diff options
author | Ingo Molnar <mingo@kernel.org> | 2014-02-02 09:43:20 +0100 |
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committer | Ingo Molnar <mingo@kernel.org> | 2014-02-02 09:43:20 +0100 |
commit | 65370bdf881e20907e7a53abab9b8c0bc5f60a6b (patch) | |
tree | 0d32a494e873b7b92dbfab0e67ffeef597ee8108 /arch/arm/mach-imx/clk-pllv1.c | |
parent | e207552e64ea053a33e856828ad7915484911d06 (diff) | |
parent | 5cb480f6b488128140c940abff3c36f524a334a8 (diff) |
Merge branch 'linus' into core/locking
Refresh the topic.
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/arm/mach-imx/clk-pllv1.c')
-rw-r--r-- | arch/arm/mach-imx/clk-pllv1.c | 23 |
1 files changed, 19 insertions, 4 deletions
diff --git a/arch/arm/mach-imx/clk-pllv1.c b/arch/arm/mach-imx/clk-pllv1.c index c1eaee346954..d21d14ca46c1 100644 --- a/arch/arm/mach-imx/clk-pllv1.c +++ b/arch/arm/mach-imx/clk-pllv1.c @@ -18,6 +18,11 @@ * * PLL clock version 1, found on i.MX1/21/25/27/31/35 */ + +#define MFN_BITS (10) +#define MFN_SIGN (BIT(MFN_BITS - 1)) +#define MFN_MASK (MFN_SIGN - 1) + struct clk_pllv1 { struct clk_hw hw; void __iomem *base; @@ -25,6 +30,11 @@ struct clk_pllv1 { #define to_clk_pllv1(clk) (container_of(clk, struct clk_pllv1, clk)) +static inline bool mfn_is_negative(unsigned int mfn) +{ + return !cpu_is_mx1() && !cpu_is_mx21() && (mfn & MFN_SIGN); +} + static unsigned long clk_pllv1_recalc_rate(struct clk_hw *hw, unsigned long parent_rate) { @@ -58,10 +68,15 @@ static unsigned long clk_pllv1_recalc_rate(struct clk_hw *hw, /* * On all i.MXs except i.MX1 and i.MX21 mfn is a 10bit - * 2's complements number + * 2's complements number. + * On i.MX27 the bit 9 is the sign bit. */ - if (!cpu_is_mx1() && !cpu_is_mx21() && mfn >= 0x200) - mfn_abs = 0x400 - mfn; + if (mfn_is_negative(mfn)) { + if (cpu_is_mx27()) + mfn_abs = mfn & MFN_MASK; + else + mfn_abs = BIT(MFN_BITS) - mfn; + } rate = parent_rate * 2; rate /= pd + 1; @@ -70,7 +85,7 @@ static unsigned long clk_pllv1_recalc_rate(struct clk_hw *hw, do_div(ll, mfd + 1); - if (!cpu_is_mx1() && !cpu_is_mx21() && mfn >= 0x200) + if (mfn_is_negative(mfn)) ll = -ll; ll = (rate * mfi) + ll; |