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    Subject[PATCH v8 02/38] ARM: ep93xx: add regmap aux_dev
    From: Nikita Shubin <nikita.shubin@maquefel.me>

    The following driver's should be instantiated by ep93xx syscon driver:

    - reboot
    - pinctrl
    - clock

    They all require access to DEVCFG register with a shared lock held, to
    avoid conflict writing to swlocked parts of DEVCFG.

    Provide common resources such as base, regmap and spinlock via auxiliary
    bus framework.

    Signed-off-by: Nikita Shubin <nikita.shubin@maquefel.me>
    ---
    include/linux/soc/cirrus/ep93xx.h | 26 ++++++++++++++++++++++++++
    1 file changed, 26 insertions(+)

    diff --git a/include/linux/soc/cirrus/ep93xx.h b/include/linux/soc/cirrus/ep93xx.h
    index 56fbe2dc59b1..a27447971302 100644
    --- a/include/linux/soc/cirrus/ep93xx.h
    +++ b/include/linux/soc/cirrus/ep93xx.h
    @@ -3,6 +3,18 @@
    #define _SOC_EP93XX_H

    struct platform_device;
    +struct regmap;
    +struct spinlock_t;
    +
    +enum ep93xx_soc_model {
    + EP93XX_9301_SOC,
    + EP93XX_9307_SOC,
    + EP93XX_9312_SOC,
    +};
    +
    +#include <linux/auxiliary_bus.h>
    +#include <linux/compiler_types.h>
    +#include <linux/container_of.h>

    #define EP93XX_CHIP_REV_D0 3
    #define EP93XX_CHIP_REV_D1 4
    @@ -10,6 +22,20 @@ struct platform_device;
    #define EP93XX_CHIP_REV_E1 6
    #define EP93XX_CHIP_REV_E2 7

    +struct ep93xx_regmap_adev {
    + struct auxiliary_device adev;
    + struct regmap *map;
    + void __iomem *base;
    + spinlock_t *lock;
    + void (*write)(struct regmap *map, spinlock_t *lock, unsigned int reg,
    + unsigned int val);
    + void (*update_bits)(struct regmap *map, spinlock_t *lock,
    + unsigned int reg, unsigned int mask, unsigned int val);
    +};
    +
    +#define to_ep93xx_regmap_adev(_adev) \
    + container_of((_adev), struct ep93xx_regmap_adev, adev)
    +
    #ifdef CONFIG_ARCH_EP93XX
    int ep93xx_pwm_acquire_gpio(struct platform_device *pdev);
    void ep93xx_pwm_release_gpio(struct platform_device *pdev);
    --
    2.41.0


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