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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "barebox" X-SA-Exim-Connect-IP: 2607:7c80:54:e::133 X-SA-Exim-Mail-From: barebox-bounces+lore=pengutronix.de@lists.infradead.org X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on metis.ext.pengutronix.de X-Spam-Level: X-Spam-Status: No, score=-3.4 required=4.0 tests=AWL,BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED,SPF_HELO_NONE,SPF_NONE autolearn=unavailable autolearn_force=no version=3.4.2 Subject: [PATCH 1/2] Add the base Ricoh RN5T568 PMIC driver X-SA-Exim-Version: 4.2.1 (built Wed, 08 May 2019 21:11:16 +0000) X-SA-Exim-Scanned: Yes (on metis.ext.pengutronix.de) --- drivers/mfd/Kconfig | 6 ++ drivers/mfd/Makefile | 1 + drivers/mfd/rn5t568.c | 165 ++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 172 insertions(+) create mode 100644 drivers/mfd/rn5t568.c diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig index 8468a2d..1602480 100644 --- a/drivers/mfd/Kconfig +++ b/drivers/mfd/Kconfig @@ -68,6 +68,12 @@ config MFD_STPMIC1 help Select this to support communication with the STPMIC1. +config MFD_RN568PMIC + depends on I2C + bool "Ricoh RN5T568 MFD driver" + help + Select this to support communication with the Ricoh RN5T568 PMIC. + config MFD_SUPERIO bool diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile index 2bcf900..50f54cf 100644 --- a/drivers/mfd/Makefile +++ b/drivers/mfd/Makefile @@ -13,6 +13,7 @@ obj-$(CONFIG_MFD_TWL4030) += twl4030.o obj-$(CONFIG_MFD_TWL6030) += twl6030.o obj-$(CONFIG_RAVE_SP_CORE) += rave-sp.o obj-$(CONFIG_MFD_STPMIC1) += stpmic1.o +obj-$(CONFIG_MFD_RN568PMIC) += rn5t568.o obj-$(CONFIG_MFD_SUPERIO) += superio.o obj-$(CONFIG_FINTEK_SUPERIO) += fintek-superio.o obj-$(CONFIG_SMSC_SUPERIO) += smsc-superio.o diff --git a/drivers/mfd/rn5t568.c b/drivers/mfd/rn5t568.c new file mode 100644 index 0000000..ad53d7b --- /dev/null +++ b/drivers/mfd/rn5t568.c @@ -0,0 +1,165 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * MFD core driver for Ricoh RN5T618 PMIC + * Note: Manufacturer is now Nisshinbo Micro Devices Inc. + * + * Copyright (C) 2014 Beniamino Galvani + * Copyright (C) 2016 Toradex AG + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define RN5T568_LSIVER 0x00 +#define RN5T568_OTPVER 0x01 +#define RN5T568_PONHIS 0x09 +# define RN5T568_PONHIS_ON_EXTINPON BIT(3) +# define RN5T568_PONHIS_ON_REPWRPON BIT(1) +# define RN5T568_PONHIS_ON_PWRONPON BIT(0) +#define RN5T568_POFFHIS 0x0a +# define RN5T568_POFFHIS_N_OEPOFF BIT(7) +# define RN5T568_POFFHIS_DCLIMPOFF BIT(6) +# define RN5T568_POFFHIS_WDGPOFF BIT(5) +# define RN5T568_POFFHIS_CPUPOFF BIT(4) +# define RN5T568_POFFHIS_IODETPOFF BIT(3) +# define RN5T568_POFFHIS_VINDETPOFF BIT(2) +# define RN5T568_POFFHIS_TSHUTPOFF BIT(1) +# define RN5T568_POFFHIS_PWRONPOFF BIT(0) +#define RN5T568_SLPCNT 0x0e +# define RN5T568_SLPCNT_SWPPWROFF BIT(0) +#define RN5T568_REPCNT 0x0f +# define RN5T568_REPCNT_OFF_RESETO_16MS 0x30 +# define RN5T568_REPCNT_OFF_REPWRTIM_1000MS 0x06 +# define RN5T568_REPCNT_OFF_REPWRON BIT(0) +#define RN5T568_MAX_REG 0xbc + +struct rn5t568 { + struct restart_handler restart; + struct regmap *regmap; +}; + +static struct rn5t568 single_pmic; + +static void rn5t568_restart(struct restart_handler *rst) +{ + struct rn5t568 *rn5t568 = container_of(rst, struct rn5t568, restart); + + regmap_write(rn5t568->regmap, RN5T568_SLPCNT, RN5T568_SLPCNT_SWPPWROFF); +} + +static int rn5t568_reset_reason_detect(struct device_d *dev, struct regmap *regmap) +{ + unsigned int reg; + int ret; + + ret = regmap_read(regmap, RN5T568_PONHIS, ®); + if (ret) + return ret; + + dev_dbg(dev, "Power-on history: %x\n", reg); + + if (reg == 0) { + dev_info(dev, "No power-on reason available\n"); + return 0; + } + + if (reg & RN5T568_PONHIS_ON_EXTINPON) { + reset_source_set_device(dev, RESET_POR); + return 0; + } else if (reg & RN5T568_PONHIS_ON_PWRONPON) { + reset_source_set_device(dev, RESET_POR); + return 0; + } else if (!(reg & RN5T568_PONHIS_ON_REPWRPON)) + return -EINVAL; + + ret = regmap_read(regmap, RN5T568_POFFHIS, ®); + if (ret) + return ret; + + dev_dbg(dev, "Power-off history: %x\n", reg); + + if (reg & RN5T568_POFFHIS_PWRONPOFF) + reset_source_set_device(dev, RESET_POR); + else if (reg & RN5T568_POFFHIS_TSHUTPOFF) + reset_source_set_device(dev, RESET_THERM); + else if (reg & RN5T568_POFFHIS_VINDETPOFF) + reset_source_set_device(dev, RESET_BROWNOUT); + else if (reg & RN5T568_POFFHIS_IODETPOFF) + reset_source_set_device(dev, RESET_UKWN); + else if (reg & RN5T568_POFFHIS_CPUPOFF) + reset_source_set_device(dev, RESET_RST); + else if (reg & RN5T568_POFFHIS_WDGPOFF) + reset_source_set_device(dev, RESET_WDG); + else if (reg & RN5T568_POFFHIS_DCLIMPOFF) + reset_source_set_device(dev, RESET_BROWNOUT); + else if (reg & RN5T568_POFFHIS_N_OEPOFF) + reset_source_set_device(dev, RESET_EXT); + else + return -EINVAL; + + return 0; +} + +static const struct regmap_config rn5t568_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + .max_register = RN5T568_MAX_REG, +}; + +static int __init rn5t568_i2c_probe(struct device_d *dev) +{ + static const unsigned int val = RN5T568_REPCNT_OFF_RESETO_16MS | RN5T568_REPCNT_OFF_REPWRTIM_1000MS | RN5T568_REPCNT_OFF_REPWRON; + unsigned char reg[4]; + int ret; + + single_pmic.regmap = regmap_init_i2c(to_i2c_client(dev), &rn5t568_regmap_config); + if (IS_ERR(single_pmic.regmap)) + return PTR_ERR(single_pmic.regmap); + + ret = regmap_register_cdev(single_pmic.regmap, NULL); + if (ret) + return ret; + + ret = regmap_bulk_read(single_pmic.regmap, RN5T568_LSIVER, ®, 2); + if (ret) { + dev_err(dev, "Failed to read PMIC version via I2C\n"); + return ret; + } + + dev_info(dev, "Found NMD RN5T568 LSI %x, OTP: %x\n", reg[0], reg[1]); + + /* used to trigger software reset and by a watchdog trigger */ + regmap_write(single_pmic.regmap, RN5T568_REPCNT, val); + + single_pmic.restart.priority = of_get_restart_priority(dev->device_node); + single_pmic.restart.name = "RN5T568"; + single_pmic.restart.restart = &rn5t568_restart; + restart_handler_register(&single_pmic.restart); + dev_dbg(dev, "RN5t: Restart handler with priority %d registered\n", single_pmic.restart.priority); + + ret = rn5t568_reset_reason_detect(dev, single_pmic.regmap); + if (ret) + dev_warn(dev, "Failed to query reset reason\n"); + + return of_platform_populate(dev->device_node, NULL, dev); +} + +static __maybe_unused const struct of_device_id rn5t568_of_match[] = { + { .compatible = "ricoh,rn5t568", .data = NULL, }, + { } +}; + +static struct driver_d rn5t568_i2c_driver = { + .name = "rn5t568-i2c", + .probe = rn5t568_i2c_probe, + .of_compatible = DRV_OF_COMPAT(rn5t568_of_match), +}; + +coredevice_i2c_driver(rn5t568_i2c_driver); -- 2.30.2 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox