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regulator: k5.15 common driver bringup patches [1/1]

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PD#SWPL-135783

Problem:
1. need use regulator to delay dvfs voltage set;
2. for boot to kernel vddcpu/vddee voltage
change to max problem;

Solution:
1. add dvfs delay time at s7 pxp;
2. add init voltage at txhd2 trunk;

Verify:
build pass

Change-Id: I877e9affaced264b57c887c05f4545ad22816789
Signed-off-by: chengbing.wu <chengbing.wu@amlogic.com>
This commit is contained in:
chengbing.wu
2023-06-08 14:18:31 +08:00
committed by Dongjin Kim
parent 87deba4d19
commit 86c1467dbe
2 changed files with 58 additions and 0 deletions
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10
drivers/regulator/Kconfig
View File

@@ -916,6 +916,16 @@ config REGULATOR_PWM
This driver supports PWM controlled voltage regulators. PWM
duty cycle can increase or decrease the voltage.
config AMLOGIC_PWM_REGULATOR
bool "PWM voltage regulator for AMLOGIC define"
depends on REGULATOR_PWM
default n if REGULATOR_PWM
help
This driver supports some feature of PWM regulators.
such as:
1. need use regulator to delay dvfs voltage setting;
2. deal with problem of voltage by changed to max booting to kernel;
config REGULATOR_QCOM_RPM
tristate "Qualcomm RPM regulator driver"
depends on MFD_QCOM_RPM

48
drivers/regulator/pwm-regulator.c
View File

@@ -18,6 +18,12 @@
#include <linux/pwm.h>
#include <linux/gpio/consumer.h>
#ifdef CONFIG_AMLOGIC_PWM_REGULATOR
#include <linux/delay.h>
#define USLEEP_TIME 200
int usleep_time;
#endif
struct pwm_continuous_reg_data {
unsigned int min_uV_dutycycle;
unsigned int max_uV_dutycycle;
@@ -51,6 +57,35 @@ struct pwm_voltages {
/*
* Voltage table call-backs
*/
#ifdef CONFIG_AMLOGIC_PWM_REGULATOR
static void pwm_regulator_init_state(struct regulator_dev *rdev)
{
struct pwm_regulator_data *drvdata = rdev_get_drvdata(rdev);
struct pwm_state pwm_state;
unsigned int dutycycle;
int i;
pwm_get_state(drvdata->pwm, &pwm_state);
dutycycle = pwm_get_relative_duty_cycle(&pwm_state, 100);
pr_debug("[%s] Default drvdata->state: %d\n", __func__, drvdata->state);
for (i = 0; i < rdev->desc->n_voltages; i++) {
pr_debug("[%s] i:%d n_voltages:%d, dutycycle:%d = [i].dutycycle:%d\n",
__func__, i, rdev->desc->n_voltages, dutycycle,
drvdata->duty_cycle_table[i].dutycycle);
if (dutycycle == drvdata->duty_cycle_table[i].dutycycle) {
drvdata->state = i;
pr_info("[%s] Get return == i: %d\n", __func__, drvdata->state);
return;
} else if (dutycycle < drvdata->duty_cycle_table[i].dutycycle) {
drvdata->state = i - 1;
pr_info("[%s] Get return < i-1:%d\n", __func__, drvdata->state);
return;
}
}
pr_info("[%s] Get drvdata->state: %d\n", __func__, drvdata->state);
}
#else /* CONFIG_AMLOGIC_PWM_REGULATOR */
static void pwm_regulator_init_state(struct regulator_dev *rdev)
{
struct pwm_regulator_data *drvdata = rdev_get_drvdata(rdev);
@@ -68,6 +103,7 @@ static void pwm_regulator_init_state(struct regulator_dev *rdev)
}
}
}
#endif /* CONFIG_AMLOGIC_PWM_REGULATOR */
static int pwm_regulator_get_voltage_sel(struct regulator_dev *rdev)
{
@@ -98,6 +134,11 @@ static int pwm_regulator_set_voltage_sel(struct regulator_dev *rdev,
drvdata->state = selector;
#ifdef CONFIG_AMLOGIC_PWM_REGULATOR
if (drvdata->desc.vsel_step)
usleep_range(usleep_time - 10, usleep_time);
#endif
return 0;
}
@@ -287,6 +328,13 @@ static int pwm_regulator_init_table(struct platform_device *pdev,
drvdata->desc.ops = &pwm_regulator_voltage_table_ops;
drvdata->desc.n_voltages = length / sizeof(*duty_cycle_table);
#ifdef CONFIG_AMLOGIC_PWM_REGULATOR
of_property_read_u32(np, "amlogic,vsel-step", &drvdata->desc.vsel_step);
ret = of_property_read_u32(np, "amlogic,usleep-time", &usleep_time);
if (ret || usleep_time < 10)
usleep_time = USLEEP_TIME;
#endif
return 0;
}