[PATCH] pinctrl: rockchip: Add rk3328 pinctrl support

[PATCH] pinctrl: rockchip: Add rk3328 pinctrl support

[David Wu]

From: "david.wu" <david.wu@rock-chips.com>

This patch supports 3bit width iomux type.
Note, the iomux of following pins are special, need to
be handled specially.
 - gpio2_b0 ~ gpio2_b6
 - gpio2_b7
 - gpio2_c7
 - gpio3_b0
 - gpio3_b1 ~ gpio3_b7
And therefore add IOMUX_RECALCED_FLAG to indicate which
iomux source of the bank need to be recalced. If the mux
recalced callback and IOMUX_RECALCED_FLAG were set, recalc
the related pins' iomux.

Signed-off-by: david.wu <david.wu@rock-chips.com>
---
 .../bindings/pinctrl/rockchip,pinctrl.txt          |   4 +-
 drivers/pinctrl/pinctrl-rockchip.c                 | 157 ++++++++++++++++++++-
 2 files changed, 152 insertions(+), 9 deletions(-)

diff --git a/Documentation/devicetree/bindings/pinctrl/rockchip,pinctrl.txt b/Documentation/devicetree/bindings/pinctrl/rockchip,pinctrl.txt
index 4722bc6..403b5a2 100644
--- a/Documentation/devicetree/bindings/pinctrl/rockchip,pinctrl.txt
+++ b/Documentation/devicetree/bindings/pinctrl/rockchip,pinctrl.txt
@@ -22,8 +22,8 @@ Required properties for iomux controller:
   - compatible: one of "rockchip,rk1108-pinctrl", "rockchip,rk2928-pinctrl"
 		       "rockchip,rk3066a-pinctrl", "rockchip,rk3066b-pinctrl"
 		       "rockchip,rk3188-pinctrl", "rockchip,rk3228-pinctrl"
-		       "rockchip,rk3288-pinctrl", "rockchip,rk3368-pinctrl"
-		       "rockchip,rk3399-pinctrl"
+		       "rockchip,rk3288-pinctrl", "rockchip,rk3328-pinctrl"
+		       "rockchip,rk3368-pinctrl", "rockchip,rk3399-pinctrl"
   - rockchip,grf: phandle referencing a syscon providing the
 	 "general register files"
 
diff --git a/drivers/pinctrl/pinctrl-rockchip.c b/drivers/pinctrl/pinctrl-rockchip.c
index 08765f5..cc05753 100644
--- a/drivers/pinctrl/pinctrl-rockchip.c
+++ b/drivers/pinctrl/pinctrl-rockchip.c
@@ -75,6 +75,8 @@ enum rockchip_pinctrl_type {
 #define IOMUX_WIDTH_4BIT	BIT(1)
 #define IOMUX_SOURCE_PMU	BIT(2)
 #define IOMUX_UNROUTED		BIT(3)
+#define IOMUX_WIDTH_3BIT	BIT(4)
+#define IOMUX_RECALCED_FLAG	BIT(5)
 
 /**
  * @type: iomux variant using IOMUX_* constants
@@ -304,6 +306,8 @@ struct rockchip_pin_ctrl {
 	void	(*drv_calc_reg)(struct rockchip_pin_bank *bank,
 				    int pin_num, struct regmap **regmap,
 				    int *reg, u8 *bit);
+	void	(*iomux_recalc)(u8 bank_num, int pin, int *reg,
+				int *mask, u8 *bit);
 };
 
 struct rockchip_pin_config {
@@ -355,6 +359,24 @@ struct rockchip_pinctrl {
 	unsigned int			nfunctions;
 };
 
+/**
+ * struct rockchip_mux_recalced_data: represent a pin iomux data.
+ * @num: bank num.
+ * @bit: index at register or used to calc index.
+ * @min_pin: the min pin.
+ * @max_pin: the max pin.
+ * @reg: the register offset.
+ * @mask: mask bit
+ */
+struct rockchip_mux_recalced_data {
+	u8 num;
+	u8 bit;
+	int min_pin;
+	int max_pin;
+	int reg;
+	int mask;
+};
+
 static struct regmap_config rockchip_regmap_config = {
 	.reg_bits = 32,
 	.val_bits = 32,
@@ -514,13 +536,83 @@ static void rockchip_dt_free_map(struct pinctrl_dev *pctldev,
  * Hardware access
  */
 
+static const struct rockchip_mux_recalced_data rk3328_mux_recalced_data[] = {
+	{
+		.num = 2,
+		.bit = 0x2,
+		.min_pin = 8,
+		.max_pin = 14,
+		.reg = 0x24,
+		.mask = 0x3
+	},
+	{
+		.num = 2,
+		.bit = 0,
+		.min_pin = 15,
+		.max_pin = 15,
+		.reg = 0x28,
+		.mask = 0x7
+	},
+	{
+		.num = 2,
+		.bit = 14,
+		.min_pin = 23,
+		.max_pin = 23,
+		.reg = 0x30,
+		.mask = 0x3
+	},
+	{
+		.num = 3,
+		.bit = 0,
+		.min_pin = 8,
+		.max_pin = 8,
+		.reg = 0x40,
+		.mask = 0x7
+	},
+	{
+		.num = 3,
+		.bit = 0x2,
+		.min_pin = 9,
+		.max_pin = 15,
+		.reg = 0x44,
+		.mask = 0x3
+	},
+};
+
+static void rk3328_recalc_mux(u8 bank_num, int pin, int *reg,
+			      int *mask, u8 *bit)
+{
+	const struct rockchip_mux_recalced_data *data = NULL;
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(rk3328_mux_recalced_data); i++)
+		if (rk3328_mux_recalced_data[i].num == bank_num &&
+		    rk3328_mux_recalced_data[i].min_pin <= pin &&
+		    rk3328_mux_recalced_data[i].max_pin >= pin) {
+			data = &rk3328_mux_recalced_data[i];
+			break;
+		}
+
+	if (!data)
+		return;
+
+	*reg = data->reg;
+	*mask = data->mask;
+
+	if (data->min_pin == data->max_pin)
+		*bit = data->bit;
+	else
+		*bit = (pin % 8) * data->bit;
+}
+
 static int rockchip_get_mux(struct rockchip_pin_bank *bank, int pin)
 {
 	struct rockchip_pinctrl *info = bank->drvdata;
+	struct rockchip_pin_ctrl *ctrl = info->ctrl;
 	int iomux_num = (pin / 8);
 	struct regmap *regmap;
 	unsigned int val;
-	int reg, ret, mask;
+	int reg, ret, mask, mux_type;
 	u8 bit;
 
 	if (iomux_num > 3)
@@ -538,16 +630,26 @@ static int rockchip_get_mux(struct rockchip_pin_bank *bank, int pin)
 				? info->regmap_pmu : info->regmap_base;
 
 	/* get basic quadrupel of mux registers and the correct reg inside */
-	mask = (bank->iomux[iomux_num].type & IOMUX_WIDTH_4BIT) ? 0xf : 0x3;
+	mux_type = bank->iomux[iomux_num].type;
 	reg = bank->iomux[iomux_num].offset;
-	if (bank->iomux[iomux_num].type & IOMUX_WIDTH_4BIT) {
+	if (mux_type & IOMUX_WIDTH_4BIT) {
 		if ((pin % 8) >= 4)
 			reg += 0x4;
 		bit = (pin % 4) * 4;
+		mask = 0xf;
+	} else if (mux_type & IOMUX_WIDTH_3BIT) {
+		if ((pin % 8) >= 5)
+			reg += 0x4;
+		bit = (pin % 5) * 3;
+		mask = 0x7;
 	} else {
 		bit = (pin % 8) * 2;
+		mask = 0x3;
 	}
 
+	if (ctrl->iomux_recalc && (mux_type & IOMUX_RECALCED_FLAG))
+		ctrl->iomux_recalc(bank->bank_num, pin, &reg, &mask, &bit);
+
 	ret = regmap_read(regmap, reg, &val);
 	if (ret)
 		return ret;
@@ -571,9 +673,10 @@ static int rockchip_get_mux(struct rockchip_pin_bank *bank, int pin)
 static int rockchip_set_mux(struct rockchip_pin_bank *bank, int pin, int mux)
 {
 	struct rockchip_pinctrl *info = bank->drvdata;
+	struct rockchip_pin_ctrl *ctrl = info->ctrl;
 	int iomux_num = (pin / 8);
 	struct regmap *regmap;
-	int reg, ret, mask;
+	int reg, ret, mask, mux_type;
 	unsigned long flags;
 	u8 bit;
 	u32 data, rmask;
@@ -603,16 +706,26 @@ static int rockchip_set_mux(struct rockchip_pin_bank *bank, int pin, int mux)
 				? info->regmap_pmu : info->regmap_base;
 
 	/* get basic quadrupel of mux registers and the correct reg inside */
-	mask = (bank->iomux[iomux_num].type & IOMUX_WIDTH_4BIT) ? 0xf : 0x3;
+	mux_type = bank->iomux[iomux_num].type;
 	reg = bank->iomux[iomux_num].offset;
-	if (bank->iomux[iomux_num].type & IOMUX_WIDTH_4BIT) {
+	if (mux_type & IOMUX_WIDTH_4BIT) {
 		if ((pin % 8) >= 4)
 			reg += 0x4;
 		bit = (pin % 4) * 4;
+		mask = 0xf;
+	} else if (mux_type & IOMUX_WIDTH_3BIT) {
+		if ((pin % 8) >= 5)
+			reg += 0x4;
+		bit = (pin % 5) * 3;
+		mask = 0x7;
 	} else {
 		bit = (pin % 8) * 2;
+		mask = 0x3;
 	}
 
+	if (ctrl->iomux_recalc && (mux_type & IOMUX_RECALCED_FLAG))
+		ctrl->iomux_recalc(bank->bank_num, pin, &reg, &mask, &bit);
+
 	spin_lock_irqsave(&bank->slock, flags);
 
 	data = (mask << (bit + 16));
@@ -2359,7 +2472,8 @@ static struct rockchip_pin_ctrl *rockchip_pinctrl_get_soc_data(
 			 * Increase offset according to iomux width.
 			 * 4bit iomux'es are spread over two registers.
 			 */
-			inc = (iom->type & IOMUX_WIDTH_4BIT) ? 8 : 4;
+			inc = (iom->type & (IOMUX_WIDTH_4BIT |
+					    IOMUX_WIDTH_3BIT)) ? 8 : 4;
 			if (iom->type & IOMUX_SOURCE_PMU)
 				pmu_offs += inc;
 			else
@@ -2679,6 +2793,33 @@ static int rockchip_pinctrl_probe(struct platform_device *pdev)
 		.drv_calc_reg		= rk3288_calc_drv_reg_and_bit,
 };
 
+static struct rockchip_pin_bank rk3328_pin_banks[] = {
+	PIN_BANK_IOMUX_FLAGS(0, 32, "gpio0", 0, 0, 0, 0),
+	PIN_BANK_IOMUX_FLAGS(1, 32, "gpio1", 0, 0, 0, 0),
+	PIN_BANK_IOMUX_FLAGS(2, 32, "gpio2", 0,
+			     IOMUX_WIDTH_3BIT | IOMUX_RECALCED_FLAG,
+			     IOMUX_WIDTH_3BIT | IOMUX_RECALCED_FLAG,
+			     0
+			     ),
+	PIN_BANK_IOMUX_FLAGS(3, 32, "gpio3",
+			     IOMUX_WIDTH_3BIT,
+			     IOMUX_WIDTH_3BIT | IOMUX_RECALCED_FLAG,
+			     0,
+			     0
+			     ),
+};
+
+static struct rockchip_pin_ctrl rk3328_pin_ctrl = {
+		.pin_banks		= rk3328_pin_banks,
+		.nr_banks		= ARRAY_SIZE(rk3328_pin_banks),
+		.label			= "RK3328-GPIO",
+		.type			= RK3288,
+		.grf_mux_offset		= 0x0,
+		.pull_calc_reg		= rk3228_calc_pull_reg_and_bit,
+		.drv_calc_reg		= rk3228_calc_drv_reg_and_bit,
+		.iomux_recalc		= rk3328_recalc_mux,
+};
+
 static struct rockchip_pin_bank rk3368_pin_banks[] = {
 	PIN_BANK_IOMUX_FLAGS(0, 32, "gpio0", IOMUX_SOURCE_PMU,
 					     IOMUX_SOURCE_PMU,
@@ -2784,6 +2925,8 @@ static int rockchip_pinctrl_probe(struct platform_device *pdev)
 		.data = (void *)&rk3228_pin_ctrl },
 	{ .compatible = "rockchip,rk3288-pinctrl",
 		.data = (void *)&rk3288_pin_ctrl },
+	{ .compatible = "rockchip,rk3328-pinctrl",
+		.data = (void *)&rk3328_pin_ctrl },
 	{ .compatible = "rockchip,rk3368-pinctrl",
 		.data = (void *)&rk3368_pin_ctrl },
 	{ .compatible = "rockchip,rk3399-pinctrl",
-- 
1.9.1

Re: [PATCH] pinctrl: rockchip: Add rk3328 pinctrl support

[Linus Walleij]

On Sun, Jan 22, 2017 at 9:38 AM, David Wu <david.wu@rock-chips.com> wrote:

> From: "david.wu" <david.wu@rock-chips.com>
>
> This patch supports 3bit width iomux type.
> Note, the iomux of following pins are special, need to
> be handled specially.
>  - gpio2_b0 ~ gpio2_b6
>  - gpio2_b7
>  - gpio2_c7
>  - gpio3_b0
>  - gpio3_b1 ~ gpio3_b7
> And therefore add IOMUX_RECALCED_FLAG to indicate which
> iomux source of the bank need to be recalced. If the mux
> recalced callback and IOMUX_RECALCED_FLAG were set, recalc
> the related pins' iomux.
>
> Signed-off-by: david.wu <david.wu@rock-chips.com>

Heiko, could you review this?

Yours,
Linus Walleij

Re: [PATCH] pinctrl: rockchip: Add rk3328 pinctrl support

[Heiko Stübner]

Am Donnerstag, 26. Januar 2017, 14:29:17 CET schrieb Linus Walleij:
> On Sun, Jan 22, 2017 at 9:38 AM, David Wu <david.wu@rock-chips.com> wrote:
> > From: "david.wu" <david.wu@rock-chips.com>
> > 
> > This patch supports 3bit width iomux type.
> > Note, the iomux of following pins are special, need to
> > be handled specially.
> > 
> >  - gpio2_b0 ~ gpio2_b6
> >  - gpio2_b7
> >  - gpio2_c7
> >  - gpio3_b0
> >  - gpio3_b1 ~ gpio3_b7
> > 
> > And therefore add IOMUX_RECALCED_FLAG to indicate which
> > iomux source of the bank need to be recalced. If the mux
> > recalced callback and IOMUX_RECALCED_FLAG were set, recalc
> > the related pins' iomux.
> > 
> > Signed-off-by: david.wu <david.wu@rock-chips.com>
> 
> Heiko, could you review this?

it's on my todo list, I just didn't have the time this week so far.


Heiko

Re: [PATCH] pinctrl: rockchip: Add rk3328 pinctrl support

[Heiko Stuebner]

Hi David,

Am Sonntag, 22. Januar 2017, 16:38:06 CET schrieb David Wu:
> From: "david.wu" <david.wu-TNX95d0MmH7DzftRWevZcw@public.gmane.org>
> 
> This patch supports 3bit width iomux type.
> Note, the iomux of following pins are special, need to
> be handled specially.
>  - gpio2_b0 ~ gpio2_b6
>  - gpio2_b7
>  - gpio2_c7
>  - gpio3_b0
>  - gpio3_b1 ~ gpio3_b7
> And therefore add IOMUX_RECALCED_FLAG to indicate which
> iomux source of the bank need to be recalced. If the mux
> recalced callback and IOMUX_RECALCED_FLAG were set, recalc
> the related pins' iomux.
> 
> Signed-off-by: david.wu <david.wu-TNX95d0MmH7DzftRWevZcw@public.gmane.org>

Patch description should pay a lot of attention to explaining _why_ a change 
is necessary.

In general, please split the patch in at least 3 individual patches:
- addition of 3bit mux support (that part looks good)
- that recalculation-part ... which I'm still struggling to understand
  but will hopefully have understood down below
- addition of actual rk3328-support (rk3328-specific functions and 


> diff --git a/drivers/pinctrl/pinctrl-rockchip.c
> b/drivers/pinctrl/pinctrl-rockchip.c index 08765f5..cc05753 100644
> --- a/drivers/pinctrl/pinctrl-rockchip.c
> +++ b/drivers/pinctrl/pinctrl-rockchip.c
> @@ -75,6 +75,8 @@ enum rockchip_pinctrl_type {
>  #define IOMUX_WIDTH_4BIT	BIT(1)
>  #define IOMUX_SOURCE_PMU	BIT(2)
>  #define IOMUX_UNROUTED		BIT(3)
> +#define IOMUX_WIDTH_3BIT	BIT(4)
> +#define IOMUX_RECALCED_FLAG	BIT(5)

leave out the "_FLAG" bit please, makes it shorter and its state as flag is 
clearly visible

[...]

> @@ -355,6 +359,24 @@ struct rockchip_pinctrl {
>  	unsigned int			nfunctions;
>  };
> 
> +/**
> + * struct rockchip_mux_recalced_data: represent a pin iomux data.
> + * @num: bank num.
> + * @bit: index at register or used to calc index.
> + * @min_pin: the min pin.
> + * @max_pin: the max pin.
> + * @reg: the register offset.
> + * @mask: mask bit
> + */
> +struct rockchip_mux_recalced_data {
> +	u8 num;
> +	u8 bit;
> +	int min_pin;
> +	int max_pin;
> +	int reg;
> +	int mask;

please reorganize
	num, min_pin, max_pin are the queried values
while
	reg, bit, mask are the result values

Mixing these makes it hard to understand. Same for the table below.


> +};
> +
>  static struct regmap_config rockchip_regmap_config = {
>  	.reg_bits = 32,
>  	.val_bits = 32,
> @@ -514,13 +536,83 @@ static void rockchip_dt_free_map(struct pinctrl_dev
> *pctldev, * Hardware access
>   */
> 
> +static const struct rockchip_mux_recalced_data rk3328_mux_recalced_data[] =
> { +	{
> +		.num = 2,
> +		.bit = 0x2,
> +		.min_pin = 8,
> +		.max_pin = 14,
> +		.reg = 0x24,
> +		.mask = 0x3
> +	},
> +	{
> +		.num = 2,
> +		.bit = 0,
> +		.min_pin = 15,
> +		.max_pin = 15,
> +		.reg = 0x28,
> +		.mask = 0x7
> +	},
> +	{

nit: coding style, "}, {"


> +		.num = 2,
> +		.bit = 14,
> +		.min_pin = 23,
> +		.max_pin = 23,
> +		.reg = 0x30,
> +		.mask = 0x3
> +	},
> +	{
> +		.num = 3,
> +		.bit = 0,
> +		.min_pin = 8,
> +		.max_pin = 8,
> +		.reg = 0x40,
> +		.mask = 0x7
> +	},
> +	{
> +		.num = 3,
> +		.bit = 0x2,
> +		.min_pin = 9,
> +		.max_pin = 15,
> +		.reg = 0x44,
> +		.mask = 0x3

I think I don't fully understand what this is supposed to do. In the TRM you 
send me at 0x44 all bits are marked as reserved and the other registers also 
look very strange.

I guess GPIO2CH_IOMUX shows the thing you're trying solve, with gpio2_c6 being 
at [5:3] but gpio2_c7 got moved to [15:14] out of its natural position.
Chip designers have strange ideas it seems.


Heiko

Re: [PATCH] pinctrl: rockchip: Add rk3328 pinctrl support

[Heiko Stuebner]

Hi David,

Am Sonntag, 22. Januar 2017, 16:38:06 CET schrieb David Wu:
> From: "david.wu" <david.wu@rock-chips.com>
> 
> This patch supports 3bit width iomux type.
> Note, the iomux of following pins are special, need to
> be handled specially.
>  - gpio2_b0 ~ gpio2_b6
>  - gpio2_b7
>  - gpio2_c7
>  - gpio3_b0
>  - gpio3_b1 ~ gpio3_b7
> And therefore add IOMUX_RECALCED_FLAG to indicate which
> iomux source of the bank need to be recalced. If the mux
> recalced callback and IOMUX_RECALCED_FLAG were set, recalc
> the related pins' iomux.
> 
> Signed-off-by: david.wu <david.wu@rock-chips.com>

Patch description should pay a lot of attention to explaining _why_ a change 
is necessary.

In general, please split the patch in at least 3 individual patches:
- addition of 3bit mux support (that part looks good)
- that recalculation-part ... which I'm still struggling to understand
  but will hopefully have understood down below
- addition of actual rk3328-support (rk3328-specific functions and 


> diff --git a/drivers/pinctrl/pinctrl-rockchip.c
> b/drivers/pinctrl/pinctrl-rockchip.c index 08765f5..cc05753 100644
> --- a/drivers/pinctrl/pinctrl-rockchip.c
> +++ b/drivers/pinctrl/pinctrl-rockchip.c
> @@ -75,6 +75,8 @@ enum rockchip_pinctrl_type {
>  #define IOMUX_WIDTH_4BIT	BIT(1)
>  #define IOMUX_SOURCE_PMU	BIT(2)
>  #define IOMUX_UNROUTED		BIT(3)
> +#define IOMUX_WIDTH_3BIT	BIT(4)
> +#define IOMUX_RECALCED_FLAG	BIT(5)

leave out the "_FLAG" bit please, makes it shorter and its state as flag is 
clearly visible

[...]

> @@ -355,6 +359,24 @@ struct rockchip_pinctrl {
>  	unsigned int			nfunctions;
>  };
> 
> +/**
> + * struct rockchip_mux_recalced_data: represent a pin iomux data.
> + * @num: bank num.
> + * @bit: index at register or used to calc index.
> + * @min_pin: the min pin.
> + * @max_pin: the max pin.
> + * @reg: the register offset.
> + * @mask: mask bit
> + */
> +struct rockchip_mux_recalced_data {
> +	u8 num;
> +	u8 bit;
> +	int min_pin;
> +	int max_pin;
> +	int reg;
> +	int mask;

please reorganize
	num, min_pin, max_pin are the queried values
while
	reg, bit, mask are the result values

Mixing these makes it hard to understand. Same for the table below.


> +};
> +
>  static struct regmap_config rockchip_regmap_config = {
>  	.reg_bits = 32,
>  	.val_bits = 32,
> @@ -514,13 +536,83 @@ static void rockchip_dt_free_map(struct pinctrl_dev
> *pctldev, * Hardware access
>   */
> 
> +static const struct rockchip_mux_recalced_data rk3328_mux_recalced_data[] =
> { +	{
> +		.num = 2,
> +		.bit = 0x2,
> +		.min_pin = 8,
> +		.max_pin = 14,
> +		.reg = 0x24,
> +		.mask = 0x3
> +	},
> +	{
> +		.num = 2,
> +		.bit = 0,
> +		.min_pin = 15,
> +		.max_pin = 15,
> +		.reg = 0x28,
> +		.mask = 0x7
> +	},
> +	{

nit: coding style, "}, {"


> +		.num = 2,
> +		.bit = 14,
> +		.min_pin = 23,
> +		.max_pin = 23,
> +		.reg = 0x30,
> +		.mask = 0x3
> +	},
> +	{
> +		.num = 3,
> +		.bit = 0,
> +		.min_pin = 8,
> +		.max_pin = 8,
> +		.reg = 0x40,
> +		.mask = 0x7
> +	},
> +	{
> +		.num = 3,
> +		.bit = 0x2,
> +		.min_pin = 9,
> +		.max_pin = 15,
> +		.reg = 0x44,
> +		.mask = 0x3

I think I don't fully understand what this is supposed to do. In the TRM you 
send me at 0x44 all bits are marked as reserved and the other registers also 
look very strange.

I guess GPIO2CH_IOMUX shows the thing you're trying solve, with gpio2_c6 being 
at [5:3] but gpio2_c7 got moved to [15:14] out of its natural position.
Chip designers have strange ideas it seems.


Heiko

Re: [PATCH] pinctrl: rockchip: Add rk3328 pinctrl support

[David.Wu]

Hi Heiko,

Sorry for late reply because of the holiday.

>> @@ -355,6 +359,24 @@ struct rockchip_pinctrl {
>>  	unsigned int			nfunctions;
>>  };
>>
>> +/**
>> + * struct rockchip_mux_recalced_data: represent a pin iomux data.
>> + * @num: bank num.
>> + * @bit: index at register or used to calc index.
>> + * @min_pin: the min pin.
>> + * @max_pin: the max pin.
>> + * @reg: the register offset.
>> + * @mask: mask bit
>> + */
>> +struct rockchip_mux_recalced_data {
>> +	u8 num;
>> +	u8 bit;
>> +	int min_pin;
>> +	int max_pin;
>> +	int reg;
>> +	int mask;
>
> please reorganize
> 	num, min_pin, max_pin are the queried values
> while
> 	reg, bit, mask are the result values
>
> Mixing these makes it hard to understand. Same for the table below.
>

How about this struct?
struct rockchip_mux_recalced_data {
	struct {
		u8 num;
		int pin;
	} querie;
	struct {
		u8 reg;
		u8 bit;
		u8 mask;
	} result;
};

>
>> +};
>> +
>>  static struct regmap_config rockchip_regmap_config = {
>>  	.reg_bits = 32,
>>  	.val_bits = 32,
>> @@ -514,13 +536,83 @@ static void rockchip_dt_free_map(struct pinctrl_dev
>> *pctldev, * Hardware access
>>   */
>>
>> +static const struct rockchip_mux_recalced_data rk3328_mux_recalced_data[] =
>> { +	{
>> +		.num = 2,
>> +		.bit = 0x2,
>> +		.min_pin = 8,
>> +		.max_pin = 14,
>> +		.reg = 0x24,
>> +		.mask = 0x3
>> +	},
>> +	{
>> +		.num = 2,
>> +		.bit = 0,
>> +		.min_pin = 15,
>> +		.max_pin = 15,
>> +		.reg = 0x28,
>> +		.mask = 0x7
>> +	},
>> +	{
>
> nit: coding style, "}, {"
>
>
>> +		.num = 2,
>> +		.bit = 14,
>> +		.min_pin = 23,
>> +		.max_pin = 23,
>> +		.reg = 0x30,
>> +		.mask = 0x3
>> +	},
>> +	{
>> +		.num = 3,
>> +		.bit = 0,
>> +		.min_pin = 8,
>> +		.max_pin = 8,
>> +		.reg = 0x40,
>> +		.mask = 0x7
>> +	},
>> +	{
>> +		.num = 3,
>> +		.bit = 0x2,
>> +		.min_pin = 9,
>> +		.max_pin = 15,
>> +		.reg = 0x44,
>> +		.mask = 0x3
>
> I think I don't fully understand what this is supposed to do. In the TRM you
> send me at 0x44 all bits are marked as reserved and the other registers also
> look very strange.

Sorry, there is a wrong description in my patch.
The reserved pins are not opened at rk3328 soc, could not be used, but 
they appear in my code, this makes you confused.

There are three pins need to be recalculated from the the latest GRF i 
sent to you just now.
  - gpio2_b4
  - gpio2_b7
  - gpio2_c7

So, the max_pin and min_pin changes to pin in the 
"rockchip_mux_recalced_data" struct, because there are no serial pins to 
be recalculated, but three single pins.

>
> I guess GPIO2CH_IOMUX shows the thing you're trying solve, with gpio2_c6 being
> at [5:3] but gpio2_c7 got moved to [15:14] out of its natural position.
> Chip designers have strange ideas it seems.

Yes, it is very strange here, not so well-regulated.

>
>
> Heiko
>
>
>

Re: [PATCH] pinctrl: rockchip: Add rk3328 pinctrl support

[David.Wu]

Hi Heiko,

Sorry for late reply because of the holiday.

>> @@ -355,6 +359,24 @@ struct rockchip_pinctrl {
>>  	unsigned int			nfunctions;
>>  };
>>
>> +/**
>> + * struct rockchip_mux_recalced_data: represent a pin iomux data.
>> + * @num: bank num.
>> + * @bit: index at register or used to calc index.
>> + * @min_pin: the min pin.
>> + * @max_pin: the max pin.
>> + * @reg: the register offset.
>> + * @mask: mask bit
>> + */
>> +struct rockchip_mux_recalced_data {
>> +	u8 num;
>> +	u8 bit;
>> +	int min_pin;
>> +	int max_pin;
>> +	int reg;
>> +	int mask;
>
> please reorganize
> 	num, min_pin, max_pin are the queried values
> while
> 	reg, bit, mask are the result values
>
> Mixing these makes it hard to understand. Same for the table below.
>

How about this struct?
struct rockchip_mux_recalced_data {
	struct {
		u8 num;
		int pin;
	} querie;
	struct {
		u8 reg;
		u8 bit;
		u8 mask;
	} result;
};

>
>> +};
>> +
>>  static struct regmap_config rockchip_regmap_config = {
>>  	.reg_bits = 32,
>>  	.val_bits = 32,
>> @@ -514,13 +536,83 @@ static void rockchip_dt_free_map(struct pinctrl_dev
>> *pctldev, * Hardware access
>>   */
>>
>> +static const struct rockchip_mux_recalced_data rk3328_mux_recalced_data[] =
>> { +	{
>> +		.num = 2,
>> +		.bit = 0x2,
>> +		.min_pin = 8,
>> +		.max_pin = 14,
>> +		.reg = 0x24,
>> +		.mask = 0x3
>> +	},
>> +	{
>> +		.num = 2,
>> +		.bit = 0,
>> +		.min_pin = 15,
>> +		.max_pin = 15,
>> +		.reg = 0x28,
>> +		.mask = 0x7
>> +	},
>> +	{
>
> nit: coding style, "}, {"
>
>
>> +		.num = 2,
>> +		.bit = 14,
>> +		.min_pin = 23,
>> +		.max_pin = 23,
>> +		.reg = 0x30,
>> +		.mask = 0x3
>> +	},
>> +	{
>> +		.num = 3,
>> +		.bit = 0,
>> +		.min_pin = 8,
>> +		.max_pin = 8,
>> +		.reg = 0x40,
>> +		.mask = 0x7
>> +	},
>> +	{
>> +		.num = 3,
>> +		.bit = 0x2,
>> +		.min_pin = 9,
>> +		.max_pin = 15,
>> +		.reg = 0x44,
>> +		.mask = 0x3
>
> I think I don't fully understand what this is supposed to do. In the TRM you
> send me at 0x44 all bits are marked as reserved and the other registers also
> look very strange.

Sorry, there is a wrong description in my patch.
The reserved pins are not opened at rk3328 soc, could not be used, but 
they appear in my code, this makes you confused.

There are three pins need to be recalculated from the the latest GRF i 
sent to you just now.
  - gpio2_b4
  - gpio2_b7
  - gpio2_c7

So, the max_pin and min_pin changes to pin in the 
"rockchip_mux_recalced_data" struct, because there are no serial pins to 
be recalculated, but three single pins.

>
> I guess GPIO2CH_IOMUX shows the thing you're trying solve, with gpio2_c6 being
> at [5:3] but gpio2_c7 got moved to [15:14] out of its natural position.
> Chip designers have strange ideas it seems.

Yes, it is very strange here, not so well-regulated.

>
>
> Heiko
>
>
>