Enable the clock gating bit of ccache when the platform has the ccache0.
Signed-off-by: Nick Hu nick.hu@sifive.com --- drivers/cache/cache-sifive-ccache.c | 33 ++++++++++++++++++++++++++--- 1 file changed, 30 insertions(+), 3 deletions(-)
diff --git a/drivers/cache/cache-sifive-ccache.c b/drivers/cache/cache-sifive-ccache.c index cc00b80f60b..2ff5ca701d6 100644 --- a/drivers/cache/cache-sifive-ccache.c +++ b/drivers/cache/cache-sifive-ccache.c @@ -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 }, {} };