ARM: ep93xx: add regmap aux_dev

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>
Tested-by: Alexander Sverdlin <alexander.sverdlin@gmail.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Stephen Boyd <sboyd@kernel.org>

diff --git a/include/linux/soc/cirrus/ep93xx.h b/include/linux/soc/cirrus/ep93xx.h
index 56fbe2dc59b1caa02ae6971c3ae6140d41ca9665..a27447971302867e504cf34495f819a2f7b66961 100644 (file)
--- 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);