[PATCH] ARM: imx: add cpuidle support for i.mx6sl

[John Tobias]

Hi Anson,

My kernel for iMX6SL has a imx6q-cpufreq and I used your patch.
Unfortunately, the kernel crashes if the imx6sl_set_wait_clk being
called in imx6sl_enter_wait.

[  288.166905] [<80044b80>] (dequeue_task+0x0/0xc8) from [<80045650>]
(deactivate_task+0x30/0x34)
[  288.176403] [<80045620>] (deactivate_task+0x0/0x34) from
[<8050ac88>] (__schedule+0x318/0x58c)
[  288.185848] [<8050a970>] (__schedule+0x0/0x58c) from [<8050af34>]
(schedule+0x38/0x88)
[  288.194758] [<8050aefc>] (schedule+0x0/0x88) from [<8050b1c8>]
(schedule_preempt_disabled+0x10/0x14)
[  288.204858] [<8050b1b8>] (schedule_preempt_disabled+0x0/0x14) from
[<8050bcd4>] (mutex_lock_nested+0x16c/0x334)
[  288.215850] [<8050bb68>] (mutex_lock_nested+0x0/0x334) from
[<8034763c>] (clk_prepare_lock+0x90/0x104)
[  288.226041] [<803475ac>] (clk_prepare_lock+0x0/0x104) from
[<80349254>] (clk_set_rate+0x1c/0xbc)
[  288.235535]  r6:806fd360 r5:00000000 r4:bf817f80 r3:80713d80
[  288.242679] [<80349238>] (clk_set_rate+0x0/0xbc) from [<8001e574>]
(imx6sl_set_wait_clk+0x28/0x70)
[  288.252354]  r5:00000043 r4:00000001
[  288.256585] [<8001e54c>] (imx6sl_set_wait_clk+0x0/0x70) from
[<8001def4>] (imx6sl_enter_wait+0x24/0x2c)
[  288.266684]  r5:00000043 r4:00000001
[  288.270949] [<8001ded0>] (imx6sl_enter_wait+0x0/0x2c) from
[<80317608>] (cpuidle_enter_state+0x44/0xfc)
[  288.281051]  r4:13bf2645 r3:8001ded0
[  288.285682] [<803175c4>] (cpuidle_enter_state+0x0/0xfc) from
[<803177bc>] (cpuidle_idle_call+0xfc/0x150)
[  288.295871]  r8:806e00d8 r7:00000001 r6:00000000 r5:80c58034 r4:806fd360
[  288.304428] [<803176c0>] (cpuidle_idle_call+0x0/0x150) from
[<8000fa68>] (arch_cpu_idle+0x10/0x44)
[  288.314108]  r9:8070970a r8:8070970a r7:806d2000 r6:806da0dc r5:806d2000
r4:806d2000
[  288.323611] [<8000fa58>] (arch_cpu_idle+0x0/0x44) from [<800590f4>]
(cpu_startup_entry+0xe0/0x120)
[  288.333460] [<80059014>] (cpu_startup_entry+0x0/0x120) from
[<80503c8c>] (rest_init+0xcc/0xdc)
[  288.342810]  r7:ffffffff r3:00000000
[  288.347115] [<80503bc0>] (rest_init+0x0/0xdc) from [<806a2b00>]
(start_kernel+0x348/0x354)
[  288.356099]  r6:806da040 r5:806da040 r4:806da150
[  288.361972] [<806a27b8>] (start_kernel+0x0/0x354) from [<80008070>]
(0x80008070)


Regards,

john