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path: root/drivers/char/hw_random/st-rng.c
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2020-07-09hwrng: st - Fix W=1 unused variable warningHerbert Xu1-1/+2
This patch fixes an unused variable warning when this driver is built-in with CONFIG_OF=n. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2019-10-26hwrng: st - use devm_platform_ioremap_resource() to simplify codeYueHaibing1-3/+1
Use devm_platform_ioremap_resource() to simplify the code a bit. This is detected by coccinelle. Signed-off-by: YueHaibing <yuehaibing@huawei.com> Reviewed-by: Patrice Chotard <patrice.chotard@st.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2019-08-02hwrng: drivers - Use device-managed registration APIChuhong Yuan1-3/+1
Use devm_hwrng_register to simplify the implementation. Manual unregistration and some remove functions can be removed now. Signed-off-by: Chuhong Yuan <hslester96@gmail.com> Acked-by: Ɓukasz Stelmach <l.stelmach@samsung.com> Acked-by: Ludovic Desroches <ludovic.desroches@microchip.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2019-06-19treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500Thomas Gleixner1-4/+1
Based on 2 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation # extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 4122 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Enrico Weigelt <info@metux.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-09-13hwrng: st - Fix missing clk_disable_unprepare() on error in st_rng_probe()Wei Yongjun1-0/+1
Fix the missing clk_disable_unprepare() before return from st_rng_probe() in the error handling case. Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com> Acked-by: Patrice Chotard <patrice.chotard@st.com> Acked-by: Peter Griffin <peter.griffin@linaro.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2016-08-31hwrng: Remove check for max less than 4 bytesPrasannaKumar Muralidharan1-3/+0
HW RNG core never asks for data less than 4 bytes. The check whether max is less than 4 bytes is unnecessary. Remove the check. Signed-off-by: PrasannaKumar Muralidharan <prasannatsmkumar@gmail.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2015-10-08hwrng: st - Improve FIFO size/depth descriptionLee Jones1-1/+2
The original representation of FIFO size in the driver coupled with the ambiguity in the documentation meant that it was easy to confuse readers. This lead to a false positive BUG-find and subsequently time wastage debugging this phantom issue. Hopefully this patch can prevent future readers from falling into the same trap. Signed-off-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2015-10-08hwrng: st - Use real-world device timings for timeoutLee Jones1-2/+8
Samples are documented to be available every 0.667us, so in theory the 8 sample deep FIFO should take 5.336us to fill. However, during thorough testing, it became apparent that filling the FIFO actually takes closer to 12us. Also take into consideration that udelay() can behave oddly i.e. not delay for as long as requested. Suggested-by: Russell King <rmk+kernel@arm.linux.org.uk>: "IIRC, Linus recommends a x2 factor on delays, especially timeouts generated by these functions. Signed-off-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2015-09-21hwrng: st - Add support for ST's HW Random Number GeneratorLee Jones1-0/+144
Signed-off-by: Pankaj Dev <pankaj.dev@st.com> Signed-off-by: Lee Jones <lee.jones@linaro.org> Acked-by: Kieran Bingham <kieranbingham@gmail.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>