Re: [PATCH v2 14/28] pinctrl: renesas: rzg2l: index all registers based on port offset

Geert Uytterhoeven
2023-10-04T12:53:10Z

Hi Claudiu,

On Fri, Sep 29, 2023 at 7:39 AM Claudiu <claudiu.beznea@tuxon.dev> wrote:
> From: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
>
> To get address that needs to be read/write for specific port
> functionalities the P(), PM(), PMC(), PFC(), PIN(), IOLH() IEN(), ISEL()
> macros are used. Some of these macros received as argument the hardware
> port identifier, some hardware port offset address (e.g. ISEL() received
> port identifier, IOLH() received port offset address). This makes hard to
> extend the current driver for SoCs were port identifiers are not continuous
> in memory map of pin controller. This is the case for RZ/G3S pin controller
> were ports are mapped as follows:
>
> port offset port identifier
> ----------- ---------------
> 0x20 P0
> 0x21 P5
> 0x22 P6
> 0x23 P11
> 0x24 P12
> 0x25 P13
> 0x26 P14
> 0x27 P15
> 0x28 P16
> 0x29 P17
> 0x2a P18
> 0x30 P1
> 0x31 P2
> 0x32 P3
> 0x33 P4
> 0x34 P7
> 0x35 P8
> 0x36 P8
> 0x37 P10
>
> To make this achievable change all the above macros used to get the address
> of a port register for specific port functionality based on port hardware
> address. Shortly, all the above macros will get as argument the port
> offset address listed in the above table.
>
> With this RZG2L_SINGLE_PIN_GET_PORT_OFFSET(), RZG2L_PIN_ID_TO_PORT_OFFSET()
> and RZG2L_GPIO_PORT_GET_INDEX() were replaced by
> RZG2L_PIN_CFG_TO_PORT_OFFSET(), RZG2L_SINGLE_PIN_GET_CFGS() and
> RZG2L_GPIO_PORT_GET_CFGS() were replaced by RZG2L_PIN_CFG_TO_CAPS().
>
> Also rzg2l_pinctrl_set_pfc_mode() don't need port argument anymore.
> Also rzg2l_gpio_direction_input() and rzg2l_gpio_direction_output() don't
> need to translate port and bit locally as this can be done by
> rzg2l_gpio_set_direction().
>
> To use the same naming for port, bit/pin and register offset the
> port_offset variable names in different places was replaced by variable
> named off and there is no need to initialize anymore cfg and bit in
> different code places.
>
> Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
> Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
> Tested-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
> ---
>
> Changes in v2:
> - mentioned in commit description about the replacement of
> RZG2L_GPIO_PORT_GET_INDEX() with RZG2L_PIN_CFG_TO_PORT_OFFSET()
> - moved variable declaration inside for()
> - got rid of local variable and used directly RZG2L_PIN_ID_TO_PORT() in
> debug message from rzg2l_pinctrl_set_mux() function
> - collected tags

Thanks for the update! Sill queue in renesas-pinctrl-for-v6.7.

> --- a/drivers/pinctrl/renesas/pinctrl-rzg2l.c
> +++ b/drivers/pinctrl/renesas/pinctrl-rzg2l.c
> @@ -202,9 +202,11 @@ static int rzg2l_pinctrl_set_mux(struct pinctrl_dev *pctldev,
> unsigned int group_selector)
> {
> struct rzg2l_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
> + const struct pinctrl_pin_desc *pin_desc;
> + unsigned int *psel_val, *pin_data;
> struct function_desc *func;
> - unsigned int i, *psel_val;
> struct group_desc *group;
> + u32 pin, off;
> int *pins;
>
> func = pinmux_generic_get_function(pctldev, func_selector);
> @@ -217,12 +219,17 @@ static int rzg2l_pinctrl_set_mux(struct pinctrl_dev *pctldev,
> psel_val = func->data;
> pins = group->pins;
>
> - for (i = 0; i < group->num_pins; i++) {
> - dev_dbg(pctrl->dev, "port:%u pin: %u PSEL:%u\n",
> - RZG2L_PIN_ID_TO_PORT(pins[i]), RZG2L_PIN_ID_TO_PIN(pins[i]),
> - psel_val[i]);
> - rzg2l_pinctrl_set_pfc_mode(pctrl, RZG2L_PIN_ID_TO_PORT(pins[i]),
> - RZG2L_PIN_ID_TO_PIN(pins[i]), psel_val[i]);
> + for (unsigned int i = 0; i < group->num_pins; i++) {
> + pin_desc = &pctrl->desc.pins[pins[i]];
> + pin_data = pin_desc->drv_data;
> +
> + pin = RZG2L_PIN_ID_TO_PIN(pins[i]);
> + off = RZG2L_PIN_CFG_TO_PORT_OFFSET(*pin_data);

In my comments on v1, I actually meant to combine these assignments
to variables with the variable declarations. I will handle that while applying.

> +
> + dev_dbg(pctrl->dev, "port:%u pin: %u off:%x PSEL:%u\n",
> + RZG2L_PIN_ID_TO_PORT(pins[i]), pin, off, psel_val[i]);
> +
> + rzg2l_pinctrl_set_pfc_mode(pctrl, pin, off, psel_val[i]);
> }
>
> return 0;

Gr{oetje,eeting}s,

Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds