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authorLaurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>2014-01-27 22:04:17 +0100
committerLaurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>2014-04-16 12:03:19 +0200
commitde693461bf9624ec12808f8c5524510364cc2a43 (patch)
treea70316a3c82329956d7e591bb23ba8a91a7953cd /drivers/clocksource/sh_tmu.c
parentclocksource: sh_tmu: Constify name argument to sh_tmu_register() (diff)
downloadlinux-de693461bf9624ec12808f8c5524510364cc2a43.tar.xz
linux-de693461bf9624ec12808f8c5524510364cc2a43.zip
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>
Diffstat (limited to 'drivers/clocksource/sh_tmu.c')
-rw-r--r--drivers/clocksource/sh_tmu.c30
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;
}