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Wysocki" , Lee Jones , Shawn Guo , Sascha Hauer , Fabio Estevam , Dong Aisheng , Jacky Bai Cc: linux-gpio@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, NXP S32 Linux Team , Christophe Lizzi , Alberto Ruiz , Enric Balletbo , Pengutronix Kernel Team , imx@lists.linux.dev, Andrei Stefanescu Subject: [PATCH v6 2/7] mfd: nxp-siul2: add support for NXP SIUL2 Date: Wed, 13 Nov 2024 12:10:54 +0200 Message-ID: <20241113101124.1279648-3-andrei.stefanescu@oss.nxp.com> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20241113101124.1279648-1-andrei.stefanescu@oss.nxp.com> References: <20241113101124.1279648-1-andrei.stefanescu@oss.nxp.com> X-ClientProxiedBy: AM8P251CA0005.EURP251.PROD.OUTLOOK.COM (2603:10a6:20b:21b::10) To AM9PR04MB8487.eurprd04.prod.outlook.com (2603:10a6:20b:41a::6) Precedence: bulk X-Mailing-List: linux-gpio@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: AM9PR04MB8487:EE_|PA2PR04MB10129:EE_ X-MS-Office365-Filtering-Correlation-Id: c6591fdf-9b8e-41bb-99e7-08dd03cbb1fa X-MS-Exchange-SharedMailbox-RoutingAgent-Processed: True X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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Further commits will add nvmem functionality(a second cell). There are multiple register types in the SIUL2 module: - MIDR (MCU ID Register) * contains information about the SoC. - Interrupt related registers * There are 32 interrupts named EIRQ. An EIRQ may be routed to one or more GPIOs. Not all GPIOs have EIRQs associated with them - MSCR (Multiplexed Signal Configuration Register) * handle pinmuxing and pinconf - IMCR (Input Multiplexed Signal Configuration Register) * are part of pinmuxing - PGPDO/PGPDI (Parallel GPIO Pad Data Out/In Register) * Write/Read the GPIO value There are two SIUL2 modules in the S32G SoC. This driver handles both because functionality is shared between them. For example: some GPIOs in SIUL2_0 have interrupt capability but the registers configuring this are in SIUL2_1. Signed-off-by: Andrei Stefanescu --- drivers/mfd/Kconfig | 12 + drivers/mfd/Makefile | 1 + drivers/mfd/nxp-siul2.c | 410 ++++++++++++++++++++++++++++++++++ include/linux/mfd/nxp-siul2.h | 55 +++++ 4 files changed, 478 insertions(+) create mode 100644 drivers/mfd/nxp-siul2.c create mode 100644 include/linux/mfd/nxp-siul2.h diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig index f9325bcce1b9..fc590789e8b3 100644 --- a/drivers/mfd/Kconfig +++ b/drivers/mfd/Kconfig @@ -1098,6 +1098,18 @@ config MFD_NTXEC certain e-book readers designed by the original design manufacturer Netronix. +config MFD_NXP_SIUL2 + tristate "NXP SIUL2 MFD driver" + select MFD_CORE + select REGMAP_MMIO + depends on ARCH_S32 || COMPILE_TEST + help + Select this to get support for the NXP SIUL2 (System Integration + Unit Lite) module. This hardware block contains registers for + SoC information, pinctrl and GPIO functionality. This will + probe a MFD driver which will contain cells for a combined + pinctrl&GPIO driver and nvmem drivers for the SoC information. + config MFD_RETU tristate "Nokia Retu and Tahvo multi-function device" select MFD_CORE diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile index 2a9f91e81af8..7b19ea014221 100644 --- a/drivers/mfd/Makefile +++ b/drivers/mfd/Makefile @@ -226,6 +226,7 @@ obj-$(CONFIG_MFD_INTEL_PMC_BXT) += intel_pmc_bxt.o obj-$(CONFIG_MFD_PALMAS) += palmas.o obj-$(CONFIG_MFD_VIPERBOARD) += viperboard.o obj-$(CONFIG_MFD_NTXEC) += ntxec.o +obj-$(CONFIG_MFD_NXP_SIUL2) += nxp-siul2.o obj-$(CONFIG_MFD_RC5T583) += rc5t583.o rc5t583-irq.o obj-$(CONFIG_MFD_RK8XX) += rk8xx-core.o obj-$(CONFIG_MFD_RK8XX_I2C) += rk8xx-i2c.o diff --git a/drivers/mfd/nxp-siul2.c b/drivers/mfd/nxp-siul2.c new file mode 100644 index 000000000000..7751992e4df3 --- /dev/null +++ b/drivers/mfd/nxp-siul2.c @@ -0,0 +1,410 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * SIUL2(System Integration Unit Lite) MFD driver + * + * Copyright 2024 NXP + */ +#include +#include +#include +#include +#include + +#define S32G_NUM_SIUL2 2 + +#define S32_REG_RANGE(start, end, name, access) \ + { \ + .reg_name = (name), \ + .reg_start_offset = (start), \ + .reg_end_offset = (end), \ + .reg_access = (access), \ + .valid = true, \ + } + +#define S32_INVALID_REG_RANGE \ + { \ + .reg_name = NULL, \ + .reg_access = NULL, \ + .valid = false, \ + } + +static const struct mfd_cell nxp_siul2_devs[] = { + { + .name = "s32g-siul2-pinctrl", + } +}; + +/** + * struct nxp_siul2_reg_range_info: a register range in SIUL2 + * @reg_name: the name for the register range + * @reg_start_offset: the first valid register offset + * @reg_end_offset: the last valid register offset + * @reg_access: the read/write access tables if not NULL + * @valid: whether the register range is valid or not + */ +struct nxp_siul2_reg_range_info { + const char *reg_name; + unsigned int reg_start_offset; + unsigned int reg_end_offset; + const struct regmap_access_table *reg_access; + bool valid; +}; + +static const struct regmap_range s32g2_siul2_0_imcr_reg_ranges[] = { + /* IMCR0 - IMCR1 */ + regmap_reg_range(0, 4), + /* IMCR3 - IMCR61 */ + regmap_reg_range(0xC, 0xF4), + /* IMCR68 - IMCR83 */ + regmap_reg_range(0x110, 0x14C) +}; + +static const struct regmap_access_table s32g2_siul2_0_imcr = { + .yes_ranges = s32g2_siul2_0_imcr_reg_ranges, + .n_yes_ranges = ARRAY_SIZE(s32g2_siul2_0_imcr_reg_ranges) +}; + +static const struct regmap_range s32g2_siul2_0_pgpd_reg_ranges[] = { + /* PGPD*0 - PGPD*5 */ + regmap_reg_range(0, 0xA), + /* PGPD*6 - PGPD*6 */ + regmap_reg_range(0xE, 0xE), +}; + +static const struct regmap_access_table s32g2_siul2_0_pgpd = { + .yes_ranges = s32g2_siul2_0_pgpd_reg_ranges, + .n_yes_ranges = ARRAY_SIZE(s32g2_siul2_0_pgpd_reg_ranges) +}; + +static const struct regmap_range s32g2_siul2_1_irq_reg_ranges[] = { + /* DISR0 */ + regmap_reg_range(0x10, 0x10), + /* DIRER0 */ + regmap_reg_range(0x18, 0x18), + /* DIRSR0 */ + regmap_reg_range(0x20, 0x20), + /* IREER0 */ + regmap_reg_range(0x28, 0x28), + /* IFEER0 */ + regmap_reg_range(0x30, 0x30), +}; + +static const struct regmap_access_table s32g2_siul2_1_irq = { + .yes_ranges = s32g2_siul2_1_irq_reg_ranges, + .n_yes_ranges = ARRAY_SIZE(s32g2_siul2_1_irq_reg_ranges), +}; + +static const struct regmap_range s32g2_siul2_1_irq_volatile_reg_range[] = { + /* DISR0 */ + regmap_reg_range(0x10, 0x10) +}; + +static const struct regmap_access_table s32g2_siul2_1_irq_volatile = { + .yes_ranges = s32g2_siul2_1_irq_volatile_reg_range, + .n_yes_ranges = ARRAY_SIZE(s32g2_siul2_1_irq_volatile_reg_range), +}; + +static const struct regmap_range s32g2_siul2_1_mscr_reg_ranges[] = { + /* MSCR112 - MSCR122 */ + regmap_reg_range(0, 0x28), + /* MSCR144 - MSCR190 */ + regmap_reg_range(0x80, 0x138) +}; + +static const struct regmap_access_table s32g2_siul2_1_mscr = { + .yes_ranges = s32g2_siul2_1_mscr_reg_ranges, + .n_yes_ranges = ARRAY_SIZE(s32g2_siul2_1_mscr_reg_ranges), +}; + +static const struct regmap_range s32g2_siul2_1_imcr_reg_ranges[] = { + /* IMCR119 - IMCR121 */ + regmap_reg_range(0, 8), + /* IMCR128 - IMCR129 */ + regmap_reg_range(0x24, 0x28), + /* IMCR143 - IMCR151 */ + regmap_reg_range(0x60, 0x80), + /* IMCR153 - IMCR161 */ + regmap_reg_range(0x88, 0xA8), + /* IMCR205 - IMCR212 */ + regmap_reg_range(0x158, 0x174), + /* IMCR224 - IMCR225 */ + regmap_reg_range(0x1A4, 0x1A8), + /* IMCR233 - IMCR248 */ + regmap_reg_range(0x1C8, 0x204), + /* IMCR273 - IMCR274 */ + regmap_reg_range(0x268, 0x26C), + /* IMCR278 - IMCR281 */ + regmap_reg_range(0x27C, 0x288), + /* IMCR283 - IMCR286 */ + regmap_reg_range(0x290, 0x29C), + /* IMCR288 - IMCR294 */ + regmap_reg_range(0x2A4, 0x2BC), + /* IMCR296 - IMCR302 */ + regmap_reg_range(0x2C4, 0x2DC), + /* IMCR304 - IMCR310 */ + regmap_reg_range(0x2E4, 0x2FC), + /* IMCR312 - IMCR314 */ + regmap_reg_range(0x304, 0x30C), + /* IMCR316 */ + regmap_reg_range(0x314, 0x314), + /* IMCR 318 */ + regmap_reg_range(0x31C, 0x31C), + /* IMCR322 - IMCR340 */ + regmap_reg_range(0x32C, 0x374), + /* IMCR343 - IMCR360 */ + regmap_reg_range(0x380, 0x3C4), + /* IMCR363 - IMCR380 */ + regmap_reg_range(0x3D0, 0x414), + /* IMCR383 - IMCR393 */ + regmap_reg_range(0x420, 0x448), + /* IMCR398 - IMCR433 */ + regmap_reg_range(0x45C, 0x4E8), + /* IMCR467 - IMCR470 */ + regmap_reg_range(0x570, 0x57C), + /* IMCR473 - IMCR475 */ + regmap_reg_range(0x588, 0x590), + /* IMCR478 - IMCR480*/ + regmap_reg_range(0x59C, 0x5A4), + /* IMCR483 - IMCR485 */ + regmap_reg_range(0x5B0, 0x5B8), + /* IMCR488 - IMCR490 */ + regmap_reg_range(0x5C4, 0x5CC), + /* IMCR493 - IMCR495 */ + regmap_reg_range(0x5D8, 0x5E0), +}; + +static const struct regmap_access_table s32g2_siul2_1_imcr = { + .yes_ranges = s32g2_siul2_1_imcr_reg_ranges, + .n_yes_ranges = ARRAY_SIZE(s32g2_siul2_1_imcr_reg_ranges) +}; + +static const struct regmap_range s32g2_siul2_1_pgpd_reg_ranges[] = { + /* PGPD*7 */ + regmap_reg_range(0xC, 0xC), + /* PGPD*9 */ + regmap_reg_range(0x10, 0x10), + /* PDPG*10 - PGPD*11 */ + regmap_reg_range(0x14, 0x16), +}; + +static const struct regmap_access_table s32g2_siul2_1_pgpd = { + .yes_ranges = s32g2_siul2_1_pgpd_reg_ranges, + .n_yes_ranges = ARRAY_SIZE(s32g2_siul2_1_pgpd_reg_ranges) +}; + +static const struct nxp_siul2_reg_range_info +s32g2_reg_ranges[S32G_NUM_SIUL2][SIUL2_NUM_REG_TYPES] = { + /* SIUL2_0 */ + { + [SIUL2_MPIDR] = S32_REG_RANGE(4, 8, "SIUL2_0_MPIDR", NULL), + /* Interrupts are to be controlled from SIUL2_1 */ + [SIUL2_IRQ] = S32_INVALID_REG_RANGE, + [SIUL2_MSCR] = S32_REG_RANGE(0x240, 0x3D4, "SIUL2_0_MSCR", + NULL), + [SIUL2_IMCR] = S32_REG_RANGE(0xA40, 0xB8C, "SIUL2_0_IMCR", + &s32g2_siul2_0_imcr), + [SIUL2_PGPDO] = S32_REG_RANGE(0x1700, 0x170E, + "SIUL2_0_PGPDO", + &s32g2_siul2_0_pgpd), + [SIUL2_PGPDI] = S32_REG_RANGE(0x1740, 0x174E, + "SIUL2_0_PGPDI", + &s32g2_siul2_0_pgpd), + }, + /* SIUL2_1 */ + { + [SIUL2_MPIDR] = S32_REG_RANGE(4, 8, "SIUL2_1_MPIDR", NULL), + [SIUL2_IRQ] = S32_REG_RANGE(0x10, 0xC0, "SIUL2_1_IRQ", + &s32g2_siul2_1_irq), + [SIUL2_MSCR] = S32_REG_RANGE(0x400, 0x538, "SIUL2_1_MSCR", + &s32g2_siul2_1_mscr), + [SIUL2_IMCR] = S32_REG_RANGE(0xC1C, 0x11FC, "SIUL2_1_IMCR", + &s32g2_siul2_1_imcr), + [SIUL2_PGPDO] = S32_REG_RANGE(0x1700, 0x1716, + "SIUL2_1_PGPDO", + &s32g2_siul2_1_pgpd), + [SIUL2_PGPDI] = S32_REG_RANGE(0x1740, 0x1756, + "SIUL2_1_PGPDI", + &s32g2_siul2_1_pgpd), + }, +}; + +static const struct regmap_config nxp_siul2_regmap_irq_conf = { + .val_bits = 32, + .val_format_endian = REGMAP_ENDIAN_LITTLE, + .reg_bits = 32, + .reg_stride = 4, + .cache_type = REGCACHE_FLAT, + .use_raw_spinlock = true, + .volatile_table = &s32g2_siul2_1_irq_volatile, +}; + +static const struct regmap_config nxp_siul2_regmap_generic_conf = { + .val_bits = 32, + .val_format_endian = REGMAP_ENDIAN_LITTLE, + .reg_bits = 32, + .reg_stride = 4, + .cache_type = REGCACHE_FLAT, + .use_raw_spinlock = true, +}; + +static const struct regmap_config nxp_siul2_regmap_pgpdo_conf = { + .val_bits = 16, + .val_format_endian = REGMAP_ENDIAN_LITTLE, + .reg_bits = 32, + .reg_stride = 2, + .cache_type = REGCACHE_FLAT, + .use_raw_spinlock = true, +}; + +static const struct regmap_config nxp_siul2_regmap_pgpdi_conf = { + .val_bits = 16, + .val_format_endian = REGMAP_ENDIAN_LITTLE, + .reg_bits = 32, + .reg_stride = 2, + .cache_type = REGCACHE_NONE, + .use_raw_spinlock = true, +}; + +static int nxp_siul2_init_regmap(struct platform_device *pdev, + void __iomem *base, unsigned int siul) +{ + const struct regmap_config *regmap_configs[SIUL2_NUM_REG_TYPES] = { + [SIUL2_MPIDR] = &nxp_siul2_regmap_generic_conf, + [SIUL2_IRQ] = &nxp_siul2_regmap_irq_conf, + [SIUL2_MSCR] = &nxp_siul2_regmap_generic_conf, + [SIUL2_IMCR] = &nxp_siul2_regmap_generic_conf, + [SIUL2_PGPDO] = &nxp_siul2_regmap_pgpdo_conf, + [SIUL2_PGPDI] = &nxp_siul2_regmap_pgpdi_conf, + }; + const struct nxp_siul2_reg_range_info *tmp_range; + struct regmap_config tmp_conf; + struct nxp_siul2_info *info; + struct nxp_siul2_mfd *priv; + void __iomem *reg_start; + int i; + + priv = platform_get_drvdata(pdev); + info = &priv->siul2[siul]; + + for (i = 0; i < SIUL2_NUM_REG_TYPES; i++) { + if (!s32g2_reg_ranges[siul][i].valid) + continue; + + tmp_range = &s32g2_reg_ranges[siul][i]; + tmp_conf = *regmap_configs[i]; + tmp_conf.name = tmp_range->reg_name; + tmp_conf.max_register = + tmp_range->reg_end_offset - tmp_range->reg_start_offset; + + if (tmp_conf.cache_type != REGCACHE_NONE) + tmp_conf.num_reg_defaults_raw = + tmp_conf.max_register / tmp_conf.reg_stride; + + if (tmp_range->reg_access) { + tmp_conf.wr_table = tmp_range->reg_access; + tmp_conf.rd_table = tmp_range->reg_access; + } + + reg_start = base + tmp_range->reg_start_offset; + info->regmaps[i] = devm_regmap_init_mmio(&pdev->dev, reg_start, + &tmp_conf); + if (IS_ERR(info->regmaps[i])) + return dev_err_probe(&pdev->dev, + PTR_ERR(info->regmaps[i]), + "regmap %d init failed: %ld\n", i, + PTR_ERR(info->regmaps[i])); + } + + return 0; +} + +static int nxp_siul2_parse_dtb(struct platform_device *pdev) +{ + struct device_node *np = pdev->dev.of_node; + struct of_phandle_args pinspec; + struct nxp_siul2_mfd *priv; + void __iomem *base; + char reg_name[16]; + int i, ret; + + priv = platform_get_drvdata(pdev); + + for (i = 0; i < priv->num_siul2; i++) { + ret = snprintf(reg_name, ARRAY_SIZE(reg_name), "siul2%d", i); + if (ret < 0 || ret >= ARRAY_SIZE(reg_name)) + return ret; + + base = devm_platform_ioremap_resource_byname(pdev, reg_name); + if (IS_ERR(base)) + return dev_err_probe(&pdev->dev, PTR_ERR(base), + "Failed to get MEM resource: %s\n", + reg_name); + + ret = nxp_siul2_init_regmap(pdev, base, i); + if (ret) + return ret; + + ret = of_parse_phandle_with_fixed_args(np, "gpio-ranges", 3, + i, &pinspec); + if (ret) + return ret; + + of_node_put(pinspec.np); + + if (pinspec.args_count != 3) + return dev_err_probe(&pdev->dev, -EINVAL, + "Invalid pinspec count: %d\n", + pinspec.args_count); + + priv->siul2[i].gpio_base = pinspec.args[1]; + priv->siul2[i].gpio_num = pinspec.args[2]; + } + + return 0; +} + +static int nxp_siul2_probe(struct platform_device *pdev) +{ + struct nxp_siul2_mfd *priv; + int ret; + + priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + priv->num_siul2 = S32G_NUM_SIUL2; + priv->siul2 = devm_kcalloc(&pdev->dev, priv->num_siul2, + sizeof(*priv->siul2), GFP_KERNEL); + if (!priv->siul2) + return -ENOMEM; + + platform_set_drvdata(pdev, priv); + ret = nxp_siul2_parse_dtb(pdev); + if (ret) + return ret; + + return devm_mfd_add_devices(&pdev->dev, PLATFORM_DEVID_AUTO, + nxp_siul2_devs, ARRAY_SIZE(nxp_siul2_devs), + NULL, 0, NULL); +} + +static const struct of_device_id nxp_siul2_dt_ids[] = { + { .compatible = "nxp,s32g2-siul2" }, + { .compatible = "nxp,s32g3-siul2" }, + { /* sentinel */ }, +}; +MODULE_DEVICE_TABLE(of, nxp_siul2_dt_ids); + +static struct platform_driver nxp_siul2_mfd_driver = { + .driver = { + .name = "nxp-siul2-mfd", + .of_match_table = nxp_siul2_dt_ids, + }, + .probe = nxp_siul2_probe, +}; + +module_platform_driver(nxp_siul2_mfd_driver); + +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("NXP SIUL2 MFD driver"); +MODULE_AUTHOR("Andrei Stefanescu "); diff --git a/include/linux/mfd/nxp-siul2.h b/include/linux/mfd/nxp-siul2.h new file mode 100644 index 000000000000..238c812dba29 --- /dev/null +++ b/include/linux/mfd/nxp-siul2.h @@ -0,0 +1,55 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later + * + * S32 SIUL2 core definitions + * + * Copyright 2024 NXP + */ + +#ifndef __DRIVERS_MFD_NXP_SIUL2_H +#define __DRIVERS_MFD_NXP_SIUL2_H + +#include + +/** + * enum nxp_siul2_reg_type - an enum for SIUL2 reg types + * @SIUL2_MPIDR - SoC info + * @SIUL2_IRQ - IRQ related registers, only valid in SIUL2_1 + * @SIUL2_MSCR - used for pinmuxing and pinconf + * @SIUL2_IMCR - used for pinmuxing + * @SIUL2_PGPDO - writing the GPIO value + * @SIUL2_PGPDI - reading the GPIO value + */ +enum nxp_siul2_reg_type { + SIUL2_MPIDR, + SIUL2_IRQ, + SIUL2_MSCR, + SIUL2_IMCR, + SIUL2_PGPDO, + SIUL2_PGPDI, + + SIUL2_NUM_REG_TYPES +}; + +/** + * struct nxp_siul2_info - details about one SIUL2 hardware instance + * @regmaps: the regmaps for each register type for a SIUL2 hardware instance + * @gpio_base: the first GPIO in this SIUL2 module + * @gpio_num: the number of GPIOs in this SIUL2 module + */ +struct nxp_siul2_info { + struct regmap *regmaps[SIUL2_NUM_REG_TYPES]; + u32 gpio_base; + u32 gpio_num; +}; + +/** + * struct nxp_siul2_mfd - driver data + * @siul2: info about the SIUL2 modules present + * @num_siul2: number of siul2 modules + */ +struct nxp_siul2_mfd { + struct nxp_siul2_info *siul2; + u8 num_siul2; +}; + +#endif /* __DRIVERS_MFD_NXP_SIUL2_H */