Re: [PATCH 1/8] mfd: Add Dialog DA906x core driver.

[Krystian Garbaciak <krystian.garbaciak@diasemi.com>]

> On Fri, Aug 24, 2012 at 02:50:00PM +0100, Krystian Garbaciak wrote:
> 
> > This is MFD module providing access to registers and interrupts of DA906x
> > series PMIC. It is used by other functional modules, registered as MFD cells.
> > Driver uses regmap with paging to access extended register list. Register map
> > is divided into two pages, where the second page is used during initialisation.
> 
> Your selection of people to CC here appears both large and random...

I've added any maintainer for my modules from maintainer list.

> > +inline unsigned int da906x_to_range_reg(u16 reg)
> > +{
> > +	return reg + DA906X_MAPPING_BASE;
> > +}
> 
> I've no real idea what this stuff is all about, it at least needs some
> comments somewhere.  The fact that you're just adding a constant offset
> to all registers is at best odd.

I will comment it precisely for next version:

+/* Adding virtual register range starting from address DA9063_MAPPING_BASE.
+   It will be used for registers requiring page switching, which in our case
+   are virtually all PMIC registers.
+   Registers from 0 to 255 are used only as a page window and are volatile,
+   except DA9063_REG_PAGE_CON register (page selector), which is cachable. */
+static const struct regmap_range_cfg da9063_range_cfg[] = {
+	{
+		.range_min = DA9063_MAPPING_BASE,
+		.range_max = DA9063_MAPPING_BASE +
+			     ARRAY_SIZE(da9063_reg_flg) - 1,
+		.selector_reg = DA9063_REG_PAGE_CON,
+		.selector_mask = 1 << DA9063_I2C_PAGE_SEL_SHIFT,
+		.selector_shift = DA9063_I2C_PAGE_SEL_SHIFT,
+		.window_start = 0,
+		.window_len = 256,
+	}
+};

.. and here:

+/* Access to any PMIC register is passed through virtual register range,
+   starting at DA9063_MAPPING_BASE. For those registers, paging is required. */
+inline unsigned int da9063_to_range_reg(u16 reg)
+{
+	return reg + DA9063_MAPPING_BASE;
+}