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clocksource: sh_tmu: Allocate channels dynamically 

This prepares the driver for multi-channel support.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
This commit is contained in:
Laurent Pinchart 2014-01-27 22:04:17 +01:00
parent 3b77a83eea
commit a5de49f436
1 changed files with 20 additions and 7 deletions
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27
drivers/clocksource/sh_tmu.c
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@ -58,7 +58,8 @@ struct sh_tmu_device {
void __iomem *mapbase; void __iomem *mapbase;
struct clk *clk; struct clk *clk;
struct sh_tmu_channel channel; struct sh_tmu_channel *channels;
unsigned int num_channels;
}; };
static DEFINE_RAW_SPINLOCK(sh_tmu_lock); 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 sh_timer_config *cfg = pdev->dev.platform_data;
struct resource *res; struct resource *res;
void __iomem *base;
int ret; int ret;
ret = -ENXIO; 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. * start/stop shared register.
*/ */
tmu->channel.base = ioremap_nocache(res->start, resource_size(res)); base = ioremap_nocache(res->start, resource_size(res));
if (tmu->channel.base == NULL) { if (base == NULL) {
dev_err(&tmu->pdev->dev, "failed to remap I/O memory\n"); dev_err(&tmu->pdev->dev, "failed to remap I/O memory\n");
goto err0; goto err0;
} }
tmu->mapbase = tmu->channel.base - cfg->channel_offset; tmu->mapbase = base - cfg->channel_offset;
/* get hold of clock */ /* get hold of clock */
tmu->clk = clk_get(&tmu->pdev->dev, "tmu_fck"); 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) if (ret < 0)
goto err2; 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) if (ret < 0)
goto err3; goto err3;
return 0; return 0;
err3: err3:
kfree(tmu->channels);
clk_unprepare(tmu->clk); clk_unprepare(tmu->clk);
err2: err2:
clk_put(tmu->clk); clk_put(tmu->clk);
err1: err1:
iounmap(tmu->channel.base); iounmap(base);
err0: err0:
return ret; return ret;
} }