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

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