| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Tony Lindgren | 4222 | 48.57% | 17 | 25.37% |
| Haojian Zhuang | 2713 | 31.21% | 5 | 7.46% |
| Prakash Manjunathappa | 671 | 7.72% | 2 | 2.99% |
| J Keerthy | 423 | 4.87% | 3 | 4.48% |
| David Lechner | 106 | 1.22% | 1 | 1.49% |
| Drew Fustini | 62 | 0.71% | 2 | 2.99% |
| Sherman Yin | 62 | 0.71% | 1 | 1.49% |
| Hebbar Gururaja | 59 | 0.68% | 1 | 1.49% |
| Nishanth Menon | 42 | 0.48% | 1 | 1.49% |
| Peter Ujfalusi | 41 | 0.47% | 2 | 2.99% |
| Axel Haslam | 34 | 0.39% | 2 | 2.99% |
| Colin Ian King | 34 | 0.39% | 3 | 4.48% |
| Kees Cook | 32 | 0.37% | 1 | 1.49% |
| Matt Porter | 30 | 0.35% | 1 | 1.49% |
| Tomi Valkeinen | 25 | 0.29% | 1 | 1.49% |
| Geert Uytterhoeven | 24 | 0.28% | 1 | 1.49% |
| Sudeep Holla | 14 | 0.16% | 1 | 1.49% |
| Chao Xie | 12 | 0.14% | 1 | 1.49% |
| Roger Quadros | 11 | 0.13% | 1 | 1.49% |
| Dan Carpenter | 10 | 0.12% | 1 | 1.49% |
| Andrew Lunn | 9 | 0.10% | 1 | 1.49% |
| Lee Jones | 8 | 0.09% | 1 | 1.49% |
| Rob Herring | 8 | 0.09% | 1 | 1.49% |
| Axel Lin | 8 | 0.09% | 1 | 1.49% |
| Masahiro Yamada | 7 | 0.08% | 2 | 2.99% |
| Wei Yongjun | 6 | 0.07% | 1 | 1.49% |
| Thomas Gleixner | 3 | 0.03% | 1 | 1.49% |
| Linus Walleij | 3 | 0.03% | 2 | 2.99% |
| Gustavo A. R. Silva | 2 | 0.02% | 1 | 1.49% |
| Jean-François Moine | 2 | 0.02% | 1 | 1.49% |
| Grygorii Strashko | 2 | 0.02% | 1 | 1.49% |
| Jiang Liu | 2 | 0.02% | 1 | 1.49% |
| Laurent Pinchart | 2 | 0.02% | 1 | 1.49% |
| Mika Westerberg | 1 | 0.01% | 1 | 1.49% |
| Krzysztof Kozlowski | 1 | 0.01% | 1 | 1.49% |
| Sachin Kamat | 1 | 0.01% | 1 | 1.49% |
| Fabian Frederick | 1 | 0.01% | 1 | 1.49% |
| Total | 8693 | 67 |
/* * Generic device tree based pinctrl driver for one register per pin * type pinmux controllers * * Copyright (C) 2012 Texas Instruments, Inc. * * This file is licensed under the terms of the GNU General Public * License version 2. This program is licensed "as is" without any * warranty of any kind, whether express or implied. */ #include <linux/init.h> #include <linux/module.h> #include <linux/io.h> #include <linux/slab.h> #include <linux/err.h> #include <linux/list.h> #include <linux/interrupt.h> #include <linux/irqchip/chained_irq.h> #include <linux/of.h> #include <linux/of_device.h> #include <linux/of_address.h> #include <linux/of_irq.h> #include <linux/pinctrl/pinctrl.h> #include <linux/pinctrl/pinmux.h> #include <linux/pinctrl/pinconf-generic.h> #include <linux/platform_data/pinctrl-single.h> #include "core.h" #include "devicetree.h" #include "pinconf.h" #include "pinmux.h" #define DRIVER_NAME "pinctrl-single" #define PCS_OFF_DISABLED ~0U /** * struct pcs_func_vals - mux function register offset and value pair * @reg: register virtual address * @val: register value * @mask: mask */ struct pcs_func_vals { void __iomem *reg; unsigned val; unsigned mask; }; /** * struct pcs_conf_vals - pinconf parameter, pinconf register offset * and value, enable, disable, mask * @param: config parameter * @val: user input bits in the pinconf register * @enable: enable bits in the pinconf register * @disable: disable bits in the pinconf register * @mask: mask bits in the register value */ struct pcs_conf_vals { enum pin_config_param param; unsigned val; unsigned enable; unsigned disable; unsigned mask; }; /** * struct pcs_conf_type - pinconf property name, pinconf param pair * @name: property name in DTS file * @param: config parameter */ struct pcs_conf_type { const char *name; enum pin_config_param param; }; /** * struct pcs_function - pinctrl function * @name: pinctrl function name * @vals: register and vals array * @nvals: number of entries in vals array * @pgnames: array of pingroup names the function uses * @npgnames: number of pingroup names the function uses * @conf: array of pin configurations * @nconfs: number of pin configurations available * @node: list node */ struct pcs_function { const char *name; struct pcs_func_vals *vals; unsigned nvals; const char **pgnames; int npgnames; struct pcs_conf_vals *conf; int nconfs; struct list_head node; }; /** * struct pcs_gpiofunc_range - pin ranges with same mux value of gpio function * @offset: offset base of pins * @npins: number pins with the same mux value of gpio function * @gpiofunc: mux value of gpio function * @node: list node */ struct pcs_gpiofunc_range { unsigned offset; unsigned npins; unsigned gpiofunc; struct list_head node; }; /** * struct pcs_data - wrapper for data needed by pinctrl framework * @pa: pindesc array * @cur: index to current element * * REVISIT: We should be able to drop this eventually by adding * support for registering pins individually in the pinctrl * framework for those drivers that don't need a static array. */ struct pcs_data { struct pinctrl_pin_desc *pa; int cur; }; /** * struct pcs_soc_data - SoC specific settings * @flags: initial SoC specific PCS_FEAT_xxx values * @irq: optional interrupt for the controller * @irq_enable_mask: optional SoC specific interrupt enable mask * @irq_status_mask: optional SoC specific interrupt status mask * @rearm: optional SoC specific wake-up rearm function */ struct pcs_soc_data { unsigned flags; int irq; unsigned irq_enable_mask; unsigned irq_status_mask; void (*rearm)(void); }; /** * struct pcs_device - pinctrl device instance * @res: resources * @base: virtual address of the controller * @saved_vals: saved values for the controller * @size: size of the ioremapped area * @dev: device entry * @np: device tree node * @pctl: pin controller device * @flags: mask of PCS_FEAT_xxx values * @missing_nr_pinctrl_cells: for legacy binding, may go away * @socdata: soc specific data * @lock: spinlock for register access * @mutex: mutex protecting the lists * @width: bits per mux register * @fmask: function register mask * @fshift: function register shift * @foff: value to turn mux off * @fmax: max number of functions in fmask * @bits_per_mux: number of bits per mux * @bits_per_pin: number of bits per pin * @pins: physical pins on the SoC * @gpiofuncs: list of gpio functions * @irqs: list of interrupt registers * @chip: chip container for this instance * @domain: IRQ domain for this instance * @desc: pin controller descriptor * @read: register read function to use * @write: register write function to use */ struct pcs_device { struct resource *res; void __iomem *base; void *saved_vals; unsigned size; struct device *dev; struct device_node *np; struct pinctrl_dev *pctl; unsigned flags; #define PCS_CONTEXT_LOSS_OFF (1 << 3) #define PCS_QUIRK_SHARED_IRQ (1 << 2) #define PCS_FEAT_IRQ (1 << 1) #define PCS_FEAT_PINCONF (1 << 0) struct property *missing_nr_pinctrl_cells; struct pcs_soc_data socdata; raw_spinlock_t lock; struct mutex mutex; unsigned width; unsigned fmask; unsigned fshift; unsigned foff; unsigned fmax; bool bits_per_mux; unsigned bits_per_pin; struct pcs_data pins; struct list_head gpiofuncs; struct list_head irqs; struct irq_chip chip; struct irq_domain *domain; struct pinctrl_desc desc; unsigned (*read)(void __iomem *reg); void (*write)(unsigned val, void __iomem *reg); }; #define PCS_QUIRK_HAS_SHARED_IRQ (pcs->flags & PCS_QUIRK_SHARED_IRQ) #define PCS_HAS_IRQ (pcs->flags & PCS_FEAT_IRQ) #define PCS_HAS_PINCONF (pcs->flags & PCS_FEAT_PINCONF) static int pcs_pinconf_get(struct pinctrl_dev *pctldev, unsigned pin, unsigned long *config); static int pcs_pinconf_set(struct pinctrl_dev *pctldev, unsigned pin, unsigned long *configs, unsigned num_configs); static enum pin_config_param pcs_bias[] = { PIN_CONFIG_BIAS_PULL_DOWN, PIN_CONFIG_BIAS_PULL_UP, }; /* * This lock class tells lockdep that irqchip core that this single * pinctrl can be in a different category than its parents, so it won't * report false recursion. */ static struct lock_class_key pcs_lock_class; /* Class for the IRQ request mutex */ static struct lock_class_key pcs_request_class; /* * REVISIT: Reads and writes could eventually use regmap or something * generic. But at least on omaps, some mux registers are performance * critical as they may need to be remuxed every time before and after * idle. Adding tests for register access width for every read and * write like regmap is doing is not desired, and caching the registers * does not help in this case. */ static unsigned __maybe_unused pcs_readb(void __iomem *reg) { return readb(reg); } static unsigned __maybe_unused pcs_readw(void __iomem *reg) { return readw(reg); } static unsigned __maybe_unused pcs_readl(void __iomem *reg) { return readl(reg); } static void __maybe_unused pcs_writeb(unsigned val, void __iomem *reg) { writeb(val, reg); } static void __maybe_unused pcs_writew(unsigned val, void __iomem *reg) { writew(val, reg); } static void __maybe_unused pcs_writel(unsigned val, void __iomem *reg) { writel(val, reg); } static void pcs_pin_dbg_show(struct pinctrl_dev *pctldev, struct seq_file *s, unsigned pin) { struct pcs_device *pcs; unsigned val, mux_bytes; unsigned long offset; size_t pa; pcs = pinctrl_dev_get_drvdata(pctldev); mux_bytes = pcs->width / BITS_PER_BYTE; offset = pin * mux_bytes; val = pcs->read(pcs->base + offset); pa = pcs->res->start + offset; seq_printf(s, "%zx %08x %s ", pa, val, DRIVER_NAME); } static void pcs_dt_free_map(struct pinctrl_dev *pctldev, struct pinctrl_map *map, unsigned num_maps) { struct pcs_device *pcs; pcs = pinctrl_dev_get_drvdata(pctldev); devm_kfree(pcs->dev, map); } static int pcs_dt_node_to_map(struct pinctrl_dev *pctldev, struct device_node *np_config, struct pinctrl_map **map, unsigned *num_maps); static const struct pinctrl_ops pcs_pinctrl_ops = { .get_groups_count = pinctrl_generic_get_group_count, .get_group_name = pinctrl_generic_get_group_name, .get_group_pins = pinctrl_generic_get_group_pins, .pin_dbg_show = pcs_pin_dbg_show, .dt_node_to_map = pcs_dt_node_to_map, .dt_free_map = pcs_dt_free_map, }; static int pcs_get_function(struct pinctrl_dev *pctldev, unsigned pin, struct pcs_function **func) { struct pcs_device *pcs = pinctrl_dev_get_drvdata(pctldev); struct pin_desc *pdesc = pin_desc_get(pctldev, pin); const struct pinctrl_setting_mux *setting; struct function_desc *function; unsigned fselector; /* If pin is not described in DTS & enabled, mux_setting is NULL. */ setting = pdesc->mux_setting; if (!setting) return -ENOTSUPP; fselector = setting->func; function = pinmux_generic_get_function(pctldev, fselector); *func = function->data; if (!(*func)) { dev_err(pcs->dev, "%s could not find function%i\n", __func__, fselector); return -ENOTSUPP; } return 0; } static int pcs_set_mux(struct pinctrl_dev *pctldev, unsigned fselector, unsigned group) { struct pcs_device *pcs; struct function_desc *function; struct pcs_function *func; int i; pcs = pinctrl_dev_get_drvdata(pctldev); /* If function mask is null, needn't enable it. */ if (!pcs->fmask) return 0; function = pinmux_generic_get_function(pctldev, fselector); func = function->data; if (!func) return -EINVAL; dev_dbg(pcs->dev, "enabling %s function%i\n", func->name, fselector); for (i = 0; i < func->nvals; i++) { struct pcs_func_vals *vals; unsigned long flags; unsigned val, mask; vals = &func->vals[i]; raw_spin_lock_irqsave(&pcs->lock, flags); val = pcs->read(vals->reg); if (pcs->bits_per_mux) mask = vals->mask; else mask = pcs->fmask; val &= ~mask; val |= (vals->val & mask); pcs->write(val, vals->reg); raw_spin_unlock_irqrestore(&pcs->lock, flags); } return 0; } static int pcs_request_gpio(struct pinctrl_dev *pctldev, struct pinctrl_gpio_range *range, unsigned pin) { struct pcs_device *pcs = pinctrl_dev_get_drvdata(pctldev); struct pcs_gpiofunc_range *frange = NULL; struct list_head *pos, *tmp; int mux_bytes = 0; unsigned data; /* If function mask is null, return directly. */ if (!pcs->fmask) return -ENOTSUPP; list_for_each_safe(pos, tmp, &pcs->gpiofuncs) { frange = list_entry(pos, struct pcs_gpiofunc_range, node); if (pin >= frange->offset + frange->npins || pin < frange->offset) continue; mux_bytes = pcs->width / BITS_PER_BYTE; if (pcs->bits_per_mux) { int byte_num, offset, pin_shift; byte_num = (pcs->bits_per_pin * pin) / BITS_PER_BYTE; offset = (byte_num / mux_bytes) * mux_bytes; pin_shift = pin % (pcs->width / pcs->bits_per_pin) * pcs->bits_per_pin; data = pcs->read(pcs->base + offset); data &= ~(pcs->fmask << pin_shift); data |= frange->gpiofunc << pin_shift; pcs->write(data, pcs->base + offset); } else { data = pcs->read(pcs->base + pin * mux_bytes); data &= ~pcs->fmask; data |= frange->gpiofunc; pcs->write(data, pcs->base + pin * mux_bytes); } break; } return 0; } static const struct pinmux_ops pcs_pinmux_ops = { .get_functions_count = pinmux_generic_get_function_count, .get_function_name = pinmux_generic_get_function_name, .get_function_groups = pinmux_generic_get_function_groups, .set_mux = pcs_set_mux, .gpio_request_enable = pcs_request_gpio, }; /* Clear BIAS value */ static void pcs_pinconf_clear_bias(struct pinctrl_dev *pctldev, unsigned pin) { unsigned long config; int i; for (i = 0; i < ARRAY_SIZE(pcs_bias); i++) { config = pinconf_to_config_packed(pcs_bias[i], 0); pcs_pinconf_set(pctldev, pin, &config, 1); } } /* * Check whether PIN_CONFIG_BIAS_DISABLE is valid. * It's depend on that PULL_DOWN & PULL_UP configs are all invalid. */ static bool pcs_pinconf_bias_disable(struct pinctrl_dev *pctldev, unsigned pin) { unsigned long config; int i; for (i = 0; i < ARRAY_SIZE(pcs_bias); i++) { config = pinconf_to_config_packed(pcs_bias[i], 0); if (!pcs_pinconf_get(pctldev, pin, &config)) goto out; } return true; out: return false; } static int pcs_pinconf_get(struct pinctrl_dev *pctldev, unsigned pin, unsigned long *config) { struct pcs_device *pcs = pinctrl_dev_get_drvdata(pctldev); struct pcs_function *func; enum pin_config_param param; unsigned offset = 0, data = 0, i, j, ret; ret = pcs_get_function(pctldev, pin, &func); if (ret) return ret; for (i = 0; i < func->nconfs; i++) { param = pinconf_to_config_param(*config); if (param == PIN_CONFIG_BIAS_DISABLE) { if (pcs_pinconf_bias_disable(pctldev, pin)) { *config = 0; return 0; } else { return -ENOTSUPP; } } else if (param != func->conf[i].param) { continue; } offset = pin * (pcs->width / BITS_PER_BYTE); data = pcs->read(pcs->base + offset) & func->conf[i].mask; switch (func->conf[i].param) { /* 4 parameters */ case PIN_CONFIG_BIAS_PULL_DOWN: case PIN_CONFIG_BIAS_PULL_UP: case PIN_CONFIG_INPUT_SCHMITT_ENABLE: if ((data != func->conf[i].enable) || (data == func->conf[i].disable)) return -ENOTSUPP; *config = 0; break; /* 2 parameters */ case PIN_CONFIG_INPUT_SCHMITT: for (j = 0; j < func->nconfs; j++) { switch (func->conf[j].param) { case PIN_CONFIG_INPUT_SCHMITT_ENABLE: if (data != func->conf[j].enable) return -ENOTSUPP; break; default: break; } } *config = data; break; case PIN_CONFIG_DRIVE_STRENGTH: case PIN_CONFIG_SLEW_RATE: case PIN_CONFIG_LOW_POWER_MODE: default: *config = data; break; } return 0; } return -ENOTSUPP; } static int pcs_pinconf_set(struct pinctrl_dev *pctldev, unsigned pin, unsigned long *configs, unsigned num_configs) { struct pcs_device *pcs = pinctrl_dev_get_drvdata(pctldev); struct pcs_function *func; unsigned offset = 0, shift = 0, i, data, ret; u32 arg; int j; ret = pcs_get_function(pctldev, pin, &func); if (ret) return ret; for (j = 0; j < num_configs; j++) { for (i = 0; i < func->nconfs; i++) { if (pinconf_to_config_param(configs[j]) != func->conf[i].param) continue; offset = pin * (pcs->width / BITS_PER_BYTE); data = pcs->read(pcs->base + offset); arg = pinconf_to_config_argument(configs[j]); switch (func->conf[i].param) { /* 2 parameters */ case PIN_CONFIG_INPUT_SCHMITT: case PIN_CONFIG_DRIVE_STRENGTH: case PIN_CONFIG_SLEW_RATE: case PIN_CONFIG_LOW_POWER_MODE: shift = ffs(func->conf[i].mask) - 1; data &= ~func->conf[i].mask; data |= (arg << shift) & func->conf[i].mask; break; /* 4 parameters */ case PIN_CONFIG_BIAS_DISABLE: pcs_pinconf_clear_bias(pctldev, pin); break; case PIN_CONFIG_BIAS_PULL_DOWN: case PIN_CONFIG_BIAS_PULL_UP: if (arg) pcs_pinconf_clear_bias(pctldev, pin); fallthrough; case PIN_CONFIG_INPUT_SCHMITT_ENABLE: data &= ~func->conf[i].mask; if (arg) data |= func->conf[i].enable; else data |= func->conf[i].disable; break; default: return -ENOTSUPP; } pcs->write(data, pcs->base + offset); break; } if (i >= func->nconfs) return -ENOTSUPP; } /* for each config */ return 0; } static int pcs_pinconf_group_get(struct pinctrl_dev *pctldev, unsigned group, unsigned long *config) { const unsigned *pins; unsigned npins, old = 0; int i, ret; ret = pinctrl_generic_get_group_pins(pctldev, group, &pins, &npins); if (ret) return ret; for (i = 0; i < npins; i++) { if (pcs_pinconf_get(pctldev, pins[i], config)) return -ENOTSUPP; /* configs do not match between two pins */ if (i && (old != *config)) return -ENOTSUPP; old = *config; } return 0; } static int pcs_pinconf_group_set(struct pinctrl_dev *pctldev, unsigned group, unsigned long *configs, unsigned num_configs) { const unsigned *pins; unsigned npins; int i, ret; ret = pinctrl_generic_get_group_pins(pctldev, group, &pins, &npins); if (ret) return ret; for (i = 0; i < npins; i++) { if (pcs_pinconf_set(pctldev, pins[i], configs, num_configs)) return -ENOTSUPP; } return 0; } static void pcs_pinconf_dbg_show(struct pinctrl_dev *pctldev, struct seq_file *s, unsigned pin) { } static void pcs_pinconf_group_dbg_show(struct pinctrl_dev *pctldev, struct seq_file *s, unsigned selector) { } static void pcs_pinconf_config_dbg_show(struct pinctrl_dev *pctldev, struct seq_file *s, unsigned long config) { pinconf_generic_dump_config(pctldev, s, config); } static const struct pinconf_ops pcs_pinconf_ops = { .pin_config_get = pcs_pinconf_get, .pin_config_set = pcs_pinconf_set, .pin_config_group_get = pcs_pinconf_group_get, .pin_config_group_set = pcs_pinconf_group_set, .pin_config_dbg_show = pcs_pinconf_dbg_show, .pin_config_group_dbg_show = pcs_pinconf_group_dbg_show, .pin_config_config_dbg_show = pcs_pinconf_config_dbg_show, .is_generic = true, }; /** * pcs_add_pin() - add a pin to the static per controller pin array * @pcs: pcs driver instance * @offset: register offset from base * @pin_pos: unused */ static int pcs_add_pin(struct pcs_device *pcs, unsigned offset, unsigned pin_pos) { struct pcs_soc_data *pcs_soc = &pcs->socdata; struct pinctrl_pin_desc *pin; int i; i = pcs->pins.cur; if (i >= pcs->desc.npins) { dev_err(pcs->dev, "too many pins, max %i\n", pcs->desc.npins); return -ENOMEM; } if (pcs_soc->irq_enable_mask) { unsigned val; val = pcs->read(pcs->base + offset); if (val & pcs_soc->irq_enable_mask) { dev_dbg(pcs->dev, "irq enabled at boot for pin at %lx (%x), clearing\n", (unsigned long)pcs->res->start + offset, val); val &= ~pcs_soc->irq_enable_mask; pcs->write(val, pcs->base + offset); } } pin = &pcs->pins.pa[i]; pin->number = i; pcs->pins.cur++; return i; } /** * pcs_allocate_pin_table() - adds all the pins for the pinctrl driver * @pcs: pcs driver instance * * In case of errors, resources are freed in pcs_free_resources. * * If your hardware needs holes in the address space, then just set * up multiple driver instances. */ static int pcs_allocate_pin_table(struct pcs_device *pcs) { int mux_bytes, nr_pins, i; int num_pins_in_register = 0; mux_bytes = pcs->width / BITS_PER_BYTE; if (pcs->bits_per_mux) { pcs->bits_per_pin = fls(pcs->fmask); nr_pins = (pcs->size * BITS_PER_BYTE) / pcs->bits_per_pin; num_pins_in_register = pcs->width / pcs->bits_per_pin; } else { nr_pins = pcs->size / mux_bytes; } dev_dbg(pcs->dev, "allocating %i pins\n", nr_pins); pcs->pins.pa = devm_kcalloc(pcs->dev, nr_pins, sizeof(*pcs->pins.pa), GFP_KERNEL); if (!pcs->pins.pa) return -ENOMEM; pcs->desc.pins = pcs->pins.pa; pcs->desc.npins = nr_pins; for (i = 0; i < pcs->desc.npins; i++) { unsigned offset; int res; int byte_num; int pin_pos = 0; if (pcs->bits_per_mux) { byte_num = (pcs->bits_per_pin * i) / BITS_PER_BYTE; offset = (byte_num / mux_bytes) * mux_bytes; pin_pos = i % num_pins_in_register; } else { offset = i * mux_bytes; } res = pcs_add_pin(pcs, offset, pin_pos); if (res < 0) { dev_err(pcs->dev, "error adding pins: %i\n", res); return res; } } return 0; } /** * pcs_add_function() - adds a new function to the function list * @pcs: pcs driver instance * @fcn: new function allocated * @name: name of the function * @vals: array of mux register value pairs used by the function * @nvals: number of mux register value pairs * @pgnames: array of pingroup names for the function * @npgnames: number of pingroup names * * Caller must take care of locking. */ static int pcs_add_function(struct pcs_device *pcs, struct pcs_function **fcn, const char *name, struct pcs_func_vals *vals, unsigned int nvals, const char **pgnames, unsigned int npgnames) { struct pcs_function *function; int selector; function = devm_kzalloc(pcs->dev, sizeof(*function), GFP_KERNEL); if (!function) return -ENOMEM; function->vals = vals; function->nvals = nvals; selector = pinmux_generic_add_function(pcs->pctl, name, pgnames, npgnames, function); if (selector < 0) { devm_kfree(pcs->dev, function); *fcn = NULL; } else { *fcn = function; } return selector; } /** * pcs_get_pin_by_offset() - get a pin index based on the register offset * @pcs: pcs driver instance * @offset: register offset from the base * * Note that this is OK as long as the pins are in a static array. */ static int pcs_get_pin_by_offset(struct pcs_device *pcs, unsigned offset) { unsigned index; if (offset >= pcs->size) { dev_err(pcs->dev, "mux offset out of range: 0x%x (0x%x)\n", offset, pcs->size); return -EINVAL; } if (pcs->bits_per_mux) index = (offset * BITS_PER_BYTE) / pcs->bits_per_pin; else index = offset / (pcs->width / BITS_PER_BYTE); return index; } /* * check whether data matches enable bits or disable bits * Return value: 1 for matching enable bits, 0 for matching disable bits, * and negative value for matching failure. */ static int pcs_config_match(unsigned data, unsigned enable, unsigned disable) { int ret = -EINVAL; if (data == enable) ret = 1; else if (data == disable) ret = 0; return ret; } static void add_config(struct pcs_conf_vals **conf, enum pin_config_param param, unsigned value, unsigned enable, unsigned disable, unsigned mask) { (*conf)->param = param; (*conf)->val = value; (*conf)->enable = enable; (*conf)->disable = disable; (*conf)->mask = mask; (*conf)++; } static void add_setting(unsigned long **setting, enum pin_config_param param, unsigned arg) { **setting = pinconf_to_config_packed(param, arg); (*setting)++; } /* add pinconf setting with 2 parameters */ static void pcs_add_conf2(struct pcs_device *pcs, struct device_node *np, const char *name, enum pin_config_param param, struct pcs_conf_vals **conf, unsigned long **settings) { unsigned value[2], shift; int ret; ret = of_property_read_u32_array(np, name, value, 2); if (ret) return; /* set value & mask */ value[0] &= value[1]; shift = ffs(value[1]) - 1; /* skip enable & disable */ add_config(conf, param, value[0], 0, 0, value[1]); add_setting(settings, param, value[0] >> shift); } /* add pinconf setting with 4 parameters */ static void pcs_add_conf4(struct pcs_device *pcs, struct device_node *np, const char *name, enum pin_config_param param, struct pcs_conf_vals **conf, unsigned long **settings) { unsigned value[4]; int ret; /* value to set, enable, disable, mask */ ret = of_property_read_u32_array(np, name, value, 4); if (ret) return; if (!value[3]) { dev_err(pcs->dev, "mask field of the property can't be 0\n"); return; } value[0] &= value[3]; value[1] &= value[3]; value[2] &= value[3]; ret = pcs_config_match(value[0], value[1], value[2]); if (ret < 0) dev_dbg(pcs->dev, "failed to match enable or disable bits\n"); add_config(conf, param, value[0], value[1], value[2], value[3]); add_setting(settings, param, ret); } static int pcs_parse_pinconf(struct pcs_device *pcs, struct device_node *np, struct pcs_function *func, struct pinctrl_map **map) { struct pinctrl_map *m = *map; int i = 0, nconfs = 0; unsigned long *settings = NULL, *s = NULL; struct pcs_conf_vals *conf = NULL; static const struct pcs_conf_type prop2[] = { { "pinctrl-single,drive-strength", PIN_CONFIG_DRIVE_STRENGTH, }, { "pinctrl-single,slew-rate", PIN_CONFIG_SLEW_RATE, }, { "pinctrl-single,input-schmitt", PIN_CONFIG_INPUT_SCHMITT, }, { "pinctrl-single,low-power-mode", PIN_CONFIG_LOW_POWER_MODE, }, }; static const struct pcs_conf_type prop4[] = { { "pinctrl-single,bias-pullup", PIN_CONFIG_BIAS_PULL_UP, }, { "pinctrl-single,bias-pulldown", PIN_CONFIG_BIAS_PULL_DOWN, }, { "pinctrl-single,input-schmitt-enable", PIN_CONFIG_INPUT_SCHMITT_ENABLE, }, }; /* If pinconf isn't supported, don't parse properties in below. */ if (!PCS_HAS_PINCONF) return -ENOTSUPP; /* cacluate how much properties are supported in current node */ for (i = 0; i < ARRAY_SIZE(prop2); i++) { if (of_find_property(np, prop2[i].name, NULL)) nconfs++; } for (i = 0; i < ARRAY_SIZE(prop4); i++) { if (of_find_property(np, prop4[i].name, NULL)) nconfs++; } if (!nconfs) return -ENOTSUPP; func->conf = devm_kcalloc(pcs->dev, nconfs, sizeof(struct pcs_conf_vals), GFP_KERNEL); if (!func->conf) return -ENOMEM; func->nconfs = nconfs; conf = &(func->conf[0]); m++; settings = devm_kcalloc(pcs->dev, nconfs, sizeof(unsigned long), GFP_KERNEL); if (!settings) return -ENOMEM; s = &settings[0]; for (i = 0; i < ARRAY_SIZE(prop2); i++) pcs_add_conf2(pcs, np, prop2[i].name, prop2[i].param, &conf, &s); for (i = 0; i < ARRAY_SIZE(prop4); i++) pcs_add_conf4(pcs, np, prop4[i].name, prop4[i].param, &conf, &s); m->type = PIN_MAP_TYPE_CONFIGS_GROUP; m->data.configs.group_or_pin = np->name; m->data.configs.configs = settings; m->data.configs.num_configs = nconfs; return 0; } /** * pcs_parse_one_pinctrl_entry() - parses a device tree mux entry * @pcs: pinctrl driver instance * @np: device node of the mux entry * @map: map entry * @num_maps: number of map * @pgnames: pingroup names * * Note that this binding currently supports only sets of one register + value. * * Also note that this driver tries to avoid understanding pin and function * names because of the extra bloat they would cause especially in the case of * a large number of pins. This driver just sets what is specified for the board * in the .dts file. Further user space debugging tools can be developed to * decipher the pin and function names using debugfs. * * If you are concerned about the boot time, set up the static pins in * the bootloader, and only set up selected pins as device tree entries. */ static int pcs_parse_one_pinctrl_entry(struct pcs_device *pcs, struct device_node *np, struct pinctrl_map **map, unsigned *num_maps, const char **pgnames) { const char *name = "pinctrl-single,pins"; struct pcs_func_vals *vals; int rows, *pins, found = 0, res = -ENOMEM, i, fsel, gsel; struct pcs_function *function = NULL; rows = pinctrl_count_index_with_args(np, name); if (rows <= 0) { dev_err(pcs->dev, "Invalid number of rows: %d\n", rows); return -EINVAL; } vals = devm_kcalloc(pcs->dev, rows, sizeof(*vals), GFP_KERNEL); if (!vals) return -ENOMEM; pins = devm_kcalloc(pcs->dev, rows, sizeof(*pins), GFP_KERNEL); if (!pins) goto free_vals; for (i = 0; i < rows; i++) { struct of_phandle_args pinctrl_spec; unsigned int offset; int pin; res = pinctrl_parse_index_with_args(np, name, i, &pinctrl_spec); if (res) return res; if (pinctrl_spec.args_count < 2) { dev_err(pcs->dev, "invalid args_count for spec: %i\n", pinctrl_spec.args_count); break; } offset = pinctrl_spec.args[0]; vals[found].reg = pcs->base + offset; switch (pinctrl_spec.args_count) { case 2: vals[found].val = pinctrl_spec.args[1]; break; case 3: vals[found].val = (pinctrl_spec.args[1] | pinctrl_spec.args[2]); break; } dev_dbg(pcs->dev, "%pOFn index: 0x%x value: 0x%x\n", pinctrl_spec.np, offset, pinctrl_spec.args[1]); pin = pcs_get_pin_by_offset(pcs, offset); if (pin < 0) { dev_err(pcs->dev, "could not add functions for %pOFn %ux\n", np, offset); break; } pins[found++] = pin; } pgnames[0] = np->name; mutex_lock(&pcs->mutex); fsel = pcs_add_function(pcs, &function, np->name, vals, found, pgnames, 1); if (fsel < 0) { res = fsel; goto free_pins; } gsel = pinctrl_generic_add_group(pcs->pctl, np->name, pins, found, pcs); if (gsel < 0) { res = gsel; goto free_function; } (*map)->type = PIN_MAP_TYPE_MUX_GROUP; (*map)->data.mux.group = np->name; (*map)->data.mux.function = np->name; if (PCS_HAS_PINCONF && function) { res = pcs_parse_pinconf(pcs, np, function, map); if (res == 0) *num_maps = 2; else if (res == -ENOTSUPP) *num_maps = 1; else goto free_pingroups; } else { *num_maps = 1; } mutex_unlock(&pcs->mutex); return 0; free_pingroups: pinctrl_generic_remove_group(pcs->pctl, gsel); *num_maps = 1; free_function: pinmux_generic_remove_function(pcs->pctl, fsel); free_pins: mutex_unlock(&pcs->mutex); devm_kfree(pcs->dev, pins); free_vals: devm_kfree(pcs->dev, vals); return res; } static int pcs_parse_bits_in_pinctrl_entry(struct pcs_device *pcs, struct device_node *np, struct pinctrl_map **map, unsigned *num_maps, const char **pgnames) { const char *name = "pinctrl-single,bits"; struct pcs_func_vals *vals; int rows, *pins, found = 0, res = -ENOMEM, i, fsel, gsel; int npins_in_row; struct pcs_function *function = NULL; rows = pinctrl_count_index_with_args(np, name); if (rows <= 0) { dev_err(pcs->dev, "Invalid number of rows: %d\n", rows); return -EINVAL; } npins_in_row = pcs->width / pcs->bits_per_pin; vals = devm_kzalloc(pcs->dev, array3_size(rows, npins_in_row, sizeof(*vals)), GFP_KERNEL); if (!vals) return -ENOMEM; pins = devm_kzalloc(pcs->dev, array3_size(rows, npins_in_row, sizeof(*pins)), GFP_KERNEL); if (!pins) goto free_vals; for (i = 0; i < rows; i++) { struct of_phandle_args pinctrl_spec; unsigned offset, val; unsigned mask, bit_pos, val_pos, mask_pos, submask; unsigned pin_num_from_lsb; int pin; res = pinctrl_parse_index_with_args(np, name, i, &pinctrl_spec); if (res) return res; if (pinctrl_spec.args_count < 3) { dev_err(pcs->dev, "invalid args_count for spec: %i\n", pinctrl_spec.args_count); break; } /* Index plus two value cells */ offset = pinctrl_spec.args[0]; val = pinctrl_spec.args[1]; mask = pinctrl_spec.args[2]; dev_dbg(pcs->dev, "%pOFn index: 0x%x value: 0x%x mask: 0x%x\n", pinctrl_spec.np, offset, val, mask); /* Parse pins in each row from LSB */ while (mask) { bit_pos = __ffs(mask); pin_num_from_lsb = bit_pos / pcs->bits_per_pin; mask_pos = ((pcs->fmask) << bit_pos); val_pos = val & mask_pos; submask = mask & mask_pos; if ((mask & mask_pos) == 0) { dev_err(pcs->dev, "Invalid mask for %pOFn at 0x%x\n", np, offset); break; } mask &= ~mask_pos; if (submask != mask_pos) { dev_warn(pcs->dev, "Invalid submask 0x%x for %pOFn at 0x%x\n", submask, np, offset); continue; } vals[found].mask = submask; vals[found].reg = pcs->base + offset; vals[found].val = val_pos; pin = pcs_get_pin_by_offset(pcs, offset); if (pin < 0) { dev_err(pcs->dev, "could not add functions for %pOFn %ux\n", np, offset); break; } pins[found++] = pin + pin_num_from_lsb; } } pgnames[0] = np->name; mutex_lock(&pcs->mutex); fsel = pcs_add_function(pcs, &function, np->name, vals, found, pgnames, 1); if (fsel < 0) { res = fsel; goto free_pins; } gsel = pinctrl_generic_add_group(pcs->pctl, np->name, pins, found, pcs); if (gsel < 0) { res = gsel; goto free_function; } (*map)->type = PIN_MAP_TYPE_MUX_GROUP; (*map)->data.mux.group = np->name; (*map)->data.mux.function = np->name; if (PCS_HAS_PINCONF) { dev_err(pcs->dev, "pinconf not supported\n"); goto free_pingroups; } *num_maps = 1; mutex_unlock(&pcs->mutex); return 0; free_pingroups: pinctrl_generic_remove_group(pcs->pctl, gsel); *num_maps = 1; free_function: pinmux_generic_remove_function(pcs->pctl, fsel); free_pins: mutex_unlock(&pcs->mutex); devm_kfree(pcs->dev, pins); free_vals: devm_kfree(pcs->dev, vals); return res; } /** * pcs_dt_node_to_map() - allocates and parses pinctrl maps * @pctldev: pinctrl instance * @np_config: device tree pinmux entry * @map: array of map entries * @num_maps: number of maps */ static int pcs_dt_node_to_map(struct pinctrl_dev *pctldev, struct device_node *np_config, struct pinctrl_map **map, unsigned *num_maps) { struct pcs_device *pcs; const char **pgnames; int ret; pcs = pinctrl_dev_get_drvdata(pctldev); /* create 2 maps. One is for pinmux, and the other is for pinconf. */ *map = devm_kcalloc(pcs->dev, 2, sizeof(**map), GFP_KERNEL); if (!*map) return -ENOMEM; *num_maps = 0; pgnames = devm_kzalloc(pcs->dev, sizeof(*pgnames), GFP_KERNEL); if (!pgnames) { ret = -ENOMEM; goto free_map; } if (pcs->bits_per_mux) { ret = pcs_parse_bits_in_pinctrl_entry(pcs, np_config, map, num_maps, pgnames); if (ret < 0) { dev_err(pcs->dev, "no pins entries for %pOFn\n", np_config); goto free_pgnames; } } else { ret = pcs_parse_one_pinctrl_entry(pcs, np_config, map, num_maps, pgnames); if (ret < 0) { dev_err(pcs->dev, "no pins entries for %pOFn\n", np_config); goto free_pgnames; } } return 0; free_pgnames: devm_kfree(pcs->dev, pgnames); free_map: devm_kfree(pcs->dev, *map); return ret; } /** * pcs_irq_free() - free interrupt * @pcs: pcs driver instance */ static void pcs_irq_free(struct pcs_device *pcs) { struct pcs_soc_data *pcs_soc = &pcs->socdata; if (pcs_soc->irq < 0) return; if (pcs->domain) irq_domain_remove(pcs->domain); if (PCS_QUIRK_HAS_SHARED_IRQ) free_irq(pcs_soc->irq, pcs_soc); else irq_set_chained_handler(pcs_soc->irq, NULL); } /** * pcs_free_resources() - free memory used by this driver * @pcs: pcs driver instance */ static void pcs_free_resources(struct pcs_device *pcs) { pcs_irq_free(pcs); pinctrl_unregister(pcs->pctl); #if IS_BUILTIN(CONFIG_PINCTRL_SINGLE) if (pcs->missing_nr_pinctrl_cells) of_remove_property(pcs->np, pcs->missing_nr_pinctrl_cells); #endif } static int pcs_add_gpio_func(struct device_node *node, struct pcs_device *pcs) { const char *propname = "pinctrl-single,gpio-range"; const char *cellname = "#pinctrl-single,gpio-range-cells"; struct of_phandle_args gpiospec; struct pcs_gpiofunc_range *range; int ret, i; for (i = 0; ; i++) { ret = of_parse_phandle_with_args(node, propname, cellname, i, &gpiospec); /* Do not treat it as error. Only treat it as end condition. */ if (ret) { ret = 0; break; } range = devm_kzalloc(pcs->dev, sizeof(*range), GFP_KERNEL); if (!range) { ret = -ENOMEM; break; } range->offset = gpiospec.args[0]; range->npins = gpiospec.args[1]; range->gpiofunc = gpiospec.args[2]; mutex_lock(&pcs->mutex); list_add_tail(&range->node, &pcs->gpiofuncs); mutex_unlock(&pcs->mutex); } return ret; } /** * struct pcs_interrupt * @reg: virtual address of interrupt register * @hwirq: hardware irq number * @irq: virtual irq number * @node: list node */ struct pcs_interrupt { void __iomem *reg; irq_hw_number_t hwirq; unsigned int irq; struct list_head node; }; /** * pcs_irq_set() - enables or disables an interrupt * @pcs_soc: SoC specific settings * @irq: interrupt * @enable: enable or disable the interrupt * * Note that this currently assumes one interrupt per pinctrl * register that is typically used for wake-up events. */ static inline void pcs_irq_set(struct pcs_soc_data *pcs_soc, int irq, const bool enable) { struct pcs_device *pcs; struct list_head *pos; unsigned mask; pcs = container_of(pcs_soc, struct pcs_device, socdata); list_for_each(pos, &pcs->irqs) { struct pcs_interrupt *pcswi; unsigned soc_mask; pcswi = list_entry(pos, struct pcs_interrupt, node); if (irq != pcswi->irq) continue; soc_mask = pcs_soc->irq_enable_mask; raw_spin_lock(&pcs->lock); mask = pcs->read(pcswi->reg); if (enable) mask |= soc_mask; else mask &= ~soc_mask; pcs->write(mask, pcswi->reg); /* flush posted write */ mask = pcs->read(pcswi->reg); raw_spin_unlock(&pcs->lock); } if (pcs_soc->rearm) pcs_soc->rearm(); } /** * pcs_irq_mask() - mask pinctrl interrupt * @d: interrupt data */ static void pcs_irq_mask(struct irq_data *d) { struct pcs_soc_data *pcs_soc = irq_data_get_irq_chip_data(d); pcs_irq_set(pcs_soc, d->irq, false); } /** * pcs_irq_unmask() - unmask pinctrl interrupt * @d: interrupt data */ static void pcs_irq_unmask(struct irq_data *d) { struct pcs_soc_data *pcs_soc = irq_data_get_irq_chip_data(d); pcs_irq_set(pcs_soc, d->irq, true); } /** * pcs_irq_set_wake() - toggle the suspend and resume wake up * @d: interrupt data * @state: wake-up state * * Note that this should be called only for suspend and resume. * For runtime PM, the wake-up events should be enabled by default. */ static int pcs_irq_set_wake(struct irq_data *d, unsigned int state) { if (state) pcs_irq_unmask(d); else pcs_irq_mask(d); return 0; } /** * pcs_irq_handle() - common interrupt handler * @pcs_soc: SoC specific settings * * Note that this currently assumes we have one interrupt bit per * mux register. This interrupt is typically used for wake-up events. * For more complex interrupts different handlers can be specified. */ static int pcs_irq_handle(struct pcs_soc_data *pcs_soc) { struct pcs_device *pcs; struct list_head *pos; int count = 0; pcs = container_of(pcs_soc, struct pcs_device, socdata); list_for_each(pos, &pcs->irqs) { struct pcs_interrupt *pcswi; unsigned mask; pcswi = list_entry(pos, struct pcs_interrupt, node); raw_spin_lock(&pcs->lock); mask = pcs->read(pcswi->reg); raw_spin_unlock(&pcs->lock); if (mask & pcs_soc->irq_status_mask) { generic_handle_irq(irq_find_mapping(pcs->domain, pcswi->hwirq)); count++; } } return count; } /** * pcs_irq_handler() - handler for the shared interrupt case * @irq: interrupt * @d: data * * Use this for cases where multiple instances of * pinctrl-single share a single interrupt like on omaps. */ static irqreturn_t pcs_irq_handler(int irq, void *d) { struct pcs_soc_data *pcs_soc = d; return pcs_irq_handle(pcs_soc) ? IRQ_HANDLED : IRQ_NONE; } /** * pcs_irq_handle() - handler for the dedicated chained interrupt case * @desc: interrupt descriptor * * Use this if you have a separate interrupt for each * pinctrl-single instance. */ static void pcs_irq_chain_handler(struct irq_desc *desc) { struct pcs_soc_data *pcs_soc = irq_desc_get_handler_data(desc); struct irq_chip *chip; chip = irq_desc_get_chip(desc); chained_irq_enter(chip, desc); pcs_irq_handle(pcs_soc); /* REVISIT: export and add handle_bad_irq(irq, desc)? */ chained_irq_exit(chip, desc); } static int pcs_irqdomain_map(struct irq_domain *d, unsigned int irq, irq_hw_number_t hwirq) { struct pcs_soc_data *pcs_soc = d->host_data; struct pcs_device *pcs; struct pcs_interrupt *pcswi; pcs = container_of(pcs_soc, struct pcs_device, socdata); pcswi = devm_kzalloc(pcs->dev, sizeof(*pcswi), GFP_KERNEL); if (!pcswi) return -ENOMEM; pcswi->reg = pcs->base + hwirq; pcswi->hwirq = hwirq; pcswi->irq = irq; mutex_lock(&pcs->mutex); list_add_tail(&pcswi->node, &pcs->irqs); mutex_unlock(&pcs->mutex); irq_set_chip_data(irq, pcs_soc); irq_set_chip_and_handler(irq, &pcs->chip, handle_level_irq); irq_set_lockdep_class(irq, &pcs_lock_class, &pcs_request_class); irq_set_noprobe(irq); return 0; } static const struct irq_domain_ops pcs_irqdomain_ops = { .map = pcs_irqdomain_map, .xlate = irq_domain_xlate_onecell, }; /** * pcs_irq_init_chained_handler() - set up a chained interrupt handler * @pcs: pcs driver instance * @np: device node pointer */ static int pcs_irq_init_chained_handler(struct pcs_device *pcs, struct device_node *np) { struct pcs_soc_data *pcs_soc = &pcs->socdata; const char *name = "pinctrl"; int num_irqs; if (!pcs_soc->irq_enable_mask || !pcs_soc->irq_status_mask) { pcs_soc->irq = -1; return -EINVAL; } INIT_LIST_HEAD(&pcs->irqs); pcs->chip.name = name; pcs->chip.irq_ack = pcs_irq_mask; pcs->chip.irq_mask = pcs_irq_mask; pcs->chip.irq_unmask = pcs_irq_unmask; pcs->chip.irq_set_wake = pcs_irq_set_wake; if (PCS_QUIRK_HAS_SHARED_IRQ) { int res; res = request_irq(pcs_soc->irq, pcs_irq_handler, IRQF_SHARED | IRQF_NO_SUSPEND | IRQF_NO_THREAD, name, pcs_soc); if (res) { pcs_soc->irq = -1; return res; } } else { irq_set_chained_handler_and_data(pcs_soc->irq, pcs_irq_chain_handler, pcs_soc); } /* * We can use the register offset as the hardirq * number as irq_domain_add_simple maps them lazily. * This way we can easily support more than one * interrupt per function if needed. */ num_irqs = pcs->size; pcs->domain = irq_domain_add_simple(np, num_irqs, 0, &pcs_irqdomain_ops, pcs_soc); if (!pcs->domain) { irq_set_chained_handler(pcs_soc->irq, NULL); return -EINVAL; } return 0; } #ifdef CONFIG_PM static int pcs_save_context(struct pcs_device *pcs) { int i, mux_bytes; u64 *regsl; u32 *regsw; u16 *regshw; mux_bytes = pcs->width / BITS_PER_BYTE; if (!pcs->saved_vals) { pcs->saved_vals = devm_kzalloc(pcs->dev, pcs->size, GFP_ATOMIC); if (!pcs->saved_vals) return -ENOMEM; } switch (pcs->width) { case 64: regsl = pcs->saved_vals; for (i = 0; i < pcs->size; i += mux_bytes) *regsl++ = pcs->read(pcs->base + i); break; case 32: regsw = pcs->saved_vals; for (i = 0; i < pcs->size; i += mux_bytes) *regsw++ = pcs->read(pcs->base + i); break; case 16: regshw = pcs->saved_vals; for (i = 0; i < pcs->size; i += mux_bytes) *regshw++ = pcs->read(pcs->base + i); break; } return 0; } static void pcs_restore_context(struct pcs_device *pcs) { int i, mux_bytes; u64 *regsl; u32 *regsw; u16 *regshw; mux_bytes = pcs->width / BITS_PER_BYTE; switch (pcs->width) { case 64: regsl = pcs->saved_vals; for (i = 0; i < pcs->size; i += mux_bytes) pcs->write(*regsl++, pcs->base + i); break; case 32: regsw = pcs->saved_vals; for (i = 0; i < pcs->size; i += mux_bytes) pcs->write(*regsw++, pcs->base + i); break; case 16: regshw = pcs->saved_vals; for (i = 0; i < pcs->size; i += mux_bytes) pcs->write(*regshw++, pcs->base + i); break; } } static int pinctrl_single_suspend(struct platform_device *pdev, pm_message_t state) { struct pcs_device *pcs; pcs = platform_get_drvdata(pdev); if (!pcs) return -EINVAL; if (pcs->flags & PCS_CONTEXT_LOSS_OFF) { int ret; ret = pcs_save_context(pcs); if (ret < 0) return ret; } return pinctrl_force_sleep(pcs->pctl); } static int pinctrl_single_resume(struct platform_device *pdev) { struct pcs_device *pcs; pcs = platform_get_drvdata(pdev); if (!pcs) return -EINVAL; if (pcs->flags & PCS_CONTEXT_LOSS_OFF) pcs_restore_context(pcs); return pinctrl_force_default(pcs->pctl); } #endif /** * pcs_quirk_missing_pinctrl_cells - handle legacy binding * @pcs: pinctrl driver instance * @np: device tree node * @cells: number of cells * * Handle legacy binding with no #pinctrl-cells. This should be * always two pinctrl-single,bit-per-mux and one for others. * At some point we may want to consider removing this. */ static int pcs_quirk_missing_pinctrl_cells(struct pcs_device *pcs, struct device_node *np, int cells) { struct property *p; const char *name = "#pinctrl-cells"; int error; u32 val; error = of_property_read_u32(np, name, &val); if (!error) return 0; dev_warn(pcs->dev, "please update dts to use %s = <%i>\n", name, cells); p = devm_kzalloc(pcs->dev, sizeof(*p), GFP_KERNEL); if (!p) return -ENOMEM; p->length = sizeof(__be32); p->value = devm_kzalloc(pcs->dev, sizeof(__be32), GFP_KERNEL); if (!p->value) return -ENOMEM; *(__be32 *)p->value = cpu_to_be32(cells); p->name = devm_kstrdup(pcs->dev, name, GFP_KERNEL); if (!p->name) return -ENOMEM; pcs->missing_nr_pinctrl_cells = p; #if IS_BUILTIN(CONFIG_PINCTRL_SINGLE) error = of_add_property(np, pcs->missing_nr_pinctrl_cells); #endif return error; } static int pcs_probe(struct platform_device *pdev) { struct device_node *np = pdev->dev.of_node; struct pcs_pdata *pdata; struct resource *res; struct pcs_device *pcs; const struct pcs_soc_data *soc; int ret; soc = of_device_get_match_data(&pdev->dev); if (WARN_ON(!soc)) return -EINVAL; pcs = devm_kzalloc(&pdev->dev, sizeof(*pcs), GFP_KERNEL); if (!pcs) return -ENOMEM; pcs->dev = &pdev->dev; pcs->np = np; raw_spin_lock_init(&pcs->lock); mutex_init(&pcs->mutex); INIT_LIST_HEAD(&pcs->gpiofuncs); pcs->flags = soc->flags; memcpy(&pcs->socdata, soc, sizeof(*soc)); ret = of_property_read_u32(np, "pinctrl-single,register-width", &pcs->width); if (ret) { dev_err(pcs->dev, "register width not specified\n"); return ret; } ret = of_property_read_u32(np, "pinctrl-single,function-mask", &pcs->fmask); if (!ret) { pcs->fshift = __ffs(pcs->fmask); pcs->fmax = pcs->fmask >> pcs->fshift; } else { /* If mask property doesn't exist, function mux is invalid. */ pcs->fmask = 0; pcs->fshift = 0; pcs->fmax = 0; } ret = of_property_read_u32(np, "pinctrl-single,function-off", &pcs->foff); if (ret) pcs->foff = PCS_OFF_DISABLED; pcs->bits_per_mux = of_property_read_bool(np, "pinctrl-single,bit-per-mux"); ret = pcs_quirk_missing_pinctrl_cells(pcs, np, pcs->bits_per_mux ? 2 : 1); if (ret) { dev_err(&pdev->dev, "unable to patch #pinctrl-cells\n"); return ret; } res = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!res) { dev_err(pcs->dev, "could not get resource\n"); return -ENODEV; } pcs->res = devm_request_mem_region(pcs->dev, res->start, resource_size(res), DRIVER_NAME); if (!pcs->res) { dev_err(pcs->dev, "could not get mem_region\n"); return -EBUSY; } pcs->size = resource_size(pcs->res); pcs->base = devm_ioremap(pcs->dev, pcs->res->start, pcs->size); if (!pcs->base) { dev_err(pcs->dev, "could not ioremap\n"); return -ENODEV; } platform_set_drvdata(pdev, pcs); switch (pcs->width) { case 8: pcs->read = pcs_readb; pcs->write = pcs_writeb; break; case 16: pcs->read = pcs_readw; pcs->write = pcs_writew; break; case 32: pcs->read = pcs_readl; pcs->write = pcs_writel; break; default: break; } pcs->desc.name = DRIVER_NAME; pcs->desc.pctlops = &pcs_pinctrl_ops; pcs->desc.pmxops = &pcs_pinmux_ops; if (PCS_HAS_PINCONF) pcs->desc.confops = &pcs_pinconf_ops; pcs->desc.owner = THIS_MODULE; ret = pcs_allocate_pin_table(pcs); if (ret < 0) goto free; ret = pinctrl_register_and_init(&pcs->desc, pcs->dev, pcs, &pcs->pctl); if (ret) { dev_err(pcs->dev, "could not register single pinctrl driver\n"); goto free; } ret = pcs_add_gpio_func(np, pcs); if (ret < 0) goto free; pcs->socdata.irq = irq_of_parse_and_map(np, 0); if (pcs->socdata.irq) pcs->flags |= PCS_FEAT_IRQ; /* We still need auxdata for some omaps for PRM interrupts */ pdata = dev_get_platdata(&pdev->dev); if (pdata) { if (pdata->rearm) pcs->socdata.rearm = pdata->rearm; if (pdata->irq) { pcs->socdata.irq = pdata->irq; pcs->flags |= PCS_FEAT_IRQ; } } if (PCS_HAS_IRQ) { ret = pcs_irq_init_chained_handler(pcs, np); if (ret < 0) dev_warn(pcs->dev, "initialized with no interrupts\n"); } dev_info(pcs->dev, "%i pins, size %u\n", pcs->desc.npins, pcs->size); return pinctrl_enable(pcs->pctl); free: pcs_free_resources(pcs); return ret; } static int pcs_remove(struct platform_device *pdev) { struct pcs_device *pcs = platform_get_drvdata(pdev); if (!pcs) return 0; pcs_free_resources(pcs); return 0; } static const struct pcs_soc_data pinctrl_single_omap_wkup = { .flags = PCS_QUIRK_SHARED_IRQ, .irq_enable_mask = (1 << 14), /* OMAP_WAKEUP_EN */ .irq_status_mask = (1 << 15), /* OMAP_WAKEUP_EVENT */ }; static const struct pcs_soc_data pinctrl_single_dra7 = { .irq_enable_mask = (1 << 24), /* WAKEUPENABLE */ .irq_status_mask = (1 << 25), /* WAKEUPEVENT */ }; static const struct pcs_soc_data pinctrl_single_am437x = { .flags = PCS_QUIRK_SHARED_IRQ | PCS_CONTEXT_LOSS_OFF, .irq_enable_mask = (1 << 29), /* OMAP_WAKEUP_EN */ .irq_status_mask = (1 << 30), /* OMAP_WAKEUP_EVENT */ }; static const struct pcs_soc_data pinctrl_single = { }; static const struct pcs_soc_data pinconf_single = { .flags = PCS_FEAT_PINCONF, }; static const struct of_device_id pcs_of_match[] = { { .compatible = "ti,omap3-padconf", .data = &pinctrl_single_omap_wkup }, { .compatible = "ti,omap4-padconf", .data = &pinctrl_single_omap_wkup }, { .compatible = "ti,omap5-padconf", .data = &pinctrl_single_omap_wkup }, { .compatible = "ti,dra7-padconf", .data = &pinctrl_single_dra7 }, { .compatible = "ti,am437-padconf", .data = &pinctrl_single_am437x }, { .compatible = "pinctrl-single", .data = &pinctrl_single }, { .compatible = "pinconf-single", .data = &pinconf_single }, { }, }; MODULE_DEVICE_TABLE(of, pcs_of_match); static struct platform_driver pcs_driver = { .probe = pcs_probe, .remove = pcs_remove, .driver = { .name = DRIVER_NAME, .of_match_table = pcs_of_match, }, #ifdef CONFIG_PM .suspend = pinctrl_single_suspend, .resume = pinctrl_single_resume, #endif }; module_platform_driver(pcs_driver); MODULE_AUTHOR("Tony Lindgren <tony@atomide.com>"); MODULE_DESCRIPTION("One-register-per-pin type device tree based pinctrl driver"); MODULE_LICENSE("GPL v2");
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