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OMAP2/3 clock: Extend find_idlest() to pass back idle state value

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Current implementation defines clock idle state indicators based on the
cpu information (cpu_is_omap24xx() or cpu_is_omap34xx()) in a system wide
manner. This patch extends the find_idlest() function in clkops to pass
back the idle state indicator for that clock, thus allowing idle state
indicators to be defined on a per clock basis if required.

This is specifically needed on AM35xx devices as the new IPSS clocks
indicates the idle status (0 is idle, 1 is ready) in a way just
opposite to how its handled in OMAP3 (0 is ready, 1 is idle).

Signed-off-by: Ranjith Lohithakshan <ranjithl@ti.com>
[paul@pwsan.com: updated to apply after commit 98c45457 et seq.]
Signed-off-by: Paul Walmsley <paul@pwsan.com>
This commit is contained in:
Ranjith Lohithakshan
2010-02-24 12:05:54 -07:00
committed by Paul Walmsley
parent cde08f81b1
commit 419cc97d36
9 changed files with 52 additions and 23 deletions
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14
arch/arm/mach-omap2/prcm.c
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@ -242,26 +242,22 @@ u32 cm_rmw_mod_reg_bits(u32 mask, u32 bits, s16 module, s16 idx)
* omap2_cm_wait_idlest - wait for IDLEST bit to indicate module readiness
* @reg: physical address of module IDLEST register
* @mask: value to mask against to determine if the module is active
* @idlest: idle state indicator (0 or 1) for the clock
* @name: name of the clock (for printk)
*
* Returns 1 if the module indicated readiness in time, or 0 if it
* failed to enable in roughly MAX_MODULE_ENABLE_WAIT microseconds.
*/
int omap2_cm_wait_idlest(void __iomem *reg, u32 mask, const char *name)
int omap2_cm_wait_idlest(void __iomem *reg, u32 mask, u8 idlest,
const char *name)
{
int i = 0;
int ena = 0;
/*
* 24xx uses 0 to indicate not ready, and 1 to indicate ready.
* 34xx reverses this, just to keep us on our toes
*/
if (cpu_is_omap24xx())
ena = mask;
else if (cpu_is_omap34xx())
if (idlest)
ena = 0;
else
BUG();
ena = mask;
/* Wait for lock */
omap_test_timeout(((__raw_readl(reg) & mask) == ena),