text: // SPDX-License-Identifier: GPL-2.0-only
  /*
   * pmic-cpcap.c - CPCAP-specific functions for the OPP code
   *
   * Adapted from Motorola Mapphone Android Linux kernel
   * Copyright (C) 2011 Motorola, Inc.
   */
  
  #include <linux/err.h>
  #include <linux/io.h>
  #include <linux/kernel.h>
  
  #include "soc.h"
  #include "pm.h"
  #include "voltage.h"
  
  #include <linux/init.h>
  #include "vc.h"
  
  /**
   * omap_cpcap_vsel_to_vdc - convert CPCAP VSEL value to microvolts DC
   * @vsel: CPCAP VSEL value to convert
   *
   * Returns the microvolts DC that the CPCAP PMIC should generate when
   * programmed with @vsel.
   */
  static unsigned long omap_cpcap_vsel_to_uv(unsigned char vsel)
  {
  	if (vsel > 0x44)
  		vsel = 0x44;
  	return (((vsel * 125) + 6000)) * 100;
  }
  
  /**
   * omap_cpcap_uv_to_vsel - convert microvolts DC to CPCAP VSEL value
   * @uv: microvolts DC to convert
   *
   * Returns the VSEL value necessary for the CPCAP PMIC to
   * generate an output voltage equal to or greater than @uv microvolts DC.
   */
  static unsigned char omap_cpcap_uv_to_vsel(unsigned long uv)
  {
  	if (uv < 600000)
  		uv = 600000;
  	else if (uv > 1450000)
  		uv = 1450000;
  	return DIV_ROUND_UP(uv - 600000, 12500);
  }
  
  static struct omap_voltdm_pmic omap_cpcap_core = {
  	.slew_rate = 4000,
  	.step_size = 12500,
  	.vp_erroroffset = OMAP4_VP_CONFIG_ERROROFFSET,
  	.vp_vstepmin = OMAP4_VP_VSTEPMIN_VSTEPMIN,
  	.vp_vstepmax = OMAP4_VP_VSTEPMAX_VSTEPMAX,
  	.vddmin = 900000,
  	.vddmax = 1350000,
  	.vp_timeout_us = OMAP4_VP_VLIMITTO_TIMEOUT_US,
  	.i2c_slave_addr = 0x02,
  	.volt_reg_addr = 0x00,
  	.cmd_reg_addr = 0x01,
  	.i2c_high_speed = false,
  	.vsel_to_uv = omap_cpcap_vsel_to_uv,
  	.uv_to_vsel = omap_cpcap_uv_to_vsel,
  };
  
  static struct omap_voltdm_pmic omap_cpcap_iva = {
  	.slew_rate = 4000,
  	.step_size = 12500,
  	.vp_erroroffset = OMAP4_VP_CONFIG_ERROROFFSET,
  	.vp_vstepmin = OMAP4_VP_VSTEPMIN_VSTEPMIN,
  	.vp_vstepmax = OMAP4_VP_VSTEPMAX_VSTEPMAX,
  	.vddmin = 900000,
  	.vddmax = 1375000,
  	.vp_timeout_us = OMAP4_VP_VLIMITTO_TIMEOUT_US,
  	.i2c_slave_addr = 0x44,
  	.volt_reg_addr = 0x0,
  	.cmd_reg_addr = 0x01,
  	.i2c_high_speed = false,
  	.vsel_to_uv = omap_cpcap_vsel_to_uv,
  	.uv_to_vsel = omap_cpcap_uv_to_vsel,
  };
  
  /**
   * omap_max8952_vsel_to_vdc - convert MAX8952 VSEL value to microvolts DC
   * @vsel: MAX8952 VSEL value to convert
   *
   * Returns the microvolts DC that the MAX8952 Regulator should generate when
   * programmed with @vsel.
   */
  static unsigned long omap_max8952_vsel_to_uv(unsigned char vsel)
  {
  	if (vsel > 0x3F)
  		vsel = 0x3F;
  	return (((vsel * 100) + 7700)) * 100;
  }
  
  /**
   * omap_max8952_uv_to_vsel - convert microvolts DC to MAX8952 VSEL value
   * @uv: microvolts DC to convert
   *
   * Returns the VSEL value necessary for the MAX8952 Regulator to
   * generate an output voltage equal to or greater than @uv microvolts DC.
   */
  static unsigned char omap_max8952_uv_to_vsel(unsigned long uv)
  {
  	if (uv < 770000)
  		uv = 770000;
  	else if (uv > 1400000)
  		uv = 1400000;
  	return DIV_ROUND_UP(uv - 770000, 10000);
  }
  
  static struct omap_voltdm_pmic omap443x_max8952_mpu = {
  	.slew_rate = 16000,
  	.step_size = 10000,
  	.vp_erroroffset = OMAP4_VP_CONFIG_ERROROFFSET,
  	.vp_vstepmin = OMAP4_VP_VSTEPMIN_VSTEPMIN,
  	.vp_vstepmax = OMAP4_VP_VSTEPMAX_VSTEPMAX,
  	.vddmin = 900000,
  	.vddmax = 1400000,
  	.vp_timeout_us = OMAP4_VP_VLIMITTO_TIMEOUT_US,
  	.i2c_slave_addr = 0x60,
  	.volt_reg_addr = 0x03,
  	.cmd_reg_addr = 0x03,
  	.i2c_high_speed = false,
  	.vsel_to_uv = omap_max8952_vsel_to_uv,
  	.uv_to_vsel = omap_max8952_uv_to_vsel,
  };
  
  /**
   * omap_fan5355_vsel_to_vdc - convert FAN535503 VSEL value to microvolts DC
   * @vsel: FAN535503 VSEL value to convert
   *
   * Returns the microvolts DC that the FAN535503 Regulator should generate when
   * programmed with @vsel.
   */
  static unsigned long omap_fan535503_vsel_to_uv(unsigned char vsel)
  {
  	/* Extract bits[5:0] */
  	vsel &= 0x3F;
  
  	return (((vsel * 125) + 7500)) * 100;
  }
  
  /**
   * omap_fan535508_vsel_to_vdc - convert FAN535508 VSEL value to microvolts DC
   * @vsel: FAN535508 VSEL value to convert
   *
   * Returns the microvolts DC that the FAN535508 Regulator should generate when
   * programmed with @vsel.
   */
  static unsigned long omap_fan535508_vsel_to_uv(unsigned char vsel)
  {
  	/* Extract bits[5:0] */
  	vsel &= 0x3F;
  
  	if (vsel > 0x37)
  		vsel = 0x37;
  	return (((vsel * 125) + 7500)) * 100;
  }
  
  
  /**
   * omap_fan535503_uv_to_vsel - convert microvolts DC to FAN535503 VSEL value
   * @uv: microvolts DC to convert
   *
   * Returns the VSEL value necessary for the MAX8952 Regulator to
   * generate an output voltage equal to or greater than @uv microvolts DC.
   */
  static unsigned char omap_fan535503_uv_to_vsel(unsigned long uv)
  {
  	unsigned char vsel;
  	if (uv < 750000)
  		uv = 750000;
  	else if (uv > 1537500)
  		uv = 1537500;
  
  	vsel = DIV_ROUND_UP(uv - 750000, 12500);
  	return vsel | 0xC0;
  }
  
  /**
   * omap_fan535508_uv_to_vsel - convert microvolts DC to FAN535508 VSEL value
   * @uv: microvolts DC to convert
   *
   * Returns the VSEL value necessary for the MAX8952 Regulator to
   * generate an output voltage equal to or greater than @uv microvolts DC.
   */
  static unsigned char omap_fan535508_uv_to_vsel(unsigned long uv)
  {
  	unsigned char vsel;
  	if (uv < 750000)
  		uv = 750000;
  	else if (uv > 1437500)
  		uv = 1437500;
  
  	vsel = DIV_ROUND_UP(uv - 750000, 12500);
  	return vsel | 0xC0;
  }
  
  /* fan5335-core */
  static struct omap_voltdm_pmic omap4_fan_core = {
  	.slew_rate = 4000,
  	.step_size = 12500,
  	.vp_erroroffset = OMAP4_VP_CONFIG_ERROROFFSET,
  	.vp_vstepmin = OMAP4_VP_VSTEPMIN_VSTEPMIN,
  	.vp_vstepmax = OMAP4_VP_VSTEPMAX_VSTEPMAX,
  	.vddmin = 850000,
  	.vddmax = 1375000,
  	.vp_timeout_us = OMAP4_VP_VLIMITTO_TIMEOUT_US,
  	.i2c_slave_addr = 0x4A,
  	.i2c_high_speed = false,
  	.volt_reg_addr = 0x01,
  	.cmd_reg_addr = 0x01,
  	.vsel_to_uv = omap_fan535508_vsel_to_uv,
  	.uv_to_vsel = omap_fan535508_uv_to_vsel,
  };
  
  /* fan5335 iva */
  static struct omap_voltdm_pmic omap4_fan_iva = {
  	.slew_rate = 4000,
  	.step_size = 12500,
  	.vp_erroroffset = OMAP4_VP_CONFIG_ERROROFFSET,
  	.vp_vstepmin = OMAP4_VP_VSTEPMIN_VSTEPMIN,
  	.vp_vstepmax = OMAP4_VP_VSTEPMAX_VSTEPMAX,
  	.vddmin = 850000,
  	.vddmax = 1375000,
  	.vp_timeout_us = OMAP4_VP_VLIMITTO_TIMEOUT_US,
  	.i2c_slave_addr = 0x48,
  	.volt_reg_addr = 0x01,
  	.cmd_reg_addr = 0x01,
  	.i2c_high_speed = false,
  	.vsel_to_uv = omap_fan535503_vsel_to_uv,
  	.uv_to_vsel = omap_fan535503_uv_to_vsel,
  };
  
  int __init omap4_cpcap_init(void)
  {
  	struct voltagedomain *voltdm;
  
  	if (!of_find_compatible_node(NULL, NULL, "motorola,cpcap"))
  		return -ENODEV;
  
  	voltdm = voltdm_lookup("mpu");
  	omap_voltage_register_pmic(voltdm, &omap443x_max8952_mpu);
  
  	if (of_machine_is_compatible("motorola,droid-bionic")) {
  		voltdm = voltdm_lookup("core");
  		omap_voltage_register_pmic(voltdm, &omap_cpcap_core);
  
  		voltdm = voltdm_lookup("iva");
  		omap_voltage_register_pmic(voltdm, &omap_cpcap_iva);
  	} else {
  		voltdm = voltdm_lookup("core");
  		omap_voltage_register_pmic(voltdm, &omap4_fan_core);
  
  		voltdm = voltdm_lookup("iva");
  		omap_voltage_register_pmic(voltdm, &omap4_fan_iva);
  	}
  
  	return 0;
  }
  
  static int __init cpcap_late_init(void)
  {
  	omap4_vc_set_pmic_signaling(PWRDM_POWER_RET);
  
  	return 0;
  }
  omap_late_initcall(cpcap_late_init);
  