pinctrl: sh-pfc: Use u32 to store register addresses

Currently all PFC registers lie in low 32-bit address space. Hence use
u32 instead of unsigned long to store PFC register addresses in pinctrl
tables.  All calculations of virtual addresses use a phys_addr_t
intermediate, so we know where to add an offset if the 32-bit assumption
ever becomes false.

While this doesn't impact 32-bit builds, it would save ca. 7 KiB on a
64-bit shmobile_defconfig kernel.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

3 files changed, 14 insertions, 10 deletions

diff --git a/drivers/pinctrl/sh-pfc/core.c b/drivers/pinctrl/sh-pfc/core.c
index c33e2474a867..1b6dc6922915 100644
--- a/drivers/pinctrl/sh-pfc/core.c
+++ b/drivers/pinctrl/sh-pfc/core.c
@@ -92,10 +92,10 @@ static int sh_pfc_map_resources(struct sh_pfc *pfc,
         return 0;
 }
 
-static void __iomem *sh_pfc_phys_to_virt(struct sh_pfc *pfc,
-                                         unsigned long address)
+static void __iomem *sh_pfc_phys_to_virt(struct sh_pfc *pfc, u32 reg)
 {
         struct sh_pfc_window *window;
+        phys_addr_t address = reg;
         unsigned int i;
 
         /* scan through physical windows and convert address */
@@ -208,7 +208,7 @@ static void sh_pfc_write_config_reg(struct sh_pfc *pfc,
 
         sh_pfc_config_reg_helper(pfc, crp, field, &mapped_reg, &mask, &pos);
 
-        dev_dbg(pfc->dev, "write_reg addr = %lx, value = 0x%x, field = %u, "
+        dev_dbg(pfc->dev, "write_reg addr = %x, value = 0x%x, field = %u, "
                 "r_width = %u, f_width = %u\n",
                 crp->reg, value, field, crp->reg_width, crp->field_width);
 
diff --git a/drivers/pinctrl/sh-pfc/gpio.c b/drivers/pinctrl/sh-pfc/gpio.c
index 5d3a35ce0912..ba353735ecf2 100644
--- a/drivers/pinctrl/sh-pfc/gpio.c
+++ b/drivers/pinctrl/sh-pfc/gpio.c
@@ -62,7 +62,8 @@ static void gpio_get_data_reg(struct sh_pfc_chip *chip, unsigned int offset,
 static u32 gpio_read_data_reg(struct sh_pfc_chip *chip,
                               const struct pinmux_data_reg *dreg)
 {
-        void __iomem *mem = dreg->reg - chip->mem->phys + chip->mem->virt;
+        phys_addr_t address = dreg->reg;
+        void __iomem *mem = address - chip->mem->phys + chip->mem->virt;
 
         return sh_pfc_read_raw_reg(mem, dreg->reg_width);
 }
@@ -70,7 +71,8 @@ static u32 gpio_read_data_reg(struct sh_pfc_chip *chip,
 static void gpio_write_data_reg(struct sh_pfc_chip *chip,
                                 const struct pinmux_data_reg *dreg, u32 value)
 {
-        void __iomem *mem = dreg->reg - chip->mem->phys + chip->mem->virt;
+        phys_addr_t address = dreg->reg;
+        void __iomem *mem = address - chip->mem->phys + chip->mem->virt;
 
         sh_pfc_write_raw_reg(mem, dreg->reg_width, value);
 }
@@ -340,6 +342,7 @@ sh_pfc_add_gpiochip(struct sh_pfc *pfc, int(*setup)(struct sh_pfc_chip *),
 int sh_pfc_register_gpiochip(struct sh_pfc *pfc)
 {
         struct sh_pfc_chip *chip;
+        phys_addr_t address;
         unsigned int i;
         int ret;
 
@@ -351,11 +354,12 @@ int sh_pfc_register_gpiochip(struct sh_pfc *pfc)
          * that covers the data registers. In that case don't try to handle
          * GPIOs.
          */
+        address = pfc->info->data_regs[0].reg;
         for (i = 0; i < pfc->num_windows; ++i) {
                 struct sh_pfc_window *window = &pfc->windows[i];
 
-                if (pfc->info->data_regs[0].reg >= window->phys &&
-                    pfc->info->data_regs[0].reg < window->phys + window->size)
+                if (address >= window->phys &&
+                    address < window->phys + window->size)
                         break;
         }
 
diff --git a/drivers/pinctrl/sh-pfc/sh_pfc.h b/drivers/pinctrl/sh-pfc/sh_pfc.h
index 6aeec8152ea6..c7508d5f6886 100644
--- a/drivers/pinctrl/sh-pfc/sh_pfc.h
+++ b/drivers/pinctrl/sh-pfc/sh_pfc.h
@@ -69,7 +69,7 @@ struct pinmux_func {
 };
 
 struct pinmux_cfg_reg {
-        unsigned long reg;
+        u32 reg;
         u8 reg_width, field_width;
         const u16 *enum_ids;
         const u8 *var_field_width;
@@ -86,7 +86,7 @@ struct pinmux_cfg_reg {
         .enum_ids = (const u16 [])
 
 struct pinmux_data_reg {
-        unsigned long reg;
+        u32 reg;
         u8 reg_width;
         const u16 *enum_ids;
 };
@@ -150,7 +150,7 @@ struct sh_pfc_soc_info {
         const struct pinmux_irq *gpio_irq;
         unsigned int gpio_irq_size;
 
-        unsigned long unlock_reg;
+        u32 unlock_reg;
 };
 
 /* -----------------------------------------------------------------------------