On 31.03.2021 18:54, Alexandre Belloni wrote: > EXTERNAL EMAIL: Do not click links or open attachments unless you know the > content is safe > > On 31/03/2021 13:58:54+0300, Claudiu Beznea wrote: >> Add SFRBU registers definitions for SAMA7G5. >> >> Signed-off-by: Claudiu Beznea <claudiu.bez...@microchip.com> >> --- >> include/soc/at91/sama7-sfrbu.h | 34 ++++++++++++++++++++++++++++++++++ >> 1 file changed, 34 insertions(+) >> create mode 100644 include/soc/at91/sama7-sfrbu.h >> >> diff --git a/include/soc/at91/sama7-sfrbu.h b/include/soc/at91/sama7-sfrbu.h >> new file mode 100644 >> index 000000000000..76b740810d34 >> --- /dev/null >> +++ b/include/soc/at91/sama7-sfrbu.h >> @@ -0,0 +1,34 @@ >> +/* SPDX-License-Identifier: GPL-2.0-only */ >> +/* >> + * Microchip SAMA7 SFRBU registers offsets and bit definitions. >> + * >> + * Copyright (C) [2020] Microchip Technology Inc. and its subsidiaries >> + * >> + * Author: Claudu Beznea <claudiu.bez...@microchip.com> >> + */ >> + >> +#ifndef __SAMA7_SFRBU_H__ >> +#define __SAMA7_SFRBU_H__ >> + >> +#ifdef CONFIG_SOC_SAMA7 >> + >> +#define AT91_SFRBU_PSWBU (0x00) /* SFRBU Power >> Switch BU Control Register */ >> +#define AT91_SFRBU_PSWBU_PSWKEY (0x4BD20C << 8) /* >> Specific value mandatory to allow writing of other register bits */ >> +#define AT91_SFRBU_PSWBU_STATE (1 << 2) /* >> Power switch BU state */ >> +#define AT91_SFRBU_PSWBU_SOFTSWITCH (1 << 1) /* >> Power switch BU source selection */ >> +#define AT91_SFRBU_PSWBU_CTRL (1 << 0) /* >> Power switch BU control */ > > Please use BIT > >> + >> +#define AT91_SFRBU_25LDOCR (0x0C) /* SFRBU 2.5V >> LDO Control Register */ >> +#define AT91_SFRBU_25LDOCR_LDOANAKEY (0x3B6E18 << 8) /* >> Specific value mandatory to allow writing of other register bits. */ >> +#define AT91_SFRBU_25LDOCR_STATE (1 << 3) /* >> LDOANA Switch On/Off Control */ >> +#define AT91_SFRBU_25LDOCR_LP (1 << 2) /* >> LDOANA Low-Power Mode Control */ >> +#define AT91_SFRBU_PD_VALUE_MSK (0x3) > > GENMASK > >> +#define AT91_SFRBU_25LDOCR_PD_VALUE(v) ((v) & >> AT91_SFRBU_PD_VALUE_MSK) /* LDOANA Pull-down value */ > > this macro is not necessary, you can use FIELD_PREP with the previous > define. >
This file (as well as include/soc/at91/sama7-ddr.h) is used in arch/arm/mach-at91/pm_suspend.S who's content is executed from CPU internal SRAM. I chose to have these defines w/o BIT(), GENMASK() and friends to not depend on the bitops.h who's size might be changed at any time. > > -- > Alexandre Belloni, co-owner and COO, Bootlin > Embedded Linux and Kernel engineering > https://bootlin.com >
