Lines Matching +full:uv +full:- +full:shutdown
1 // SPDX-License-Identifier: GPL-2.0
3 // bd71837-regulator.c ROHM BD71837MWV/BD71847MWV regulator driver
9 #include <linux/mfd/rohm-bd718x7.h>
50 * controlled by software - or by PMIC internal HW state machine. Whether
51 * regulator should be under SW or HW control can be defined from device-tree.
102 * Note for next hacker - these PMICs have a register where the HW state can be
103 * read. If assuming RUN appears to be false in your use-case - you can
122 ret = regmap_read(rdev->regmap, rdev->desc->enable_reg, &val); in bd71837_get_buck34_enable_hwctrl()
132 * is changed. Hence we return -EBUSY for these if voltage is changed
136 * enabled. But if voltage is increased the LDO power-good monitoring
144 if (rdev->desc->ops->is_enabled(rdev)) in bd71837_set_voltage_sel_restricted()
145 return -EBUSY; in bd71837_set_voltage_sel_restricted()
158 * guarantee minimum of 1ms sleep - it shouldn't matter if we in voltage_change_done()
163 ret = regmap_clear_bits(rdev->regmap, BD718XX_REG_MVRFLTMASK2, in voltage_change_done()
166 dev_err(&rdev->dev, in voltage_change_done()
167 "Failed to re-enable voltage monitoring (%d)\n", in voltage_change_done()
178 if (rdev->desc->ops->is_enabled(rdev)) { in voltage_change_prepare()
181 now = rdev->desc->ops->get_voltage_sel(rdev); in voltage_change_prepare()
185 now = rdev->desc->ops->list_voltage(rdev, now); in voltage_change_prepare()
189 new = rdev->desc->ops->list_voltage(rdev, sel); in voltage_change_prepare()
195 * disable the power-good detection until voltage has reached in voltage_change_prepare()
198 * this might be less - and we could probably use DT to give in voltage_change_prepare()
210 int ldo_offset = rdev->desc->id - BD718XX_LDO1; in voltage_change_prepare()
213 ret = regmap_read(rdev->regmap, BD718XX_REG_MVRFLTMASK2, in voltage_change_prepare()
216 dev_err(&rdev->dev, in voltage_change_prepare()
223 ret = regmap_set_bits(rdev->regmap, in voltage_change_prepare()
226 /* ...and we also want to re-enable it */ in voltage_change_prepare()
230 dev_err(&rdev->dev, in voltage_change_prepare()
275 if (rdev->desc->ops->is_enabled(rdev)) in bd71837_set_voltage_sel_pickable_restricted()
276 return -EBUSY; in bd71837_set_voltage_sel_pickable_restricted()
466 dev_err(&rdev->dev, in bd718x7_xvp_sanity_check()
468 return -EINVAL; in bd718x7_xvp_sanity_check()
476 return -EINVAL; in bd718x7_xvp_sanity_check()
484 int ldo_offset = rdev->desc->id - BD718XX_LDO1; in bd718x7_set_ldo_uvp()
494 return regmap_clear_bits(rdev->regmap, BD718XX_REG_MVRFLTMASK2, in bd718x7_set_ldo_uvp()
497 return regmap_set_bits(rdev->regmap, BD718XX_REG_MVRFLTMASK2, in bd718x7_set_ldo_uvp()
506 return -EINVAL; in bd718x7_get_buck_prot_reg()
552 ret = bd718x7_get_buck_uvp_info(rdev->desc->id, ®, &bit); in bd718x7_set_buck_uvp()
557 return regmap_clear_bits(rdev->regmap, reg, bit); in bd718x7_set_buck_uvp()
559 return regmap_set_bits(rdev->regmap, reg, bit); in bd718x7_set_buck_uvp()
573 ret = bd718x7_get_buck_ovp_info(rdev->desc->id, ®, &bit); in bd718x7_set_buck_ovp()
578 return regmap_clear_bits(rdev->regmap, reg, bit); in bd718x7_set_buck_ovp()
580 return regmap_set_bits(rdev->regmap, reg, bit); in bd718x7_set_buck_ovp()
680 * OPS for all of the ICs - BD718(37/47/50)
691 * There is a HW quirk in BD71837. The shutdown sequence timings for
694 * beginning of shut-down sequence. As bucks 6 and 7 are parent
695 * supplies for LDO5 and LDO6 - this causes LDO5/6 voltage
724 return rohm_regulator_set_dvs_levels(&data->dvs, np, desc, cfg->regmap); in buck_set_hw_dvs_levels()
1518 if (!of_node_name_eq(np, reg_data[i-1].desc.of_match)) in mark_hw_controlled()
1521 *info |= 1 << (i - 1); in mark_hw_controlled()
1531 * to feedback-pin (over suitable resistors) is getting popular amongst users
1536 * - hence I keep the DVS disabled for non DVS bucks by default. I don't want
1542 * |------------|
1543 * | buck 8 |-------+----->Vout
1545 * |------------| |
1548 * +-------+--R2---+
1552 * V FB-pull-up
1556 * Vout_o = Vo - (Vpu - Vo)*R2/R1
1562 * Vpu is the pull-up voltage V FB-pull-up in the picture
1566 * VLDO = 1.6V (used as FB-pull-up)
1581 * one PMIC is controlled from same processor. I don't see such use-case in setup_feedback_loop()
1582 * for BD718x7 now - so we spare some bits. in setup_feedback_loop()
1584 * If this will point out to be a problem - then we can allocate new in setup_feedback_loop()
1589 * that means allocating new array for each PMIC - and currently I see in setup_feedback_loop()
1597 if (!of_node_name_eq(np, desc->of_match)) in setup_feedback_loop()
1600 pr_info("Looking at node '%s'\n", desc->of_match); in setup_feedback_loop()
1603 if (desc->id >= BD718XX_LDO1) in setup_feedback_loop()
1604 return -EINVAL; in setup_feedback_loop()
1606 ret = of_property_read_u32(np, "rohm,feedback-pull-up-r1-ohms", in setup_feedback_loop()
1612 return -EINVAL; in setup_feedback_loop()
1614 ret = of_property_read_u32(np, "rohm,feedback-pull-up-r2-ohms", in setup_feedback_loop()
1619 if (desc->n_linear_ranges && desc->linear_ranges) { in setup_feedback_loop()
1622 new = devm_kzalloc(dev, desc->n_linear_ranges * in setup_feedback_loop()
1626 return -ENOMEM; in setup_feedback_loop()
1628 for (j = 0; j < desc->n_linear_ranges; j++) { in setup_feedback_loop()
1629 int min = desc->linear_ranges[j].min; in setup_feedback_loop()
1630 int step = desc->linear_ranges[j].step; in setup_feedback_loop()
1632 min -= (fb_uv - min)*r2/r1; in setup_feedback_loop()
1640 desc->name, desc->linear_ranges[j].min, in setup_feedback_loop()
1641 desc->linear_ranges[j].step); in setup_feedback_loop()
1645 desc->linear_ranges = new; in setup_feedback_loop()
1647 dev_dbg(dev, "regulator '%s' has FB pull-up configured\n", in setup_feedback_loop()
1648 desc->name); in setup_feedback_loop()
1653 return -ENODEV; in setup_feedback_loop()
1662 struct device_node *nproot = dev->of_node; in get_special_regulators()
1663 int uv; in get_special_regulators() local
1670 return -ENODEV; in get_special_regulators()
1673 if (of_property_read_bool(np, "rohm,no-regulator-enable-control")) in get_special_regulators()
1676 ret = of_property_read_u32(np, "rohm,fb-pull-up-microvolt", in get_special_regulators()
1677 &uv); in get_special_regulators()
1679 if (ret == -EINVAL) in get_special_regulators()
1685 ret = setup_feedback_loop(dev, np, reg_data, num_reg_data, uv); in get_special_regulators()
1708 enum rohm_chip_type chip = platform_get_device_id(pdev)->driver_data; in bd718xx_probe()
1711 regmap = dev_get_regmap(pdev->dev.parent, NULL); in bd718xx_probe()
1713 dev_err(&pdev->dev, "No MFD driver data\n"); in bd718xx_probe()
1714 return -EINVAL; in bd718xx_probe()
1731 dev_err(&pdev->dev, "Unsupported chip type\n"); in bd718xx_probe()
1732 err = -EINVAL; in bd718xx_probe()
1740 dev_err(&pdev->dev, "Failed to unlock PMIC (%d)\n", err); in bd718xx_probe()
1743 dev_dbg(&pdev->dev, "Unlocked lock register 0x%x\n", in bd718xx_probe()
1747 use_snvs = of_property_read_bool(pdev->dev.parent->of_node, in bd718xx_probe()
1748 "rohm,reset-snvs-powered"); in bd718xx_probe()
1763 dev_err(&pdev->dev, "Failed to change reset target\n"); in bd718xx_probe()
1766 dev_dbg(&pdev->dev, in bd718xx_probe()
1771 config.dev = pdev->dev.parent; in bd718xx_probe()
1774 * There are cases when we want to leave the enable-control for in bd718xx_probe()
1780 * be affected by PMIC state machine - Eg. regulator is likely to stay in bd718xx_probe()
1783 err = get_special_regulators(pdev->dev.parent, reg_data, num_reg_data, in bd718xx_probe()
1796 desc = &r->desc; in bd718xx_probe()
1799 desc->ops = hwops[i]; in bd718xx_probe()
1801 desc->ops = swops[i]; in bd718xx_probe()
1803 rdev = devm_regulator_register(&pdev->dev, desc, &config); in bd718xx_probe()
1805 dev_err(&pdev->dev, in bd718xx_probe()
1807 desc->name); in bd718xx_probe()
1821 * transition from POWEROFF is done to SNVS - then all power in bd718xx_probe()
1829 !rdev->constraints->always_on || in bd718xx_probe()
1830 !rdev->constraints->boot_on)) { in bd718xx_probe()
1831 err = regmap_update_bits(regmap, r->init.reg, in bd718xx_probe()
1832 r->init.mask, r->init.val); in bd718xx_probe()
1834 dev_err(&pdev->dev, in bd718xx_probe()
1836 desc->name); in bd718xx_probe()
1840 for (j = 0; j < r->additional_init_amnt; j++) { in bd718xx_probe()
1842 r->additional_inits[j].reg, in bd718xx_probe()
1843 r->additional_inits[j].mask, in bd718xx_probe()
1844 r->additional_inits[j].val); in bd718xx_probe()
1846 dev_err(&pdev->dev, in bd718xx_probe()
1848 desc->name); in bd718xx_probe()
1859 { "bd71837-pmic", ROHM_CHIP_TYPE_BD71837 },
1860 { "bd71847-pmic", ROHM_CHIP_TYPE_BD71847 },
1867 .name = "bd718xx-pmic",
1878 MODULE_ALIAS("platform:bd718xx-pmic");