Lines Matching refs:st
28 struct ad5592r_state *st = gpiochip_get_data(chip); in ad5592r_gpio_get() local
32 mutex_lock(&st->gpio_lock); in ad5592r_gpio_get()
34 if (st->gpio_out & BIT(offset)) in ad5592r_gpio_get()
35 val = st->gpio_val; in ad5592r_gpio_get()
37 ret = st->ops->gpio_read(st, &val); in ad5592r_gpio_get()
39 mutex_unlock(&st->gpio_lock); in ad5592r_gpio_get()
49 struct ad5592r_state *st = gpiochip_get_data(chip); in ad5592r_gpio_set() local
51 mutex_lock(&st->gpio_lock); in ad5592r_gpio_set()
54 st->gpio_val |= BIT(offset); in ad5592r_gpio_set()
56 st->gpio_val &= ~BIT(offset); in ad5592r_gpio_set()
58 st->ops->reg_write(st, AD5592R_REG_GPIO_SET, st->gpio_val); in ad5592r_gpio_set()
60 mutex_unlock(&st->gpio_lock); in ad5592r_gpio_set()
65 struct ad5592r_state *st = gpiochip_get_data(chip); in ad5592r_gpio_direction_input() local
68 mutex_lock(&st->gpio_lock); in ad5592r_gpio_direction_input()
70 st->gpio_out &= ~BIT(offset); in ad5592r_gpio_direction_input()
71 st->gpio_in |= BIT(offset); in ad5592r_gpio_direction_input()
73 ret = st->ops->reg_write(st, AD5592R_REG_GPIO_OUT_EN, st->gpio_out); in ad5592r_gpio_direction_input()
77 ret = st->ops->reg_write(st, AD5592R_REG_GPIO_IN_EN, st->gpio_in); in ad5592r_gpio_direction_input()
80 mutex_unlock(&st->gpio_lock); in ad5592r_gpio_direction_input()
88 struct ad5592r_state *st = gpiochip_get_data(chip); in ad5592r_gpio_direction_output() local
91 mutex_lock(&st->gpio_lock); in ad5592r_gpio_direction_output()
94 st->gpio_val |= BIT(offset); in ad5592r_gpio_direction_output()
96 st->gpio_val &= ~BIT(offset); in ad5592r_gpio_direction_output()
98 st->gpio_in &= ~BIT(offset); in ad5592r_gpio_direction_output()
99 st->gpio_out |= BIT(offset); in ad5592r_gpio_direction_output()
101 ret = st->ops->reg_write(st, AD5592R_REG_GPIO_SET, st->gpio_val); in ad5592r_gpio_direction_output()
105 ret = st->ops->reg_write(st, AD5592R_REG_GPIO_OUT_EN, st->gpio_out); in ad5592r_gpio_direction_output()
109 ret = st->ops->reg_write(st, AD5592R_REG_GPIO_IN_EN, st->gpio_in); in ad5592r_gpio_direction_output()
112 mutex_unlock(&st->gpio_lock); in ad5592r_gpio_direction_output()
119 struct ad5592r_state *st = gpiochip_get_data(chip); in ad5592r_gpio_request() local
121 if (!(st->gpio_map & BIT(offset))) { in ad5592r_gpio_request()
122 dev_err(st->dev, "GPIO %d is reserved by alternate function\n", in ad5592r_gpio_request()
130 static int ad5592r_gpio_init(struct ad5592r_state *st) in ad5592r_gpio_init() argument
132 if (!st->gpio_map) in ad5592r_gpio_init()
135 st->gpiochip.label = dev_name(st->dev); in ad5592r_gpio_init()
136 st->gpiochip.base = -1; in ad5592r_gpio_init()
137 st->gpiochip.ngpio = 8; in ad5592r_gpio_init()
138 st->gpiochip.parent = st->dev; in ad5592r_gpio_init()
139 st->gpiochip.can_sleep = true; in ad5592r_gpio_init()
140 st->gpiochip.direction_input = ad5592r_gpio_direction_input; in ad5592r_gpio_init()
141 st->gpiochip.direction_output = ad5592r_gpio_direction_output; in ad5592r_gpio_init()
142 st->gpiochip.get = ad5592r_gpio_get; in ad5592r_gpio_init()
143 st->gpiochip.set = ad5592r_gpio_set; in ad5592r_gpio_init()
144 st->gpiochip.request = ad5592r_gpio_request; in ad5592r_gpio_init()
145 st->gpiochip.owner = THIS_MODULE; in ad5592r_gpio_init()
147 mutex_init(&st->gpio_lock); in ad5592r_gpio_init()
149 return gpiochip_add_data(&st->gpiochip, st); in ad5592r_gpio_init()
152 static void ad5592r_gpio_cleanup(struct ad5592r_state *st) in ad5592r_gpio_cleanup() argument
154 if (st->gpio_map) in ad5592r_gpio_cleanup()
155 gpiochip_remove(&st->gpiochip); in ad5592r_gpio_cleanup()
158 static int ad5592r_reset(struct ad5592r_state *st) in ad5592r_reset() argument
161 struct iio_dev *iio_dev = iio_priv_to_dev(st); in ad5592r_reset()
163 gpio = devm_gpiod_get_optional(st->dev, "reset", GPIOD_OUT_LOW); in ad5592r_reset()
173 st->ops->reg_write(st, AD5592R_REG_RESET, 0xdac); in ad5592r_reset()
182 static int ad5592r_get_vref(struct ad5592r_state *st) in ad5592r_get_vref() argument
186 if (st->reg) { in ad5592r_get_vref()
187 ret = regulator_get_voltage(st->reg); in ad5592r_get_vref()
197 static int ad5592r_set_channel_modes(struct ad5592r_state *st) in ad5592r_set_channel_modes() argument
199 const struct ad5592r_rw_ops *ops = st->ops; in ad5592r_set_channel_modes()
202 struct iio_dev *iio_dev = iio_priv_to_dev(st); in ad5592r_set_channel_modes()
206 for (i = 0; i < st->num_channels; i++) { in ad5592r_set_channel_modes()
207 switch (st->channel_modes[i]) { in ad5592r_set_channel_modes()
222 st->gpio_map |= BIT(i); in ad5592r_set_channel_modes()
223 st->gpio_in |= BIT(i); /* Default to input */ in ad5592r_set_channel_modes()
229 switch (st->channel_offstate[i]) { in ad5592r_set_channel_modes()
235 st->gpio_out |= BIT(i); in ad5592r_set_channel_modes()
239 st->gpio_out |= BIT(i); in ad5592r_set_channel_modes()
240 st->gpio_val |= BIT(i); in ad5592r_set_channel_modes()
255 ret = ops->reg_write(st, AD5592R_REG_PULLDOWN, pulldown); in ad5592r_set_channel_modes()
259 ret = ops->reg_write(st, AD5592R_REG_TRISTATE, tristate); in ad5592r_set_channel_modes()
264 ret = ops->reg_write(st, AD5592R_REG_DAC_EN, dac); in ad5592r_set_channel_modes()
268 ret = ops->reg_write(st, AD5592R_REG_ADC_EN, adc); in ad5592r_set_channel_modes()
272 ret = ops->reg_write(st, AD5592R_REG_GPIO_SET, st->gpio_val); in ad5592r_set_channel_modes()
276 ret = ops->reg_write(st, AD5592R_REG_GPIO_OUT_EN, st->gpio_out); in ad5592r_set_channel_modes()
280 ret = ops->reg_write(st, AD5592R_REG_GPIO_IN_EN, st->gpio_in); in ad5592r_set_channel_modes()
285 ret = ops->reg_read(st, AD5592R_REG_ADC_EN, &read_back); in ad5592r_set_channel_modes()
294 static int ad5592r_reset_channel_modes(struct ad5592r_state *st) in ad5592r_reset_channel_modes() argument
298 for (i = 0; i < ARRAY_SIZE(st->channel_modes); i++) in ad5592r_reset_channel_modes()
299 st->channel_modes[i] = CH_MODE_UNUSED; in ad5592r_reset_channel_modes()
301 return ad5592r_set_channel_modes(st); in ad5592r_reset_channel_modes()
307 struct ad5592r_state *st = iio_priv(iio_dev); in ad5592r_write_raw() local
320 ret = st->ops->write_dac(st, chan->channel, val); in ad5592r_write_raw()
322 st->cached_dac[chan->channel] = val; in ad5592r_write_raw()
329 if (val == st->scale_avail[0][0] && in ad5592r_write_raw()
330 val2 == st->scale_avail[0][1]) in ad5592r_write_raw()
332 else if (val == st->scale_avail[1][0] && in ad5592r_write_raw()
333 val2 == st->scale_avail[1][1]) in ad5592r_write_raw()
340 ret = st->ops->reg_read(st, AD5592R_REG_CTRL, in ad5592r_write_raw()
341 &st->cached_gp_ctrl); in ad5592r_write_raw()
349 st->cached_gp_ctrl |= in ad5592r_write_raw()
352 st->cached_gp_ctrl &= in ad5592r_write_raw()
356 st->cached_gp_ctrl |= in ad5592r_write_raw()
359 st->cached_gp_ctrl &= in ad5592r_write_raw()
363 ret = st->ops->reg_write(st, AD5592R_REG_CTRL, in ad5592r_write_raw()
364 st->cached_gp_ctrl); in ad5592r_write_raw()
381 struct ad5592r_state *st = iio_priv(iio_dev); in ad5592r_read_raw() local
390 ret = st->ops->read_adc(st, chan->channel, &read_val); in ad5592r_read_raw()
395 dev_err(st->dev, "Error while reading channel %u\n", in ad5592r_read_raw()
404 read_val = st->cached_dac[chan->channel]; in ad5592r_read_raw()
407 dev_dbg(st->dev, "Channel %u read: 0x%04hX\n", in ad5592r_read_raw()
414 *val = ad5592r_get_vref(st); in ad5592r_read_raw()
427 mult = !!(st->cached_gp_ctrl & in ad5592r_read_raw()
430 mult = !!(st->cached_gp_ctrl & in ad5592r_read_raw()
440 ret = ad5592r_get_vref(st); in ad5592r_read_raw()
444 if (st->cached_gp_ctrl & AD5592R_REG_CTRL_ADC_RANGE) in ad5592r_read_raw()
484 struct ad5592r_state *st = iio_priv(iio_dev); in ad5592r_show_scale_available() local
487 st->scale_avail[0][0], st->scale_avail[0][1], in ad5592r_show_scale_available()
488 st->scale_avail[1][0], st->scale_avail[1][1]); in ad5592r_show_scale_available()
515 static int ad5592r_alloc_channels(struct ad5592r_state *st) in ad5592r_alloc_channels() argument
518 num_channels = st->num_channels; in ad5592r_alloc_channels()
519 struct iio_dev *iio_dev = iio_priv_to_dev(st); in ad5592r_alloc_channels()
525 device_for_each_child_node(st->dev, child) { in ad5592r_alloc_channels()
527 if (ret || reg >= ARRAY_SIZE(st->channel_modes)) in ad5592r_alloc_channels()
532 st->channel_modes[reg] = tmp; in ad5592r_alloc_channels()
536 st->channel_offstate[reg] = tmp; in ad5592r_alloc_channels()
539 channels = devm_kcalloc(st->dev, in ad5592r_alloc_channels()
546 switch (st->channel_modes[i]) { in ad5592r_alloc_channels()
586 static void ad5592r_init_scales(struct ad5592r_state *st, int vref_mV) in ad5592r_init_scales() argument
590 st->scale_avail[0][0] = in ad5592r_init_scales()
591 div_s64_rem(tmp, 1000000000LL, &st->scale_avail[0][1]); in ad5592r_init_scales()
592 st->scale_avail[1][0] = in ad5592r_init_scales()
593 div_s64_rem(tmp * 2, 1000000000LL, &st->scale_avail[1][1]); in ad5592r_init_scales()
600 struct ad5592r_state *st; in ad5592r_probe() local
603 iio_dev = devm_iio_device_alloc(dev, sizeof(*st)); in ad5592r_probe()
607 st = iio_priv(iio_dev); in ad5592r_probe()
608 st->dev = dev; in ad5592r_probe()
609 st->ops = ops; in ad5592r_probe()
610 st->num_channels = 8; in ad5592r_probe()
613 st->reg = devm_regulator_get_optional(dev, "vref"); in ad5592r_probe()
614 if (IS_ERR(st->reg)) { in ad5592r_probe()
615 if ((PTR_ERR(st->reg) != -ENODEV) && dev->of_node) in ad5592r_probe()
616 return PTR_ERR(st->reg); in ad5592r_probe()
618 st->reg = NULL; in ad5592r_probe()
620 ret = regulator_enable(st->reg); in ad5592r_probe()
630 ad5592r_init_scales(st, ad5592r_get_vref(st)); in ad5592r_probe()
632 ret = ad5592r_reset(st); in ad5592r_probe()
636 ret = ops->reg_write(st, AD5592R_REG_PD, in ad5592r_probe()
637 (st->reg == NULL) ? AD5592R_REG_PD_EN_REF : 0); in ad5592r_probe()
641 ret = ad5592r_alloc_channels(st); in ad5592r_probe()
645 ret = ad5592r_set_channel_modes(st); in ad5592r_probe()
653 ret = ad5592r_gpio_init(st); in ad5592r_probe()
663 ad5592r_reset_channel_modes(st); in ad5592r_probe()
666 if (st->reg) in ad5592r_probe()
667 regulator_disable(st->reg); in ad5592r_probe()
676 struct ad5592r_state *st = iio_priv(iio_dev); in ad5592r_remove() local
679 ad5592r_reset_channel_modes(st); in ad5592r_remove()
680 ad5592r_gpio_cleanup(st); in ad5592r_remove()
682 if (st->reg) in ad5592r_remove()
683 regulator_disable(st->reg); in ad5592r_remove()