1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (c) 2014 MediaTek Inc. 4 * Author: Flora Fu, MediaTek 5 */ 6 7 #include <linux/interrupt.h> 8 #include <linux/ioport.h> 9 #include <linux/module.h> 10 #include <linux/of_device.h> 11 #include <linux/of_irq.h> 12 #include <linux/regmap.h> 13 #include <linux/mfd/core.h> 14 #include <linux/mfd/mt6323/core.h> 15 #include <linux/mfd/mt6397/core.h> 16 #include <linux/mfd/mt6323/registers.h> 17 #include <linux/mfd/mt6397/registers.h> 18 19 #define MT6323_RTC_BASE 0x8000 20 #define MT6323_RTC_SIZE 0x40 21 22 #define MT6397_RTC_BASE 0xe000 23 #define MT6397_RTC_SIZE 0x3e 24 25 #define MT6323_PWRC_BASE 0x8000 26 #define MT6323_PWRC_SIZE 0x40 27 28 static const struct resource mt6323_rtc_resources[] = { 29 DEFINE_RES_MEM(MT6323_RTC_BASE, MT6323_RTC_SIZE), 30 DEFINE_RES_IRQ(MT6323_IRQ_STATUS_RTC), 31 }; 32 33 static const struct resource mt6397_rtc_resources[] = { 34 DEFINE_RES_MEM(MT6397_RTC_BASE, MT6397_RTC_SIZE), 35 DEFINE_RES_IRQ(MT6397_IRQ_RTC), 36 }; 37 38 static const struct resource mt6323_keys_resources[] = { 39 DEFINE_RES_IRQ(MT6323_IRQ_STATUS_PWRKEY), 40 DEFINE_RES_IRQ(MT6323_IRQ_STATUS_FCHRKEY), 41 }; 42 43 static const struct resource mt6397_keys_resources[] = { 44 DEFINE_RES_IRQ(MT6397_IRQ_PWRKEY), 45 DEFINE_RES_IRQ(MT6397_IRQ_HOMEKEY), 46 }; 47 48 static const struct resource mt6323_pwrc_resources[] = { 49 DEFINE_RES_MEM(MT6323_PWRC_BASE, MT6323_PWRC_SIZE), 50 }; 51 52 static const struct mfd_cell mt6323_devs[] = { 53 { 54 .name = "mt6323-rtc", 55 .num_resources = ARRAY_SIZE(mt6323_rtc_resources), 56 .resources = mt6323_rtc_resources, 57 .of_compatible = "mediatek,mt6323-rtc", 58 }, { 59 .name = "mt6323-regulator", 60 .of_compatible = "mediatek,mt6323-regulator" 61 }, { 62 .name = "mt6323-led", 63 .of_compatible = "mediatek,mt6323-led" 64 }, { 65 .name = "mtk-pmic-keys", 66 .num_resources = ARRAY_SIZE(mt6323_keys_resources), 67 .resources = mt6323_keys_resources, 68 .of_compatible = "mediatek,mt6323-keys" 69 }, { 70 .name = "mt6323-pwrc", 71 .num_resources = ARRAY_SIZE(mt6323_pwrc_resources), 72 .resources = mt6323_pwrc_resources, 73 .of_compatible = "mediatek,mt6323-pwrc" 74 }, 75 }; 76 77 static const struct mfd_cell mt6397_devs[] = { 78 { 79 .name = "mt6397-rtc", 80 .num_resources = ARRAY_SIZE(mt6397_rtc_resources), 81 .resources = mt6397_rtc_resources, 82 .of_compatible = "mediatek,mt6397-rtc", 83 }, { 84 .name = "mt6397-regulator", 85 .of_compatible = "mediatek,mt6397-regulator", 86 }, { 87 .name = "mt6397-codec", 88 .of_compatible = "mediatek,mt6397-codec", 89 }, { 90 .name = "mt6397-clk", 91 .of_compatible = "mediatek,mt6397-clk", 92 }, { 93 .name = "mt6397-pinctrl", 94 .of_compatible = "mediatek,mt6397-pinctrl", 95 }, { 96 .name = "mtk-pmic-keys", 97 .num_resources = ARRAY_SIZE(mt6397_keys_resources), 98 .resources = mt6397_keys_resources, 99 .of_compatible = "mediatek,mt6397-keys" 100 } 101 }; 102 103 #ifdef CONFIG_PM_SLEEP 104 static int mt6397_irq_suspend(struct device *dev) 105 { 106 struct mt6397_chip *chip = dev_get_drvdata(dev); 107 108 regmap_write(chip->regmap, chip->int_con[0], chip->wake_mask[0]); 109 regmap_write(chip->regmap, chip->int_con[1], chip->wake_mask[1]); 110 111 enable_irq_wake(chip->irq); 112 113 return 0; 114 } 115 116 static int mt6397_irq_resume(struct device *dev) 117 { 118 struct mt6397_chip *chip = dev_get_drvdata(dev); 119 120 regmap_write(chip->regmap, chip->int_con[0], chip->irq_masks_cur[0]); 121 regmap_write(chip->regmap, chip->int_con[1], chip->irq_masks_cur[1]); 122 123 disable_irq_wake(chip->irq); 124 125 return 0; 126 } 127 #endif 128 129 static SIMPLE_DEV_PM_OPS(mt6397_pm_ops, mt6397_irq_suspend, 130 mt6397_irq_resume); 131 132 static int mt6397_probe(struct platform_device *pdev) 133 { 134 int ret; 135 unsigned int id; 136 struct mt6397_chip *pmic; 137 138 pmic = devm_kzalloc(&pdev->dev, sizeof(*pmic), GFP_KERNEL); 139 if (!pmic) 140 return -ENOMEM; 141 142 pmic->dev = &pdev->dev; 143 144 /* 145 * mt6397 MFD is child device of soc pmic wrapper. 146 * Regmap is set from its parent. 147 */ 148 pmic->regmap = dev_get_regmap(pdev->dev.parent, NULL); 149 if (!pmic->regmap) 150 return -ENODEV; 151 152 platform_set_drvdata(pdev, pmic); 153 154 ret = regmap_read(pmic->regmap, MT6397_CID, &id); 155 if (ret) { 156 dev_err(pmic->dev, "Failed to read chip id: %d\n", ret); 157 return ret; 158 } 159 160 pmic->irq = platform_get_irq(pdev, 0); 161 if (pmic->irq <= 0) 162 return pmic->irq; 163 164 switch (id & 0xff) { 165 case MT6323_CHIP_ID: 166 pmic->int_con[0] = MT6323_INT_CON0; 167 pmic->int_con[1] = MT6323_INT_CON1; 168 pmic->int_status[0] = MT6323_INT_STATUS0; 169 pmic->int_status[1] = MT6323_INT_STATUS1; 170 ret = mt6397_irq_init(pmic); 171 if (ret) 172 return ret; 173 174 ret = devm_mfd_add_devices(&pdev->dev, -1, mt6323_devs, 175 ARRAY_SIZE(mt6323_devs), NULL, 176 0, pmic->irq_domain); 177 break; 178 179 case MT6391_CHIP_ID: 180 case MT6397_CHIP_ID: 181 pmic->int_con[0] = MT6397_INT_CON0; 182 pmic->int_con[1] = MT6397_INT_CON1; 183 pmic->int_status[0] = MT6397_INT_STATUS0; 184 pmic->int_status[1] = MT6397_INT_STATUS1; 185 ret = mt6397_irq_init(pmic); 186 if (ret) 187 return ret; 188 189 ret = devm_mfd_add_devices(&pdev->dev, -1, mt6397_devs, 190 ARRAY_SIZE(mt6397_devs), NULL, 191 0, pmic->irq_domain); 192 break; 193 194 default: 195 dev_err(&pdev->dev, "unsupported chip: %d\n", id); 196 return -ENODEV; 197 } 198 199 if (ret) { 200 irq_domain_remove(pmic->irq_domain); 201 dev_err(&pdev->dev, "failed to add child devices: %d\n", ret); 202 } 203 204 return ret; 205 } 206 207 static const struct of_device_id mt6397_of_match[] = { 208 { .compatible = "mediatek,mt6397" }, 209 { .compatible = "mediatek,mt6323" }, 210 { } 211 }; 212 MODULE_DEVICE_TABLE(of, mt6397_of_match); 213 214 static const struct platform_device_id mt6397_id[] = { 215 { "mt6397", 0 }, 216 { }, 217 }; 218 MODULE_DEVICE_TABLE(platform, mt6397_id); 219 220 static struct platform_driver mt6397_driver = { 221 .probe = mt6397_probe, 222 .driver = { 223 .name = "mt6397", 224 .of_match_table = of_match_ptr(mt6397_of_match), 225 .pm = &mt6397_pm_ops, 226 }, 227 .id_table = mt6397_id, 228 }; 229 230 module_platform_driver(mt6397_driver); 231 232 MODULE_AUTHOR("Flora Fu, MediaTek"); 233 MODULE_DESCRIPTION("Driver for MediaTek MT6397 PMIC"); 234 MODULE_LICENSE("GPL"); 235