From patchwork Mon Oct 28 18:12:35 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Josh Cartwright X-Patchwork-Id: 3103981 Return-Path: X-Original-To: patchwork-linux-arm-msm@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 19120BF924 for ; Mon, 28 Oct 2013 19:15:52 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 5762320381 for ; Mon, 28 Oct 2013 19:15:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 108D52037F for ; Mon, 28 Oct 2013 19:15:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757435Ab3J1TP1 (ORCPT ); Mon, 28 Oct 2013 15:15:27 -0400 Received: from smtp.codeaurora.org ([198.145.11.231]:45261 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756348Ab3J1TOM (ORCPT ); Mon, 28 Oct 2013 15:14:12 -0400 Received: from smtp.codeaurora.org (localhost [127.0.0.1]) by smtp.codeaurora.org (Postfix) with ESMTP id A6ADF13F2A1; Mon, 28 Oct 2013 19:14:11 +0000 (UTC) Received: by smtp.codeaurora.org (Postfix, from userid 486) id 9730513F2AE; Mon, 28 Oct 2013 19:14:11 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Spam-Level: X-Spam-Status: No, score=-7.4 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 Received: from joshc.qualcomm.com (rrcs-67-52-129-61.west.biz.rr.com [67.52.129.61]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) (Authenticated sender: joshc@smtp.codeaurora.org) by smtp.codeaurora.org (Postfix) with ESMTPSA id E497813F2A1; Mon, 28 Oct 2013 19:14:08 +0000 (UTC) Received: by joshc.qualcomm.com (Postfix, from userid 1000) id C1EFD60D00; Mon, 28 Oct 2013 14:12:55 -0500 (CDT) Message-Id: In-Reply-To: References: From: Josh Cartwright Date: Mon, 28 Oct 2013 13:12:35 -0500 To: Greg Kroah-Hartman , Mark Brown Cc: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-arm-msm@vger.kernel.org, Sagar Dharia , Gilad Avidov , Michael Bohan Subject: [PATCH v3 07/10] regmap: add SPMI support X-Virus-Scanned: ClamAV using ClamSMTP Sender: linux-arm-msm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Add basic support for the System Power Management Interface (SPMI) bus. This is a simple implementation which only implements register accesses via the Extended Register Read/Write Long commands. Signed-off-by: Josh Cartwright --- drivers/base/regmap/Kconfig | 5 ++- drivers/base/regmap/Makefile | 1 + drivers/base/regmap/regmap-spmi.c | 90 +++++++++++++++++++++++++++++++++++++++ include/linux/regmap.h | 5 +++ 4 files changed, 100 insertions(+), 1 deletion(-) create mode 100644 drivers/base/regmap/regmap-spmi.c diff --git a/drivers/base/regmap/Kconfig b/drivers/base/regmap/Kconfig index f0d3054..4251570 100644 --- a/drivers/base/regmap/Kconfig +++ b/drivers/base/regmap/Kconfig @@ -3,7 +3,7 @@ # subsystems should select the appropriate symbols. config REGMAP - default y if (REGMAP_I2C || REGMAP_SPI || REGMAP_MMIO || REGMAP_IRQ) + default y if (REGMAP_I2C || REGMAP_SPI || REGMAP_SPMI || REGMAP_MMIO || REGMAP_IRQ) select LZO_COMPRESS select LZO_DECOMPRESS select IRQ_DOMAIN if REGMAP_IRQ @@ -15,6 +15,9 @@ config REGMAP_I2C config REGMAP_SPI tristate +config REGMAP_SPMI + tristate + config REGMAP_MMIO tristate diff --git a/drivers/base/regmap/Makefile b/drivers/base/regmap/Makefile index cf12998..a7c670b 100644 --- a/drivers/base/regmap/Makefile +++ b/drivers/base/regmap/Makefile @@ -3,5 +3,6 @@ obj-$(CONFIG_REGMAP) += regcache-rbtree.o regcache-lzo.o regcache-flat.o obj-$(CONFIG_DEBUG_FS) += regmap-debugfs.o obj-$(CONFIG_REGMAP_I2C) += regmap-i2c.o obj-$(CONFIG_REGMAP_SPI) += regmap-spi.o +obj-$(CONFIG_REGMAP_SPMI) += regmap-spmi.o obj-$(CONFIG_REGMAP_MMIO) += regmap-mmio.o obj-$(CONFIG_REGMAP_IRQ) += regmap-irq.o diff --git a/drivers/base/regmap/regmap-spmi.c b/drivers/base/regmap/regmap-spmi.c new file mode 100644 index 0000000..ac23910 --- /dev/null +++ b/drivers/base/regmap/regmap-spmi.c @@ -0,0 +1,90 @@ +/* + * Register map access API - SPMI support + * + * Copyright (c) 2012-2013, The Linux Foundation. All rights reserved. + * + * Based on regmap-i2c.c: + * Copyright 2011 Wolfson Microelectronics plc + * Author: Mark Brown + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + */ +#include +#include +#include +#include + +static int regmap_spmi_read(void *context, + const void *reg, size_t reg_size, + void *val, size_t val_size) +{ + BUG_ON(reg_size != 2); + return spmi_ext_register_readl(context, *(u16 *)reg, + val, val_size); +} + +static int regmap_spmi_gather_write(void *context, + const void *reg, size_t reg_size, + const void *val, size_t val_size) +{ + BUG_ON(reg_size != 2); + return spmi_ext_register_writel(context, *(u16 *)reg, val, val_size); +} + +static int regmap_spmi_write(void *context, const void *data, + size_t count) +{ + BUG_ON(count < 2); + return regmap_spmi_gather_write(context, data, 2, data + 2, count - 2); +} + +static struct regmap_bus regmap_spmi = { + .read = regmap_spmi_read, + .write = regmap_spmi_write, + .gather_write = regmap_spmi_gather_write, + .reg_format_endian_default = REGMAP_ENDIAN_NATIVE, + .val_format_endian_default = REGMAP_ENDIAN_NATIVE, +}; + +/** + * regmap_init_spmi(): Initialize register map + * + * @sdev: Device that will be interacted with + * @config: Configuration for register map + * + * The return value will be an ERR_PTR() on error or a valid pointer to + * a struct regmap. + */ +struct regmap *regmap_init_spmi(struct spmi_device *sdev, + const struct regmap_config *config) +{ + return regmap_init(&sdev->dev, ®map_spmi, sdev, config); +} +EXPORT_SYMBOL_GPL(regmap_init_spmi); + +/** + * devm_regmap_init_spmi(): Initialise managed register map + * + * @sdev: Device that will be interacted with + * @config: Configuration for register map + * + * The return value will be an ERR_PTR() on error or a valid pointer + * to a struct regmap. The regmap will be automatically freed by the + * device management code. + */ +struct regmap *devm_regmap_init_spmi(struct spmi_device *sdev, + const struct regmap_config *config) +{ + return devm_regmap_init(&sdev->dev, ®map_spmi, sdev, config); +} +EXPORT_SYMBOL_GPL(devm_regmap_init_spmi); + +MODULE_LICENSE("GPL"); diff --git a/include/linux/regmap.h b/include/linux/regmap.h index a10380b..3f5abc8 100644 --- a/include/linux/regmap.h +++ b/include/linux/regmap.h @@ -23,6 +23,7 @@ struct device; struct i2c_client; struct irq_domain; struct spi_device; +struct spmi_device; struct regmap; struct regmap_range_cfg; struct regmap_field; @@ -318,6 +319,8 @@ struct regmap *regmap_init_i2c(struct i2c_client *i2c, const struct regmap_config *config); struct regmap *regmap_init_spi(struct spi_device *dev, const struct regmap_config *config); +struct regmap *regmap_init_spmi(struct spmi_device *dev, + const struct regmap_config *config); struct regmap *regmap_init_mmio_clk(struct device *dev, const char *clk_id, void __iomem *regs, const struct regmap_config *config); @@ -330,6 +333,8 @@ struct regmap *devm_regmap_init_i2c(struct i2c_client *i2c, const struct regmap_config *config); struct regmap *devm_regmap_init_spi(struct spi_device *dev, const struct regmap_config *config); +struct regmap *devm_regmap_init_spmi(struct spmi_device *dev, + const struct regmap_config *config); struct regmap *devm_regmap_init_mmio_clk(struct device *dev, const char *clk_id, void __iomem *regs, const struct regmap_config *config);