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Diffstat (limited to 'fw/fe310/eos/dev/bq25895.c')
-rw-r--r--fw/fe310/eos/dev/bq25895.c43
1 files changed, 43 insertions, 0 deletions
diff --git a/fw/fe310/eos/dev/bq25895.c b/fw/fe310/eos/dev/bq25895.c
new file mode 100644
index 0000000..b290926
--- /dev/null
+++ b/fw/fe310/eos/dev/bq25895.c
@@ -0,0 +1,43 @@
+#include <stdlib.h>
+#include <stdint.h>
+#include <stdio.h>
+
+#include "eos.h"
+#include "pwr.h"
+#include "i2c.h"
+#include "bq25895.h"
+
+static int reg_read(uint8_t reg, uint8_t *data) {
+ return eos_i2c_read8(BQ25895_ADDR, reg, data, 1);
+}
+
+static int reg_write(uint8_t reg, uint8_t data) {
+ return eos_i2c_write8(BQ25895_ADDR, reg, &data, 1);
+}
+
+int eos_bq25895_init(uint8_t wakeup_cause) {
+ int rst = (wakeup_cause == EOS_PWR_WAKE_RST);
+ int i, rv = EOS_OK;
+ uint8_t data = 0;
+
+ if (rst) {
+ rv = reg_write(0x14, 0x80); // reset
+ if (rv) printf("I2C ERROR 0x14\n");
+ rv = reg_write(0x14, 0x00); // disable watchdog
+ if (rv) printf("I2C ERROR 0x14\n");
+ rv = reg_write(0x07, 0x8d); // disable watchdog
+ if (rv) printf("I2C ERROR 0x07\n");
+ rv = reg_write(0x00, 0x28); // 2.1A input current
+ if (rv) printf("I2C ERROR 0x00\n");
+ rv = reg_write(0x02, 0x30); // enable ICO, disaable MaxCharge and D+/D-
+ if (rv) printf("I2C ERROR 0x02\n");
+ }
+
+ printf("BQ25895:\n");
+ for (i=0; i<0x15; i++) {
+ rv = reg_read(i, &data);
+ if (!rv) printf("REG%02x: %02x\n", i, data);
+ }
+
+ return EOS_OK;
+}