clocksource: sh_tmu: Add memory base to sh_tmu_channel structure

The channel memory base is channel-specific, add it to the channel
structure in preparation for support of multiple channels per device.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>

1 files changed, 16 insertions, 14 deletions

diff --git a/drivers/clocksource/sh_tmu.c b/drivers/clocksource/sh_tmu.c
index 2c64e3f93f16..a464ed868a68 100644
--- a/drivers/clocksource/sh_tmu.c
+++ b/drivers/clocksource/sh_tmu.c
@@ -40,6 +40,7 @@ struct sh_tmu_device;
 struct sh_tmu_channel {
         struct sh_tmu_device *tmu;
 
+        void __iomem *base;
         int irq;
 
         unsigned long rate;
@@ -68,39 +69,35 @@ static DEFINE_RAW_SPINLOCK(sh_tmu_lock);
 
 static inline unsigned long sh_tmu_read(struct sh_tmu_channel *ch, int reg_nr)
 {
-        struct sh_timer_config *cfg = ch->tmu->pdev->dev.platform_data;
-        void __iomem *base = ch->tmu->mapbase;
         unsigned long offs;
 
         if (reg_nr == TSTR)
-                return ioread8(base - cfg->channel_offset);
+                return ioread8(ch->tmu->mapbase);
 
         offs = reg_nr << 2;
 
         if (reg_nr == TCR)
-                return ioread16(base + offs);
+                return ioread16(ch->base + offs);
         else
-                return ioread32(base + offs);
+                return ioread32(ch->base + offs);
 }
 
 static inline void sh_tmu_write(struct sh_tmu_channel *ch, int reg_nr,
                                 unsigned long value)
 {
-        struct sh_timer_config *cfg = ch->tmu->pdev->dev.platform_data;
-        void __iomem *base = ch->tmu->mapbase;
         unsigned long offs;
 
         if (reg_nr == TSTR) {
-                iowrite8(value, base - cfg->channel_offset);
+                iowrite8(value, ch->tmu->mapbase);
                 return;
         }
 
         offs = reg_nr << 2;
 
         if (reg_nr == TCR)
-                iowrite16(value, base + offs);
+                iowrite16(value, ch->base + offs);
         else
-                iowrite32(value, base + offs);
+                iowrite32(value, ch->base + offs);
 }
 
 static void sh_tmu_start_stop_ch(struct sh_tmu_channel *ch, int start)
@@ -481,13 +478,18 @@ static int sh_tmu_setup(struct sh_tmu_device *tmu, struct platform_device *pdev)
                 goto err0;
         }
 
-        /* map memory, let mapbase point to our channel */
-        tmu->mapbase = ioremap_nocache(res->start, resource_size(res));
-        if (tmu->mapbase == NULL) {
+        /*
+         * Map memory, let channel.base point to our channel and mapbase to the
+         * start/stop shared register.
+         */
+        tmu->channel.base = ioremap_nocache(res->start, resource_size(res));
+        if (tmu->channel.base == NULL) {
                 dev_err(&tmu->pdev->dev, "failed to remap I/O memory\n");
                 goto err0;
         }
 
+        tmu->mapbase = tmu->channel.base - cfg->channel_offset;
+
         /* get hold of clock */
         tmu->clk = clk_get(&tmu->pdev->dev, "tmu_fck");
         if (IS_ERR(tmu->clk)) {
@@ -511,7 +513,7 @@ static int sh_tmu_setup(struct sh_tmu_device *tmu, struct platform_device *pdev)
  err2:
         clk_put(tmu->clk);
  err1:
-        iounmap(tmu->mapbase);
+        iounmap(tmu->channel.base);
  err0:
         return ret;
 }