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authorMarek Vasut <marek.vasut+renesas@gmail.com>2018-08-24 21:20:31 +0200
committerMarek Vasut <marex@denx.de>2018-09-15 03:19:07 +0200
commiteb05dcfea29bbafbc9f8ce3b7894e3e53f35d743 (patch)
tree1100e9cc334c2b7dc347cb6c9921a96bea3a852f /arch
parentd1da5d6cd8d33f777cf8374bf070970c4cca32e1 (diff)
sh: tmu: Simplify the tmu_bit math
The tmu_bit value evaluates to (ffs(4) >> 1) - 1 = (3 >> 1) - 1 = 0. Just drop the tmu_bit completely as well as CONFIG_SYS_TMU_CLK_DIV. Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Diffstat (limited to 'arch')
-rw-r--r--arch/sh/lib/time.c7
1 files changed, 2 insertions, 5 deletions
diff --git a/arch/sh/lib/time.c b/arch/sh/lib/time.c
index aac79889dc..302f6bed83 100644
--- a/arch/sh/lib/time.c
+++ b/arch/sh/lib/time.c
@@ -16,14 +16,12 @@
#include <sh_tmu.h>
#define TCR_TPSC 0x07
-#define CONFIG_SYS_TMU_CLK_DIV 4
static struct tmu_regs *tmu = (struct tmu_regs *)TMU_BASE;
unsigned long get_tbclk(void)
{
- u16 tmu_bit = (ffs(CONFIG_SYS_TMU_CLK_DIV) >> 1) - 1;
- return get_tmu0_clk_rate() >> ((tmu_bit + 1) * 2);
+ return get_tmu0_clk_rate() >> 2;
}
unsigned long timer_read_counter(void)
@@ -47,8 +45,7 @@ static void tmu_timer_stop(unsigned int timer)
int timer_init(void)
{
- u16 tmu_bit = (ffs(CONFIG_SYS_TMU_CLK_DIV) >> 1) - 1;
- writew((readw(&tmu->tcr0) & ~TCR_TPSC) | tmu_bit, &tmu->tcr0);
+ writew(readw(&tmu->tcr0) & ~TCR_TPSC, &tmu->tcr0);
tmu_timer_stop(0);
tmu_timer_start(0);