq_target_data *pwrseq_aml_wcn_targets[] = { + &pwrseq_aml_wcn_bt_target_data, + &pwrseq_aml_wcn_wlan_target_data, + NULL +}; + +static int pwrseq_aml_wcn_match(struct pwrseq_device *pwrseq, + struct device *dev) +{ + struct device_node *dev_node = dev->of_node; + + if (!of_property_present(dev_node, "amlogic,wcn-pwrseq")) + return 0; + + return 1; +} + +static int pwrseq_aml_wcn_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct pwrseq_aml_wcn_ctx *ctx; + struct pwrseq_config config; + + ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL); + if (!ctx) + return -ENOMEM; + + ctx->bt_enable_gpio = of_get_named_gpio(dev->of_node, + "amlogic,bt-enable-gpios", 0); + if (!gpio_is_valid(ctx->bt_enable_gpio)) + return dev_err_probe(dev, ctx->bt_enable_gpio, + "Failed to get the bt enable GPIO"); + + ctx->chip_enable_gpio = of_get_named_gpio(dev->of_node, + "amlogic,chip-enable-gpios", 0); + if (!gpio_is_valid(ctx->chip_enable_gpio)) + return dev_err_probe(dev, ctx->bt_enable_gpio, + "Failed to get the chip enable GPIO"); + + ctx->lpo_clk = devm_clk_get_optional(dev, NULL); + if (IS_ERR(ctx->lpo_clk)) + return dev_err_probe(dev, PTR_ERR(ctx->lpo_clk), + "Failed to get the clock source"); + + memset(&config, 0, sizeof(config)); + + config.parent = dev; + config.owner = THIS_MODULE; + config.drvdata = ctx; + config.match = pwrseq_aml_wcn_match; + config.targets = pwrseq_aml_wcn_targets; + + ctx->pwr_count = 0; + ctx->pwrseq = devm_pwrseq_device_register(dev, &config); + if (IS_ERR(ctx->pwrseq)) + return dev_err_probe(dev, PTR_ERR(ctx->pwrseq), + "Failed to register the power sequencer\n"); + + return 0; +} + +static const struct of_device_id pwrseq_aml_wcn_of_match[] = { + { .compatible = "amlogic,w155s2-pwrseq" }, + { /* sentinel */ }, +}; +MODULE_DEVICE_TABLE(of, pwrseq_aml_wcn_of_match); + +static struct platform_driver pwrseq_aml_wcn_driver = { + .driver = { + .name = "pwrseq-aml_wcn", + .of_match_table = pwrseq_aml_wcn_of_match, + }, + .probe = pwrseq_aml_wcn_probe, +}; +module_platform_driver(pwrseq_aml_wcn_driver); + +MODULE_AUTHOR("Yang Li "); +MODULE_DESCRIPTION("Amlogic WCN PMU power sequencing driver"); +MODULE_LICENSE("GPL");