[5.10.y-cip,02/14] regulator: Add Renesas PMIC RAA215300 driver

Message ID	20230818092807.159112-3-biju.das.jz@bp.renesas.com (mailing list archive)
State	Accepted
Headers	show Return-Path: <biju.das.jz@bp.renesas.com> ip: 210.160.252.171, mailfrom: biju.das.jz@bp.renesas.com) From: Biju Das <biju.das.jz@bp.renesas.com> To: cip-dev@lists.cip-project.org, Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@toshiba.co.jp>, Pavel Machek <pavel@denx.de> Cc: Biju Das <biju.das.jz@bp.renesas.com>, Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com> Subject: [PATCH 5.10.y-cip 02/14] regulator: Add Renesas PMIC RAA215300 driver Date: Fri, 18 Aug 2023 10:27:55 +0100 Message-Id: <20230818092807.159112-3-biju.das.jz@bp.renesas.com> In-Reply-To: <20230818092807.159112-1-biju.das.jz@bp.renesas.com> References: <20230818092807.159112-1-biju.das.jz@bp.renesas.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit
Series	Add Renesas PMIC RAA215300 driver and builtin RTC support \| expand [5.10.y-cip,00/14] Add Renesas PMIC RAA215300 driver and builtin RTC support [5.10.y-cip,01/14] regulator: dt-bindings: Add Renesas RAA215300 PMIC bindings [5.10.y-cip,02/14] regulator: Add Renesas PMIC RAA215300 driver [5.10.y-cip,03/14] regulator: raa215300: Add build dependency with COMMON_CLK [5.10.y-cip,04/14] rtc: isl1208: quiet maybe-unused variable warning [5.10.y-cip,05/14] dt-bindings: rtc: isl1208: Convert to json-schema [5.10.y-cip,06/14] dt-bindings: rtc: isil,isl1208: Document clock and clock-names properties [5.10.y-cip,07/14] rtc: isl1208: Drop name variable [5.10.y-cip,08/14] rtc: isl1208: Make similar I2C and DT-based matching table [5.10.y-cip,09/14] rtc: isl1208: Drop enum isl1208_id and split isl1208_configs[] [5.10.y-cip,10/14] rtc: isl1208: Add isl1208_set_xtoscb() [5.10.y-cip,11/14] rtc: isl1208: Add support for the built-in RTC on the PMIC RAA215300 [5.10.y-cip,12/14] arm64: defconfig: Enable PMIC RAA215300 and RTC ISL 1208 configs [5.10.y-cip,13/14] arm64: dts: renesas: rzg2l-smarc-som: Enable PMIC and built-in RTC [5.10.y-cip,14/14] arm64: dts: renesas: rzg2lc-smarc-som: Enable PMIC and built-in RTC

diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig index 020a00d6696b..62e4a2719f0f 100644 --- a/drivers/regulator/Kconfig +++ b/drivers/regulator/Kconfig @@ -883,6 +883,13 @@ config REGULATOR_QCOM_USB_VBUS Say M here if you want to include support for enabling the VBUS output as a module. The module will be named "qcom_usb_vbus_regulator". +config REGULATOR_RAA215300 + tristate "Renesas RAA215300 driver" + select REGMAP_I2C + depends on I2C + help + Support for the Renesas RAA215300 PMIC. + config REGULATOR_RASPBERRYPI_TOUCHSCREEN_ATTINY tristate "Raspberry Pi 7-inch touchscreen panel ATTINY regulator" depends on BACKLIGHT_CLASS_DEVICE diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile index 6ebae516258e..25513b52d7dc 100644 --- a/drivers/regulator/Makefile +++ b/drivers/regulator/Makefile @@ -109,6 +109,7 @@ obj-$(CONFIG_REGULATOR_TPS51632) += tps51632-regulator.o obj-$(CONFIG_REGULATOR_PBIAS) += pbias-regulator.o obj-$(CONFIG_REGULATOR_PCAP) += pcap-regulator.o obj-$(CONFIG_REGULATOR_PCF50633) += pcf50633-regulator.o +obj-$(CONFIG_REGULATOR_RAA215300) += raa215300.o obj-$(CONFIG_REGULATOR_RASPBERRYPI_TOUCHSCREEN_ATTINY) += rpi-panel-attiny-regulator.o obj-$(CONFIG_REGULATOR_RC5T583) += rc5t583-regulator.o obj-$(CONFIG_REGULATOR_RK808) += rk808-regulator.o diff --git a/drivers/regulator/raa215300.c b/drivers/regulator/raa215300.c new file mode 100644 index 000000000000..24a1c89f5dbc --- /dev/null +++ b/drivers/regulator/raa215300.c @@ -0,0 +1,190 @@ +// SPDX-License-Identifier: GPL-2.0 +// +// Renesas RAA215300 PMIC driver +// +// Copyright (C) 2023 Renesas Electronics Corporation +// + +#include <linux/clk.h> +#include <linux/clkdev.h> +#include <linux/clk-provider.h> +#include <linux/err.h> +#include <linux/i2c.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/regmap.h> + +#define RAA215300_FAULT_LATCHED_STATUS_1 0x59 +#define RAA215300_FAULT_LATCHED_STATUS_2 0x5a +#define RAA215300_FAULT_LATCHED_STATUS_3 0x5b +#define RAA215300_FAULT_LATCHED_STATUS_4 0x5c +#define RAA215300_FAULT_LATCHED_STATUS_6 0x5e + +#define RAA215300_INT_MASK_1 0x64 +#define RAA215300_INT_MASK_2 0x65 +#define RAA215300_INT_MASK_3 0x66 +#define RAA215300_INT_MASK_4 0x67 +#define RAA215300_INT_MASK_6 0x68 + +#define RAA215300_REG_BLOCK_EN 0x6c +#define RAA215300_HW_REV 0xf8 + +#define RAA215300_INT_MASK_1_ALL GENMASK(5, 0) +#define RAA215300_INT_MASK_2_ALL GENMASK(3, 0) +#define RAA215300_INT_MASK_3_ALL GENMASK(5, 0) +#define RAA215300_INT_MASK_4_ALL BIT(0) +#define RAA215300_INT_MASK_6_ALL GENMASK(7, 0) + +#define RAA215300_REG_BLOCK_EN_RTC_EN BIT(6) +#define RAA215300_RTC_DEFAULT_ADDR 0x6f + +const char *clkin_name = "clkin"; +const char *xin_name = "xin"; +static struct clk *clk; + +static const struct regmap_config raa215300_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + .max_register = 0xff, +}; + +static void raa215300_rtc_unregister_device(void *data) +{ + i2c_unregister_device(data); + if (!clk) { + clk_unregister_fixed_rate(clk); + clk = NULL; + } +} + +static int raa215300_clk_present(struct i2c_client *client, const char *name) +{ + struct clk *clk; + + clk = devm_clk_get_optional(&client->dev, name); + if (IS_ERR(clk)) + return PTR_ERR(clk); + + return !!clk; +} + +static int raa215300_i2c_probe(struct i2c_client *client) +{ + struct device *dev = &client->dev; + const char *clk_name = xin_name; + unsigned int pmic_version, val; + struct regmap *regmap; + int ret; + + regmap = devm_regmap_init_i2c(client, &raa215300_regmap_config); + if (IS_ERR(regmap)) + return dev_err_probe(dev, PTR_ERR(regmap), + "regmap i2c init failed\n"); + + ret = regmap_read(regmap, RAA215300_HW_REV, &pmic_version); + if (ret < 0) + return dev_err_probe(dev, ret, "HW rev read failed\n"); + + dev_dbg(dev, "RAA215300 PMIC version 0x%04x\n", pmic_version); + + /* Clear all blocks except RTC, if enabled */ + regmap_read(regmap, RAA215300_REG_BLOCK_EN, &val); + val &= RAA215300_REG_BLOCK_EN_RTC_EN; + regmap_write(regmap, RAA215300_REG_BLOCK_EN, val); + + /*Clear the latched registers */ + regmap_read(regmap, RAA215300_FAULT_LATCHED_STATUS_1, &val); + regmap_write(regmap, RAA215300_FAULT_LATCHED_STATUS_1, val); + regmap_read(regmap, RAA215300_FAULT_LATCHED_STATUS_2, &val); + regmap_write(regmap, RAA215300_FAULT_LATCHED_STATUS_2, val); + regmap_read(regmap, RAA215300_FAULT_LATCHED_STATUS_3, &val); + regmap_write(regmap, RAA215300_FAULT_LATCHED_STATUS_3, val); + regmap_read(regmap, RAA215300_FAULT_LATCHED_STATUS_4, &val); + regmap_write(regmap, RAA215300_FAULT_LATCHED_STATUS_4, val); + regmap_read(regmap, RAA215300_FAULT_LATCHED_STATUS_6, &val); + regmap_write(regmap, RAA215300_FAULT_LATCHED_STATUS_6, val); + + /* Mask all the PMIC interrupts */ + regmap_write(regmap, RAA215300_INT_MASK_1, RAA215300_INT_MASK_1_ALL); + regmap_write(regmap, RAA215300_INT_MASK_2, RAA215300_INT_MASK_2_ALL); + regmap_write(regmap, RAA215300_INT_MASK_3, RAA215300_INT_MASK_3_ALL); + regmap_write(regmap, RAA215300_INT_MASK_4, RAA215300_INT_MASK_4_ALL); + regmap_write(regmap, RAA215300_INT_MASK_6, RAA215300_INT_MASK_6_ALL); + + ret = raa215300_clk_present(client, xin_name); + if (ret < 0) { + return ret; + } else if (!ret) { + ret = raa215300_clk_present(client, clkin_name); + if (ret < 0) + return ret; + + clk_name = clkin_name; + } + + if (ret) { + char *name = pmic_version >= 0x12 ? "isl1208" : "raa215300_a0"; + struct device_node *np = client->dev.of_node; + u32 addr = RAA215300_RTC_DEFAULT_ADDR; + struct i2c_board_info info = {}; + struct i2c_client *rtc_client; + ssize_t size; + + clk = clk_register_fixed_rate(NULL, clk_name, NULL, 0, 32000); + clk_register_clkdev(clk, clk_name, NULL); + + if (np) { + int i; + + i = of_property_match_string(np, "reg-names", "rtc"); + if (i >= 0) + of_property_read_u32_index(np, "reg", i, &addr); + } + + info.addr = addr; + if (client->irq > 0) + info.irq = client->irq; + + size = strscpy(info.type, name, sizeof(info.type)); + if (size < 0) + return dev_err_probe(dev, size, + "Invalid device name: %s\n", name); + + /* Enable RTC block */ + regmap_update_bits(regmap, RAA215300_REG_BLOCK_EN, + RAA215300_REG_BLOCK_EN_RTC_EN, + RAA215300_REG_BLOCK_EN_RTC_EN); + + rtc_client = i2c_new_client_device(client->adapter, &info); + if (IS_ERR(rtc_client)) + return PTR_ERR(rtc_client); + + ret = devm_add_action_or_reset(dev, + raa215300_rtc_unregister_device, + rtc_client); + if (ret < 0) + return ret; + } + + return 0; +} + +static const struct of_device_id raa215300_dt_match[] = { + { .compatible = "renesas,raa215300" }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, raa215300_dt_match); + +static struct i2c_driver raa215300_i2c_driver = { + .driver = { + .name = "raa215300", + .of_match_table = raa215300_dt_match, + }, + .probe_new = raa215300_i2c_probe, +}; +module_i2c_driver(raa215300_i2c_driver); + +MODULE_DESCRIPTION("Renesas RAA215300 PMIC driver"); +MODULE_AUTHOR("Fabrizio Castro <fabrizio.castro.jz@renesas.com>"); +MODULE_AUTHOR("Biju Das <biju.das.jz@bp.renesas.com>"); +MODULE_LICENSE("GPL");

[5.10.y-cip,02/14] regulator: Add Renesas PMIC RAA215300 driver

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