[U-Boot] [PATCH 2/4] imx: mx6slevk: Add PMIC Pfuze support

[Li Ye-B37916 <b37916@freescale.com>]

Hi Przemyslaw,

On 11/4/2014 11:56 PM, Przemyslaw Marczak wrote:
> Hello Ye Li,
>
> On 09/10/2014 11:08 AM, Ye.Li wrote:
>> Initialize the Pfuze on I2C1 at board late init. The mx6slevk board
>> has Pfuze100 or Pfuze200, print the chip type by parsing the ID.
>>
>> Signed-off-by: Ye.Li <B37916@freescale.com>
>> ---
>>   board/freescale/mx6slevk/mx6slevk.c |   57 +++++++++++++++++++++++++++++++++++
>>   include/configs/mx6slevk.h          |    7 ++++
>>   2 files changed, 64 insertions(+), 0 deletions(-)
>>
>> diff --git a/board/freescale/mx6slevk/mx6slevk.c b/board/freescale/mx6slevk/mx6slevk.c
>> index fedd5c3..8b6a79c 100644
>> --- a/board/freescale/mx6slevk/mx6slevk.c
>> +++ b/board/freescale/mx6slevk/mx6slevk.c
>> @@ -21,6 +21,8 @@
>>   #include <mmc.h>
>>   #include <netdev.h>
>>   #include <i2c.h>
>> +#include <power/pmic.h>
>> +#include <power/pfuze100_pmic.h>
>>
>>   DECLARE_GLOBAL_DATA_PTR;
>>
>> @@ -48,6 +50,8 @@ DECLARE_GLOBAL_DATA_PTR;
>>
>>   #define PC MUX_PAD_CTRL(I2C_PAD_CTRL)
>>
>> +#define I2C_PMIC    0
>> +
>>   /* I2C1 for PMIC */
>>   struct i2c_pads_info i2c_pad_info0 = {
>>       .sda = {
>> @@ -191,6 +195,59 @@ int board_init(void)
>>       return 0;
>>   }
>>
>> +static int pfuze_init(void)
>> +{
>> +    struct pmic *p;
>> +    int ret;
>> +    unsigned int reg;
>> +
>> +    ret = power_pfuze100_init(I2C_PMIC);
>> +    if (ret)
>> +        return ret;
>> +
>> +    p = pmic_get("PFUZE100");
>> +    ret = pmic_probe(p);
>> +    if (ret)
>> +        return ret;
>> +
>> +    pmic_reg_read(p, PFUZE100_DEVICEID, &reg);
>> +    printf("PMIC:  PFUZE%s ID=0x%02x\n",
>> +        ((reg & 0xf) == 0) ? "100" : "200", reg);
>> +
>> +    /* Set SW1AB stanby volage to 0.975V */
>> +    pmic_reg_read(p, PFUZE100_SW1ABSTBY, &reg);
>> +    reg &= ~0x3f;
>> +    reg |= 0x1b;
>> +    pmic_reg_write(p, PFUZE100_SW1ABSTBY, reg);
>> +
>> +    /* Set SW1AB/VDDARM step ramp up time from 16us to 4us/25mV */
>> +    pmic_reg_read(p, PUZE_100_SW1ABCONF, &reg);
>> +    reg &= ~0xc0;
>> +    reg |= 0x40;
>> +    pmic_reg_write(p, PUZE_100_SW1ABCONF, reg);
>> +
>> +    /* Set SW1C standby voltage to 0.975V */
>> +    pmic_reg_read(p, PFUZE100_SW1CSTBY, &reg);
>> +    reg &= ~0x3f;
>> +    reg |= 0x1b;
>> +    pmic_reg_write(p, PFUZE100_SW1CSTBY, reg);
>> +
>> +    /* Set SW1C/VDDSOC step ramp up time from 16us to 4us/25mV */
>> +    pmic_reg_read(p, PFUZE100_SW1CCONF, &reg);
>> +    reg &= ~0xc0;
>> +    reg |= 0x40;
>> +    pmic_reg_write(p, PFUZE100_SW1CCONF, reg);
>> +
>> +    return 0;
>> +}
>> +
>> +int board_late_init(void)
>> +{
>> +    pfuze_init();
>> +
>> +    return 0;
>> +}
>
> Why not use power_init_board()?
> It's dedicated and called at common/board_r.c.
>
Good suggestion, will change to use the power_init_board in v2.

>> +
>>   u32 get_board_rev(void)
>>   {
>>       return get_cpu_rev();
>> diff --git a/include/configs/mx6slevk.h b/include/configs/mx6slevk.h
>> index bf5066f..09d0896 100644
>> --- a/include/configs/mx6slevk.h
>> +++ b/include/configs/mx6slevk.h
>> @@ -30,6 +30,7 @@
>>   #define CONFIG_SYS_MALLOC_LEN        (3 * SZ_1M)
>>
>>   #define CONFIG_BOARD_EARLY_INIT_F
>> +#define CONFIG_BOARD_LATE_INIT
>>   #define CONFIG_MXC_GPIO
>>
>>   #define CONFIG_MXC_UART
>> @@ -66,6 +67,12 @@
>>   #define CONFIG_SYS_I2C_MXC
>>   #define CONFIG_SYS_I2C_SPEED          100000
>>
>> +/* PMIC */
>> +#define CONFIG_POWER
>> +#define CONFIG_POWER_I2C
>> +#define CONFIG_POWER_PFUZE100
>> +#define CONFIG_POWER_PFUZE100_I2C_ADDR    0x08
>
> I assume that the I2C addr is const, if yes then it should be moved to the PFUZE100 header.
>
It is not const. The default I2C address is 0x08.  But it can be programmed from 0x08 to 0x0F by setting
OTP_I2C_ADDR register.

>> +
>>   /* allow to overwrite serial and ethaddr */
>>   #define CONFIG_ENV_OVERWRITE
>>   #define CONFIG_CONS_INDEX        1
>>
>
> Thank you,

Best regards,
Ye Li