diff options
Diffstat (limited to 'arch/mips/alchemy/common/clock.c')
| -rw-r--r-- | arch/mips/alchemy/common/clock.c | 19 |
1 files changed, 14 insertions, 5 deletions
diff --git a/arch/mips/alchemy/common/clock.c b/arch/mips/alchemy/common/clock.c index 48a9dfc55b51..ade73375ede6 100644 --- a/arch/mips/alchemy/common/clock.c +++ b/arch/mips/alchemy/common/clock.c @@ -315,17 +315,26 @@ static struct clk __init *alchemy_clk_setup_mem(const char *pn, int ct) /* lrclk: external synchronous static bus clock ***********************/ -static struct clk __init *alchemy_clk_setup_lrclk(const char *pn) +static struct clk __init *alchemy_clk_setup_lrclk(const char *pn, int t) { - /* MEM_STCFG0[15:13] = divisor. + /* Au1000, Au1500: MEM_STCFG0[11]: If bit is set, lrclk=pclk/5, + * otherwise lrclk=pclk/4. + * All other variants: MEM_STCFG0[15:13] = divisor. * L/RCLK = periph_clk / (divisor + 1) * On Au1000, Au1500, Au1100 it's called LCLK, * on later models it's called RCLK, but it's the same thing. */ struct clk *c; - unsigned long v = alchemy_rdsmem(AU1000_MEM_STCFG0) >> 13; + unsigned long v = alchemy_rdsmem(AU1000_MEM_STCFG0); - v = (v & 7) + 1; + switch (t) { + case ALCHEMY_CPU_AU1000: + case ALCHEMY_CPU_AU1500: + v = 4 + ((v >> 11) & 1); + break; + default: /* all other models */ + v = ((v >> 13) & 7) + 1; + } c = clk_register_fixed_factor(NULL, ALCHEMY_LR_CLK, pn, 0, 1, v); if (!IS_ERR(c)) @@ -1060,7 +1069,7 @@ static int __init alchemy_clk_init(void) ERRCK(c) /* L/RCLK: external static bus clock for synchronous mode */ - c = alchemy_clk_setup_lrclk(ALCHEMY_PERIPH_CLK); + c = alchemy_clk_setup_lrclk(ALCHEMY_PERIPH_CLK, ctype); ERRCK(c) /* Frequency dividers 0-5 */ |