platform/mellanox: mlxreg-hotplug: Add support for new capability register

Add support for capability register, which is used for detection of the actual number of interrupt capable components within the particular group, supported by the specific system. Such components could be for example the number of power units and interrupts related to these units. The motivation is to avoid adding a new code in the future in order to distinct between the systems type supported different number of the components like power supplies, FANs, ASICs, line cards.

Vadim Pasternak committed 6 years ago

Commit 0e41bf01 parent 48454602 files · +16 −0Browse files

Unified · Split

2 files

drivers/platform/mellanox/mlxreg-hotplug.c +14 −0
include/linux/platform_data/mlxreg.h +2 −0

drivers/platform/mellanox/mlxreg-hotplug.c+14−0

@@ -504,6 +504,20 @@ static int mlxreg_hotplug_set_irq(struct mlxreg_hotplug_priv_data *priv) · 503 unmodified lines
504	504	item = pdata->items;
505	505
506	506	for (i = 0; i < pdata->counter; i++, item++) {
	507	+ if (item->capability) {
	508	+ /*
	509	+ * Read group capability register to get actual number
	510	+ * of interrupt capable components and set group mask
	511	+ * accordingly.
	512	+ */
	513	+ ret = regmap_read(priv->regmap, item->capability,
	514	+ &regval);
	515	+ if (ret)
	516	+ goto out;
	517	+
	518	+ item->mask = GENMASK((regval & item->mask) - 1, 0);
	519	+ }
	520	+
507	521	/* Clear group presense event. */
508	522	ret = regmap_write(priv->regmap, item->reg +
509	523	MLXREG_HOTPLUG_EVENT_OFF, 0);

include/linux/platform_data/mlxreg.h+2−0

@@ -101,6 +101,7 @@ struct mlxreg_core_data { · 100 unmodified lines
101	101	* @aggr_mask: group aggregation mask;
102	102	* @reg: group interrupt status register;
103	103	* @mask: group interrupt mask;
	104	+ * @capability: group capability register;
104	105	* @cache: last status value for elements fro the same group;
105	106	* @count: number of available elements in the group;
106	107	* @ind: element's index inside the group;
@@ -112,6 +113,7 @@ struct mlxreg_core_item { · 5 unmodified lines
112	113	u32 aggr_mask;
113	114	u32 reg;
114	115	u32 mask;
	116	+ u32 capability;
115	117	u32 cache;
116	118	u8 count;
117	119	u8 ind;