Remove the interrupt handler and the code for its installation and
cleanup.
We use readl_poll_timeout now for the selftest and the initial seed.
There are no more users of the interrupt.
Signed-off-by: Martin Kaiser <martin@xxxxxxxxx>
---
v2:
- separate commit for removing irq code
drivers/char/hw_random/imx-rngc.c | 55 -------------------------------
1 file changed, 55 deletions(-)
diff --git a/drivers/char/hw_random/imx-rngc.c b/drivers/char/hw_random/imx-rngc.c
index 3a3f0f923bed..7fe09c59ce19 100644
--- a/drivers/char/hw_random/imx-rngc.c
+++ b/drivers/char/hw_random/imx-rngc.c
@@ -63,12 +63,6 @@ struct imx_rngc {
struct clk *clk;
void __iomem *base;
struct hwrng rng;
- struct completion rng_op_done;
- /*
- * err_reg is written only by the irq handler and read only
- * when interrupts are masked, we need no spinlock
- */
- u32 err_reg;
};
@@ -91,15 +85,6 @@ static inline void imx_rngc_irq_mask_clear(struct imx_rngc *rngc)
writel(cmd, rngc->base + RNGC_COMMAND);
}
-static inline void imx_rngc_irq_unmask(struct imx_rngc *rngc)
-{
- u32 ctrl;
-
- ctrl = readl(rngc->base + RNGC_CONTROL);
- ctrl &= ~(RNGC_CTRL_MASK_DONE | RNGC_CTRL_MASK_ERROR);
- writel(ctrl, rngc->base + RNGC_CONTROL);
-}
-
static int imx_rngc_self_test(struct imx_rngc *rngc)
{
u32 cmd, status;
@@ -143,26 +128,6 @@ static int imx_rngc_read(struct hwrng *rng, void *data, size_t max, bool wait)
return retval ? retval : -EIO;
}
-static irqreturn_t imx_rngc_irq(int irq, void *priv)
-{
- struct imx_rngc *rngc = (struct imx_rngc *)priv;
- u32 status;
-
- /*
- * clearing the interrupt will also clear the error register
- * read error and status before clearing
- */
- status = readl(rngc->base + RNGC_STATUS);
- rngc->err_reg = readl(rngc->base + RNGC_ERROR);
-
- imx_rngc_irq_mask_clear(rngc);
-
- if (status & (RNGC_STATUS_SEED_DONE | RNGC_STATUS_ST_DONE))
- complete(&rngc->rng_op_done);
-
- return IRQ_HANDLED;
-}
-
static int imx_rngc_init(struct hwrng *rng)
{
struct imx_rngc *rngc = container_of(rng, struct imx_rngc, rng);
@@ -198,21 +163,9 @@ static int imx_rngc_init(struct hwrng *rng)
ctrl |= RNGC_CTRL_AUTO_SEED;
writel(ctrl, rngc->base + RNGC_CONTROL);
- /*
- * if initialisation was successful, we keep the interrupt
- * unmasked until imx_rngc_cleanup is called
- * we mask the interrupt ourselves if we return an error
- */
return 0;
}
-static void imx_rngc_cleanup(struct hwrng *rng)
-{
- struct imx_rngc *rngc = container_of(rng, struct imx_rngc, rng);
-
- imx_rngc_irq_mask_clear(rngc);
-}
-
static int __init imx_rngc_probe(struct platform_device *pdev)
{
struct imx_rngc *rngc;
@@ -246,12 +199,9 @@ static int __init imx_rngc_probe(struct platform_device *pdev)
if (rng_type != RNGC_TYPE_RNGC && rng_type != RNGC_TYPE_RNGB)
return -ENODEV;
- init_completion(&rngc->rng_op_done);
-
rngc->rng.name = pdev->name;
rngc->rng.init = imx_rngc_init;
rngc->rng.read = imx_rngc_read;
- rngc->rng.cleanup = imx_rngc_cleanup;
rngc->rng.quality = 19;
rngc->dev = &pdev->dev;
@@ -259,11 +209,6 @@ static int __init imx_rngc_probe(struct platform_device *pdev)
imx_rngc_irq_mask_clear(rngc);
- ret = devm_request_irq(&pdev->dev,
- irq, imx_rngc_irq, 0, pdev->name, (void *)rngc);
- if (ret)
- return dev_err_probe(&pdev->dev, ret, "Can't get interrupt working.\n");
-
if (self_test) {
ret = imx_rngc_self_test(rngc);
if (ret)
--
2.39.2
