[PATCH v2 2/4] docs: hwmon: (ltc2945): change type of val to ULL in ltc2945_val_to_reg()

[Alexandru Ardelean]

In order to account for any potential overflows that could occur.

Signed-off-by: Alexandru Ardelean <alexandru.ardel...@analog.com>
---
 drivers/hwmon/ltc2945.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/hwmon/ltc2945.c b/drivers/hwmon/ltc2945.c
index 1cea710df668..6d4569a25471 100644
--- a/drivers/hwmon/ltc2945.c
+++ b/drivers/hwmon/ltc2945.c
@@ -155,7 +155,7 @@ static long long ltc2945_reg_to_val(struct device *dev, u8 
reg)
 }
 
 static int ltc2945_val_to_reg(struct device *dev, u8 reg,
-                             unsigned long val)
+                             unsigned long long val)
 {
        struct ltc2945_state *st = dev_get_drvdata(dev);
        struct regmap *regmap = st->regmap;
@@ -181,14 +181,14 @@ static int ltc2945_val_to_reg(struct device *dev, u8 reg,
                        return ret;
                if (control & CONTROL_MULT_SELECT) {
                        /* 25 mV * 25 uV = 0.625 uV resolution. */
-                       val = DIV_ROUND_CLOSEST(val, 625);
+                       val = DIV_ROUND_CLOSEST_ULL(val, 625);
                } else {
                        /*
                         * 0.5 mV * 25 uV = 0.0125 uV resolution.
                         * Divide first to avoid overflow;
                         * accept loss of accuracy.
                         */
-                       val = DIV_ROUND_CLOSEST(val, 25) * 2;
+                       val = DIV_ROUND_CLOSEST_ULL(val, 25) * 2;
                }
                break;
        case LTC2945_VIN_H:
@@ -197,7 +197,7 @@ static int ltc2945_val_to_reg(struct device *dev, u8 reg,
        case LTC2945_MAX_VIN_THRES_H:
        case LTC2945_MIN_VIN_THRES_H:
                /* 25 mV resolution. */
-               val /= 25;
+               val = div_u64(val, 25);
                break;
        case LTC2945_ADIN_H:
        case LTC2945_MAX_ADIN_H:
@@ -219,7 +219,7 @@ static int ltc2945_val_to_reg(struct device *dev, u8 reg,
                 * dividing the reported current by the sense resistor value
                 * in mOhm.
                 */
-               val = DIV_ROUND_CLOSEST(val, 25);
+               val = DIV_ROUND_CLOSEST_ULL(val, 25);
                break;
        default:
                return -EINVAL;
@@ -247,7 +247,7 @@ static ssize_t ltc2945_value_store(struct device *dev,
        struct ltc2945_state *st = dev_get_drvdata(dev);
        struct regmap *regmap = st->regmap;
        u8 reg = attr->index;
-       unsigned long val;
+       unsigned long long val;
        u8 regbuf[3];
        int num_regs;
        int regval;
-- 
2.17.1