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media: rc: nuvoton: Keep track of users on CIR enable/disable 

Core rc keeps track of the users - let's use it to tweak the code and
use the common code path on suspend/resume.

Signed-off-by: Michał Winiarski <michal.winiarski@intel.com>
Cc: Jarod Wilson <jarod@redhat.com>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
This commit is contained in:
Michał Winiarski 2018-05-21 10:38:02 -04:00 committed by Mauro Carvalho Chehab
parent 70c30b1ea7
commit adbe6cfe59
1 changed files with 36 additions and 46 deletions
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82
drivers/media/rc/nuvoton-cir.c
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@ -543,27 +543,9 @@ static void nvt_cir_regs_init(struct nvt_dev *nvt)
nvt_cir_reg_write(nvt, CIR_FIFOCON_TX_TRIGGER_LEV |
CIR_FIFOCON_RX_TRIGGER_LEV, CIR_FIFOCON);
/*
* Enable TX and RX, specify carrier on = low, off = high, and set
* sample period (currently 50us)
*/
nvt_cir_reg_write(nvt,
CIR_IRCON_TXEN | CIR_IRCON_RXEN |
CIR_IRCON_RXINV | CIR_IRCON_SAMPLE_PERIOD_SEL,
CIR_IRCON);
/* clear hardware rx and tx fifos */
nvt_clear_cir_fifo(nvt);
nvt_clear_tx_fifo(nvt);
/* clear any and all stray interrupts */
nvt_cir_reg_write(nvt, 0xff, CIR_IRSTS);
/* and finally, enable interrupts */
nvt_set_cir_iren(nvt);
/* enable the CIR logical device */
nvt_enable_logical_dev(nvt, LOGICAL_DEV_CIR);
}
static void nvt_cir_wake_regs_init(struct nvt_dev *nvt)
@ -892,6 +874,32 @@ static irqreturn_t nvt_cir_isr(int irq, void *data)
return IRQ_HANDLED;
}
static void nvt_enable_cir(struct nvt_dev *nvt)
{
unsigned long flags;
/* enable the CIR logical device */
nvt_enable_logical_dev(nvt, LOGICAL_DEV_CIR);
spin_lock_irqsave(&nvt->lock, flags);
/*
* Enable TX and RX, specify carrier on = low, off = high, and set
* sample period (currently 50us)
*/
nvt_cir_reg_write(nvt, CIR_IRCON_TXEN | CIR_IRCON_RXEN |
CIR_IRCON_RXINV | CIR_IRCON_SAMPLE_PERIOD_SEL,
CIR_IRCON);
/* clear all pending interrupts */
nvt_cir_reg_write(nvt, 0xff, CIR_IRSTS);
/* enable interrupts */
nvt_set_cir_iren(nvt);
spin_unlock_irqrestore(&nvt->lock, flags);
}
static void nvt_disable_cir(struct nvt_dev *nvt)
{
unsigned long flags;
@ -920,25 +928,8 @@ static void nvt_disable_cir(struct nvt_dev *nvt)
static int nvt_open(struct rc_dev *dev)
{
struct nvt_dev *nvt = dev->priv;
unsigned long flags;
/* enable the CIR logical device */
nvt_enable_logical_dev(nvt, LOGICAL_DEV_CIR);
spin_lock_irqsave(&nvt->lock, flags);
/* set function enable flags */
nvt_cir_reg_write(nvt, CIR_IRCON_TXEN | CIR_IRCON_RXEN |
CIR_IRCON_RXINV | CIR_IRCON_SAMPLE_PERIOD_SEL,
CIR_IRCON);
/* clear all pending interrupts */
nvt_cir_reg_write(nvt, 0xff, CIR_IRSTS);
/* enable interrupts */
nvt_set_cir_iren(nvt);
spin_unlock_irqrestore(&nvt->lock, flags);
nvt_enable_cir(nvt);
return 0;
}
@ -1093,19 +1084,13 @@ static void nvt_remove(struct pnp_dev *pdev)
static int nvt_suspend(struct pnp_dev *pdev, pm_message_t state)
{
struct nvt_dev *nvt = pnp_get_drvdata(pdev);
unsigned long flags;
nvt_dbg("%s called", __func__);
spin_lock_irqsave(&nvt->lock, flags);
/* disable all CIR interrupts */
nvt_cir_reg_write(nvt, 0, CIR_IREN);
spin_unlock_irqrestore(&nvt->lock, flags);
/* disable cir logical dev */
nvt_disable_logical_dev(nvt, LOGICAL_DEV_CIR);
mutex_lock(&nvt->rdev->lock);
if (nvt->rdev->users)
nvt_disable_cir(nvt);
mutex_unlock(&nvt->rdev->lock);
/* make sure wake is enabled */
nvt_enable_wake(nvt);
@ -1122,6 +1107,11 @@ static int nvt_resume(struct pnp_dev *pdev)
nvt_cir_regs_init(nvt);
nvt_cir_wake_regs_init(nvt);
mutex_lock(&nvt->rdev->lock);
if (nvt->rdev->users)
nvt_enable_cir(nvt);
mutex_unlock(&nvt->rdev->lock);
return 0;
}