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Subject[PATCH 42/71] clocksource: sh_mtu2: Add memory base to sh_mtu2_channel structure
Date
From: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>

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>
Tested-by: Wolfram Sang <wsa@sang-engineering.com>
---
drivers/clocksource/sh_mtu2.c | 32 ++++++++++++++++++--------------
1 file changed, 18 insertions(+), 14 deletions(-)

diff --git a/drivers/clocksource/sh_mtu2.c b/drivers/clocksource/sh_mtu2.c
index 2fe3ab4c..97714ce 100644
--- a/drivers/clocksource/sh_mtu2.c
+++ b/drivers/clocksource/sh_mtu2.c
@@ -38,7 +38,10 @@ struct sh_mtu2_device;

struct sh_mtu2_channel {
struct sh_mtu2_device *mtu;
+
+ void __iomem *base;
int irq;
+
struct clock_event_device ced;
};

@@ -74,39 +77,35 @@ static unsigned long mtu2_reg_offs[] = {

static inline unsigned long sh_mtu2_read(struct sh_mtu2_channel *ch, int reg_nr)
{
- struct sh_timer_config *cfg = ch->mtu->pdev->dev.platform_data;
- void __iomem *base = ch->mtu->mapbase;
unsigned long offs;

if (reg_nr == TSTR)
- return ioread8(base + cfg->channel_offset);
+ return ioread8(ch->mtu->mapbase);

offs = mtu2_reg_offs[reg_nr];

if ((reg_nr == TCNT) || (reg_nr == TGR))
- return ioread16(base + offs);
+ return ioread16(ch->base + offs);
else
- return ioread8(base + offs);
+ return ioread8(ch->base + offs);
}

static inline void sh_mtu2_write(struct sh_mtu2_channel *ch, int reg_nr,
unsigned long value)
{
- struct sh_timer_config *cfg = ch->mtu->pdev->dev.platform_data;
- void __iomem *base = ch->mtu->mapbase;
unsigned long offs;

if (reg_nr == TSTR) {
- iowrite8(value, base + cfg->channel_offset);
+ iowrite8(value, ch->mtu->mapbase);
return;
}

offs = mtu2_reg_offs[reg_nr];

if ((reg_nr == TCNT) || (reg_nr == TGR))
- iowrite16(value, base + offs);
+ iowrite16(value, ch->base + offs);
else
- iowrite8(value, base + offs);
+ iowrite8(value, ch->base + offs);
}

static void sh_mtu2_start_stop_ch(struct sh_mtu2_channel *ch, int start)
@@ -315,13 +314,18 @@ static int sh_mtu2_setup(struct sh_mtu2_device *mtu,
goto err0;
}

- /* map memory, let mapbase point to our channel */
- mtu->mapbase = ioremap_nocache(res->start, resource_size(res));
- if (mtu->mapbase == NULL) {
+ /*
+ * Map memory, let channel.base point to our channel and mapbase to the
+ * start/stop shared register.
+ */
+ mtu->channel.base = ioremap_nocache(res->start, resource_size(res));
+ if (mtu->channel.base == NULL) {
dev_err(&mtu->pdev->dev, "failed to remap I/O memory\n");
goto err0;
}

+ mtu->mapbase = mtu->channel.base + cfg->channel_offset;
+
/* get hold of clock */
mtu->clk = clk_get(&mtu->pdev->dev, "mtu2_fck");
if (IS_ERR(mtu->clk)) {
@@ -344,7 +348,7 @@ static int sh_mtu2_setup(struct sh_mtu2_device *mtu,
err2:
clk_put(mtu->clk);
err1:
- iounmap(mtu->mapbase);
+ iounmap(mtu->channel.base);
err0:
return ret;
}
--
1.7.9.5


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