mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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7397daf102
The late init call just writes to omap4 registers as soon as
CONFIG_MFD_CPCAP is enabled without checking whether the
cpcap driver is actually there or the SoC is indeed an
OMAP4.
Rather do these things only with the right device combination.
Fixes booting the BT200 with said configuration enabled and non-factory
X-Loader and probably also some surprising behavior on other devices.
Fixes: c145649bf2 ("ARM: OMAP2+: Configure voltage controller for cpcap to low-speed")
CC: stable@vger.kernel.org
Signed-off-by: Andreas Kemnade <andreas@kemnade.info>
Reivewed-by: Tony Lindgren <tony@atomide.com>
Link: https://lore.kernel.org/r/20250331144439.769697-1-andreas@kemnade.info
Signed-off-by: Kevin Hilman <khilman@baylibre.com>
275 lines
7.1 KiB
C
275 lines
7.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* pmic-cpcap.c - CPCAP-specific functions for the OPP code
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*
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* Adapted from Motorola Mapphone Android Linux kernel
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* Copyright (C) 2011 Motorola, Inc.
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*/
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#include <linux/err.h>
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#include <linux/io.h>
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#include <linux/kernel.h>
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#include "soc.h"
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#include "pm.h"
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#include "voltage.h"
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#include <linux/init.h>
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#include "vc.h"
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/**
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* omap_cpcap_vsel_to_uv - convert CPCAP VSEL value to microvolts DC
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* @vsel: CPCAP VSEL value to convert
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*
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* Returns: the microvolts DC that the CPCAP PMIC should generate when
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* programmed with @vsel.
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*/
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static unsigned long omap_cpcap_vsel_to_uv(unsigned char vsel)
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{
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if (vsel > 0x44)
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vsel = 0x44;
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return (((vsel * 125) + 6000)) * 100;
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}
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/**
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* omap_cpcap_uv_to_vsel - convert microvolts DC to CPCAP VSEL value
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* @uv: microvolts DC to convert
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*
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* Returns: the VSEL value necessary for the CPCAP PMIC to
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* generate an output voltage equal to or greater than @uv microvolts DC.
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*/
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static unsigned char omap_cpcap_uv_to_vsel(unsigned long uv)
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{
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if (uv < 600000)
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uv = 600000;
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else if (uv > 1450000)
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uv = 1450000;
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return DIV_ROUND_UP(uv - 600000, 12500);
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}
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static struct omap_voltdm_pmic omap_cpcap_core = {
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.slew_rate = 4000,
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.step_size = 12500,
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.vp_erroroffset = OMAP4_VP_CONFIG_ERROROFFSET,
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.vp_vstepmin = OMAP4_VP_VSTEPMIN_VSTEPMIN,
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.vp_vstepmax = OMAP4_VP_VSTEPMAX_VSTEPMAX,
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.vddmin = 900000,
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.vddmax = 1350000,
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.vp_timeout_us = OMAP4_VP_VLIMITTO_TIMEOUT_US,
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.i2c_slave_addr = 0x02,
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.volt_reg_addr = 0x00,
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.cmd_reg_addr = 0x01,
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.i2c_high_speed = false,
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.vsel_to_uv = omap_cpcap_vsel_to_uv,
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.uv_to_vsel = omap_cpcap_uv_to_vsel,
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};
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static struct omap_voltdm_pmic omap_cpcap_iva = {
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.slew_rate = 4000,
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.step_size = 12500,
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.vp_erroroffset = OMAP4_VP_CONFIG_ERROROFFSET,
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.vp_vstepmin = OMAP4_VP_VSTEPMIN_VSTEPMIN,
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.vp_vstepmax = OMAP4_VP_VSTEPMAX_VSTEPMAX,
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.vddmin = 900000,
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.vddmax = 1375000,
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.vp_timeout_us = OMAP4_VP_VLIMITTO_TIMEOUT_US,
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.i2c_slave_addr = 0x44,
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.volt_reg_addr = 0x0,
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.cmd_reg_addr = 0x01,
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.i2c_high_speed = false,
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.vsel_to_uv = omap_cpcap_vsel_to_uv,
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.uv_to_vsel = omap_cpcap_uv_to_vsel,
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};
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/**
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* omap_max8952_vsel_to_uv - convert MAX8952 VSEL value to microvolts DC
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* @vsel: MAX8952 VSEL value to convert
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*
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* Returns: the microvolts DC that the MAX8952 Regulator should generate when
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* programmed with @vsel.
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*/
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static unsigned long omap_max8952_vsel_to_uv(unsigned char vsel)
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{
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if (vsel > 0x3F)
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vsel = 0x3F;
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return (((vsel * 100) + 7700)) * 100;
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}
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/**
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* omap_max8952_uv_to_vsel - convert microvolts DC to MAX8952 VSEL value
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* @uv: microvolts DC to convert
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*
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* Returns: the VSEL value necessary for the MAX8952 Regulator to
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* generate an output voltage equal to or greater than @uv microvolts DC.
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*/
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static unsigned char omap_max8952_uv_to_vsel(unsigned long uv)
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{
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if (uv < 770000)
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uv = 770000;
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else if (uv > 1400000)
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uv = 1400000;
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return DIV_ROUND_UP(uv - 770000, 10000);
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}
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static struct omap_voltdm_pmic omap443x_max8952_mpu = {
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.slew_rate = 16000,
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.step_size = 10000,
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.vp_erroroffset = OMAP4_VP_CONFIG_ERROROFFSET,
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.vp_vstepmin = OMAP4_VP_VSTEPMIN_VSTEPMIN,
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.vp_vstepmax = OMAP4_VP_VSTEPMAX_VSTEPMAX,
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.vddmin = 900000,
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.vddmax = 1400000,
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.vp_timeout_us = OMAP4_VP_VLIMITTO_TIMEOUT_US,
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.i2c_slave_addr = 0x60,
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.volt_reg_addr = 0x03,
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.cmd_reg_addr = 0x03,
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.i2c_high_speed = false,
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.vsel_to_uv = omap_max8952_vsel_to_uv,
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.uv_to_vsel = omap_max8952_uv_to_vsel,
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};
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/**
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* omap_fan535503_vsel_to_uv - convert FAN535503 VSEL value to microvolts DC
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* @vsel: FAN535503 VSEL value to convert
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*
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* Returns: the microvolts DC that the FAN535503 Regulator should generate when
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* programmed with @vsel.
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*/
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static unsigned long omap_fan535503_vsel_to_uv(unsigned char vsel)
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{
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/* Extract bits[5:0] */
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vsel &= 0x3F;
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return (((vsel * 125) + 7500)) * 100;
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}
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/**
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* omap_fan535508_vsel_to_uv - convert FAN535508 VSEL value to microvolts DC
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* @vsel: FAN535508 VSEL value to convert
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*
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* Returns: the microvolts DC that the FAN535508 Regulator should generate when
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* programmed with @vsel.
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*/
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static unsigned long omap_fan535508_vsel_to_uv(unsigned char vsel)
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{
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/* Extract bits[5:0] */
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vsel &= 0x3F;
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if (vsel > 0x37)
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vsel = 0x37;
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return (((vsel * 125) + 7500)) * 100;
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}
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/**
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* omap_fan535503_uv_to_vsel - convert microvolts DC to FAN535503 VSEL value
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* @uv: microvolts DC to convert
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*
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* Returns: the VSEL value necessary for the MAX8952 Regulator to
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* generate an output voltage equal to or greater than @uv microvolts DC.
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*/
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static unsigned char omap_fan535503_uv_to_vsel(unsigned long uv)
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{
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unsigned char vsel;
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if (uv < 750000)
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uv = 750000;
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else if (uv > 1537500)
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uv = 1537500;
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vsel = DIV_ROUND_UP(uv - 750000, 12500);
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return vsel | 0xC0;
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}
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/**
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* omap_fan535508_uv_to_vsel - convert microvolts DC to FAN535508 VSEL value
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* @uv: microvolts DC to convert
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*
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* Returns: the VSEL value necessary for the MAX8952 Regulator to
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* generate an output voltage equal to or greater than @uv microvolts DC.
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*/
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static unsigned char omap_fan535508_uv_to_vsel(unsigned long uv)
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{
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unsigned char vsel;
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if (uv < 750000)
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uv = 750000;
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else if (uv > 1437500)
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uv = 1437500;
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vsel = DIV_ROUND_UP(uv - 750000, 12500);
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return vsel | 0xC0;
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}
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/* fan5335-core */
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static struct omap_voltdm_pmic omap4_fan_core = {
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.slew_rate = 4000,
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.step_size = 12500,
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.vp_erroroffset = OMAP4_VP_CONFIG_ERROROFFSET,
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.vp_vstepmin = OMAP4_VP_VSTEPMIN_VSTEPMIN,
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.vp_vstepmax = OMAP4_VP_VSTEPMAX_VSTEPMAX,
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.vddmin = 850000,
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.vddmax = 1375000,
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.vp_timeout_us = OMAP4_VP_VLIMITTO_TIMEOUT_US,
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.i2c_slave_addr = 0x4A,
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.i2c_high_speed = false,
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.volt_reg_addr = 0x01,
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.cmd_reg_addr = 0x01,
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.vsel_to_uv = omap_fan535508_vsel_to_uv,
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.uv_to_vsel = omap_fan535508_uv_to_vsel,
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};
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/* fan5335 iva */
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static struct omap_voltdm_pmic omap4_fan_iva = {
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.slew_rate = 4000,
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.step_size = 12500,
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.vp_erroroffset = OMAP4_VP_CONFIG_ERROROFFSET,
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.vp_vstepmin = OMAP4_VP_VSTEPMIN_VSTEPMIN,
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.vp_vstepmax = OMAP4_VP_VSTEPMAX_VSTEPMAX,
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.vddmin = 850000,
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.vddmax = 1375000,
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.vp_timeout_us = OMAP4_VP_VLIMITTO_TIMEOUT_US,
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.i2c_slave_addr = 0x48,
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.volt_reg_addr = 0x01,
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.cmd_reg_addr = 0x01,
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.i2c_high_speed = false,
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.vsel_to_uv = omap_fan535503_vsel_to_uv,
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.uv_to_vsel = omap_fan535503_uv_to_vsel,
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};
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int __init omap4_cpcap_init(void)
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{
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struct voltagedomain *voltdm;
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if (!of_find_compatible_node(NULL, NULL, "motorola,cpcap"))
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return -ENODEV;
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voltdm = voltdm_lookup("mpu");
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omap_voltage_register_pmic(voltdm, &omap443x_max8952_mpu);
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if (of_machine_is_compatible("motorola,droid-bionic")) {
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voltdm = voltdm_lookup("core");
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omap_voltage_register_pmic(voltdm, &omap_cpcap_core);
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voltdm = voltdm_lookup("iva");
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omap_voltage_register_pmic(voltdm, &omap_cpcap_iva);
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} else {
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voltdm = voltdm_lookup("core");
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omap_voltage_register_pmic(voltdm, &omap4_fan_core);
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voltdm = voltdm_lookup("iva");
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omap_voltage_register_pmic(voltdm, &omap4_fan_iva);
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}
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return 0;
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}
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static int __init cpcap_late_init(void)
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{
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if (!of_find_compatible_node(NULL, NULL, "motorola,cpcap"))
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return 0;
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if (soc_is_omap443x() || soc_is_omap446x() || soc_is_omap447x())
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omap4_vc_set_pmic_signaling(PWRDM_POWER_RET);
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return 0;
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}
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omap_late_initcall(cpcap_late_init);
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