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driver: sifive ccache: enable TRUNKCLOCKGATE and REGIONCLOCKGATE

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Enable the clock gating bit of ccache when the platform has the ccache0.

Signed-off-by: Nick Hu <nick.hu@sifive.com>
Reviewed-by: Leo Yu-Chi Liang <ycliang@andestech.com>
This commit is contained in:
Nick Hu 2024-10-30 15:58:36 +08:00 • committed by Leo Yu-Chi Liang
parent 56accc56b9
commit 33ddfc059e
1 changed files with 30 additions and 3 deletions
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33
drivers/cache/cache-sifive-ccache.c vendored
View file

@ -14,8 +14,17 @@
#define SIFIVE_CCACHE_WAY_ENABLE 0x008
#define SIFIVE_CCACHE_TRUNKCLOCKGATE 0x1000
#define SIFIVE_CCACHE_TRUNKCLOCKGATE_DISABLE BIT(0)
#define SIFIVE_CCACHE_REGIONCLOCKGATE_DISABLE BIT(1)
struct sifive_ccache {
void __iomem *base;
bool has_cg;
};
struct sifive_ccache_quirks {
bool has_cg;
};
static int sifive_ccache_enable(struct udevice *dev)
@ -30,6 +39,14 @@ static int sifive_ccache_enable(struct udevice *dev)
writel(ways - 1, priv->base + SIFIVE_CCACHE_WAY_ENABLE);
if (priv->has_cg) {
/* enable clock gating bits */
config = readl(priv->base + SIFIVE_CCACHE_TRUNKCLOCKGATE);
config &= ~(SIFIVE_CCACHE_TRUNKCLOCKGATE_DISABLE |
SIFIVE_CCACHE_REGIONCLOCKGATE_DISABLE);
writel(config, priv->base + SIFIVE_CCACHE_TRUNKCLOCKGATE);
}
return 0;
}
@ -50,7 +67,9 @@ static const struct cache_ops sifive_ccache_ops = {
static int sifive_ccache_probe(struct udevice *dev)
{
struct sifive_ccache *priv = dev_get_priv(dev);
const struct sifive_ccache_quirks *quirk = (void *)dev_get_driver_data(dev);
priv->has_cg = quirk->has_cg;
priv->base = dev_read_addr_ptr(dev);
if (!priv->base)
return -EINVAL;
@ -58,10 +77,18 @@ static int sifive_ccache_probe(struct udevice *dev)
return 0;
}
static const struct sifive_ccache_quirks fu540_ccache = {
.has_cg = false,
};
static const struct sifive_ccache_quirks ccache0 = {
.has_cg = true,
};
static const struct udevice_id sifive_ccache_ids[] = {
{ .compatible = "sifive,fu540-c000-ccache" },
{ .compatible = "sifive,fu740-c000-ccache" },
{ .compatible = "sifive,ccache0" },
{ .compatible = "sifive,fu540-c000-ccache", .data = (ulong)&fu540_ccache },
{ .compatible = "sifive,fu740-c000-ccache", .data = (ulong)&fu540_ccache },
{ .compatible = "sifive,ccache0", .data = (ulong)&ccache0 },
{}
};