linux-kernel - [PATCH 4/4] pinctrl: samsung: do not offset pinctrl numberspaces

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Message-ID: <20231006125557.212681-5-m.majewski2@samsung.com>
Date:   Fri,  6 Oct 2023 14:55:57 +0200
From:   Mateusz Majewski <m.majewski2@...sung.com>
To:     linux-arm-kernel@...ts.infradead.org,
        linux-samsung-soc@...r.kernel.org, linux-gpio@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     Mateusz Majewski <m.majewski2@...sung.com>,
        Tomasz Figa <tomasz.figa@...il.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Sylwester Nawrocki <s.nawrocki@...sung.com>,
        Alim Akhtar <alim.akhtar@...sung.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Marek Szyprowski <m.szyprowski@...sung.com>
Subject: [PATCH 4/4] pinctrl: samsung: do not offset pinctrl numberspaces

Past versions of this driver have manually calculated base values for
both the pinctrl numberspace and the global GPIO numberspace, giving
both the same values. This was necessary for the global GPIO
numberspace, since its values need to be unique system-wide. However, it
was not necessary for the pinctrl numberspace, since its values only
need to be unique for a single instance of the pinctrl device. It was
just convenient to use the same values for both spaces.

Right now those calculations are only used for the pinctrl numberspace,
since GPIO numberspace bases are selected by the GPIO subsystem.
Therefore, those calculations are unnecessary.

Signed-off-by: Mateusz Majewski <m.majewski2@...sung.com>
---
 drivers/pinctrl/samsung/pinctrl-samsung.c | 15 ++++-----------
 drivers/pinctrl/samsung/pinctrl-samsung.h |  2 --
 2 files changed, 4 insertions(+), 13 deletions(-)

diff --git a/drivers/pinctrl/samsung/pinctrl-samsung.c b/drivers/pinctrl/samsung/pinctrl-samsung.c
index 952aeeebb679..79babbb39ced 100644
--- a/drivers/pinctrl/samsung/pinctrl-samsung.c
+++ b/drivers/pinctrl/samsung/pinctrl-samsung.c
@@ -45,8 +45,6 @@ static struct pin_config {
 	{ "samsung,pin-val", PINCFG_TYPE_DAT },
 };
 
-static unsigned int pin_base;
-
 static int samsung_get_group_count(struct pinctrl_dev *pctldev)
 {
 	struct samsung_pinctrl_drv_data *pmx = pinctrl_dev_get_drvdata(pctldev);
@@ -389,8 +387,7 @@ static void samsung_pinmux_setup(struct pinctrl_dev *pctldev, unsigned selector,
 	func = &drvdata->pmx_functions[selector];
 	grp = &drvdata->pin_groups[group];
 
-	pin_to_reg_bank(drvdata, grp->pins[0] - drvdata->pin_base,
-			&reg, &pin_offset, &bank);
+	pin_to_reg_bank(drvdata, grp->pins[0], &reg, &pin_offset, &bank);
 	type = bank->type;
 	mask = (1 << type->fld_width[PINCFG_TYPE_FUNC]) - 1;
 	shift = pin_offset * type->fld_width[PINCFG_TYPE_FUNC];
@@ -441,8 +438,7 @@ static int samsung_pinconf_rw(struct pinctrl_dev *pctldev, unsigned int pin,
 	unsigned long flags;
 
 	drvdata = pinctrl_dev_get_drvdata(pctldev);
-	pin_to_reg_bank(drvdata, pin - drvdata->pin_base, &reg_base,
-					&pin_offset, &bank);
+	pin_to_reg_bank(drvdata, pin, &reg_base, &pin_offset, &bank);
 	type = bank->type;
 
 	if (cfg_type >= PINCFG_TYPE_NUM || !type->fld_width[cfg_type])
@@ -671,7 +667,7 @@ static int samsung_add_pin_ranges(struct gpio_chip *gc)
 
 	bank->grange.name = bank->name;
 	bank->grange.id = bank->id;
-	bank->grange.pin_base = bank->drvdata->pin_base + bank->pin_base;
+	bank->grange.pin_base = bank->pin_base;
 	bank->grange.base = gc->base;
 	bank->grange.npins = bank->nr_pins;
 	bank->grange.gc = &bank->gpio_chip;
@@ -891,7 +887,7 @@ static int samsung_pinctrl_register(struct platform_device *pdev,
 
 	/* dynamically populate the pin number and pin name for pindesc */
 	for (pin = 0, pdesc = pindesc; pin < ctrldesc->npins; pin++, pdesc++)
-		pdesc->number = pin + drvdata->pin_base;
+		pdesc->number = pin;
 
 	/*
 	 * allocate space for storing the dynamically generated names for all
@@ -1129,9 +1125,6 @@ samsung_pinctrl_get_soc_data(struct samsung_pinctrl_drv_data *d,
 
 	samsung_banks_node_get(&pdev->dev, d);
 
-	d->pin_base = pin_base;
-	pin_base += d->nr_pins;
-
 	return ctrl;
 }
 
diff --git a/drivers/pinctrl/samsung/pinctrl-samsung.h b/drivers/pinctrl/samsung/pinctrl-samsung.h
index 173db20f70d3..9b3db50adef3 100644
--- a/drivers/pinctrl/samsung/pinctrl-samsung.h
+++ b/drivers/pinctrl/samsung/pinctrl-samsung.h
@@ -269,7 +269,6 @@ struct samsung_pin_ctrl {
  * @nr_groups: number of such pin groups.
  * @pmx_functions: list of pin functions available to the driver.
  * @nr_function: number of such pin functions.
- * @pin_base: starting system wide pin number.
  * @nr_pins: number of pins supported by the controller.
  * @retention_ctrl: retention control runtime data.
  * @suspend: platform specific suspend callback, executed during pin controller
@@ -293,7 +292,6 @@ struct samsung_pinctrl_drv_data {
 
 	struct samsung_pin_bank		*pin_banks;
 	unsigned int			nr_banks;
-	unsigned int			pin_base;
 	unsigned int			nr_pins;
 
 	struct samsung_retention_ctrl	*retention_ctrl;
-- 
2.42.0