Lines Matching refs:lradc
9 * Allwinnner sunxi SoCs have a lradc which is specifically designed to have
58 /* struct lradc_variant - Describe sun4i-a10-lradc-keys hardware variant
59 * @divisor_numerator: The numerator of lradc Vref internally divisor
60 * @divisor_denominator: The denominator of lradc Vref internally divisor
96 struct sun4i_lradc_data *lradc = dev_id;
99 ints = readl(lradc->base + LRADC_INTS);
102 * lradc supports only one keypress at a time, release does not give
107 input_report_key(lradc->input, lradc->chan0_keycode, 0);
108 lradc->chan0_keycode = 0;
111 if ((ints & CHAN0_KEYDOWN_IRQ) && lradc->chan0_keycode == 0) {
112 val = readl(lradc->base + LRADC_DATA0) & 0x3f;
113 voltage = val * lradc->vref / 63;
115 for (i = 0; i < lradc->chan0_map_count; i++) {
116 diff = abs(lradc->chan0_map[i].voltage - voltage);
119 keycode = lradc->chan0_map[i].keycode;
123 lradc->chan0_keycode = keycode;
124 input_report_key(lradc->input, lradc->chan0_keycode, 1);
127 input_sync(lradc->input);
129 writel(ints, lradc->base + LRADC_INTS);
136 struct sun4i_lradc_data *lradc = input_get_drvdata(dev);
139 error = regulator_enable(lradc->vref_supply);
143 lradc->vref = regulator_get_voltage(lradc->vref_supply) *
144 lradc->variant->divisor_numerator /
145 lradc->variant->divisor_denominator;
151 SAMPLE_RATE(0) | ENABLE(1), lradc->base + LRADC_CTRL);
153 writel(CHAN0_KEYUP_IRQ | CHAN0_KEYDOWN_IRQ, lradc->base + LRADC_INTC);
160 struct sun4i_lradc_data *lradc = input_get_drvdata(dev);
162 /* Disable lradc, leave other settings unchanged */
164 SAMPLE_RATE(2), lradc->base + LRADC_CTRL);
165 writel(0, lradc->base + LRADC_INTC);
167 regulator_disable(lradc->vref_supply);
171 struct sun4i_lradc_data *lradc)
181 lradc->chan0_map_count = of_get_child_count(np);
182 if (lradc->chan0_map_count == 0) {
187 lradc->chan0_map = devm_kmalloc_array(dev, lradc->chan0_map_count,
190 if (!lradc->chan0_map)
195 struct sun4i_lradc_keymap *map = &lradc->chan0_map[i];
227 struct sun4i_lradc_data *lradc;
232 lradc = devm_kzalloc(dev, sizeof(struct sun4i_lradc_data), GFP_KERNEL);
233 if (!lradc)
236 error = sun4i_lradc_load_dt_keymap(dev, lradc);
240 lradc->variant = of_device_get_match_data(&pdev->dev);
241 if (!lradc->variant) {
242 dev_err(&pdev->dev, "Missing sun4i-a10-lradc-keys variant\n");
246 lradc->vref_supply = devm_regulator_get(dev, "vref");
247 if (IS_ERR(lradc->vref_supply))
248 return PTR_ERR(lradc->vref_supply);
250 lradc->dev = dev;
251 lradc->input = devm_input_allocate_device(dev);
252 if (!lradc->input)
255 lradc->input->name = pdev->name;
256 lradc->input->phys = "sun4i_lradc/input0";
257 lradc->input->open = sun4i_lradc_open;
258 lradc->input->close = sun4i_lradc_close;
259 lradc->input->id.bustype = BUS_HOST;
260 lradc->input->id.vendor = 0x0001;
261 lradc->input->id.product = 0x0001;
262 lradc->input->id.version = 0x0100;
264 __set_bit(EV_KEY, lradc->input->evbit);
265 for (i = 0; i < lradc->chan0_map_count; i++)
266 __set_bit(lradc->chan0_map[i].keycode, lradc->input->keybit);
268 input_set_drvdata(lradc->input, lradc);
270 lradc->base = devm_ioremap_resource(dev,
272 if (IS_ERR(lradc->base))
273 return PTR_ERR(lradc->base);
277 "sun4i-a10-lradc-keys", lradc);
281 error = input_register_device(lradc->input);
289 { .compatible = "allwinner,sun4i-a10-lradc-keys",
291 { .compatible = "allwinner,sun8i-a83t-r-lradc",
299 .name = "sun4i-a10-lradc-keys",