[Feature]add MT2731_MP2_MR2_SVN388 baseline version
Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/drivers/pinctrl/pinctrl-single.c b/src/kernel/linux/v4.14/drivers/pinctrl/pinctrl-single.c
new file mode 100644
index 0000000..f751b5c
--- /dev/null
+++ b/src/kernel/linux/v4.14/drivers/pinctrl/pinctrl-single.c
@@ -0,0 +1,1856 @@
+/*
+ * 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
+ */
+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
+ * @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
+ * @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;
+ unsigned size;
+ struct device *dev;
+ struct device_node *np;
+ struct pinctrl_dev *pctl;
+ unsigned flags;
+#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;
+
+/*
+ * 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;
+ data = pcs->read(pcs->base + pin * mux_bytes) & ~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);
+ /* fall through */
+ 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
+ */
+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_kzalloc(pcs->dev,
+ sizeof(*pcs->pins.pa) * nr_pins,
+ 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
+ * @np: device node of the mux entry
+ * @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
+ */
+static struct pcs_function *pcs_add_function(struct pcs_device *pcs,
+ struct device_node *np,
+ const char *name,
+ struct pcs_func_vals *vals,
+ unsigned nvals,
+ const char **pgnames,
+ unsigned npgnames)
+{
+ struct pcs_function *function;
+ int res;
+
+ function = devm_kzalloc(pcs->dev, sizeof(*function), GFP_KERNEL);
+ if (!function)
+ return NULL;
+
+ function->vals = vals;
+ function->nvals = nvals;
+
+ res = pinmux_generic_add_function(pcs->pctl, name,
+ pgnames, npgnames,
+ function);
+ if (res)
+ return NULL;
+
+ return function;
+}
+
+/**
+ * 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;
+ 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, },
+ };
+ 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_kzalloc(pcs->dev,
+ sizeof(struct pcs_conf_vals) * nconfs,
+ GFP_KERNEL);
+ if (!func->conf)
+ return -ENOMEM;
+ func->nconfs = nconfs;
+ conf = &(func->conf[0]);
+ m++;
+ settings = devm_kzalloc(pcs->dev, sizeof(unsigned long) * nconfs,
+ 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;
+}
+
+/**
+ * smux_parse_one_pinctrl_entry() - parses a device tree mux entry
+ * @pctldev: pin controller device
+ * @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;
+ struct pcs_function *function;
+
+ 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_kzalloc(pcs->dev, sizeof(*vals) * rows, GFP_KERNEL);
+ if (!vals)
+ return -ENOMEM;
+
+ pins = devm_kzalloc(pcs->dev, sizeof(*pins) * rows, 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;
+ }
+
+ /* Index plus one value cell */
+ offset = pinctrl_spec.args[0];
+ vals[found].reg = pcs->base + offset;
+ vals[found].val = pinctrl_spec.args[1];
+
+ dev_dbg(pcs->dev, "%s index: 0x%x value: 0x%x\n",
+ pinctrl_spec.np->name, 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 %s %ux\n",
+ np->name, offset);
+ break;
+ }
+ pins[found++] = pin;
+ }
+
+ pgnames[0] = np->name;
+ function = pcs_add_function(pcs, np, np->name, vals, found, pgnames, 1);
+ if (!function) {
+ res = -ENOMEM;
+ goto free_pins;
+ }
+
+ res = pinctrl_generic_add_group(pcs->pctl, np->name, pins, found, pcs);
+ if (res < 0)
+ 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) {
+ 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;
+ }
+ return 0;
+
+free_pingroups:
+ pinctrl_generic_remove_last_group(pcs->pctl);
+ *num_maps = 1;
+free_function:
+ pinmux_generic_remove_last_function(pcs->pctl);
+
+free_pins:
+ 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;
+ int npins_in_row;
+ struct pcs_function *function;
+
+ 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, sizeof(*vals) * rows * npins_in_row,
+ GFP_KERNEL);
+ if (!vals)
+ return -ENOMEM;
+
+ pins = devm_kzalloc(pcs->dev, sizeof(*pins) * rows * npins_in_row,
+ 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, "%s index: 0x%x value: 0x%x mask: 0x%x\n",
+ pinctrl_spec.np->name, 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 %s at 0x%x\n",
+ np->name, offset);
+ break;
+ }
+
+ mask &= ~mask_pos;
+
+ if (submask != mask_pos) {
+ dev_warn(pcs->dev,
+ "Invalid submask 0x%x for %s at 0x%x\n",
+ submask, np->name, 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 %s %ux\n",
+ np->name, offset);
+ break;
+ }
+ pins[found++] = pin + pin_num_from_lsb;
+ }
+ }
+
+ pgnames[0] = np->name;
+ function = pcs_add_function(pcs, np, np->name, vals, found, pgnames, 1);
+ if (!function) {
+ res = -ENOMEM;
+ goto free_pins;
+ }
+
+ res = pinctrl_generic_add_group(pcs->pctl, np->name, pins, found, pcs);
+ if (res < 0)
+ 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;
+ return 0;
+
+free_pingroups:
+ pinctrl_generic_remove_last_group(pcs->pctl);
+ *num_maps = 1;
+free_function:
+ pinmux_generic_remove_last_function(pcs->pctl);
+free_pins:
+ 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_kzalloc(pcs->dev, sizeof(**map) * 2, 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 %s\n",
+ np_config->name);
+ 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 %s\n",
+ np_config->name);
+ 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;
+}
+/**
+ * @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
+ *
+ * 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_irq: interrupt data
+ *
+ * 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
+ * @irq: interrupt
+ * @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);
+
+ return;
+}
+
+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);
+ 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 pinctrl_single_suspend(struct platform_device *pdev,
+ pm_message_t state)
+{
+ struct pcs_device *pcs;
+
+ pcs = platform_get_drvdata(pdev);
+ if (!pcs)
+ return -EINVAL;
+
+ 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;
+
+ 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) {
+ dev_err(&pdev->dev, "could not allocate\n");
+ 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 at pa %p size %u\n",
+ pcs->desc.npins, pcs->base, 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,
+ .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");