From patchwork Mon Oct 2 22:32:22 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shawn Anastasio X-Patchwork-Id: 729044 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6FBD91E521 for ; Mon, 2 Oct 2023 22:40:28 +0000 (UTC) Received: from raptorengineering.com (mail.raptorengineering.com [23.155.224.40]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 64DB6B7; Mon, 2 Oct 2023 15:40:24 -0700 (PDT) Received: from localhost (localhost [127.0.0.1]) by mail.rptsys.com (Postfix) with ESMTP id 648DC82859F5; Mon, 2 Oct 2023 17:32:37 -0500 (CDT) Received: from mail.rptsys.com ([127.0.0.1]) by localhost (vali.starlink.edu [127.0.0.1]) (amavisd-new, port 10032) with ESMTP id RwqQdCb5DVhl; Mon, 2 Oct 2023 17:32:35 -0500 (CDT) Received: from localhost (localhost [127.0.0.1]) by mail.rptsys.com (Postfix) with ESMTP id 4A44D8286991; Mon, 2 Oct 2023 17:32:35 -0500 (CDT) DKIM-Filter: OpenDKIM Filter v2.10.3 mail.rptsys.com 4A44D8286991 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=raptorengineering.com; s=B8E824E6-0BE2-11E6-931D-288C65937AAD; t=1696285955; bh=FENQxFl2vU5NVFpz+ChM8Sok4Y7J//ItdVczRNx9FMQ=; h=From:To:Date:Message-Id:MIME-Version; b=HGb0Hv/iId7ARLXjt791adsqDCnxcIdPRq2El3tXZcCiKSVahxIXtgwWPn7HKmY1H K5AajneV1JfJw6dA0We7zttvcSHnwlh4C/5DGMa5Ti8SOntzF1RtztXsQVll5VFCL0 2Brt1r+5rSmORRc0FIaFTPOOo+hQf8YBszL85E8c= X-Virus-Scanned: amavisd-new at rptsys.com Received: from mail.rptsys.com ([127.0.0.1]) by localhost (vali.starlink.edu [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id hYrUXDMnt-DJ; Mon, 2 Oct 2023 17:32:34 -0500 (CDT) Received: from raptor-ewks-026.lan (5.edge.rptsys.com [23.155.224.38]) by mail.rptsys.com (Postfix) with ESMTPSA id 5524F828574D; Mon, 2 Oct 2023 17:32:34 -0500 (CDT) From: Shawn Anastasio To: devicetree@vger.kernel.org, lee@kernel.org Cc: Timothy Pearson , linux-kernel@vger.kernel.org, Georgy Yakovlev , Shawn Anastasio Subject: [PATCH 3/3] mfd: sie-cronos-cpld: Add driver for SIE cronos CPLD Date: Mon, 2 Oct 2023 17:32:22 -0500 Message-Id: <2e9763cb4fa258fe11769a4ff1544d96c536a4a2.1696285339.git.sanastasio@raptorengineering.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: References: Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_BLOCKED, SPF_HELO_PASS,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net From: Timothy Pearson The SIE Cronos Platform Controller CPLD is a multi-purpose platform controller that provides both a watchdog timer and an LED controller. As both functions are provided by the same CPLD, a multi-function device is exposed as the parent of both functions. Signed-off-by: Timothy Pearson Signed-off-by: Shawn Anastasio --- MAINTAINERS | 7 + drivers/mfd/Kconfig | 11 + drivers/mfd/Makefile | 1 + drivers/mfd/sie-cronos-cpld.c | 589 +++++++++++++++++++++++ include/linux/mfd/sie/cronos/core.h | 17 + include/linux/mfd/sie/cronos/registers.h | 59 +++ 6 files changed, 684 insertions(+) create mode 100644 drivers/mfd/sie-cronos-cpld.c create mode 100644 include/linux/mfd/sie/cronos/core.h create mode 100644 include/linux/mfd/sie/cronos/registers.h -- 2.30.2 diff --git a/MAINTAINERS b/MAINTAINERS index 79630b7d946e..1e9c044455f2 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -19545,6 +19545,13 @@ F: drivers/media/mmc/siano/ F: drivers/media/usb/siano/ F: drivers/media/usb/siano/ +SIE CRONOS CPLD DRIVER +M: Georgy Yakovlev +S: Maintained +F: Documentation/devicetree/bindings/mfd/sie,cronos-cpld.yaml +F: drivers/mfd/sie-cronos-cpld.c +F: include/linux/mfd/sie/cronos/ + SIEMENS IPC LED DRIVERS M: Gerd Haeussler M: Xing Tong Wu diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig index aea95745c73f..8312759ce5c9 100644 --- a/drivers/mfd/Kconfig +++ b/drivers/mfd/Kconfig @@ -2216,6 +2216,17 @@ config MFD_QCOM_PM8008 under it in the device tree. Additional drivers must be enabled in order to use the functionality of the device. +config MFD_SIE_CRONOS_CPLD + tristate "SIE Cronos CPLD Support" + select MFD_CORE + select REGMAP_I2C + depends on I2C + help + Support for the SIE Cronos system control CPLDs. Additional drivers must + be enabled in order to use the functionality of the device, including LED + control and the system watchdog. The controller itself is a custom design + tailored to the specific needs of the SIE Cronos hardware platform. + menu "Multimedia Capabilities Port drivers" depends on ARCH_SA1100 diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile index c66f07edcd0e..a580c549e3ab 100644 --- a/drivers/mfd/Makefile +++ b/drivers/mfd/Makefile @@ -284,3 +284,4 @@ rsmu-i2c-objs := rsmu_core.o rsmu_i2c.o rsmu-spi-objs := rsmu_core.o rsmu_spi.o obj-$(CONFIG_MFD_RSMU_I2C) += rsmu-i2c.o obj-$(CONFIG_MFD_RSMU_SPI) += rsmu-spi.o +obj-$(CONFIG_MFD_SIE_CRONOS_CPLD) += sie-cronos-cpld.o diff --git a/drivers/mfd/sie-cronos-cpld.c b/drivers/mfd/sie-cronos-cpld.c new file mode 100644 index 000000000000..43fc51e07e7f --- /dev/null +++ b/drivers/mfd/sie-cronos-cpld.c @@ -0,0 +1,589 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * I2C device driver for SIE Cronos CPLDs + * Copyright (C) 2015-2017 Dialog Semiconductor + * Copyright (C) 2022 Raptor Engineering, LLC + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +static struct resource cronos_wdt_resources[] = { +}; + +static struct resource cronos_led_resources[] = { +}; + +static const struct mfd_cell cronos_cpld_devs[] = { + { + .name = "cronos-watchdog", + .num_resources = ARRAY_SIZE(cronos_wdt_resources), + .resources = cronos_wdt_resources, + .of_compatible = "sie,cronos-watchdog", + }, + { + .name = "cronos-leds", + .id = 1, + .num_resources = ARRAY_SIZE(cronos_led_resources), + .resources = cronos_led_resources, + .of_compatible = "sie,cronos-leds", + }, +}; + +static ssize_t payload_power_show(struct device *dev, struct device_attribute *attr, char *buf) +{ + unsigned int payloadpower_val = 0; + int ret = -EIO; + struct sie_cronos_cpld *chip = dev_get_drvdata(dev); + + ret = regmap_read(chip->regmap, CRONOS_CPLD_PAYLOAD_POWER_CTL_REG, &payloadpower_val); + if (ret < 0) + return ret; + + return snprintf(buf, PAGE_SIZE, "0x%02x\n", payloadpower_val); +} + +static ssize_t payload_power_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t len) +{ + u8 val = 0; + int ret = -EIO; + struct sie_cronos_cpld *chip = dev_get_drvdata(dev); + + if (kstrtou8(buf, 0, &val)) + return -EINVAL; + + ret = regmap_write(chip->regmap, CRONOS_CPLD_PAYLOAD_POWER_CTL_REG, val); + if (ret) { + dev_err(dev, "Failed to write value 0x%02x to address 0x%02x", + val, CRONOS_CPLD_PAYLOAD_POWER_CTL_REG); + return ret; + } + return len; +} + + +static ssize_t bmc_flash_show(struct device *dev, struct device_attribute *attr, char *buf) +{ + unsigned int bmcflash_val = 0; + int ret = -EIO; + struct sie_cronos_cpld *chip = dev_get_drvdata(dev); + + ret = regmap_read(chip->regmap, CRONOS_CPLD_BMC_BOOT_FLASH_SELECT_REG, &bmcflash_val); + if (ret < 0) + return ret; + + return snprintf(buf, PAGE_SIZE, "0x%02x\n", bmcflash_val); +} + +static ssize_t bmc_flash_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t len) +{ + u8 val = 0; + int ret = -EIO; + struct sie_cronos_cpld *chip = dev_get_drvdata(dev); + + if (kstrtou8(buf, 0, &val)) + return -EINVAL; + + ret = regmap_write(chip->regmap, CRONOS_CPLD_BMC_BOOT_FLASH_SELECT_REG, val); + if (ret) { + dev_err(dev, "Failed to write value 0x%02x to address 0x%02x", + val, CRONOS_CPLD_BMC_BOOT_FLASH_SELECT_REG); + return ret; + } + return len; +} + + +static ssize_t switch_reset_show(struct device *dev, struct device_attribute *attr, char *buf) +{ + unsigned int switchreset_val = 0; + int ret = -EIO; + struct sie_cronos_cpld *chip = dev_get_drvdata(dev); + + ret = regmap_read(chip->regmap, CRONOS_CPLD_SWITCH_RESET_CMD_REG, &switchreset_val); + if (ret < 0) + return ret; + + return snprintf(buf, PAGE_SIZE, "0x%02x\n", switchreset_val); +} + +static ssize_t switch_reset_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t len) +{ + unsigned int switchreset_val = 0; + u8 val = -EINVAL; + int ret = -EIO; + struct sie_cronos_cpld *chip = dev_get_drvdata(dev); + + if (kstrtou8(buf, 0, &val)) + return -EINVAL; + + if (val != 1) + return -EINVAL; + + ret = regmap_read(chip->regmap, CRONOS_CPLD_SWITCH_RESET_CMD_REG, &switchreset_val); + if (ret < 0) + return ret; + + ret = regmap_write(chip->regmap, CRONOS_CPLD_SWITCH_RESET_CMD_REG, switchreset_val); + if (ret) { + dev_err(dev, "Failed to write value 0x%02x to address 0x%02x", + switchreset_val, CRONOS_CPLD_SWITCH_RESET_CMD_REG); + return ret; + } + return len; +} + + +static ssize_t switch_flash_show(struct device *dev, struct device_attribute *attr, char *buf) +{ + unsigned int switchflash_val = 0; + int ret = -EIO; + struct sie_cronos_cpld *chip = dev_get_drvdata(dev); + + ret = regmap_read(chip->regmap, CRONOS_CPLD_SWITCH_BOOT_FLASH_SELECT_REG, &switchflash_val); + if (ret < 0) + return ret; + + return snprintf(buf, PAGE_SIZE, "0x%02x\n", switchflash_val); +} + +static ssize_t switch_flash_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t len) +{ + u8 val = 0; + int ret = -EIO; + struct sie_cronos_cpld *chip = dev_get_drvdata(dev); + + if (kstrtou8(buf, 0, &val)) + return -EINVAL; + + ret = regmap_write(chip->regmap, CRONOS_CPLD_SWITCH_BOOT_FLASH_SELECT_REG, val); + if (ret) { + dev_err(dev, "Failed to write value 0x%02x to address 0x%02x", + val, CRONOS_CPLD_SWITCH_BOOT_FLASH_SELECT_REG); + return ret; + } + return len; +} + + +static ssize_t uart_mux_show(struct device *dev, struct device_attribute *attr, char *buf) +{ + unsigned int uartmux_val = 0; + int ret = -EIO; + struct sie_cronos_cpld *chip = dev_get_drvdata(dev); + + ret = regmap_read(chip->regmap, CRONOS_CPLD_UART_MUX_REG, &uartmux_val); + if (ret < 0) + return ret; + + return snprintf(buf, PAGE_SIZE, "0x%02x\n", uartmux_val); +} + +static ssize_t uart_mux_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t len) +{ + u8 val = 0; + int ret = -EIO; + struct sie_cronos_cpld *chip = dev_get_drvdata(dev); + + if (kstrtou8(buf, 0, &val)) + return -EINVAL; + + ret = regmap_write(chip->regmap, CRONOS_CPLD_UART_MUX_REG, val); + if (ret) { + dev_err(dev, "Failed to write value 0x%02x to address 0x%02x", + val, CRONOS_CPLD_UART_MUX_REG); + return ret; + } + return len; +} + + +static ssize_t led_get_brightness(struct sie_cronos_cpld *chip, unsigned int reg, char *buf) +{ + unsigned int brightness_val; + int ret = -EIO; + + ret = regmap_read(chip->regmap, reg, &brightness_val); + if (ret != 0) + return ret; + + return snprintf(buf, PAGE_SIZE, "0x%02x\n", brightness_val); +} + +static ssize_t led_set_brightness(struct sie_cronos_cpld *chip, unsigned int reg, const char *buf, + size_t len) +{ + u8 val = 0; + int ret = -EIO; + + if (kstrtou8(buf, 0, &val)) + return -EINVAL; + + ret = regmap_update_bits(chip->regmap, reg, CRONOS_CPLD_LEDS_BRIGHTNESS_SET_MASK, val); + if (ret) { + dev_err(chip->dev, "Failed to write value 0x%02x to address 0x%02x", val, reg); + return ret; + } + return len; +} + +static ssize_t brightness_red_show(struct device *dev, struct device_attribute *attr, char *buf) +{ + struct sie_cronos_cpld *chip = dev_get_drvdata(dev); + + return led_get_brightness(chip, CRONOS_CPLD_BRIGHTNESS_RED_REG, buf); +} + +static ssize_t brightness_red_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t len) +{ + struct sie_cronos_cpld *chip = dev_get_drvdata(dev); + + return led_set_brightness(chip, CRONOS_CPLD_BRIGHTNESS_RED_REG, buf, len); +} + +static ssize_t brightness_green_show(struct device *dev, struct device_attribute *attr, char *buf) +{ + struct sie_cronos_cpld *chip = dev_get_drvdata(dev); + + return led_get_brightness(chip, CRONOS_CPLD_BRIGHTNESS_GREEN_REG, buf); +} + +static ssize_t brightness_green_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t len) +{ + struct sie_cronos_cpld *chip = dev_get_drvdata(dev); + + return led_set_brightness(chip, CRONOS_CPLD_BRIGHTNESS_GREEN_REG, buf, len); +} + +static ssize_t brightness_blue_show(struct device *dev, struct device_attribute *attr, char *buf) +{ + struct sie_cronos_cpld *chip = dev_get_drvdata(dev); + + return led_get_brightness(chip, CRONOS_CPLD_BRIGHTNESS_BLUE_REG, buf); +} + +static ssize_t brightness_blue_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t len) +{ + struct sie_cronos_cpld *chip = dev_get_drvdata(dev); + + return led_set_brightness(chip, CRONOS_CPLD_BRIGHTNESS_BLUE_REG, buf, len); +} + + +static ssize_t revision_show(struct device *dev, struct device_attribute *attr, char *buf) +{ + u16 revision = 0; + int ret = -EIO; + struct sie_cronos_cpld *chip = dev_get_drvdata(dev); + + ret = regmap_bulk_read(chip->regmap, CRONOS_CPLD_REVISION_LOW_REG, &revision, 2); + if (ret) + return -EIO; + + return snprintf(buf, PAGE_SIZE, "0x%04x\n", revision); +} + +static ssize_t device_id_show(struct device *dev, struct device_attribute *attr, char *buf) +{ + u16 device_id = 0; + int ret = -EIO; + struct sie_cronos_cpld *chip = dev_get_drvdata(dev); + + ret = regmap_bulk_read(chip->regmap, CRONOS_CPLD_DEVICE_ID_LOW_REG, &device_id, 2); + if (ret) + return -EIO; + + return snprintf(buf, PAGE_SIZE, "0x%04x\n", device_id); +} + +static ssize_t bmc_mac_show(struct device *dev, struct device_attribute *attr, char *buf) +{ + u8 bmc_mac[6]; + int ret = -EIO; + struct sie_cronos_cpld *chip = dev_get_drvdata(dev); + + ret = regmap_bulk_read(chip->regmap, CRONOS_CPLD_BMC_MAC_LOW_REG, bmc_mac, 6); + if (ret) + return -EIO; + + return snprintf(buf, PAGE_SIZE, "%pM\n", bmc_mac); +} + +static ssize_t status_2_show(struct device *dev, struct device_attribute *attr, char *buf) +{ + unsigned int last_boot = 0; + int ret = -EIO; + struct sie_cronos_cpld *chip = dev_get_drvdata(dev); + + ret = regmap_read(chip->regmap, CRONOS_CPLD_STATUS_2_REG, &last_boot); + if (ret < 0) + return ret; + + return snprintf(buf, PAGE_SIZE, "0x%02x\n", last_boot); +} + + +static DEVICE_ATTR_RO(revision); +static DEVICE_ATTR_RO(device_id); +static DEVICE_ATTR_RO(bmc_mac); +static DEVICE_ATTR_RO(status_2); + +static DEVICE_ATTR_RW(uart_mux); +static DEVICE_ATTR_RW(switch_flash); +static DEVICE_ATTR_RW(switch_reset); +static DEVICE_ATTR_RW(bmc_flash); +static DEVICE_ATTR_RW(payload_power); + +static DEVICE_ATTR_RW(brightness_red); +static DEVICE_ATTR_RW(brightness_green); +static DEVICE_ATTR_RW(brightness_blue); +static struct attribute *cronos_cpld_sysfs_entries[] = { + &dev_attr_revision.attr, + &dev_attr_device_id.attr, + &dev_attr_bmc_mac.attr, + &dev_attr_status_2.attr, + &dev_attr_uart_mux.attr, + &dev_attr_switch_flash.attr, + &dev_attr_switch_reset.attr, + &dev_attr_bmc_flash.attr, + &dev_attr_payload_power.attr, + &dev_attr_brightness_red.attr, + &dev_attr_brightness_green.attr, + &dev_attr_brightness_blue.attr, + NULL, +}; + +static const struct attribute_group cronos_cpld_attr_group = { + .attrs = cronos_cpld_sysfs_entries, +}; + +static int sie_cronos_get_device_type(struct sie_cronos_cpld *chip) +{ + int device_id; + int byte; + int ret; + + ret = regmap_read(chip->regmap, CRONOS_CPLD_DEVICE_ID_HIGH_REG, &byte); + if (ret < 0) { + dev_err(chip->dev, "Cannot read chip ID.\n"); + return -EIO; + } + device_id = byte << 8; + ret = regmap_read(chip->regmap, CRONOS_CPLD_DEVICE_ID_LOW_REG, &byte); + if (ret < 0) { + dev_err(chip->dev, "Cannot read chip ID.\n"); + return -EIO; + } + device_id |= byte; + if (device_id != CRONOS_CPLD_DEVICE_ID) { + dev_err(chip->dev, "Invalid device ID: 0x%04x\n", device_id); + return -ENODEV; + } + + dev_info(chip->dev, + "Device detected (device-ID: 0x%04X)\n", + device_id); + + return ret; +} + +static bool cronos_cpld_is_writeable_reg(struct device *dev, unsigned int reg) +{ + switch (reg) { + case CRONOS_CPLD_BRIGHTNESS_RED_REG: + case CRONOS_CPLD_BRIGHTNESS_GREEN_REG: + case CRONOS_CPLD_BRIGHTNESS_BLUE_REG: + case CRONOS_LEDS_SMC_STATUS_REG: + case CRONOS_LEDS_SWITCH_STATUS_REG: + case CRONOS_LEDS_CCM1_STATUS_REG: + case CRONOS_LEDS_CCM2_STATUS_REG: + case CRONOS_LEDS_CCM3_STATUS_REG: + case CRONOS_LEDS_CCM4_STATUS_REG: + case CRONOS_LEDS_CCM_POWER_REG: + + case CRONOS_WDT_CTL_REG: + case CRONOS_WDT_CLR_REG: + + case CRONOS_CPLD_UART_MUX_REG: + case CRONOS_CPLD_SWITCH_BOOT_FLASH_SELECT_REG: + case CRONOS_CPLD_SWITCH_RESET_CMD_REG: + case CRONOS_CPLD_BMC_BOOT_FLASH_SELECT_REG: + case CRONOS_CPLD_PAYLOAD_POWER_CTL_REG: + return true; + default: + return false; + } +} + +static bool cronos_cpld_is_readable_reg(struct device *dev, unsigned int reg) +{ + switch (reg) { + case CRONOS_CPLD_REVISION_HIGH_REG: + case CRONOS_CPLD_REVISION_LOW_REG: + case CRONOS_CPLD_DEVICE_ID_HIGH_REG: + case CRONOS_CPLD_DEVICE_ID_LOW_REG: + + case CRONOS_CPLD_BRIGHTNESS_RED_REG: + case CRONOS_CPLD_BRIGHTNESS_GREEN_REG: + case CRONOS_CPLD_BRIGHTNESS_BLUE_REG: + case CRONOS_LEDS_SMC_STATUS_REG: + case CRONOS_LEDS_SWITCH_STATUS_REG: + case CRONOS_LEDS_CCM1_STATUS_REG: + case CRONOS_LEDS_CCM2_STATUS_REG: + case CRONOS_LEDS_CCM3_STATUS_REG: + case CRONOS_LEDS_CCM4_STATUS_REG: + case CRONOS_LEDS_CCM_POWER_REG: + + case CRONOS_WDT_CTL_REG: + case CRONOS_WDT_CLR_REG: + + case CRONOS_CPLD_STATUS_2_REG: + case CRONOS_CPLD_UART_MUX_REG: + case CRONOS_CPLD_SWITCH_BOOT_FLASH_SELECT_REG: + case CRONOS_CPLD_SWITCH_RESET_CMD_REG: + case CRONOS_CPLD_BMC_BOOT_FLASH_SELECT_REG: + case CRONOS_CPLD_PAYLOAD_POWER_CTL_REG: + + case CRONOS_CPLD_BMC_MAC_LOW_REG ... CRONOS_CPLD_BMC_MAC_HIGH_REG: + return true; + default: + return false; + } +} + +static bool cronos_cpld_is_volatile_reg(struct device *dev, unsigned int reg) +{ + switch (reg) { + case CRONOS_CPLD_REVISION_HIGH_REG: + case CRONOS_CPLD_REVISION_LOW_REG: + + case CRONOS_CPLD_SWITCH_BOOT_FLASH_SELECT_REG: + case CRONOS_CPLD_SWITCH_RESET_CMD_REG: + case CRONOS_CPLD_BMC_BOOT_FLASH_SELECT_REG: + case CRONOS_CPLD_PAYLOAD_POWER_CTL_REG: + + case CRONOS_WDT_CTL_REG: + case CRONOS_WDT_CLR_REG: + return true; + default: + return false; + } +} + +static struct regmap_config cronos_cpld_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + .max_register = CRONOS_CPLD_REVISION_HIGH_REG, + .writeable_reg = cronos_cpld_is_writeable_reg, + .readable_reg = cronos_cpld_is_readable_reg, + .volatile_reg = cronos_cpld_is_volatile_reg, + .use_single_read = true, + .use_single_write = true, + .cache_type = REGCACHE_RBTREE, +}; + +static const struct of_device_id cronos_cpld_dt_ids[] = { + { .compatible = "sie,cronos-cpld", }, + { } +}; +MODULE_DEVICE_TABLE(of, cronos_cpld_dt_ids); + +static int sie_cronos_i2c_probe(struct i2c_client *i2c) +{ + struct sie_cronos_cpld *chip; + const struct of_device_id *match; + const struct mfd_cell *cell; + const struct regmap_config *config; + int cell_num; + int ret; + + chip = devm_kzalloc(&i2c->dev, sizeof(*chip), GFP_KERNEL); + if (!chip) + return -ENOMEM; + + if (i2c->dev.of_node) { + match = of_match_node(cronos_cpld_dt_ids, i2c->dev.of_node); + if (!match) + return -EINVAL; + } + + i2c_set_clientdata(i2c, chip); + chip->dev = &i2c->dev; + + cell = cronos_cpld_devs; + cell_num = ARRAY_SIZE(cronos_cpld_devs); + config = &cronos_cpld_regmap_config; + + chip->regmap = devm_regmap_init_i2c(i2c, config); + if (IS_ERR(chip->regmap)) { + ret = PTR_ERR(chip->regmap); + dev_err(chip->dev, "Failed to allocate register map: %d\n", + ret); + return ret; + } + + ret = sie_cronos_get_device_type(chip); + if (ret) + return ret; + + ret = mfd_add_devices(chip->dev, PLATFORM_DEVID_NONE, cell, + cell_num, NULL, 0, NULL); + if (ret) { + dev_err(chip->dev, "Cannot register child devices\n"); + return ret; + } + + /* Add sysfs */ + ret = sysfs_create_group(&chip->dev->kobj, &cronos_cpld_attr_group); + if (ret) + dev_err(chip->dev, "Failed to create sysfs entries\n"); + + return ret; +} + +static void sie_cronos_i2c_remove(struct i2c_client *i2c) +{ + struct sie_cronos_cpld *chip = i2c_get_clientdata(i2c); + + sysfs_remove_group(&chip->dev->kobj, &cronos_cpld_attr_group); + mfd_remove_devices(chip->dev); +} + +static struct i2c_driver sie_cronos_i2c_driver = { + .driver = { + .name = "sie-cronos", + .of_match_table = of_match_ptr(cronos_cpld_dt_ids), + }, + .probe = sie_cronos_i2c_probe, + .remove = sie_cronos_i2c_remove, +}; + +module_i2c_driver(sie_cronos_i2c_driver); + +MODULE_DESCRIPTION("Core device driver for SIE Cronos CPLDs"); +MODULE_AUTHOR("Raptor Engineering, LLC "); +MODULE_LICENSE("GPL"); diff --git a/include/linux/mfd/sie/cronos/core.h b/include/linux/mfd/sie/cronos/core.h new file mode 100644 index 000000000000..a2fcc48012d8 --- /dev/null +++ b/include/linux/mfd/sie/cronos/core.h @@ -0,0 +1,17 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * Copyright (C) 2015-2017 Dialog Semiconductor + * Copyright (C) 2022 Raptor Engineering, LLC + */ + +#ifndef __MFD_SIE_CRONOS_CORE_H__ +#define __MFD_SIE_CRONOS_CORE_H__ + +#include + +struct sie_cronos_cpld { + struct device *dev; + struct regmap *regmap; +}; + +#endif /* __MFD_SIE_CRONOS_H__ */ diff --git a/include/linux/mfd/sie/cronos/registers.h b/include/linux/mfd/sie/cronos/registers.h new file mode 100644 index 000000000000..e70f5ec038cc --- /dev/null +++ b/include/linux/mfd/sie/cronos/registers.h @@ -0,0 +1,59 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * Copyright (C) 2015-2017 Dialog Semiconductor + * Copyright (C) 2022 Raptor Engineering, LLC + */ + +#ifndef __SIE_CRONOS_H__ +#define __SIE_CRONOS_H__ + +#define CRONOS_CPLD_DEVICE_ID 0x0134 + +/* + * Registers and control masks / values + */ + +#define CRONOS_CPLD_REVISION_HIGH_REG 0x73 +#define CRONOS_CPLD_REVISION_LOW_REG 0x72 +#define CRONOS_CPLD_DEVICE_ID_HIGH_REG 0x71 +#define CRONOS_CPLD_DEVICE_ID_LOW_REG 0x70 + +#define CRONOS_CPLD_BRIGHTNESS_RED_REG 0x17 +#define CRONOS_CPLD_BRIGHTNESS_GREEN_REG 0x18 +#define CRONOS_CPLD_BRIGHTNESS_BLUE_REG 0x19 + +#define CRONOS_CPLD_LEDS_BRIGHTNESS_SET_MASK 0x7F +#define CRONOS_LEDS_MAX_BRIGHTNESS 0x7F + +#define CRONOS_LEDS_SMC_STATUS_REG 0x10 +#define CRONOS_LEDS_SWITCH_STATUS_REG 0x11 + +#define CRONOS_LEDS_CCM1_STATUS_REG 0x15 +#define CRONOS_LEDS_CCM2_STATUS_REG 0x13 +#define CRONOS_LEDS_CCM3_STATUS_REG 0x12 +#define CRONOS_LEDS_CCM4_STATUS_REG 0x14 + +#define CRONOS_LEDS_CCM_POWER_REG 0x16 + +#define CRONOS_CPLD_UART_MUX_REG 0x0e +#define CRONOS_CPLD_SWITCH_BOOT_FLASH_SELECT_REG 0x00 +#define CRONOS_CPLD_SWITCH_RESET_CMD_REG 0x01 +#define CRONOS_CPLD_BMC_BOOT_FLASH_SELECT_REG 0x02 +#define CRONOS_CPLD_PAYLOAD_POWER_CTL_REG 0x0a +#define CRONOS_CPLD_BMC_MAC_LOW_REG 0x30 +#define CRONOS_CPLD_BMC_MAC_HIGH_REG 0x35 + +#define CRONOS_WDT_CLR_REG 0x03 +#define CRONOS_WDT_CTL_REG 0x0c + +#define CRONOS_CPLD_STATUS_2_REG 0x05 + +#define CRONOS_WDT_CLR_VAL 0xc3 +#define CRONOS_WDT_ENABLE_MASK 0x80 +#define CRONOS_WDT_ENABLE_VAL 0x80 +#define CRONOS_WDT_DISABLE_VAL 0x00 +#define CRONOS_WDT_TIMEOUT_MASK 0x07 +#define CRONOS_WDT_CTL_RESET_VAL 0x00 + + +#endif /* __SIE_CRONOS_H__ */