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path: root/drivers/pinctrl/qcom/pinctrl-ssbi-gpio.c
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Diffstat (limited to 'drivers/pinctrl/qcom/pinctrl-ssbi-gpio.c')
-rw-r--r--drivers/pinctrl/qcom/pinctrl-ssbi-gpio.c859
1 files changed, 859 insertions, 0 deletions
diff --git a/drivers/pinctrl/qcom/pinctrl-ssbi-gpio.c b/drivers/pinctrl/qcom/pinctrl-ssbi-gpio.c
new file mode 100644
index 000000000..1b41adda8
--- /dev/null
+++ b/drivers/pinctrl/qcom/pinctrl-ssbi-gpio.c
@@ -0,0 +1,859 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2015, Sony Mobile Communications AB.
+ * Copyright (c) 2013, The Linux Foundation. All rights reserved.
+ */
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/pinctrl/pinctrl.h>
+#include <linux/pinctrl/pinmux.h>
+#include <linux/pinctrl/pinconf.h>
+#include <linux/pinctrl/pinconf-generic.h>
+#include <linux/slab.h>
+#include <linux/regmap.h>
+#include <linux/gpio/driver.h>
+#include <linux/interrupt.h>
+#include <linux/of_device.h>
+#include <linux/of_irq.h>
+
+#include <dt-bindings/pinctrl/qcom,pmic-gpio.h>
+
+#include "../core.h"
+#include "../pinctrl-utils.h"
+
+/* mode */
+#define PM8XXX_GPIO_MODE_ENABLED BIT(0)
+#define PM8XXX_GPIO_MODE_INPUT 0
+#define PM8XXX_GPIO_MODE_OUTPUT 2
+
+/* output buffer */
+#define PM8XXX_GPIO_PUSH_PULL 0
+#define PM8XXX_GPIO_OPEN_DRAIN 1
+
+/* bias */
+#define PM8XXX_GPIO_BIAS_PU_30 0
+#define PM8XXX_GPIO_BIAS_PU_1P5 1
+#define PM8XXX_GPIO_BIAS_PU_31P5 2
+#define PM8XXX_GPIO_BIAS_PU_1P5_30 3
+#define PM8XXX_GPIO_BIAS_PD 4
+#define PM8XXX_GPIO_BIAS_NP 5
+
+/* GPIO registers */
+#define SSBI_REG_ADDR_GPIO_BASE 0x150
+#define SSBI_REG_ADDR_GPIO(n) (SSBI_REG_ADDR_GPIO_BASE + n)
+
+#define PM8XXX_BANK_WRITE BIT(7)
+
+#define PM8XXX_MAX_GPIOS 44
+
+#define PM8XXX_GPIO_PHYSICAL_OFFSET 1
+
+/* custom pinconf parameters */
+#define PM8XXX_QCOM_DRIVE_STRENGH (PIN_CONFIG_END + 1)
+#define PM8XXX_QCOM_PULL_UP_STRENGTH (PIN_CONFIG_END + 2)
+
+/**
+ * struct pm8xxx_pin_data - dynamic configuration for a pin
+ * @reg: address of the control register
+ * @power_source: logical selected voltage source, mapping in static data
+ * is used translate to register values
+ * @mode: operating mode for the pin (input/output)
+ * @open_drain: output buffer configured as open-drain (vs push-pull)
+ * @output_value: configured output value
+ * @bias: register view of configured bias
+ * @pull_up_strength: placeholder for selected pull up strength
+ * only used to configure bias when pull up is selected
+ * @output_strength: selector of output-strength
+ * @disable: pin disabled / configured as tristate
+ * @function: pinmux selector
+ * @inverted: pin logic is inverted
+ */
+struct pm8xxx_pin_data {
+ unsigned reg;
+ u8 power_source;
+ u8 mode;
+ bool open_drain;
+ bool output_value;
+ u8 bias;
+ u8 pull_up_strength;
+ u8 output_strength;
+ bool disable;
+ u8 function;
+ bool inverted;
+};
+
+struct pm8xxx_gpio {
+ struct device *dev;
+ struct regmap *regmap;
+ struct pinctrl_dev *pctrl;
+ struct gpio_chip chip;
+
+ struct pinctrl_desc desc;
+ unsigned npins;
+};
+
+static const struct pinconf_generic_params pm8xxx_gpio_bindings[] = {
+ {"qcom,drive-strength", PM8XXX_QCOM_DRIVE_STRENGH, 0},
+ {"qcom,pull-up-strength", PM8XXX_QCOM_PULL_UP_STRENGTH, 0},
+};
+
+#ifdef CONFIG_DEBUG_FS
+static const struct pin_config_item pm8xxx_conf_items[ARRAY_SIZE(pm8xxx_gpio_bindings)] = {
+ PCONFDUMP(PM8XXX_QCOM_DRIVE_STRENGH, "drive-strength", NULL, true),
+ PCONFDUMP(PM8XXX_QCOM_PULL_UP_STRENGTH, "pull up strength", NULL, true),
+};
+#endif
+
+static const char * const pm8xxx_groups[PM8XXX_MAX_GPIOS] = {
+ "gpio1", "gpio2", "gpio3", "gpio4", "gpio5", "gpio6", "gpio7", "gpio8",
+ "gpio9", "gpio10", "gpio11", "gpio12", "gpio13", "gpio14", "gpio15",
+ "gpio16", "gpio17", "gpio18", "gpio19", "gpio20", "gpio21", "gpio22",
+ "gpio23", "gpio24", "gpio25", "gpio26", "gpio27", "gpio28", "gpio29",
+ "gpio30", "gpio31", "gpio32", "gpio33", "gpio34", "gpio35", "gpio36",
+ "gpio37", "gpio38", "gpio39", "gpio40", "gpio41", "gpio42", "gpio43",
+ "gpio44",
+};
+
+static const char * const pm8xxx_gpio_functions[] = {
+ PMIC_GPIO_FUNC_NORMAL, PMIC_GPIO_FUNC_PAIRED,
+ PMIC_GPIO_FUNC_FUNC1, PMIC_GPIO_FUNC_FUNC2,
+ PMIC_GPIO_FUNC_DTEST1, PMIC_GPIO_FUNC_DTEST2,
+ PMIC_GPIO_FUNC_DTEST3, PMIC_GPIO_FUNC_DTEST4,
+};
+
+static int pm8xxx_read_bank(struct pm8xxx_gpio *pctrl,
+ struct pm8xxx_pin_data *pin, int bank)
+{
+ unsigned int val = bank << 4;
+ int ret;
+
+ ret = regmap_write(pctrl->regmap, pin->reg, val);
+ if (ret) {
+ dev_err(pctrl->dev, "failed to select bank %d\n", bank);
+ return ret;
+ }
+
+ ret = regmap_read(pctrl->regmap, pin->reg, &val);
+ if (ret) {
+ dev_err(pctrl->dev, "failed to read register %d\n", bank);
+ return ret;
+ }
+
+ return val;
+}
+
+static int pm8xxx_write_bank(struct pm8xxx_gpio *pctrl,
+ struct pm8xxx_pin_data *pin,
+ int bank,
+ u8 val)
+{
+ int ret;
+
+ val |= PM8XXX_BANK_WRITE;
+ val |= bank << 4;
+
+ ret = regmap_write(pctrl->regmap, pin->reg, val);
+ if (ret)
+ dev_err(pctrl->dev, "failed to write register\n");
+
+ return ret;
+}
+
+static int pm8xxx_get_groups_count(struct pinctrl_dev *pctldev)
+{
+ struct pm8xxx_gpio *pctrl = pinctrl_dev_get_drvdata(pctldev);
+
+ return pctrl->npins;
+}
+
+static const char *pm8xxx_get_group_name(struct pinctrl_dev *pctldev,
+ unsigned group)
+{
+ return pm8xxx_groups[group];
+}
+
+
+static int pm8xxx_get_group_pins(struct pinctrl_dev *pctldev,
+ unsigned group,
+ const unsigned **pins,
+ unsigned *num_pins)
+{
+ struct pm8xxx_gpio *pctrl = pinctrl_dev_get_drvdata(pctldev);
+
+ *pins = &pctrl->desc.pins[group].number;
+ *num_pins = 1;
+
+ return 0;
+}
+
+static const struct pinctrl_ops pm8xxx_pinctrl_ops = {
+ .get_groups_count = pm8xxx_get_groups_count,
+ .get_group_name = pm8xxx_get_group_name,
+ .get_group_pins = pm8xxx_get_group_pins,
+ .dt_node_to_map = pinconf_generic_dt_node_to_map_group,
+ .dt_free_map = pinctrl_utils_free_map,
+};
+
+static int pm8xxx_get_functions_count(struct pinctrl_dev *pctldev)
+{
+ return ARRAY_SIZE(pm8xxx_gpio_functions);
+}
+
+static const char *pm8xxx_get_function_name(struct pinctrl_dev *pctldev,
+ unsigned function)
+{
+ return pm8xxx_gpio_functions[function];
+}
+
+static int pm8xxx_get_function_groups(struct pinctrl_dev *pctldev,
+ unsigned function,
+ const char * const **groups,
+ unsigned * const num_groups)
+{
+ struct pm8xxx_gpio *pctrl = pinctrl_dev_get_drvdata(pctldev);
+
+ *groups = pm8xxx_groups;
+ *num_groups = pctrl->npins;
+ return 0;
+}
+
+static int pm8xxx_pinmux_set_mux(struct pinctrl_dev *pctldev,
+ unsigned function,
+ unsigned group)
+{
+ struct pm8xxx_gpio *pctrl = pinctrl_dev_get_drvdata(pctldev);
+ struct pm8xxx_pin_data *pin = pctrl->desc.pins[group].drv_data;
+ u8 val;
+
+ pin->function = function;
+ val = pin->function << 1;
+
+ pm8xxx_write_bank(pctrl, pin, 4, val);
+
+ return 0;
+}
+
+static const struct pinmux_ops pm8xxx_pinmux_ops = {
+ .get_functions_count = pm8xxx_get_functions_count,
+ .get_function_name = pm8xxx_get_function_name,
+ .get_function_groups = pm8xxx_get_function_groups,
+ .set_mux = pm8xxx_pinmux_set_mux,
+};
+
+static int pm8xxx_pin_config_get(struct pinctrl_dev *pctldev,
+ unsigned int offset,
+ unsigned long *config)
+{
+ struct pm8xxx_gpio *pctrl = pinctrl_dev_get_drvdata(pctldev);
+ struct pm8xxx_pin_data *pin = pctrl->desc.pins[offset].drv_data;
+ unsigned param = pinconf_to_config_param(*config);
+ unsigned arg;
+
+ switch (param) {
+ case PIN_CONFIG_BIAS_DISABLE:
+ if (pin->bias != PM8XXX_GPIO_BIAS_NP)
+ return -EINVAL;
+ arg = 1;
+ break;
+ case PIN_CONFIG_BIAS_PULL_DOWN:
+ if (pin->bias != PM8XXX_GPIO_BIAS_PD)
+ return -EINVAL;
+ arg = 1;
+ break;
+ case PIN_CONFIG_BIAS_PULL_UP:
+ if (pin->bias > PM8XXX_GPIO_BIAS_PU_1P5_30)
+ return -EINVAL;
+ arg = 1;
+ break;
+ case PM8XXX_QCOM_PULL_UP_STRENGTH:
+ arg = pin->pull_up_strength;
+ break;
+ case PIN_CONFIG_BIAS_HIGH_IMPEDANCE:
+ if (!pin->disable)
+ return -EINVAL;
+ arg = 1;
+ break;
+ case PIN_CONFIG_INPUT_ENABLE:
+ if (pin->mode != PM8XXX_GPIO_MODE_INPUT)
+ return -EINVAL;
+ arg = 1;
+ break;
+ case PIN_CONFIG_OUTPUT:
+ if (pin->mode & PM8XXX_GPIO_MODE_OUTPUT)
+ arg = pin->output_value;
+ else
+ arg = 0;
+ break;
+ case PIN_CONFIG_POWER_SOURCE:
+ arg = pin->power_source;
+ break;
+ case PM8XXX_QCOM_DRIVE_STRENGH:
+ arg = pin->output_strength;
+ break;
+ case PIN_CONFIG_DRIVE_PUSH_PULL:
+ if (pin->open_drain)
+ return -EINVAL;
+ arg = 1;
+ break;
+ case PIN_CONFIG_DRIVE_OPEN_DRAIN:
+ if (!pin->open_drain)
+ return -EINVAL;
+ arg = 1;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ *config = pinconf_to_config_packed(param, arg);
+
+ return 0;
+}
+
+static int pm8xxx_pin_config_set(struct pinctrl_dev *pctldev,
+ unsigned int offset,
+ unsigned long *configs,
+ unsigned num_configs)
+{
+ struct pm8xxx_gpio *pctrl = pinctrl_dev_get_drvdata(pctldev);
+ struct pm8xxx_pin_data *pin = pctrl->desc.pins[offset].drv_data;
+ unsigned param;
+ unsigned arg;
+ unsigned i;
+ u8 banks = 0;
+ u8 val;
+
+ for (i = 0; i < num_configs; i++) {
+ param = pinconf_to_config_param(configs[i]);
+ arg = pinconf_to_config_argument(configs[i]);
+
+ switch (param) {
+ case PIN_CONFIG_BIAS_DISABLE:
+ pin->bias = PM8XXX_GPIO_BIAS_NP;
+ banks |= BIT(2);
+ pin->disable = 0;
+ banks |= BIT(3);
+ break;
+ case PIN_CONFIG_BIAS_PULL_DOWN:
+ pin->bias = PM8XXX_GPIO_BIAS_PD;
+ banks |= BIT(2);
+ pin->disable = 0;
+ banks |= BIT(3);
+ break;
+ case PM8XXX_QCOM_PULL_UP_STRENGTH:
+ if (arg > PM8XXX_GPIO_BIAS_PU_1P5_30) {
+ dev_err(pctrl->dev, "invalid pull-up strength\n");
+ return -EINVAL;
+ }
+ pin->pull_up_strength = arg;
+ fallthrough;
+ case PIN_CONFIG_BIAS_PULL_UP:
+ pin->bias = pin->pull_up_strength;
+ banks |= BIT(2);
+ pin->disable = 0;
+ banks |= BIT(3);
+ break;
+ case PIN_CONFIG_BIAS_HIGH_IMPEDANCE:
+ pin->disable = 1;
+ banks |= BIT(3);
+ break;
+ case PIN_CONFIG_INPUT_ENABLE:
+ pin->mode = PM8XXX_GPIO_MODE_INPUT;
+ banks |= BIT(0) | BIT(1);
+ break;
+ case PIN_CONFIG_OUTPUT:
+ pin->mode = PM8XXX_GPIO_MODE_OUTPUT;
+ pin->output_value = !!arg;
+ banks |= BIT(0) | BIT(1);
+ break;
+ case PIN_CONFIG_POWER_SOURCE:
+ pin->power_source = arg;
+ banks |= BIT(0);
+ break;
+ case PM8XXX_QCOM_DRIVE_STRENGH:
+ if (arg > PMIC_GPIO_STRENGTH_LOW) {
+ dev_err(pctrl->dev, "invalid drive strength\n");
+ return -EINVAL;
+ }
+ pin->output_strength = arg;
+ banks |= BIT(3);
+ break;
+ case PIN_CONFIG_DRIVE_PUSH_PULL:
+ pin->open_drain = 0;
+ banks |= BIT(1);
+ break;
+ case PIN_CONFIG_DRIVE_OPEN_DRAIN:
+ pin->open_drain = 1;
+ banks |= BIT(1);
+ break;
+ default:
+ dev_err(pctrl->dev,
+ "unsupported config parameter: %x\n",
+ param);
+ return -EINVAL;
+ }
+ }
+
+ if (banks & BIT(0)) {
+ val = pin->power_source << 1;
+ val |= PM8XXX_GPIO_MODE_ENABLED;
+ pm8xxx_write_bank(pctrl, pin, 0, val);
+ }
+
+ if (banks & BIT(1)) {
+ val = pin->mode << 2;
+ val |= pin->open_drain << 1;
+ val |= pin->output_value;
+ pm8xxx_write_bank(pctrl, pin, 1, val);
+ }
+
+ if (banks & BIT(2)) {
+ val = pin->bias << 1;
+ pm8xxx_write_bank(pctrl, pin, 2, val);
+ }
+
+ if (banks & BIT(3)) {
+ val = pin->output_strength << 2;
+ val |= pin->disable;
+ pm8xxx_write_bank(pctrl, pin, 3, val);
+ }
+
+ if (banks & BIT(4)) {
+ val = pin->function << 1;
+ pm8xxx_write_bank(pctrl, pin, 4, val);
+ }
+
+ if (banks & BIT(5)) {
+ val = 0;
+ if (!pin->inverted)
+ val |= BIT(3);
+ pm8xxx_write_bank(pctrl, pin, 5, val);
+ }
+
+ return 0;
+}
+
+static const struct pinconf_ops pm8xxx_pinconf_ops = {
+ .is_generic = true,
+ .pin_config_group_get = pm8xxx_pin_config_get,
+ .pin_config_group_set = pm8xxx_pin_config_set,
+};
+
+static const struct pinctrl_desc pm8xxx_pinctrl_desc = {
+ .name = "pm8xxx_gpio",
+ .pctlops = &pm8xxx_pinctrl_ops,
+ .pmxops = &pm8xxx_pinmux_ops,
+ .confops = &pm8xxx_pinconf_ops,
+ .owner = THIS_MODULE,
+};
+
+static int pm8xxx_gpio_direction_input(struct gpio_chip *chip,
+ unsigned offset)
+{
+ struct pm8xxx_gpio *pctrl = gpiochip_get_data(chip);
+ struct pm8xxx_pin_data *pin = pctrl->desc.pins[offset].drv_data;
+ u8 val;
+
+ pin->mode = PM8XXX_GPIO_MODE_INPUT;
+ val = pin->mode << 2;
+
+ pm8xxx_write_bank(pctrl, pin, 1, val);
+
+ return 0;
+}
+
+static int pm8xxx_gpio_direction_output(struct gpio_chip *chip,
+ unsigned offset,
+ int value)
+{
+ struct pm8xxx_gpio *pctrl = gpiochip_get_data(chip);
+ struct pm8xxx_pin_data *pin = pctrl->desc.pins[offset].drv_data;
+ u8 val;
+
+ pin->mode = PM8XXX_GPIO_MODE_OUTPUT;
+ pin->output_value = !!value;
+
+ val = pin->mode << 2;
+ val |= pin->open_drain << 1;
+ val |= pin->output_value;
+
+ pm8xxx_write_bank(pctrl, pin, 1, val);
+
+ return 0;
+}
+
+static int pm8xxx_gpio_get(struct gpio_chip *chip, unsigned offset)
+{
+ struct pm8xxx_gpio *pctrl = gpiochip_get_data(chip);
+ struct pm8xxx_pin_data *pin = pctrl->desc.pins[offset].drv_data;
+ int ret, irq;
+ bool state;
+
+ if (pin->mode == PM8XXX_GPIO_MODE_OUTPUT)
+ return pin->output_value;
+
+ irq = chip->to_irq(chip, offset);
+ if (irq >= 0) {
+ ret = irq_get_irqchip_state(irq, IRQCHIP_STATE_LINE_LEVEL,
+ &state);
+ if (!ret)
+ ret = !!state;
+ } else
+ ret = -EINVAL;
+
+ return ret;
+}
+
+static void pm8xxx_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
+{
+ struct pm8xxx_gpio *pctrl = gpiochip_get_data(chip);
+ struct pm8xxx_pin_data *pin = pctrl->desc.pins[offset].drv_data;
+ u8 val;
+
+ pin->output_value = !!value;
+
+ val = pin->mode << 2;
+ val |= pin->open_drain << 1;
+ val |= pin->output_value;
+
+ pm8xxx_write_bank(pctrl, pin, 1, val);
+}
+
+static int pm8xxx_gpio_of_xlate(struct gpio_chip *chip,
+ const struct of_phandle_args *gpio_desc,
+ u32 *flags)
+{
+ if (chip->of_gpio_n_cells < 2)
+ return -EINVAL;
+
+ if (flags)
+ *flags = gpio_desc->args[1];
+
+ return gpio_desc->args[0] - PM8XXX_GPIO_PHYSICAL_OFFSET;
+}
+
+
+#ifdef CONFIG_DEBUG_FS
+#include <linux/seq_file.h>
+
+static void pm8xxx_gpio_dbg_show_one(struct seq_file *s,
+ struct pinctrl_dev *pctldev,
+ struct gpio_chip *chip,
+ unsigned offset,
+ unsigned gpio)
+{
+ struct pm8xxx_gpio *pctrl = gpiochip_get_data(chip);
+ struct pm8xxx_pin_data *pin = pctrl->desc.pins[offset].drv_data;
+
+ static const char * const modes[] = {
+ "in", "both", "out", "off"
+ };
+ static const char * const biases[] = {
+ "pull-up 30uA", "pull-up 1.5uA", "pull-up 31.5uA",
+ "pull-up 1.5uA + 30uA boost", "pull-down 10uA", "no pull"
+ };
+ static const char * const buffer_types[] = {
+ "push-pull", "open-drain"
+ };
+ static const char * const strengths[] = {
+ "no", "high", "medium", "low"
+ };
+
+ seq_printf(s, " gpio%-2d:", offset + PM8XXX_GPIO_PHYSICAL_OFFSET);
+ if (pin->disable) {
+ seq_puts(s, " ---");
+ } else {
+ seq_printf(s, " %-4s", modes[pin->mode]);
+ seq_printf(s, " %-7s", pm8xxx_gpio_functions[pin->function]);
+ seq_printf(s, " VIN%d", pin->power_source);
+ seq_printf(s, " %-27s", biases[pin->bias]);
+ seq_printf(s, " %-10s", buffer_types[pin->open_drain]);
+ seq_printf(s, " %-4s", pin->output_value ? "high" : "low");
+ seq_printf(s, " %-7s", strengths[pin->output_strength]);
+ if (pin->inverted)
+ seq_puts(s, " inverted");
+ }
+}
+
+static void pm8xxx_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip)
+{
+ unsigned gpio = chip->base;
+ unsigned i;
+
+ for (i = 0; i < chip->ngpio; i++, gpio++) {
+ pm8xxx_gpio_dbg_show_one(s, NULL, chip, i, gpio);
+ seq_puts(s, "\n");
+ }
+}
+
+#else
+#define pm8xxx_gpio_dbg_show NULL
+#endif
+
+static const struct gpio_chip pm8xxx_gpio_template = {
+ .direction_input = pm8xxx_gpio_direction_input,
+ .direction_output = pm8xxx_gpio_direction_output,
+ .get = pm8xxx_gpio_get,
+ .set = pm8xxx_gpio_set,
+ .of_xlate = pm8xxx_gpio_of_xlate,
+ .dbg_show = pm8xxx_gpio_dbg_show,
+ .owner = THIS_MODULE,
+};
+
+static int pm8xxx_pin_populate(struct pm8xxx_gpio *pctrl,
+ struct pm8xxx_pin_data *pin)
+{
+ int val;
+
+ val = pm8xxx_read_bank(pctrl, pin, 0);
+ if (val < 0)
+ return val;
+
+ pin->power_source = (val >> 1) & 0x7;
+
+ val = pm8xxx_read_bank(pctrl, pin, 1);
+ if (val < 0)
+ return val;
+
+ pin->mode = (val >> 2) & 0x3;
+ pin->open_drain = !!(val & BIT(1));
+ pin->output_value = val & BIT(0);
+
+ val = pm8xxx_read_bank(pctrl, pin, 2);
+ if (val < 0)
+ return val;
+
+ pin->bias = (val >> 1) & 0x7;
+ if (pin->bias <= PM8XXX_GPIO_BIAS_PU_1P5_30)
+ pin->pull_up_strength = pin->bias;
+ else
+ pin->pull_up_strength = PM8XXX_GPIO_BIAS_PU_30;
+
+ val = pm8xxx_read_bank(pctrl, pin, 3);
+ if (val < 0)
+ return val;
+
+ pin->output_strength = (val >> 2) & 0x3;
+ pin->disable = val & BIT(0);
+
+ val = pm8xxx_read_bank(pctrl, pin, 4);
+ if (val < 0)
+ return val;
+
+ pin->function = (val >> 1) & 0x7;
+
+ val = pm8xxx_read_bank(pctrl, pin, 5);
+ if (val < 0)
+ return val;
+
+ pin->inverted = !(val & BIT(3));
+
+ return 0;
+}
+
+static struct irq_chip pm8xxx_irq_chip = {
+ .name = "ssbi-gpio",
+ .irq_mask_ack = irq_chip_mask_ack_parent,
+ .irq_unmask = irq_chip_unmask_parent,
+ .irq_set_type = irq_chip_set_type_parent,
+ .flags = IRQCHIP_MASK_ON_SUSPEND | IRQCHIP_SKIP_SET_WAKE,
+};
+
+static int pm8xxx_domain_translate(struct irq_domain *domain,
+ struct irq_fwspec *fwspec,
+ unsigned long *hwirq,
+ unsigned int *type)
+{
+ struct pm8xxx_gpio *pctrl = container_of(domain->host_data,
+ struct pm8xxx_gpio, chip);
+
+ if (fwspec->param_count != 2 || fwspec->param[0] < 1 ||
+ fwspec->param[0] > pctrl->chip.ngpio)
+ return -EINVAL;
+
+ *hwirq = fwspec->param[0] - PM8XXX_GPIO_PHYSICAL_OFFSET;
+ *type = fwspec->param[1];
+
+ return 0;
+}
+
+static unsigned int pm8xxx_child_offset_to_irq(struct gpio_chip *chip,
+ unsigned int offset)
+{
+ return offset + PM8XXX_GPIO_PHYSICAL_OFFSET;
+}
+
+static int pm8xxx_child_to_parent_hwirq(struct gpio_chip *chip,
+ unsigned int child_hwirq,
+ unsigned int child_type,
+ unsigned int *parent_hwirq,
+ unsigned int *parent_type)
+{
+ *parent_hwirq = child_hwirq + 0xc0;
+ *parent_type = child_type;
+
+ return 0;
+}
+
+static const struct of_device_id pm8xxx_gpio_of_match[] = {
+ { .compatible = "qcom,pm8018-gpio", .data = (void *) 6 },
+ { .compatible = "qcom,pm8038-gpio", .data = (void *) 12 },
+ { .compatible = "qcom,pm8058-gpio", .data = (void *) 44 },
+ { .compatible = "qcom,pm8917-gpio", .data = (void *) 38 },
+ { .compatible = "qcom,pm8921-gpio", .data = (void *) 44 },
+ { },
+};
+MODULE_DEVICE_TABLE(of, pm8xxx_gpio_of_match);
+
+static int pm8xxx_gpio_probe(struct platform_device *pdev)
+{
+ struct pm8xxx_pin_data *pin_data;
+ struct irq_domain *parent_domain;
+ struct device_node *parent_node;
+ struct pinctrl_pin_desc *pins;
+ struct gpio_irq_chip *girq;
+ struct pm8xxx_gpio *pctrl;
+ int ret, i;
+
+ pctrl = devm_kzalloc(&pdev->dev, sizeof(*pctrl), GFP_KERNEL);
+ if (!pctrl)
+ return -ENOMEM;
+
+ pctrl->dev = &pdev->dev;
+ pctrl->npins = (uintptr_t) device_get_match_data(&pdev->dev);
+
+ pctrl->regmap = dev_get_regmap(pdev->dev.parent, NULL);
+ if (!pctrl->regmap) {
+ dev_err(&pdev->dev, "parent regmap unavailable\n");
+ return -ENXIO;
+ }
+
+ pctrl->desc = pm8xxx_pinctrl_desc;
+ pctrl->desc.npins = pctrl->npins;
+
+ pins = devm_kcalloc(&pdev->dev,
+ pctrl->desc.npins,
+ sizeof(struct pinctrl_pin_desc),
+ GFP_KERNEL);
+ if (!pins)
+ return -ENOMEM;
+
+ pin_data = devm_kcalloc(&pdev->dev,
+ pctrl->desc.npins,
+ sizeof(struct pm8xxx_pin_data),
+ GFP_KERNEL);
+ if (!pin_data)
+ return -ENOMEM;
+
+ for (i = 0; i < pctrl->desc.npins; i++) {
+ pin_data[i].reg = SSBI_REG_ADDR_GPIO(i);
+
+ ret = pm8xxx_pin_populate(pctrl, &pin_data[i]);
+ if (ret)
+ return ret;
+
+ pins[i].number = i;
+ pins[i].name = pm8xxx_groups[i];
+ pins[i].drv_data = &pin_data[i];
+ }
+ pctrl->desc.pins = pins;
+
+ pctrl->desc.num_custom_params = ARRAY_SIZE(pm8xxx_gpio_bindings);
+ pctrl->desc.custom_params = pm8xxx_gpio_bindings;
+#ifdef CONFIG_DEBUG_FS
+ pctrl->desc.custom_conf_items = pm8xxx_conf_items;
+#endif
+
+ pctrl->pctrl = devm_pinctrl_register(&pdev->dev, &pctrl->desc, pctrl);
+ if (IS_ERR(pctrl->pctrl)) {
+ dev_err(&pdev->dev, "couldn't register pm8xxx gpio driver\n");
+ return PTR_ERR(pctrl->pctrl);
+ }
+
+ pctrl->chip = pm8xxx_gpio_template;
+ pctrl->chip.base = -1;
+ pctrl->chip.parent = &pdev->dev;
+ pctrl->chip.of_gpio_n_cells = 2;
+ pctrl->chip.label = dev_name(pctrl->dev);
+ pctrl->chip.ngpio = pctrl->npins;
+
+ parent_node = of_irq_find_parent(pctrl->dev->of_node);
+ if (!parent_node)
+ return -ENXIO;
+
+ parent_domain = irq_find_host(parent_node);
+ of_node_put(parent_node);
+ if (!parent_domain)
+ return -ENXIO;
+
+ girq = &pctrl->chip.irq;
+ girq->chip = &pm8xxx_irq_chip;
+ girq->default_type = IRQ_TYPE_NONE;
+ girq->handler = handle_level_irq;
+ girq->fwnode = of_node_to_fwnode(pctrl->dev->of_node);
+ girq->parent_domain = parent_domain;
+ girq->child_to_parent_hwirq = pm8xxx_child_to_parent_hwirq;
+ girq->populate_parent_alloc_arg = gpiochip_populate_parent_fwspec_twocell;
+ girq->child_offset_to_irq = pm8xxx_child_offset_to_irq;
+ girq->child_irq_domain_ops.translate = pm8xxx_domain_translate;
+
+ ret = gpiochip_add_data(&pctrl->chip, pctrl);
+ if (ret) {
+ dev_err(&pdev->dev, "failed register gpiochip\n");
+ return ret;
+ }
+
+ /*
+ * For DeviceTree-supported systems, the gpio core checks the
+ * pinctrl's device node for the "gpio-ranges" property.
+ * If it is present, it takes care of adding the pin ranges
+ * for the driver. In this case the driver can skip ahead.
+ *
+ * In order to remain compatible with older, existing DeviceTree
+ * files which don't set the "gpio-ranges" property or systems that
+ * utilize ACPI the driver has to call gpiochip_add_pin_range().
+ */
+ if (!of_property_read_bool(pctrl->dev->of_node, "gpio-ranges")) {
+ ret = gpiochip_add_pin_range(&pctrl->chip, dev_name(pctrl->dev),
+ 0, 0, pctrl->chip.ngpio);
+ if (ret) {
+ dev_err(pctrl->dev, "failed to add pin range\n");
+ goto unregister_gpiochip;
+ }
+ }
+
+ platform_set_drvdata(pdev, pctrl);
+
+ dev_dbg(&pdev->dev, "Qualcomm pm8xxx gpio driver probed\n");
+
+ return 0;
+
+unregister_gpiochip:
+ gpiochip_remove(&pctrl->chip);
+
+ return ret;
+}
+
+static int pm8xxx_gpio_remove(struct platform_device *pdev)
+{
+ struct pm8xxx_gpio *pctrl = platform_get_drvdata(pdev);
+
+ gpiochip_remove(&pctrl->chip);
+
+ return 0;
+}
+
+static struct platform_driver pm8xxx_gpio_driver = {
+ .driver = {
+ .name = "qcom-ssbi-gpio",
+ .of_match_table = pm8xxx_gpio_of_match,
+ },
+ .probe = pm8xxx_gpio_probe,
+ .remove = pm8xxx_gpio_remove,
+};
+
+module_platform_driver(pm8xxx_gpio_driver);
+
+MODULE_AUTHOR("Bjorn Andersson <bjorn.andersson@sonymobile.com>");
+MODULE_DESCRIPTION("Qualcomm PM8xxx GPIO driver");
+MODULE_LICENSE("GPL v2");
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-18 19:50:00 +0000