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Davinci: support LPSC SwRstDisable state

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The current clock control code always gates the clock (PSC state Disable = 2)
on clk_disable().  Some on-chip peripherals (e.g. LCD controller on TNETV107X)
need to be put into SwRstDisable = 0 on clock disable, to maintain
hardware sanity.

This patch extends the davinci_psc_config() arguments to pass in the desired
module state instead of a boolean enable/disable.  Further, clk_disable() now
checks for the PSC_SWRSTDISABLE clk flag before selecting the target state.

Signed-off-by: Cyril Chemparathy <cyril@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
This commit is contained in:
Cyril Chemparathy
2010-03-25 17:43:47 -04:00
committed by Kevin Hilman
parent 449ef7f6a9
commit 52958be3ad
4 changed files with 21 additions and 9 deletions
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7
arch/arm/mach-davinci/clock.h
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@ -101,10 +101,11 @@ struct clk {
/* Clock flags: SoC-specific flags start at BIT(16) */
#define ALWAYS_ENABLED BIT(1)
#define CLK_PSC BIT(2)
#define PSC_DSP BIT(3) /* PSC uses DSP domain, not ARM */
#define CLK_PSC BIT(2)
#define PSC_DSP BIT(3) /* PSC uses DSP domain, not ARM */
#define CLK_PLL BIT(4) /* PLL-derived clock */
#define PRE_PLL BIT(5) /* source is before PLL mult/div */
#define PRE_PLL BIT(5) /* source is before PLL mult/div */
#define PSC_SWRSTDISABLE BIT(6) /* Disable state is SwRstDisable */
#define CLK(dev, con, ck) \
{ \