#include <common.h>
#include <i2c.h>
#include <asm/io.h>
+#include <asm/arch/imx-regs.h>
+#include "../common/karo.h"
#include "pmic.h"
#define LTC3676_BUCK1 0x01
#define LTC3676_MSKPG_LDO3 (1 << 6)
#define LTC3676_MSKPG_LDO4 (1 << 7)
-#define VDD_IO_VAL mV_to_regval(vout_to_vref(3300 * 10, 5))
-#define VDD_IO_VAL_LP mV_to_regval(vout_to_vref(3100 * 10, 5))
-#define VDD_IO_VAL_2 mV_to_regval(vout_to_vref(3300 * 10, 5_2))
-#define VDD_IO_VAL_2_LP mV_to_regval(vout_to_vref(3100 * 10, 5_2))
-#define VDD_SOC_VAL mV_to_regval(vout_to_vref(1425 * 10, 6))
-#define VDD_SOC_VAL_LP mV_to_regval(vout_to_vref(900 * 10, 6))
-#define VDD_DDR_VAL mV_to_regval(vout_to_vref(1500 * 10, 7))
-#define VDD_DDR_VAL_LP mV_to_regval(vout_to_vref(1500 * 10, 7))
-#define VDD_CORE_VAL mV_to_regval(vout_to_vref(1425 * 10, 8))
-#define VDD_CORE_VAL_LP mV_to_regval(vout_to_vref(900 * 10, 8))
+#define VDD_IO_VAL mV_to_regval(vout_to_vref(3300, 5))
+#define VDD_IO_VAL_LP mV_to_regval(vout_to_vref(3100, 5))
+#define VDD_IO_VAL_2 mV_to_regval(vout_to_vref(3300, 5_2))
+#define VDD_IO_VAL_2_LP mV_to_regval(vout_to_vref(3100, 5_2))
+#define VDD_SOC_VAL mV_to_regval(vout_to_vref(1425, 6))
+#define VDD_SOC_VAL_LP mV_to_regval(vout_to_vref(900, 6))
+#define VDD_DDR_VAL mV_to_regval(vout_to_vref(1500, 7))
+#define VDD_DDR_VAL_LP mV_to_regval(vout_to_vref(1500, 7))
+#define VDD_CORE_VAL mV_to_regval(vout_to_vref(1425, 8))
+#define VDD_CORE_VAL_LP mV_to_regval(vout_to_vref(900, 8))
/* LDO1 */
#define R1_1 470
#define R1(idx) R1_##idx
#define R2(idx) R2_##idx
+#define v2r(v,n,m) DIV_ROUND(((((v) < (n)) ? (n) : (v)) - (n)), (m))
+#define r2v(r,n,m) (((r) * (m) + (n)) / 10)
+
#define vout_to_vref(vout, idx) ((vout) * R2(idx) / (R1(idx) + R2(idx)))
#define vref_to_vout(vref, idx) DIV_ROUND_UP((vref) * (R1(idx) + R2(idx)), R2(idx))
-#define mV_to_regval(mV) DIV_ROUND(((((mV) < 4125) ? 4125 : (mV)) - 4125), 125)
-#define regval_to_mV(v) (((v) * 125 + 4125))
+#define mV_to_regval(mV) v2r((mV) * 10, 4125, 125)
+#define regval_to_mV(r) r2v(r, 4125, 125)
-static struct ltc3676_regs {
- u8 addr;
- u8 val;
- u8 mask;
-} ltc3676_regs[] = {
+static struct pmic_regs ltc3676_regs[] = {
{ LTC3676_MSKPG, ~LTC3676_MSKPG_BUCK1, },
{ LTC3676_DVB2B, VDD_SOC_VAL_LP | LTC3676_PGOOD_MASK, ~0x3f, },
{ LTC3676_DVB3B, VDD_DDR_VAL_LP, ~0x3f, },
{ LTC3676_CLIRQ, 0, }, /* clear interrupt status */
};
-static struct ltc3676_regs ltc3676_regs_1[] = {
+static struct pmic_regs ltc3676_regs_1[] = {
{ LTC3676_DVB1B, VDD_IO_VAL_LP | LTC3676_PGOOD_MASK, ~0x3f, },
{ LTC3676_DVB1A, VDD_IO_VAL, ~0x3f, },
};
-static struct ltc3676_regs ltc3676_regs_2[] = {
+static struct pmic_regs ltc3676_regs_2[] = {
{ LTC3676_DVB1B, VDD_IO_VAL_2_LP | LTC3676_PGOOD_MASK, ~0x3f, },
{ LTC3676_DVB1A, VDD_IO_VAL_2, ~0x3f, },
};
return pad_settings & 1;
}
-static int ltc3676_setup_regs(struct ltc3676_regs *r, size_t count)
+static int ltc3676_setup_regs(uchar slave_addr, struct pmic_regs *r,
+ size_t count)
{
int ret;
int i;
#ifdef DEBUG
unsigned char value;
- ret = i2c_read(CONFIG_SYS_I2C_SLAVE, r->addr, 1, &value, 1);
+ ret = i2c_read(slave_addr, r->addr, 1, &value, 1);
+ if (ret) {
+ printf("%s: failed to read PMIC register %02x: %d\n",
+ __func__, r->addr, ret);
+ return ret;
+ }
if ((value & ~r->mask) != r->val) {
printf("Changing PMIC reg %02x from %02x to %02x\n",
r->addr, value, r->val);
}
+#endif
+ ret = i2c_write(slave_addr, r->addr, 1, &r->val, 1);
if (ret) {
- printf("%s: failed to read PMIC register %02x: %d\n",
+ printf("%s: failed to write PMIC register %02x: %d\n",
__func__, r->addr, ret);
return ret;
}
-#endif
- ret = i2c_write(CONFIG_SYS_I2C_SLAVE,
- r->addr, 1, &r->val, 1);
+#ifdef DEBUG
+ ret = i2c_read(slave_addr, r->addr, 1, &value, 1);
if (ret) {
- printf("%s: failed to write PMIC register %02x: %d\n",
+ printf("%s: failed to read PMIC register %02x: %d\n",
__func__, r->addr, ret);
return ret;
}
+ if (value != r->val) {
+ printf("Failed to set PMIC reg %02x to %02x; actual value: %02x\n",
+ r->addr, r->val, value);
+ }
+#endif
}
return 0;
}
-int setup_pmic_voltages(void)
+int ltc3676_pmic_setup(uchar slave_addr, struct pmic_regs *regs,
+ size_t count)
{
int ret;
unsigned char value;
- ret = i2c_probe(CONFIG_SYS_I2C_SLAVE);
- if (ret != 0) {
- printf("Failed to initialize I2C\n");
- return ret;
- }
-
- ret = i2c_read(CONFIG_SYS_I2C_SLAVE, 0x11, 1, &value, 1);
+ ret = i2c_read(slave_addr, 0x11, 1, &value, 1);
if (ret) {
printf("%s: i2c_read error: %d\n", __func__, ret);
return ret;
}
- ret = ltc3676_setup_regs(ltc3676_regs, ARRAY_SIZE(ltc3676_regs));
+ ret = ltc3676_setup_regs(slave_addr, ltc3676_regs,
+ ARRAY_SIZE(ltc3676_regs));
if (ret)
return ret;
- printf("VDDCORE set to %umV\n",
- DIV_ROUND(vref_to_vout(regval_to_mV(VDD_CORE_VAL), 8), 10));
- printf("VDDSOC set to %umV\n",
- DIV_ROUND(vref_to_vout(regval_to_mV(VDD_SOC_VAL), 6), 10));
+ ret = i2c_read(slave_addr, LTC3676_DVB4A, 1, &value, 1);
+ if (ret == 0) {
+ printf("VDDCORE set to %umV\n",
+ vref_to_vout(regval_to_mV(value), 8));
+ } else {
+ printf("Failed to read VDDCORE register setting\n");
+ }
+
+ ret = i2c_read(slave_addr, LTC3676_DVB2A, 1, &value, 1);
+ if (ret == 0) {
+ printf("VDDSOC set to %umV\n",
+ vref_to_vout(regval_to_mV(value), 6));
+ } else {
+ printf("Failed to read VDDSOC register setting\n");
+ }
if (tx6_rev_2()) {
- ret = ltc3676_setup_regs(ltc3676_regs_2,
+ ret = ltc3676_setup_regs(slave_addr, ltc3676_regs_2,
ARRAY_SIZE(ltc3676_regs_2));
- printf("VDDIO set to %umV\n",
- DIV_ROUND(vref_to_vout(
- regval_to_mV(VDD_IO_VAL_2), 5_2), 10));
+
+ ret = i2c_read(slave_addr, LTC3676_DVB1A, 1, &value, 1);
+ if (ret == 0) {
+ printf("VDDIO set to %umV\n",
+ vref_to_vout(regval_to_mV(value), 5_2));
+ } else {
+ printf("Failed to read VDDIO register setting\n");
+ }
} else {
- ret = ltc3676_setup_regs(ltc3676_regs_1,
+ ret = ltc3676_setup_regs(slave_addr, ltc3676_regs_1,
ARRAY_SIZE(ltc3676_regs_1));
}
return ret;
projects / karo-tx-uboot.git / blobdiff