Merge remote-tracking branches 'regulator/fix/88pm800', 'regulator/fix/max8973',...

[linux-drm-fsl-dcu.git] / arch / arm / mach-prima2 / rtciobrg.c

diff --git a/arch/arm/mach-prima2/rtciobrg.c b/arch/arm/mach-prima2/rtciobrg.c
index 8f66d8f7ca75e5d12ccbfb14b5f632918b722edb..d4852d24dc7d44010c400ba9425847f96c81eee8 100644 (file)
--- a/arch/arm/mach-prima2/rtciobrg.c
+++ b/arch/arm/mach-prima2/rtciobrg.c
@@ -1,5 +1,5 @@
 /*
- * RTC I/O Bridge interfaces for CSR SiRFprimaII
+ * RTC I/O Bridge interfaces for CSR SiRFprimaII/atlas7
  * ARM access the registers of SYSRTC, GPSRTC and PWRC through this module
  *
  * Copyright (c) 2011 Cambridge Silicon Radio Limited, a CSR plc group company.
@@ -10,6 +10,7 @@
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/io.h>
+#include <linux/regmap.h>
 #include <linux/of.h>
 #include <linux/of_address.h>
 #include <linux/of_device.h>
@@ -66,6 +67,7 @@ u32 sirfsoc_rtc_iobrg_readl(u32 addr)
 {
        unsigned long flags, val;
 
+       /* TODO: add hwspinlock to sync with M3 */
        spin_lock_irqsave(&rtciobrg_lock, flags);
 
        val = __sirfsoc_rtc_iobrg_readl(addr);
@@ -90,6 +92,7 @@ void sirfsoc_rtc_iobrg_writel(u32 val, u32 addr)
 {
        unsigned long flags;
 
+        /* TODO: add hwspinlock to sync with M3 */
        spin_lock_irqsave(&rtciobrg_lock, flags);
 
        sirfsoc_rtc_iobrg_pre_writel(val, addr);
@@ -102,6 +105,45 @@ void sirfsoc_rtc_iobrg_writel(u32 val, u32 addr)
 }
 EXPORT_SYMBOL_GPL(sirfsoc_rtc_iobrg_writel);
 
+
+static int regmap_iobg_regwrite(void *context, unsigned int reg,
+                                  unsigned int val)
+{
+       sirfsoc_rtc_iobrg_writel(val, reg);
+       return 0;
+}
+
+static int regmap_iobg_regread(void *context, unsigned int reg,
+                                 unsigned int *val)
+{
+       *val = (u32)sirfsoc_rtc_iobrg_readl(reg);
+       return 0;
+}
+
+static struct regmap_bus regmap_iobg = {
+       .reg_write = regmap_iobg_regwrite,
+       .reg_read = regmap_iobg_regread,
+};
+
+/**
+ * devm_regmap_init_iobg(): Initialise managed register map
+ *
+ * @iobg: Device that will be interacted with
+ * @config: Configuration for register map
+ *
+ * The return value will be an ERR_PTR() on error or a valid pointer
+ * to a struct regmap.  The regmap will be automatically freed by the
+ * device management code.
+ */
+struct regmap *devm_regmap_init_iobg(struct device *dev,
+                                   const struct regmap_config *config)
+{
+       const struct regmap_bus *bus = &regmap_iobg;
+
+       return devm_regmap_init(dev, bus, dev, config);
+}
+EXPORT_SYMBOL_GPL(devm_regmap_init_iobg);
+
 static const struct of_device_id rtciobrg_ids[] = {
        { .compatible = "sirf,prima2-rtciobg" },
        {}
@@ -132,7 +174,7 @@ static int __init sirfsoc_rtciobrg_init(void)
 }
 postcore_initcall(sirfsoc_rtciobrg_init);
 
-MODULE_AUTHOR("Zhiwu Song <zhiwu.song@csr.com>, "
-               "Barry Song <baohua.song@csr.com>");
+MODULE_AUTHOR("Zhiwu Song <zhiwu.song@csr.com>");
+MODULE_AUTHOR("Barry Song <baohua.song@csr.com>");
 MODULE_DESCRIPTION("CSR SiRFprimaII rtc io bridge");
 MODULE_LICENSE("GPL v2");