[PATCH 7/7] pinctrl: sh-pfc: Confine legacy function GPIOs to SH

[Geert Uytterhoeven <geert+renesas@glider.be>]

Legacy function GPIOs are no longer used on ARM since commit
a27c5cd1a08cc95c ("sh-pfc: sh73a0: Remove function GPIOs").
Extract its setup code into a separate function, and make all function
GPIO related code and data depend on CONFIG_SUPERH.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
---
Compile-tested on sh using se7724_defconfig.
---
 drivers/pinctrl/sh-pfc/core.h   |  2 ++
 drivers/pinctrl/sh-pfc/gpio.c   | 39 ++++++++++++++++++++++++++++-----------
 drivers/pinctrl/sh-pfc/sh_pfc.h |  2 ++
 3 files changed, 32 insertions(+), 11 deletions(-)

diff --git a/drivers/pinctrl/sh-pfc/core.h b/drivers/pinctrl/sh-pfc/core.h
index 4c3c37bf7161804d..c38ace46d7111b0d 100644
--- a/drivers/pinctrl/sh-pfc/core.h
+++ b/drivers/pinctrl/sh-pfc/core.h
@@ -46,7 +46,9 @@ struct sh_pfc {
 	unsigned int nr_gpio_pins;
 
 	struct sh_pfc_chip *gpio;
+#ifdef CONFIG_SUPERH
 	struct sh_pfc_chip *func;
+#endif
 
 	struct sh_pfc_pinctrl *pinctrl;
 };
diff --git a/drivers/pinctrl/sh-pfc/gpio.c b/drivers/pinctrl/sh-pfc/gpio.c
index 30654e800580524d..15f4eea186e2ba56 100644
--- a/drivers/pinctrl/sh-pfc/gpio.c
+++ b/drivers/pinctrl/sh-pfc/gpio.c
@@ -290,6 +290,7 @@ static int gpio_pin_setup(struct sh_pfc_chip *chip)
  * Function GPIOs
  */
 
+#ifdef CONFIG_SUPERH
 static int gpio_function_request(struct gpio_chip *gc, unsigned offset)
 {
 	static bool __print_once;
@@ -330,6 +331,31 @@ static int gpio_function_setup(struct sh_pfc_chip *chip)
 	return 0;
 }
 
+static int sh_pfc_add_function_gpios(struct sh_pfc *pfc)
+{
+	struct sh_pfc_chip *chip;
+
+	if (!pfc->info->nr_func_gpios)
+		return 0;
+
+	chip = sh_pfc_add_gpiochip(pfc, gpio_function_setup, NULL);
+	if (IS_ERR(chip))
+		return PTR_ERR(chip);
+
+	pfc->func = chip;
+
+	return 0;
+}
+
+static void sh_pfc_remove_function_gpios(struct sh_pfc *pfc)
+{
+	gpiochip_remove(&pfc->func->gpio_chip);
+}
+#else
+static inline int sh_pfc_add_function_gpios(struct sh_pfc *pfc) { return 0; }
+static inline int sh_pfc_remove_function_gpios(struct sh_pfc *pfc) { return 0; }
+#endif
+
 /* -----------------------------------------------------------------------------
  * Register/unregister
  */
@@ -397,22 +423,13 @@ int sh_pfc_register_gpiochip(struct sh_pfc *pfc)
 	}
 
 	/* Register the function GPIOs chip. */
-	if (pfc->info->nr_func_gpios == 0)
-		return 0;
-
-	chip = sh_pfc_add_gpiochip(pfc, gpio_function_setup, NULL);
-	if (IS_ERR(chip))
-		return PTR_ERR(chip);
-
-	pfc->func = chip;
-
-	return 0;
+	return sh_pfc_add_function_gpios(pfc);
 }
 
 int sh_pfc_unregister_gpiochip(struct sh_pfc *pfc)
 {
 	gpiochip_remove(&pfc->gpio->gpio_chip);
-	gpiochip_remove(&pfc->func->gpio_chip);
+	sh_pfc_remove_function_gpios(pfc);
 
 	return 0;
 }
diff --git a/drivers/pinctrl/sh-pfc/sh_pfc.h b/drivers/pinctrl/sh-pfc/sh_pfc.h
index c7508d5f688613b2..c6f9163b3e23041f 100644
--- a/drivers/pinctrl/sh-pfc/sh_pfc.h
+++ b/drivers/pinctrl/sh-pfc/sh_pfc.h
@@ -138,8 +138,10 @@ struct sh_pfc_soc_info {
 	const struct sh_pfc_function *functions;
 	unsigned int nr_functions;
 
+#ifdef CONFIG_SUPERH
 	const struct pinmux_func *func_gpios;
 	unsigned int nr_func_gpios;
+#endif
 
 	const struct pinmux_cfg_reg *cfg_regs;
 	const struct pinmux_data_reg *data_regs;
-- 
1.9.1