kernel/linux.git - Linux kernel stable tree (mirror)

Age	Commit message (Collapse)	Author	Files	Lines
2024-05-08	PM / devfreq: sun8i-a33-mbus: Convert to platform remove callback returning void	Uwe Kleine-König	1	-4/+2
	The .remove() callback for a platform driver returns an int which makes many driver authors wrongly assume it's possible to do error handling by returning an error code. However the value returned is ignored (apart from emitting a warning) and this typically results in resource leaks. To improve here there is a quest to make the remove callback return void. In the first step of this quest all drivers are converted to .remove_new(), which already returns void. Eventually after all drivers are converted, .remove_new() will be renamed to .remove(). Trivially convert this driver from always returning zero in the remove callback to the void returning variant. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
2021-12-10	PM / devfreq: Add a driver for the sun8i/sun50i MBUS	Samuel Holland	1	-0/+511
	This driver works by adjusting the divider on the DRAM controller's module clock. Thus there is no fixed set of OPPs, only "full speed" down to "quarter speed" (or whatever the maximum divider is on that variant). It makes use of the MDFS hardware in the MBUS, in "DFS" mode, which takes care of updating registers during the critical section while DRAM is inaccessible. This driver should support several sunxi SoCs, starting with the A33, which have a DesignWare DDR3 controller with merged PHY register space and the matching MBUS register layout (so not A63 or later). However, the driver has only been tested on the A64/H5, so those are the only compatibles enabled for now. Acked-by: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: Samuel Holland <samuel@sholland.org> Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>