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authorMagnus Damm <damm@igel.co.jp>2009-04-29 14:50:37 +0000
committerPaul Mundt <lethal@linux-sh.org>2009-04-30 12:57:30 +0900
commit3014f47460ecfb13d4169daae51f26a20bacfa17 (patch)
tree3c5c77d96a03f4c64437a984fa07ba857280f554 /drivers/clocksource
parente6be3a25861429166f945499c7ee616875bc3db9 (diff)
clocksource: sh_cmt 16-bit fixes
This patch contains various fixes for 16-bit cmt hardware. With this applied periodic clockevents work fine on sh7203. Signed-off-by: Magnus Damm <damm@igel.co.jp> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'drivers/clocksource')
-rw-r--r--drivers/clocksource/sh_cmt.c12
1 files changed, 7 insertions, 5 deletions
diff --git a/drivers/clocksource/sh_cmt.c b/drivers/clocksource/sh_cmt.c
index bf3e4c11fd3..4ff1508e5ab 100644
--- a/drivers/clocksource/sh_cmt.c
+++ b/drivers/clocksource/sh_cmt.c
@@ -158,16 +158,18 @@ static int sh_cmt_enable(struct sh_cmt_priv *p, unsigned long *rate)
pr_err("sh_cmt: cannot enable clock \"%s\"\n", cfg->clk);
return ret;
}
- *rate = clk_get_rate(p->clk) / 8;
/* make sure channel is disabled */
sh_cmt_start_stop_ch(p, 0);
/* configure channel, periodic mode and maximum timeout */
- if (p->width == 16)
- sh_cmt_write(p, CMCSR, 0);
- else
+ if (p->width == 16) {
+ *rate = clk_get_rate(p->clk) / 512;
+ sh_cmt_write(p, CMCSR, 0x43);
+ } else {
+ *rate = clk_get_rate(p->clk) / 8;
sh_cmt_write(p, CMCSR, 0x01a4);
+ }
sh_cmt_write(p, CMCOR, 0xffffffff);
sh_cmt_write(p, CMCNT, 0);
@@ -615,7 +617,7 @@ static int sh_cmt_setup(struct sh_cmt_priv *p, struct platform_device *pdev)
if (resource_size(res) == 6) {
p->width = 16;
p->overflow_bit = 0x80;
- p->clear_bits = ~0xc0;
+ p->clear_bits = ~0x80;
} else {
p->width = 32;
p->overflow_bit = 0x8000;