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Subject[PATCH 29/71] clocksource: sh_tmu: Allocate channels dynamically
Date
From: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>

This prepares the driver for multi-channel support.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
---
drivers/clocksource/sh_tmu.c | 27 ++++++++++++++++++++-------
1 file changed, 20 insertions(+), 7 deletions(-)

diff --git a/drivers/clocksource/sh_tmu.c b/drivers/clocksource/sh_tmu.c
index 26a9f7d..55b7a37 100644
--- a/drivers/clocksource/sh_tmu.c
+++ b/drivers/clocksource/sh_tmu.c
@@ -58,7 +58,8 @@ struct sh_tmu_device {
void __iomem *mapbase;
struct clk *clk;

- struct sh_tmu_channel channel;
+ struct sh_tmu_channel *channels;
+ unsigned int num_channels;
};

static DEFINE_RAW_SPINLOCK(sh_tmu_lock);
@@ -469,6 +470,7 @@ static int sh_tmu_setup(struct sh_tmu_device *tmu, struct platform_device *pdev)
{
struct sh_timer_config *cfg = pdev->dev.platform_data;
struct resource *res;
+ void __iomem *base;
int ret;
ret = -ENXIO;

@@ -488,16 +490,16 @@ static int sh_tmu_setup(struct sh_tmu_device *tmu, struct platform_device *pdev)
}

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

- tmu->mapbase = tmu->channel.base - cfg->channel_offset;
+ tmu->mapbase = base - cfg->channel_offset;

/* get hold of clock */
tmu->clk = clk_get(&tmu->pdev->dev, "tmu_fck");
@@ -511,18 +513,29 @@ static int sh_tmu_setup(struct sh_tmu_device *tmu, struct platform_device *pdev)
if (ret < 0)
goto err2;

- ret = sh_tmu_channel_setup(&tmu->channel, tmu);
+ tmu->channels = kzalloc(sizeof(*tmu->channels), GFP_KERNEL);
+ if (tmu->channels == NULL) {
+ ret = -ENOMEM;
+ goto err3;
+ }
+
+ tmu->num_channels = 1;
+
+ tmu->channels[0].base = base;
+
+ ret = sh_tmu_channel_setup(&tmu->channels[0], tmu);
if (ret < 0)
goto err3;

return 0;

err3:
+ kfree(tmu->channels);
clk_unprepare(tmu->clk);
err2:
clk_put(tmu->clk);
err1:
- iounmap(tmu->channel.base);
+ iounmap(base);
err0:
return ret;
}
--
1.7.9.5


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