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clocksource: sh_tmu: Replace hardcoded register values with macros 

Define symbolic macros for all used registers bits.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
This commit is contained in:
Laurent Pinchart 2014-01-29 00:33:08 +01:00
parent a5de49f436
commit 5cfe2d151f
1 changed files with 14 additions and 5 deletions
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19
drivers/clocksource/sh_tmu.c
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@ -69,6 +69,15 @@ static DEFINE_RAW_SPINLOCK(sh_tmu_lock);
#define TCNT 1 /* channel register */
#define TCR 2 /* channel register */
#define TCR_UNF (1 << 8)
#define TCR_UNIE (1 << 5)
#define TCR_TPSC_CLK4 (0 << 0)
#define TCR_TPSC_CLK16 (1 << 0)
#define TCR_TPSC_CLK64 (2 << 0)
#define TCR_TPSC_CLK256 (3 << 0)
#define TCR_TPSC_CLK1024 (4 << 0)
#define TCR_TPSC_MASK (7 << 0)
static inline unsigned long sh_tmu_read(struct sh_tmu_channel *ch, int reg_nr)
{
unsigned long offs;
@ -140,7 +149,7 @@ static int __sh_tmu_enable(struct sh_tmu_channel *ch)
/* configure channel to parent clock / 4, irq off */
ch->rate = clk_get_rate(ch->tmu->clk) / 4;
sh_tmu_write(ch, TCR, 0x0000);
sh_tmu_write(ch, TCR, TCR_TPSC_CLK4);
/* enable channel */
sh_tmu_start_stop_ch(ch, 1);
@ -165,7 +174,7 @@ static void __sh_tmu_disable(struct sh_tmu_channel *ch)
sh_tmu_start_stop_ch(ch, 0);
/* disable interrupts in TMU block */
sh_tmu_write(ch, TCR, 0x0000);
sh_tmu_write(ch, TCR, TCR_TPSC_CLK4);
/* stop clock */
clk_disable(ch->tmu->clk);
@ -195,7 +204,7 @@ static void sh_tmu_set_next(struct sh_tmu_channel *ch, unsigned long delta,
sh_tmu_read(ch, TCR);
/* enable interrupt */
sh_tmu_write(ch, TCR, 0x0020);
sh_tmu_write(ch, TCR, TCR_UNIE | TCR_TPSC_CLK4);
/* reload delta value in case of periodic timer */
if (periodic)
@ -215,9 +224,9 @@ static irqreturn_t sh_tmu_interrupt(int irq, void *dev_id)
/* disable or acknowledge interrupt */
if (ch->ced.mode == CLOCK_EVT_MODE_ONESHOT)
sh_tmu_write(ch, TCR, 0x0000);
sh_tmu_write(ch, TCR, TCR_TPSC_CLK4);
else
sh_tmu_write(ch, TCR, 0x0020);
sh_tmu_write(ch, TCR, TCR_UNIE | TCR_TPSC_CLK4);
/* notify clockevent layer */
ch->ced.event_handler(&ch->ced);