1 // SPDX-License-Identifier: GPL-2.0+
4 * Texas Instruments Incorporated, <www.ti.com>
6 * Keerthy <j-keerthy@ti.com>
15 #include <linux/delay.h>
16 #include <power/pmic.h>
17 #include <power/regulator.h>
18 #include <power/tps65941.h>
20 static const char tps65941_buck_ctrl[TPS65941_BUCK_NUM] = {0x4, 0x6, 0x8, 0xA,
22 static const char tps65941_buck_vout[TPS65941_BUCK_NUM] = {0xE, 0x10, 0x12,
24 static const char tps65941_ldo_ctrl[TPS65941_BUCK_NUM] = {0x1D, 0x1E, 0x1F,
26 static const char tps65941_ldo_vout[TPS65941_BUCK_NUM] = {0x23, 0x24, 0x25,
29 static int tps65941_buck_enable(struct udevice *dev, int op, bool *enable)
33 struct dm_regulator_uclass_plat *uc_pdata;
35 uc_pdata = dev_get_uclass_plat(dev);
36 adr = uc_pdata->ctrl_reg;
38 ret = pmic_reg_read(dev->parent, adr);
42 if (op == PMIC_OP_GET) {
43 ret &= TPS65941_BUCK_MODE_MASK;
51 } else if (op == PMIC_OP_SET) {
53 ret |= TPS65941_BUCK_MODE_MASK;
55 ret &= ~TPS65941_BUCK_MODE_MASK;
56 ret = pmic_reg_write(dev->parent, adr, ret);
64 static int tps65941_buck_volt2val(int uV)
66 if (uV > TPS65941_BUCK_VOLT_MAX)
68 else if (uV > 1650000)
69 return (uV - 1660000) / 20000 + 0xAB;
70 else if (uV > 1110000)
71 return (uV - 1110000) / 10000 + 0x73;
73 return (uV - 600000) / 5000 + 0x0F;
74 else if (uV >= 300000)
75 return (uV - 300000) / 20000 + 0x00;
80 static int tps65941_buck_val2volt(int val)
82 if (val > TPS65941_BUCK_VOLT_MAX_HEX)
85 return 1660000 + (val - 0xAB) * 20000;
87 return 1100000 + (val - 0x73) * 10000;
89 return 600000 + (val - 0xF) * 5000;
91 return 300000 + val * 5000;
96 int tps65941_lookup_slew(int id)
120 static int tps65941_buck_val(struct udevice *dev, int op, int *uV)
122 unsigned int hex, adr;
123 int ret, delta, uwait, slew;
124 struct dm_regulator_uclass_plat *uc_pdata;
126 uc_pdata = dev_get_uclass_plat(dev);
128 if (op == PMIC_OP_GET)
131 adr = uc_pdata->volt_reg;
133 ret = pmic_reg_read(dev->parent, adr);
137 ret &= TPS65941_BUCK_VOLT_MASK;
138 ret = tps65941_buck_val2volt(ret);
142 if (op == PMIC_OP_GET) {
148 * Compute the delta voltage, find the slew rate and wait
149 * for the appropriate amount of time after voltage switch
156 slew = pmic_reg_read(dev->parent, uc_pdata->ctrl_reg + 1);
160 slew &= TP65941_BUCK_CONF_SLEW_MASK;
161 slew = tps65941_lookup_slew(slew);
165 uwait = delta / slew;
167 hex = tps65941_buck_volt2val(*uV);
174 ret = pmic_reg_write(dev->parent, adr, ret);
181 static int tps65941_ldo_enable(struct udevice *dev, int op, bool *enable)
185 struct dm_regulator_uclass_plat *uc_pdata;
187 uc_pdata = dev_get_uclass_plat(dev);
188 adr = uc_pdata->ctrl_reg;
190 ret = pmic_reg_read(dev->parent, adr);
194 if (op == PMIC_OP_GET) {
195 ret &= TPS65941_LDO_MODE_MASK;
203 } else if (op == PMIC_OP_SET) {
205 ret |= TPS65941_LDO_MODE_MASK;
207 ret &= ~TPS65941_LDO_MODE_MASK;
208 ret = pmic_reg_write(dev->parent, adr, ret);
216 static int tps65941_ldo_val2volt(int val)
218 if (val > TPS65941_LDO_VOLT_MAX_HEX || val < TPS65941_LDO_VOLT_MIN_HEX)
220 else if (val >= TPS65941_LDO_VOLT_MIN_HEX)
221 return 600000 + (val - TPS65941_LDO_VOLT_MIN_HEX) * 50000;
226 static int tps65941_ldo_val(struct udevice *dev, int op, int *uV)
228 unsigned int hex, adr;
230 struct dm_regulator_uclass_plat *uc_pdata;
232 uc_pdata = dev_get_uclass_plat(dev);
234 if (op == PMIC_OP_GET)
237 adr = uc_pdata->volt_reg;
239 ret = pmic_reg_read(dev->parent, adr);
243 ret &= TPS65941_LDO_VOLT_MASK;
244 ret = tps65941_ldo_val2volt(ret);
248 if (op == PMIC_OP_GET) {
253 hex = tps65941_buck_volt2val(*uV);
260 ret = pmic_reg_write(dev->parent, adr, ret);
265 static int tps65941_ldo_probe(struct udevice *dev)
267 struct dm_regulator_uclass_plat *uc_pdata;
270 uc_pdata = dev_get_uclass_plat(dev);
271 uc_pdata->type = REGULATOR_TYPE_LDO;
273 idx = dev->driver_data;
274 if (idx == 1 || idx == 2 || idx == 3 || idx == 4) {
275 debug("Single phase regulator\n");
277 printf("Wrong ID for regulator\n");
281 uc_pdata->ctrl_reg = tps65941_ldo_ctrl[idx - 1];
282 uc_pdata->volt_reg = tps65941_ldo_vout[idx - 1];
287 static int tps65941_buck_probe(struct udevice *dev)
289 struct dm_regulator_uclass_plat *uc_pdata;
292 uc_pdata = dev_get_uclass_plat(dev);
293 uc_pdata->type = REGULATOR_TYPE_BUCK;
295 idx = dev->driver_data;
296 if (idx == 1 || idx == 2 || idx == 3 || idx == 4 || idx == 5) {
297 debug("Single phase regulator\n");
298 } else if (idx == 12) {
300 } else if (idx == 34) {
302 } else if (idx == 123) {
304 } else if (idx == 1234) {
307 printf("Wrong ID for regulator\n");
311 uc_pdata->ctrl_reg = tps65941_buck_ctrl[idx - 1];
312 uc_pdata->volt_reg = tps65941_buck_vout[idx - 1];
317 static int ldo_get_value(struct udevice *dev)
322 ret = tps65941_ldo_val(dev, PMIC_OP_GET, &uV);
329 static int ldo_set_value(struct udevice *dev, int uV)
331 return tps65941_ldo_val(dev, PMIC_OP_SET, &uV);
334 static int ldo_get_enable(struct udevice *dev)
339 ret = tps65941_ldo_enable(dev, PMIC_OP_GET, &enable);
346 static int ldo_set_enable(struct udevice *dev, bool enable)
348 return tps65941_ldo_enable(dev, PMIC_OP_SET, &enable);
351 static int buck_get_value(struct udevice *dev)
356 ret = tps65941_buck_val(dev, PMIC_OP_GET, &uV);
363 static int buck_set_value(struct udevice *dev, int uV)
365 return tps65941_buck_val(dev, PMIC_OP_SET, &uV);
368 static int buck_get_enable(struct udevice *dev)
373 ret = tps65941_buck_enable(dev, PMIC_OP_GET, &enable);
380 static int buck_set_enable(struct udevice *dev, bool enable)
382 return tps65941_buck_enable(dev, PMIC_OP_SET, &enable);
385 static const struct dm_regulator_ops tps65941_ldo_ops = {
386 .get_value = ldo_get_value,
387 .set_value = ldo_set_value,
388 .get_enable = ldo_get_enable,
389 .set_enable = ldo_set_enable,
392 U_BOOT_DRIVER(tps65941_ldo) = {
393 .name = TPS65941_LDO_DRIVER,
394 .id = UCLASS_REGULATOR,
395 .ops = &tps65941_ldo_ops,
396 .probe = tps65941_ldo_probe,
399 static const struct dm_regulator_ops tps65941_buck_ops = {
400 .get_value = buck_get_value,
401 .set_value = buck_set_value,
402 .get_enable = buck_get_enable,
403 .set_enable = buck_set_enable,
406 U_BOOT_DRIVER(tps65941_buck) = {
407 .name = TPS65941_BUCK_DRIVER,
408 .id = UCLASS_REGULATOR,
409 .ops = &tps65941_buck_ops,
410 .probe = tps65941_buck_probe,