[PATCH v2 1/5] clk: bcm281xx: add an initialized flag
From: Alex Elder <hidden>
Date: 2014-05-20 12:53:53
Also in:
linux-devicetree, lkml
Subsystem:
common clk framework, the rest · Maintainers:
Michael Turquette, Stephen Boyd, Linus Torvalds
Add a flag that tracks whether a clock has already been initialized. This will be used by the next patch to avoid initializing a clock more than once when it's listed as a prerequisite. Signed-off-by: Alex Elder <redacted> --- drivers/clk/bcm/clk-kona.c | 17 +++++++++++++++-- drivers/clk/bcm/clk-kona.h | 7 +++++++ 2 files changed, 22 insertions(+), 2 deletions(-)
diff --git a/drivers/clk/bcm/clk-kona.c b/drivers/clk/bcm/clk-kona.c
index d603c4e..d8a7f38 100644
--- a/drivers/clk/bcm/clk-kona.c
+++ b/drivers/clk/bcm/clk-kona.c@@ -27,6 +27,9 @@ #define CCU_ACCESS_PASSWORD 0xA5A500 #define CLK_GATE_DELAY_LOOP 2000 +#define clk_is_initialized(_clk) FLAG_TEST((_clk), KONA, INITIALIZED) +#define clk_set_initialized(_clk) FLAG_SET((_clk), KONA, INITIALIZED) + /* Bitfield operations */ /* Produces a mask of set bits covering a range of a 32-bit value */
@@ -1194,13 +1197,23 @@ static bool __peri_clk_init(struct kona_clk *bcm_clk) static bool __kona_clk_init(struct kona_clk *bcm_clk) { + bool ret; + + if (clk_is_initialized(bcm_clk)) + return true; + switch (bcm_clk->type) { case bcm_clk_peri: - return __peri_clk_init(bcm_clk); + ret = __peri_clk_init(bcm_clk); + break; default: + ret = false; BUG(); } - return -EINVAL; + if (ret) + clk_set_initialized(bcm_clk); + + return ret; } /* Set a CCU and all its clocks into their desired initial state */
diff --git a/drivers/clk/bcm/clk-kona.h b/drivers/clk/bcm/clk-kona.h
index 2537b30..10e238d 100644
--- a/drivers/clk/bcm/clk-kona.h
+++ b/drivers/clk/bcm/clk-kona.h@@ -406,6 +406,7 @@ struct kona_clk { struct clk_init_data init_data; /* includes name of this clock */ struct ccu_data *ccu; /* ccu this clock is associated with */ enum bcm_clk_type type; + u32 flags; /* BCM_CLK_KONA_FLAGS_* below */ union { void *data; struct peri_clk_data *peri;
@@ -414,6 +415,12 @@ struct kona_clk { #define to_kona_clk(_hw) \ container_of(_hw, struct kona_clk, hw) +/* + * Kona clock flags: + * INITIALIZED clock has been initialized already + */ +#define BCM_CLK_KONA_FLAGS_INITIALIZED ((u32)1 << 0) /* Clock initialized */ + /* Initialization macro for an entry in a CCU's kona_clks[] array. */ #define KONA_CLK(_ccu_name, _clk_name, _type) \ { \
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1.9.1