Lines Matching refs:st
26 struct ad5592r_state *st = gpiochip_get_data(chip); in ad5592r_gpio_get() local
30 scoped_guard(mutex, &st->gpio_lock) { in ad5592r_gpio_get()
31 if (st->gpio_out & BIT(offset)) in ad5592r_gpio_get()
32 val = st->gpio_val; in ad5592r_gpio_get()
34 ret = st->ops->gpio_read(st, &val); in ad5592r_gpio_get()
46 struct ad5592r_state *st = gpiochip_get_data(chip); in ad5592r_gpio_set() local
48 guard(mutex)(&st->gpio_lock); in ad5592r_gpio_set()
51 st->gpio_val |= BIT(offset); in ad5592r_gpio_set()
53 st->gpio_val &= ~BIT(offset); in ad5592r_gpio_set()
55 return st->ops->reg_write(st, AD5592R_REG_GPIO_SET, st->gpio_val); in ad5592r_gpio_set()
60 struct ad5592r_state *st = gpiochip_get_data(chip); in ad5592r_gpio_direction_input() local
63 guard(mutex)(&st->gpio_lock); in ad5592r_gpio_direction_input()
65 st->gpio_out &= ~BIT(offset); in ad5592r_gpio_direction_input()
66 st->gpio_in |= BIT(offset); in ad5592r_gpio_direction_input()
68 ret = st->ops->reg_write(st, AD5592R_REG_GPIO_OUT_EN, st->gpio_out); in ad5592r_gpio_direction_input()
72 return st->ops->reg_write(st, AD5592R_REG_GPIO_IN_EN, st->gpio_in); in ad5592r_gpio_direction_input()
78 struct ad5592r_state *st = gpiochip_get_data(chip); in ad5592r_gpio_direction_output() local
81 guard(mutex)(&st->gpio_lock); in ad5592r_gpio_direction_output()
84 st->gpio_val |= BIT(offset); in ad5592r_gpio_direction_output()
86 st->gpio_val &= ~BIT(offset); in ad5592r_gpio_direction_output()
88 st->gpio_in &= ~BIT(offset); in ad5592r_gpio_direction_output()
89 st->gpio_out |= BIT(offset); in ad5592r_gpio_direction_output()
91 ret = st->ops->reg_write(st, AD5592R_REG_GPIO_SET, st->gpio_val); in ad5592r_gpio_direction_output()
95 ret = st->ops->reg_write(st, AD5592R_REG_GPIO_OUT_EN, st->gpio_out); in ad5592r_gpio_direction_output()
99 return st->ops->reg_write(st, AD5592R_REG_GPIO_IN_EN, st->gpio_in); in ad5592r_gpio_direction_output()
104 struct ad5592r_state *st = gpiochip_get_data(chip); in ad5592r_gpio_request() local
106 if (!(st->gpio_map & BIT(offset))) { in ad5592r_gpio_request()
107 dev_err(st->dev, "GPIO %d is reserved by alternate function\n", in ad5592r_gpio_request()
119 static int ad5592r_gpio_init(struct ad5592r_state *st) in ad5592r_gpio_init() argument
121 if (!st->gpio_map) in ad5592r_gpio_init()
124 st->gpiochip.label = dev_name(st->dev); in ad5592r_gpio_init()
125 st->gpiochip.base = -1; in ad5592r_gpio_init()
126 st->gpiochip.ngpio = 8; in ad5592r_gpio_init()
127 st->gpiochip.parent = st->dev; in ad5592r_gpio_init()
128 st->gpiochip.can_sleep = true; in ad5592r_gpio_init()
129 st->gpiochip.direction_input = ad5592r_gpio_direction_input; in ad5592r_gpio_init()
130 st->gpiochip.direction_output = ad5592r_gpio_direction_output; in ad5592r_gpio_init()
131 st->gpiochip.get = ad5592r_gpio_get; in ad5592r_gpio_init()
132 st->gpiochip.set_rv = ad5592r_gpio_set; in ad5592r_gpio_init()
133 st->gpiochip.request = ad5592r_gpio_request; in ad5592r_gpio_init()
134 st->gpiochip.owner = THIS_MODULE; in ad5592r_gpio_init()
135 st->gpiochip.names = ad5592r_gpio_names; in ad5592r_gpio_init()
137 mutex_init(&st->gpio_lock); in ad5592r_gpio_init()
139 return gpiochip_add_data(&st->gpiochip, st); in ad5592r_gpio_init()
142 static void ad5592r_gpio_cleanup(struct ad5592r_state *st) in ad5592r_gpio_cleanup() argument
144 if (st->gpio_map) in ad5592r_gpio_cleanup()
145 gpiochip_remove(&st->gpiochip); in ad5592r_gpio_cleanup()
147 mutex_destroy(&st->gpio_lock); in ad5592r_gpio_cleanup()
150 static int ad5592r_reset(struct ad5592r_state *st) in ad5592r_reset() argument
154 gpio = devm_gpiod_get_optional(st->dev, "reset", GPIOD_OUT_LOW); in ad5592r_reset()
162 scoped_guard(mutex, &st->lock) in ad5592r_reset()
164 st->ops->reg_write(st, AD5592R_REG_RESET, 0xdac); in ad5592r_reset()
172 static int ad5592r_get_vref(struct ad5592r_state *st) in ad5592r_get_vref() argument
176 if (st->reg) { in ad5592r_get_vref()
177 ret = regulator_get_voltage(st->reg); in ad5592r_get_vref()
187 static int ad5592r_set_channel_modes(struct ad5592r_state *st) in ad5592r_set_channel_modes() argument
189 const struct ad5592r_rw_ops *ops = st->ops; in ad5592r_set_channel_modes()
195 for (i = 0; i < st->num_channels; i++) { in ad5592r_set_channel_modes()
196 switch (st->channel_modes[i]) { in ad5592r_set_channel_modes()
211 st->gpio_map |= BIT(i); in ad5592r_set_channel_modes()
212 st->gpio_in |= BIT(i); /* Default to input */ in ad5592r_set_channel_modes()
217 switch (st->channel_offstate[i]) { in ad5592r_set_channel_modes()
223 st->gpio_out |= BIT(i); in ad5592r_set_channel_modes()
227 st->gpio_out |= BIT(i); in ad5592r_set_channel_modes()
228 st->gpio_val |= BIT(i); in ad5592r_set_channel_modes()
239 guard(mutex)(&st->lock); in ad5592r_set_channel_modes()
242 ret = ops->reg_write(st, AD5592R_REG_PULLDOWN, pulldown); in ad5592r_set_channel_modes()
246 ret = ops->reg_write(st, AD5592R_REG_TRISTATE, tristate); in ad5592r_set_channel_modes()
251 ret = ops->reg_write(st, AD5592R_REG_DAC_EN, dac); in ad5592r_set_channel_modes()
255 ret = ops->reg_write(st, AD5592R_REG_ADC_EN, adc); in ad5592r_set_channel_modes()
259 ret = ops->reg_write(st, AD5592R_REG_GPIO_SET, st->gpio_val); in ad5592r_set_channel_modes()
263 ret = ops->reg_write(st, AD5592R_REG_GPIO_OUT_EN, st->gpio_out); in ad5592r_set_channel_modes()
267 ret = ops->reg_write(st, AD5592R_REG_GPIO_IN_EN, st->gpio_in); in ad5592r_set_channel_modes()
272 ret = ops->reg_read(st, AD5592R_REG_ADC_EN, &read_back); in ad5592r_set_channel_modes()
279 static int ad5592r_reset_channel_modes(struct ad5592r_state *st) in ad5592r_reset_channel_modes() argument
283 for (i = 0; i < ARRAY_SIZE(st->channel_modes); i++) in ad5592r_reset_channel_modes()
284 st->channel_modes[i] = CH_MODE_UNUSED; in ad5592r_reset_channel_modes()
286 return ad5592r_set_channel_modes(st); in ad5592r_reset_channel_modes()
292 struct ad5592r_state *st = iio_priv(iio_dev); in ad5592r_write_raw() local
304 scoped_guard(mutex, &st->lock) { in ad5592r_write_raw()
305 ret = st->ops->write_dac(st, chan->channel, val); in ad5592r_write_raw()
307 st->cached_dac[chan->channel] = val; in ad5592r_write_raw()
314 if (val == st->scale_avail[0][0] && in ad5592r_write_raw()
315 val2 == st->scale_avail[0][1]) in ad5592r_write_raw()
317 else if (val == st->scale_avail[1][0] && in ad5592r_write_raw()
318 val2 == st->scale_avail[1][1]) in ad5592r_write_raw()
323 guard(mutex)(&st->lock); in ad5592r_write_raw()
325 ret = st->ops->reg_read(st, AD5592R_REG_CTRL, in ad5592r_write_raw()
326 &st->cached_gp_ctrl); in ad5592r_write_raw()
332 st->cached_gp_ctrl |= in ad5592r_write_raw()
335 st->cached_gp_ctrl &= in ad5592r_write_raw()
339 st->cached_gp_ctrl |= in ad5592r_write_raw()
342 st->cached_gp_ctrl &= in ad5592r_write_raw()
346 return st->ops->reg_write(st, AD5592R_REG_CTRL, in ad5592r_write_raw()
347 st->cached_gp_ctrl); in ad5592r_write_raw()
361 struct ad5592r_state *st = iio_priv(iio_dev); in ad5592r_read_raw() local
368 scoped_guard(mutex, &st->lock) in ad5592r_read_raw()
369 ret = st->ops->read_adc(st, chan->channel, in ad5592r_read_raw()
375 dev_err(st->dev, "Error while reading channel %u\n", in ad5592r_read_raw()
383 scoped_guard(mutex, &st->lock) in ad5592r_read_raw()
384 read_val = st->cached_dac[chan->channel]; in ad5592r_read_raw()
387 dev_dbg(st->dev, "Channel %u read: 0x%04hX\n", in ad5592r_read_raw()
393 *val = ad5592r_get_vref(st); in ad5592r_read_raw()
402 scoped_guard(mutex, &st->lock) { in ad5592r_read_raw()
404 mult = !!(st->cached_gp_ctrl & in ad5592r_read_raw()
407 mult = !!(st->cached_gp_ctrl & in ad5592r_read_raw()
417 ret = ad5592r_get_vref(st); in ad5592r_read_raw()
419 guard(mutex)(&st->lock); in ad5592r_read_raw()
421 if (st->cached_gp_ctrl & AD5592R_REG_CTRL_ADC_RANGE) in ad5592r_read_raw()
458 struct ad5592r_state *st = iio_priv(iio_dev); in ad5592r_show_scale_available() local
461 st->scale_avail[0][0], st->scale_avail[0][1], in ad5592r_show_scale_available()
462 st->scale_avail[1][0], st->scale_avail[1][1]); in ad5592r_show_scale_available()
491 struct ad5592r_state *st = iio_priv(iio_dev); in ad5592r_alloc_channels() local
493 num_channels = st->num_channels; in ad5592r_alloc_channels()
499 device_for_each_child_node(st->dev, child) { in ad5592r_alloc_channels()
501 if (ret || reg >= ARRAY_SIZE(st->channel_modes)) in ad5592r_alloc_channels()
506 st->channel_modes[reg] = tmp; in ad5592r_alloc_channels()
510 st->channel_offstate[reg] = tmp; in ad5592r_alloc_channels()
513 channels = devm_kcalloc(st->dev, in ad5592r_alloc_channels()
520 switch (st->channel_modes[i]) { in ad5592r_alloc_channels()
560 static void ad5592r_init_scales(struct ad5592r_state *st, int vref_mV) in ad5592r_init_scales() argument
564 st->scale_avail[0][0] = in ad5592r_init_scales()
565 div_s64_rem(tmp, 1000000000LL, &st->scale_avail[0][1]); in ad5592r_init_scales()
566 st->scale_avail[1][0] = in ad5592r_init_scales()
567 div_s64_rem(tmp * 2, 1000000000LL, &st->scale_avail[1][1]); in ad5592r_init_scales()
574 struct ad5592r_state *st; in ad5592r_probe() local
577 iio_dev = devm_iio_device_alloc(dev, sizeof(*st)); in ad5592r_probe()
581 st = iio_priv(iio_dev); in ad5592r_probe()
582 st->dev = dev; in ad5592r_probe()
583 st->ops = ops; in ad5592r_probe()
584 st->num_channels = 8; in ad5592r_probe()
587 ret = devm_mutex_init(dev, &st->lock); in ad5592r_probe()
591 st->reg = devm_regulator_get_optional(dev, "vref"); in ad5592r_probe()
592 if (IS_ERR(st->reg)) { in ad5592r_probe()
593 if ((PTR_ERR(st->reg) != -ENODEV) && dev_fwnode(dev)) in ad5592r_probe()
594 return PTR_ERR(st->reg); in ad5592r_probe()
596 st->reg = NULL; in ad5592r_probe()
598 ret = regulator_enable(st->reg); in ad5592r_probe()
607 ad5592r_init_scales(st, ad5592r_get_vref(st)); in ad5592r_probe()
609 ret = ad5592r_reset(st); in ad5592r_probe()
613 ret = ops->reg_write(st, AD5592R_REG_PD, in ad5592r_probe()
614 (st->reg == NULL) ? AD5592R_REG_PD_EN_REF : 0); in ad5592r_probe()
622 ret = ad5592r_set_channel_modes(st); in ad5592r_probe()
630 ret = ad5592r_gpio_init(st); in ad5592r_probe()
640 ad5592r_reset_channel_modes(st); in ad5592r_probe()
643 if (st->reg) in ad5592r_probe()
644 regulator_disable(st->reg); in ad5592r_probe()
653 struct ad5592r_state *st = iio_priv(iio_dev); in ad5592r_remove() local
656 ad5592r_reset_channel_modes(st); in ad5592r_remove()
657 ad5592r_gpio_cleanup(st); in ad5592r_remove()
659 if (st->reg) in ad5592r_remove()
660 regulator_disable(st->reg); in ad5592r_remove()