/* * Copyright (c) 2012-2014, The Linux Foundation. All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 and * only version 2 as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. */ #include #include #include #include #include #include #include #include #include #include #include #include #include "../core.h" #include "../pinctrl-utils.h" #define PMIC_GPIO_ADDRESS_RANGE 0x100 /* type and subtype registers base address offsets */ #define PMIC_GPIO_REG_TYPE 0x4 #define PMIC_GPIO_REG_SUBTYPE 0x5 /* GPIO peripheral type and subtype out_values */ #define PMIC_GPIO_TYPE 0x10 #define PMIC_GPIO_SUBTYPE_GPIO_4CH 0x1 #define PMIC_GPIO_SUBTYPE_GPIOC_4CH 0x5 #define PMIC_GPIO_SUBTYPE_GPIO_8CH 0x9 #define PMIC_GPIO_SUBTYPE_GPIOC_8CH 0xd #define PMIC_GPIO_SUBTYPE_GPIO_LV 0x10 #define PMIC_GPIO_SUBTYPE_GPIO_MV 0x11 #define PMIC_MPP_REG_RT_STS 0x10 #define PMIC_MPP_REG_RT_STS_VAL_MASK 0x1 /* control register base address offsets */ #define PMIC_GPIO_REG_MODE_CTL 0x40 #define PMIC_GPIO_REG_DIG_VIN_CTL 0x41 #define PMIC_GPIO_REG_DIG_PULL_CTL 0x42 #define PMIC_GPIO_REG_LV_MV_DIG_OUT_SOURCE_CTL 0x44 #define PMIC_GPIO_REG_DIG_IN_CTL 0x43 #define PMIC_GPIO_REG_DIG_OUT_CTL 0x45 #define PMIC_GPIO_REG_EN_CTL 0x46 #define PMIC_GPIO_REG_LV_MV_ANA_PASS_THRU_SEL 0x4A /* PMIC_GPIO_REG_MODE_CTL */ #define PMIC_GPIO_REG_MODE_VALUE_SHIFT 0x1 #define PMIC_GPIO_REG_MODE_FUNCTION_SHIFT 1 #define PMIC_GPIO_REG_MODE_FUNCTION_MASK 0x7 #define PMIC_GPIO_REG_MODE_DIR_SHIFT 4 #define PMIC_GPIO_REG_MODE_DIR_MASK 0x7 #define PMIC_GPIO_MODE_DIGITAL_INPUT 0 #define PMIC_GPIO_MODE_DIGITAL_OUTPUT 1 #define PMIC_GPIO_MODE_DIGITAL_INPUT_OUTPUT 2 #define PMIC_GPIO_MODE_ANALOG_PASS_THRU 3 #define PMIC_GPIO_REG_LV_MV_MODE_DIR_MASK 0x3 /* PMIC_GPIO_REG_DIG_VIN_CTL */ #define PMIC_GPIO_REG_VIN_SHIFT 0 #define PMIC_GPIO_REG_VIN_MASK 0x7 /* PMIC_GPIO_REG_DIG_PULL_CTL */ #define PMIC_GPIO_REG_PULL_SHIFT 0 #define PMIC_GPIO_REG_PULL_MASK 0x7 #define PMIC_GPIO_PULL_DOWN 4 #define PMIC_GPIO_PULL_DISABLE 5 /* PMIC_GPIO_REG_LV_MV_DIG_OUT_SOURCE_CTL for LV/MV */ #define PMIC_GPIO_LV_MV_OUTPUT_INVERT 0x80 #define PMIC_GPIO_LV_MV_OUTPUT_INVERT_SHIFT 7 #define PMIC_GPIO_LV_MV_OUTPUT_SOURCE_SEL_MASK 0xF /* PMIC_GPIO_REG_DIG_IN_CTL */ #define PMIC_GPIO_LV_MV_DIG_IN_DTEST_EN 0x80 #define PMIC_GPIO_LV_MV_DIG_IN_DTEST_SEL_MASK 0x7 #define PMIC_GPIO_DIG_IN_DTEST_SEL_MASK 0xf /* PMIC_GPIO_REG_DIG_OUT_CTL */ #define PMIC_GPIO_REG_OUT_STRENGTH_SHIFT 0 #define PMIC_GPIO_REG_OUT_STRENGTH_MASK 0x3 #define PMIC_GPIO_REG_OUT_TYPE_SHIFT 4 #define PMIC_GPIO_REG_OUT_TYPE_MASK 0x3 /* * Output type - indicates pin should be configured as push-pull, * open drain or open source. */ #define PMIC_GPIO_OUT_BUF_CMOS 0 #define PMIC_GPIO_OUT_BUF_OPEN_DRAIN_NMOS 1 #define PMIC_GPIO_OUT_BUF_OPEN_DRAIN_PMOS 2 /* PMIC_GPIO_REG_EN_CTL */ #define PMIC_GPIO_REG_MASTER_EN_SHIFT 7 #define PMIC_GPIO_PHYSICAL_OFFSET 1 /* PMIC_GPIO_REG_LV_MV_ANA_PASS_THRU_SEL */ #define PMIC_GPIO_LV_MV_ANA_MUX_SEL_MASK 0x3 /* Qualcomm specific pin configurations */ #define PMIC_GPIO_CONF_PULL_UP (PIN_CONFIG_END + 1) #define PMIC_GPIO_CONF_STRENGTH (PIN_CONFIG_END + 2) #define PMIC_GPIO_CONF_ATEST (PIN_CONFIG_END + 3) #define PMIC_GPIO_CONF_ANALOG_PASS (PIN_CONFIG_END + 4) #define PMIC_GPIO_CONF_DTEST_BUFFER (PIN_CONFIG_END + 5) /* The index of each function in pmic_gpio_functions[] array */ enum pmic_gpio_func_index { PMIC_GPIO_FUNC_INDEX_NORMAL, PMIC_GPIO_FUNC_INDEX_PAIRED, PMIC_GPIO_FUNC_INDEX_FUNC1, PMIC_GPIO_FUNC_INDEX_FUNC2, PMIC_GPIO_FUNC_INDEX_FUNC3, PMIC_GPIO_FUNC_INDEX_FUNC4, PMIC_GPIO_FUNC_INDEX_DTEST1, PMIC_GPIO_FUNC_INDEX_DTEST2, PMIC_GPIO_FUNC_INDEX_DTEST3, PMIC_GPIO_FUNC_INDEX_DTEST4, }; /** * struct pmic_gpio_pad - keep current GPIO settings * @base: Address base in SPMI device. * @irq: IRQ number which this GPIO generate. * @is_enabled: Set to false when GPIO should be put in high Z state. * @out_value: Cached pin output value * @have_buffer: Set to true if GPIO output could be configured in push-pull, * open-drain or open-source mode. * @output_enabled: Set to true if GPIO output logic is enabled. * @input_enabled: Set to true if GPIO input buffer logic is enabled. * @analog_pass: Set to true if GPIO is in analog-pass-through mode. * @lv_mv_type: Set to true if GPIO subtype is GPIO_LV(0x10) or GPIO_MV(0x11). * @num_sources: Number of power-sources supported by this GPIO. * @power_source: Current power-source used. * @buffer_type: Push-pull, open-drain or open-source. * @pullup: Constant current which flow trough GPIO output buffer. * @strength: No, Low, Medium, High * @function: See pmic_gpio_functions[] * @atest: the ATEST selection for GPIO analog-pass-through mode * @dtest_buffer: the DTEST buffer selection for digital input mode. */ struct pmic_gpio_pad { u16 base; int irq; bool is_enabled; bool out_value; bool have_buffer; bool output_enabled; bool input_enabled; bool analog_pass; bool lv_mv_type; unsigned int num_sources; unsigned int power_source; unsigned int buffer_type; unsigned int pullup; unsigned int strength; unsigned int function; unsigned int atest; unsigned int dtest_buffer; }; struct pmic_gpio_state { struct device *dev; struct regmap *map; struct pinctrl_dev *ctrl; struct gpio_chip chip; }; static const struct pinconf_generic_params pmic_gpio_bindings[] = { {"qcom,pull-up-strength", PMIC_GPIO_CONF_PULL_UP, 0}, {"qcom,drive-strength", PMIC_GPIO_CONF_STRENGTH, 0}, {"qcom,atest", PMIC_GPIO_CONF_ATEST, 0}, {"qcom,analog-pass", PMIC_GPIO_CONF_ANALOG_PASS, 0}, {"qcom,dtest-buffer", PMIC_GPIO_CONF_DTEST_BUFFER, 0}, }; #ifdef CONFIG_DEBUG_FS static const struct pin_config_item pmic_conf_items[ARRAY_SIZE(pmic_gpio_bindings)] = { PCONFDUMP(PMIC_GPIO_CONF_PULL_UP, "pull up strength", NULL, true), PCONFDUMP(PMIC_GPIO_CONF_STRENGTH, "drive-strength", NULL, true), PCONFDUMP(PMIC_GPIO_CONF_ATEST, "atest", NULL, true), PCONFDUMP(PMIC_GPIO_CONF_ANALOG_PASS, "analog-pass", NULL, true), PCONFDUMP(PMIC_GPIO_CONF_DTEST_BUFFER, "dtest-buffer", NULL, true), }; #endif static const char *const pmic_gpio_groups[] = { "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", }; static const char *const pmic_gpio_functions[] = { [PMIC_GPIO_FUNC_INDEX_NORMAL] = PMIC_GPIO_FUNC_NORMAL, [PMIC_GPIO_FUNC_INDEX_PAIRED] = PMIC_GPIO_FUNC_PAIRED, [PMIC_GPIO_FUNC_INDEX_FUNC1] = PMIC_GPIO_FUNC_FUNC1, [PMIC_GPIO_FUNC_INDEX_FUNC2] = PMIC_GPIO_FUNC_FUNC2, [PMIC_GPIO_FUNC_INDEX_FUNC3] = PMIC_GPIO_FUNC_FUNC3, [PMIC_GPIO_FUNC_INDEX_FUNC4] = PMIC_GPIO_FUNC_FUNC4, [PMIC_GPIO_FUNC_INDEX_DTEST1] = PMIC_GPIO_FUNC_DTEST1, [PMIC_GPIO_FUNC_INDEX_DTEST2] = PMIC_GPIO_FUNC_DTEST2, [PMIC_GPIO_FUNC_INDEX_DTEST3] = PMIC_GPIO_FUNC_DTEST3, [PMIC_GPIO_FUNC_INDEX_DTEST4] = PMIC_GPIO_FUNC_DTEST4, }; static int pmic_gpio_read(struct pmic_gpio_state *state, struct pmic_gpio_pad *pad, unsigned int addr) { unsigned int val; int ret; ret = regmap_read(state->map, pad->base + addr, &val); if (ret < 0) dev_err(state->dev, "read 0x%x failed\n", addr); else ret = val; return ret; } static int pmic_gpio_write(struct pmic_gpio_state *state, struct pmic_gpio_pad *pad, unsigned int addr, unsigned int val) { int ret; ret = regmap_write(state->map, pad->base + addr, val); if (ret < 0) dev_err(state->dev, "write 0x%x failed\n", addr); return ret; } static int pmic_gpio_get_groups_count(struct pinctrl_dev *pctldev) { /* Every PIN is a group */ return pctldev->desc->npins; } static const char *pmic_gpio_get_group_name(struct pinctrl_dev *pctldev, unsigned pin) { return pctldev->desc->pins[pin].name; } static int pmic_gpio_get_group_pins(struct pinctrl_dev *pctldev, unsigned pin, const unsigned **pins, unsigned *num_pins) { *pins = &pctldev->desc->pins[pin].number; *num_pins = 1; return 0; } static const struct pinctrl_ops pmic_gpio_pinctrl_ops = { .get_groups_count = pmic_gpio_get_groups_count, .get_group_name = pmic_gpio_get_group_name, .get_group_pins = pmic_gpio_get_group_pins, .dt_node_to_map = pinconf_generic_dt_node_to_map_group, .dt_free_map = pinctrl_utils_free_map, }; static int pmic_gpio_get_functions_count(struct pinctrl_dev *pctldev) { return ARRAY_SIZE(pmic_gpio_functions); } static const char *pmic_gpio_get_function_name(struct pinctrl_dev *pctldev, unsigned function) { return pmic_gpio_functions[function]; } static int pmic_gpio_get_function_groups(struct pinctrl_dev *pctldev, unsigned function, const char *const **groups, unsigned *const num_qgroups) { *groups = pmic_gpio_groups; *num_qgroups = pctldev->desc->npins; return 0; } static int pmic_gpio_set_mux(struct pinctrl_dev *pctldev, unsigned function, unsigned pin) { struct pmic_gpio_state *state = pinctrl_dev_get_drvdata(pctldev); struct pmic_gpio_pad *pad; unsigned int val; int ret; if (function > PMIC_GPIO_FUNC_INDEX_DTEST4) { pr_err("function: %d is not defined\n", function); return -EINVAL; } pad = pctldev->desc->pins[pin].drv_data; /* * Non-LV/MV subtypes only support 2 special functions, * offsetting the dtestx function values by 2 */ if (!pad->lv_mv_type) { if (function == PMIC_GPIO_FUNC_INDEX_FUNC3 || function == PMIC_GPIO_FUNC_INDEX_FUNC4) { pr_err("LV/MV subtype doesn't have func3/func4\n"); return -EINVAL; } if (function >= PMIC_GPIO_FUNC_INDEX_DTEST1) function -= (PMIC_GPIO_FUNC_INDEX_DTEST1 - PMIC_GPIO_FUNC_INDEX_FUNC3); } pad->function = function; if (pad->analog_pass) val = PMIC_GPIO_MODE_ANALOG_PASS_THRU; else if (pad->output_enabled && pad->input_enabled) val = PMIC_GPIO_MODE_DIGITAL_INPUT_OUTPUT; else if (pad->output_enabled) val = PMIC_GPIO_MODE_DIGITAL_OUTPUT; else val = PMIC_GPIO_MODE_DIGITAL_INPUT; if (pad->lv_mv_type) { ret = pmic_gpio_write(state, pad, PMIC_GPIO_REG_MODE_CTL, val); if (ret < 0) return ret; val = pad->atest - 1; ret = pmic_gpio_write(state, pad, PMIC_GPIO_REG_LV_MV_ANA_PASS_THRU_SEL, val); if (ret < 0) return ret; val = pad->out_value << PMIC_GPIO_LV_MV_OUTPUT_INVERT_SHIFT; val |= pad->function & PMIC_GPIO_LV_MV_OUTPUT_SOURCE_SEL_MASK; ret = pmic_gpio_write(state, pad, PMIC_GPIO_REG_LV_MV_DIG_OUT_SOURCE_CTL, val); if (ret < 0) return ret; } else { val = val << PMIC_GPIO_REG_MODE_DIR_SHIFT; val |= pad->function << PMIC_GPIO_REG_MODE_FUNCTION_SHIFT; val |= pad->out_value & PMIC_GPIO_REG_MODE_VALUE_SHIFT; ret = pmic_gpio_write(state, pad, PMIC_GPIO_REG_MODE_CTL, val); if (ret < 0) return ret; } val = pad->is_enabled << PMIC_GPIO_REG_MASTER_EN_SHIFT; return pmic_gpio_write(state, pad, PMIC_GPIO_REG_EN_CTL, val); } static const struct pinmux_ops pmic_gpio_pinmux_ops = { .get_functions_count = pmic_gpio_get_functions_count, .get_function_name = pmic_gpio_get_function_name, .get_function_groups = pmic_gpio_get_function_groups, .set_mux = pmic_gpio_set_mux, }; static int pmic_gpio_config_get(struct pinctrl_dev *pctldev, unsigned int pin, unsigned long *config) { unsigned param = pinconf_to_config_param(*config); struct pmic_gpio_pad *pad; unsigned arg; pad = pctldev->desc->pins[pin].drv_data; switch (param) { case PIN_CONFIG_DRIVE_PUSH_PULL: if (pad->buffer_type != PMIC_GPIO_OUT_BUF_CMOS) return -EINVAL; arg = 1; break; case PIN_CONFIG_DRIVE_OPEN_DRAIN: if (pad->buffer_type != PMIC_GPIO_OUT_BUF_OPEN_DRAIN_NMOS) return -EINVAL; arg = 1; break; case PIN_CONFIG_DRIVE_OPEN_SOURCE: if (pad->buffer_type != PMIC_GPIO_OUT_BUF_OPEN_DRAIN_PMOS) return -EINVAL; arg = 1; break; case PIN_CONFIG_BIAS_PULL_DOWN: if (pad->pullup != PMIC_GPIO_PULL_DOWN) return -EINVAL; arg = 1; break; case PIN_CONFIG_BIAS_DISABLE: if (pad->pullup != PMIC_GPIO_PULL_DISABLE) return -EINVAL; arg = 1; break; case PIN_CONFIG_BIAS_PULL_UP: if (pad->pullup != PMIC_GPIO_PULL_UP_30) return -EINVAL; arg = 1; break; case PIN_CONFIG_BIAS_HIGH_IMPEDANCE: if (pad->is_enabled) return -EINVAL; arg = 1; break; case PIN_CONFIG_POWER_SOURCE: arg = pad->power_source; break; case PIN_CONFIG_INPUT_ENABLE: if (!pad->input_enabled) return -EINVAL; arg = 1; break; case PIN_CONFIG_OUTPUT: arg = pad->out_value; break; case PMIC_GPIO_CONF_PULL_UP: arg = pad->pullup; break; case PMIC_GPIO_CONF_STRENGTH: arg = pad->strength; break; case PMIC_GPIO_CONF_ATEST: arg = pad->atest; break; case PMIC_GPIO_CONF_ANALOG_PASS: arg = pad->analog_pass; break; case PMIC_GPIO_CONF_DTEST_BUFFER: arg = pad->dtest_buffer; break; default: return -EINVAL; } *config = pinconf_to_config_packed(param, arg); return 0; } static int pmic_gpio_config_set(struct pinctrl_dev *pctldev, unsigned int pin, unsigned long *configs, unsigned nconfs) { struct pmic_gpio_state *state = pinctrl_dev_get_drvdata(pctldev); struct pmic_gpio_pad *pad; unsigned param, arg; unsigned int val; int i, ret; pad = pctldev->desc->pins[pin].drv_data; for (i = 0; i < nconfs; i++) { param = pinconf_to_config_param(configs[i]); arg = pinconf_to_config_argument(configs[i]); switch (param) { case PIN_CONFIG_DRIVE_PUSH_PULL: pad->buffer_type = PMIC_GPIO_OUT_BUF_CMOS; break; case PIN_CONFIG_DRIVE_OPEN_DRAIN: if (!pad->have_buffer) return -EINVAL; pad->buffer_type = PMIC_GPIO_OUT_BUF_OPEN_DRAIN_NMOS; break; case PIN_CONFIG_DRIVE_OPEN_SOURCE: if (!pad->have_buffer) return -EINVAL; pad->buffer_type = PMIC_GPIO_OUT_BUF_OPEN_DRAIN_PMOS; break; case PIN_CONFIG_BIAS_DISABLE: pad->pullup = PMIC_GPIO_PULL_DISABLE; break; case PIN_CONFIG_BIAS_PULL_UP: pad->pullup = PMIC_GPIO_PULL_UP_30; break; case PIN_CONFIG_BIAS_PULL_DOWN: if (arg) pad->pullup = PMIC_GPIO_PULL_DOWN; else pad->pullup = PMIC_GPIO_PULL_DISABLE; break; case PIN_CONFIG_BIAS_HIGH_IMPEDANCE: pad->is_enabled = false; break; case PIN_CONFIG_POWER_SOURCE: if (arg >= pad->num_sources) return -EINVAL; pad->power_source = arg; break; case PIN_CONFIG_INPUT_ENABLE: pad->input_enabled = arg ? true : false; break; case PIN_CONFIG_OUTPUT: pad->output_enabled = true; pad->out_value = arg; break; case PMIC_GPIO_CONF_PULL_UP: if (arg > PMIC_GPIO_PULL_UP_1P5_30) return -EINVAL; pad->pullup = arg; break; case PMIC_GPIO_CONF_STRENGTH: if (arg > PMIC_GPIO_STRENGTH_LOW) return -EINVAL; pad->strength = arg; break; case PMIC_GPIO_CONF_ATEST: if (!pad->lv_mv_type || arg > 4) return -EINVAL; pad->atest = arg; break; case PMIC_GPIO_CONF_ANALOG_PASS: if (!pad->lv_mv_type) return -EINVAL; pad->analog_pass = true; break; case PMIC_GPIO_CONF_DTEST_BUFFER: if (arg > 4) return -EINVAL; pad->dtest_buffer = arg; break; default: return -EINVAL; } } val = pad->power_source << PMIC_GPIO_REG_VIN_SHIFT; ret = pmic_gpio_write(state, pad, PMIC_GPIO_REG_DIG_VIN_CTL, val); if (ret < 0) return ret; val = pad->pullup << PMIC_GPIO_REG_PULL_SHIFT; ret = pmic_gpio_write(state, pad, PMIC_GPIO_REG_DIG_PULL_CTL, val); if (ret < 0) return ret; val = pad->buffer_type << PMIC_GPIO_REG_OUT_TYPE_SHIFT; val |= pad->strength << PMIC_GPIO_REG_OUT_STRENGTH_SHIFT; ret = pmic_gpio_write(state, pad, PMIC_GPIO_REG_DIG_OUT_CTL, val); if (ret < 0) return ret; if (pad->dtest_buffer == 0) { val = 0; } else { if (pad->lv_mv_type) { val = pad->dtest_buffer - 1; val |= PMIC_GPIO_LV_MV_DIG_IN_DTEST_EN; } else { val = BIT(pad->dtest_buffer - 1); } } ret = pmic_gpio_write(state, pad, PMIC_GPIO_REG_DIG_IN_CTL, val); if (ret < 0) return ret; if (pad->analog_pass) val = PMIC_GPIO_MODE_ANALOG_PASS_THRU; else if (pad->output_enabled && pad->input_enabled) val = PMIC_GPIO_MODE_DIGITAL_INPUT_OUTPUT; else if (pad->output_enabled) val = PMIC_GPIO_MODE_DIGITAL_OUTPUT; else val = PMIC_GPIO_MODE_DIGITAL_INPUT; if (pad->lv_mv_type) { ret = pmic_gpio_write(state, pad, PMIC_GPIO_REG_MODE_CTL, val); if (ret < 0) return ret; val = pad->atest - 1; ret = pmic_gpio_write(state, pad, PMIC_GPIO_REG_LV_MV_ANA_PASS_THRU_SEL, val); if (ret < 0) return ret; val = pad->out_value << PMIC_GPIO_LV_MV_OUTPUT_INVERT_SHIFT; val |= pad->function & PMIC_GPIO_LV_MV_OUTPUT_SOURCE_SEL_MASK; ret = pmic_gpio_write(state, pad, PMIC_GPIO_REG_LV_MV_DIG_OUT_SOURCE_CTL, val); if (ret < 0) return ret; } else { val = val << PMIC_GPIO_REG_MODE_DIR_SHIFT; val |= pad->function << PMIC_GPIO_REG_MODE_FUNCTION_SHIFT; val |= pad->out_value & PMIC_GPIO_REG_MODE_VALUE_SHIFT; ret = pmic_gpio_write(state, pad, PMIC_GPIO_REG_MODE_CTL, val); if (ret < 0) return ret; } return ret; } static void pmic_gpio_config_dbg_show(struct pinctrl_dev *pctldev, struct seq_file *s, unsigned pin) { struct pmic_gpio_state *state = pinctrl_dev_get_drvdata(pctldev); struct pmic_gpio_pad *pad; int ret, val, function; 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", "open-source" }; static const char *const strengths[] = { "no", "high", "medium", "low" }; pad = pctldev->desc->pins[pin].drv_data; seq_printf(s, " gpio%-2d:", pin + PMIC_GPIO_PHYSICAL_OFFSET); val = pmic_gpio_read(state, pad, PMIC_GPIO_REG_EN_CTL); if (val < 0 || !(val >> PMIC_GPIO_REG_MASTER_EN_SHIFT)) { seq_puts(s, " ---"); } else { if (pad->input_enabled) { ret = pmic_gpio_read(state, pad, PMIC_MPP_REG_RT_STS); if (ret < 0) return; ret &= PMIC_MPP_REG_RT_STS_VAL_MASK; pad->out_value = ret; } /* * For the non-LV/MV subtypes only 2 special functions are * available, offsetting the dtest function values by 2. */ function = pad->function; if (!pad->lv_mv_type && pad->function >= PMIC_GPIO_FUNC_INDEX_FUNC3) function += PMIC_GPIO_FUNC_INDEX_DTEST1 - PMIC_GPIO_FUNC_INDEX_FUNC3; if (pad->analog_pass) seq_puts(s, " analog-pass"); else seq_printf(s, " %-4s", pad->output_enabled ? "out" : "in"); seq_printf(s, " %-7s", pmic_gpio_functions[function]); seq_printf(s, " vin-%d", pad->power_source); seq_printf(s, " %-27s", biases[pad->pullup]); seq_printf(s, " %-10s", buffer_types[pad->buffer_type]); seq_printf(s, " %-4s", pad->out_value ? "high" : "low"); seq_printf(s, " %-7s", strengths[pad->strength]); seq_printf(s, " atest-%d", pad->atest); seq_printf(s, " dtest-%d", pad->dtest_buffer); } } static const struct pinconf_ops pmic_gpio_pinconf_ops = { .is_generic = true, .pin_config_group_get = pmic_gpio_config_get, .pin_config_group_set = pmic_gpio_config_set, .pin_config_group_dbg_show = pmic_gpio_config_dbg_show, }; static int pmic_gpio_direction_input(struct gpio_chip *chip, unsigned pin) { struct pmic_gpio_state *state = gpiochip_get_data(chip); unsigned long config; config = pinconf_to_config_packed(PIN_CONFIG_INPUT_ENABLE, 1); return pmic_gpio_config_set(state->ctrl, pin, &config, 1); } static int pmic_gpio_direction_output(struct gpio_chip *chip, unsigned pin, int val) { struct pmic_gpio_state *state = gpiochip_get_data(chip); unsigned long config; config = pinconf_to_config_packed(PIN_CONFIG_OUTPUT, val); return pmic_gpio_config_set(state->ctrl, pin, &config, 1); } static int pmic_gpio_get(struct gpio_chip *chip, unsigned pin) { struct pmic_gpio_state *state = gpiochip_get_data(chip); struct pmic_gpio_pad *pad; int ret; pad = state->ctrl->desc->pins[pin].drv_data; if (!pad->is_enabled) return -EINVAL; if (pad->input_enabled) { ret = pmic_gpio_read(state, pad, PMIC_MPP_REG_RT_STS); if (ret < 0) return ret; pad->out_value = ret & PMIC_MPP_REG_RT_STS_VAL_MASK; } return !!pad->out_value; } static void pmic_gpio_set(struct gpio_chip *chip, unsigned pin, int value) { struct pmic_gpio_state *state = gpiochip_get_data(chip); unsigned long config; config = pinconf_to_config_packed(PIN_CONFIG_OUTPUT, value); pmic_gpio_config_set(state->ctrl, pin, &config, 1); } static int pmic_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] - PMIC_GPIO_PHYSICAL_OFFSET; } static int pmic_gpio_to_irq(struct gpio_chip *chip, unsigned pin) { struct pmic_gpio_state *state = gpiochip_get_data(chip); struct pmic_gpio_pad *pad; pad = state->ctrl->desc->pins[pin].drv_data; return pad->irq; } static void pmic_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip) { struct pmic_gpio_state *state = gpiochip_get_data(chip); unsigned i; for (i = 0; i < chip->ngpio; i++) { pmic_gpio_config_dbg_show(state->ctrl, s, i); seq_puts(s, "\n"); } } static const struct gpio_chip pmic_gpio_gpio_template = { .direction_input = pmic_gpio_direction_input, .direction_output = pmic_gpio_direction_output, .get = pmic_gpio_get, .set = pmic_gpio_set, .request = gpiochip_generic_request, .free = gpiochip_generic_free, .of_xlate = pmic_gpio_of_xlate, .to_irq = pmic_gpio_to_irq, .dbg_show = pmic_gpio_dbg_show, }; static int pmic_gpio_populate(struct pmic_gpio_state *state, struct pmic_gpio_pad *pad) { int type, subtype, val, dir; type = pmic_gpio_read(state, pad, PMIC_GPIO_REG_TYPE); if (type < 0) return type; if (type != PMIC_GPIO_TYPE) { dev_err(state->dev, "incorrect block type 0x%x at 0x%x\n", type, pad->base); return -ENODEV; } subtype = pmic_gpio_read(state, pad, PMIC_GPIO_REG_SUBTYPE); if (subtype < 0) return subtype; switch (subtype) { case PMIC_GPIO_SUBTYPE_GPIO_4CH: pad->have_buffer = true; case PMIC_GPIO_SUBTYPE_GPIOC_4CH: pad->num_sources = 4; break; case PMIC_GPIO_SUBTYPE_GPIO_8CH: pad->have_buffer = true; case PMIC_GPIO_SUBTYPE_GPIOC_8CH: pad->num_sources = 8; break; case PMIC_GPIO_SUBTYPE_GPIO_LV: pad->num_sources = 1; pad->have_buffer = true; pad->lv_mv_type = true; break; case PMIC_GPIO_SUBTYPE_GPIO_MV: pad->num_sources = 2; pad->have_buffer = true; pad->lv_mv_type = true; break; default: dev_err(state->dev, "unknown GPIO type 0x%x\n", subtype); return -ENODEV; } if (pad->lv_mv_type) { val = pmic_gpio_read(state, pad, PMIC_GPIO_REG_LV_MV_DIG_OUT_SOURCE_CTL); if (val < 0) return val; pad->out_value = !!(val & PMIC_GPIO_LV_MV_OUTPUT_INVERT); pad->function = val & PMIC_GPIO_LV_MV_OUTPUT_SOURCE_SEL_MASK; val = pmic_gpio_read(state, pad, PMIC_GPIO_REG_MODE_CTL); if (val < 0) return val; dir = val & PMIC_GPIO_REG_LV_MV_MODE_DIR_MASK; } else { val = pmic_gpio_read(state, pad, PMIC_GPIO_REG_MODE_CTL); if (val < 0) return val; pad->out_value = val & PMIC_GPIO_REG_MODE_VALUE_SHIFT; dir = val >> PMIC_GPIO_REG_MODE_DIR_SHIFT; dir &= PMIC_GPIO_REG_MODE_DIR_MASK; pad->function = val >> PMIC_GPIO_REG_MODE_FUNCTION_SHIFT; pad->function &= PMIC_GPIO_REG_MODE_FUNCTION_MASK; } switch (dir) { case PMIC_GPIO_MODE_DIGITAL_INPUT: pad->input_enabled = true; pad->output_enabled = false; break; case PMIC_GPIO_MODE_DIGITAL_OUTPUT: pad->input_enabled = false; pad->output_enabled = true; break; case PMIC_GPIO_MODE_DIGITAL_INPUT_OUTPUT: pad->input_enabled = true; pad->output_enabled = true; break; case PMIC_GPIO_MODE_ANALOG_PASS_THRU: if (!pad->lv_mv_type) return -ENODEV; pad->analog_pass = true; break; default: dev_err(state->dev, "unknown GPIO direction\n"); return -ENODEV; } val = pmic_gpio_read(state, pad, PMIC_GPIO_REG_DIG_VIN_CTL); if (val < 0) return val; pad->power_source = val >> PMIC_GPIO_REG_VIN_SHIFT; pad->power_source &= PMIC_GPIO_REG_VIN_MASK; val = pmic_gpio_read(state, pad, PMIC_GPIO_REG_DIG_PULL_CTL); if (val < 0) return val; pad->pullup = val >> PMIC_GPIO_REG_PULL_SHIFT; pad->pullup &= PMIC_GPIO_REG_PULL_MASK; val = pmic_gpio_read(state, pad, PMIC_GPIO_REG_DIG_IN_CTL); if (val < 0) return val; if (pad->lv_mv_type && (val & PMIC_GPIO_LV_MV_DIG_IN_DTEST_EN)) pad->dtest_buffer = (val & PMIC_GPIO_LV_MV_DIG_IN_DTEST_SEL_MASK) + 1; else if (!pad->lv_mv_type) pad->dtest_buffer = ffs(val); else pad->dtest_buffer = 0; val = pmic_gpio_read(state, pad, PMIC_GPIO_REG_DIG_OUT_CTL); if (val < 0) return val; pad->strength = val >> PMIC_GPIO_REG_OUT_STRENGTH_SHIFT; pad->strength &= PMIC_GPIO_REG_OUT_STRENGTH_MASK; pad->buffer_type = val >> PMIC_GPIO_REG_OUT_TYPE_SHIFT; pad->buffer_type &= PMIC_GPIO_REG_OUT_TYPE_MASK; if (pad->lv_mv_type) { val = pmic_gpio_read(state, pad, PMIC_GPIO_REG_LV_MV_ANA_PASS_THRU_SEL); if (val < 0) return val; pad->atest = (val & PMIC_GPIO_LV_MV_ANA_MUX_SEL_MASK) + 1; } /* Pin could be disabled with PIN_CONFIG_BIAS_HIGH_IMPEDANCE */ pad->is_enabled = true; return 0; } static int pmic_gpio_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct pinctrl_pin_desc *pindesc; struct pinctrl_desc *pctrldesc; struct pmic_gpio_pad *pad, *pads; struct pmic_gpio_state *state; int ret, npins, i; u32 reg; ret = of_property_read_u32(dev->of_node, "reg", ®); if (ret < 0) { dev_err(dev, "missing base address"); return ret; } npins = platform_irq_count(pdev); if (!npins) return -EINVAL; if (npins < 0) return npins; BUG_ON(npins > ARRAY_SIZE(pmic_gpio_groups)); state = devm_kzalloc(dev, sizeof(*state), GFP_KERNEL); if (!state) return -ENOMEM; platform_set_drvdata(pdev, state); state->dev = &pdev->dev; state->map = dev_get_regmap(dev->parent, NULL); pindesc = devm_kcalloc(dev, npins, sizeof(*pindesc), GFP_KERNEL); if (!pindesc) return -ENOMEM; pads = devm_kcalloc(dev, npins, sizeof(*pads), GFP_KERNEL); if (!pads) return -ENOMEM; pctrldesc = devm_kzalloc(dev, sizeof(*pctrldesc), GFP_KERNEL); if (!pctrldesc) return -ENOMEM; pctrldesc->pctlops = &pmic_gpio_pinctrl_ops; pctrldesc->pmxops = &pmic_gpio_pinmux_ops; pctrldesc->confops = &pmic_gpio_pinconf_ops; pctrldesc->owner = THIS_MODULE; pctrldesc->name = dev_name(dev); pctrldesc->pins = pindesc; pctrldesc->npins = npins; pctrldesc->num_custom_params = ARRAY_SIZE(pmic_gpio_bindings); pctrldesc->custom_params = pmic_gpio_bindings; #ifdef CONFIG_DEBUG_FS pctrldesc->custom_conf_items = pmic_conf_items; #endif for (i = 0; i < npins; i++, pindesc++) { pad = &pads[i]; pindesc->drv_data = pad; pindesc->number = i; pindesc->name = pmic_gpio_groups[i]; pad->irq = platform_get_irq(pdev, i); if (pad->irq < 0) return pad->irq; pad->base = reg + i * PMIC_GPIO_ADDRESS_RANGE; ret = pmic_gpio_populate(state, pad); if (ret < 0) return ret; } state->chip = pmic_gpio_gpio_template; state->chip.parent = dev; state->chip.base = -1; state->chip.ngpio = npins; state->chip.label = dev_name(dev); state->chip.of_gpio_n_cells = 2; state->chip.can_sleep = false; state->ctrl = devm_pinctrl_register(dev, pctrldesc, state); if (IS_ERR(state->ctrl)) return PTR_ERR(state->ctrl); ret = gpiochip_add_data(&state->chip, state); if (ret) { dev_err(state->dev, "can't add gpio chip\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(dev->of_node, "gpio-ranges")) { ret = gpiochip_add_pin_range(&state->chip, dev_name(dev), 0, 0, npins); if (ret) { dev_err(dev, "failed to add pin range\n"); goto err_range; } } return 0; err_range: gpiochip_remove(&state->chip); return ret; } static int pmic_gpio_remove(struct platform_device *pdev) { struct pmic_gpio_state *state = platform_get_drvdata(pdev); gpiochip_remove(&state->chip); return 0; } static const struct of_device_id pmic_gpio_of_match[] = { { .compatible = "qcom,pm8916-gpio" }, /* 4 GPIO's */ { .compatible = "qcom,pm8941-gpio" }, /* 36 GPIO's */ { .compatible = "qcom,pm8994-gpio" }, /* 22 GPIO's */ { .compatible = "qcom,pma8084-gpio" }, /* 22 GPIO's */ { .compatible = "qcom,spmi-gpio" }, /* Generic */ { }, }; MODULE_DEVICE_TABLE(of, pmic_gpio_of_match); static struct platform_driver pmic_gpio_driver = { .driver = { .name = "qcom-spmi-gpio", .of_match_table = pmic_gpio_of_match, }, .probe = pmic_gpio_probe, .remove = pmic_gpio_remove, }; module_platform_driver(pmic_gpio_driver); MODULE_AUTHOR("Ivan T. Ivanov "); MODULE_DESCRIPTION("Qualcomm SPMI PMIC GPIO pin control driver"); MODULE_ALIAS("platform:qcom-spmi-gpio"); MODULE_LICENSE("GPL v2");