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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>
This commit is contained in:
H Hartley Sweeten 2017-02-15 09:35:24 -07:00 committed by Alexandre Belloni
parent 5594e88a44
commit 5e8bb41c51
1 changed files with 11 additions and 38 deletions
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49
arch/arm/mach-orion5x/ts78xx-setup.c
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@ -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)
{