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rt-thread-official/bsp/stm32/stm32mp157a-st-discovery/board/ports/drv_pmic.c

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/*
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* Copyright (c) 2006-2021, RT-Thread Development Team
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*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2020-06-18 thread-liu the first version
*/
#include <board.h>
#if defined(BSP_USING_PMIC)
#include <drv_pmic.h>
#include <string.h>
//#define DRV_DEBUG
#define LOG_TAG "drv.pmic"
#include <drv_log.h>
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#define I2C_NAME "i2c3"
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static struct rt_i2c_bus_device *pmic_dev = RT_NULL;
/* i2c read reg */
static rt_err_t read_reg(struct rt_i2c_bus_device *bus, rt_uint8_t reg, rt_uint8_t len, rt_uint8_t *buf)
{
struct rt_i2c_msg msg[2] = {0, 0};
RT_ASSERT(bus != RT_NULL);
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msg[0].addr = STPMU1_I2C_ADDRESS; /* Slave address */
msg[0].flags = RT_I2C_WR; /* Write flag */
msg[0].buf = &reg; /* Slave register address */
msg[0].len = 1; /* Number of bytes sent */
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msg[1].addr = STPMU1_I2C_ADDRESS;
msg[1].flags = RT_I2C_RD;
msg[1].len = len;
msg[1].buf = buf;
if (rt_i2c_transfer(bus, msg, 2) == 2)
{
return RT_EOK;
}
return RT_ERROR;
}
/* i2c write reg */
static rt_err_t write_reg(struct rt_i2c_bus_device *bus, rt_uint8_t reg, rt_uint8_t data)
{
rt_uint8_t buf[2];
struct rt_i2c_msg msgs;
RT_ASSERT(bus != RT_NULL);
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buf[0] = reg; //cmd
buf[1] = data;
msgs.addr = STPMU1_I2C_ADDRESS;
msgs.flags = RT_I2C_WR;
msgs.buf = buf;
msgs.len = 2;
if (rt_i2c_transfer(bus, &msgs, 1) == 1)
{
return RT_EOK;
}
return RT_ERROR;
}
/* register direct access */
static rt_err_t stpmu1_read_reg(uint8_t register_id)
{
rt_err_t status = RT_EOK;
uint8_t result = 0;
status = read_reg(pmic_dev, register_id, 1, &result);
/* Check the communication status */
if(status != RT_EOK)
{
Error_Handler();
}
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return result;
}
static void stpmu1_write_reg(uint8_t register_id, uint8_t value)
{
uint32_t status = RT_EOK;
uint8_t readval = 0;
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status = write_reg(pmic_dev, register_id, (rt_uint8_t)value);
/* Check the communication status */
if(status != RT_EOK)
{
Error_Handler();
}
/* verify register content */
if ((register_id != WATCHDOG_CONTROL_REG) && (register_id <= 0x40))
{
readval = stpmu1_read_reg(register_id);
if (readval != value)
{
Error_Handler();
}
}
}
/** PMIC init */
static uint32_t BSP_PMIC_MspInit(void)
{
GPIO_InitTypeDef GPIO_InitStruct = {0};
__HAL_RCC_GPIOA_CLK_ENABLE();
GPIO_InitStruct.Pin = GPIO_PIN_0;
GPIO_InitStruct.Mode = GPIO_MODE_IT_FALLING;
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GPIO_InitStruct.Pull = GPIO_PULLUP;
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GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
GPIO_InitStruct.Alternate = 0 ;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
HAL_NVIC_SetPriority(EXTI0_IRQn, 0x03, 0x00);
HAL_NVIC_EnableIRQ(EXTI0_IRQn);
return RT_EOK;
}
static uint32_t BSP_PMIC_MspDeInit(void)
{
__HAL_RCC_GPIOA_CLK_DISABLE();
HAL_NVIC_DisableIRQ(EXTI0_IRQn);
HAL_GPIO_DeInit(GPIOA,GPIO_PIN_0);
return RT_EOK;
}
uint16_t buck1_voltage_table[] = {
600,
625,
650,
675,
700,
725,
750,
775,
800,
825,
850,
875,
900,
925,
950,
975,
1000,
1025,
1050,
1075,
1100,
1125,
1150,
1175,
1200,
1225,
1250,
1275,
1300,
1325,
1350,
1350,// 31 1,35
};
uint16_t buck2_voltage_table[] = {
1000, // 1
1000, //
1000, // 1
1000, // 1
1000, // 1
1000, // 1
1000, // 1
1000, // 1
1000, // 1
1000, // 1
1000, // 1
1000, // 1
1000, // 1
1000, // 1
1000, // 1
1000, // 1
1000, // 1
1000, // 1
1050, // 1,05
1050, // 1,05
1100, // 1,1
1100, // 1,1
1150, // 1,15
1150, // 1,15
1200, // 1,2
1200, // 1,2
1250, // 1,25
1250, // 1,25
1300, // 1,3
1300, // 1,3
1350, // 1,35
1350, // 1,35
1400, // 1,4
1400, // 1,4
1450, // 1,45
1450, // 1,45
1500, // 1,5
};
uint16_t buck3_voltage_table[] = {
1000, // 1
1000, // 1
1000, // 1
1000, // 1
1000, // 1
1000, // 1
1000, // 1
1000, // 1
1000, // 1
1000, // 1
1000, // 1
1000, // 1
1000, // 1
1000, // 1
1000, // 1
1000, // 1
1000, // 1
1000, // 1
1000, // 1
1000, // 1
1100, // 1,1
1100, // 1,1
1100, // 1,1
1100, // 1,1
1200, // 1,2
1200, // 1,2
1200, // 1,2
1200, // 1,2
1300, // 1,3
1300, // 1,3
1300, // 1,3
1300, // 1,3
1400, // 1,4
1400, // 1,4
1400, // 1,4
1400, // 1,4
1500, // 1,5
1600, // 1,6
1700, // 1,7
1800, // 1,8
1900, // 1,9
2000, // 2
2100, // 2,1
2200, // 2,2
2300, // 2,3
2400, // 2,4
2500, // 2,5
2600, // 2,6
2700, // 2,7
2800, // 2,8
2900, // 2,9
3000, // 3
3100, // 3,1
3200, // 3,2
3300, // 3,3
3400, // 3,4
};
uint16_t buck4_voltage_table[] = {
600,
625,
650,
675,
700,
725,
750,
775,
800,
825,
850,
875,
900,
925,
950,
975,
1000,
1025,
1050,
1075,
1100,
1125,
1150,
1175,
1200,
1225,
1250,
1275,
1300,
1300,
1350,
1350,// 31 1,35
1400,// 32 1,40
1400,// 33 1,40
1450,// 34 1,45
1450,// 35 1,45
1500,// 36 1,5
1600,// 37 1,6
1700,// 38 1,7
1800,// 39 1,8
1900,// 40 1,9
2000,// 41 2,0
2100,// 42 2,1
2200,// 43 2,2
2300,// 44 2,3
2400,// 45 2,4
2500,// 46 2,5
2600,// 47 2,6
2700,// 48 2,7
2800,// 49 2,8
2900,// 50 2,9
3000,// 51 3,0
3100,// 52 3,1
3200,// 53 3,2
3300,// 54 3,3
3400,// 55 3,4
3500,// 56 3,5
3600,// 57 3,6
3700,// 58 3,7
3800,// 59 3,8
3900,// 60 3,9
};
uint16_t ldo1_voltage_table[] = {
1700, // 1,7
1700, // 1,7
1700, // 1,7
1700, // 1,7
1700, // 1,7
1700, // 1,7
1700, // 1,7
1700, // 1,7
1700, // 1,7
1800, // 1,8
1900, // 1,9
2000, // 2
2100, // 2,1
2200, // 2,2
2300, // 2,3
2400, // 2,4
2500, // 2,5
2600, // 2,6
2700, // 2,7
2800, // 2,8
2900, // 2,9
3000, // 3
3100, // 3,1
3200, // 3,2
3300, // 3,3
};
uint16_t ldo2_voltage_table[] = {
1700, // 1,7
1700, // 1,7
1700, // 1,7
1700, // 1,7
1700, // 1,7
1700, // 1,7
1700, // 1,7
1700, // 1,7
1700, // 1,7
1800, // 1,8
1900, // 1,9
2000, // 2
2100, // 2,1
2200, // 2,2
2300, // 2,3
2400, // 2,4
2500, // 2,5
2600, // 2,6
2700, // 2,7
2800, // 2,8
2900, // 2,9
3000, // 3
3100, // 3,1
3200, // 3,2
3300, // 3,3
};
uint16_t ldo3_voltage_table[] = {
1700, // 1,7
1700, // 1,7
1700, // 1,7
1700, // 1,7
1700, // 1,7
1700, // 1,7
1700, // 1,7
1700, // 1,7
1700, // 1,7
1800, // 1,8
1900, // 1,9
2000, // 2
2100, // 2,1
2200, // 2,2
2300, // 2,3
2400, // 2,4
2500, // 2,5
2600, // 2,6
2700, // 2,7
2800, // 2,8
2900, // 2,9
3000, // 3
3100, // 3,1
3200, // 3,2
3300, // 3,3
3300, // 3,3
3300, // 3,3
3300, // 3,3
3300, // 3,3
3300, // 3,3
3300, // 3,3
0xFFFF, // VREFDDR
};
uint16_t ldo5_voltage_table[] = {
1700, // 1,7
1700, // 1,7
1700, // 1,7
1700, // 1,7
1700, // 1,7
1700, // 1,7
1700, // 1,7
1700, // 1,7
1700, // 1,7
1800, // 1,8
1900, // 1,9
2000, // 2
2100, // 2,1
2200, // 2,2
2300, // 2,3
2400, // 2,4
2500, // 2,5
2600, // 2,6
2700, // 2,7
2800, // 2,8
2900, // 2,9
3000, // 3
3100, // 3,1
3200, // 3,2
3300, // 3,3
3400, // 3,4
3500, // 3,5
3600, // 3,6
3700, // 3,7
3800, // 3,8
3900, // 3,9
};
uint16_t ldo6_voltage_table[] = {
900, // 0,9
1000, // 1,0
1100, // 1,1
1200, // 1,2
1300, // 1,3
1400, // 1,4
1500, // 1,5
1600, // 1,6
1700, // 1,7
1800, // 1,8
1900, // 1,9
2000, // 2
2100, // 2,1
2200, // 2,2
2300, // 2,3
2400, // 2,4
2500, // 2,5
2600, // 2,6
2700, // 2,7
2800, // 2,8
2900, // 2,9
3000, // 3
3100, // 3,1
3200, // 3,2
3300, // 3,3
};
uint16_t ldo4_voltage_table[] = {
3300, // 3,3
};
uint16_t vref_ddr_voltage_table[] = {
3300, // 3,3
};
/*
Table of Regulators in PMIC SoC
*/
static regul_struct regulators_table[] = {
{
.id = STPMU1_BUCK1,
.voltage_table = buck1_voltage_table,
.voltage_table_size = ARRAY_SIZE(buck1_voltage_table),
.control_reg = BUCK1_CONTROL_REG,
.low_power_reg = BUCK1_PWRCTRL_REG,
.rank = OTP_RANK_BUCK1,
},
{
.id = STPMU1_BUCK2,
.voltage_table = buck2_voltage_table,
.voltage_table_size = ARRAY_SIZE(buck2_voltage_table),
.control_reg = BUCK2_CONTROL_REG,
.low_power_reg = BUCK2_PWRCTRL_REG,
.rank = OTP_RANK_BUCK2,
},
{
.id = STPMU1_BUCK3,
.voltage_table = buck3_voltage_table,
.voltage_table_size = ARRAY_SIZE(buck3_voltage_table),
.control_reg = BUCK3_CONTROL_REG,
.low_power_reg = BUCK3_PWRCTRL_REG,
.rank = OTP_RANK_BUCK3,
},
{
.id = STPMU1_BUCK4,
.voltage_table = buck4_voltage_table,
.voltage_table_size = ARRAY_SIZE(buck4_voltage_table),
.control_reg = BUCK4_CONTROL_REG,
.low_power_reg = BUCK4_PWRCTRL_REG,
.rank = OTP_RANK_BUCK4,
},
{
.id = STPMU1_LDO1,
.voltage_table = ldo1_voltage_table,
.voltage_table_size = ARRAY_SIZE(ldo1_voltage_table),
.control_reg = LDO1_CONTROL_REG,
.low_power_reg = LDO1_PWRCTRL_REG,
.rank = OTP_RANK_LDO1,
},
{
.id = STPMU1_LDO2,
.voltage_table = ldo2_voltage_table,
.voltage_table_size = ARRAY_SIZE(ldo2_voltage_table),
.control_reg = LDO2_CONTROL_REG,
.low_power_reg = LDO2_PWRCTRL_REG,
.rank = OTP_RANK_LDO2,
},
{
.id = STPMU1_LDO3,
.voltage_table = ldo3_voltage_table,
.voltage_table_size = ARRAY_SIZE(ldo3_voltage_table),
.control_reg = LDO3_CONTROL_REG,
.low_power_reg = LDO3_PWRCTRL_REG,
.rank = OTP_RANK_LDO3,
},
{
.id = STPMU1_LDO4,
.voltage_table = ldo4_voltage_table,
.voltage_table_size = ARRAY_SIZE(ldo4_voltage_table),
.control_reg = LDO4_CONTROL_REG,
.low_power_reg = LDO4_PWRCTRL_REG,
.rank = OTP_RANK_LDO4,
},
{
.id = STPMU1_LDO5,
.voltage_table = ldo5_voltage_table ,
.voltage_table_size = ARRAY_SIZE(ldo5_voltage_table),
.control_reg = LDO5_CONTROL_REG,
.low_power_reg = LDO5_PWRCTRL_REG,
.rank = OTP_RANK_LDO5,
},
{
.id = STPMU1_LDO6,
.voltage_table = ldo6_voltage_table ,
.voltage_table_size = ARRAY_SIZE(ldo6_voltage_table),
.control_reg = LDO6_CONTROL_REG,
.low_power_reg = LDO6_PWRCTRL_REG,
.rank = OTP_RANK_LDO6,
},
{
.id = STPMU1_VREFDDR,
.voltage_table = vref_ddr_voltage_table ,
.voltage_table_size = ARRAY_SIZE(vref_ddr_voltage_table),
.control_reg = VREF_DDR_CONTROL_REG,
.low_power_reg = VREF_DDR_PWRCTRL_REG,
.rank = OTP_RANK_VREFDDR,
},
};
#define MAX_REGUL ARRAY_SIZE(regulators_table)
static regul_struct *STPMU1_Get_Regulator_Data(PMIC_RegulId_TypeDef id)
{
uint8_t i;
for (i = 0 ; i < MAX_REGUL ; i++ )
{
if (id == regulators_table[i].id)
{
return &regulators_table[i];
}
}
/* id not found */
Error_Handler();
return NULL;
}
static uint8_t STPMU1_Voltage_Find_Index(PMIC_RegulId_TypeDef id, uint16_t milivolts)
{
regul_struct *regul = STPMU1_Get_Regulator_Data(id);
uint8_t i;
for ( i = 0 ; i < regul->voltage_table_size ; i++)
{
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if ( regul->voltage_table[i] == milivolts )
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{
LOG_D("idx:%d for %dmV\n\r", (int)i, (int)milivolts);
return i;
}
}
/* voltage not found */
Error_Handler();
return 0;
}
void STPMU1_Enable_Interrupt(PMIC_IRQn IRQn)
{
uint8_t irq_reg , irq_reg_value ;
if (IRQn >= IRQ_NR)
{
return ;
}
/* IRQ register is IRQ Number divided by 8 */
irq_reg = IRQn >> 3 ;
/* value to be set in IRQ register corresponds to BIT(7-N) where N is the Interrupt id modulo 8 */
irq_reg_value = 1 << ( 7 - ( IRQn%8 ) );
/* Clear previous event stored in latch */
stpmu1_write_reg(ITCLEARLATCH1_REG+irq_reg, irq_reg_value );
/* Clear relevant mask to enable interrupt */
stpmu1_write_reg(ITCLEARMASK1_REG+irq_reg, irq_reg_value );
}
void STPMU1_Disable_Interrupt(PMIC_IRQn IRQn)
{
uint8_t irq_reg , irq_reg_value ;
if (IRQn >= IRQ_NR)
{
return ;
}
/* IRQ register is IRQ Number divided by 8 */
irq_reg = IRQn >> 3 ;
/* value to be set in IRQ register corresponds to BIT(7-N) where N is the Interrupt id modulo 8 */
irq_reg_value = 1 << ( 7 - ( IRQn%8 ) );
/* Clear previous event stored in latch */
stpmu1_write_reg(ITCLEARLATCH1_REG+irq_reg, irq_reg_value );
/* Set relevant mask to disable interrupt */
stpmu1_write_reg(ITSETMASK1_REG+irq_reg, irq_reg_value );
}
void BSP_PMIC_INTn_Callback(PMIC_IRQn IRQn)
{
switch (IRQn)
{
case IT_PONKEY_F:
LOG_I("IT_PONKEY_F");
break;
case IT_PONKEY_R:
LOG_I("IT_PONKEY_R");
break;
case IT_WAKEUP_F:
LOG_I("IT_WAKEUP_F");
break;
case IT_WAKEUP_R:
LOG_I("IT_WAKEUP_R");
break;
case IT_VBUS_OTG_F:
LOG_I("IT_VBUS_OTG_F");
break;
case IT_SWOUT_F:
LOG_I("IT_SWOUT_F");
break;
case IT_TWARN_R:
LOG_I("IT_TWARN_R");
break;
case IT_TWARN_F:
LOG_I("IT_TWARN_F");
break;
default:
LOG_I("%d",IRQn);
break;
}
LOG_I(" Interrupt received\n\r");
}
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void STPMU1_INTn_Callback(PMIC_IRQn IRQn)
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{
BSP_PMIC_INTn_Callback(IRQn);
}
void STPMU1_IrqHandler(void)
{
uint8_t irq_reg,mask,latch_events,i;
for (irq_reg = 0 ; irq_reg < STM32_PMIC_NUM_IRQ_REGS ; irq_reg++)
{
/* Get latch events & active mask from register */
mask = stpmu1_read_reg(ITMASK1_REG+irq_reg);
latch_events = stpmu1_read_reg(ITLATCH1_REG+irq_reg) & ~mask ;
/* Go through all bits for each register */
for (i = 0 ; i < 8 ; i++ )
{
if ( latch_events & ( 1 << i ) )
{
/* Callback with parameter computes as "PMIC Interrupt" enum */
STPMU1_INTn_Callback( (PMIC_IRQn )(irq_reg*8 + (7-i)));
}
}
/* Clear events in appropriate register for the event with mask set */
stpmu1_write_reg(ITCLEARLATCH1_REG+irq_reg, latch_events );
}
}
static void STPMU1_Register_Update(uint8_t register_id, uint8_t value, uint8_t mask)
{
uint8_t initial_value ;
initial_value = stpmu1_read_reg(register_id);
/* Clear bits to update */
initial_value &= ~mask;
/* Update appropriate bits*/
initial_value |= ( value & mask );
/* Send new value on I2C Bus */
stpmu1_write_reg(register_id, initial_value);
}
static void STPMU1_Regulator_Enable(PMIC_RegulId_TypeDef id)
{
regul_struct *regul = STPMU1_Get_Regulator_Data(id);
STPMU1_Register_Update(regul->control_reg,BIT(0),BIT(0));
}
static void STPMU1_Regulator_Voltage_Set(PMIC_RegulId_TypeDef id,uint16_t milivolts)
{
uint8_t voltage_index = STPMU1_Voltage_Find_Index(id,milivolts);
regul_struct *regul = STPMU1_Get_Regulator_Data(id);
STPMU1_Register_Update(regul->control_reg, voltage_index<<2 , 0xFC );
}
void BSP_PMIC_INTn_IRQHandler(void)
{
HAL_GPIO_EXTI_IRQHandler(GPIO_PIN_0);
STPMU1_IrqHandler();
}
static rt_err_t rt_hw_pmic_init_register(void)
{
stpmu1_write_reg(MAIN_CONTROL_REG, 0x04);
stpmu1_write_reg(VIN_CONTROL_REG, 0xc0);
stpmu1_write_reg(USB_CONTROL_REG, 0x30);
stpmu1_write_reg(MASK_RESET_BUCK_REG, 0x04);
stpmu1_write_reg(MASK_RESET_LDO_REG, 0x00);
stpmu1_write_reg(MASK_RANK_BUCK_REG, 0x00);
stpmu1_write_reg(MASK_RANK_LDO_REG, 0x00);
stpmu1_write_reg(BUCK_PULL_DOWN_REG, 0x00);
stpmu1_write_reg(LDO14_PULL_DOWN_REG, 0x00);
stpmu1_write_reg(LDO56_PULL_DOWN_REG, 0x00);
stpmu1_write_reg(BUCK_ICC_TURNOFF_REG, 0x30);
stpmu1_write_reg(LDO_ICC_TURNOFF_REG, 0x3b);
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/* vddcore */
STPMU1_Regulator_Voltage_Set(STPMU1_BUCK1, 1200);
STPMU1_Regulator_Enable(STPMU1_BUCK1);
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/* vddddr */
STPMU1_Regulator_Voltage_Set(STPMU1_BUCK2, 1350);
STPMU1_Regulator_Enable(STPMU1_BUCK2);
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[add] audio driver for stm32mp1-dk1
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/* vdd */
STPMU1_Regulator_Voltage_Set(STPMU1_BUCK3, 3300);
STPMU1_Regulator_Enable(STPMU1_BUCK3);
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// /* 3v3 */
// STPMU1_Regulator_Voltage_Set(STPMU1_BUCK4, 3300);
// STPMU1_Regulator_Enable(STPMU1_BUCK4);
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/* 1v8_audio */
STPMU1_Regulator_Voltage_Set(STPMU1_LDO1, 1800);
STPMU1_Regulator_Enable(STPMU1_LDO1);
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/* vdd_emmc */
STPMU1_Regulator_Voltage_Set(STPMU1_LDO2, 2900);
STPMU1_Regulator_Enable(STPMU1_LDO2);
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/* vdd1_ddr */
STPMU1_Regulator_Voltage_Set(STPMU1_LDO3, 0xFFFF);
STPMU1_Regulator_Enable(STPMU1_LDO3);
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/* vdd_usb */
STPMU1_Regulator_Voltage_Set(STPMU1_LDO4, 3300);
STPMU1_Regulator_Enable(STPMU1_LDO4);
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[add] audio driver for stm32mp1-dk1
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/* vdda */
STPMU1_Regulator_Voltage_Set(STPMU1_LDO5, 2900);
STPMU1_Regulator_Enable(STPMU1_LDO5);
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/* 2v8 */
STPMU1_Regulator_Voltage_Set(STPMU1_LDO6, 2800);
STPMU1_Regulator_Enable(STPMU1_LDO6);
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STPMU1_Regulator_Enable(STPMU1_VREFDDR);
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return RT_EOK;
}
static rt_err_t rt_hw_pmic_init(const char *bus_name)
{
PMIC_IRQn irq;
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pmic_dev = rt_i2c_bus_device_find(bus_name);
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if (pmic_dev == RT_NULL)
{
LOG_E("%s bus not found\n", bus_name);
return -RT_ERROR;
}
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if (stpmu1_read_reg(VERSION_STATUS_REG) != PMIC_VERSION_ID)
{
return -RT_EIO;
}
STPMU1_Enable_Interrupt(IT_PONKEY_R);
STPMU1_Enable_Interrupt(IT_PONKEY_F);
/* enable all irqs */
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for (irq = IT_SWOUT_R; irq < IRQ_NR; irq++)
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{
STPMU1_Enable_Interrupt(irq);
}
return RT_EOK;
}
static rt_err_t rt_hw_pmic_deinit(void)
{
BSP_PMIC_MspDeInit();
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return RT_EOK;
}
static int pmic_init(void)
{
rt_err_t result = RT_EOK;
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if (IS_ENGINEERING_BOOT_MODE())
{
BSP_PMIC_MspInit();
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result = rt_hw_pmic_init(I2C_NAME);
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if(result != RT_EOK)
{
LOG_D("stpmic init failed: %02x", result);
rt_hw_pmic_deinit();
return RT_ERROR;
}
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rt_hw_pmic_init_register();
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__HAL_RCC_VREF_CLK_ENABLE();
HAL_SYSCFG_VREFBUF_HighImpedanceConfig(SYSCFG_VREFBUF_HIGH_IMPEDANCE_DISABLE);
HAL_SYSCFG_EnableVREFBUF();
}
LOG_I("stpmic init success!");
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return RT_EOK;
}
INIT_PREV_EXPORT(pmic_init);
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static int i2c_sample(int argc, char *argv[])
{
rt_uint8_t id = 0;
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if (argc > 1)
{
if (!rt_strcmp(argv[1], "read"))
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{
rt_kprintf("i2c read pmic version id\n");
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id = stpmu1_read_reg(VERSION_STATUS_REG);
rt_kprintf("version id : 0x%02x\n", id);
return RT_EOK;
}
else
{
goto _exit;
}
}
_exit:
{
rt_kprintf("Usage:\n");
rt_kprintf("i2c_sample read - read pmic verison id\n");
}
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return RT_ERROR;
}
MSH_CMD_EXPORT(i2c_sample, i2c sample);
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#endif