1 // SPDX-License-Identifier: GPL-2.0+
3 * Qualcomm generic pmic gpio driver
9 #include <dm/device-internal.h>
11 #include <dm/pinctrl.h>
13 #include <power/pmic.h>
14 #include <spmi/spmi.h>
18 #include <linux/bitops.h>
20 /* Register offset for each gpio */
21 #define REG_OFFSET(x) ((x) * 0x100)
25 /* Type and subtype are shared for all PMIC peripherals */
27 #define REG_SUBTYPE 0x5
29 /* GPIO peripheral type and subtype out_values */
30 #define REG_TYPE_VAL 0x10
31 #define REG_SUBTYPE_GPIO_4CH 0x1
32 #define REG_SUBTYPE_GPIOC_4CH 0x5
33 #define REG_SUBTYPE_GPIO_8CH 0x9
34 #define REG_SUBTYPE_GPIOC_8CH 0xd
35 #define REG_SUBTYPE_GPIO_LV 0x10
36 #define REG_SUBTYPE_GPIO_MV 0x11
37 #define REG_SUBTYPE_GPIO_LV_VIN2 0x12
38 #define REG_SUBTYPE_GPIO_MV_VIN3 0x13
40 #define REG_STATUS 0x08
41 #define REG_STATUS_VAL_MASK 0x1
45 #define REG_CTL_MODE_MASK 0x70
46 #define REG_CTL_MODE_INPUT 0x00
47 #define REG_CTL_MODE_INOUT 0x20
48 #define REG_CTL_MODE_OUTPUT 0x10
49 #define REG_CTL_OUTPUT_MASK 0x0F
50 #define REG_CTL_LV_MV_MODE_MASK 0x3
51 #define REG_CTL_LV_MV_MODE_INPUT 0x0
52 #define REG_CTL_LV_MV_MODE_INOUT 0x2
53 #define REG_CTL_LV_MV_MODE_OUTPUT 0x1
55 #define REG_DIG_VIN_CTL 0x41
56 #define REG_DIG_VIN_VIN0 0
58 #define REG_DIG_PULL_CTL 0x42
59 #define REG_DIG_PULL_NO_PU 0x5
61 #define REG_LV_MV_OUTPUT_CTL 0x44
62 #define REG_LV_MV_OUTPUT_CTL_MASK 0x80
63 #define REG_LV_MV_OUTPUT_CTL_SHIFT 7
65 #define REG_DIG_OUT_CTL 0x45
66 #define REG_DIG_OUT_CTL_CMOS (0x0 << 4)
67 #define REG_DIG_OUT_CTL_DRIVE_L 0x1
69 #define REG_EN_CTL 0x46
70 #define REG_EN_CTL_ENABLE (1 << 7)
73 * pmic_gpio_match_data - platform specific configuration
75 * @PMIC_MATCH_READONLY: treat all GPIOs as readonly, don't attempt to configure them.
76 * This is a workaround for an unknown bug on some platforms where trying to write the
77 * GPIO configuration registers causes the board to hang.
79 enum pmic_gpio_quirks {
80 QCOM_PMIC_QUIRK_READONLY = (1 << 0),
83 struct qcom_pmic_gpio_data {
84 uint32_t pid; /* Peripheral ID on SPMI bus */
85 bool lv_mv_type; /* If subtype is GPIO_LV(0x10) or GPIO_MV(0x11) */
87 struct udevice *pmic; /* Reference to pmic device for read/write */
90 /* dev can be the GPIO or pinctrl device */
91 static int _qcom_gpio_set_direction(struct udevice *dev, u32 offset, bool input, int value)
93 struct qcom_pmic_gpio_data *plat = dev_get_plat(dev);
94 u32 gpio_base = plat->pid + REG_OFFSET(offset);
98 /* Select the mode and output */
99 if (plat->lv_mv_type) {
101 reg_ctl_val = REG_CTL_LV_MV_MODE_INPUT;
103 reg_ctl_val = REG_CTL_LV_MV_MODE_INOUT;
106 reg_ctl_val = REG_CTL_MODE_INPUT;
108 reg_ctl_val = REG_CTL_MODE_INOUT | !!value;
111 ret = pmic_reg_write(plat->pmic, gpio_base + REG_CTL, reg_ctl_val);
115 if (plat->lv_mv_type && !input) {
116 ret = pmic_reg_write(plat->pmic,
117 gpio_base + REG_LV_MV_OUTPUT_CTL,
118 !!value << REG_LV_MV_OUTPUT_CTL_SHIFT);
126 static int qcom_gpio_set_direction(struct udevice *dev, unsigned int offset,
127 bool input, int value)
129 struct qcom_pmic_gpio_data *plat = dev_get_plat(dev);
130 uint32_t gpio_base = plat->pid + REG_OFFSET(offset);
131 ulong quirks = dev_get_driver_data(dev);
134 /* Some PMICs don't like their GPIOs being configured */
135 if (quirks & QCOM_PMIC_QUIRK_READONLY)
138 /* Disable the GPIO */
139 ret = pmic_clrsetbits(dev->parent, gpio_base + REG_EN_CTL,
140 REG_EN_CTL_ENABLE, 0);
144 _qcom_gpio_set_direction(dev, offset, input, value);
146 /* Set the right pull (no pull) */
147 ret = pmic_reg_write(plat->pmic, gpio_base + REG_DIG_PULL_CTL,
152 /* Configure output pin drivers if needed */
154 /* Select the VIN - VIN0, pin is input so it doesn't matter */
155 ret = pmic_reg_write(plat->pmic, gpio_base + REG_DIG_VIN_CTL,
160 /* Set the right dig out control */
161 ret = pmic_reg_write(plat->pmic, gpio_base + REG_DIG_OUT_CTL,
162 REG_DIG_OUT_CTL_CMOS |
163 REG_DIG_OUT_CTL_DRIVE_L);
168 /* Enable the GPIO */
169 return pmic_clrsetbits(dev->parent, gpio_base + REG_EN_CTL, 0,
173 static int qcom_gpio_direction_input(struct udevice *dev, unsigned offset)
175 return qcom_gpio_set_direction(dev, offset, true, 0);
178 static int qcom_gpio_direction_output(struct udevice *dev, unsigned offset,
181 return qcom_gpio_set_direction(dev, offset, false, value);
184 static int qcom_gpio_get_function(struct udevice *dev, unsigned offset)
186 struct qcom_pmic_gpio_data *plat = dev_get_plat(dev);
187 uint32_t gpio_base = plat->pid + REG_OFFSET(offset);
190 reg = pmic_reg_read(plat->pmic, gpio_base + REG_CTL);
194 if (plat->lv_mv_type) {
195 switch (reg & REG_CTL_LV_MV_MODE_MASK) {
196 case REG_CTL_LV_MV_MODE_INPUT:
198 case REG_CTL_LV_MV_MODE_INOUT: /* Fallthrough */
199 case REG_CTL_LV_MV_MODE_OUTPUT:
202 return GPIOF_UNKNOWN;
205 switch (reg & REG_CTL_MODE_MASK) {
206 case REG_CTL_MODE_INPUT:
208 case REG_CTL_MODE_INOUT: /* Fallthrough */
209 case REG_CTL_MODE_OUTPUT:
212 return GPIOF_UNKNOWN;
217 static int qcom_gpio_get_value(struct udevice *dev, unsigned offset)
219 struct qcom_pmic_gpio_data *plat = dev_get_plat(dev);
220 uint32_t gpio_base = plat->pid + REG_OFFSET(offset);
223 reg = pmic_reg_read(plat->pmic, gpio_base + REG_STATUS);
227 return !!(reg & REG_STATUS_VAL_MASK);
230 static int qcom_gpio_set_value(struct udevice *dev, unsigned offset,
233 struct qcom_pmic_gpio_data *plat = dev_get_plat(dev);
234 uint32_t gpio_base = plat->pid + REG_OFFSET(offset);
236 /* Set the output value of the gpio */
237 if (plat->lv_mv_type)
238 return pmic_clrsetbits(dev->parent,
239 gpio_base + REG_LV_MV_OUTPUT_CTL,
240 REG_LV_MV_OUTPUT_CTL_MASK,
241 !!value << REG_LV_MV_OUTPUT_CTL_SHIFT);
243 return pmic_clrsetbits(dev->parent, gpio_base + REG_CTL,
244 REG_CTL_OUTPUT_MASK, !!value);
247 static int qcom_gpio_xlate(struct udevice *dev, struct gpio_desc *desc,
248 struct ofnode_phandle_args *args)
250 struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
252 if (args->args_count < 1)
255 /* GPIOs in DT are 1-based */
256 desc->offset = args->args[0] - 1;
257 if (desc->offset >= uc_priv->gpio_count)
260 if (args->args_count < 2)
263 desc->flags = gpio_flags_xlate(args->args[1]);
268 static const struct dm_gpio_ops qcom_gpio_ops = {
269 .direction_input = qcom_gpio_direction_input,
270 .direction_output = qcom_gpio_direction_output,
271 .get_value = qcom_gpio_get_value,
272 .set_value = qcom_gpio_set_value,
273 .get_function = qcom_gpio_get_function,
274 .xlate = qcom_gpio_xlate,
277 static int qcom_gpio_bind(struct udevice *dev)
280 struct qcom_pmic_gpio_data *plat = dev_get_plat(dev);
281 ulong quirks = dev_get_driver_data(dev);
282 struct udevice *child;
286 drv = lists_driver_lookup_name("qcom_pmic_pinctrl");
288 log_warning("Cannot find driver '%s'\n", "qcom_pmic_pinctrl");
292 /* Bind the GPIO driver as a child of the PMIC. */
293 ret = device_bind_with_driver_data(dev, drv,
295 quirks, dev_ofnode(dev), &child);
297 return log_msg_ret("bind", ret);
299 dev_set_plat(child, plat);
304 static int qcom_gpio_probe(struct udevice *dev)
306 struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
307 struct qcom_pmic_gpio_data *plat = dev_get_plat(dev);
308 struct ofnode_phandle_args args;
312 plat->pmic = dev->parent;
314 pid = dev_read_addr(dev);
315 if (pid == FDT_ADDR_T_NONE)
316 return log_msg_ret("bad address", -EINVAL);
320 /* Do a sanity check */
321 val = pmic_reg_read(plat->pmic, plat->pid + REG_TYPE);
322 if (val != REG_TYPE_VAL)
323 return log_msg_ret("bad type", -ENXIO);
325 val = pmic_reg_read(plat->pmic, plat->pid + REG_SUBTYPE);
327 case REG_SUBTYPE_GPIO_4CH:
328 case REG_SUBTYPE_GPIOC_4CH:
329 plat->lv_mv_type = false;
331 case REG_SUBTYPE_GPIO_LV:
332 case REG_SUBTYPE_GPIO_MV:
333 case REG_SUBTYPE_GPIO_LV_VIN2:
334 case REG_SUBTYPE_GPIO_MV_VIN3:
335 plat->lv_mv_type = true;
338 return log_msg_ret("bad subtype", -ENXIO);
341 plat->lv_mv_type = val == REG_SUBTYPE_GPIO_LV ||
342 val == REG_SUBTYPE_GPIO_MV;
345 * Parse basic GPIO count specified via the gpio-ranges property
346 * as specified in upstream devicetrees
348 ret = ofnode_parse_phandle_with_args(dev_ofnode(dev), "gpio-ranges",
351 return log_msg_ret("gpio-ranges", ret);
353 plat->pin_count = args.args[2];
355 uc_priv->gpio_count = plat->pin_count;
356 uc_priv->bank_name = "pmic";
361 static const struct udevice_id qcom_gpio_ids[] = {
362 { .compatible = "qcom,pm8916-gpio" },
363 { .compatible = "qcom,pm8994-gpio" }, /* 22 GPIO's */
364 { .compatible = "qcom,pm8998-gpio", .data = QCOM_PMIC_QUIRK_READONLY },
365 { .compatible = "qcom,pms405-gpio" },
366 { .compatible = "qcom,pm6125-gpio", .data = QCOM_PMIC_QUIRK_READONLY },
367 { .compatible = "qcom,pm8150-gpio", .data = QCOM_PMIC_QUIRK_READONLY },
368 { .compatible = "qcom,pm8550-gpio", .data = QCOM_PMIC_QUIRK_READONLY },
372 U_BOOT_DRIVER(qcom_pmic_gpio) = {
373 .name = "qcom_pmic_gpio",
375 .of_match = qcom_gpio_ids,
376 .bind = qcom_gpio_bind,
377 .probe = qcom_gpio_probe,
378 .ops = &qcom_gpio_ops,
379 .plat_auto = sizeof(struct qcom_pmic_gpio_data),
380 .flags = DM_FLAG_ALLOC_PDATA,
383 static const struct pinconf_param qcom_pmic_pinctrl_conf_params[] = {
384 { "output-high", PIN_CONFIG_OUTPUT_ENABLE, 1 },
385 { "output-low", PIN_CONFIG_OUTPUT, 0 },
388 static int qcom_pmic_pinctrl_get_pins_count(struct udevice *dev)
390 struct qcom_pmic_gpio_data *plat = dev_get_plat(dev);
392 return plat->pin_count;
395 static const char *qcom_pmic_pinctrl_get_pin_name(struct udevice *dev, unsigned int selector)
399 /* DT indexes from 1 */
400 snprintf(name, sizeof(name), "gpio%u", selector + 1);
405 static int qcom_pmic_pinctrl_pinconf_set(struct udevice *dev, unsigned int selector,
406 unsigned int param, unsigned int arg)
408 /* We only support configuring the pin as an output, either low or high */
409 return _qcom_gpio_set_direction(dev, selector, false,
410 param == PIN_CONFIG_OUTPUT_ENABLE);
413 static const char *qcom_pmic_pinctrl_get_function_name(struct udevice *dev, unsigned int selector)
420 static int qcom_pmic_pinctrl_generic_get_functions_count(struct udevice *dev)
425 static int qcom_pmic_pinctrl_generic_pinmux_set_mux(struct udevice *dev, unsigned int selector,
426 unsigned int func_selector)
431 struct pinctrl_ops qcom_pmic_pinctrl_ops = {
432 .get_pins_count = qcom_pmic_pinctrl_get_pins_count,
433 .get_pin_name = qcom_pmic_pinctrl_get_pin_name,
434 .set_state = pinctrl_generic_set_state,
435 .pinconf_num_params = ARRAY_SIZE(qcom_pmic_pinctrl_conf_params),
436 .pinconf_params = qcom_pmic_pinctrl_conf_params,
437 .pinconf_set = qcom_pmic_pinctrl_pinconf_set,
438 .get_function_name = qcom_pmic_pinctrl_get_function_name,
439 .get_functions_count = qcom_pmic_pinctrl_generic_get_functions_count,
440 .pinmux_set = qcom_pmic_pinctrl_generic_pinmux_set_mux,
443 U_BOOT_DRIVER(qcom_pmic_pinctrl) = {
444 .name = "qcom_pmic_pinctrl",
445 .id = UCLASS_PINCTRL,
446 .ops = &qcom_pmic_pinctrl_ops,