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authorTim Harvey <tharvey@gateworks.com>2014-05-05 08:22:25 -0700
committerStefano Babic <sbabic@denx.de>2014-05-09 15:10:43 +0200
commit234d89dac61a4f57a0f7cb136a6c442f37a6c9b8 (patch)
tree8c7d7d5e0ff32b69658e8b0423e02e0ce1ffa214 /board/gateworks
parent5e2f01772a87ddd8592d5a53de85261b62faa7fb (diff)
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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>
Diffstat (limited to 'board/gateworks')
-rw-r--r--board/gateworks/gw_ventana/gw_ventana.c80
1 files changed, 57 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, &reg);
+ printf("PMIC: PFUZE100 ID=0x%02x\n", reg);
+
+ /* Set VGEN1 to 1.5V and enable */
+ pmic_reg_read(p, PFUZE100_VGEN1VOL, &reg);
+ 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);
+ 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, &reg);
- printf("PMIC: PFUZE100 ID=0x%02x\n", reg);
-
- /* Set VGEN1 to 1.5V and enable */
- pmic_reg_read(p, PFUZE100_VGEN1VOL, &reg);
- 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);
- 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);