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Commit f91f9cd5 authored by Oskar Schirmer's avatar Oskar Schirmer Committed by Thomas Gleixner
Browse files

arm: tcc8k: Fix bus clock calculation 



There are two dividers used to derive bus clock from system clock:
system clock is divided by SCKDIV+1, then by BCKDIV+1. SCKDIV divider
has been ignored up to now, which is no problem as long as it is 0.

Take SCKDIV into account for bus clock calculation.

Signed-off-by: default avatarOskar Schirmer <oskar@linutronix.de>
Cc: bigeasy@linutronix.de
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
parent cfeeb2f9

arch/arm/mach-tcc8k/clock.c

+10 −3
Original line number Diff line number Diff line
@@ -308,10 +308,17 @@ static unsigned long get_rate_sys(struct clk *clk) 


static unsigned long get_rate_bus(struct clk *clk)

{

	unsigned int div;

	unsigned int reg, sdiv, bdiv, rate;



	div = (__raw_readl(CKC_BASE + CLKCTRL_OFFS) >> 4) & 0xff;

	return get_rate_sys(clk) / (div + 1);

	reg = __raw_readl(CKC_BASE + CLKCTRL_OFFS);

	rate = get_rate_sys(clk);

	sdiv = (reg >> 20) & 3;

	if (sdiv)

		rate /= sdiv + 1;

	bdiv = (reg >> 4) & 0xff;

	if (bdiv)

		rate /= bdiv + 1;

	return rate;

}



static unsigned long get_rate_cpu(struct clk *clk)