From 89a3dfb787072438f72de95ff3fe7b58213e08c1 Mon Sep 17 00:00:00 2001 From: Maxime Ripard Date: Wed, 29 Jun 2016 21:05:24 +0200 Subject: clk: sunxi-ng: Add fractional lib Some clocks can be switched to a mode called fractional that have two fixed output rate you can choose from. Add a small library to deal with those clocks. Signed-off-by: Maxime Ripard Signed-off-by: Michael Turquette Link: lkml.kernel.org/r/20160629190535.11855-4-maxime.ripard@free-electrons.com --- drivers/clk/sunxi-ng/ccu_frac.h | 53 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 53 insertions(+) create mode 100644 drivers/clk/sunxi-ng/ccu_frac.h (limited to 'drivers/clk/sunxi-ng/ccu_frac.h') diff --git a/drivers/clk/sunxi-ng/ccu_frac.h b/drivers/clk/sunxi-ng/ccu_frac.h new file mode 100644 index 000000000000..e4c670b1cdfe --- /dev/null +++ b/drivers/clk/sunxi-ng/ccu_frac.h @@ -0,0 +1,53 @@ +/* + * Copyright (c) 2016 Maxime Ripard. All rights reserved. + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#ifndef _CCU_FRAC_H_ +#define _CCU_FRAC_H_ + +#include + +#include "ccu_common.h" + +struct _ccu_frac { + u32 enable; + u32 select; + + unsigned long rates[2]; +}; + +#define _SUNXI_CCU_FRAC(_enable, _select, _rate1, _rate2) \ + { \ + .enable = _enable, \ + .select = _select, \ + .rates = { _rate1, _rate2 }, \ + } + +bool ccu_frac_helper_is_enabled(struct ccu_common *common, + struct _ccu_frac *cf); +void ccu_frac_helper_enable(struct ccu_common *common, + struct _ccu_frac *cf); +void ccu_frac_helper_disable(struct ccu_common *common, + struct _ccu_frac *cf); + +bool ccu_frac_helper_has_rate(struct ccu_common *common, + struct _ccu_frac *cf, + unsigned long rate); + +unsigned long ccu_frac_helper_read_rate(struct ccu_common *common, + struct _ccu_frac *cf); + +int ccu_frac_helper_set_rate(struct ccu_common *common, + struct _ccu_frac *cf, + unsigned long rate); + +#endif /* _CCU_FRAC_H_ */ -- cgit v1.2.3