From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from metis.ext.pengutronix.de ([2001:67c:670:201:290:27ff:fe1d:cc33]) by merlin.infradead.org with esmtps (Exim 4.87 #1 (Red Hat Linux)) id 1cUEZV-00038b-P6 for barebox@lists.infradead.org; Thu, 19 Jan 2017 15:24:18 +0000 From: Sascha Hauer Date: Thu, 19 Jan 2017 16:23:55 +0100 Message-Id: <20170119152355.2280-6-s.hauer@pengutronix.de> In-Reply-To: <20170119152355.2280-1-s.hauer@pengutronix.de> References: <20170119152355.2280-1-s.hauer@pengutronix.de> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "barebox" Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: [PATCH 5/5] regulator: Add pfuze driver To: Barebox List This is not yet a regulator driver, only the register map is exported as /dev/pfuze* so the registers can be accessed for debugging purposes. Signed-off-by: Sascha Hauer --- drivers/regulator/Kconfig | 4 ++ drivers/regulator/Makefile | 1 + drivers/regulator/pfuze.c | 169 +++++++++++++++++++++++++++++++++++++++++++++ include/mfd/pfuze.h | 6 ++ 4 files changed, 180 insertions(+) create mode 100644 drivers/regulator/pfuze.c create mode 100644 include/mfd/pfuze.h diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig index 4b4125254..6a6c6d224 100644 --- a/drivers/regulator/Kconfig +++ b/drivers/regulator/Kconfig @@ -16,4 +16,8 @@ config REGULATOR_BCM283X depends on ARCH_BCM283X default y +config REGULATOR_PFUZE + bool "Freescale PFUZE100/200/3000 regulator driver" + depends on I2C + endif diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile index a8dd9bd05..ff5daf9a7 100644 --- a/drivers/regulator/Makefile +++ b/drivers/regulator/Makefile @@ -1,3 +1,4 @@ obj-$(CONFIG_REGULATOR) += core.o obj-$(CONFIG_REGULATOR_FIXED) += fixed.o obj-$(CONFIG_REGULATOR_BCM283X) += bcm2835.o +obj-$(CONFIG_REGULATOR_PFUZE) += pfuze.o \ No newline at end of file diff --git a/drivers/regulator/pfuze.c b/drivers/regulator/pfuze.c new file mode 100644 index 000000000..2a5fb715c --- /dev/null +++ b/drivers/regulator/pfuze.c @@ -0,0 +1,169 @@ +/* + * Copyright (C) 2017 Sascha Hauer, Pengutronix + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * 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 +#include +#include +#include +#include +#include + +#include + +#define DRIVERNAME "pfuze" + +#define MC13XXX_NUMREGS 0x3f + +struct pfuze { + struct device_d *dev; + struct regmap *map; + struct i2c_client *client; + int revision; +}; + +struct pfuze_devtype { + int (*revision)(struct pfuze*); +}; + +#define to_pfuze(a) container_of(a, struct pfuze, cdev) + +static struct pfuze *pfuze_dev; + +static void(*pfuze_init_callback)(struct regmap *map); + +int pfuze_register_init_callback(void(*callback)(struct regmap *map)) +{ + if (pfuze_init_callback) + return -EBUSY; + + pfuze_init_callback = callback; + + if (pfuze_dev) + pfuze_init_callback(pfuze_dev->map); + + return 0; +} + +static int pfuze_i2c_reg_read(void *ctx, unsigned int reg, unsigned int *val) +{ + struct pfuze *pfuze = ctx; + u8 buf[1]; + int ret; + + ret = i2c_read_reg(pfuze->client, reg, buf, 1); + *val = buf[0]; + + return ret == 1 ? 0 : ret; +} + +static int pfuze_i2c_reg_write(void *ctx, unsigned int reg, unsigned int val) +{ + struct pfuze *pfuze = ctx; + u8 buf[] = { + val & 0xff, + }; + int ret; + + ret = i2c_write_reg(pfuze->client, reg, buf, 1); + + return ret == 1 ? 0 : ret; +} + +static struct regmap_bus regmap_pfuze_i2c_bus = { + .reg_write = pfuze_i2c_reg_write, + .reg_read = pfuze_i2c_reg_read, +}; + +static const struct regmap_config pfuze_regmap_i2c_config = { + .reg_bits = 8, + .val_bits = 8, + .max_register = 127, +}; + +static int __init pfuze_probe(struct device_d *dev) +{ + struct pfuze_devtype *devtype; + int ret; + + if (pfuze_dev) + return -EBUSY; + + ret = dev_get_drvdata(dev, (const void **)&devtype); + if (ret) + return ret; + + pfuze_dev = xzalloc(sizeof(*pfuze_dev)); + pfuze_dev->dev = dev; + + pfuze_dev->client = to_i2c_client(dev); + pfuze_dev->map = regmap_init(dev, ®map_pfuze_i2c_bus, + pfuze_dev, &pfuze_regmap_i2c_config); + + ret = regmap_register_cdev(pfuze_dev->map, NULL); + if (ret) + return ret; + + if (pfuze_init_callback) + pfuze_init_callback(pfuze_dev->map); + + return 0; +} + +static struct pfuze_devtype pfuze100_devtype = { +}; + +static struct pfuze_devtype pfuze200_devtype = { +}; + +static struct pfuze_devtype pfuze3000_devtype = { +}; + +static struct platform_device_id pfuze_ids[] = { + { .name = "pfuze100", .driver_data = (ulong)&pfuze100_devtype, }, + { .name = "pfuze200", .driver_data = (ulong)&pfuze200_devtype, }, + { .name = "pfuze3000", .driver_data = (ulong)&pfuze3000_devtype, }, + { } +}; + +static __maybe_unused struct of_device_id pfuze_dt_ids[] = { + { .compatible = "fsl,pfuze100", .data = &pfuze100_devtype, }, + { .compatible = "fsl,pfuze200", .data = &pfuze200_devtype, }, + { .compatible = "fsl,pfuze3000", .data = &pfuze3000_devtype, }, + { } +}; + +static struct driver_d pfuze_i2c_driver = { + .name = "pfuze-i2c", + .probe = pfuze_probe, + .id_table = pfuze_ids, + .of_compatible = DRV_OF_COMPAT(pfuze_dt_ids), +}; + +static int __init pfuze_init(void) +{ + int ret; + + ret = i2c_driver_register(&pfuze_i2c_driver); + if (ret) + return ret; + + return 0; + +} +late_initcall(pfuze_init); diff --git a/include/mfd/pfuze.h b/include/mfd/pfuze.h new file mode 100644 index 000000000..6045ceec0 --- /dev/null +++ b/include/mfd/pfuze.h @@ -0,0 +1,6 @@ +#ifndef __INCLUDE_PFUZE_H +#define __INCLUDE_PFUZE_H + +int pfuze_register_init_callback(void(*callback)(struct regmap *map)); + +#endif /* __INCLUDE_PFUZE_H */ -- 2.11.0 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox