Lee,
thank you for your feedback.
On Thu Jan 25, 2024 at 1:26 PM CET, Lee Jones wrote:
[...]
> > +#define PM88X_REG_INT_STATUS1 0x05
> > +
> > +#define PM88X_REG_INT_ENA_1 0x0a
> > +#define PM88X_INT_ENA1_ONKEY BIT(0)
> > +
> > +enum pm88x_irq_number {
> > + PM88X_IRQ_ONKEY,
> > +
> > + PM88X_MAX_IRQ
> > +};
>
> An enum for a single IRQ?
There will be a lot more IRQs but I have only added this one so far as
it is the only one used by this series -- is that OK?
> > +static struct reg_sequence pm886_presets[] = {
> > + /* disable watchdog */
> > + REG_SEQ0(PM88X_REG_WDOG, 0x01),
>
> Easier to read if you place spaces between them.
>
> > + /* GPIO1: DVC, GPIO0: input */
> > + REG_SEQ0(PM88X_REG_GPIO_CTRL1, 0x40),
>
> Shouldn't you set these up using Pintrl?
You mean to add a new MFD cell for the pins and write the respective
driver? The downstream implementation has no such thing so I'm not sure
if I would be able to do that from scratch.
> > + /* GPIO2: input */
> > + REG_SEQ0(PM88X_REG_GPIO_CTRL2, 0x00),
> > + /* DVC2, DVC1 */
>
> Please unify all of the comments.
>
> They all use a different structure.
>
> > + REG_SEQ0(PM88X_REG_GPIO_CTRL3, 0x44),
> > + /* GPIO5V_1:input, GPIO5V_2: input */
> > + REG_SEQ0(PM88X_REG_GPIO_CTRL4, 0x00),
> > + /* output 32 kHz from XO */
> > + REG_SEQ0(PM88X_REG_AON_CTRL2, 0x2a),
> > + /* OSC_FREERUN = 1, to lock FLL */
> > + REG_SEQ0(PM88X_REG_BK_OSC_CTRL1, 0x0f),
> > + /* XO_LJ = 1, enable low jitter for 32 kHz */
> > + REG_SEQ0(PM88X_REG_LOWPOWER2, 0x20),
> > + /* OV_VSYS and UV_VSYS1 comparators on VSYS disabled, VSYS_OVER_TH : 5.6V */
> > + REG_SEQ0(PM88X_REG_LOWPOWER4, 0xc8),
> > + /* set the duty cycle of charger DC/DC to max */
> > + REG_SEQ0(PM88X_REG_BK_OSC_CTRL3, 0xc0),
>
> These all looks like they should be handled in their respective drivers?
>
> "patch"ing these in seems like a hack.
To be honest, I don't really know why these are required and what effect
they have -- the comments above taken from the downstream version are
the only thing I have to go by. I might try removing them to see if
there is any noticable change and whether they could be added only later
with the respective drivers.
>
> > +};
>
> Why this instead of
What are you refering to here please?
> > +static struct resource onkey_resources[] = {
> > + DEFINE_RES_IRQ_NAMED(PM88X_IRQ_ONKEY, "88pm88x-onkey"),
> > +};
> > +
> > +static struct mfd_cell pm88x_devs[] = {
> > + {
> > + .name = "88pm88x-onkey",
> > + .num_resources = ARRAY_SIZE(onkey_resources),
> > + .resources = onkey_resources,
> > + .id = -1,
> > + },
> > +};
>
> It's not an MFD if it only supports a single device.
As I have noted above with respect to the IRQ enum and also in the
commit message, I have so far only added the parts which there is
already use for. I intend to add the other parts along with the
respective subdevice drivers, please see my regulator series [1] for an
example.
I thought this approach would make for shorter and simpler patches and
also would allow me to make more informed decisions as I familiarize
myself with the downstream subdevice drivers more closely one by one.
> > + i2c_set_clientdata(client, chip);
> > +
> > + device_init_wakeup(&client->dev, 1);
> > +
> > + chip->regmaps[PM88X_REGMAP_BASE] = devm_regmap_init_i2c(client, &pm88x_i2c_regmap);
> > + if (IS_ERR(chip->regmaps[PM88X_REGMAP_BASE])) {
>
> Just define different regmaps if you really need them.
You mean not to use an array of regmaps but add new struct members
instead? One for each regmap?
> > diff --git a/include/linux/mfd/88pm88x.h b/include/linux/mfd/88pm88x.h
> > new file mode 100644
> > index 000000000000..a34c57447827
> > --- /dev/null
> > +++ b/include/linux/mfd/88pm88x.h
[...]
> > +#define PM88X_REG_ID 0x00
> > +
> > +#define PM88X_REG_STATUS1 0x01
> > +#define PM88X_ONKEY_STS1 BIT(0)
> > +
> > +#define PM88X_REG_MISC_CONFIG1 0x14
> > +#define PM88X_SW_PDOWN BIT(5)
> > +
> > +#define PM88X_REG_MISC_CONFIG2 0x15
> > +#define PM88X_INT_INV BIT(0)
> > +#define PM88X_INT_CLEAR BIT(1)
> > +#define PM88X_INT_RC 0x00
> > +#define PM88X_INT_WC BIT(1)
> > +#define PM88X_INT_MASK_MODE BIT(2)
> > +
> > +#define PM88X_REG_WDOG 0x1d
> > +
> > +#define PM88X_REG_LOWPOWER2 0x21
> > +#define PM88X_REG_LOWPOWER4 0x23
> > +
> > +#define PM88X_REG_GPIO_CTRL1 0x30
>
> These don't really need to be spaced out, do they?
I have spaced them out already as I expect to add some related
definitions to each of these in the future and thought it would then
perhaps be more easily readable like this.
[1] https://lore.kernel.org/all/20231228100208.2932-1-karelb@xxxxxxxxxxxxxxxxxxxx/
Kind regards,
K. B.
