[U-Boot,3/4,V2] SMDK5250: Add PMIC voltage settings

This patch adds required pmic voltage settings for SMDK5250.

Signed-off-by: Rajeshwari Shinde <rajeshwari.s@samsung.com>
---
Changes in V2:
	- Added  pmic_reg_update static function.
	- Added error check.
 board/samsung/smdk5250/smdk5250.c |  110 ++++++++++++++++++++++++++++++++++++-
 include/power/max77686_pmic.h     |   30 ++++++++++
 2 files changed, 138 insertions(+), 2 deletions(-)

Hi Rajeshwari,

On Mon, Jan 7, 2013 at 5:08 AM, Rajeshwari Shinde
<rajeshwari.s@samsung.com> wrote:
> This patch adds required pmic voltage settings for SMDK5250.
>
> Signed-off-by: Rajeshwari Shinde <rajeshwari.s@samsung.com>
> ---
> Changes in V2:
>         - Added  pmic_reg_update static function.
>         - Added error check.
>  board/samsung/smdk5250/smdk5250.c |  110 ++++++++++++++++++++++++++++++++++++-
>  include/power/max77686_pmic.h     |   30 ++++++++++
>  2 files changed, 138 insertions(+), 2 deletions(-)
>
> diff --git a/board/samsung/smdk5250/smdk5250.c b/board/samsung/smdk5250/smdk5250.c
> index 73c3ec0..9b0fe39 100644
> --- a/board/samsung/smdk5250/smdk5250.c
> +++ b/board/samsung/smdk5250/smdk5250.c
> @@ -24,14 +24,17 @@
>  #include <fdtdec.h>
>  #include <asm/io.h>
>  #include <i2c.h>
> +#include <errno.h>
>  #include <netdev.h>
>  #include <spi.h>
>  #include <asm/arch/cpu.h>
>  #include <asm/arch/gpio.h>
>  #include <asm/arch/mmc.h>
>  #include <asm/arch/pinmux.h>
> +#include <asm/arch/power.h>
>  #include <asm/arch/sromc.h>
>  #include <power/pmic.h>
> +#include <power/max77686_pmic.h>
>
>  DECLARE_GLOBAL_DATA_PTR;
>
> @@ -58,12 +61,115 @@ int dram_init(void)
>  }
>
>  #if defined(CONFIG_POWER)
> +static int pmic_reg_update(struct pmic *p, int reg, uint regval)
> +{
> +       u32 val;
> +       int ret = 0;
> +
> +       ret = pmic_reg_read(p, reg, &val);
> +       if (ret) {
> +               debug("%s: PMIC register read failed\n", __func__);

Perhaps add register number here

> +               return -1;
> +       }
> +       val |= regval;
> +       ret = pmic_reg_write(p, reg, val);
> +       if (ret) {
> +               debug("%s: PMIC register write failed\n", __func__);

and here

> +               return -1;
> +       }
> +       return 0;
> +}
> +
>  int power_init_board(void)
>  {
> +       struct pmic *p;
> +
> +       power_ps_hold_setup();
> +
> +       i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
> +
>         if (pmic_init(I2C_PMIC))
>                 return -1;
> -       else
> -               return 0;
> +
> +       p = pmic_get("MAX77686_PMIC");
> +       if (!p)
> +               return -ENODEV;
> +
> +       if (pmic_probe(p))
> +               return -1;
> +
> +       if (pmic_reg_update(p, MAX77686_REG_PMIC_32KHZ, MAX77686_32KHCP_EN))
> +               return -1;
> +
> +       if (pmic_reg_update(p, MAX77686_REG_PMIC_BBAT,
> +                               (MAX77686_BBCHOSTEN | MAX77686_BBCVS_3_5V)))

You could remove the brackets around the | expressions in this patch
if you like.

> +               return -1;
> +
> +       /* VDD_MIF */
> +       if (pmic_reg_write(p, MAX77686_REG_PMIC_BUCK1OUT,
> +                                               MAX77686_BUCK1OUT_1V)) {
> +               debug("%s: PMIC BUCK1OUT register write failed\n", __func__);

You can probably remove this debug() if you do what I suggest above.
Same applies below I think.

> +               return -1;
> +       }
> +
> +       if (pmic_reg_update(p, MAX77686_REG_PMIC_BUCK1CRTL,
> +                                               MAX77686_BUCK1CTRL_EN))
> +               return -1;
> +
> +       /* VDD_ARM */
> +       if (pmic_reg_write(p, MAX77686_REG_PMIC_BUCK2DVS1,
> +                                       MAX77686_BUCK2DVS1_1_3V)) {
> +               debug("%s: PMIC BUCK2DVS1 register write failed\n", __func__);
> +               return -1;
> +       }
> +
> +       if (pmic_reg_update(p, MAX77686_REG_PMIC_BUCK2CTRL1,
> +                                       MAX77686_BUCK2CTRL_ON))
> +               return -1;
> +
> +       /* VDD_INT */
> +       if (pmic_reg_write(p, MAX77686_REG_PMIC_BUCK3DVS1,
> +                                       MAX77686_BUCK3DVS1_1_0125V)) {
> +               debug("%s: PMIC BUCK3DVS1 register write failed\n", __func__);
> +               return -1;
> +       }
> +
> +       if (pmic_reg_update(p, MAX77686_REG_PMIC_BUCK3CTRL,
> +                                       MAX77686_BUCK3CTRL_ON))
> +               return -1;
> +
> +       /* VDD_G3D */
> +       if (pmic_reg_write(p, MAX77686_REG_PMIC_BUCK4DVS1,
> +                                       MAX77686_BUCK4DVS1_1_2V)) {
> +               debug("%s: PMIC BUCK4DVS1 register write failed\n", __func__);
> +               return -1;
> +       }
> +
> +       if (pmic_reg_update(p, MAX77686_REG_PMIC_BUCK4CTRL1,
> +                                       MAX77686_BUCK3CTRL_ON))
> +               return -1;
> +
> +       /* VDD_LDO2 */
> +       if (pmic_reg_update(p, MAX77686_REG_PMIC_LDO2CTRL1,
> +                               (MAX77686_LD02CTRL1_1_5V | EN_LDO)))
> +               return -1;
> +
> +       /* VDD_LDO3 */
> +       if (pmic_reg_update(p, MAX77686_REG_PMIC_LDO3CTRL1,
> +                               (MAX77686_LD03CTRL1_1_8V | EN_LDO)))
> +               return -1;
> +
> +       /* VDD_LDO5 */
> +       if (pmic_reg_update(p, MAX77686_REG_PMIC_LDO5CTRL1,
> +                               (MAX77686_LD05CTRL1_1_8V | EN_LDO)))
> +               return -1;
> +
> +       /* VDD_LDO10 */
> +       if (pmic_reg_update(p, MAX77686_REG_PMIC_LDO10CTRL1,
> +                               (MAX77686_LD10CTRL1_1_8V | EN_LDO)))
> +               return -1;
> +
> +       return 0;
>  }
>  #endif
>
> diff --git a/include/power/max77686_pmic.h b/include/power/max77686_pmic.h
> index d949ace..5b7b6ce 100644
> --- a/include/power/max77686_pmic.h
> +++ b/include/power/max77686_pmic.h
> @@ -155,4 +155,34 @@ enum {
>         EN_LDO = (0x3 << 6),
>  };
>
> +/* Buck1 1 volt value */
> +#define MAX77686_BUCK1OUT_1V   0x5
> +#define MAX77686_BUCK1CTRL_EN  (3 << 0)
> +/* Buck2 1.3 volt value */
> +#define MAX77686_BUCK2DVS1_1_3V        0x38
> +#define MAX77686_BUCK2CTRL_ON  (1 << 4)
> +/* Buck3 1.0125 volt value */
> +#define MAX77686_BUCK3DVS1_1_0125V     0x21
> +#define MAX77686_BUCK3CTRL_ON  (1 << 4)
> +/* Buck4 1.2 volt value */
> +#define MAX77686_BUCK4DVS1_1_2V        0x30
> +#define MAX77686_BUCK4CTRL_ON  (1 << 4)
> +/* LDO2 1.5 volt value */
> +#define MAX77686_LD02CTRL1_1_5V        0x1c
> +/* LDO3 1.8 volt value */
> +#define MAX77686_LD03CTRL1_1_8V        0x14
> +/* LDO5 1.8 volt value */
> +#define MAX77686_LD05CTRL1_1_8V        0x14
> +/* LDO10 1.8 volt value */
> +#define MAX77686_LD10CTRL1_1_8V        0x14
> +/* MAX77686_REG_PMIC_32KHZ set to 32KH CP
> + * output is activated
> + */
> +#define MAX77686_32KHCP_EN     (1 << 1)
> +/* MAX77686_REG_PMIC_BBAT set to
> + * Back up batery charger on and
> + * limit voltage setting to 3.5v
> + */
> +#define MAX77686_BBCHOSTEN     (1 << 0)
> +#define MAX77686_BBCVS_3_5V    (3 << 3)
>  #endif /* __MAX77686_PMIC_H_ */
> --
> 1.7.4.4
>

Regards,
Simon