linux-stable.git/drivers/char/hw_random, branch v6.4

hwrng: xgene - remove unnecessary (void*) conversions

2023-03-24T10:22:28+00:00

Pointer variables of void * type do not require type cast.

Signed-off-by: Yu Zhe 
Signed-off-by: Herbert Xu

hwrng: meson - remove not needed call to platform_set_drvdata

2023-03-14T09:06:42+00:00

drvdata isn't used, therefore remove this call.

Signed-off-by: Heiner Kallweit 
Reviewed-by: Martin Blumenstingl 
Signed-off-by: Herbert Xu

hwrng: meson - use devm_clk_get_optional_enabled

2023-03-14T09:06:42+00:00

Use devm_clk_get_optional_enabled() to simplify the code.

Signed-off-by: Heiner Kallweit 
Reviewed-by: Martin Blumenstingl 
Signed-off-by: Herbert Xu

hwrng: meson - remove unused member of struct meson_rng_data

2023-03-14T09:06:42+00:00

Member pdev isn't used, remove it.

Signed-off-by: Heiner Kallweit 
Reviewed-by: Martin Blumenstingl 
Signed-off-by: Herbert Xu

hwrng: xgene - Improve error reporting for problems during .remove()

2023-03-14T09:06:41+00:00

Returning an error value in a platform driver's remove callback results in
a generic error message being emitted by the driver core, but otherwise it
doesn't make a difference. The device goes away anyhow.

As the driver already emits a better error message than the core, suppress
the generic error message by returning zero unconditionally.

Signed-off-by: Uwe Kleine-König 
Signed-off-by: Herbert Xu

hwrng: xgene - Simplify using devm_clk_get_optional_enabled()

2023-03-10T11:10:10+00:00

Instead of ignoring errors returned by devm_clk_get() and manually
enabling the clk for the whole lifetime of the bound device, use
devm_clk_get_optional_enabled(). This is simpler and also more correct
as it doesn't ignore errors. This is also more correct because now the
call to clk_disable_unprepare() can be dropped from xgene_rng_remove()
which happened while the hwrn device was still registered. With the devm
callback disabling the clk happens correctly only after
devm_hwrng_register() is undone.

As a result struct xgene_rng_dev::clk is only used in xgene_rng_probe, and
so the struct member can be replaced by a local variable.

Signed-off-by: Uwe Kleine-König 
Signed-off-by: Herbert Xu

hwrng: xgene - Simplify using dev_err_probe()

2023-03-10T11:10:09+00:00

dev_err_probe simplifies the idiom:

	if (ret != -EPROBE_DEFER)
		dev_err(...)
	return ret;

, emits the error code in a human readable way and even yields a useful
entry in /sys/kernel/debug/devices_deferred in the EPROBE_DEFER case.

So simplify and at the same time improve the driver by using
dev_err_probe().

Signed-off-by: Uwe Kleine-König 
Signed-off-by: Herbert Xu

hwrng: starfive - Enable compile testing

2023-02-03T04:55:59+00:00

Enable compile testing for jh7110.  Also remove the dependency on
HW_RANDOM.

Signed-off-by: Herbert Xu 
Reviewed-by: Conor Dooley 
Reviewed-by: Jia Jie Ho 
Signed-off-by: Herbert Xu

hwrng: starfive - Add TRNG driver for StarFive SoC

2023-01-27T10:58:09+00:00

This adds driver support for the hardware random number generator in
Starfive SoCs and adds StarFive TRNG entry to MAINTAINERS.

Co-developed-by: Jenny Zhang 
Signed-off-by: Jenny Zhang 
Signed-off-by: Jia Jie Ho 
Signed-off-by: Herbert Xu

random: do not include from random.h

2022-12-20T02:13:45+00:00

The  header is a random.c private detail, not
something to be called by other code. As such, don't make it
automatically available by way of random.h.

Cc: Michael Ellerman 
Acked-by: Heiko Carstens 
Reviewed-by: Christophe Leroy 
Signed-off-by: Jason A. Donenfeld