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@@ -0,0 +1,407 @@
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+// SPDX-License-Identifier: GPL-2.0+
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+/*
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+ * (C) Copyright 2019
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+ * Texas Instruments Incorporated, <www.ti.com>
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+ *
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+ * Keerthy <j-keerthy@ti.com>
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+ */
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+
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+#include <common.h>
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+#include <fdtdec.h>
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+#include <errno.h>
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+#include <dm.h>
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+#include <i2c.h>
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+#include <power/pmic.h>
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+#include <power/regulator.h>
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+#include <power/tps65941.h>
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+
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+static const char tps65941_buck_ctrl[TPS65941_BUCK_NUM] = {0x4, 0x6, 0x8, 0xA,
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+ 0xC};
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+static const char tps65941_buck_vout[TPS65941_BUCK_NUM] = {0xE, 0x10, 0x12,
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+ 0x14, 0x16};
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+static const char tps65941_ldo_ctrl[TPS65941_BUCK_NUM] = {0x1D, 0x1E, 0x1F,
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+ 0x20};
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+static const char tps65941_ldo_vout[TPS65941_BUCK_NUM] = {0x23, 0x24, 0x25,
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+ 0x26};
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+
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+static int tps65941_buck_enable(struct udevice *dev, int op, bool *enable)
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+{
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+ int ret;
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+ unsigned int adr;
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+ struct dm_regulator_uclass_platdata *uc_pdata;
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+
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+ uc_pdata = dev_get_uclass_platdata(dev);
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+ adr = uc_pdata->ctrl_reg;
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+
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+ ret = pmic_reg_read(dev->parent, adr);
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+ if (ret < 0)
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+ return ret;
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+
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+ if (op == PMIC_OP_GET) {
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+ ret &= TPS65941_BUCK_MODE_MASK;
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+
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+ if (ret)
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+ *enable = true;
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+ else
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+ *enable = false;
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+
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+ return 0;
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+ } else if (op == PMIC_OP_SET) {
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+ if (*enable)
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+ ret |= TPS65941_BUCK_MODE_MASK;
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+ else
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+ ret &= ~TPS65941_BUCK_MODE_MASK;
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+ ret = pmic_reg_write(dev->parent, adr, ret);
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+ if (ret)
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+ return ret;
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+ }
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+
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+ return 0;
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+}
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+
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+static int tps65941_buck_volt2val(int uV)
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+{
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+ if (uV > TPS65941_BUCK_VOLT_MAX)
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+ return -EINVAL;
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+ else if (uV > 1650000)
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+ return (uV - 1660000) / 20000 + 0xAB;
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+ else if (uV > 1110000)
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+ return (uV - 1110000) / 10000 + 0x73;
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+ else if (uV > 600000)
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+ return (uV - 600000) / 5000 + 0x0F;
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+ else if (uV >= 300000)
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+ return (uV - 300000) / 20000 + 0x00;
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+ else
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+ return -EINVAL;
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+}
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+
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+static int tps65941_buck_val2volt(int val)
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+{
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+ if (val > TPS65941_BUCK_VOLT_MAX_HEX)
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+ return -EINVAL;
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+ else if (val > 0xAB)
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+ return 1660000 + (val - 0xAB) * 20000;
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+ else if (val > 0x73)
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+ return 1100000 + (val - 0x73) * 10000;
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+ else if (val > 0xF)
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+ return 600000 + (val - 0xF) * 5000;
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+ else if (val >= 0x0)
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+ return 300000 + val * 5000;
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+ else
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+ return -EINVAL;
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+}
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+
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+int tps65941_lookup_slew(int id)
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+{
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+ switch (id) {
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+ case 0:
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+ return 33000;
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+ case 1:
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+ return 20000;
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+ case 2:
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+ return 10000;
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+ case 3:
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+ return 5000;
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+ case 4:
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+ return 2500;
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+ case 5:
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+ return 1300;
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+ case 6:
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+ return 630;
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+ case 7:
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+ return 310;
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+ default:
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+ return -1;
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+ }
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+}
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+
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+static int tps65941_buck_val(struct udevice *dev, int op, int *uV)
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+{
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+ unsigned int hex, adr;
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+ int ret, delta, uwait, slew;
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+ struct dm_regulator_uclass_platdata *uc_pdata;
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+
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+ uc_pdata = dev_get_uclass_platdata(dev);
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+
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+ if (op == PMIC_OP_GET)
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+ *uV = 0;
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+
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+ adr = uc_pdata->volt_reg;
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+
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+ ret = pmic_reg_read(dev->parent, adr);
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+ if (ret < 0)
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+ return ret;
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+
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+ ret &= TPS65941_BUCK_VOLT_MASK;
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+ ret = tps65941_buck_val2volt(ret);
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+ if (ret < 0)
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+ return ret;
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+
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+ if (op == PMIC_OP_GET) {
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+ *uV = ret;
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+ return 0;
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+ }
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+
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+ /*
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+ * Compute the delta voltage, find the slew rate and wait
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+ * for the appropriate amount of time after voltage switch
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+ */
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+ if (*uV > ret)
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+ delta = *uV - ret;
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+ else
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+ delta = ret - *uV;
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+
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+ slew = pmic_reg_read(dev->parent, uc_pdata->ctrl_reg + 1);
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+ if (slew < 0)
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+ return ret;
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+
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+ slew &= TP65941_BUCK_CONF_SLEW_MASK;
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+ slew = tps65941_lookup_slew(slew);
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+ if (slew <= 0)
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+ return ret;
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+
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+ uwait = delta / slew;
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+
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+ hex = tps65941_buck_volt2val(*uV);
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+ if (hex < 0)
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+ return hex;
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+
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+ ret &= 0x0;
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+ ret = hex;
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+
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+ ret = pmic_reg_write(dev->parent, adr, ret);
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+
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+ udelay(uwait);
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+
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+ return ret;
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+}
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+
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+static int tps65941_ldo_enable(struct udevice *dev, int op, bool *enable)
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+{
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+ int ret;
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+ unsigned int adr;
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+ struct dm_regulator_uclass_platdata *uc_pdata;
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+
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+ uc_pdata = dev_get_uclass_platdata(dev);
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+ adr = uc_pdata->ctrl_reg;
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+
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+ ret = pmic_reg_read(dev->parent, adr);
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+ if (ret < 0)
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+ return ret;
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+
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+ if (op == PMIC_OP_GET) {
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+ ret &= TPS65941_LDO_MODE_MASK;
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+
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+ if (ret)
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+ *enable = true;
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+ else
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+ *enable = false;
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+
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+ return 0;
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+ } else if (op == PMIC_OP_SET) {
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+ if (*enable)
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+ ret |= TPS65941_LDO_MODE_MASK;
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+ else
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+ ret &= ~TPS65941_LDO_MODE_MASK;
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+ ret = pmic_reg_write(dev->parent, adr, ret);
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+ if (ret)
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+ return ret;
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+ }
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+
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+ return 0;
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+}
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+
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+static int tps65941_ldo_val2volt(int val)
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+{
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+ if (val > TPS65941_LDO_VOLT_MAX_HEX || val < TPS65941_LDO_VOLT_MIN_HEX)
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+ return -EINVAL;
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+ else if (val >= TPS65941_LDO_VOLT_MIN_HEX)
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+ return 600000 + (val - TPS65941_LDO_VOLT_MIN_HEX) * 50000;
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+ else
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+ return -EINVAL;
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+}
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+
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+static int tps65941_ldo_val(struct udevice *dev, int op, int *uV)
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+{
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+ unsigned int hex, adr;
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+ int ret;
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+ struct dm_regulator_uclass_platdata *uc_pdata;
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+
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+ uc_pdata = dev_get_uclass_platdata(dev);
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+
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+ if (op == PMIC_OP_GET)
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+ *uV = 0;
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+
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+ adr = uc_pdata->volt_reg;
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+
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+ ret = pmic_reg_read(dev->parent, adr);
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+ if (ret < 0)
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+ return ret;
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+
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+ ret &= TPS65941_LDO_VOLT_MASK;
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+ ret = tps65941_ldo_val2volt(ret);
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+ if (ret < 0)
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+ return ret;
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+
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+ if (op == PMIC_OP_GET) {
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+ *uV = ret;
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+ return 0;
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+ }
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+
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+ hex = tps65941_buck_volt2val(*uV);
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+ if (hex < 0)
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+ return hex;
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+
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+ ret &= 0x0;
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+ ret = hex;
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+
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+ ret = pmic_reg_write(dev->parent, adr, ret);
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+
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+ return ret;
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+}
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+
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+static int tps65941_ldo_probe(struct udevice *dev)
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+{
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+ struct dm_regulator_uclass_platdata *uc_pdata;
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+ int idx;
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+
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+ uc_pdata = dev_get_uclass_platdata(dev);
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+ uc_pdata->type = REGULATOR_TYPE_LDO;
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+
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+ idx = dev->driver_data;
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+ if (idx == 1 || idx == 2 || idx == 3 || idx == 4) {
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+ debug("Single phase regulator\n");
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+ } else {
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+ printf("Wrong ID for regulator\n");
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+ return -EINVAL;
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+ }
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+
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+ uc_pdata->ctrl_reg = tps65941_ldo_ctrl[idx - 1];
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+ uc_pdata->volt_reg = tps65941_ldo_vout[idx - 1];
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+
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+ return 0;
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+}
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+
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+static int tps65941_buck_probe(struct udevice *dev)
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+{
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+ struct dm_regulator_uclass_platdata *uc_pdata;
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+ int idx;
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+
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+ uc_pdata = dev_get_uclass_platdata(dev);
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+ uc_pdata->type = REGULATOR_TYPE_BUCK;
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+
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+ idx = dev->driver_data;
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+ if (idx == 1 || idx == 2 || idx == 3 || idx == 4 || idx == 5) {
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+ debug("Single phase regulator\n");
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+ } else if (idx == 12) {
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+ idx = 1;
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+ } else if (idx == 34) {
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+ idx = 3;
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+ } else if (idx == 1234) {
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+ idx = 1;
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+ } else {
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+ printf("Wrong ID for regulator\n");
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+ return -EINVAL;
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+ }
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+
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+ uc_pdata->ctrl_reg = tps65941_buck_ctrl[idx - 1];
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+ uc_pdata->volt_reg = tps65941_buck_vout[idx - 1];
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+
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+ return 0;
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+}
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+
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+static int ldo_get_value(struct udevice *dev)
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+{
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+ int uV;
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+ int ret;
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+
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+ ret = tps65941_ldo_val(dev, PMIC_OP_GET, &uV);
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+ if (ret)
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+ return ret;
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+
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+ return uV;
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+}
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+
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+static int ldo_set_value(struct udevice *dev, int uV)
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+{
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+ return tps65941_ldo_val(dev, PMIC_OP_SET, &uV);
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+}
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+
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+static int ldo_get_enable(struct udevice *dev)
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+{
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+ bool enable = false;
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+ int ret;
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+
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+ ret = tps65941_ldo_enable(dev, PMIC_OP_GET, &enable);
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+ if (ret)
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+ return ret;
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+
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+ return enable;
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+}
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+
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+static int ldo_set_enable(struct udevice *dev, bool enable)
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+{
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+ return tps65941_ldo_enable(dev, PMIC_OP_SET, &enable);
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+}
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+
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+static int buck_get_value(struct udevice *dev)
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+{
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+ int uV;
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+ int ret;
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+
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+ ret = tps65941_buck_val(dev, PMIC_OP_GET, &uV);
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+ if (ret)
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+ return ret;
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+
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+ return uV;
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+}
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+
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+static int buck_set_value(struct udevice *dev, int uV)
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+{
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+ return tps65941_buck_val(dev, PMIC_OP_SET, &uV);
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+}
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+
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+static int buck_get_enable(struct udevice *dev)
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+{
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+ bool enable = false;
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+ int ret;
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+
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+ ret = tps65941_buck_enable(dev, PMIC_OP_GET, &enable);
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+ if (ret)
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+ return ret;
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+
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+ return enable;
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+}
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+
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+static int buck_set_enable(struct udevice *dev, bool enable)
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+{
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+ return tps65941_buck_enable(dev, PMIC_OP_SET, &enable);
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+}
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+
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+static const struct dm_regulator_ops tps65941_ldo_ops = {
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+ .get_value = ldo_get_value,
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+ .set_value = ldo_set_value,
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+ .get_enable = ldo_get_enable,
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+ .set_enable = ldo_set_enable,
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+};
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+
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+U_BOOT_DRIVER(tps65941_ldo) = {
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+ .name = TPS65941_LDO_DRIVER,
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+ .id = UCLASS_REGULATOR,
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+ .ops = &tps65941_ldo_ops,
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+ .probe = tps65941_ldo_probe,
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+};
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+
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+static const struct dm_regulator_ops tps65941_buck_ops = {
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+ .get_value = buck_get_value,
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+ .set_value = buck_set_value,
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+ .get_enable = buck_get_enable,
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+ .set_enable = buck_set_enable,
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+};
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+
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+U_BOOT_DRIVER(tps65941_buck) = {
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+ .name = TPS65941_BUCK_DRIVER,
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+ .id = UCLASS_REGULATOR,
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+ .ops = &tps65941_buck_ops,
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+ .probe = tps65941_buck_probe,
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+};
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