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gpu: host1x: mipi: Use readl_relaxed_poll_timeout() in tegra_mipi_wait()

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Use readl_relaxed_poll_timeout() in tegra_mipi_wait() to simplify
the code.

Signed-off-by: Sowjanya Komatineni <skomatineni@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
This commit is contained in:
Sowjanya Komatineni 2020-07-14 21:20:52 -07:00 committed by Thierry Reding
parent 767598d447
commit 7d1409826d
1 changed files with 8 additions and 12 deletions
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20
drivers/gpu/host1x/mipi.c
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@ -21,9 +21,9 @@
*/
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/host1x.h>
#include <linux/io.h>
#include <linux/iopoll.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
@ -295,19 +295,15 @@ EXPORT_SYMBOL(tegra_mipi_disable);
static int tegra_mipi_wait(struct tegra_mipi *mipi)
{
unsigned long timeout = jiffies + msecs_to_jiffies(250);
void __iomem *status_reg = mipi->regs + (MIPI_CAL_STATUS << 2);
u32 value;
int err;
while (time_before(jiffies, timeout)) {
value = tegra_mipi_readl(mipi, MIPI_CAL_STATUS);
if ((value & MIPI_CAL_STATUS_ACTIVE) == 0 &&
(value & MIPI_CAL_STATUS_DONE) != 0)
return 0;
usleep_range(10, 50);
}
return -ETIMEDOUT;
err = readl_relaxed_poll_timeout(status_reg, value,
!(value & MIPI_CAL_STATUS_ACTIVE) &&
(value & MIPI_CAL_STATUS_DONE), 50,
250000);
return err;
}
int tegra_mipi_calibrate(struct tegra_mipi_device *device)