quoted

Sorry for the delay. It was a hectic week last week.

As promised:

quoted

This patch adds ST Keyscan driver to use the keypad hw a subset
of ST boards provide. Specific board setup will be put in the
given dt.

Signed-off-by: Giuseppe Condorelli <redacted>
Signed-off-by: Gabriel Fernandez <redacted>

Are you sure these are in the correct order?

ok i change the order

I'm not saying they are in the wrong order, I'm just asking. Who wrote
the patch? Has it changed since?

quoted

quoted

+- linux,keymap: The keymap for keys as described in the binding document
+  devicetree/bindings/input/matrix-keymap.txt.
+
+- keypad,num-rows: Number of row lines connected to the keypad controller.
+
+- keypad,num-columns: Number of column lines connected to the keypad
+  controller.
+
+- st,debounce_us: Debouncing interval time in microseconds

I'm sure there will be a shared binding for de-bounce.

If not, there certainly should be.

you want to refer to "debounce-interval" ?

That sounds more generic, but if it's not documented as such, then
please consider doing so.

quoted

+Example:
+
+keyscan: keyscan@fe4b0000 {
+	compatible = "st,keypad";
Is there any way we can make this more specific to _this_ IP?

for my knowledge this IP is the same for stixxxx platform.

So st,stix-keypad, or st,sti4x-keypad?

I'm just thinking about future proofing the architecture. What if ST
released stj which has a different keypad IP?

quoted

quoted

+struct keyscan_priv {
+	void __iomem *base;
+	int irq;
+	struct clk *clk;
+	struct input_dev *input_dev;
+	struct keypad_platform_data *config;
+	unsigned int last_state;
+	u32 keycodes[ST_KEYSCAN_MAXKEYS];

Seems odd to limit this. Can't the information come from DT
i.e. keypad,num-rows and keypad,num-columns?

i 'll rename 'num_out_pads' into 'n_rows' and 'num_in_pads' into
'n_cols'

That's not quite what I meant, I mean can't ST_KEY_MAXKEYS be more
dynamic and be obtained from (keypad,num-rows * keypad,num-columns)?

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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