| /* |
| * PCAP2 Regulator Driver |
| * |
| * Copyright (c) 2009 Daniel Ribeiro <drwyrm@gmail.com> |
| * |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License as published by the |
| * Free Software Foundation; either version 2 of the License, or (at your |
| * option) any later version. |
| */ |
| |
| #include <linux/kernel.h> |
| #include <linux/module.h> |
| #include <linux/init.h> |
| #include <linux/err.h> |
| #include <linux/platform_device.h> |
| #include <linux/regulator/driver.h> |
| #include <linux/regulator/machine.h> |
| #include <linux/mfd/ezx-pcap.h> |
| |
| static const u16 V1_table[] = { |
| 2775, 1275, 1600, 1725, 1825, 1925, 2075, 2275, |
| }; |
| |
| static const u16 V2_table[] = { |
| 2500, 2775, |
| }; |
| |
| static const u16 V3_table[] = { |
| 1075, 1275, 1550, 1725, 1876, 1950, 2075, 2275, |
| }; |
| |
| static const u16 V4_table[] = { |
| 1275, 1550, 1725, 1875, 1950, 2075, 2275, 2775, |
| }; |
| |
| static const u16 V5_table[] = { |
| 1875, 2275, 2475, 2775, |
| }; |
| |
| static const u16 V6_table[] = { |
| 2475, 2775, |
| }; |
| |
| static const u16 V7_table[] = { |
| 1875, 2775, |
| }; |
| |
| #define V8_table V4_table |
| |
| static const u16 V9_table[] = { |
| 1575, 1875, 2475, 2775, |
| }; |
| |
| static const u16 V10_table[] = { |
| 5000, |
| }; |
| |
| static const u16 VAUX1_table[] = { |
| 1875, 2475, 2775, 3000, |
| }; |
| |
| #define VAUX2_table VAUX1_table |
| |
| static const u16 VAUX3_table[] = { |
| 1200, 1200, 1200, 1200, 1400, 1600, 1800, 2000, |
| 2200, 2400, 2600, 2800, 3000, 3200, 3400, 3600, |
| }; |
| |
| static const u16 VAUX4_table[] = { |
| 1800, 1800, 3000, 5000, |
| }; |
| |
| static const u16 VSIM_table[] = { |
| 1875, 3000, |
| }; |
| |
| static const u16 VSIM2_table[] = { |
| 1875, |
| }; |
| |
| static const u16 VVIB_table[] = { |
| 1300, 1800, 2000, 3000, |
| }; |
| |
| static const u16 SW1_table[] = { |
| 900, 950, 1000, 1050, 1100, 1150, 1200, 1250, |
| 1300, 1350, 1400, 1450, 1500, 1600, 1875, 2250, |
| }; |
| |
| #define SW2_table SW1_table |
| |
| static const u16 SW3_table[] = { |
| 4000, 4500, 5000, 5500, |
| }; |
| |
| struct pcap_regulator { |
| const u8 reg; |
| const u8 en; |
| const u8 index; |
| const u8 stby; |
| const u8 lowpwr; |
| const u8 n_voltages; |
| const u16 *voltage_table; |
| }; |
| |
| #define NA 0xff |
| |
| #define VREG_INFO(_vreg, _reg, _en, _index, _stby, _lowpwr) \ |
| [_vreg] = { \ |
| .reg = _reg, \ |
| .en = _en, \ |
| .index = _index, \ |
| .stby = _stby, \ |
| .lowpwr = _lowpwr, \ |
| .n_voltages = ARRAY_SIZE(_vreg##_table), \ |
| .voltage_table = _vreg##_table, \ |
| } |
| |
| static struct pcap_regulator vreg_table[] = { |
| VREG_INFO(V1, PCAP_REG_VREG1, 1, 2, 18, 0), |
| VREG_INFO(V2, PCAP_REG_VREG1, 5, 6, 19, 22), |
| VREG_INFO(V3, PCAP_REG_VREG1, 7, 8, 20, 23), |
| VREG_INFO(V4, PCAP_REG_VREG1, 11, 12, 21, 24), |
| /* V5 STBY and LOWPWR are on PCAP_REG_VREG2 */ |
| VREG_INFO(V5, PCAP_REG_VREG1, 15, 16, 12, 19), |
| |
| VREG_INFO(V6, PCAP_REG_VREG2, 1, 2, 14, 20), |
| VREG_INFO(V7, PCAP_REG_VREG2, 3, 4, 15, 21), |
| VREG_INFO(V8, PCAP_REG_VREG2, 5, 6, 16, 22), |
| VREG_INFO(V9, PCAP_REG_VREG2, 9, 10, 17, 23), |
| VREG_INFO(V10, PCAP_REG_VREG2, 10, NA, 18, 24), |
| |
| VREG_INFO(VAUX1, PCAP_REG_AUXVREG, 1, 2, 22, 23), |
| /* VAUX2 ... VSIM2 STBY and LOWPWR are on PCAP_REG_LOWPWR */ |
| VREG_INFO(VAUX2, PCAP_REG_AUXVREG, 4, 5, 0, 1), |
| VREG_INFO(VAUX3, PCAP_REG_AUXVREG, 7, 8, 2, 3), |
| VREG_INFO(VAUX4, PCAP_REG_AUXVREG, 12, 13, 4, 5), |
| VREG_INFO(VSIM, PCAP_REG_AUXVREG, 17, 18, NA, 6), |
| VREG_INFO(VSIM2, PCAP_REG_AUXVREG, 16, NA, NA, 7), |
| VREG_INFO(VVIB, PCAP_REG_AUXVREG, 19, 20, NA, NA), |
| |
| VREG_INFO(SW1, PCAP_REG_SWCTRL, 1, 2, NA, NA), |
| VREG_INFO(SW2, PCAP_REG_SWCTRL, 6, 7, NA, NA), |
| /* SW3 STBY is on PCAP_REG_AUXVREG */ |
| VREG_INFO(SW3, PCAP_REG_SWCTRL, 11, 12, 24, NA), |
| |
| /* SWxS used to control SWx voltage on standby */ |
| /* VREG_INFO(SW1S, PCAP_REG_LOWPWR, NA, 12, NA, NA), |
| VREG_INFO(SW2S, PCAP_REG_LOWPWR, NA, 20, NA, NA), */ |
| }; |
| |
| static int pcap_regulator_set_voltage(struct regulator_dev *rdev, |
| int min_uV, int max_uV) |
| { |
| struct pcap_regulator *vreg = &vreg_table[rdev_get_id(rdev)]; |
| void *pcap = rdev_get_drvdata(rdev); |
| int uV; |
| u8 i; |
| |
| /* the regulator doesn't support voltage switching */ |
| if (vreg->n_voltages == 1) |
| return -EINVAL; |
| |
| for (i = 0; i < vreg->n_voltages; i++) { |
| /* For V1 the first is not the best match */ |
| if (i == 0 && rdev_get_id(rdev) == V1) |
| i = 1; |
| else if (i + 1 == vreg->n_voltages && rdev_get_id(rdev) == V1) |
| i = 0; |
| |
| uV = vreg->voltage_table[i] * 1000; |
| if (min_uV <= uV && uV <= max_uV) |
| return ezx_pcap_set_bits(pcap, vreg->reg, |
| (vreg->n_voltages - 1) << vreg->index, |
| i << vreg->index); |
| |
| if (i == 0 && rdev_get_id(rdev) == V1) |
| i = vreg->n_voltages - 1; |
| } |
| |
| /* the requested voltage range is not supported by this regulator */ |
| return -EINVAL; |
| } |
| |
| static int pcap_regulator_get_voltage(struct regulator_dev *rdev) |
| { |
| struct pcap_regulator *vreg = &vreg_table[rdev_get_id(rdev)]; |
| void *pcap = rdev_get_drvdata(rdev); |
| u32 tmp; |
| int mV; |
| |
| if (vreg->n_voltages == 1) |
| return vreg->voltage_table[0] * 1000; |
| |
| ezx_pcap_read(pcap, vreg->reg, &tmp); |
| tmp = ((tmp >> vreg->index) & (vreg->n_voltages - 1)); |
| mV = vreg->voltage_table[tmp]; |
| |
| return mV * 1000; |
| } |
| |
| static int pcap_regulator_enable(struct regulator_dev *rdev) |
| { |
| struct pcap_regulator *vreg = &vreg_table[rdev_get_id(rdev)]; |
| void *pcap = rdev_get_drvdata(rdev); |
| |
| if (vreg->en == NA) |
| return -EINVAL; |
| |
| return ezx_pcap_set_bits(pcap, vreg->reg, 1 << vreg->en, 1 << vreg->en); |
| } |
| |
| static int pcap_regulator_disable(struct regulator_dev *rdev) |
| { |
| struct pcap_regulator *vreg = &vreg_table[rdev_get_id(rdev)]; |
| void *pcap = rdev_get_drvdata(rdev); |
| |
| if (vreg->en == NA) |
| return -EINVAL; |
| |
| return ezx_pcap_set_bits(pcap, vreg->reg, 1 << vreg->en, 0); |
| } |
| |
| static int pcap_regulator_is_enabled(struct regulator_dev *rdev) |
| { |
| struct pcap_regulator *vreg = &vreg_table[rdev_get_id(rdev)]; |
| void *pcap = rdev_get_drvdata(rdev); |
| u32 tmp; |
| |
| if (vreg->en == NA) |
| return -EINVAL; |
| |
| ezx_pcap_read(pcap, vreg->reg, &tmp); |
| return (tmp >> vreg->en) & 1; |
| } |
| |
| static int pcap_regulator_list_voltage(struct regulator_dev *rdev, |
| unsigned int index) |
| { |
| struct pcap_regulator *vreg = &vreg_table[rdev_get_id(rdev)]; |
| |
| return vreg->voltage_table[index] * 1000; |
| } |
| |
| static struct regulator_ops pcap_regulator_ops = { |
| .list_voltage = pcap_regulator_list_voltage, |
| .set_voltage = pcap_regulator_set_voltage, |
| .get_voltage = pcap_regulator_get_voltage, |
| .enable = pcap_regulator_enable, |
| .disable = pcap_regulator_disable, |
| .is_enabled = pcap_regulator_is_enabled, |
| }; |
| |
| #define VREG(_vreg) \ |
| [_vreg] = { \ |
| .name = #_vreg, \ |
| .id = _vreg, \ |
| .n_voltages = ARRAY_SIZE(_vreg##_table), \ |
| .ops = &pcap_regulator_ops, \ |
| .type = REGULATOR_VOLTAGE, \ |
| .owner = THIS_MODULE, \ |
| } |
| |
| static struct regulator_desc pcap_regulators[] = { |
| VREG(V1), VREG(V2), VREG(V3), VREG(V4), VREG(V5), VREG(V6), VREG(V7), |
| VREG(V8), VREG(V9), VREG(V10), VREG(VAUX1), VREG(VAUX2), VREG(VAUX3), |
| VREG(VAUX4), VREG(VSIM), VREG(VSIM2), VREG(VVIB), VREG(SW1), VREG(SW2), |
| }; |
| |
| static int __devinit pcap_regulator_probe(struct platform_device *pdev) |
| { |
| struct regulator_dev *rdev; |
| void *pcap = platform_get_drvdata(pdev); |
| |
| rdev = regulator_register(&pcap_regulators[pdev->id], &pdev->dev, |
| pdev->dev.platform_data, pcap); |
| if (IS_ERR(rdev)) |
| return PTR_ERR(rdev); |
| |
| platform_set_drvdata(pdev, rdev); |
| |
| return 0; |
| } |
| |
| static int __devexit pcap_regulator_remove(struct platform_device *pdev) |
| { |
| struct regulator_dev *rdev = platform_get_drvdata(pdev); |
| |
| regulator_unregister(rdev); |
| |
| return 0; |
| } |
| |
| static struct platform_driver pcap_regulator_driver = { |
| .driver = { |
| .name = "pcap-regulator", |
| }, |
| .probe = pcap_regulator_probe, |
| .remove = __devexit_p(pcap_regulator_remove), |
| }; |
| |
| static int __init pcap_regulator_init(void) |
| { |
| return platform_driver_register(&pcap_regulator_driver); |
| } |
| |
| static void __exit pcap_regulator_exit(void) |
| { |
| platform_driver_unregister(&pcap_regulator_driver); |
| } |
| |
| subsys_initcall(pcap_regulator_init); |
| module_exit(pcap_regulator_exit); |
| |
| MODULE_AUTHOR("Daniel Ribeiro <drwyrm@gmail.com>"); |
| MODULE_DESCRIPTION("PCAP2 Regulator Driver"); |
| MODULE_LICENSE("GPL"); |
