diff options
| author | Tim Harvey <tharvey@gateworks.com> | 2014-05-05 08:22:25 -0700 |
|---|---|---|
| committer | Stefano Babic <sbabic@denx.de> | 2014-05-09 15:10:43 +0200 |
| commit | 234d89dac61a4f57a0f7cb136a6c442f37a6c9b8 (patch) | |
| tree | 8c7d7d5e0ff32b69658e8b0423e02e0ce1ffa214 | |
| parent | 5e2f01772a87ddd8592d5a53de85261b62faa7fb (diff) | |
| download | u-boot-imx-234d89dac61a4f57a0f7cb136a6c442f37a6c9b8.zip u-boot-imx-234d89dac61a4f57a0f7cb136a6c442f37a6c9b8.tar.gz u-boot-imx-234d89dac61a4f57a0f7cb136a6c442f37a6c9b8.tar.bz2 | |
ventana: Add support for the LTC3676 PMIC
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>
| -rw-r--r-- | board/gateworks/gw_ventana/gw_ventana.c | 80 | ||||
| -rw-r--r-- | include/configs/gw_ventana.h | 2 |
2 files changed, 59 insertions, 23 deletions
diff --git a/board/gateworks/gw_ventana/gw_ventana.c b/board/gateworks/gw_ventana/gw_ventana.c index 7bc69bd..137f817 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 <fdt_support.h> #include <jffs2/load_kernel.h> @@ -732,6 +733,62 @@ struct ventana gpio_cfg[] = { }, }; +/* setup board specific PMIC */ +int power_init_board(void) +{ + 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); + } + } + } + + return 0; +} + /* setup GPIO pinmux and default configuration per baseboard */ static void setup_board_gpio(int board) { @@ -1075,29 +1132,6 @@ 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 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> |