From patchwork Wed May 14 12:38:17 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Boris BREZILLON X-Patchwork-Id: 4174451 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 9D6CABFF02 for ; Wed, 14 May 2014 12:41:31 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id AE4C62037E for ; Wed, 14 May 2014 12:41:30 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id AD4EC20306 for ; Wed, 14 May 2014 12:41:29 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1WkYTF-0000NY-34; Wed, 14 May 2014 12:39:41 +0000 Received: from top.free-electrons.com ([176.31.233.9] helo=mail.free-electrons.com) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1WkYSP-0008Fq-B7 for linux-arm-kernel@lists.infradead.org; Wed, 14 May 2014 12:38:52 +0000 Received: by mail.free-electrons.com (Postfix, from userid 106) id 715E6815; Wed, 14 May 2014 14:38:31 +0200 (CEST) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Spam-Level: X-Spam-Status: No, score=-2.5 required=5.0 tests=BAYES_00,RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 Received: from localhost.localdomain (col31-4-88-188-80-5.fbx.proxad.net [88.188.80.5]) by mail.free-electrons.com (Postfix) with ESMTPSA id 731A9815; Wed, 14 May 2014 14:38:30 +0200 (CEST) From: Boris BREZILLON To: =?UTF-8?q?Emilio=20L=C3=B3pez?= , Mike Turquette , Samuel Ortiz , Lee Jones Subject: [PATCH v4 3/7] mfd: add support for sun6i PRCM (Power/Reset/Clock Management) unit Date: Wed, 14 May 2014 14:38:17 +0200 Message-Id: <1400071101-30553-4-git-send-email-boris.brezillon@free-electrons.com> X-Mailer: git-send-email 1.8.3.2 In-Reply-To: <1400071101-30553-1-git-send-email-boris.brezillon@free-electrons.com> References: <1400071101-30553-1-git-send-email-boris.brezillon@free-electrons.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20140514_053849_766600_75796558 X-CRM114-Status: GOOD ( 15.64 ) X-Spam-Score: 0.3 (/) Cc: devicetree@vger.kernel.org, linux-doc@vger.kernel.org, dev@linux-sunxi.org, Boris BREZILLON , Randy Dunlap , Hans de Goede , Chen-Yu Tsai , Philipp Zabel , Shuge , Maxime Ripard , kevin@allwinnertech.com, linux-arm-kernel@lists.infradead.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP The PRCM (Power/Reset/Clock Management) block exposes several subdevices in different subsystems (clk, reset ...) Add basic support for the PRCM unit with clk (AR100, AHB0, and APB0 clks) and reset controller subdevices. Other subdevices might be added later (if needed). Signed-off-by: Boris BREZILLON Acked-by: Maxime Ripard Acked-by: Lee Jones --- drivers/mfd/Kconfig | 8 +++ drivers/mfd/Makefile | 1 + drivers/mfd/sun6i-prcm.c | 134 +++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 143 insertions(+) create mode 100644 drivers/mfd/sun6i-prcm.c diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig index 6c2a920..34d246f 100644 --- a/drivers/mfd/Kconfig +++ b/drivers/mfd/Kconfig @@ -731,6 +731,14 @@ config MFD_STA2X11 select MFD_CORE select REGMAP_MMIO +config MFD_SUN6I_PRCM + bool "Allwinner A31 PRCM controller" + depends on ARCH_SUNXI + select MFD_CORE + help + Support for the PRCM (Power/Reset/Clock Management) unit available + in A31 SoC. + config MFD_SYSCON bool "System Controller Register R/W Based on Regmap" select REGMAP_MMIO diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile index 1efecf2..df7823c 100644 --- a/drivers/mfd/Makefile +++ b/drivers/mfd/Makefile @@ -29,6 +29,7 @@ obj-$(CONFIG_MFD_STA2X11) += sta2x11-mfd.o obj-$(CONFIG_MFD_STMPE) += stmpe.o obj-$(CONFIG_STMPE_I2C) += stmpe-i2c.o obj-$(CONFIG_STMPE_SPI) += stmpe-spi.o +obj-$(CONFIG_MFD_SUN6I_PRCM) += sun6i-prcm.o obj-$(CONFIG_MFD_TC3589X) += tc3589x.o obj-$(CONFIG_MFD_T7L66XB) += t7l66xb.o tmio_core.o obj-$(CONFIG_MFD_TC6387XB) += tc6387xb.o tmio_core.o diff --git a/drivers/mfd/sun6i-prcm.c b/drivers/mfd/sun6i-prcm.c new file mode 100644 index 0000000..718fc4d --- /dev/null +++ b/drivers/mfd/sun6i-prcm.c @@ -0,0 +1,134 @@ +/* + * Copyright (C) 2014 Free Electrons + * + * License Terms: GNU General Public License v2 + * Author: Boris BREZILLON + * + * Allwinner PRCM (Power/Reset/Clock Management) driver + * + */ + +#include +#include +#include + +struct prcm_data { + int nsubdevs; + const struct mfd_cell *subdevs; +}; + +static const struct resource sun6i_a31_ar100_clk_res[] = { + { + .start = 0x0, + .end = 0x3, + .flags = IORESOURCE_MEM, + }, +}; + +static const struct resource sun6i_a31_apb0_clk_res[] = { + { + .start = 0xc, + .end = 0xf, + .flags = IORESOURCE_MEM, + }, +}; + +static const struct resource sun6i_a31_apb0_gates_clk_res[] = { + { + .start = 0x28, + .end = 0x2b, + .flags = IORESOURCE_MEM, + }, +}; + +static const struct resource sun6i_a31_apb0_rstc_res[] = { + { + .start = 0xb0, + .end = 0xb3, + .flags = IORESOURCE_MEM, + }, +}; + +static const struct mfd_cell sun6i_a31_prcm_subdevs[] = { + { + .name = "sun6i-a31-ar100-clk", + .of_compatible = "allwinner,sun6i-a31-ar100-clk", + .num_resources = ARRAY_SIZE(sun6i_a31_ar100_clk_res), + .resources = sun6i_a31_ar100_clk_res, + }, + { + .name = "sun6i-a31-apb0-clk", + .of_compatible = "allwinner,sun6i-a31-apb0-clk", + .num_resources = ARRAY_SIZE(sun6i_a31_apb0_clk_res), + .resources = sun6i_a31_apb0_clk_res, + }, + { + .name = "sun6i-a31-apb0-gates-clk", + .of_compatible = "allwinner,sun6i-a31-apb0-gates-clk", + .num_resources = ARRAY_SIZE(sun6i_a31_apb0_gates_clk_res), + .resources = sun6i_a31_apb0_gates_clk_res, + }, + { + .name = "sun6i-a31-apb0-clock-reset", + .of_compatible = "allwinner,sun6i-a31-clock-reset", + .num_resources = ARRAY_SIZE(sun6i_a31_apb0_rstc_res), + .resources = sun6i_a31_apb0_rstc_res, + }, +}; + +static const struct prcm_data sun6i_a31_prcm_data = { + .nsubdevs = ARRAY_SIZE(sun6i_a31_prcm_subdevs), + .subdevs = sun6i_a31_prcm_subdevs, +}; + +static const struct of_device_id sun6i_prcm_dt_ids[] = { + { + .compatible = "allwinner,sun6i-a31-prcm", + .data = &sun6i_a31_prcm_data, + }, + { /* sentinel */ }, +}; + +static int sun6i_prcm_probe(struct platform_device *pdev) +{ + struct device_node *np = pdev->dev.of_node; + const struct of_device_id *match; + const struct prcm_data *data; + struct resource *res; + int ret; + + match = of_match_node(sun6i_prcm_dt_ids, np); + if (!match) + return -EINVAL; + + data = match->data; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) { + dev_err(&pdev->dev, "no prcm memory region provided\n"); + return -ENOENT; + } + + ret = mfd_add_devices(&pdev->dev, 0, data->subdevs, data->nsubdevs, + res, -1, NULL); + if (ret) { + dev_err(&pdev->dev, "failed to add subdevices\n"); + return ret; + } + + return 0; +} + +static struct platform_driver sun6i_prcm_driver = { + .driver = { + .name = "sun6i-prcm", + .owner = THIS_MODULE, + .of_match_table = sun6i_prcm_dt_ids, + }, + .probe = sun6i_prcm_probe, +}; +module_platform_driver(sun6i_prcm_driver); + +MODULE_AUTHOR("Boris BREZILLON "); +MODULE_DESCRIPTION("Allwinner sun6i PRCM driver"); +MODULE_LICENSE("GPL v2");