hwrng: xgene - Simplify using devm_clk_get_optional_enabled()

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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 <u.kleine-koenig@pengutronix.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

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Uwe Kleine-König 2023-02-14 17:28:28 +01:00 • committed by Herbert Xu

parent 11f92a1308

commit 67fb1e2958

1 changed files with 6 additions and 21 deletions

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drivers/char/hw_random/xgene-rng.c

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