ARM: Orion5x: ts78xx: remove RTC detection

The rtc-m48t86 driver now handles the RTC detection. Remove the
redundant code from the platform.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Acked-By: Alexander Clouter <alex+kernel@digriz.org.uk>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>

1 files changed, 12 insertions, 39 deletions

diff --git a/arch/arm/mach-orion5x/ts78xx-setup.c b/arch/arm/mach-orion5x/ts78xx-setup.c
index 8d597267d0c4..cb4c3747214a 100644
--- a/arch/arm/mach-orion5x/ts78xx-setup.c
+++ b/arch/arm/mach-orion5x/ts78xx-setup.c
@@ -109,50 +109,23 @@ static struct platform_device ts78xx_ts_rtc_device = {
         .num_resources  = 0,
 };
 
-/*
- * TS uses some of the user storage space on the RTC chip so see if it is
- * present; as it's an optional feature at purchase time and not all boards
- * will have it present
- *
- * I've used the method TS use in their rtc7800.c example for the detection
- *
- * TODO: track down a guinea pig without an RTC to see if we can work out a
- *              better RTC detection routine
- */
 static int ts78xx_ts_rtc_load(void)
 {
         int rc;
-        unsigned char tmp_rtc0, tmp_rtc1;
-
-        tmp_rtc0 = ts78xx_ts_rtc_readbyte(126);
-        tmp_rtc1 = ts78xx_ts_rtc_readbyte(127);
-
-        ts78xx_ts_rtc_writebyte(0x00, 126);
-        ts78xx_ts_rtc_writebyte(0x55, 127);
-        if (ts78xx_ts_rtc_readbyte(127) == 0x55) {
-                ts78xx_ts_rtc_writebyte(0xaa, 127);
-                if (ts78xx_ts_rtc_readbyte(127) == 0xaa
-                                && ts78xx_ts_rtc_readbyte(126) == 0x00) {
-                        ts78xx_ts_rtc_writebyte(tmp_rtc0, 126);
-                        ts78xx_ts_rtc_writebyte(tmp_rtc1, 127);
-
-                        if (ts78xx_fpga.supports.ts_rtc.init == 0) {
-                                rc = platform_device_register(&ts78xx_ts_rtc_device);
-                                if (!rc)
-                                        ts78xx_fpga.supports.ts_rtc.init = 1;
-                        } else
-                                rc = platform_device_add(&ts78xx_ts_rtc_device);
-
-                        if (rc)
-                                pr_info("RTC could not be registered: %d\n",
-                                        rc);
-                        return rc;
-                }
+
+        if (ts78xx_fpga.supports.ts_rtc.init == 0) {
+                rc = platform_device_register(&ts78xx_ts_rtc_device);
+                if (!rc)
+                        ts78xx_fpga.supports.ts_rtc.init = 1;
+        } else {
+                rc = platform_device_add(&ts78xx_ts_rtc_device);
         }
 
-        pr_info("RTC not found\n");
-        return -ENODEV;
-};
+        if (rc)
+                pr_info("RTC could not be registered: %d\n", rc);
+
+        return rc;
+}
 
 static void ts78xx_ts_rtc_unload(void)
 {