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220 lines
6.1 KiB
220 lines
6.1 KiB
// SPDX-License-Identifier: GPL-2.0 |
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// |
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// Regulator Driver for Freescale MC13xxx PMIC |
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// |
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// Copyright 2010 Yong Shen <[email protected]> |
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// |
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// Based on mc13783 regulator driver : |
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// Copyright (C) 2008 Sascha Hauer, Pengutronix <[email protected]> |
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// Copyright 2009 Alberto Panizzo <[email protected]> |
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// |
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// Regs infos taken from mc13xxx drivers from freescale and mc13xxx.pdf file |
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// from freescale |
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#include <linux/mfd/mc13xxx.h> |
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#include <linux/regulator/machine.h> |
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#include <linux/regulator/driver.h> |
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#include <linux/regulator/of_regulator.h> |
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#include <linux/platform_device.h> |
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#include <linux/kernel.h> |
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#include <linux/slab.h> |
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#include <linux/init.h> |
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#include <linux/err.h> |
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#include <linux/module.h> |
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#include <linux/of.h> |
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#include "mc13xxx.h" |
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static int mc13xxx_regulator_enable(struct regulator_dev *rdev) |
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{ |
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struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev); |
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struct mc13xxx_regulator *mc13xxx_regulators = priv->mc13xxx_regulators; |
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int id = rdev_get_id(rdev); |
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dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id); |
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return mc13xxx_reg_rmw(priv->mc13xxx, mc13xxx_regulators[id].reg, |
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mc13xxx_regulators[id].enable_bit, |
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mc13xxx_regulators[id].enable_bit); |
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} |
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static int mc13xxx_regulator_disable(struct regulator_dev *rdev) |
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{ |
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struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev); |
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struct mc13xxx_regulator *mc13xxx_regulators = priv->mc13xxx_regulators; |
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int id = rdev_get_id(rdev); |
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dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id); |
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return mc13xxx_reg_rmw(priv->mc13xxx, mc13xxx_regulators[id].reg, |
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mc13xxx_regulators[id].enable_bit, 0); |
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} |
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static int mc13xxx_regulator_is_enabled(struct regulator_dev *rdev) |
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{ |
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struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev); |
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struct mc13xxx_regulator *mc13xxx_regulators = priv->mc13xxx_regulators; |
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int ret, id = rdev_get_id(rdev); |
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unsigned int val; |
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ret = mc13xxx_reg_read(priv->mc13xxx, mc13xxx_regulators[id].reg, &val); |
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if (ret) |
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return ret; |
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return (val & mc13xxx_regulators[id].enable_bit) != 0; |
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} |
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static int mc13xxx_regulator_set_voltage_sel(struct regulator_dev *rdev, |
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unsigned selector) |
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{ |
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struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev); |
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struct mc13xxx_regulator *mc13xxx_regulators = priv->mc13xxx_regulators; |
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int id = rdev_get_id(rdev); |
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return mc13xxx_reg_rmw(priv->mc13xxx, mc13xxx_regulators[id].vsel_reg, |
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mc13xxx_regulators[id].vsel_mask, |
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selector << mc13xxx_regulators[id].vsel_shift); |
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} |
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static int mc13xxx_regulator_get_voltage(struct regulator_dev *rdev) |
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{ |
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struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev); |
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struct mc13xxx_regulator *mc13xxx_regulators = priv->mc13xxx_regulators; |
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int ret, id = rdev_get_id(rdev); |
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unsigned int val; |
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dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id); |
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ret = mc13xxx_reg_read(priv->mc13xxx, |
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mc13xxx_regulators[id].vsel_reg, &val); |
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if (ret) |
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return ret; |
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val = (val & mc13xxx_regulators[id].vsel_mask) |
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>> mc13xxx_regulators[id].vsel_shift; |
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dev_dbg(rdev_get_dev(rdev), "%s id: %d val: %d\n", __func__, id, val); |
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BUG_ON(val >= mc13xxx_regulators[id].desc.n_voltages); |
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return rdev->desc->volt_table[val]; |
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} |
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const struct regulator_ops mc13xxx_regulator_ops = { |
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.enable = mc13xxx_regulator_enable, |
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.disable = mc13xxx_regulator_disable, |
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.is_enabled = mc13xxx_regulator_is_enabled, |
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.list_voltage = regulator_list_voltage_table, |
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.set_voltage_sel = mc13xxx_regulator_set_voltage_sel, |
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.get_voltage = mc13xxx_regulator_get_voltage, |
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}; |
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EXPORT_SYMBOL_GPL(mc13xxx_regulator_ops); |
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int mc13xxx_fixed_regulator_set_voltage(struct regulator_dev *rdev, int min_uV, |
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int max_uV, unsigned *selector) |
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{ |
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int id = rdev_get_id(rdev); |
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dev_dbg(rdev_get_dev(rdev), "%s id: %d min_uV: %d max_uV: %d\n", |
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__func__, id, min_uV, max_uV); |
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if (min_uV <= rdev->desc->volt_table[0] && |
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rdev->desc->volt_table[0] <= max_uV) { |
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*selector = 0; |
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return 0; |
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} else { |
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return -EINVAL; |
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} |
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} |
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EXPORT_SYMBOL_GPL(mc13xxx_fixed_regulator_set_voltage); |
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const struct regulator_ops mc13xxx_fixed_regulator_ops = { |
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.enable = mc13xxx_regulator_enable, |
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.disable = mc13xxx_regulator_disable, |
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.is_enabled = mc13xxx_regulator_is_enabled, |
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.list_voltage = regulator_list_voltage_table, |
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.set_voltage = mc13xxx_fixed_regulator_set_voltage, |
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}; |
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EXPORT_SYMBOL_GPL(mc13xxx_fixed_regulator_ops); |
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#ifdef CONFIG_OF |
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int mc13xxx_get_num_regulators_dt(struct platform_device *pdev) |
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{ |
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struct device_node *parent; |
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int num; |
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if (!pdev->dev.parent->of_node) |
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return -ENODEV; |
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parent = of_get_child_by_name(pdev->dev.parent->of_node, "regulators"); |
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if (!parent) |
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return -ENODEV; |
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num = of_get_child_count(parent); |
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of_node_put(parent); |
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return num; |
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} |
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EXPORT_SYMBOL_GPL(mc13xxx_get_num_regulators_dt); |
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struct mc13xxx_regulator_init_data *mc13xxx_parse_regulators_dt( |
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struct platform_device *pdev, struct mc13xxx_regulator *regulators, |
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int num_regulators) |
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{ |
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struct mc13xxx_regulator_priv *priv = platform_get_drvdata(pdev); |
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struct mc13xxx_regulator_init_data *data, *p; |
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struct device_node *parent, *child; |
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int i, parsed = 0; |
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if (!pdev->dev.parent->of_node) |
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return NULL; |
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parent = of_get_child_by_name(pdev->dev.parent->of_node, "regulators"); |
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if (!parent) |
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return NULL; |
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data = devm_kcalloc(&pdev->dev, priv->num_regulators, sizeof(*data), |
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GFP_KERNEL); |
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if (!data) { |
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of_node_put(parent); |
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return NULL; |
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} |
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p = data; |
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for_each_child_of_node(parent, child) { |
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int found = 0; |
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for (i = 0; i < num_regulators; i++) { |
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if (!regulators[i].desc.name) |
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continue; |
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if (of_node_name_eq(child, |
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regulators[i].desc.name)) { |
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p->id = i; |
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p->init_data = of_get_regulator_init_data( |
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&pdev->dev, child, |
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®ulators[i].desc); |
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p->node = child; |
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p++; |
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parsed++; |
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found = 1; |
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break; |
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} |
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} |
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if (!found) |
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dev_warn(&pdev->dev, |
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"Unknown regulator: %pOFn\n", child); |
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} |
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of_node_put(parent); |
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priv->num_regulators = parsed; |
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return data; |
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} |
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EXPORT_SYMBOL_GPL(mc13xxx_parse_regulators_dt); |
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#endif |
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MODULE_LICENSE("GPL v2"); |
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MODULE_AUTHOR("Yong Shen <[email protected]>"); |
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MODULE_DESCRIPTION("Regulator Driver for Freescale MC13xxx PMIC"); |
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MODULE_ALIAS("mc13xxx-regulator-core");
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