power: supply: bq27xxx: add separate flag for single SoC register

bq27000, bq27010 and upcoming bq34z100 have a single byte SoC
register.  However except this similarity, bq34z100 is quite different
than bq27000/bq27010, so flag BQ27XXX_O_ZERO cannot be reused here.  Add
a new bit flag describing that SoC is a single byte register.

No functional change for bq27000 and bq27010.
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>

drivers/power/supply/bq27xxx_battery.c

@@ -855,6 +855,7 @@ static struct bq27xxx_dm_reg bq27621_dm_regs[] = {
 #define BQ27XXX_O_CFGUP		BIT(3)
 #define BQ27XXX_O_RAM		BIT(4)
 #define BQ27Z561_O_BITS		BIT(5)
+#define BQ27XXX_O_SOC_SI	BIT(6) /* SoC is single register */
 
 #define BQ27XXX_DATA(ref, key, opt) {		\
 	.opts = (opt),				\
@@ -872,8 +873,8 @@ static struct {
 	enum power_supply_property *props;
 	size_t props_size;
 } bq27xxx_chip_data[] = {
-	[BQ27000]   = BQ27XXX_DATA(bq27000,   0         , BQ27XXX_O_ZERO),
-	[BQ27010]   = BQ27XXX_DATA(bq27010,   0         , BQ27XXX_O_ZERO),
+	[BQ27000]   = BQ27XXX_DATA(bq27000,   0         , BQ27XXX_O_ZERO | BQ27XXX_O_SOC_SI),
+	[BQ27010]   = BQ27XXX_DATA(bq27010,   0         , BQ27XXX_O_ZERO | BQ27XXX_O_SOC_SI),
 	[BQ2750X]   = BQ27XXX_DATA(bq2750x,   0         , BQ27XXX_O_OTDC),
 	[BQ2751X]   = BQ27XXX_DATA(bq2751x,   0         , BQ27XXX_O_OTDC),
 	[BQ2752X]   = BQ27XXX_DATA(bq2752x,   0         , BQ27XXX_O_OTDC),
@@ -1420,7 +1421,7 @@ static int bq27xxx_battery_read_soc(struct bq27xxx_device_info *di)
 {
 	int soc;
 
-	if (di->opts & BQ27XXX_O_ZERO)
+	if (di->opts & BQ27XXX_O_SOC_SI)
 		soc = bq27xxx_read(di, BQ27XXX_REG_SOC, true);
 	else
 		soc = bq27xxx_read(di, BQ27XXX_REG_SOC, false);