From patchwork Tue Aug 4 16:16:28 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Adam Thomson X-Patchwork-Id: 6942591 Return-Path: X-Original-To: patchwork-linux-pm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 3F7809F39D for ; Tue, 4 Aug 2015 16:18:12 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 00917203F7 for ; Tue, 4 Aug 2015 16:18:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id AECC120382 for ; Tue, 4 Aug 2015 16:18:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754717AbbHDQRz (ORCPT ); Tue, 4 Aug 2015 12:17:55 -0400 Received: from mail1.bemta5.messagelabs.com ([195.245.231.150]:23987 "EHLO mail1.bemta5.messagelabs.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754163AbbHDQQ5 (ORCPT ); Tue, 4 Aug 2015 12:16:57 -0400 Received: from [85.158.139.35] by server-14.bemta-5.messagelabs.com id 4D/14-19125-375E0C55; Tue, 04 Aug 2015 16:16:51 +0000 X-Env-Sender: Adam.Thomson.Opensource@diasemi.com X-Msg-Ref: server-6.tower-179.messagelabs.com!1438705010!44853830!1 X-Originating-IP: [82.210.246.133] X-StarScan-Received: X-StarScan-Version: 6.13.16; banners=-,-,- X-VirusChecked: Checked Received: (qmail 22842 invoked from network); 4 Aug 2015 16:16:50 -0000 Received: from mailrelay1.diasemi.com (HELO NB-EX-CASHUB01.diasemi.com) (82.210.246.133) by server-6.tower-179.messagelabs.com with AES128-SHA encrypted SMTP; 4 Aug 2015 16:16:50 -0000 Received: from mailrelay1.diasemi.com (10.1.17.243) by NB-EX-CASHUB01.diasemi.com (10.1.16.140) with Microsoft SMTP Server id 14.3.248.2; Tue, 4 Aug 2015 18:16:28 +0200 Received: from swsrvapps-01.diasemi.com (Not Verified[10.20.28.141]) by mailrelay1.diasemi.com with ESMTP Gateway id ; Tue, 04 Aug 2015 18:16:28 +0200 Received: (from athomson@localhost) by swsrvapps-01.diasemi.com (8.14.3/8.14.3/Submit/Dlg) id t74GGShF026467; Tue, 4 Aug 2015 17:16:28 +0100 X-Authentication-Warning: swsrvapps-01.diasemi.com: athomson set sender to Adam.Thomson.Opensource@diasemi.com using -f Message-ID: <27d84f4a77aa8bead37cec71bcd19ca8ad548c30.1438692348.git.Adam.Thomson.Opensource@diasemi.com> In-Reply-To: References: From: Adam Thomson Date: Tue, 4 Aug 2015 17:16:28 +0100 Subject: [PATCH v4 1/6] mfd: da9150: Add support for Fuel-Gauge To: Lee Jones , Samuel Ortiz , Sebastian Reichel , Dmitry Eremin-Solenikov , David Woodhouse , Rob Herring , Pawel Moll , Mark Rutland , Ian Campbell , Kumar Gala CC: , , , Support Opensource MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: 8d172408-bd6a-42b1-8e53-daaedf35a5af Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org X-Spam-Status: No, score=-7.0 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Signed-off-by: Adam Thomson Acked-by: Lee Jones --- Changes in v4: - Update compatible string of fuel-gauge to "dlg, da9150-fuel-gauge". Also made similar change to driver name to keep things consistent. Changes in v3: - Use DEFINE_RES_IRQ_NAMED() helper for defining FG IRQ resource. - Unwanted new line & comments removed. - Remove gotos which can be replaced with straight forward return calls. - Add enum for indexing MFD cells list, which is used to assign pdata for FG sub-device. - Remove use of function pointers for QIF related read/write functions as currently only I2C supported, so call I2C functions directly. - Fold fg.h contents into core.h. Changes in v2: - Moved temp callback function prototype to be part of power fuel-gauge patch, as requested by Lee Jones. drivers/mfd/da9150-core.c | 156 ++++++++++++++++++++++++++++++++++++++-- include/linux/mfd/da9150/core.h | 19 ++++- 2 files changed, 167 insertions(+), 8 deletions(-) -- 1.9.3 -- To unsubscribe from this list: send the line "unsubscribe linux-pm" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html diff --git a/drivers/mfd/da9150-core.c b/drivers/mfd/da9150-core.c index 94b9bbd..85ca4b5 100644 --- a/drivers/mfd/da9150-core.c +++ b/drivers/mfd/da9150-core.c @@ -23,6 +23,77 @@ #include #include +/* Raw device access, used for QIF */ +static int da9150_i2c_read_device(struct i2c_client *client, u8 addr, int count, + u8 *buf) +{ + struct i2c_msg xfer; + int ret; + + /* + * Read is split into two transfers as device expects STOP/START rather + * than repeated start to carry out this kind of access. + */ + + /* Write address */ + xfer.addr = client->addr; + xfer.flags = 0; + xfer.len = 1; + xfer.buf = &addr; + + ret = i2c_transfer(client->adapter, &xfer, 1); + if (ret != 1) { + if (ret < 0) + return ret; + else + return -EIO; + } + + /* Read data */ + xfer.addr = client->addr; + xfer.flags = I2C_M_RD; + xfer.len = count; + xfer.buf = buf; + + ret = i2c_transfer(client->adapter, &xfer, 1); + if (ret == 1) + return 0; + else if (ret < 0) + return ret; + else + return -EIO; +} + +static int da9150_i2c_write_device(struct i2c_client *client, u8 addr, + int count, const u8 *buf) +{ + struct i2c_msg xfer; + u8 *reg_data; + int ret; + + reg_data = kzalloc(1 + count, GFP_KERNEL); + if (!reg_data) + return -ENOMEM; + + reg_data[0] = addr; + memcpy(®_data[1], buf, count); + + /* Write address & data */ + xfer.addr = client->addr; + xfer.flags = 0; + xfer.len = 1 + count; + xfer.buf = reg_data; + + ret = i2c_transfer(client->adapter, &xfer, 1); + kfree(reg_data); + if (ret == 1) + return 0; + else if (ret < 0) + return ret; + else + return -EIO; +} + static bool da9150_volatile_reg(struct device *dev, unsigned int reg) { switch (reg) { @@ -107,6 +178,28 @@ static const struct regmap_config da9150_regmap_config = { .volatile_reg = da9150_volatile_reg, }; +void da9150_read_qif(struct da9150 *da9150, u8 addr, int count, u8 *buf) +{ + int ret; + + ret = da9150_i2c_read_device(da9150->core_qif, addr, count, buf); + if (ret < 0) + dev_err(da9150->dev, "Failed to read from QIF 0x%x: %d\n", + addr, ret); +} +EXPORT_SYMBOL_GPL(da9150_read_qif); + +void da9150_write_qif(struct da9150 *da9150, u8 addr, int count, const u8 *buf) +{ + int ret; + + ret = da9150_i2c_write_device(da9150->core_qif, addr, count, buf); + if (ret < 0) + dev_err(da9150->dev, "Failed to write to QIF 0x%x: %d\n", + addr, ret); +} +EXPORT_SYMBOL_GPL(da9150_write_qif); + u8 da9150_reg_read(struct da9150 *da9150, u16 reg) { int val, ret; @@ -297,19 +390,35 @@ static struct resource da9150_charger_resources[] = { }, }; +static struct resource da9150_fg_resources[] = { + DEFINE_RES_IRQ_NAMED(DA9150_IRQ_FG, "FG"), +}; + +enum da9150_dev_idx { + DA9150_GPADC_IDX = 0, + DA9150_CHARGER_IDX, + DA9150_FG_IDX, +}; + static struct mfd_cell da9150_devs[] = { - { + [DA9150_GPADC_IDX] = { .name = "da9150-gpadc", .of_compatible = "dlg,da9150-gpadc", .resources = da9150_gpadc_resources, .num_resources = ARRAY_SIZE(da9150_gpadc_resources), }, - { + [DA9150_CHARGER_IDX] = { .name = "da9150-charger", .of_compatible = "dlg,da9150-charger", .resources = da9150_charger_resources, .num_resources = ARRAY_SIZE(da9150_charger_resources), }, + [DA9150_FG_IDX] = { + .name = "da9150-fuel-gauge", + .of_compatible = "dlg,da9150-fuel-gauge", + .resources = da9150_fg_resources, + .num_resources = ARRAY_SIZE(da9150_fg_resources), + }, }; static int da9150_probe(struct i2c_client *client, @@ -317,6 +426,7 @@ static int da9150_probe(struct i2c_client *client, { struct da9150 *da9150; struct da9150_pdata *pdata = dev_get_platdata(&client->dev); + int qif_addr; int ret; da9150 = devm_kzalloc(&client->dev, sizeof(*da9150), GFP_KERNEL); @@ -335,16 +445,41 @@ static int da9150_probe(struct i2c_client *client, return ret; } - da9150->irq_base = pdata ? pdata->irq_base : -1; + /* Setup secondary I2C interface for QIF access */ + qif_addr = da9150_reg_read(da9150, DA9150_CORE2WIRE_CTRL_A); + qif_addr = (qif_addr & DA9150_CORE_BASE_ADDR_MASK) >> 1; + qif_addr |= DA9150_QIF_I2C_ADDR_LSB; + da9150->core_qif = i2c_new_dummy(client->adapter, qif_addr); + if (!da9150->core_qif) { + dev_err(da9150->dev, "Failed to attach QIF client\n"); + return -ENODEV; + } + + i2c_set_clientdata(da9150->core_qif, da9150); + + if (pdata) { + da9150->irq_base = pdata->irq_base; + + da9150_devs[DA9150_FG_IDX].platform_data = pdata->fg_pdata; + da9150_devs[DA9150_FG_IDX].pdata_size = + sizeof(struct da9150_fg_pdata); + } else { + da9150->irq_base = -1; + } ret = regmap_add_irq_chip(da9150->regmap, da9150->irq, IRQF_TRIGGER_LOW | IRQF_ONESHOT, da9150->irq_base, &da9150_regmap_irq_chip, &da9150->regmap_irq_data); - if (ret) - return ret; + if (ret) { + dev_err(da9150->dev, "Failed to add regmap irq chip: %d\n", + ret); + goto regmap_irq_fail; + } + da9150->irq_base = regmap_irq_chip_get_base(da9150->regmap_irq_data); + enable_irq_wake(da9150->irq); ret = mfd_add_devices(da9150->dev, -1, da9150_devs, @@ -352,11 +487,17 @@ static int da9150_probe(struct i2c_client *client, da9150->irq_base, NULL); if (ret) { dev_err(da9150->dev, "Failed to add child devices: %d\n", ret); - regmap_del_irq_chip(da9150->irq, da9150->regmap_irq_data); - return ret; + goto mfd_fail; } return 0; + +mfd_fail: + regmap_del_irq_chip(da9150->irq, da9150->regmap_irq_data); +regmap_irq_fail: + i2c_unregister_device(da9150->core_qif); + + return ret; } static int da9150_remove(struct i2c_client *client) @@ -365,6 +506,7 @@ static int da9150_remove(struct i2c_client *client) regmap_del_irq_chip(da9150->irq, da9150->regmap_irq_data); mfd_remove_devices(da9150->dev); + i2c_unregister_device(da9150->core_qif); return 0; } diff --git a/include/linux/mfd/da9150/core.h b/include/linux/mfd/da9150/core.h index 76e6689..1bf50ca 100644 --- a/include/linux/mfd/da9150/core.h +++ b/include/linux/mfd/da9150/core.h @@ -15,6 +15,7 @@ #define __DA9150_CORE_H #include +#include #include #include @@ -46,23 +47,39 @@ #define DA9150_IRQ_GPADC 19 #define DA9150_IRQ_WKUP 20 +/* I2C sub-device address */ +#define DA9150_QIF_I2C_ADDR_LSB 0x5 + +struct da9150_fg_pdata { + u32 update_interval; /* msecs */ + u8 warn_soc_lvl; /* % value */ + u8 crit_soc_lvl; /* % value */ +}; + struct da9150_pdata { int irq_base; + struct da9150_fg_pdata *fg_pdata; }; struct da9150 { struct device *dev; struct regmap *regmap; + struct i2c_client *core_qif; + struct regmap_irq_chip_data *regmap_irq_data; int irq; int irq_base; }; -/* Device I/O */ +/* Device I/O - Query Interface for FG and standard register access */ +void da9150_read_qif(struct da9150 *da9150, u8 addr, int count, u8 *buf); +void da9150_write_qif(struct da9150 *da9150, u8 addr, int count, const u8 *buf); + u8 da9150_reg_read(struct da9150 *da9150, u16 reg); void da9150_reg_write(struct da9150 *da9150, u16 reg, u8 val); void da9150_set_bits(struct da9150 *da9150, u16 reg, u8 mask, u8 val); void da9150_bulk_read(struct da9150 *da9150, u16 reg, int count, u8 *buf); void da9150_bulk_write(struct da9150 *da9150, u16 reg, int count, const u8 *buf); + #endif /* __DA9150_CORE_H */