1 files changed, 59 insertions, 0 deletions
diff --git a/fw/fe310/eos/dev/drv/fxl6408.c b/fw/fe310/eos/dev/drv/fxl6408.c
new file mode 100644
index 0000000..2647598
--- /dev/null
+++ b/fw/fe310/eos/dev/drv/fxl6408.c
@@ -0,0 +1,59 @@
+#include <stdlib.h>
+#include <stdint.h>
+
+#include "eos.h"
+#include "soc/i2c.h"
+
+#include "fxl6408.h"
+
+#define FXL6408_ADDR0             0x44
+#define FXL6408_ADDR1             0x43
+
+int fxl6408_reg_read(uint8_t chip_id, uint8_t reg, uint8_t *data) {
+    uint8_t addr = chip_id ? FXL6408_ADDR1 : FXL6408_ADDR0;
+    int rv;
+
+    rv = eos_i2c_read8(addr, reg, data, 1);
+    return rv;
+}
+
+int fxl6408_reg_write(uint8_t chip_id, uint8_t reg, uint8_t data) {
+    uint8_t addr = chip_id ? FXL6408_ADDR1 : FXL6408_ADDR0;
+    int rv;
+
+    rv = eos_i2c_write8(addr, reg, &data, 1);
+    return rv;
+}
+
+int fxl6408_get_pin(uint8_t chip_id, uint8_t reg, uint8_t pin, uint8_t *val) {
+    uint8_t addr = chip_id ? FXL6408_ADDR1 : FXL6408_ADDR0;
+    int rv;
+
+    if (reg == FXL6408_REG_ID_CTRL) return EOS_ERR;
+
+    rv = eos_i2c_read8(addr, reg, val, 1);
+    if (rv) return rv;
+
+    *val = *val >> pin;
+    *val &= 0x01;
+
+    return EOS_OK;
+}
+
+int fxl6408_set_pin(uint8_t chip_id, uint8_t reg, uint8_t pin, uint8_t val) {
+    uint8_t addr = chip_id ? FXL6408_ADDR1 : FXL6408_ADDR0;
+    uint8_t data;
+    int rv;
+
+    if ((reg == FXL6408_REG_ID_CTRL) || (reg == FXL6408_REG_I_STATE)) return EOS_ERR;
+
+    rv = eos_i2c_read8(addr, reg, &data, 1);
+    if (rv) return rv;
+
+    val &= 0x01;
+    data &= ~(1 << pin);
+    if (val) data |= (1 << pin);
+
+    rv = eos_i2c_write8(addr, reg, &data, 1);
+    return rv;
+}