| // SPDX-License-Identifier: GPL-2.0 | |
| /* | |
| * Pin Control and GPIO driver for SuperH Pin Function Controller. | |
| * | |
| * Authors: Magnus Damm, Paul Mundt, Laurent Pinchart | |
| * | |
| * Copyright (C) 2008 Magnus Damm | |
| * Copyright (C) 2009 - 2012 Paul Mundt | |
| */ | |
| #define DRV_NAME "sh-pfc" | |
| #include <linux/bitops.h> | |
| #include <linux/err.h> | |
| #include <linux/errno.h> | |
| #include <linux/init.h> | |
| #include <linux/io.h> | |
| #include <linux/ioport.h> | |
| #include <linux/kernel.h> | |
| #include <linux/math.h> | |
| #include <linux/of.h> | |
| #include <linux/of_device.h> | |
| #include <linux/pinctrl/machine.h> | |
| #include <linux/platform_device.h> | |
| #include <linux/psci.h> | |
| #include <linux/slab.h> | |
| #include <linux/sys_soc.h> | |
| #include "core.h" | |
| static int sh_pfc_map_resources(struct sh_pfc *pfc, | |
| struct platform_device *pdev) | |
| { | |
| struct sh_pfc_window *windows; | |
| unsigned int *irqs = NULL; | |
| unsigned int num_windows; | |
| struct resource *res; | |
| unsigned int i; | |
| int num_irqs; | |
| /* Count the MEM and IRQ resources. */ | |
| for (num_windows = 0;; num_windows++) { | |
| res = platform_get_resource(pdev, IORESOURCE_MEM, num_windows); | |
| if (!res) | |
| break; | |
| } | |
| if (num_windows == 0) | |
| return -EINVAL; | |
| num_irqs = platform_irq_count(pdev); | |
| if (num_irqs < 0) | |
| return num_irqs; | |
| /* Allocate memory windows and IRQs arrays. */ | |
| windows = devm_kcalloc(pfc->dev, num_windows, sizeof(*windows), | |
| GFP_KERNEL); | |
| if (windows == NULL) | |
| return -ENOMEM; | |
| pfc->num_windows = num_windows; | |
| pfc->windows = windows; | |
| if (num_irqs) { | |
| irqs = devm_kcalloc(pfc->dev, num_irqs, sizeof(*irqs), | |
| GFP_KERNEL); | |
| if (irqs == NULL) | |
| return -ENOMEM; | |
| pfc->num_irqs = num_irqs; | |
| pfc->irqs = irqs; | |
| } | |
| /* Fill them. */ | |
| for (i = 0; i < num_windows; i++) { | |
| windows->virt = devm_platform_get_and_ioremap_resource(pdev, i, &res); | |
| if (IS_ERR(windows->virt)) | |
| return -ENOMEM; | |
| windows->phys = res->start; | |
| windows->size = resource_size(res); | |
| windows++; | |
| } | |
| for (i = 0; i < num_irqs; i++) | |
| *irqs++ = platform_get_irq(pdev, i); | |
| return 0; | |
| } | |
| static void __iomem *sh_pfc_phys_to_virt(struct sh_pfc *pfc, u32 reg) | |
| { | |
| struct sh_pfc_window *window; | |
| phys_addr_t address = reg; | |
| unsigned int i; | |
| /* scan through physical windows and convert address */ | |
| for (i = 0; i < pfc->num_windows; i++) { | |
| window = pfc->windows + i; | |
| if (address < window->phys) | |
| continue; | |
| if (address >= (window->phys + window->size)) | |
| continue; | |
| return window->virt + (address - window->phys); | |
| } | |
| BUG(); | |
| return NULL; | |
| } | |
| int sh_pfc_get_pin_index(struct sh_pfc *pfc, unsigned int pin) | |
| { | |
| unsigned int offset; | |
| unsigned int i; | |
| for (i = 0, offset = 0; i < pfc->nr_ranges; ++i) { | |
| const struct sh_pfc_pin_range *range = &pfc->ranges[i]; | |
| if (pin <= range->end) | |
| return pin >= range->start | |
| ? offset + pin - range->start : -1; | |
| offset += range->end - range->start + 1; | |
| } | |
| return -EINVAL; | |
| } | |
| static int sh_pfc_enum_in_range(u16 enum_id, const struct pinmux_range *r) | |
| { | |
| if (enum_id < r->begin) | |
| return 0; | |
| if (enum_id > r->end) | |
| return 0; | |
| return 1; | |
| } | |
| u32 sh_pfc_read_raw_reg(void __iomem *mapped_reg, unsigned int reg_width) | |
| { | |
| switch (reg_width) { | |
| case 8: | |
| return ioread8(mapped_reg); | |
| case 16: | |
| return ioread16(mapped_reg); | |
| case 32: | |
| return ioread32(mapped_reg); | |
| } | |
| BUG(); | |
| return 0; | |
| } | |
| void sh_pfc_write_raw_reg(void __iomem *mapped_reg, unsigned int reg_width, | |
| u32 data) | |
| { | |
| switch (reg_width) { | |
| case 8: | |
| iowrite8(data, mapped_reg); | |
| return; | |
| case 16: | |
| iowrite16(data, mapped_reg); | |
| return; | |
| case 32: | |
| iowrite32(data, mapped_reg); | |
| return; | |
| } | |
| BUG(); | |
| } | |
| u32 sh_pfc_read(struct sh_pfc *pfc, u32 reg) | |
| { | |
| return sh_pfc_read_raw_reg(sh_pfc_phys_to_virt(pfc, reg), 32); | |
| } | |
| static void sh_pfc_unlock_reg(struct sh_pfc *pfc, u32 reg, u32 data) | |
| { | |
| u32 unlock; | |
| if (!pfc->info->unlock_reg) | |
| return; | |
| if (pfc->info->unlock_reg >= 0x80000000UL) | |
| unlock = pfc->info->unlock_reg; | |
| else | |
| /* unlock_reg is a mask */ | |
| unlock = reg & ~pfc->info->unlock_reg; | |
| sh_pfc_write_raw_reg(sh_pfc_phys_to_virt(pfc, unlock), 32, ~data); | |
| } | |
| void sh_pfc_write(struct sh_pfc *pfc, u32 reg, u32 data) | |
| { | |
| sh_pfc_unlock_reg(pfc, reg, data); | |
| sh_pfc_write_raw_reg(sh_pfc_phys_to_virt(pfc, reg), 32, data); | |
| } | |
| static void sh_pfc_config_reg_helper(struct sh_pfc *pfc, | |
| const struct pinmux_cfg_reg *crp, | |
| unsigned int in_pos, | |
| void __iomem **mapped_regp, u32 *maskp, | |
| unsigned int *posp) | |
| { | |
| unsigned int k; | |
| *mapped_regp = sh_pfc_phys_to_virt(pfc, crp->reg); | |
| if (crp->field_width) { | |
| *maskp = (1 << crp->field_width) - 1; | |
| *posp = crp->reg_width - ((in_pos + 1) * crp->field_width); | |
| } else { | |
| *maskp = (1 << crp->var_field_width[in_pos]) - 1; | |
| *posp = crp->reg_width; | |
| for (k = 0; k <= in_pos; k++) | |
| *posp -= abs(crp->var_field_width[k]); | |
| } | |
| } | |
| static void sh_pfc_write_config_reg(struct sh_pfc *pfc, | |
| const struct pinmux_cfg_reg *crp, | |
| unsigned int field, u32 value) | |
| { | |
| void __iomem *mapped_reg; | |
| unsigned int pos; | |
| u32 mask, data; | |
| sh_pfc_config_reg_helper(pfc, crp, field, &mapped_reg, &mask, &pos); | |
| dev_dbg(pfc->dev, "write_reg addr = %x, value = 0x%x, field = %u, " | |
| "r_width = %u, f_width = %u\n", | |
| crp->reg, value, field, crp->reg_width, hweight32(mask)); | |
| mask = ~(mask << pos); | |
| value = value << pos; | |
| data = sh_pfc_read_raw_reg(mapped_reg, crp->reg_width); | |
| data &= mask; | |
| data |= value; | |
| sh_pfc_unlock_reg(pfc, crp->reg, data); | |
| sh_pfc_write_raw_reg(mapped_reg, crp->reg_width, data); | |
| } | |
| static int sh_pfc_get_config_reg(struct sh_pfc *pfc, u16 enum_id, | |
| const struct pinmux_cfg_reg **crp, | |
| unsigned int *fieldp, u32 *valuep) | |
| { | |
| unsigned int k = 0; | |
| while (1) { | |
| const struct pinmux_cfg_reg *config_reg = | |
| pfc->info->cfg_regs + k; | |
| unsigned int r_width = config_reg->reg_width; | |
| unsigned int f_width = config_reg->field_width; | |
| unsigned int curr_width; | |
| unsigned int bit_pos; | |
| unsigned int pos = 0; | |
| unsigned int m = 0; | |
| if (!r_width) | |
| break; | |
| for (bit_pos = 0; bit_pos < r_width; bit_pos += curr_width, m++) { | |
| u32 ncomb; | |
| u32 n; | |
| if (f_width) { | |
| curr_width = f_width; | |
| } else { | |
| curr_width = abs(config_reg->var_field_width[m]); | |
| if (config_reg->var_field_width[m] < 0) | |
| continue; | |
| } | |
| ncomb = 1 << curr_width; | |
| for (n = 0; n < ncomb; n++) { | |
| if (config_reg->enum_ids[pos + n] == enum_id) { | |
| *crp = config_reg; | |
| *fieldp = m; | |
| *valuep = n; | |
| return 0; | |
| } | |
| } | |
| pos += ncomb; | |
| } | |
| k++; | |
| } | |
| return -EINVAL; | |
| } | |
| static int sh_pfc_mark_to_enum(struct sh_pfc *pfc, u16 mark, int pos, | |
| u16 *enum_idp) | |
| { | |
| const u16 *data = pfc->info->pinmux_data; | |
| unsigned int k; | |
| if (pos) { | |
| *enum_idp = data[pos + 1]; | |
| return pos + 1; | |
| } | |
| for (k = 0; k < pfc->info->pinmux_data_size; k++) { | |
| if (data[k] == mark) { | |
| *enum_idp = data[k + 1]; | |
| return k + 1; | |
| } | |
| } | |
| dev_err(pfc->dev, "cannot locate data/mark enum_id for mark %d\n", | |
| mark); | |
| return -EINVAL; | |
| } | |
| int sh_pfc_config_mux(struct sh_pfc *pfc, unsigned mark, int pinmux_type) | |
| { | |
| const struct pinmux_range *range; | |
| int pos = 0; | |
| switch (pinmux_type) { | |
| case PINMUX_TYPE_GPIO: | |
| case PINMUX_TYPE_FUNCTION: | |
| range = NULL; | |
| break; | |
| #ifdef CONFIG_PINCTRL_SH_PFC_GPIO | |
| case PINMUX_TYPE_OUTPUT: | |
| range = &pfc->info->output; | |
| break; | |
| case PINMUX_TYPE_INPUT: | |
| range = &pfc->info->input; | |
| break; | |
| #endif /* CONFIG_PINCTRL_SH_PFC_GPIO */ | |
| default: | |
| return -EINVAL; | |
| } | |
| /* Iterate over all the configuration fields we need to update. */ | |
| while (1) { | |
| const struct pinmux_cfg_reg *cr; | |
| unsigned int field; | |
| u16 enum_id; | |
| u32 value; | |
| int in_range; | |
| int ret; | |
| pos = sh_pfc_mark_to_enum(pfc, mark, pos, &enum_id); | |
| if (pos < 0) | |
| return pos; | |
| if (!enum_id) | |
| break; | |
| /* Check if the configuration field selects a function. If it | |
| * doesn't, skip the field if it's not applicable to the | |
| * requested pinmux type. | |
| */ | |
| in_range = sh_pfc_enum_in_range(enum_id, &pfc->info->function); | |
| if (!in_range) { | |
| if (pinmux_type == PINMUX_TYPE_FUNCTION) { | |
| /* Functions are allowed to modify all | |
| * fields. | |
| */ | |
| in_range = 1; | |
| } else if (pinmux_type != PINMUX_TYPE_GPIO) { | |
| /* Input/output types can only modify fields | |
| * that correspond to their respective ranges. | |
| */ | |
| in_range = sh_pfc_enum_in_range(enum_id, range); | |
| /* | |
| * special case pass through for fixed | |
| * input-only or output-only pins without | |
| * function enum register association. | |
| */ | |
| if (in_range && enum_id == range->force) | |
| continue; | |
| } | |
| /* GPIOs are only allowed to modify function fields. */ | |
| } | |
| if (!in_range) | |
| continue; | |
| ret = sh_pfc_get_config_reg(pfc, enum_id, &cr, &field, &value); | |
| if (ret < 0) | |
| return ret; | |
| sh_pfc_write_config_reg(pfc, cr, field, value); | |
| } | |
| return 0; | |
| } | |
| static int sh_pfc_init_ranges(struct sh_pfc *pfc) | |
| { | |
| struct sh_pfc_pin_range *range; | |
| unsigned int nr_ranges; | |
| unsigned int i; | |
| if (pfc->info->pins[0].pin == (u16)-1) { | |
| /* Pin number -1 denotes that the SoC doesn't report pin numbers | |
| * in its pin arrays yet. Consider the pin numbers range as | |
| * continuous and allocate a single range. | |
| */ | |
| pfc->nr_ranges = 1; | |
| pfc->ranges = devm_kzalloc(pfc->dev, sizeof(*pfc->ranges), | |
| GFP_KERNEL); | |
| if (pfc->ranges == NULL) | |
| return -ENOMEM; | |
| pfc->ranges->start = 0; | |
| pfc->ranges->end = pfc->info->nr_pins - 1; | |
| pfc->nr_gpio_pins = pfc->info->nr_pins; | |
| return 0; | |
| } | |
| /* Count, allocate and fill the ranges. The PFC SoC data pins array must | |
| * be sorted by pin numbers, and pins without a GPIO port must come | |
| * last. | |
| */ | |
| for (i = 1, nr_ranges = 1; i < pfc->info->nr_pins; ++i) { | |
| if (pfc->info->pins[i-1].pin != pfc->info->pins[i].pin - 1) | |
| nr_ranges++; | |
| } | |
| pfc->nr_ranges = nr_ranges; | |
| pfc->ranges = devm_kcalloc(pfc->dev, nr_ranges, sizeof(*pfc->ranges), | |
| GFP_KERNEL); | |
| if (pfc->ranges == NULL) | |
| return -ENOMEM; | |
| range = pfc->ranges; | |
| range->start = pfc->info->pins[0].pin; | |
| for (i = 1; i < pfc->info->nr_pins; ++i) { | |
| if (pfc->info->pins[i-1].pin == pfc->info->pins[i].pin - 1) | |
| continue; | |
| range->end = pfc->info->pins[i-1].pin; | |
| if (!(pfc->info->pins[i-1].configs & SH_PFC_PIN_CFG_NO_GPIO)) | |
| pfc->nr_gpio_pins = range->end + 1; | |
| range++; | |
| range->start = pfc->info->pins[i].pin; | |
| } | |
| range->end = pfc->info->pins[i-1].pin; | |
| if (!(pfc->info->pins[i-1].configs & SH_PFC_PIN_CFG_NO_GPIO)) | |
| pfc->nr_gpio_pins = range->end + 1; | |
| return 0; | |
| } | |
| #ifdef CONFIG_OF | |
| static const struct of_device_id sh_pfc_of_table[] = { | |
| #ifdef CONFIG_PINCTRL_PFC_EMEV2 | |
| { | |
| .compatible = "renesas,pfc-emev2", | |
| .data = &emev2_pinmux_info, | |
| }, | |
| #endif | |
| #ifdef CONFIG_PINCTRL_PFC_R8A73A4 | |
| { | |
| .compatible = "renesas,pfc-r8a73a4", | |
| .data = &r8a73a4_pinmux_info, | |
| }, | |
| #endif | |
| #ifdef CONFIG_PINCTRL_PFC_R8A7740 | |
| { | |
| .compatible = "renesas,pfc-r8a7740", | |
| .data = &r8a7740_pinmux_info, | |
| }, | |
| #endif | |
| #ifdef CONFIG_PINCTRL_PFC_R8A7742 | |
| { | |
| .compatible = "renesas,pfc-r8a7742", | |
| .data = &r8a7742_pinmux_info, | |
| }, | |
| #endif | |
| #ifdef CONFIG_PINCTRL_PFC_R8A7743 | |
| { | |
| .compatible = "renesas,pfc-r8a7743", | |
| .data = &r8a7743_pinmux_info, | |
| }, | |
| #endif | |
| #ifdef CONFIG_PINCTRL_PFC_R8A7744 | |
| { | |
| .compatible = "renesas,pfc-r8a7744", | |
| .data = &r8a7744_pinmux_info, | |
| }, | |
| #endif | |
| #ifdef CONFIG_PINCTRL_PFC_R8A7745 | |
| { | |
| .compatible = "renesas,pfc-r8a7745", | |
| .data = &r8a7745_pinmux_info, | |
| }, | |
| #endif | |
| #ifdef CONFIG_PINCTRL_PFC_R8A77470 | |
| { | |
| .compatible = "renesas,pfc-r8a77470", | |
| .data = &r8a77470_pinmux_info, | |
| }, | |
| #endif | |
| #ifdef CONFIG_PINCTRL_PFC_R8A774A1 | |
| { | |
| .compatible = "renesas,pfc-r8a774a1", | |
| .data = &r8a774a1_pinmux_info, | |
| }, | |
| #endif | |
| #ifdef CONFIG_PINCTRL_PFC_R8A774B1 | |
| { | |
| .compatible = "renesas,pfc-r8a774b1", | |
| .data = &r8a774b1_pinmux_info, | |
| }, | |
| #endif | |
| #ifdef CONFIG_PINCTRL_PFC_R8A774C0 | |
| { | |
| .compatible = "renesas,pfc-r8a774c0", | |
| .data = &r8a774c0_pinmux_info, | |
| }, | |
| #endif | |
| #ifdef CONFIG_PINCTRL_PFC_R8A774E1 | |
| { | |
| .compatible = "renesas,pfc-r8a774e1", | |
| .data = &r8a774e1_pinmux_info, | |
| }, | |
| #endif | |
| #ifdef CONFIG_PINCTRL_PFC_R8A7778 | |
| { | |
| .compatible = "renesas,pfc-r8a7778", | |
| .data = &r8a7778_pinmux_info, | |
| }, | |
| #endif | |
| #ifdef CONFIG_PINCTRL_PFC_R8A7779 | |
| { | |
| .compatible = "renesas,pfc-r8a7779", | |
| .data = &r8a7779_pinmux_info, | |
| }, | |
| #endif | |
| #ifdef CONFIG_PINCTRL_PFC_R8A7790 | |
| { | |
| .compatible = "renesas,pfc-r8a7790", | |
| .data = &r8a7790_pinmux_info, | |
| }, | |
| #endif | |
| #ifdef CONFIG_PINCTRL_PFC_R8A7791 | |
| { | |
| .compatible = "renesas,pfc-r8a7791", | |
| .data = &r8a7791_pinmux_info, | |
| }, | |
| #endif | |
| #ifdef CONFIG_PINCTRL_PFC_R8A7792 | |
| { | |
| .compatible = "renesas,pfc-r8a7792", | |
| .data = &r8a7792_pinmux_info, | |
| }, | |
| #endif | |
| #ifdef CONFIG_PINCTRL_PFC_R8A7793 | |
| { | |
| .compatible = "renesas,pfc-r8a7793", | |
| .data = &r8a7793_pinmux_info, | |
| }, | |
| #endif | |
| #ifdef CONFIG_PINCTRL_PFC_R8A7794 | |
| { | |
| .compatible = "renesas,pfc-r8a7794", | |
| .data = &r8a7794_pinmux_info, | |
| }, | |
| #endif | |
| /* | |
| * Both r8a7795 entries must be present to make sanity checks work, but only | |
| * the first entry is actually used. | |
| * R-Car H3 ES1.x is matched using soc_device_match() instead. | |
| */ | |
| #ifdef CONFIG_PINCTRL_PFC_R8A77951 | |
| { | |
| .compatible = "renesas,pfc-r8a7795", | |
| .data = &r8a77951_pinmux_info, | |
| }, | |
| #endif | |
| #ifdef CONFIG_PINCTRL_PFC_R8A77950 | |
| { | |
| .compatible = "renesas,pfc-r8a7795", | |
| .data = &r8a77950_pinmux_info, | |
| }, | |
| #endif | |
| #ifdef CONFIG_PINCTRL_PFC_R8A77960 | |
| { | |
| .compatible = "renesas,pfc-r8a7796", | |
| .data = &r8a77960_pinmux_info, | |
| }, | |
| #endif | |
| #ifdef CONFIG_PINCTRL_PFC_R8A77961 | |
| { | |
| .compatible = "renesas,pfc-r8a77961", | |
| .data = &r8a77961_pinmux_info, | |
| }, | |
| #endif | |
| #ifdef CONFIG_PINCTRL_PFC_R8A77965 | |
| { | |
| .compatible = "renesas,pfc-r8a77965", | |
| .data = &r8a77965_pinmux_info, | |
| }, | |
| #endif | |
| #ifdef CONFIG_PINCTRL_PFC_R8A77970 | |
| { | |
| .compatible = "renesas,pfc-r8a77970", | |
| .data = &r8a77970_pinmux_info, | |
| }, | |
| #endif | |
| #ifdef CONFIG_PINCTRL_PFC_R8A77980 | |
| { | |
| .compatible = "renesas,pfc-r8a77980", | |
| .data = &r8a77980_pinmux_info, | |
| }, | |
| #endif | |
| #ifdef CONFIG_PINCTRL_PFC_R8A77990 | |
| { | |
| .compatible = "renesas,pfc-r8a77990", | |
| .data = &r8a77990_pinmux_info, | |
| }, | |
| #endif | |
| #ifdef CONFIG_PINCTRL_PFC_R8A77995 | |
| { | |
| .compatible = "renesas,pfc-r8a77995", | |
| .data = &r8a77995_pinmux_info, | |
| }, | |
| #endif | |
| #ifdef CONFIG_PINCTRL_PFC_R8A779A0 | |
| { | |
| .compatible = "renesas,pfc-r8a779a0", | |
| .data = &r8a779a0_pinmux_info, | |
| }, | |
| #endif | |
| #ifdef CONFIG_PINCTRL_PFC_R8A779F0 | |
| { | |
| .compatible = "renesas,pfc-r8a779f0", | |
| .data = &r8a779f0_pinmux_info, | |
| }, | |
| #endif | |
| #ifdef CONFIG_PINCTRL_PFC_R8A779G0 | |
| { | |
| .compatible = "renesas,pfc-r8a779g0", | |
| .data = &r8a779g0_pinmux_info, | |
| }, | |
| #endif | |
| #ifdef CONFIG_PINCTRL_PFC_SH73A0 | |
| { | |
| .compatible = "renesas,pfc-sh73a0", | |
| .data = &sh73a0_pinmux_info, | |
| }, | |
| #endif | |
| { }, | |
| }; | |
| #endif | |
| #if defined(CONFIG_PM_SLEEP) && defined(CONFIG_ARM_PSCI_FW) | |
| static void sh_pfc_nop_reg(struct sh_pfc *pfc, u32 reg, unsigned int idx) | |
| { | |
| } | |
| static void sh_pfc_save_reg(struct sh_pfc *pfc, u32 reg, unsigned int idx) | |
| { | |
| pfc->saved_regs[idx] = sh_pfc_read(pfc, reg); | |
| } | |
| static void sh_pfc_restore_reg(struct sh_pfc *pfc, u32 reg, unsigned int idx) | |
| { | |
| sh_pfc_write(pfc, reg, pfc->saved_regs[idx]); | |
| } | |
| static unsigned int sh_pfc_walk_regs(struct sh_pfc *pfc, | |
| void (*do_reg)(struct sh_pfc *pfc, u32 reg, unsigned int idx)) | |
| { | |
| unsigned int i, n = 0; | |
| if (pfc->info->cfg_regs) | |
| for (i = 0; pfc->info->cfg_regs[i].reg; i++) | |
| do_reg(pfc, pfc->info->cfg_regs[i].reg, n++); | |
| if (pfc->info->drive_regs) | |
| for (i = 0; pfc->info->drive_regs[i].reg; i++) | |
| do_reg(pfc, pfc->info->drive_regs[i].reg, n++); | |
| if (pfc->info->bias_regs) | |
| for (i = 0; pfc->info->bias_regs[i].puen || | |
| pfc->info->bias_regs[i].pud; i++) { | |
| if (pfc->info->bias_regs[i].puen) | |
| do_reg(pfc, pfc->info->bias_regs[i].puen, n++); | |
| if (pfc->info->bias_regs[i].pud) | |
| do_reg(pfc, pfc->info->bias_regs[i].pud, n++); | |
| } | |
| if (pfc->info->ioctrl_regs) | |
| for (i = 0; pfc->info->ioctrl_regs[i].reg; i++) | |
| do_reg(pfc, pfc->info->ioctrl_regs[i].reg, n++); | |
| return n; | |
| } | |
| static int sh_pfc_suspend_init(struct sh_pfc *pfc) | |
| { | |
| unsigned int n; | |
| /* This is the best we can do to check for the presence of PSCI */ | |
| if (!psci_ops.cpu_suspend) | |
| return 0; | |
| n = sh_pfc_walk_regs(pfc, sh_pfc_nop_reg); | |
| if (!n) | |
| return 0; | |
| pfc->saved_regs = devm_kmalloc_array(pfc->dev, n, | |
| sizeof(*pfc->saved_regs), | |
| GFP_KERNEL); | |
| if (!pfc->saved_regs) | |
| return -ENOMEM; | |
| dev_dbg(pfc->dev, "Allocated space to save %u regs\n", n); | |
| return 0; | |
| } | |
| static int sh_pfc_suspend_noirq(struct device *dev) | |
| { | |
| struct sh_pfc *pfc = dev_get_drvdata(dev); | |
| if (pfc->saved_regs) | |
| sh_pfc_walk_regs(pfc, sh_pfc_save_reg); | |
| return 0; | |
| } | |
| static int sh_pfc_resume_noirq(struct device *dev) | |
| { | |
| struct sh_pfc *pfc = dev_get_drvdata(dev); | |
| if (pfc->saved_regs) | |
| sh_pfc_walk_regs(pfc, sh_pfc_restore_reg); | |
| return 0; | |
| } | |
| static const struct dev_pm_ops sh_pfc_pm = { | |
| SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(sh_pfc_suspend_noirq, sh_pfc_resume_noirq) | |
| }; | |
| #define DEV_PM_OPS &sh_pfc_pm | |
| #else | |
| static int sh_pfc_suspend_init(struct sh_pfc *pfc) { return 0; } | |
| #define DEV_PM_OPS NULL | |
| #endif /* CONFIG_PM_SLEEP && CONFIG_ARM_PSCI_FW */ | |
| #ifdef DEBUG | |
| #define SH_PFC_MAX_REGS 300 | |
| #define SH_PFC_MAX_ENUMS 5000 | |
| static unsigned int sh_pfc_errors __initdata; | |
| static unsigned int sh_pfc_warnings __initdata; | |
| static bool sh_pfc_bias_done __initdata; | |
| static bool sh_pfc_drive_done __initdata; | |
| static bool sh_pfc_power_done __initdata; | |
| static struct { | |
| u32 reg; | |
| u32 bits; | |
| } *sh_pfc_regs __initdata; | |
| static u32 sh_pfc_num_regs __initdata; | |
| static u16 *sh_pfc_enums __initdata; | |
| static u32 sh_pfc_num_enums __initdata; | |
| #define sh_pfc_err(fmt, ...) \ | |
| do { \ | |
| pr_err("%s: " fmt, drvname, ##__VA_ARGS__); \ | |
| sh_pfc_errors++; \ | |
| } while (0) | |
| #define sh_pfc_err_once(type, fmt, ...) \ | |
| do { \ | |
| if (!sh_pfc_ ## type ## _done) { \ | |
| sh_pfc_ ## type ## _done = true; \ | |
| sh_pfc_err(fmt, ##__VA_ARGS__); \ | |
| } \ | |
| } while (0) | |
| #define sh_pfc_warn(fmt, ...) \ | |
| do { \ | |
| pr_warn("%s: " fmt, drvname, ##__VA_ARGS__); \ | |
| sh_pfc_warnings++; \ | |
| } while (0) | |
| static bool __init is0s(const u16 *enum_ids, unsigned int n) | |
| { | |
| unsigned int i; | |
| for (i = 0; i < n; i++) | |
| if (enum_ids[i]) | |
| return false; | |
| return true; | |
| } | |
| static bool __init same_name(const char *a, const char *b) | |
| { | |
| return a && b && !strcmp(a, b); | |
| } | |
| static void __init sh_pfc_check_reg(const char *drvname, u32 reg, u32 bits) | |
| { | |
| unsigned int i; | |
| for (i = 0; i < sh_pfc_num_regs; i++) { | |
| if (reg != sh_pfc_regs[i].reg) | |
| continue; | |
| if (bits & sh_pfc_regs[i].bits) | |
| sh_pfc_err("reg 0x%x: bits 0x%x conflict\n", reg, | |
| bits & sh_pfc_regs[i].bits); | |
| sh_pfc_regs[i].bits |= bits; | |
| return; | |
| } | |
| if (sh_pfc_num_regs == SH_PFC_MAX_REGS) { | |
| pr_warn_once("%s: Please increase SH_PFC_MAX_REGS\n", drvname); | |
| return; | |
| } | |
| sh_pfc_regs[sh_pfc_num_regs].reg = reg; | |
| sh_pfc_regs[sh_pfc_num_regs].bits = bits; | |
| sh_pfc_num_regs++; | |
| } | |
| static int __init sh_pfc_check_enum(const char *drvname, u16 enum_id) | |
| { | |
| unsigned int i; | |
| for (i = 0; i < sh_pfc_num_enums; i++) { | |
| if (enum_id == sh_pfc_enums[i]) | |
| return -EINVAL; | |
| } | |
| if (sh_pfc_num_enums == SH_PFC_MAX_ENUMS) { | |
| pr_warn_once("%s: Please increase SH_PFC_MAX_ENUMS\n", drvname); | |
| return 0; | |
| } | |
| sh_pfc_enums[sh_pfc_num_enums++] = enum_id; | |
| return 0; | |
| } | |
| static void __init sh_pfc_check_reg_enums(const char *drvname, u32 reg, | |
| const u16 *enums, unsigned int n) | |
| { | |
| unsigned int i; | |
| for (i = 0; i < n; i++) { | |
| if (enums[i] && sh_pfc_check_enum(drvname, enums[i])) | |
| sh_pfc_err("reg 0x%x enum_id %u conflict\n", reg, | |
| enums[i]); | |
| } | |
| } | |
| static const struct sh_pfc_pin __init *sh_pfc_find_pin( | |
| const struct sh_pfc_soc_info *info, u32 reg, unsigned int pin) | |
| { | |
| const char *drvname = info->name; | |
| unsigned int i; | |
| if (pin == SH_PFC_PIN_NONE) | |
| return NULL; | |
| for (i = 0; i < info->nr_pins; i++) { | |
| if (pin == info->pins[i].pin) | |
| return &info->pins[i]; | |
| } | |
| sh_pfc_err("reg 0x%x: pin %u not found\n", reg, pin); | |
| return NULL; | |
| } | |
| static void __init sh_pfc_check_cfg_reg(const char *drvname, | |
| const struct pinmux_cfg_reg *cfg_reg) | |
| { | |
| unsigned int i, n, rw, r; | |
| int fw; | |
| sh_pfc_check_reg(drvname, cfg_reg->reg, | |
| GENMASK(cfg_reg->reg_width - 1, 0)); | |
| if (cfg_reg->field_width) { | |
| fw = cfg_reg->field_width; | |
| n = (cfg_reg->reg_width / fw) << fw; | |
| for (i = 0, r = 0; i < n; i += 1 << fw) { | |
| if (is0s(&cfg_reg->enum_ids[i], 1 << fw)) | |
| r++; | |
| } | |
| if ((r << fw) * sizeof(u16) > cfg_reg->reg_width / fw) | |
| sh_pfc_warn("reg 0x%x can be described with variable-width reserved fields\n", | |
| cfg_reg->reg); | |
| /* Skip field checks (done at build time) */ | |
| goto check_enum_ids; | |
| } | |
| for (i = 0, n = 0, rw = 0; (fw = cfg_reg->var_field_width[i]); i++) { | |
| if (fw < 0) { | |
| rw += -fw; | |
| } else { | |
| if (is0s(&cfg_reg->enum_ids[n], 1 << fw)) | |
| sh_pfc_warn("reg 0x%x: field [%u:%u] can be described as reserved\n", | |
| cfg_reg->reg, rw, rw + fw - 1); | |
| n += 1 << fw; | |
| rw += fw; | |
| } | |
| } | |
| if (rw != cfg_reg->reg_width) | |
| sh_pfc_err("reg 0x%x: var_field_width declares %u instead of %u bits\n", | |
| cfg_reg->reg, rw, cfg_reg->reg_width); | |
| if (n != cfg_reg->nr_enum_ids) | |
| sh_pfc_err("reg 0x%x: enum_ids[] has %u instead of %u values\n", | |
| cfg_reg->reg, cfg_reg->nr_enum_ids, n); | |
| check_enum_ids: | |
| sh_pfc_check_reg_enums(drvname, cfg_reg->reg, cfg_reg->enum_ids, n); | |
| } | |
| static void __init sh_pfc_check_drive_reg(const struct sh_pfc_soc_info *info, | |
| const struct pinmux_drive_reg *drive) | |
| { | |
| const char *drvname = info->name; | |
| const struct sh_pfc_pin *pin; | |
| unsigned int i; | |
| for (i = 0; i < ARRAY_SIZE(drive->fields); i++) { | |
| const struct pinmux_drive_reg_field *field = &drive->fields[i]; | |
| if (!field->pin && !field->offset && !field->size) | |
| continue; | |
| sh_pfc_check_reg(info->name, drive->reg, | |
| GENMASK(field->offset + field->size - 1, | |
| field->offset)); | |
| pin = sh_pfc_find_pin(info, drive->reg, field->pin); | |
| if (pin && !(pin->configs & SH_PFC_PIN_CFG_DRIVE_STRENGTH)) | |
| sh_pfc_err("drive_reg 0x%x: field %u: pin %s lacks SH_PFC_PIN_CFG_DRIVE_STRENGTH flag\n", | |
| drive->reg, i, pin->name); | |
| } | |
| } | |
| static void __init sh_pfc_check_bias_reg(const struct sh_pfc_soc_info *info, | |
| const struct pinmux_bias_reg *bias) | |
| { | |
| const char *drvname = info->name; | |
| const struct sh_pfc_pin *pin; | |
| unsigned int i; | |
| u32 bits; | |
| for (i = 0, bits = 0; i < ARRAY_SIZE(bias->pins); i++) | |
| if (bias->pins[i] != SH_PFC_PIN_NONE) | |
| bits |= BIT(i); | |
| if (bias->puen) | |
| sh_pfc_check_reg(info->name, bias->puen, bits); | |
| if (bias->pud) | |
| sh_pfc_check_reg(info->name, bias->pud, bits); | |
| for (i = 0; i < ARRAY_SIZE(bias->pins); i++) { | |
| pin = sh_pfc_find_pin(info, bias->puen, bias->pins[i]); | |
| if (!pin) | |
| continue; | |
| if (bias->puen && bias->pud) { | |
| /* | |
| * Pull-enable and pull-up/down control registers | |
| * As some SoCs have pins that support only pull-up | |
| * or pull-down, we just check for one of them | |
| */ | |
| if (!(pin->configs & SH_PFC_PIN_CFG_PULL_UP_DOWN)) | |
| sh_pfc_err("bias_reg 0x%x:%u: pin %s lacks one or more SH_PFC_PIN_CFG_PULL_* flags\n", | |
| bias->puen, i, pin->name); | |
| } else if (bias->puen) { | |
| /* Pull-up control register only */ | |
| if (!(pin->configs & SH_PFC_PIN_CFG_PULL_UP)) | |
| sh_pfc_err("bias_reg 0x%x:%u: pin %s lacks SH_PFC_PIN_CFG_PULL_UP flag\n", | |
| bias->puen, i, pin->name); | |
| } else if (bias->pud) { | |
| /* Pull-down control register only */ | |
| if (!(pin->configs & SH_PFC_PIN_CFG_PULL_DOWN)) | |
| sh_pfc_err("bias_reg 0x%x:%u: pin %s lacks SH_PFC_PIN_CFG_PULL_DOWN flag\n", | |
| bias->pud, i, pin->name); | |
| } | |
| } | |
| } | |
| static void __init sh_pfc_compare_groups(const char *drvname, | |
| const struct sh_pfc_pin_group *a, | |
| const struct sh_pfc_pin_group *b) | |
| { | |
| unsigned int i; | |
| size_t len; | |
| if (same_name(a->name, b->name)) | |
| sh_pfc_err("group %s: name conflict\n", a->name); | |
| if (a->nr_pins > b->nr_pins) | |
| swap(a, b); | |
| len = a->nr_pins * sizeof(a->pins[0]); | |
| for (i = 0; i <= b->nr_pins - a->nr_pins; i++) { | |
| if (a->pins == b->pins + i || a->mux == b->mux + i || | |
| memcmp(a->pins, b->pins + i, len) || | |
| memcmp(a->mux, b->mux + i, len)) | |
| continue; | |
| if (a->nr_pins == b->nr_pins) | |
| sh_pfc_warn("group %s can be an alias for %s\n", | |
| a->name, b->name); | |
| else | |
| sh_pfc_warn("group %s is a subset of %s\n", a->name, | |
| b->name); | |
| } | |
| } | |
| static void __init sh_pfc_check_info(const struct sh_pfc_soc_info *info) | |
| { | |
| const struct pinmux_drive_reg *drive_regs = info->drive_regs; | |
| #define drive_nfields ARRAY_SIZE(drive_regs->fields) | |
| #define drive_ofs(i) drive_regs[(i) / drive_nfields] | |
| #define drive_reg(i) drive_ofs(i).reg | |
| #define drive_bit(i) ((i) % drive_nfields) | |
| #define drive_field(i) drive_ofs(i).fields[drive_bit(i)] | |
| const struct pinmux_bias_reg *bias_regs = info->bias_regs; | |
| #define bias_npins ARRAY_SIZE(bias_regs->pins) | |
| #define bias_ofs(i) bias_regs[(i) / bias_npins] | |
| #define bias_puen(i) bias_ofs(i).puen | |
| #define bias_pud(i) bias_ofs(i).pud | |
| #define bias_bit(i) ((i) % bias_npins) | |
| #define bias_pin(i) bias_ofs(i).pins[bias_bit(i)] | |
| const char *drvname = info->name; | |
| unsigned int *refcnts; | |
| unsigned int i, j, k; | |
| pr_info("sh_pfc: Checking %s\n", drvname); | |
| sh_pfc_num_regs = 0; | |
| sh_pfc_num_enums = 0; | |
| sh_pfc_bias_done = false; | |
| sh_pfc_drive_done = false; | |
| sh_pfc_power_done = false; | |
| /* Check pins */ | |
| for (i = 0; i < info->nr_pins; i++) { | |
| const struct sh_pfc_pin *pin = &info->pins[i]; | |
| unsigned int x; | |
| if (!pin->name) { | |
| sh_pfc_err("empty pin %u\n", i); | |
| continue; | |
| } | |
| for (j = 0; j < i; j++) { | |
| const struct sh_pfc_pin *pin2 = &info->pins[j]; | |
| if (same_name(pin->name, pin2->name)) | |
| sh_pfc_err("pin %s: name conflict\n", | |
| pin->name); | |
| if (pin->pin != (u16)-1 && pin->pin == pin2->pin) | |
| sh_pfc_err("pin %s/%s: pin %u conflict\n", | |
| pin->name, pin2->name, pin->pin); | |
| if (pin->enum_id && pin->enum_id == pin2->enum_id) | |
| sh_pfc_err("pin %s/%s: enum_id %u conflict\n", | |
| pin->name, pin2->name, | |
| pin->enum_id); | |
| } | |
| if (pin->configs & SH_PFC_PIN_CFG_PULL_UP_DOWN) { | |
| if (!info->ops || !info->ops->get_bias || | |
| !info->ops->set_bias) | |
| sh_pfc_err_once(bias, "SH_PFC_PIN_CFG_PULL_* flag set but .[gs]et_bias() not implemented\n"); | |
| if (!bias_regs && | |
| (!info->ops || !info->ops->pin_to_portcr)) | |
| sh_pfc_err_once(bias, "SH_PFC_PIN_CFG_PULL_UP flag set but no bias_regs defined and .pin_to_portcr() not implemented\n"); | |
| } | |
| if ((pin->configs & SH_PFC_PIN_CFG_PULL_UP_DOWN) && bias_regs) { | |
| const struct pinmux_bias_reg *bias_reg = | |
| rcar_pin_to_bias_reg(info, pin->pin, &x); | |
| if (!bias_reg || | |
| ((pin->configs & SH_PFC_PIN_CFG_PULL_UP) && | |
| !bias_reg->puen)) | |
| sh_pfc_err("pin %s: SH_PFC_PIN_CFG_PULL_UP flag set but pin not in bias_regs\n", | |
| pin->name); | |
| if (!bias_reg || | |
| ((pin->configs & SH_PFC_PIN_CFG_PULL_DOWN) && | |
| !bias_reg->pud)) | |
| sh_pfc_err("pin %s: SH_PFC_PIN_CFG_PULL_DOWN flag set but pin not in bias_regs\n", | |
| pin->name); | |
| } | |
| if (pin->configs & SH_PFC_PIN_CFG_DRIVE_STRENGTH) { | |
| if (!drive_regs) { | |
| sh_pfc_err_once(drive, "SH_PFC_PIN_CFG_DRIVE_STRENGTH flag set but drive_regs missing\n"); | |
| } else { | |
| for (j = 0; drive_reg(j); j++) { | |
| if (!drive_field(j).pin && | |
| !drive_field(j).offset && | |
| !drive_field(j).size) | |
| continue; | |
| if (drive_field(j).pin == pin->pin) | |
| break; | |
| } | |
| if (!drive_reg(j)) | |
| sh_pfc_err("pin %s: SH_PFC_PIN_CFG_DRIVE_STRENGTH flag set but not in drive_regs\n", | |
| pin->name); | |
| } | |
| } | |
| if (pin->configs & SH_PFC_PIN_CFG_IO_VOLTAGE) { | |
| if (!info->ops || !info->ops->pin_to_pocctrl) | |
| sh_pfc_err_once(power, "SH_PFC_PIN_CFG_IO_VOLTAGE flag set but .pin_to_pocctrl() not implemented\n"); | |
| else if (info->ops->pin_to_pocctrl(pin->pin, &x) < 0) | |
| sh_pfc_err("pin %s: SH_PFC_PIN_CFG_IO_VOLTAGE set but invalid pin_to_pocctrl()\n", | |
| pin->name); | |
| } else if (info->ops && info->ops->pin_to_pocctrl && | |
| info->ops->pin_to_pocctrl(pin->pin, &x) >= 0) { | |
| sh_pfc_warn("pin %s: SH_PFC_PIN_CFG_IO_VOLTAGE not set but valid pin_to_pocctrl()\n", | |
| pin->name); | |
| } | |
| } | |
| /* Check groups and functions */ | |
| refcnts = kcalloc(info->nr_groups, sizeof(*refcnts), GFP_KERNEL); | |
| if (!refcnts) | |
| return; | |
| for (i = 0; i < info->nr_functions; i++) { | |
| const struct sh_pfc_function *func = &info->functions[i]; | |
| if (!func->name) { | |
| sh_pfc_err("empty function %u\n", i); | |
| continue; | |
| } | |
| for (j = 0; j < i; j++) { | |
| if (same_name(func->name, info->functions[j].name)) | |
| sh_pfc_err("function %s: name conflict\n", | |
| func->name); | |
| } | |
| for (j = 0; j < func->nr_groups; j++) { | |
| for (k = 0; k < info->nr_groups; k++) { | |
| if (same_name(func->groups[j], | |
| info->groups[k].name)) { | |
| refcnts[k]++; | |
| break; | |
| } | |
| } | |
| if (k == info->nr_groups) | |
| sh_pfc_err("function %s: group %s not found\n", | |
| func->name, func->groups[j]); | |
| } | |
| } | |
| for (i = 0; i < info->nr_groups; i++) { | |
| const struct sh_pfc_pin_group *group = &info->groups[i]; | |
| if (!group->name) { | |
| sh_pfc_err("empty group %u\n", i); | |
| continue; | |
| } | |
| for (j = 0; j < i; j++) | |
| sh_pfc_compare_groups(drvname, group, &info->groups[j]); | |
| if (!refcnts[i]) | |
| sh_pfc_err("orphan group %s\n", group->name); | |
| else if (refcnts[i] > 1) | |
| sh_pfc_warn("group %s referenced by %u functions\n", | |
| group->name, refcnts[i]); | |
| } | |
| kfree(refcnts); | |
| /* Check config register descriptions */ | |
| for (i = 0; info->cfg_regs && info->cfg_regs[i].reg; i++) | |
| sh_pfc_check_cfg_reg(drvname, &info->cfg_regs[i]); | |
| /* Check drive strength registers */ | |
| for (i = 0; drive_regs && drive_regs[i].reg; i++) | |
| sh_pfc_check_drive_reg(info, &drive_regs[i]); | |
| for (i = 0; drive_regs && drive_reg(i); i++) { | |
| if (!drive_field(i).pin && !drive_field(i).offset && | |
| !drive_field(i).size) | |
| continue; | |
| for (j = 0; j < i; j++) { | |
| if (drive_field(i).pin == drive_field(j).pin && | |
| drive_field(j).offset && drive_field(j).size) { | |
| sh_pfc_err("drive_reg 0x%x:%zu/0x%x:%zu: pin conflict\n", | |
| drive_reg(i), drive_bit(i), | |
| drive_reg(j), drive_bit(j)); | |
| } | |
| } | |
| } | |
| /* Check bias registers */ | |
| for (i = 0; bias_regs && (bias_regs[i].puen || bias_regs[i].pud); i++) | |
| sh_pfc_check_bias_reg(info, &bias_regs[i]); | |
| for (i = 0; bias_regs && (bias_puen(i) || bias_pud(i)); i++) { | |
| if (bias_pin(i) == SH_PFC_PIN_NONE) | |
| continue; | |
| for (j = 0; j < i; j++) { | |
| if (bias_pin(i) != bias_pin(j)) | |
| continue; | |
| if (bias_puen(i) && bias_puen(j)) | |
| sh_pfc_err("bias_reg 0x%x:%zu/0x%x:%zu: pin conflict\n", | |
| bias_puen(i), bias_bit(i), | |
| bias_puen(j), bias_bit(j)); | |
| if (bias_pud(i) && bias_pud(j)) | |
| sh_pfc_err("bias_reg 0x%x:%zu/0x%x:%zu: pin conflict\n", | |
| bias_pud(i), bias_bit(i), | |
| bias_pud(j), bias_bit(j)); | |
| } | |
| } | |
| /* Check ioctrl registers */ | |
| for (i = 0; info->ioctrl_regs && info->ioctrl_regs[i].reg; i++) | |
| sh_pfc_check_reg(drvname, info->ioctrl_regs[i].reg, U32_MAX); | |
| /* Check data registers */ | |
| for (i = 0; info->data_regs && info->data_regs[i].reg; i++) { | |
| sh_pfc_check_reg(drvname, info->data_regs[i].reg, | |
| GENMASK(info->data_regs[i].reg_width - 1, 0)); | |
| sh_pfc_check_reg_enums(drvname, info->data_regs[i].reg, | |
| info->data_regs[i].enum_ids, | |
| info->data_regs[i].reg_width); | |
| } | |
| #ifdef CONFIG_PINCTRL_SH_FUNC_GPIO | |
| /* Check function GPIOs */ | |
| for (i = 0; i < info->nr_func_gpios; i++) { | |
| const struct pinmux_func *func = &info->func_gpios[i]; | |
| if (!func->name) { | |
| sh_pfc_err("empty function gpio %u\n", i); | |
| continue; | |
| } | |
| for (j = 0; j < i; j++) { | |
| if (same_name(func->name, info->func_gpios[j].name)) | |
| sh_pfc_err("func_gpio %s: name conflict\n", | |
| func->name); | |
| } | |
| if (sh_pfc_check_enum(drvname, func->enum_id)) | |
| sh_pfc_err("%s enum_id %u conflict\n", func->name, | |
| func->enum_id); | |
| } | |
| #endif | |
| } | |
| static void __init sh_pfc_check_driver(const struct platform_driver *pdrv) | |
| { | |
| unsigned int i; | |
| if (!IS_ENABLED(CONFIG_SUPERH) && | |
| !of_find_matching_node(NULL, pdrv->driver.of_match_table)) | |
| return; | |
| sh_pfc_regs = kcalloc(SH_PFC_MAX_REGS, sizeof(*sh_pfc_regs), | |
| GFP_KERNEL); | |
| if (!sh_pfc_regs) | |
| return; | |
| sh_pfc_enums = kcalloc(SH_PFC_MAX_ENUMS, sizeof(*sh_pfc_enums), | |
| GFP_KERNEL); | |
| if (!sh_pfc_enums) | |
| goto free_regs; | |
| pr_warn("sh_pfc: Checking builtin pinmux tables\n"); | |
| for (i = 0; pdrv->id_table[i].name[0]; i++) | |
| sh_pfc_check_info((void *)pdrv->id_table[i].driver_data); | |
| #ifdef CONFIG_OF | |
| for (i = 0; pdrv->driver.of_match_table[i].compatible[0]; i++) | |
| sh_pfc_check_info(pdrv->driver.of_match_table[i].data); | |
| #endif | |
| pr_warn("sh_pfc: Detected %u errors and %u warnings\n", sh_pfc_errors, | |
| sh_pfc_warnings); | |
| kfree(sh_pfc_enums); | |
| free_regs: | |
| kfree(sh_pfc_regs); | |
| } | |
| #else /* !DEBUG */ | |
| static inline void sh_pfc_check_driver(struct platform_driver *pdrv) {} | |
| #endif /* !DEBUG */ | |
| #ifdef CONFIG_OF | |
| static const void *sh_pfc_quirk_match(void) | |
| { | |
| #ifdef CONFIG_PINCTRL_PFC_R8A77950 | |
| const struct soc_device_attribute *match; | |
| static const struct soc_device_attribute quirks[] = { | |
| { | |
| .soc_id = "r8a7795", .revision = "ES1.*", | |
| .data = &r8a77950_pinmux_info, | |
| }, | |
| { /* sentinel */ } | |
| }; | |
| match = soc_device_match(quirks); | |
| if (match) | |
| return match->data; | |
| #endif /* CONFIG_PINCTRL_PFC_R8A77950 */ | |
| return NULL; | |
| } | |
| #endif /* CONFIG_OF */ | |
| static int sh_pfc_probe(struct platform_device *pdev) | |
| { | |
| const struct sh_pfc_soc_info *info; | |
| struct sh_pfc *pfc; | |
| int ret; | |
| #ifdef CONFIG_OF | |
| if (pdev->dev.of_node) { | |
| info = sh_pfc_quirk_match(); | |
| if (!info) | |
| info = of_device_get_match_data(&pdev->dev); | |
| } else | |
| #endif | |
| info = (const void *)platform_get_device_id(pdev)->driver_data; | |
| pfc = devm_kzalloc(&pdev->dev, sizeof(*pfc), GFP_KERNEL); | |
| if (pfc == NULL) | |
| return -ENOMEM; | |
| pfc->info = info; | |
| pfc->dev = &pdev->dev; | |
| ret = sh_pfc_map_resources(pfc, pdev); | |
| if (unlikely(ret < 0)) | |
| return ret; | |
| spin_lock_init(&pfc->lock); | |
| if (info->ops && info->ops->init) { | |
| ret = info->ops->init(pfc); | |
| if (ret < 0) | |
| return ret; | |
| /* .init() may have overridden pfc->info */ | |
| info = pfc->info; | |
| } | |
| ret = sh_pfc_suspend_init(pfc); | |
| if (ret) | |
| return ret; | |
| /* Enable dummy states for those platforms without pinctrl support */ | |
| if (!of_have_populated_dt()) | |
| pinctrl_provide_dummies(); | |
| ret = sh_pfc_init_ranges(pfc); | |
| if (ret < 0) | |
| return ret; | |
| /* | |
| * Initialize pinctrl bindings first | |
| */ | |
| ret = sh_pfc_register_pinctrl(pfc); | |
| if (unlikely(ret != 0)) | |
| return ret; | |
| #ifdef CONFIG_PINCTRL_SH_PFC_GPIO | |
| /* | |
| * Then the GPIO chip | |
| */ | |
| ret = sh_pfc_register_gpiochip(pfc); | |
| if (unlikely(ret != 0)) { | |
| /* | |
| * If the GPIO chip fails to come up we still leave the | |
| * PFC state as it is, given that there are already | |
| * extant users of it that have succeeded by this point. | |
| */ | |
| dev_notice(pfc->dev, "failed to init GPIO chip, ignoring...\n"); | |
| } | |
| #endif | |
| platform_set_drvdata(pdev, pfc); | |
| dev_info(pfc->dev, "%s support registered\n", info->name); | |
| return 0; | |
| } | |
| static const struct platform_device_id sh_pfc_id_table[] = { | |
| #ifdef CONFIG_PINCTRL_PFC_SH7203 | |
| { "pfc-sh7203", (kernel_ulong_t)&sh7203_pinmux_info }, | |
| #endif | |
| #ifdef CONFIG_PINCTRL_PFC_SH7264 | |
| { "pfc-sh7264", (kernel_ulong_t)&sh7264_pinmux_info }, | |
| #endif | |
| #ifdef CONFIG_PINCTRL_PFC_SH7269 | |
| { "pfc-sh7269", (kernel_ulong_t)&sh7269_pinmux_info }, | |
| #endif | |
| #ifdef CONFIG_PINCTRL_PFC_SH7720 | |
| { "pfc-sh7720", (kernel_ulong_t)&sh7720_pinmux_info }, | |
| #endif | |
| #ifdef CONFIG_PINCTRL_PFC_SH7722 | |
| { "pfc-sh7722", (kernel_ulong_t)&sh7722_pinmux_info }, | |
| #endif | |
| #ifdef CONFIG_PINCTRL_PFC_SH7723 | |
| { "pfc-sh7723", (kernel_ulong_t)&sh7723_pinmux_info }, | |
| #endif | |
| #ifdef CONFIG_PINCTRL_PFC_SH7724 | |
| { "pfc-sh7724", (kernel_ulong_t)&sh7724_pinmux_info }, | |
| #endif | |
| #ifdef CONFIG_PINCTRL_PFC_SH7734 | |
| { "pfc-sh7734", (kernel_ulong_t)&sh7734_pinmux_info }, | |
| #endif | |
| #ifdef CONFIG_PINCTRL_PFC_SH7757 | |
| { "pfc-sh7757", (kernel_ulong_t)&sh7757_pinmux_info }, | |
| #endif | |
| #ifdef CONFIG_PINCTRL_PFC_SH7785 | |
| { "pfc-sh7785", (kernel_ulong_t)&sh7785_pinmux_info }, | |
| #endif | |
| #ifdef CONFIG_PINCTRL_PFC_SH7786 | |
| { "pfc-sh7786", (kernel_ulong_t)&sh7786_pinmux_info }, | |
| #endif | |
| #ifdef CONFIG_PINCTRL_PFC_SHX3 | |
| { "pfc-shx3", (kernel_ulong_t)&shx3_pinmux_info }, | |
| #endif | |
| { }, | |
| }; | |
| static struct platform_driver sh_pfc_driver = { | |
| .probe = sh_pfc_probe, | |
| .id_table = sh_pfc_id_table, | |
| .driver = { | |
| .name = DRV_NAME, | |
| .of_match_table = of_match_ptr(sh_pfc_of_table), | |
| .pm = DEV_PM_OPS, | |
| }, | |
| }; | |
| static int __init sh_pfc_init(void) | |
| { | |
| sh_pfc_check_driver(&sh_pfc_driver); | |
| return platform_driver_register(&sh_pfc_driver); | |
| } | |
| postcore_initcall(sh_pfc_init); |