From: Albrecht Dreß Date: Thu, 12 Nov 2009 20:31:35 +0000 (-0700) Subject: mpc5200/gpt: tiny fix for gpt period limitation X-Git-Tag: v2.6.33-rc1~279^2~26 X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=690b846aa1b42b4f35bfac0022b75a288d97fd13;p=karo-tx-linux.git mpc5200/gpt: tiny fix for gpt period limitation This patch changes the period parameter of mpc52xx_gpt_start_timer to a u64 to support larger timeout periods. Signed-off-by: Albrecht Dreß Signed-off-by: Grant Likely --- diff --git a/arch/powerpc/include/asm/mpc52xx.h b/arch/powerpc/include/asm/mpc52xx.h index 707ab7590cfb..933fb8f6e797 100644 --- a/arch/powerpc/include/asm/mpc52xx.h +++ b/arch/powerpc/include/asm/mpc52xx.h @@ -279,7 +279,7 @@ extern void mpc52xx_restart(char *cmd); /* mpc52xx_gpt.c */ struct mpc52xx_gpt_priv; extern struct mpc52xx_gpt_priv *mpc52xx_gpt_from_irq(int irq); -extern int mpc52xx_gpt_start_timer(struct mpc52xx_gpt_priv *gpt, int period, +extern int mpc52xx_gpt_start_timer(struct mpc52xx_gpt_priv *gpt, u64 period, int continuous); extern void mpc52xx_gpt_stop_timer(struct mpc52xx_gpt_priv *gpt); diff --git a/arch/powerpc/platforms/52xx/mpc52xx_gpt.c b/arch/powerpc/platforms/52xx/mpc52xx_gpt.c index 2c3fa13571ce..77572abca6c3 100644 --- a/arch/powerpc/platforms/52xx/mpc52xx_gpt.c +++ b/arch/powerpc/platforms/52xx/mpc52xx_gpt.c @@ -378,12 +378,12 @@ EXPORT_SYMBOL(mpc52xx_gpt_from_irq); /** * mpc52xx_gpt_start_timer - Set and enable the GPT timer * @gpt: Pointer to gpt private data structure - * @period: period of timer + * @period: period of timer in ns; max. ~130s @ 33MHz IPB clock * @continuous: set to 1 to make timer continuous free running * * An interrupt will be generated every time the timer fires */ -int mpc52xx_gpt_start_timer(struct mpc52xx_gpt_priv *gpt, int period, +int mpc52xx_gpt_start_timer(struct mpc52xx_gpt_priv *gpt, u64 period, int continuous) { u32 clear, set; @@ -400,7 +400,7 @@ int mpc52xx_gpt_start_timer(struct mpc52xx_gpt_priv *gpt, int period, * arithmatic is done here to preserve the precision until the value * is scaled back down into the u32 range. Period is in 'ns', bus * frequency is in Hz. */ - clocks = (u64)period * (u64)gpt->ipb_freq; + clocks = period * (u64)gpt->ipb_freq; do_div(clocks, 1000000000); /* Scale it down to ns range */ /* This device cannot handle a clock count greater than 32 bits */