diff options
| author | Anson Huang <b20788@freescale.com> | 2012-10-15 19:01:17 -0400 |
|---|---|---|
| committer | Anson Huang <b20788@freescale.com> | 2012-10-16 10:14:00 -0400 |
| commit | e29ecfd09fc4d808b5dd0dc5a2d1b2d27a6063b9 (patch) | |
| tree | 1d0a5f969498fc248aaf1b9d20e3b4dbacaebf22 | |
| parent | f3e0a1c705ec207004c21afe7a166c2eea5f4c6a (diff) | |
ENGR00229630 vpu: need to manage pu regulator in suspend/resume
If VPU is working before suspend, we need to disable its regulator
to make sure regulator can be off before suspend, then enable
its regulator before resume to work, we check vpu's open_count
to determine whether to disable/enable its regulator.
Signed-off-by: Anson Huang <b20788@freescale.com>
| -rw-r--r-- | drivers/mxc/vpu/mxc_vpu.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/mxc/vpu/mxc_vpu.c b/drivers/mxc/vpu/mxc_vpu.c index 8178824ab80a..6d77afb8a3d6 100644 --- a/drivers/mxc/vpu/mxc_vpu.c +++ b/drivers/mxc/vpu/mxc_vpu.c @@ -812,6 +812,13 @@ static int vpu_suspend(struct platform_device *pdev, pm_message_t state) if (vpu_plat->pg) vpu_plat->pg(1); + /* If VPU is working before suspend, disable + * regulator to make usecount right. */ + if (open_count > 0) { + if (!IS_ERR(vpu_regulator)) + regulator_disable(vpu_regulator); + } + if (!IS_ERR(vpu_regulator)) regulator_disable(vpu_regulator); return 0; @@ -836,6 +843,13 @@ static int vpu_resume(struct platform_device *pdev) if (vpu_plat->pg) vpu_plat->pg(0); + /* If VPU is working before suspend, enable + * regulator to make usecount right. */ + if (open_count > 0) { + if (!IS_ERR(vpu_regulator)) + regulator_enable(vpu_regulator); + } + if (bitwork_mem.cpu_addr != 0) { u32 *p = (u32 *) bitwork_mem.cpu_addr; u32 data, pc; |