[PATCH 01/12] hwrng: bcm2835-rng: Obtain base register via resource
From: Florian Fainelli <hidden>
Date: 2017-11-02 01:04:24
Also in:
linux-arm-kernel, linux-crypto, lkml
Subsystem:
hardware random number generator core, the rest · Maintainers:
Olivia Mackall, Herbert Xu, Linus Torvalds
In preparation for consolidating bcm63xx-rng into bcm2835-rng, make sure that we obtain the base register via platform_get_resource() since we need to support the non-DT enabled MIPS-based BCM63xx DSL SoCs. Signed-off-by: Florian Fainelli <redacted> --- drivers/char/hw_random/bcm2835-rng.c | 20 ++++++++++---------- 1 file changed, 10 insertions(+), 10 deletions(-)
diff --git a/drivers/char/hw_random/bcm2835-rng.c b/drivers/char/hw_random/bcm2835-rng.c
index 574211a49549..a818418a7e4c 100644
--- a/drivers/char/hw_random/bcm2835-rng.c
+++ b/drivers/char/hw_random/bcm2835-rng.c@@ -81,21 +81,23 @@ static int bcm2835_rng_probe(struct platform_device *pdev) void (*rng_setup)(void __iomem *base); const struct of_device_id *rng_id; void __iomem *rng_base; + struct resource *r; int err; + r = platform_get_resource(pdev, IORESOURCE_MEM, 0); + /* map peripheral */ - rng_base = of_iomap(np, 0); - if (!rng_base) { + rng_base = devm_ioremap_resource(dev, r); + if (IS_ERR(rng_base)) { dev_err(dev, "failed to remap rng regs"); - return -ENODEV; + return PTR_ERR(rng_base); } bcm2835_rng_ops.priv = (unsigned long)rng_base; rng_id = of_match_node(bcm2835_rng_of_match, np); - if (!rng_id) { - iounmap(rng_base); + if (!rng_id) return -EINVAL; - } + /* Check for rng init function, execute it */ rng_setup = rng_id->data; if (rng_setup)
@@ -107,10 +109,9 @@ static int bcm2835_rng_probe(struct platform_device *pdev) /* register driver */ err = hwrng_register(&bcm2835_rng_ops); - if (err) { + if (err) dev_err(dev, "hwrng registration failed\n"); - iounmap(rng_base); - } else + else dev_info(dev, "hwrng registered\n"); return err;
@@ -125,7 +126,6 @@ static int bcm2835_rng_remove(struct platform_device *pdev) /* unregister driver */ hwrng_unregister(&bcm2835_rng_ops); - iounmap(rng_base); return 0; }
--
2.9.3
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