diff options
| author | Neil Armstrong <narmstrong@baylibre.com> | 2020-09-25 09:19:20 +0200 |
|---|---|---|
| committer | Neil Armstrong <narmstrong@baylibre.com> | 2020-09-28 09:38:11 +0200 |
| commit | 02d249f99ecb7e398067d91760287c61d35fd34b (patch) | |
| tree | 2774d1d0f913443f4826bf24536e8ed9267abc65 /drivers | |
| parent | 1da91d9bcd6e5ef046c1df0d373d0df87b1e8a72 (diff) | |
rng: meson: make core clock optional
This fixes HWRNG support on Amlogic GXL, GXM, G12A, G12B & SM1
based boards dues to the lack of the core clock in the device tree.
It was reported breaking EFI boot in the Linux EFI stub, because the
EFI_RNG_PROTOCOL didn't check for the RNG device presence before
installing itself.
The Linux amlogic,meson-rng.yaml doesn't mandate the core clock,
this the clock should be ignores if not present.
Nevertheless, the clock should be present and this should be fixed
on the Linux meson-gxl.dtsi & meson-g12-common.dtsi then synced
with U-Boot.
The change has been tested on a Khadas VIM3, which uses the common
meson-g12-common.dtsi like the Odroid-C4 & Odroid-N2 in Scott's
report, along with the RNG cmd.
Cc: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reported-by: Scott K Logan <logans@cottsay.net>
Fixes: bc40eb278b ("drivers/rng: add Amlogic hardware RNG driver")
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Tested-by: Scott K Logan <logans@cottsay.net>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/rng/meson-rng.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/rng/meson-rng.c b/drivers/rng/meson-rng.c index 4b81a62353..57a5a702a2 100644 --- a/drivers/rng/meson-rng.c +++ b/drivers/rng/meson-rng.c @@ -90,8 +90,9 @@ static int meson_rng_ofdata_to_platdata(struct udevice *dev) if (!pdata->base) return -ENODEV; + /* Get optional "core" clock */ err = clk_get_by_name(dev, "core", &pdata->clk); - if (err) + if (err && err != -ENODATA) return err; return 0; |