mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-25 21:54:06 +08:00
889c2b7ec4
Initially, the meson clock directory only hosted 2 controllers drivers, for meson8 and gxbb. At the time, both used the same set of clock drivers so managing the dependencies was not a big concern. Since this ancient time, entropy did its job, controllers with different requirement and specific clock drivers have been added. Unfortunately, we did not do a great job at managing the dependencies between the controllers and the different clock drivers. Some drivers, such as clk-phase or vid-pll-div, are compiled even if they are useless on the target (meson8). As we are adding new controllers, we need to be able to pick a driver w/o pulling the whole thing. The patch aims to clean things up by: * providing a dedicated CONFIG_ for each clock drivers * allowing clock drivers to be compiled as a modules, if possible * stating explicitly which drivers are required by each controller. Signed-off-by: Jerome Brunet <jbrunet@baylibre.com> Signed-off-by: Neil Armstrong <narmstrong@baylibre.com> Link: https://lkml.kernel.org/r/20190201125841.26785-5-jbrunet@baylibre.com
47 lines
1.1 KiB
C
47 lines
1.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* Copyright (c) 2015 Endless Mobile, Inc.
|
|
* Author: Carlo Caione <carlo@endlessm.com>
|
|
*/
|
|
|
|
#ifndef __MESON_PARM_H
|
|
#define __MESON_PARM_H
|
|
|
|
#include <linux/bits.h>
|
|
#include <linux/regmap.h>
|
|
|
|
#define PMASK(width) GENMASK(width - 1, 0)
|
|
#define SETPMASK(width, shift) GENMASK(shift + width - 1, shift)
|
|
#define CLRPMASK(width, shift) (~SETPMASK(width, shift))
|
|
|
|
#define PARM_GET(width, shift, reg) \
|
|
(((reg) & SETPMASK(width, shift)) >> (shift))
|
|
#define PARM_SET(width, shift, reg, val) \
|
|
(((reg) & CLRPMASK(width, shift)) | ((val) << (shift)))
|
|
|
|
#define MESON_PARM_APPLICABLE(p) (!!((p)->width))
|
|
|
|
struct parm {
|
|
u16 reg_off;
|
|
u8 shift;
|
|
u8 width;
|
|
};
|
|
|
|
static inline unsigned int meson_parm_read(struct regmap *map, struct parm *p)
|
|
{
|
|
unsigned int val;
|
|
|
|
regmap_read(map, p->reg_off, &val);
|
|
return PARM_GET(p->width, p->shift, val);
|
|
}
|
|
|
|
static inline void meson_parm_write(struct regmap *map, struct parm *p,
|
|
unsigned int val)
|
|
{
|
|
regmap_update_bits(map, p->reg_off, SETPMASK(p->width, p->shift),
|
|
val << p->shift);
|
|
}
|
|
|
|
#endif /* __MESON_PARM_H */
|
|
|