> +w2sg0004 UART-attached GPS receiver
> +
I'm wondering why it's tied to the w2sg0004
> +struct w2sg_data {
> + int gpio;
> + int irq; /* irq line from RX pin when pinctrl
> + * set to 'idle' */
> + struct regulator *reg;
> +
> + unsigned long last_toggle; /* jiffies when last toggle completed. */
> + unsigned long backoff; /* jiffies since last_toggle when
> + * we try again
> + */
> + enum {Idle, Down, Up} state; /* state-machine state. */
> + bool requested, is_on;
> + bool suspended;
> + bool reg_enabled;
> +
> + struct delayed_work work;
> + spinlock_t lock;
> + struct device *dev;
> +
> + struct rfkill *rfkill;
So its
- a regulator (optional)
- an irq (optional)
- a gpio (could be optional)
- an optional rfkill
- a pulse time (10ms fixed)
- a backoff time (1 second fixed)
It looks identical to half a dozen other widgets that are found in
Android phones. Would it perhaps be better to make the tiny tweaks to
make it generic
- make the timers configurable
- make the pulse time or high/low selectable for on/off
- make the gpio optional
and just have one driver with the right DT for all similar devices?
Am I missing some w2sg004 specific bits here ?
I think the general model is right, and there will be other slaves that
don't fit the pattern but I do think this one could be generalised.
Alan
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