[U-Boot] [PATCH] fuelgauge: max17042: fix i2c read issue which causes infinity loop.

[Przemyslaw Marczak]

Issues:
- reading i2c data by passing u16 pointer causes errors in read data.
- max17042 status register fields have not only Power On Reset meaning
  so using proper mask is required.

Changes:
- read i2c data to type u32 instead of u16 - avoids buffer overflow
- compare FG status register using mask not just one bit value

Signed-off-by: Przemyslaw Marczak <p.marczak at samsung.com>
Cc: Lukasz Majewski <l.majewski at samsung.com>
---
 drivers/power/fuel_gauge/fg_max17042.c |    9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/power/fuel_gauge/fg_max17042.c b/drivers/power/fuel_gauge/fg_max17042.c
index c285747..2cbf8cf 100644
--- a/drivers/power/fuel_gauge/fg_max17042.c
+++ b/drivers/power/fuel_gauge/fg_max17042.c
@@ -28,11 +28,14 @@ static int fg_write_regs(struct pmic *p, u8 addr, u16 *data, int num)
 
 static int fg_read_regs(struct pmic *p, u8 addr, u16 *data, int num)
 {
+	unsigned int dat = 0;
 	int ret = 0;
 	int i;
 
-	for (i = 0; i < num; i++, addr++)
-		ret |= pmic_reg_read(p, addr, (u32 *) (data + i));
+	for (i = 0; i < num; i++, addr++) {
+		ret |= pmic_reg_read(p, addr, &dat);
+		*(data + i) = (u16) dat;
+	}
 
 	return ret;
 }
@@ -178,7 +181,7 @@ static int power_check_battery(struct pmic *p, struct pmic *bat)
 	ret |= pmic_reg_read(p, MAX17042_STATUS, &val);
 	debug("fg status: 0x%x\n", val);
 
-	if (val == MAX17042_POR)
+	if (val && MAX17042_POR)
 		por_fuelgauge_init(p);
 
 	ret |= pmic_reg_read(p, MAX17042_VERSION, &val);
-- 
1.7.9.5