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| author | Benoît Thébaudeau <benoit.thebaudeau@advansee.com> | 2012-09-27 10:27:14 +0000 |
|---|---|---|
| committer | Tom Rini <trini@ti.com> | 2012-10-15 11:54:12 -0700 |
| commit | fac7c817c31e6c60b2e03e8fcb4b745d0c8d10ab (patch) | |
| tree | bd947986d9033381bb3f88857b3add8afde979c7 | |
| parent | 3c76add2628116872befc230cdd4df8e3a6ac5e3 (diff) | |
| download | u-boot-imx-fac7c817c31e6c60b2e03e8fcb4b745d0c8d10ab.zip u-boot-imx-fac7c817c31e6c60b2e03e8fcb4b745d0c8d10ab.tar.gz u-boot-imx-fac7c817c31e6c60b2e03e8fcb4b745d0c8d10ab.tar.bz2 | |
mx25: Clean up clock calculations
Avoid possible overflow in clock calculations, and do not waste calls to lldiv()
to divide simple ulongs.
Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
Cc: Stefano Babic <sbabic@denx.de>
| -rw-r--r-- | arch/arm/cpu/arm926ejs/mx25/generic.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/arch/arm/cpu/arm926ejs/mx25/generic.c b/arch/arm/cpu/arm926ejs/mx25/generic.c index d34e84c..e25a695 100644 --- a/arch/arm/cpu/arm926ejs/mx25/generic.c +++ b/arch/arm/cpu/arm926ejs/mx25/generic.c @@ -80,12 +80,12 @@ ulong imx_get_armclk(void) ulong div; if (cctl & CCM_CCTL_ARM_SRC) - fref = lldiv((fref * 3), 4); + fref = lldiv((u64) fref * 3, 4); div = ((cctl >> CCM_CCTL_ARM_DIV_SHIFT) & CCM_CCTL_ARM_DIV_MASK) + 1; - return lldiv(fref, div); + return fref / div; } ulong imx_get_ahbclk(void) @@ -98,7 +98,7 @@ ulong imx_get_ahbclk(void) div = ((cctl >> CCM_CCTL_AHB_DIV_SHIFT) & CCM_CCTL_AHB_DIV_MASK) + 1; - return lldiv(fref, div); + return fref / div; } ulong imx_get_perclk(int clk) @@ -110,7 +110,7 @@ ulong imx_get_perclk(int clk) div = readl(&ccm->pcdr[CCM_PERCLK_REG(clk)]); div = ((div >> CCM_PERCLK_SHIFT(clk)) & CCM_PERCLK_MASK) + 1; - return lldiv(fref, div); + return fref / div; } unsigned int mxc_get_clock(enum mxc_clock clk) |