diff options
| author | Hongzhang Yang <Hongzhang.Yang@freescale.com> | 2012-07-13 18:20:01 +0800 |
|---|---|---|
| committer | Terry Lv <r65388@freescale.com> | 2012-07-25 13:10:52 +0800 |
| commit | 2e9380264a9f56c949a31c7ae3c8cc6c83fb4555 (patch) | |
| tree | bd70a89cbd5f4e7c59c3f5a28b06292061a34007 /drivers/mxc | |
| parent | 06df73e1d0dff1abf9f41647f8c06849be7209b4 (diff) | |
ENGR00217123 VPU kernel driver: enable/disable PU LDO
VPU driver will enable/disable PU LDO by calling regulator API
Enable PU LDO in vpu_open
Disable PU LDO in vpu_release
Signed-off-by: Hongzhang Yang <Hongzhang.Yang@freescale.com>
Diffstat (limited to 'drivers/mxc')
| -rw-r--r-- | drivers/mxc/vpu/mxc_vpu.c | 24 |
1 files changed, 23 insertions, 1 deletions
diff --git a/drivers/mxc/vpu/mxc_vpu.c b/drivers/mxc/vpu/mxc_vpu.c index c3235dfb361e..03a35be0b179 100644 --- a/drivers/mxc/vpu/mxc_vpu.c +++ b/drivers/mxc/vpu/mxc_vpu.c @@ -39,6 +39,7 @@ #include <linux/workqueue.h> #include <linux/sched.h> #include <linux/vmalloc.h> +#include <linux/regulator/consumer.h> #include <asm/sizes.h> #include <mach/clock.h> #include <mach/hardware.h> @@ -224,8 +225,19 @@ static irqreturn_t vpu_jpu_irq_handler(int irq, void *dev_id) */ static int vpu_open(struct inode *inode, struct file *filp) { + struct regulator *vpu_regulator; + mutex_lock(&vpu_data.lock); - open_count++; + + if (open_count++ == 0) { + vpu_regulator = regulator_get(NULL, "cpu_vddvpu"); + if (IS_ERR(vpu_regulator)) + printk(KERN_ERR + "%s: failed to get vpu regulator\n", __func__); + else + regulator_enable(vpu_regulator); + } + filp->private_data = (void *)(&vpu_data); mutex_unlock(&vpu_data.lock); return 0; @@ -481,8 +493,18 @@ static long vpu_ioctl(struct file *filp, u_int cmd, */ static int vpu_release(struct inode *inode, struct file *filp) { + struct regulator *vpu_regulator; + mutex_lock(&vpu_data.lock); if (open_count > 0 && !(--open_count)) { + + vpu_regulator = regulator_get(NULL, "cpu_vddvpu"); + if (IS_ERR(vpu_regulator)) + printk(KERN_ERR + "%s: failed to get vpu regulator\n", __func__); + else + regulator_disable(vpu_regulator); + vpu_free_buffers(); /* Free shared memory when vpu device is idle */ |