rtc: pl031: convert the driver to driver model

With this patch, PL031 driver is converted to driver-model-compliant
driver. In addition, CONFIG_SYS_RTC_PL031_BASE is no longer valid.

Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
Signed-off-by: Alexander Graf <agraf@suse.de>

diff --git a/drivers/rtc/pl031.c b/drivers/rtc/pl031.c
index 8955805..8bf04f2 100644 (file)
--- a/drivers/rtc/pl031.c
+++ b/drivers/rtc/pl031.c
@@ -8,13 +8,11 @@
 
 #include <common.h>
 #include <command.h>
+#include <dm.h>
+#include <errno.h>
 #include <rtc.h>
-
-#if defined(CONFIG_CMD_DATE)
-
-#ifndef CONFIG_SYS_RTC_PL031_BASE
-#error CONFIG_SYS_RTC_PL031_BASE is not defined!
-#endif
+#include <asm/io.h>
+#include <asm/types.h>
 
 /*
  * Register definitions
@@ -30,78 +28,114 @@
 
 #define RTC_CR_START   (1 << 0)
 
-#define        RTC_WRITE_REG(addr, val) \
-                       (*(volatile unsigned int *)(CONFIG_SYS_RTC_PL031_BASE + (addr)) = (val))
-#define        RTC_READ_REG(addr)      \
-                       (*(volatile unsigned int *)(CONFIG_SYS_RTC_PL031_BASE + (addr)))
+struct pl031_platdata {
+       phys_addr_t base;
+};
 
-static int pl031_initted = 0;
+static inline u32 pl031_read_reg(struct udevice *dev, int reg)
+{
+       struct pl031_platdata *pdata = dev_get_platdata(dev);
 
-/* Enable RTC Start in Control register*/
-void rtc_init(void)
+       return readl(pdata->base + reg);
+}
+
+static inline u32 pl031_write_reg(struct udevice *dev, int reg, u32 value)
 {
-       RTC_WRITE_REG(RTC_CR, RTC_CR_START);
+       struct pl031_platdata *pdata = dev_get_platdata(dev);
 
-       pl031_initted = 1;
+       return writel(value, pdata->base + reg);
 }
 
 /*
- * Reset the RTC. We set the date back to 1970-01-01.
+ * Probe RTC device
+ */
+static int pl031_probe(struct udevice *dev)
+{
+       /* Enable RTC Start in Control register*/
+       pl031_write_reg(dev, RTC_CR, RTC_CR_START);
+
+       return 0;
+}
+
+/*
+ * Get the current time from the RTC
  */
-void rtc_reset(void)
+static int pl031_get(struct udevice *dev, struct rtc_time *tm)
 {
-       RTC_WRITE_REG(RTC_LR, 0x00);
-       if(!pl031_initted)
-               rtc_init();
+       unsigned long tim;
+
+       if (!tm)
+               return -EINVAL;
+
+       tim = pl031_read_reg(dev, RTC_DR);
+
+       rtc_to_tm(tim, tm);
+
+       debug("Get DATE: %4d-%02d-%02d (wday=%d)  TIME: %2d:%02d:%02d\n",
+             tm->tm_year, tm->tm_mon, tm->tm_mday, tm->tm_wday,
+             tm->tm_hour, tm->tm_min, tm->tm_sec);
+
+       return 0;
 }
 
 /*
  * Set the RTC
-*/
-int rtc_set(struct rtc_time *tmp)
+ */
+static int pl031_set(struct udevice *dev, const struct rtc_time *tm)
 {
        unsigned long tim;
 
-       if(!pl031_initted)
-               rtc_init();
+       if (!tm)
+               return -EINVAL;
 
-       if (tmp == NULL) {
-               puts("Error setting the date/time\n");
-               return -1;
-       }
+       debug("Set DATE: %4d-%02d-%02d (wday=%d)  TIME: %2d:%02d:%02d\n",
+             tm->tm_year, tm->tm_mon, tm->tm_mday, tm->tm_wday,
+             tm->tm_hour, tm->tm_min, tm->tm_sec);
 
        /* Calculate number of seconds this incoming time represents */
-       tim = rtc_mktime(tmp);
+       tim = rtc_mktime(tm);
 
-       RTC_WRITE_REG(RTC_LR, tim);
+       pl031_write_reg(dev, RTC_LR, tim);
 
-       return -1;
+       return 0;
 }
 
 /*
- * Get the current time from the RTC
+ * Reset the RTC. We set the date back to 1970-01-01.
  */
-int rtc_get(struct rtc_time *tmp)
+static int pl031_reset(struct udevice *dev)
 {
-       ulong tim;
+       pl031_write_reg(dev, RTC_LR, 0);
 
-       if(!pl031_initted)
-               rtc_init();
+       return 0;
+}
 
-       if (tmp == NULL) {
-               puts("Error getting the date/time\n");
-               return -1;
-       }
+static const struct rtc_ops pl031_ops = {
+       .get = pl031_get,
+       .set = pl031_set,
+       .reset = pl031_reset,
+};
 
-       tim = RTC_READ_REG(RTC_DR);
+static const struct udevice_id pl031_ids[] = {
+       { .compatible = "arm,pl031" },
+       { }
+};
 
-       rtc_to_tm(tim, tmp);
+static int pl031_ofdata_to_platdata(struct udevice *dev)
+{
+       struct pl031_platdata *pdata = dev_get_platdata(dev);
 
-       debug ( "Get DATE: %4d-%02d-%02d (wday=%d)  TIME: %2d:%02d:%02d\n",
-               tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday,
-               tmp->tm_hour, tmp->tm_min, tmp->tm_sec);
+       pdata->base = dev_read_addr(dev);
 
        return 0;
 }
 
-#endif
+U_BOOT_DRIVER(rtc_pl031) = {
+       .name   = "rtc-pl031",
+       .id     = UCLASS_RTC,
+       .of_match = pl031_ids,
+       .probe  = pl031_probe,
+       .ofdata_to_platdata = pl031_ofdata_to_platdata,
+       .platdata_auto_alloc_size = sizeof(struct pl031_platdata),
+       .ops    = &pl031_ops,
+};

diff --git a/include/configs/qemu-arm.h b/include/configs/qemu-arm.h
index 66729b7..f09a0e0 100644 (file)
--- a/include/configs/qemu-arm.h
+++ b/include/configs/qemu-arm.h
@@ -23,9 +23,6 @@
 /* For block devices, QEMU emulates an ICH9 AHCI controller over PCI */
 #define CONFIG_SYS_SCSI_MAX_SCSI_ID 6
 
-/* QEMU emulates the ARM AMBA PL031 RTC */
-#define CONFIG_SYS_RTC_PL031_BASE      0x09010000
-
 /* Environment options */
 #define CONFIG_ENV_SIZE                                SZ_64K
 

diff --git a/scripts/config_whitelist.txt b/scripts/config_whitelist.txt
index 94953d8..2c4ca12 100644 (file)
--- a/scripts/config_whitelist.txt
+++ b/scripts/config_whitelist.txt
@@ -4070,7 +4070,6 @@ CONFIG_SYS_RSTC_RMR_VAL
 CONFIG_SYS_RTC_BUS_NUM
 CONFIG_SYS_RTC_CNT
 CONFIG_SYS_RTC_OSCILLATOR
-CONFIG_SYS_RTC_PL031_BASE
 CONFIG_SYS_RTC_REG_BASE_ADDR
 CONFIG_SYS_RTC_SETUP
 CONFIG_SYS_RV3029_TCR