On 12/18/24 8:45 AM, Sverdlin, Alexander wrote:
Hi Andrew!
On Tue, 2024-12-17 at 09:56 -0600, Andrew Davis wrote:
+static int lp8864_fault_check(struct lp8864_led *led)
+{
+ int ret, i;
+ unsigned int val;
+
+ ret = regmap_read(led->regmap, LP8864_SUPPLY_STATUS, &val);
+ if (ret)
+ goto err;
You could probably keep this simple and print the exact error here
and return, vs the common error message at the end
This would mean 6x dev_err() instead of one? While I have no idea
what we could do with individual error messages here.
If giving specific error messages is not important, then this is
fine how it is.
Andrew
+
+ /* Odd bits are status bits, even bits are clear bits */
+ for (i = 0; i < ARRAY_SIZE(lp8864_supply_status_msg); i++)
+ if (val & BIT(i * 2 + 1))
+ dev_warn(&led->client->dev, "%s\n", lp8864_supply_status_msg[i]);
+
+ /*
+ * Clear bits have an index preceding the corresponding Status bits;
+ * both have to be written "1" simultaneously to clear the corresponding
+ * Status bit.
+ */
+ if (val)
+ ret = regmap_write(led->regmap, LP8864_SUPPLY_STATUS, val >> 1 | val);
+ if (ret)
+ goto err;
+
+ ret = regmap_read(led->regmap, LP8864_BOOST_STATUS, &val);
+ if (ret)
+ goto err;
+
+ /* Odd bits are status bits, even bits are clear bits */
+ for (i = 0; i < ARRAY_SIZE(lp8864_boost_status_msg); i++)
+ if (val & BIT(i * 2 + 1))
+ dev_warn(&led->client->dev, "%s\n", lp8864_boost_status_msg[i]);
+
+ if (val)
+ ret = regmap_write(led->regmap, LP8864_BOOST_STATUS, val >> 1 | val);
+ if (ret)
+ goto err;
+
+ ret = regmap_read(led->regmap, LP8864_LED_STATUS, &val);
+ if (ret)
+ goto err;
+
+ /*
+ * Clear already reported faults that maintain their value until device
+ * power-down
+ */
+ val &= ~led->led_status_mask;
+
+ for (i = 0; i < ARRAY_SIZE(lp8864_led_status_msg); i++)
+ if (lp8864_led_status_msg[i] && val & BIT(i))
+ dev_warn(&led->client->dev, "%s\n", lp8864_led_status_msg[i]);
+
+ /*
+ * Mark those which maintain their value until device power-down as
+ * "already reported"
+ */
+ led->led_status_mask |= val & ~LP8864_LED_STATUS_WR_MASK;
+
+ /*
+ * Only bits 14, 12, 10 have to be cleared here, but others are RO,
+ * we don't care what we write to them.
+ */
+ if (val & LP8864_LED_STATUS_WR_MASK)
+ ret = regmap_write(led->regmap, LP8864_LED_STATUS, val >> 1 | val);
+ if (ret)
+ goto err;
+
+ return 0;
+
+err:
+ dev_err(&led->client->dev, "Failed to read/clear faults (%pe)\n", ERR_PTR(ret));
+
+ return ret;
+}
