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-rw-r--r--drivers/pinctrl/sunxi/pinctrl-sunxi.c1675
1 files changed, 1675 insertions, 0 deletions
diff --git a/drivers/pinctrl/sunxi/pinctrl-sunxi.c b/drivers/pinctrl/sunxi/pinctrl-sunxi.c
new file mode 100644
index 000000000..6c04027d0
--- /dev/null
+++ b/drivers/pinctrl/sunxi/pinctrl-sunxi.c
@@ -0,0 +1,1675 @@
+/*
+ * Allwinner A1X SoCs pinctrl driver.
+ *
+ * Copyright (C) 2012 Maxime Ripard
+ *
+ * Maxime Ripard <maxime.ripard@free-electrons.com>
+ *
+ * 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/io.h>
+#include <linux/clk.h>
+#include <linux/gpio/driver.h>
+#include <linux/interrupt.h>
+#include <linux/irqdomain.h>
+#include <linux/irqchip/chained_irq.h>
+#include <linux/export.h>
+#include <linux/of.h>
+#include <linux/of_clk.h>
+#include <linux/of_address.h>
+#include <linux/of_device.h>
+#include <linux/of_irq.h>
+#include <linux/pinctrl/consumer.h>
+#include <linux/pinctrl/machine.h>
+#include <linux/pinctrl/pinctrl.h>
+#include <linux/pinctrl/pinconf-generic.h>
+#include <linux/pinctrl/pinmux.h>
+#include <linux/regulator/consumer.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+
+#include <dt-bindings/pinctrl/sun4i-a10.h>
+
+#include "../core.h"
+#include "pinctrl-sunxi.h"
+
+/*
+ * These lock classes tell lockdep that GPIO IRQs are in a different
+ * category than their parents, so it won't report false recursion.
+ */
+static struct lock_class_key sunxi_pinctrl_irq_lock_class;
+static struct lock_class_key sunxi_pinctrl_irq_request_class;
+
+static struct irq_chip sunxi_pinctrl_edge_irq_chip;
+static struct irq_chip sunxi_pinctrl_level_irq_chip;
+
+/*
+ * The sunXi PIO registers are organized as a series of banks, with registers
+ * for each bank in the following order:
+ * - Mux config
+ * - Data value
+ * - Drive level
+ * - Pull direction
+ *
+ * Multiple consecutive registers are used for fields wider than one bit.
+ *
+ * The following functions calculate the register and the bit offset to access.
+ * They take a pin number which is relative to the start of the current device.
+ */
+static void sunxi_mux_reg(const struct sunxi_pinctrl *pctl,
+ u32 pin, u32 *reg, u32 *shift, u32 *mask)
+{
+ u32 bank = pin / PINS_PER_BANK;
+ u32 offset = pin % PINS_PER_BANK * MUX_FIELD_WIDTH;
+
+ *reg = bank * pctl->bank_mem_size + MUX_REGS_OFFSET +
+ offset / BITS_PER_TYPE(u32) * sizeof(u32);
+ *shift = offset % BITS_PER_TYPE(u32);
+ *mask = (BIT(MUX_FIELD_WIDTH) - 1) << *shift;
+}
+
+static void sunxi_data_reg(const struct sunxi_pinctrl *pctl,
+ u32 pin, u32 *reg, u32 *shift, u32 *mask)
+{
+ u32 bank = pin / PINS_PER_BANK;
+ u32 offset = pin % PINS_PER_BANK * DATA_FIELD_WIDTH;
+
+ *reg = bank * pctl->bank_mem_size + DATA_REGS_OFFSET +
+ offset / BITS_PER_TYPE(u32) * sizeof(u32);
+ *shift = offset % BITS_PER_TYPE(u32);
+ *mask = (BIT(DATA_FIELD_WIDTH) - 1) << *shift;
+}
+
+static void sunxi_dlevel_reg(const struct sunxi_pinctrl *pctl,
+ u32 pin, u32 *reg, u32 *shift, u32 *mask)
+{
+ u32 bank = pin / PINS_PER_BANK;
+ u32 offset = pin % PINS_PER_BANK * pctl->dlevel_field_width;
+
+ *reg = bank * pctl->bank_mem_size + DLEVEL_REGS_OFFSET +
+ offset / BITS_PER_TYPE(u32) * sizeof(u32);
+ *shift = offset % BITS_PER_TYPE(u32);
+ *mask = (BIT(pctl->dlevel_field_width) - 1) << *shift;
+}
+
+static void sunxi_pull_reg(const struct sunxi_pinctrl *pctl,
+ u32 pin, u32 *reg, u32 *shift, u32 *mask)
+{
+ u32 bank = pin / PINS_PER_BANK;
+ u32 offset = pin % PINS_PER_BANK * PULL_FIELD_WIDTH;
+
+ *reg = bank * pctl->bank_mem_size + pctl->pull_regs_offset +
+ offset / BITS_PER_TYPE(u32) * sizeof(u32);
+ *shift = offset % BITS_PER_TYPE(u32);
+ *mask = (BIT(PULL_FIELD_WIDTH) - 1) << *shift;
+}
+
+static struct sunxi_pinctrl_group *
+sunxi_pinctrl_find_group_by_name(struct sunxi_pinctrl *pctl, const char *group)
+{
+ int i;
+
+ for (i = 0; i < pctl->ngroups; i++) {
+ struct sunxi_pinctrl_group *grp = pctl->groups + i;
+
+ if (!strcmp(grp->name, group))
+ return grp;
+ }
+
+ return NULL;
+}
+
+static struct sunxi_pinctrl_function *
+sunxi_pinctrl_find_function_by_name(struct sunxi_pinctrl *pctl,
+ const char *name)
+{
+ struct sunxi_pinctrl_function *func = pctl->functions;
+ int i;
+
+ for (i = 0; i < pctl->nfunctions; i++) {
+ if (!func[i].name)
+ break;
+
+ if (!strcmp(func[i].name, name))
+ return func + i;
+ }
+
+ return NULL;
+}
+
+static struct sunxi_desc_function *
+sunxi_pinctrl_desc_find_function_by_name(struct sunxi_pinctrl *pctl,
+ const char *pin_name,
+ const char *func_name)
+{
+ int i;
+
+ for (i = 0; i < pctl->desc->npins; i++) {
+ const struct sunxi_desc_pin *pin = pctl->desc->pins + i;
+
+ if (!strcmp(pin->pin.name, pin_name)) {
+ struct sunxi_desc_function *func = pin->functions;
+
+ while (func->name) {
+ if (!strcmp(func->name, func_name) &&
+ (!func->variant ||
+ func->variant & pctl->variant))
+ return func;
+
+ func++;
+ }
+ }
+ }
+
+ return NULL;
+}
+
+static struct sunxi_desc_function *
+sunxi_pinctrl_desc_find_function_by_pin(struct sunxi_pinctrl *pctl,
+ const u16 pin_num,
+ const char *func_name)
+{
+ int i;
+
+ for (i = 0; i < pctl->desc->npins; i++) {
+ const struct sunxi_desc_pin *pin = pctl->desc->pins + i;
+
+ if (pin->pin.number == pin_num) {
+ struct sunxi_desc_function *func = pin->functions;
+
+ while (func->name) {
+ if (!strcmp(func->name, func_name))
+ return func;
+
+ func++;
+ }
+ }
+ }
+
+ return NULL;
+}
+
+static int sunxi_pctrl_get_groups_count(struct pinctrl_dev *pctldev)
+{
+ struct sunxi_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
+
+ return pctl->ngroups;
+}
+
+static const char *sunxi_pctrl_get_group_name(struct pinctrl_dev *pctldev,
+ unsigned group)
+{
+ struct sunxi_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
+
+ return pctl->groups[group].name;
+}
+
+static int sunxi_pctrl_get_group_pins(struct pinctrl_dev *pctldev,
+ unsigned group,
+ const unsigned **pins,
+ unsigned *num_pins)
+{
+ struct sunxi_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
+
+ *pins = (unsigned *)&pctl->groups[group].pin;
+ *num_pins = 1;
+
+ return 0;
+}
+
+static bool sunxi_pctrl_has_bias_prop(struct device_node *node)
+{
+ return of_find_property(node, "bias-pull-up", NULL) ||
+ of_find_property(node, "bias-pull-down", NULL) ||
+ of_find_property(node, "bias-disable", NULL) ||
+ of_find_property(node, "allwinner,pull", NULL);
+}
+
+static bool sunxi_pctrl_has_drive_prop(struct device_node *node)
+{
+ return of_find_property(node, "drive-strength", NULL) ||
+ of_find_property(node, "allwinner,drive", NULL);
+}
+
+static int sunxi_pctrl_parse_bias_prop(struct device_node *node)
+{
+ u32 val;
+
+ /* Try the new style binding */
+ if (of_find_property(node, "bias-pull-up", NULL))
+ return PIN_CONFIG_BIAS_PULL_UP;
+
+ if (of_find_property(node, "bias-pull-down", NULL))
+ return PIN_CONFIG_BIAS_PULL_DOWN;
+
+ if (of_find_property(node, "bias-disable", NULL))
+ return PIN_CONFIG_BIAS_DISABLE;
+
+ /* And fall back to the old binding */
+ if (of_property_read_u32(node, "allwinner,pull", &val))
+ return -EINVAL;
+
+ switch (val) {
+ case SUN4I_PINCTRL_NO_PULL:
+ return PIN_CONFIG_BIAS_DISABLE;
+ case SUN4I_PINCTRL_PULL_UP:
+ return PIN_CONFIG_BIAS_PULL_UP;
+ case SUN4I_PINCTRL_PULL_DOWN:
+ return PIN_CONFIG_BIAS_PULL_DOWN;
+ }
+
+ return -EINVAL;
+}
+
+static int sunxi_pctrl_parse_drive_prop(struct device_node *node)
+{
+ u32 val;
+
+ /* Try the new style binding */
+ if (!of_property_read_u32(node, "drive-strength", &val)) {
+ /* We can't go below 10mA ... */
+ if (val < 10)
+ return -EINVAL;
+
+ /* ... and only up to 40 mA ... */
+ if (val > 40)
+ val = 40;
+
+ /* by steps of 10 mA */
+ return rounddown(val, 10);
+ }
+
+ /* And then fall back to the old binding */
+ if (of_property_read_u32(node, "allwinner,drive", &val))
+ return -EINVAL;
+
+ return (val + 1) * 10;
+}
+
+static const char *sunxi_pctrl_parse_function_prop(struct device_node *node)
+{
+ const char *function;
+ int ret;
+
+ /* Try the generic binding */
+ ret = of_property_read_string(node, "function", &function);
+ if (!ret)
+ return function;
+
+ /* And fall back to our legacy one */
+ ret = of_property_read_string(node, "allwinner,function", &function);
+ if (!ret)
+ return function;
+
+ return NULL;
+}
+
+static const char *sunxi_pctrl_find_pins_prop(struct device_node *node,
+ int *npins)
+{
+ int count;
+
+ /* Try the generic binding */
+ count = of_property_count_strings(node, "pins");
+ if (count > 0) {
+ *npins = count;
+ return "pins";
+ }
+
+ /* And fall back to our legacy one */
+ count = of_property_count_strings(node, "allwinner,pins");
+ if (count > 0) {
+ *npins = count;
+ return "allwinner,pins";
+ }
+
+ return NULL;
+}
+
+static unsigned long *sunxi_pctrl_build_pin_config(struct device_node *node,
+ unsigned int *len)
+{
+ unsigned long *pinconfig;
+ unsigned int configlen = 0, idx = 0;
+ int ret;
+
+ if (sunxi_pctrl_has_drive_prop(node))
+ configlen++;
+ if (sunxi_pctrl_has_bias_prop(node))
+ configlen++;
+
+ /*
+ * If we don't have any configuration, bail out
+ */
+ if (!configlen)
+ return NULL;
+
+ pinconfig = kcalloc(configlen, sizeof(*pinconfig), GFP_KERNEL);
+ if (!pinconfig)
+ return ERR_PTR(-ENOMEM);
+
+ if (sunxi_pctrl_has_drive_prop(node)) {
+ int drive = sunxi_pctrl_parse_drive_prop(node);
+ if (drive < 0) {
+ ret = drive;
+ goto err_free;
+ }
+
+ pinconfig[idx++] = pinconf_to_config_packed(PIN_CONFIG_DRIVE_STRENGTH,
+ drive);
+ }
+
+ if (sunxi_pctrl_has_bias_prop(node)) {
+ int pull = sunxi_pctrl_parse_bias_prop(node);
+ int arg = 0;
+ if (pull < 0) {
+ ret = pull;
+ goto err_free;
+ }
+
+ if (pull != PIN_CONFIG_BIAS_DISABLE)
+ arg = 1; /* hardware uses weak pull resistors */
+
+ pinconfig[idx++] = pinconf_to_config_packed(pull, arg);
+ }
+
+
+ *len = configlen;
+ return pinconfig;
+
+err_free:
+ kfree(pinconfig);
+ return ERR_PTR(ret);
+}
+
+static int sunxi_pctrl_dt_node_to_map(struct pinctrl_dev *pctldev,
+ struct device_node *node,
+ struct pinctrl_map **map,
+ unsigned *num_maps)
+{
+ struct sunxi_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
+ unsigned long *pinconfig;
+ struct property *prop;
+ const char *function, *pin_prop;
+ const char *group;
+ int ret, npins, nmaps, configlen = 0, i = 0;
+
+ *map = NULL;
+ *num_maps = 0;
+
+ function = sunxi_pctrl_parse_function_prop(node);
+ if (!function) {
+ dev_err(pctl->dev, "missing function property in node %pOFn\n",
+ node);
+ return -EINVAL;
+ }
+
+ pin_prop = sunxi_pctrl_find_pins_prop(node, &npins);
+ if (!pin_prop) {
+ dev_err(pctl->dev, "missing pins property in node %pOFn\n",
+ node);
+ return -EINVAL;
+ }
+
+ /*
+ * We have two maps for each pin: one for the function, one
+ * for the configuration (bias, strength, etc).
+ *
+ * We might be slightly overshooting, since we might not have
+ * any configuration.
+ */
+ nmaps = npins * 2;
+ *map = kmalloc_array(nmaps, sizeof(struct pinctrl_map), GFP_KERNEL);
+ if (!*map)
+ return -ENOMEM;
+
+ pinconfig = sunxi_pctrl_build_pin_config(node, &configlen);
+ if (IS_ERR(pinconfig)) {
+ ret = PTR_ERR(pinconfig);
+ goto err_free_map;
+ }
+
+ of_property_for_each_string(node, pin_prop, prop, group) {
+ struct sunxi_pinctrl_group *grp =
+ sunxi_pinctrl_find_group_by_name(pctl, group);
+
+ if (!grp) {
+ dev_err(pctl->dev, "unknown pin %s", group);
+ continue;
+ }
+
+ if (!sunxi_pinctrl_desc_find_function_by_name(pctl,
+ grp->name,
+ function)) {
+ dev_err(pctl->dev, "unsupported function %s on pin %s",
+ function, group);
+ continue;
+ }
+
+ (*map)[i].type = PIN_MAP_TYPE_MUX_GROUP;
+ (*map)[i].data.mux.group = group;
+ (*map)[i].data.mux.function = function;
+
+ i++;
+
+ if (pinconfig) {
+ (*map)[i].type = PIN_MAP_TYPE_CONFIGS_GROUP;
+ (*map)[i].data.configs.group_or_pin = group;
+ (*map)[i].data.configs.configs = pinconfig;
+ (*map)[i].data.configs.num_configs = configlen;
+ i++;
+ }
+ }
+
+ *num_maps = i;
+
+ /*
+ * We know have the number of maps we need, we can resize our
+ * map array
+ */
+ *map = krealloc(*map, i * sizeof(struct pinctrl_map), GFP_KERNEL);
+ if (!*map)
+ return -ENOMEM;
+
+ return 0;
+
+err_free_map:
+ kfree(*map);
+ *map = NULL;
+ return ret;
+}
+
+static void sunxi_pctrl_dt_free_map(struct pinctrl_dev *pctldev,
+ struct pinctrl_map *map,
+ unsigned num_maps)
+{
+ int i;
+
+ /* pin config is never in the first map */
+ for (i = 1; i < num_maps; i++) {
+ if (map[i].type != PIN_MAP_TYPE_CONFIGS_GROUP)
+ continue;
+
+ /*
+ * All the maps share the same pin config,
+ * free only the first one we find.
+ */
+ kfree(map[i].data.configs.configs);
+ break;
+ }
+
+ kfree(map);
+}
+
+static const struct pinctrl_ops sunxi_pctrl_ops = {
+ .dt_node_to_map = sunxi_pctrl_dt_node_to_map,
+ .dt_free_map = sunxi_pctrl_dt_free_map,
+ .get_groups_count = sunxi_pctrl_get_groups_count,
+ .get_group_name = sunxi_pctrl_get_group_name,
+ .get_group_pins = sunxi_pctrl_get_group_pins,
+};
+
+static int sunxi_pconf_reg(const struct sunxi_pinctrl *pctl,
+ u32 pin, enum pin_config_param param,
+ u32 *reg, u32 *shift, u32 *mask)
+{
+ switch (param) {
+ case PIN_CONFIG_DRIVE_STRENGTH:
+ sunxi_dlevel_reg(pctl, pin, reg, shift, mask);
+ break;
+
+ case PIN_CONFIG_BIAS_PULL_UP:
+ case PIN_CONFIG_BIAS_PULL_DOWN:
+ case PIN_CONFIG_BIAS_DISABLE:
+ sunxi_pull_reg(pctl, pin, reg, shift, mask);
+ break;
+
+ default:
+ return -ENOTSUPP;
+ }
+
+ return 0;
+}
+
+static int sunxi_pconf_get(struct pinctrl_dev *pctldev, unsigned pin,
+ unsigned long *config)
+{
+ struct sunxi_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
+ enum pin_config_param param = pinconf_to_config_param(*config);
+ u32 reg, shift, mask, val;
+ u16 arg;
+ int ret;
+
+ pin -= pctl->desc->pin_base;
+
+ ret = sunxi_pconf_reg(pctl, pin, param, &reg, &shift, &mask);
+ if (ret < 0)
+ return ret;
+
+ val = (readl(pctl->membase + reg) & mask) >> shift;
+
+ switch (pinconf_to_config_param(*config)) {
+ case PIN_CONFIG_DRIVE_STRENGTH:
+ arg = (val + 1) * 10;
+ break;
+
+ case PIN_CONFIG_BIAS_PULL_UP:
+ if (val != SUN4I_PINCTRL_PULL_UP)
+ return -EINVAL;
+ arg = 1; /* hardware is weak pull-up */
+ break;
+
+ case PIN_CONFIG_BIAS_PULL_DOWN:
+ if (val != SUN4I_PINCTRL_PULL_DOWN)
+ return -EINVAL;
+ arg = 1; /* hardware is weak pull-down */
+ break;
+
+ case PIN_CONFIG_BIAS_DISABLE:
+ if (val != SUN4I_PINCTRL_NO_PULL)
+ return -EINVAL;
+ arg = 0;
+ break;
+
+ default:
+ /* sunxi_pconf_reg should catch anything unsupported */
+ WARN_ON(1);
+ return -ENOTSUPP;
+ }
+
+ *config = pinconf_to_config_packed(param, arg);
+
+ return 0;
+}
+
+static int sunxi_pconf_group_get(struct pinctrl_dev *pctldev,
+ unsigned group,
+ unsigned long *config)
+{
+ struct sunxi_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
+ struct sunxi_pinctrl_group *g = &pctl->groups[group];
+
+ /* We only support 1 pin per group. Chain it to the pin callback */
+ return sunxi_pconf_get(pctldev, g->pin, config);
+}
+
+static int sunxi_pconf_set(struct pinctrl_dev *pctldev, unsigned pin,
+ unsigned long *configs, unsigned num_configs)
+{
+ struct sunxi_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
+ int i;
+
+ pin -= pctl->desc->pin_base;
+
+ for (i = 0; i < num_configs; i++) {
+ u32 arg, reg, shift, mask, val;
+ enum pin_config_param param;
+ unsigned long flags;
+ int ret;
+
+ param = pinconf_to_config_param(configs[i]);
+ arg = pinconf_to_config_argument(configs[i]);
+
+ ret = sunxi_pconf_reg(pctl, pin, param, &reg, &shift, &mask);
+ if (ret < 0)
+ return ret;
+
+ switch (param) {
+ case PIN_CONFIG_DRIVE_STRENGTH:
+ if (arg < 10 || arg > 40)
+ return -EINVAL;
+ /*
+ * We convert from mA to what the register expects:
+ * 0: 10mA
+ * 1: 20mA
+ * 2: 30mA
+ * 3: 40mA
+ */
+ val = arg / 10 - 1;
+ break;
+ case PIN_CONFIG_BIAS_DISABLE:
+ val = 0;
+ break;
+ case PIN_CONFIG_BIAS_PULL_UP:
+ if (arg == 0)
+ return -EINVAL;
+ val = 1;
+ break;
+ case PIN_CONFIG_BIAS_PULL_DOWN:
+ if (arg == 0)
+ return -EINVAL;
+ val = 2;
+ break;
+ default:
+ /* sunxi_pconf_reg should catch anything unsupported */
+ WARN_ON(1);
+ return -ENOTSUPP;
+ }
+
+ raw_spin_lock_irqsave(&pctl->lock, flags);
+ writel((readl(pctl->membase + reg) & ~mask) | val << shift,
+ pctl->membase + reg);
+ raw_spin_unlock_irqrestore(&pctl->lock, flags);
+ } /* for each config */
+
+ return 0;
+}
+
+static int sunxi_pconf_group_set(struct pinctrl_dev *pctldev, unsigned group,
+ unsigned long *configs, unsigned num_configs)
+{
+ struct sunxi_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
+ struct sunxi_pinctrl_group *g = &pctl->groups[group];
+
+ /* We only support 1 pin per group. Chain it to the pin callback */
+ return sunxi_pconf_set(pctldev, g->pin, configs, num_configs);
+}
+
+static const struct pinconf_ops sunxi_pconf_ops = {
+ .is_generic = true,
+ .pin_config_get = sunxi_pconf_get,
+ .pin_config_set = sunxi_pconf_set,
+ .pin_config_group_get = sunxi_pconf_group_get,
+ .pin_config_group_set = sunxi_pconf_group_set,
+};
+
+static int sunxi_pinctrl_set_io_bias_cfg(struct sunxi_pinctrl *pctl,
+ unsigned pin,
+ struct regulator *supply)
+{
+ unsigned short bank;
+ unsigned long flags;
+ u32 val, reg;
+ int uV;
+
+ if (!pctl->desc->io_bias_cfg_variant)
+ return 0;
+
+ uV = regulator_get_voltage(supply);
+ if (uV < 0)
+ return uV;
+
+ /* Might be dummy regulator with no voltage set */
+ if (uV == 0)
+ return 0;
+
+ pin -= pctl->desc->pin_base;
+ bank = pin / PINS_PER_BANK;
+
+ switch (pctl->desc->io_bias_cfg_variant) {
+ case BIAS_VOLTAGE_GRP_CONFIG:
+ /*
+ * Configured value must be equal or greater to actual
+ * voltage.
+ */
+ if (uV <= 1800000)
+ val = 0x0; /* 1.8V */
+ else if (uV <= 2500000)
+ val = 0x6; /* 2.5V */
+ else if (uV <= 2800000)
+ val = 0x9; /* 2.8V */
+ else if (uV <= 3000000)
+ val = 0xA; /* 3.0V */
+ else
+ val = 0xD; /* 3.3V */
+
+ reg = readl(pctl->membase + sunxi_grp_config_reg(pin));
+ reg &= ~IO_BIAS_MASK;
+ writel(reg | val, pctl->membase + sunxi_grp_config_reg(pin));
+ return 0;
+ case BIAS_VOLTAGE_PIO_POW_MODE_CTL:
+ val = uV > 1800000 && uV <= 2500000 ? BIT(bank) : 0;
+
+ raw_spin_lock_irqsave(&pctl->lock, flags);
+ reg = readl(pctl->membase + PIO_POW_MOD_CTL_REG);
+ reg &= ~BIT(bank);
+ writel(reg | val, pctl->membase + PIO_POW_MOD_CTL_REG);
+ raw_spin_unlock_irqrestore(&pctl->lock, flags);
+
+ fallthrough;
+ case BIAS_VOLTAGE_PIO_POW_MODE_SEL:
+ val = uV <= 1800000 ? 1 : 0;
+
+ raw_spin_lock_irqsave(&pctl->lock, flags);
+ reg = readl(pctl->membase + PIO_POW_MOD_SEL_REG);
+ reg &= ~(1 << bank);
+ writel(reg | val << bank, pctl->membase + PIO_POW_MOD_SEL_REG);
+ raw_spin_unlock_irqrestore(&pctl->lock, flags);
+ return 0;
+ default:
+ return -EINVAL;
+ }
+}
+
+static int sunxi_pmx_get_funcs_cnt(struct pinctrl_dev *pctldev)
+{
+ struct sunxi_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
+
+ return pctl->nfunctions;
+}
+
+static const char *sunxi_pmx_get_func_name(struct pinctrl_dev *pctldev,
+ unsigned function)
+{
+ struct sunxi_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
+
+ return pctl->functions[function].name;
+}
+
+static int sunxi_pmx_get_func_groups(struct pinctrl_dev *pctldev,
+ unsigned function,
+ const char * const **groups,
+ unsigned * const num_groups)
+{
+ struct sunxi_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
+
+ *groups = pctl->functions[function].groups;
+ *num_groups = pctl->functions[function].ngroups;
+
+ return 0;
+}
+
+static void sunxi_pmx_set(struct pinctrl_dev *pctldev,
+ unsigned pin,
+ u8 config)
+{
+ struct sunxi_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
+ u32 reg, shift, mask;
+ unsigned long flags;
+
+ pin -= pctl->desc->pin_base;
+ sunxi_mux_reg(pctl, pin, &reg, &shift, &mask);
+
+ raw_spin_lock_irqsave(&pctl->lock, flags);
+
+ writel((readl(pctl->membase + reg) & ~mask) | config << shift,
+ pctl->membase + reg);
+
+ raw_spin_unlock_irqrestore(&pctl->lock, flags);
+}
+
+static int sunxi_pmx_set_mux(struct pinctrl_dev *pctldev,
+ unsigned function,
+ unsigned group)
+{
+ struct sunxi_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
+ struct sunxi_pinctrl_group *g = pctl->groups + group;
+ struct sunxi_pinctrl_function *func = pctl->functions + function;
+ struct sunxi_desc_function *desc =
+ sunxi_pinctrl_desc_find_function_by_name(pctl,
+ g->name,
+ func->name);
+
+ if (!desc)
+ return -EINVAL;
+
+ sunxi_pmx_set(pctldev, g->pin, desc->muxval);
+
+ return 0;
+}
+
+static int
+sunxi_pmx_gpio_set_direction(struct pinctrl_dev *pctldev,
+ struct pinctrl_gpio_range *range,
+ unsigned offset,
+ bool input)
+{
+ struct sunxi_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
+ struct sunxi_desc_function *desc;
+ const char *func;
+
+ if (input)
+ func = "gpio_in";
+ else
+ func = "gpio_out";
+
+ desc = sunxi_pinctrl_desc_find_function_by_pin(pctl, offset, func);
+ if (!desc)
+ return -EINVAL;
+
+ sunxi_pmx_set(pctldev, offset, desc->muxval);
+
+ return 0;
+}
+
+static int sunxi_pmx_request(struct pinctrl_dev *pctldev, unsigned offset)
+{
+ struct sunxi_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
+ unsigned short bank = offset / PINS_PER_BANK;
+ unsigned short bank_offset = bank - pctl->desc->pin_base /
+ PINS_PER_BANK;
+ struct sunxi_pinctrl_regulator *s_reg = &pctl->regulators[bank_offset];
+ struct regulator *reg = s_reg->regulator;
+ char supply[16];
+ int ret;
+
+ if (reg) {
+ refcount_inc(&s_reg->refcount);
+ return 0;
+ }
+
+ snprintf(supply, sizeof(supply), "vcc-p%c", 'a' + bank);
+ reg = regulator_get(pctl->dev, supply);
+ if (IS_ERR(reg))
+ return dev_err_probe(pctl->dev, PTR_ERR(reg),
+ "Couldn't get bank P%c regulator\n",
+ 'A' + bank);
+
+ ret = regulator_enable(reg);
+ if (ret) {
+ dev_err(pctl->dev,
+ "Couldn't enable bank P%c regulator\n", 'A' + bank);
+ goto out;
+ }
+
+ sunxi_pinctrl_set_io_bias_cfg(pctl, offset, reg);
+
+ s_reg->regulator = reg;
+ refcount_set(&s_reg->refcount, 1);
+
+ return 0;
+
+out:
+ regulator_put(s_reg->regulator);
+
+ return ret;
+}
+
+static int sunxi_pmx_free(struct pinctrl_dev *pctldev, unsigned offset)
+{
+ struct sunxi_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
+ unsigned short bank = offset / PINS_PER_BANK;
+ unsigned short bank_offset = bank - pctl->desc->pin_base /
+ PINS_PER_BANK;
+ struct sunxi_pinctrl_regulator *s_reg = &pctl->regulators[bank_offset];
+
+ if (!refcount_dec_and_test(&s_reg->refcount))
+ return 0;
+
+ regulator_disable(s_reg->regulator);
+ regulator_put(s_reg->regulator);
+ s_reg->regulator = NULL;
+
+ return 0;
+}
+
+static const struct pinmux_ops sunxi_pmx_ops = {
+ .get_functions_count = sunxi_pmx_get_funcs_cnt,
+ .get_function_name = sunxi_pmx_get_func_name,
+ .get_function_groups = sunxi_pmx_get_func_groups,
+ .set_mux = sunxi_pmx_set_mux,
+ .gpio_set_direction = sunxi_pmx_gpio_set_direction,
+ .request = sunxi_pmx_request,
+ .free = sunxi_pmx_free,
+ .strict = true,
+};
+
+static int sunxi_pinctrl_gpio_direction_input(struct gpio_chip *chip,
+ unsigned offset)
+{
+ struct sunxi_pinctrl *pctl = gpiochip_get_data(chip);
+
+ return sunxi_pmx_gpio_set_direction(pctl->pctl_dev, NULL,
+ chip->base + offset, true);
+}
+
+static int sunxi_pinctrl_gpio_get(struct gpio_chip *chip, unsigned offset)
+{
+ struct sunxi_pinctrl *pctl = gpiochip_get_data(chip);
+ bool set_mux = pctl->desc->irq_read_needs_mux &&
+ gpiochip_line_is_irq(chip, offset);
+ u32 pin = offset + chip->base;
+ u32 reg, shift, mask, val;
+
+ sunxi_data_reg(pctl, offset, &reg, &shift, &mask);
+
+ if (set_mux)
+ sunxi_pmx_set(pctl->pctl_dev, pin, SUN4I_FUNC_INPUT);
+
+ val = (readl(pctl->membase + reg) & mask) >> shift;
+
+ if (set_mux)
+ sunxi_pmx_set(pctl->pctl_dev, pin, SUN4I_FUNC_IRQ);
+
+ return val;
+}
+
+static void sunxi_pinctrl_gpio_set(struct gpio_chip *chip,
+ unsigned offset, int value)
+{
+ struct sunxi_pinctrl *pctl = gpiochip_get_data(chip);
+ u32 reg, shift, mask, val;
+ unsigned long flags;
+
+ sunxi_data_reg(pctl, offset, &reg, &shift, &mask);
+
+ raw_spin_lock_irqsave(&pctl->lock, flags);
+
+ val = readl(pctl->membase + reg);
+
+ if (value)
+ val |= mask;
+ else
+ val &= ~mask;
+
+ writel(val, pctl->membase + reg);
+
+ raw_spin_unlock_irqrestore(&pctl->lock, flags);
+}
+
+static int sunxi_pinctrl_gpio_direction_output(struct gpio_chip *chip,
+ unsigned offset, int value)
+{
+ struct sunxi_pinctrl *pctl = gpiochip_get_data(chip);
+
+ sunxi_pinctrl_gpio_set(chip, offset, value);
+ return sunxi_pmx_gpio_set_direction(pctl->pctl_dev, NULL,
+ chip->base + offset, false);
+}
+
+static int sunxi_pinctrl_gpio_of_xlate(struct gpio_chip *gc,
+ const struct of_phandle_args *gpiospec,
+ u32 *flags)
+{
+ int pin, base;
+
+ base = PINS_PER_BANK * gpiospec->args[0];
+ pin = base + gpiospec->args[1];
+
+ if (pin > gc->ngpio)
+ return -EINVAL;
+
+ if (flags)
+ *flags = gpiospec->args[2];
+
+ return pin;
+}
+
+static int sunxi_pinctrl_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
+{
+ struct sunxi_pinctrl *pctl = gpiochip_get_data(chip);
+ struct sunxi_desc_function *desc;
+ unsigned pinnum = pctl->desc->pin_base + offset;
+ unsigned irqnum;
+
+ if (offset >= chip->ngpio)
+ return -ENXIO;
+
+ desc = sunxi_pinctrl_desc_find_function_by_pin(pctl, pinnum, "irq");
+ if (!desc)
+ return -EINVAL;
+
+ irqnum = desc->irqbank * IRQ_PER_BANK + desc->irqnum;
+
+ dev_dbg(chip->parent, "%s: request IRQ for GPIO %d, return %d\n",
+ chip->label, offset + chip->base, irqnum);
+
+ return irq_find_mapping(pctl->domain, irqnum);
+}
+
+static int sunxi_pinctrl_irq_request_resources(struct irq_data *d)
+{
+ struct sunxi_pinctrl *pctl = irq_data_get_irq_chip_data(d);
+ struct sunxi_desc_function *func;
+ int ret;
+
+ func = sunxi_pinctrl_desc_find_function_by_pin(pctl,
+ pctl->irq_array[d->hwirq], "irq");
+ if (!func)
+ return -EINVAL;
+
+ ret = gpiochip_lock_as_irq(pctl->chip,
+ pctl->irq_array[d->hwirq] - pctl->desc->pin_base);
+ if (ret) {
+ dev_err(pctl->dev, "unable to lock HW IRQ %lu for IRQ\n",
+ irqd_to_hwirq(d));
+ return ret;
+ }
+
+ /* Change muxing to INT mode */
+ sunxi_pmx_set(pctl->pctl_dev, pctl->irq_array[d->hwirq], func->muxval);
+
+ return 0;
+}
+
+static void sunxi_pinctrl_irq_release_resources(struct irq_data *d)
+{
+ struct sunxi_pinctrl *pctl = irq_data_get_irq_chip_data(d);
+
+ gpiochip_unlock_as_irq(pctl->chip,
+ pctl->irq_array[d->hwirq] - pctl->desc->pin_base);
+}
+
+static int sunxi_pinctrl_irq_set_type(struct irq_data *d, unsigned int type)
+{
+ struct sunxi_pinctrl *pctl = irq_data_get_irq_chip_data(d);
+ u32 reg = sunxi_irq_cfg_reg(pctl->desc, d->hwirq);
+ u8 index = sunxi_irq_cfg_offset(d->hwirq);
+ unsigned long flags;
+ u32 regval;
+ u8 mode;
+
+ switch (type) {
+ case IRQ_TYPE_EDGE_RISING:
+ mode = IRQ_EDGE_RISING;
+ break;
+ case IRQ_TYPE_EDGE_FALLING:
+ mode = IRQ_EDGE_FALLING;
+ break;
+ case IRQ_TYPE_EDGE_BOTH:
+ mode = IRQ_EDGE_BOTH;
+ break;
+ case IRQ_TYPE_LEVEL_HIGH:
+ mode = IRQ_LEVEL_HIGH;
+ break;
+ case IRQ_TYPE_LEVEL_LOW:
+ mode = IRQ_LEVEL_LOW;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ raw_spin_lock_irqsave(&pctl->lock, flags);
+
+ if (type & IRQ_TYPE_LEVEL_MASK)
+ irq_set_chip_handler_name_locked(d, &sunxi_pinctrl_level_irq_chip,
+ handle_fasteoi_irq, NULL);
+ else
+ irq_set_chip_handler_name_locked(d, &sunxi_pinctrl_edge_irq_chip,
+ handle_edge_irq, NULL);
+
+ regval = readl(pctl->membase + reg);
+ regval &= ~(IRQ_CFG_IRQ_MASK << index);
+ writel(regval | (mode << index), pctl->membase + reg);
+
+ raw_spin_unlock_irqrestore(&pctl->lock, flags);
+
+ return 0;
+}
+
+static void sunxi_pinctrl_irq_ack(struct irq_data *d)
+{
+ struct sunxi_pinctrl *pctl = irq_data_get_irq_chip_data(d);
+ u32 status_reg = sunxi_irq_status_reg(pctl->desc, d->hwirq);
+ u8 status_idx = sunxi_irq_status_offset(d->hwirq);
+
+ /* Clear the IRQ */
+ writel(1 << status_idx, pctl->membase + status_reg);
+}
+
+static void sunxi_pinctrl_irq_mask(struct irq_data *d)
+{
+ struct sunxi_pinctrl *pctl = irq_data_get_irq_chip_data(d);
+ u32 reg = sunxi_irq_ctrl_reg(pctl->desc, d->hwirq);
+ u8 idx = sunxi_irq_ctrl_offset(d->hwirq);
+ unsigned long flags;
+ u32 val;
+
+ raw_spin_lock_irqsave(&pctl->lock, flags);
+
+ /* Mask the IRQ */
+ val = readl(pctl->membase + reg);
+ writel(val & ~(1 << idx), pctl->membase + reg);
+
+ raw_spin_unlock_irqrestore(&pctl->lock, flags);
+}
+
+static void sunxi_pinctrl_irq_unmask(struct irq_data *d)
+{
+ struct sunxi_pinctrl *pctl = irq_data_get_irq_chip_data(d);
+ u32 reg = sunxi_irq_ctrl_reg(pctl->desc, d->hwirq);
+ u8 idx = sunxi_irq_ctrl_offset(d->hwirq);
+ unsigned long flags;
+ u32 val;
+
+ raw_spin_lock_irqsave(&pctl->lock, flags);
+
+ /* Unmask the IRQ */
+ val = readl(pctl->membase + reg);
+ writel(val | (1 << idx), pctl->membase + reg);
+
+ raw_spin_unlock_irqrestore(&pctl->lock, flags);
+}
+
+static void sunxi_pinctrl_irq_ack_unmask(struct irq_data *d)
+{
+ sunxi_pinctrl_irq_ack(d);
+ sunxi_pinctrl_irq_unmask(d);
+}
+
+static int sunxi_pinctrl_irq_set_wake(struct irq_data *d, unsigned int on)
+{
+ struct sunxi_pinctrl *pctl = irq_data_get_irq_chip_data(d);
+ u8 bank = d->hwirq / IRQ_PER_BANK;
+
+ return irq_set_irq_wake(pctl->irq[bank], on);
+}
+
+static struct irq_chip sunxi_pinctrl_edge_irq_chip = {
+ .name = "sunxi_pio_edge",
+ .irq_ack = sunxi_pinctrl_irq_ack,
+ .irq_mask = sunxi_pinctrl_irq_mask,
+ .irq_unmask = sunxi_pinctrl_irq_unmask,
+ .irq_request_resources = sunxi_pinctrl_irq_request_resources,
+ .irq_release_resources = sunxi_pinctrl_irq_release_resources,
+ .irq_set_type = sunxi_pinctrl_irq_set_type,
+ .irq_set_wake = sunxi_pinctrl_irq_set_wake,
+ .flags = IRQCHIP_MASK_ON_SUSPEND,
+};
+
+static struct irq_chip sunxi_pinctrl_level_irq_chip = {
+ .name = "sunxi_pio_level",
+ .irq_eoi = sunxi_pinctrl_irq_ack,
+ .irq_mask = sunxi_pinctrl_irq_mask,
+ .irq_unmask = sunxi_pinctrl_irq_unmask,
+ /* Define irq_enable / disable to avoid spurious irqs for drivers
+ * using these to suppress irqs while they clear the irq source */
+ .irq_enable = sunxi_pinctrl_irq_ack_unmask,
+ .irq_disable = sunxi_pinctrl_irq_mask,
+ .irq_request_resources = sunxi_pinctrl_irq_request_resources,
+ .irq_release_resources = sunxi_pinctrl_irq_release_resources,
+ .irq_set_type = sunxi_pinctrl_irq_set_type,
+ .irq_set_wake = sunxi_pinctrl_irq_set_wake,
+ .flags = IRQCHIP_EOI_THREADED |
+ IRQCHIP_MASK_ON_SUSPEND |
+ IRQCHIP_EOI_IF_HANDLED,
+};
+
+static int sunxi_pinctrl_irq_of_xlate(struct irq_domain *d,
+ struct device_node *node,
+ const u32 *intspec,
+ unsigned int intsize,
+ unsigned long *out_hwirq,
+ unsigned int *out_type)
+{
+ struct sunxi_pinctrl *pctl = d->host_data;
+ struct sunxi_desc_function *desc;
+ int pin, base;
+
+ if (intsize < 3)
+ return -EINVAL;
+
+ base = PINS_PER_BANK * intspec[0];
+ pin = pctl->desc->pin_base + base + intspec[1];
+
+ desc = sunxi_pinctrl_desc_find_function_by_pin(pctl, pin, "irq");
+ if (!desc)
+ return -EINVAL;
+
+ *out_hwirq = desc->irqbank * PINS_PER_BANK + desc->irqnum;
+ *out_type = intspec[2];
+
+ return 0;
+}
+
+static const struct irq_domain_ops sunxi_pinctrl_irq_domain_ops = {
+ .xlate = sunxi_pinctrl_irq_of_xlate,
+};
+
+static void sunxi_pinctrl_irq_handler(struct irq_desc *desc)
+{
+ unsigned int irq = irq_desc_get_irq(desc);
+ struct irq_chip *chip = irq_desc_get_chip(desc);
+ struct sunxi_pinctrl *pctl = irq_desc_get_handler_data(desc);
+ unsigned long bank, reg, val;
+
+ for (bank = 0; bank < pctl->desc->irq_banks; bank++)
+ if (irq == pctl->irq[bank])
+ break;
+
+ WARN_ON(bank == pctl->desc->irq_banks);
+
+ chained_irq_enter(chip, desc);
+
+ reg = sunxi_irq_status_reg_from_bank(pctl->desc, bank);
+ val = readl(pctl->membase + reg);
+
+ if (val) {
+ int irqoffset;
+
+ for_each_set_bit(irqoffset, &val, IRQ_PER_BANK)
+ generic_handle_domain_irq(pctl->domain,
+ bank * IRQ_PER_BANK + irqoffset);
+ }
+
+ chained_irq_exit(chip, desc);
+}
+
+static int sunxi_pinctrl_add_function(struct sunxi_pinctrl *pctl,
+ const char *name)
+{
+ struct sunxi_pinctrl_function *func = pctl->functions;
+
+ while (func->name) {
+ /* function already there */
+ if (strcmp(func->name, name) == 0) {
+ func->ngroups++;
+ return -EEXIST;
+ }
+ func++;
+ }
+
+ func->name = name;
+ func->ngroups = 1;
+
+ pctl->nfunctions++;
+
+ return 0;
+}
+
+static int sunxi_pinctrl_build_state(struct platform_device *pdev)
+{
+ struct sunxi_pinctrl *pctl = platform_get_drvdata(pdev);
+ void *ptr;
+ int i;
+
+ /*
+ * Allocate groups
+ *
+ * We assume that the number of groups is the number of pins
+ * given in the data array.
+
+ * This will not always be true, since some pins might not be
+ * available in the current variant, but fortunately for us,
+ * this means that the number of pins is the maximum group
+ * number we will ever see.
+ */
+ pctl->groups = devm_kcalloc(&pdev->dev,
+ pctl->desc->npins, sizeof(*pctl->groups),
+ GFP_KERNEL);
+ if (!pctl->groups)
+ return -ENOMEM;
+
+ for (i = 0; i < pctl->desc->npins; i++) {
+ const struct sunxi_desc_pin *pin = pctl->desc->pins + i;
+ struct sunxi_pinctrl_group *group = pctl->groups + pctl->ngroups;
+
+ if (pin->variant && !(pctl->variant & pin->variant))
+ continue;
+
+ group->name = pin->pin.name;
+ group->pin = pin->pin.number;
+
+ /* And now we count the actual number of pins / groups */
+ pctl->ngroups++;
+ }
+
+ /*
+ * Find an upper bound for the maximum number of functions: in
+ * the worst case we have gpio_in, gpio_out, irq and up to seven
+ * special functions per pin, plus one entry for the sentinel.
+ * We'll reallocate that later anyway.
+ */
+ pctl->functions = kcalloc(7 * pctl->ngroups + 4,
+ sizeof(*pctl->functions),
+ GFP_KERNEL);
+ if (!pctl->functions)
+ return -ENOMEM;
+
+ /* Count functions and their associated groups */
+ for (i = 0; i < pctl->desc->npins; i++) {
+ const struct sunxi_desc_pin *pin = pctl->desc->pins + i;
+ struct sunxi_desc_function *func;
+
+ if (pin->variant && !(pctl->variant & pin->variant))
+ continue;
+
+ for (func = pin->functions; func->name; func++) {
+ if (func->variant && !(pctl->variant & func->variant))
+ continue;
+
+ /* Create interrupt mapping while we're at it */
+ if (!strcmp(func->name, "irq")) {
+ int irqnum = func->irqnum + func->irqbank * IRQ_PER_BANK;
+ pctl->irq_array[irqnum] = pin->pin.number;
+ }
+
+ sunxi_pinctrl_add_function(pctl, func->name);
+ }
+ }
+
+ /* And now allocated and fill the array for real */
+ ptr = krealloc(pctl->functions,
+ pctl->nfunctions * sizeof(*pctl->functions),
+ GFP_KERNEL);
+ if (!ptr) {
+ kfree(pctl->functions);
+ pctl->functions = NULL;
+ return -ENOMEM;
+ }
+ pctl->functions = ptr;
+
+ for (i = 0; i < pctl->desc->npins; i++) {
+ const struct sunxi_desc_pin *pin = pctl->desc->pins + i;
+ struct sunxi_desc_function *func;
+
+ if (pin->variant && !(pctl->variant & pin->variant))
+ continue;
+
+ for (func = pin->functions; func->name; func++) {
+ struct sunxi_pinctrl_function *func_item;
+ const char **func_grp;
+
+ if (func->variant && !(pctl->variant & func->variant))
+ continue;
+
+ func_item = sunxi_pinctrl_find_function_by_name(pctl,
+ func->name);
+ if (!func_item) {
+ kfree(pctl->functions);
+ return -EINVAL;
+ }
+
+ if (!func_item->groups) {
+ func_item->groups =
+ devm_kcalloc(&pdev->dev,
+ func_item->ngroups,
+ sizeof(*func_item->groups),
+ GFP_KERNEL);
+ if (!func_item->groups) {
+ kfree(pctl->functions);
+ return -ENOMEM;
+ }
+ }
+
+ func_grp = func_item->groups;
+ while (*func_grp)
+ func_grp++;
+
+ *func_grp = pin->pin.name;
+ }
+ }
+
+ return 0;
+}
+
+static int sunxi_pinctrl_get_debounce_div(struct clk *clk, int freq, int *diff)
+{
+ unsigned long clock = clk_get_rate(clk);
+ unsigned int best_diff, best_div;
+ int i;
+
+ best_diff = abs(freq - clock);
+ best_div = 0;
+
+ for (i = 1; i < 8; i++) {
+ int cur_diff = abs(freq - (clock >> i));
+
+ if (cur_diff < best_diff) {
+ best_diff = cur_diff;
+ best_div = i;
+ }
+ }
+
+ *diff = best_diff;
+ return best_div;
+}
+
+static int sunxi_pinctrl_setup_debounce(struct sunxi_pinctrl *pctl,
+ struct device_node *node)
+{
+ unsigned int hosc_diff, losc_diff;
+ unsigned int hosc_div, losc_div;
+ struct clk *hosc, *losc;
+ u8 div, src;
+ int i, ret;
+
+ /* Deal with old DTs that didn't have the oscillators */
+ if (of_clk_get_parent_count(node) != 3)
+ return 0;
+
+ /* If we don't have any setup, bail out */
+ if (!of_find_property(node, "input-debounce", NULL))
+ return 0;
+
+ losc = devm_clk_get(pctl->dev, "losc");
+ if (IS_ERR(losc))
+ return PTR_ERR(losc);
+
+ hosc = devm_clk_get(pctl->dev, "hosc");
+ if (IS_ERR(hosc))
+ return PTR_ERR(hosc);
+
+ for (i = 0; i < pctl->desc->irq_banks; i++) {
+ unsigned long debounce_freq;
+ u32 debounce;
+
+ ret = of_property_read_u32_index(node, "input-debounce",
+ i, &debounce);
+ if (ret)
+ return ret;
+
+ if (!debounce)
+ continue;
+
+ debounce_freq = DIV_ROUND_CLOSEST(USEC_PER_SEC, debounce);
+ losc_div = sunxi_pinctrl_get_debounce_div(losc,
+ debounce_freq,
+ &losc_diff);
+
+ hosc_div = sunxi_pinctrl_get_debounce_div(hosc,
+ debounce_freq,
+ &hosc_diff);
+
+ if (hosc_diff < losc_diff) {
+ div = hosc_div;
+ src = 1;
+ } else {
+ div = losc_div;
+ src = 0;
+ }
+
+ writel(src | div << 4,
+ pctl->membase +
+ sunxi_irq_debounce_reg_from_bank(pctl->desc, i));
+ }
+
+ return 0;
+}
+
+int sunxi_pinctrl_init_with_variant(struct platform_device *pdev,
+ const struct sunxi_pinctrl_desc *desc,
+ unsigned long variant)
+{
+ struct device_node *node = pdev->dev.of_node;
+ struct pinctrl_desc *pctrl_desc;
+ struct pinctrl_pin_desc *pins;
+ struct sunxi_pinctrl *pctl;
+ struct pinmux_ops *pmxops;
+ int i, ret, last_pin, pin_idx;
+ struct clk *clk;
+
+ pctl = devm_kzalloc(&pdev->dev, sizeof(*pctl), GFP_KERNEL);
+ if (!pctl)
+ return -ENOMEM;
+ platform_set_drvdata(pdev, pctl);
+
+ raw_spin_lock_init(&pctl->lock);
+
+ pctl->membase = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(pctl->membase))
+ return PTR_ERR(pctl->membase);
+
+ pctl->dev = &pdev->dev;
+ pctl->desc = desc;
+ pctl->variant = variant;
+ if (pctl->variant >= PINCTRL_SUN20I_D1) {
+ pctl->bank_mem_size = D1_BANK_MEM_SIZE;
+ pctl->pull_regs_offset = D1_PULL_REGS_OFFSET;
+ pctl->dlevel_field_width = D1_DLEVEL_FIELD_WIDTH;
+ } else {
+ pctl->bank_mem_size = BANK_MEM_SIZE;
+ pctl->pull_regs_offset = PULL_REGS_OFFSET;
+ pctl->dlevel_field_width = DLEVEL_FIELD_WIDTH;
+ }
+
+ pctl->irq_array = devm_kcalloc(&pdev->dev,
+ IRQ_PER_BANK * pctl->desc->irq_banks,
+ sizeof(*pctl->irq_array),
+ GFP_KERNEL);
+ if (!pctl->irq_array)
+ return -ENOMEM;
+
+ ret = sunxi_pinctrl_build_state(pdev);
+ if (ret) {
+ dev_err(&pdev->dev, "dt probe failed: %d\n", ret);
+ return ret;
+ }
+
+ pins = devm_kcalloc(&pdev->dev,
+ pctl->desc->npins, sizeof(*pins),
+ GFP_KERNEL);
+ if (!pins)
+ return -ENOMEM;
+
+ for (i = 0, pin_idx = 0; i < pctl->desc->npins; i++) {
+ const struct sunxi_desc_pin *pin = pctl->desc->pins + i;
+
+ if (pin->variant && !(pctl->variant & pin->variant))
+ continue;
+
+ pins[pin_idx++] = pin->pin;
+ }
+
+ pctrl_desc = devm_kzalloc(&pdev->dev,
+ sizeof(*pctrl_desc),
+ GFP_KERNEL);
+ if (!pctrl_desc)
+ return -ENOMEM;
+
+ pctrl_desc->name = dev_name(&pdev->dev);
+ pctrl_desc->owner = THIS_MODULE;
+ pctrl_desc->pins = pins;
+ pctrl_desc->npins = pctl->ngroups;
+ pctrl_desc->confops = &sunxi_pconf_ops;
+ pctrl_desc->pctlops = &sunxi_pctrl_ops;
+
+ pmxops = devm_kmemdup(&pdev->dev, &sunxi_pmx_ops, sizeof(sunxi_pmx_ops),
+ GFP_KERNEL);
+ if (!pmxops)
+ return -ENOMEM;
+
+ if (desc->disable_strict_mode)
+ pmxops->strict = false;
+
+ pctrl_desc->pmxops = pmxops;
+
+ pctl->pctl_dev = devm_pinctrl_register(&pdev->dev, pctrl_desc, pctl);
+ if (IS_ERR(pctl->pctl_dev)) {
+ dev_err(&pdev->dev, "couldn't register pinctrl driver\n");
+ return PTR_ERR(pctl->pctl_dev);
+ }
+
+ pctl->chip = devm_kzalloc(&pdev->dev, sizeof(*pctl->chip), GFP_KERNEL);
+ if (!pctl->chip)
+ return -ENOMEM;
+
+ last_pin = pctl->desc->pins[pctl->desc->npins - 1].pin.number;
+ pctl->chip->owner = THIS_MODULE;
+ pctl->chip->request = gpiochip_generic_request;
+ pctl->chip->free = gpiochip_generic_free;
+ pctl->chip->set_config = gpiochip_generic_config;
+ pctl->chip->direction_input = sunxi_pinctrl_gpio_direction_input;
+ pctl->chip->direction_output = sunxi_pinctrl_gpio_direction_output;
+ pctl->chip->get = sunxi_pinctrl_gpio_get;
+ pctl->chip->set = sunxi_pinctrl_gpio_set;
+ pctl->chip->of_xlate = sunxi_pinctrl_gpio_of_xlate;
+ pctl->chip->to_irq = sunxi_pinctrl_gpio_to_irq;
+ pctl->chip->of_gpio_n_cells = 3;
+ pctl->chip->can_sleep = false;
+ pctl->chip->ngpio = round_up(last_pin, PINS_PER_BANK) -
+ pctl->desc->pin_base;
+ pctl->chip->label = dev_name(&pdev->dev);
+ pctl->chip->parent = &pdev->dev;
+ pctl->chip->base = pctl->desc->pin_base;
+
+ ret = gpiochip_add_data(pctl->chip, pctl);
+ if (ret)
+ return ret;
+
+ for (i = 0; i < pctl->desc->npins; i++) {
+ const struct sunxi_desc_pin *pin = pctl->desc->pins + i;
+
+ ret = gpiochip_add_pin_range(pctl->chip, dev_name(&pdev->dev),
+ pin->pin.number - pctl->desc->pin_base,
+ pin->pin.number, 1);
+ if (ret)
+ goto gpiochip_error;
+ }
+
+ ret = of_clk_get_parent_count(node);
+ clk = devm_clk_get(&pdev->dev, ret == 1 ? NULL : "apb");
+ if (IS_ERR(clk)) {
+ ret = PTR_ERR(clk);
+ goto gpiochip_error;
+ }
+
+ ret = clk_prepare_enable(clk);
+ if (ret)
+ goto gpiochip_error;
+
+ pctl->irq = devm_kcalloc(&pdev->dev,
+ pctl->desc->irq_banks,
+ sizeof(*pctl->irq),
+ GFP_KERNEL);
+ if (!pctl->irq) {
+ ret = -ENOMEM;
+ goto clk_error;
+ }
+
+ for (i = 0; i < pctl->desc->irq_banks; i++) {
+ pctl->irq[i] = platform_get_irq(pdev, i);
+ if (pctl->irq[i] < 0) {
+ ret = pctl->irq[i];
+ goto clk_error;
+ }
+ }
+
+ pctl->domain = irq_domain_add_linear(node,
+ pctl->desc->irq_banks * IRQ_PER_BANK,
+ &sunxi_pinctrl_irq_domain_ops,
+ pctl);
+ if (!pctl->domain) {
+ dev_err(&pdev->dev, "Couldn't register IRQ domain\n");
+ ret = -ENOMEM;
+ goto clk_error;
+ }
+
+ for (i = 0; i < (pctl->desc->irq_banks * IRQ_PER_BANK); i++) {
+ int irqno = irq_create_mapping(pctl->domain, i);
+
+ irq_set_lockdep_class(irqno, &sunxi_pinctrl_irq_lock_class,
+ &sunxi_pinctrl_irq_request_class);
+ irq_set_chip_and_handler(irqno, &sunxi_pinctrl_edge_irq_chip,
+ handle_edge_irq);
+ irq_set_chip_data(irqno, pctl);
+ }
+
+ for (i = 0; i < pctl->desc->irq_banks; i++) {
+ /* Mask and clear all IRQs before registering a handler */
+ writel(0, pctl->membase +
+ sunxi_irq_ctrl_reg_from_bank(pctl->desc, i));
+ writel(0xffffffff,
+ pctl->membase +
+ sunxi_irq_status_reg_from_bank(pctl->desc, i));
+
+ irq_set_chained_handler_and_data(pctl->irq[i],
+ sunxi_pinctrl_irq_handler,
+ pctl);
+ }
+
+ sunxi_pinctrl_setup_debounce(pctl, node);
+
+ dev_info(&pdev->dev, "initialized sunXi PIO driver\n");
+
+ return 0;
+
+clk_error:
+ clk_disable_unprepare(clk);
+gpiochip_error:
+ gpiochip_remove(pctl->chip);
+ return ret;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-01 21:50:59 +0000