From 33ddfc059ee310640ef33c1a92dddaa1af84324d Mon Sep 17 00:00:00 2001 From: Nick Hu Date: Wed, 30 Oct 2024 15:58:36 +0800 Subject: [PATCH] driver: sifive ccache: enable TRUNKCLOCKGATE and REGIONCLOCKGATE Enable the clock gating bit of ccache when the platform has the ccache0. Signed-off-by: Nick Hu Reviewed-by: Leo Yu-Chi Liang --- 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 cc00b80f60..2ff5ca701d 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 }, {} }; -- 2.39.5