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Ip=[66.35.236.236]; Helo=[sj-itexedge04.altera.priv.altera.com] X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BN3PR03MB2273 Sender: linux-gpio-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-gpio@vger.kernel.org From: Thor Thayer Add support for the Altera Arria10 Development Kit System Resource chip which is implemented using a MAX5 as a external gpio extender, and power supply alarm (hwmon) with the regmap framework over a SPI bus. Signed-off-by: Thor Thayer --- drivers/mfd/Kconfig | 11 +++ drivers/mfd/Makefile | 2 + drivers/mfd/altera-a10sr.c | 179 ++++++++++++++++++++++++++++++++++++++ include/linux/mfd/altera-a10sr.h | 87 ++++++++++++++++++ 4 files changed, 279 insertions(+) create mode 100644 drivers/mfd/altera-a10sr.c create mode 100644 include/linux/mfd/altera-a10sr.h diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig index eea61e3..4fc27c6 100644 --- a/drivers/mfd/Kconfig +++ b/drivers/mfd/Kconfig @@ -18,6 +18,17 @@ config MFD_CS5535 This is the core driver for CS5535/CS5536 MFD functions. This is necessary for using the board's GPIO and MFGPT functionality. +config MFD_ALTERA_A10SR + bool "Altera Arria10 DevKit System Resource chip" + depends on ARCH_SOCFPGA && SPI_MASTER=y && OF + select REGMAP_SPI + select MFD_CORE + help + Support for the Altera Arria10 DevKit MAX5 System Resource chip + using the SPI interface. This driver provides common support for + accessing the external gpio extender (LEDs & buttons) and + power supply alarms (hwmon). + config MFD_ACT8945A tristate "Active-semi ACT8945A" select MFD_CORE diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile index 5eaa6465d..4f1ff91 100644 --- a/drivers/mfd/Makefile +++ b/drivers/mfd/Makefile @@ -203,3 +203,5 @@ intel-soc-pmic-objs := intel_soc_pmic_core.o intel_soc_pmic_crc.o intel-soc-pmic-$(CONFIG_INTEL_PMC_IPC) += intel_soc_pmic_bxtwc.o obj-$(CONFIG_INTEL_SOC_PMIC) += intel-soc-pmic.o obj-$(CONFIG_MFD_MT6397) += mt6397-core.o + +obj-$(CONFIG_MFD_ALTERA_A10SR) += altera-a10sr.o diff --git a/drivers/mfd/altera-a10sr.c b/drivers/mfd/altera-a10sr.c new file mode 100644 index 0000000..2ff08e3 --- /dev/null +++ b/drivers/mfd/altera-a10sr.c @@ -0,0 +1,179 @@ +/* + * Copyright Altera Corporation (C) 2014-2016. All Rights Reserved + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope 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. + * + * You should have received a copy of the GNU General Public License along with + * this program. If not, see . + * + * SPI access for Altera Arria10 MAX5 System Resource Chip + * + * Adapted from DA9052 + * Copyright(c) 2011 Dialog Semiconductor Ltd. + * Author: David Dajun Chen + */ + +#include +#include +#include +#include +#include + +static const struct mfd_cell altr_a10sr_subdev_info[] = { + { + .name = "altr_a10sr_gpio", + .of_compatible = "altr,a10sr-gpio", + }, +}; + +static bool altr_a10sr_reg_readable(struct device *dev, unsigned int reg) +{ + switch (reg) { + case ALTR_A10SR_VERSION_READ: + case ALTR_A10SR_LED_REG: + case ALTR_A10SR_PBDSW_REG: + case ALTR_A10SR_PBDSW_IRQ_REG: + case ALTR_A10SR_PWR_GOOD1_REG: + case ALTR_A10SR_PWR_GOOD2_REG: + case ALTR_A10SR_PWR_GOOD3_REG: + case ALTR_A10SR_FMCAB_REG: + case ALTR_A10SR_HPS_RST_REG: + case ALTR_A10SR_USB_QSPI_REG: + case ALTR_A10SR_SFPA_REG: + case ALTR_A10SR_SFPB_REG: + case ALTR_A10SR_I2C_M_REG: + case ALTR_A10SR_WARM_RST_REG: + case ALTR_A10SR_WR_KEY_REG: + case ALTR_A10SR_PMBUS_REG: + return true; + default: + return false; + } +} + +static bool altr_a10sr_reg_writeable(struct device *dev, unsigned int reg) +{ + switch (reg) { + case ALTR_A10SR_LED_REG: + case ALTR_A10SR_PBDSW_IRQ_REG: + case ALTR_A10SR_FMCAB_REG: + case ALTR_A10SR_HPS_RST_REG: + case ALTR_A10SR_USB_QSPI_REG: + case ALTR_A10SR_SFPA_REG: + case ALTR_A10SR_SFPB_REG: + case ALTR_A10SR_WARM_RST_REG: + case ALTR_A10SR_WR_KEY_REG: + case ALTR_A10SR_PMBUS_REG: + return true; + default: + return false; + } +} + +static bool altr_a10sr_reg_volatile(struct device *dev, unsigned int reg) +{ + switch (reg) { + case ALTR_A10SR_PBDSW_REG: + case ALTR_A10SR_PBDSW_IRQ_REG: + case ALTR_A10SR_PWR_GOOD1_REG: + case ALTR_A10SR_PWR_GOOD2_REG: + case ALTR_A10SR_PWR_GOOD3_REG: + case ALTR_A10SR_HPS_RST_REG: + case ALTR_A10SR_I2C_M_REG: + case ALTR_A10SR_WARM_RST_REG: + case ALTR_A10SR_WR_KEY_REG: + case ALTR_A10SR_PMBUS_REG: + return true; + default: + return false; + } +} + +const struct regmap_config altr_a10sr_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + + .cache_type = REGCACHE_NONE, + + .use_single_rw = true, + .read_flag_mask = 1, + .write_flag_mask = 0, + + .max_register = ALTR_A10SR_WR_KEY_REG, + .readable_reg = altr_a10sr_reg_readable, + .writeable_reg = altr_a10sr_reg_writeable, + .volatile_reg = altr_a10sr_reg_volatile, + +}; + +static int altr_a10sr_spi_probe(struct spi_device *spi) +{ + int ret; + struct altr_a10sr *a10sr; + + a10sr = devm_kzalloc(&spi->dev, sizeof(*a10sr), + GFP_KERNEL); + if (!a10sr) + return -ENOMEM; + + spi->mode = SPI_MODE_3; + spi->bits_per_word = 8; + spi_setup(spi); + + a10sr->dev = &spi->dev; + + spi_set_drvdata(spi, a10sr); + + a10sr->regmap = devm_regmap_init_spi(spi, &altr_a10sr_regmap_config); + if (IS_ERR(a10sr->regmap)) { + ret = PTR_ERR(a10sr->regmap); + dev_err(&spi->dev, "Failed to allocate register map: %d\n", + ret); + return ret; + } + + ret = mfd_add_devices(a10sr->dev, PLATFORM_DEVID_AUTO, + altr_a10sr_subdev_info, + ARRAY_SIZE(altr_a10sr_subdev_info), + NULL, 0, NULL); + if (ret) + dev_err(a10sr->dev, "Failed to register sub-devices: %d\n", + ret); + + return ret; +} + +static int altr_a10sr_spi_remove(struct spi_device *spi) +{ + mfd_remove_devices(&spi->dev); + + return 0; +} + +static const struct of_device_id altr_a10sr_spi_of_match[] = { + { .compatible = "altr,a10sr" }, + { }, +}; +MODULE_DEVICE_TABLE(of, altr_a10sr_spi_of_match); + +static struct spi_driver altr_a10sr_spi_driver = { + .probe = altr_a10sr_spi_probe, + .remove = altr_a10sr_spi_remove, + .driver = { + .name = "altr_a10sr", + .of_match_table = of_match_ptr(altr_a10sr_spi_of_match), + }, +}; + +module_spi_driver(altr_a10sr_spi_driver); + +MODULE_LICENSE("GPL v2"); +MODULE_AUTHOR("Thor Thayer "); +MODULE_DESCRIPTION("Altera Arria10 DevKit System Resource MFD Driver"); diff --git a/include/linux/mfd/altera-a10sr.h b/include/linux/mfd/altera-a10sr.h new file mode 100644 index 0000000..c869fe7 --- /dev/null +++ b/include/linux/mfd/altera-a10sr.h @@ -0,0 +1,87 @@ +/* + * Copyright Altera Corporation (C) 2014-2016. All Rights Reserved + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope 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. + * + * You should have received a copy of the GNU General Public License along with + * this program. If not, see . + * + * Declarations for Altera Arria10 MAX5 System Resource Chip + * + * Adapted from DA9052 + * Copyright(c) 2011 Dialog Semiconductor Ltd. + * Author: David Dajun Chen + */ + +#ifndef __MFD_ALTERA_A10SR_H +#define __MFD_ALTERA_A10SR_H + +#include +#include +#include +#include +#include + +/* Write registers are always on even addresses */ +#define WRITE_REG_MASK 0xFE +/* Odd registers are always on odd addresses */ +#define READ_REG_MASK 0x01 + +#define ALTR_A10SR_BITS_PER_REGISTER 8 +/* + * To find the correct register, we divide the input GPIO by + * the number of GPIO in each register. We then need to multiply + * by 2 because the reads are at odd addresses. + */ +#define ALTR_A10SR_REG_OFFSET(X) (((X) / ALTR_A10SR_BITS_PER_REGISTER) << 1) +#define ALTR_A10SR_REG_BIT(X) ((X) % ALTR_A10SR_BITS_PER_REGISTER) +#define ALTR_A10SR_REG_BIT_CHG(X, Y) ((X) << ALTR_A10SR_REG_BIT(Y)) +#define ALTR_A10SR_REG_BIT_MASK(X) (1 << ALTR_A10SR_REG_BIT(X)) + +/* Arria10 System Controller Register Defines */ +#define ALTR_A10SR_NOP 0x00 /* No Change */ +#define ALTR_A10SR_VERSION_READ 0x00 /* MAX5 Version Read */ + +#define ALTR_A10SR_LED_REG 0x02 /* LED - Upper 4 bits */ +/* LED register Bit Definitions */ +#define ALTR_A10SR_LED_VALID_SHIFT 4 /* LED - Upper 4 bits valid */ +#define ALTR_A10SR_OUT_VALID_RANGE_LO ALTR_A10SR_LED_VALID_SHIFT +#define ALTR_A10SR_OUT_VALID_RANGE_HI 7 + +#define ALTR_A10SR_PBDSW_REG 0x04 /* PB & DIP SW - Input only */ +#define ALTR_A10SR_PBDSW_IRQ_REG 0x06 /* PB & DIP SW Flag Clear */ +/* Pushbutton & DIP Switch Bit Definitions */ +#define ALTR_A10SR_IN_VALID_RANGE_LO 8 +#define ALTR_A10SR_IN_VALID_RANGE_HI 15 + +#define ALTR_A10SR_PWR_GOOD1_REG 0x08 /* Power Good1 Read */ +#define ALTR_A10SR_PWR_GOOD2_REG 0x0A /* Power Good2 Read */ +#define ALTR_A10SR_PWR_GOOD3_REG 0x0C /* Power Good3 Read */ +#define ALTR_A10SR_FMCAB_REG 0x0E /* FMCA/B & PCIe Pwr Enable */ +#define ALTR_A10SR_HPS_RST_REG 0x10 /* HPS Reset */ +#define ALTR_A10SR_USB_QSPI_REG 0x12 /* USB, BQSPI, FILE Reset */ +#define ALTR_A10SR_SFPA_REG 0x14 /* SFPA Control Reg */ +#define ALTR_A10SR_SFPB_REG 0x16 /* SFPB Control Reg */ +#define ALTR_A10SR_I2C_M_REG 0x18 /* I2C Master Select */ +#define ALTR_A10SR_WARM_RST_REG 0x1A /* HPS Warm Reset */ +#define ALTR_A10SR_WR_KEY_REG 0x1C /* HPS Warm Reset Key */ +#define ALTR_A10SR_PMBUS_REG 0x1E /* HPS PM Bus */ + +/** + * struct altr_a10sr - Altera Max5 MFD device private data structure + * @dev: : this device + * @regmap: the regmap assigned to the parent device. + */ +struct altr_a10sr { + struct device *dev; + struct regmap *regmap; +}; + +#endif /* __MFD_ALTERA_A10SR_H */