On 23/04/2014 06:53, Tim Harvey wrote:
The LTC3676 PMIC is used instead of the PFUZE100 PMIC on the GW51xx/GW52xx/GW53xx Ventana baseboards. In order to support the IMX6Q SoC at 1GHz on those baseboards, we need to adjust the voltage scaling for the SW1 and SW3 DC/DC converters on the LTC3676 for 1225mV. Note that the scalar values for the LTC3676 are board-specific as they relate to a resistor devider chosen by the board design.
Signed-off-by: Tim Harvey tharvey@gateworks.com
board/gateworks/gw_ventana/gw_ventana.c | 79 ++++++++++++++++++++++++--------- include/configs/gw_ventana.h | 2 + 2 files changed, 59 insertions(+), 22 deletions(-)
diff --git a/board/gateworks/gw_ventana/gw_ventana.c b/board/gateworks/gw_ventana/gw_ventana.c index 48e90e0..29fcebe 100644 --- a/board/gateworks/gw_ventana/gw_ventana.c +++ b/board/gateworks/gw_ventana/gw_ventana.c @@ -30,6 +30,7 @@ #include <mtd_node.h> #include <netdev.h> #include <power/pmic.h> +#include <power/ltc3676_pmic.h> #include <power/pfuze100_pmic.h> #include <i2c.h> #include <fdt_support.h> @@ -733,6 +734,60 @@ struct ventana gpio_cfg[] = { }, };
+/* setup board specific PMIC */ +static void setup_board_pmic(int board) +{
- struct pmic *p;
- u32 reg;
- /* configure PFUZE100 PMIC */
- if (board_type == GW54xx || board_type == GW54proto) {
power_pfuze100_init(I2C_PMIC);p = pmic_get("PFUZE100_PMIC");if (p && !pmic_probe(p)) {pmic_reg_read(p, PFUZE100_DEVICEID, ®);printf("PMIC: PFUZE100 ID=0x%02x\n", reg);/* Set VGEN1 to 1.5V and enable */pmic_reg_read(p, PFUZE100_VGEN1VOL, ®);reg &= ~(LDO_VOL_MASK);reg |= (LDOA_1_50V | LDO_EN);pmic_reg_write(p, PFUZE100_VGEN1VOL, reg);/* Set SWBST to 5.0V and enable */pmic_reg_read(p, PFUZE100_SWBSTCON1, ®);reg &= ~(SWBST_MODE_MASK | SWBST_VOL_MASK);reg |= (SWBST_5_00V | SWBST_MODE_AUTO);pmic_reg_write(p, PFUZE100_SWBSTCON1, reg);}- }
- /* configure LTC3676 PMIC */
- else {
power_ltc3676_init(I2C_PMIC);p = pmic_get("LTC3676_PMIC");if (p && !pmic_probe(p)) {puts("PMIC: LTC3676\n");/* set board-specific scalar to 1225mV for IMX6Q@1GHz */if (is_cpu_type(MXC_CPU_MX6Q)) {/* mask PGOOD during SW1 transition */reg = 0x1d | LTC3676_PGOOD_MASK;pmic_reg_write(p, LTC3676_DVB1B, reg);/* set SW1 (VDD_SOC) to 1259mV */reg = 0x1d;pmic_reg_write(p, LTC3676_DVB1A, reg);/* mask PGOOD during SW3 transition */reg = 0x1d | LTC3676_PGOOD_MASK;pmic_reg_write(p, LTC3676_DVB3B, reg);/*set SW3 (VDD_ARM) to 1259mV */reg = 0x1d;pmic_reg_write(p, LTC3676_DVB3A, reg);}}- }
+}
There is already a power_init_board(), defined as __weak, that you can use here.
/* setup GPIO pinmux and default configuration per baseboard */ static void setup_board_gpio(int board) { @@ -1076,29 +1131,9 @@ int misc_init_r(void) setenv("serial#", str); }
/* configure PFUZE100 PMIC (not used on all Ventana baseboards) */
power_pfuze100_init(I2C_PMIC);
if (board_type == GW54xx || board_type == GW54proto) {
struct pmic *p = pmic_get("PFUZE100_PMIC");u32 reg;if (p && !pmic_probe(p)) {pmic_reg_read(p, PFUZE100_DEVICEID, ®);printf("PMIC: PFUZE100 ID=0x%02x\n", reg);/* Set VGEN1 to 1.5V and enable */pmic_reg_read(p, PFUZE100_VGEN1VOL, ®);reg &= ~(LDO_VOL_MASK);reg |= (LDOA_1_50V | LDO_EN);pmic_reg_write(p, PFUZE100_VGEN1VOL, reg);/* Set SWBST to 5.0V and enable */pmic_reg_read(p, PFUZE100_SWBSTCON1, ®);reg &= ~(SWBST_MODE_MASK | SWBST_VOL_MASK);reg |= (SWBST_5_00V | SWBST_MODE_AUTO);pmic_reg_write(p, PFUZE100_SWBSTCON1, reg);}}
/* setup pmic */
setup_board_pmic(board_type);
/* setup baseboard specific GPIO pinmux and config */ setup_board_gpio(board_type);
diff --git a/include/configs/gw_ventana.h b/include/configs/gw_ventana.h index 3398390..b984f27 100644 --- a/include/configs/gw_ventana.h +++ b/include/configs/gw_ventana.h @@ -136,6 +136,8 @@ #define CONFIG_POWER_I2C #define CONFIG_POWER_PFUZE100 #define CONFIG_POWER_PFUZE100_I2C_ADDR 0x08 +#define CONFIG_POWER_LTC3676 +#define CONFIG_POWER_LTC3676_I2C_ADDR 0x3c
/* Various command support */ #include <config_cmd_default.h>
Best regards, Stefano Babic