This patch adds the hooks into the PPC7D platforms file to
support the DS1337 RTC device as the clock device for the
PPC7D board.
Signed-off-by: Chris Elston
--- linux-2.6.12-rc2/arch/ppc/platforms/radstone_ppc7d.c
2005-04-07 12:31:43.0 +0100
+++ linux-2.6.12-rc2-cde/arch/ppc/platforms/radstone_ppc7d.c
2005-04-07 12:28:51.0 +0100
@@ -68,6 +68,7 @@
#define PPC7D_RST_PIN 17 /* GPP17 */
extern u32 mv64360_irq_base;
+extern spinlock_t rtc_lock;
static struct mv64x60_handle bh;
static int ppc7d_has_alma;
@@ -75,6 +76,11 @@
extern void gen550_progress(char *, unsigned short);
extern void gen550_init(int, struct uart_port *);
+/* FIXME - move to h file */
+extern int ds1337_do_command(int id, int cmd, void *arg);
+#define DS1337_GET_DATE 0
+#define DS1337_SET_DATE 1
+
/* residual data */
unsigned char __res[sizeof(bd_t)];
@@ -1236,6 +1248,38 @@
printk(KERN_INFO "Radstone Technology PPC7D\n");
if (ppc_md.progress)
ppc_md.progress("ppc7d_setup_arch: exit", 0);
+
+}
+
+/* Real Time Clock support.
+ * PPC7D has a DS1337 accessed by I2C.
+ */
+static ulong ppc7d_get_rtc_time(void)
+{
+struct rtc_time tm;
+int result;
+
+spin_lock(&rtc_lock);
+result = ds1337_do_command(0, DS1337_GET_DATE, &tm);
+spin_unlock(&rtc_lock);
+
+if (result == 0)
+result = mktime(tm.tm_year, tm.tm_mon, tm.tm_mday,
tm.tm_hour, tm.tm_min, tm.tm_sec);
+
+return result;
+}
+
+static int ppc7d_set_rtc_time(unsigned long nowtime)
+{
+struct rtc_time tm;
+int result;
+
+spin_lock(&rtc_lock);
+to_tm(nowtime, &tm);
+result = ds1337_do_command(0, DS1337_SET_DATE, &tm);
+spin_unlock(&rtc_lock);
+
+return result;
}
/* This kernel command line parameter can be used to have the target
@@ -1293,6 +1337,10 @@
data8 |= 0x07;
outb(data8, PPC7D_CPLD_LEDS);
+/* Hook up RTC. We couldn't do this earlier because we need the
I2C subsystem */
+ppc_md.set_rtc_time = ppc7d_set_rtc_time;
+ppc_md.get_rtc_time = ppc7d_get_rtc_time;
+
pr_debug("%s: exit\n", __FUNCTION__);
}
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