diff options
| author | Lily Zhang <r58066@freescale.com> | 2011-01-19 20:17:48 +0800 |
|---|---|---|
| committer | Alan Tull <alan.tull@freescale.com> | 2011-02-03 16:44:43 -0600 |
| commit | d6ec69b17ce7f741c6af72d38014ccd4d0b83c5c (patch) | |
| tree | 690903019fb4d5c242ce4d6f4d0a64258cdc5e26 | |
| parent | 3fd216d3f40bd91ee99d74674e045fd2a1cd6cc0 (diff) | |
ENGR00138211 mx5: don't allow to enter low bus if only have 1 WP
Current set_low_bus_freq codes enter low bus frequency automatically
if the CPU frequency is the lowest one. If only have one working
point, it enters low bus state in boot up phase. It causes mx53 RevA
board hang up in boot phase. And it also causes the bus frequency of
mx53 ard is reduced.
This patch doesn't allow to enter low bus state if only have 1 WP
Signed-off-by: Lily Zhang <r58066@freescale.com>
| -rw-r--r-- | arch/arm/mach-mx5/bus_freq.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/arch/arm/mach-mx5/bus_freq.c b/arch/arm/mach-mx5/bus_freq.c index 0358c867e106..a41bcfcb4a98 100644 --- a/arch/arm/mach-mx5/bus_freq.c +++ b/arch/arm/mach-mx5/bus_freq.c @@ -167,9 +167,11 @@ int set_low_bus_freq(void) return 0; if (bus_freq_scaling_initialized) { - /* can not enter low bus freq, when cpu is in highest freq */ - if (clk_get_rate(cpu_clk) > - cpu_wp_tbl[cpu_wp_nr - 1].cpu_rate) { + /* can not enter low bus freq, when cpu is in higher freq + * or only have one working point */ + if ((clk_get_rate(cpu_clk) > + cpu_wp_tbl[cpu_wp_nr - 1].cpu_rate) + || (cpu_wp_nr == 1)) { return 0; } |