ARM: OMAP2+: gpmc: Sanity check GPMC fck on probe
This prevents potential division by zero errors
if GPMC fck turns out to be zero due to faulty clock
data.
Use resource managed clk_get() API.
Signed-off-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
diff --git a/arch/arm/mach-omap2/gpmc.c b/arch/arm/mach-omap2/gpmc.c
index 437fb6f..104bc2c 100644
--- a/arch/arm/mach-omap2/gpmc.c
+++ b/arch/arm/mach-omap2/gpmc.c
@@ -204,11 +204,6 @@
{
unsigned long rate = clk_get_rate(gpmc_l3_clk);
- if (rate == 0) {
- printk(KERN_WARNING "gpmc_l3_clk not enabled\n");
- return 0;
- }
-
rate /= 1000;
rate = 1000000000 / rate; /* In picoseconds */
@@ -1692,13 +1687,18 @@
else
gpmc_irq = res->start;
- gpmc_l3_clk = clk_get(&pdev->dev, "fck");
+ gpmc_l3_clk = devm_clk_get(&pdev->dev, "fck");
if (IS_ERR(gpmc_l3_clk)) {
- dev_err(&pdev->dev, "error: clk_get\n");
+ dev_err(&pdev->dev, "Failed to get GPMC fck\n");
gpmc_irq = 0;
return PTR_ERR(gpmc_l3_clk);
}
+ if (!clk_get_rate(gpmc_l3_clk)) {
+ dev_err(&pdev->dev, "Invalid GPMC fck clock rate\n");
+ return -EINVAL;
+ }
+
pm_runtime_enable(&pdev->dev);
pm_runtime_get_sync(&pdev->dev);
@@ -1741,7 +1741,6 @@
rc = gpmc_probe_dt(pdev);
if (rc < 0) {
pm_runtime_put_sync(&pdev->dev);
- clk_put(gpmc_l3_clk);
dev_err(gpmc_dev, "failed to probe DT parameters\n");
return rc;
}