1 // SPDX-License-Identifier: GPL-2.0-only 2 // Copyright (c) 2025, Qualcomm Technologies, Inc. and/or its subsidiaries. 3 4 #include <linux/export.h> 5 #include <linux/module.h> 6 #include <linux/init.h> 7 #include <linux/device.h> 8 #include <linux/of.h> 9 #include <linux/printk.h> 10 #include <linux/component.h> 11 #include <linux/pm_runtime.h> 12 13 #include "wcd-common.h" 14 15 #define WCD_MIN_MICBIAS_MV 1000 16 #define WCD_DEF_MICBIAS_MV 1800 17 #define WCD_MAX_MICBIAS_MV 2850 18 19 int wcd_get_micb_vout_ctl_val(struct device *dev, u32 micb_mv) 20 { 21 /* min micbias voltage is 1V and maximum is 2.85V */ 22 if (micb_mv < WCD_MIN_MICBIAS_MV || micb_mv > WCD_MAX_MICBIAS_MV) { 23 dev_err(dev, "Unsupported micbias voltage (%u mV)\n", micb_mv); 24 return -EINVAL; 25 } 26 27 return (micb_mv - WCD_MIN_MICBIAS_MV) / 50; 28 } 29 EXPORT_SYMBOL_GPL(wcd_get_micb_vout_ctl_val); 30 31 static int wcd_get_micbias_val(struct device *dev, int micb_num, u32 *micb_mv) 32 { 33 char micbias[64]; 34 int mv; 35 36 sprintf(micbias, "qcom,micbias%d-microvolt", micb_num); 37 38 if (of_property_read_u32(dev->of_node, micbias, &mv)) { 39 dev_err(dev, "%s value not found, using default\n", micbias); 40 mv = WCD_DEF_MICBIAS_MV; 41 } else { 42 /* convert it to milli volts */ 43 mv = mv/1000; 44 } 45 if (micb_mv) 46 *micb_mv = mv; 47 48 mv = wcd_get_micb_vout_ctl_val(dev, mv); 49 if (mv < 0) { 50 dev_err(dev, "Unsupported %s voltage (%d mV), falling back to default (%d mV)\n", 51 micbias, mv, WCD_DEF_MICBIAS_MV); 52 return wcd_get_micb_vout_ctl_val(dev, WCD_DEF_MICBIAS_MV); 53 } 54 55 return mv; 56 } 57 58 int wcd_dt_parse_micbias_info(struct wcd_common *common) 59 { 60 int i; 61 62 for (i = 0; i < common->max_bias; i++) { 63 common->micb_vout[i] = wcd_get_micbias_val(common->dev, i + 1, &common->micb_mv[i]); 64 if (common->micb_vout[i] < 0) 65 return -EINVAL; 66 } 67 68 return 0; 69 } 70 EXPORT_SYMBOL_GPL(wcd_dt_parse_micbias_info); 71 72 static int wcd_sdw_component_bind(struct device *dev, struct device *master, void *data) 73 { 74 pm_runtime_set_autosuspend_delay(dev, 3000); 75 pm_runtime_use_autosuspend(dev); 76 pm_runtime_mark_last_busy(dev); 77 pm_runtime_set_active(dev); 78 pm_runtime_enable(dev); 79 80 return 0; 81 } 82 83 static void wcd_sdw_component_unbind(struct device *dev, struct device *master, void *data) 84 { 85 pm_runtime_disable(dev); 86 pm_runtime_set_suspended(dev); 87 pm_runtime_dont_use_autosuspend(dev); 88 } 89 90 const struct component_ops wcd_sdw_component_ops = { 91 .bind = wcd_sdw_component_bind, 92 .unbind = wcd_sdw_component_unbind, 93 }; 94 EXPORT_SYMBOL_GPL(wcd_sdw_component_ops); 95 96 MODULE_DESCRIPTION("Common Qualcomm WCD Codec helpers driver"); 97 MODULE_LICENSE("GPL"); 98