diff options
| author | Samuel Holland <samuel@sholland.org> | 2021-09-01 00:05:21 -0500 |
|---|---|---|
| committer | Maxime Ripard <maxime@cerno.tech> | 2021-09-13 09:03:21 +0200 |
| commit | 8f8163215249cf47d754c550c2ac981a564df105 (patch) | |
| tree | 7c16cb56c4ad02c32a82c087bb5b1c8a860050e5 /drivers/clk/sunxi-ng | |
| parent | 66028ddb94c1717411eb7f84a9648e1a94d2a947 (diff) | |
clk: sunxi-ng: Use a separate lock for each CCU instance
Some platforms have more than one CCU driver loaded: the main CCU, the
PRCM, the display engine, and possibly others. All of these hardware
blocks have separate MMIO spaces, so there is no need to synchronize
between them.
Signed-off-by: Samuel Holland <samuel@sholland.org>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Link: https://lore.kernel.org/r/20210901050526.45673-4-samuel@sholland.org
Diffstat (limited to 'drivers/clk/sunxi-ng')
| -rw-r--r-- | drivers/clk/sunxi-ng/ccu_common.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/drivers/clk/sunxi-ng/ccu_common.c b/drivers/clk/sunxi-ng/ccu_common.c index 88cb569e5835..31af8b6b5286 100644 --- a/drivers/clk/sunxi-ng/ccu_common.c +++ b/drivers/clk/sunxi-ng/ccu_common.c @@ -17,11 +17,10 @@ struct sunxi_ccu { const struct sunxi_ccu_desc *desc; + spinlock_t lock; struct ccu_reset reset; }; -static DEFINE_SPINLOCK(ccu_lock); - void ccu_helper_wait_for_lock(struct ccu_common *common, u32 lock) { void __iomem *addr; @@ -94,6 +93,8 @@ static int sunxi_ccu_probe(struct sunxi_ccu *ccu, struct device *dev, ccu->desc = desc; + spin_lock_init(&ccu->lock); + for (i = 0; i < desc->num_ccu_clks; i++) { struct ccu_common *cclk = desc->ccu_clks[i]; @@ -101,7 +102,7 @@ static int sunxi_ccu_probe(struct sunxi_ccu *ccu, struct device *dev, continue; cclk->base = reg; - cclk->lock = &ccu_lock; + cclk->lock = &ccu->lock; } for (i = 0; i < desc->hw_clks->num ; i++) { @@ -133,7 +134,7 @@ static int sunxi_ccu_probe(struct sunxi_ccu *ccu, struct device *dev, reset->rcdev.owner = dev ? dev->driver->owner : THIS_MODULE; reset->rcdev.nr_resets = desc->num_resets; reset->base = reg; - reset->lock = &ccu_lock; + reset->lock = &ccu->lock; reset->reset_map = desc->resets; ret = reset_controller_register(&reset->rcdev); |