summaryrefslogtreecommitdiffstats
path: root/arch/arm/mach-at91/at91sam9263_devices.c
diff options
context:
space:
mode:
authorJean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>2012-02-15 21:24:46 +0800
committerNicolas Ferre <nicolas.ferre@atmel.com>2012-02-23 14:57:58 +0100
commitb3af8b49befdcc53cb5d89e57662c359bc0b6989 (patch)
tree7c53b06733ae3f00a4971b0a3e7f4deee83169d1 /arch/arm/mach-at91/at91sam9263_devices.c
parent4e9267f1b42b4f7b66214161b55f1f73365692cd (diff)
downloadlinux-b3af8b49befdcc53cb5d89e57662c359bc0b6989.tar.gz
linux-b3af8b49befdcc53cb5d89e57662c359bc0b6989.tar.bz2
linux-b3af8b49befdcc53cb5d89e57662c359bc0b6989.zip
ARM: at91/rtc-at91sam9: pass the GPBR to use via resources
The GPBR registers are used for storing RTC values. The GPBR registers to use are now provided using standard resource entry. The array is filled in SoC specific code. rtc-at91sam9 RTT as RTC driver is modified to retrieve this information. Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> [nicolas.ferre@atmel.com: rework resources assignment] Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com> Reviewed-by: Ryan Mallon <rmallon@gmail.com>
Diffstat (limited to 'arch/arm/mach-at91/at91sam9263_devices.c')
-rw-r--r--arch/arm/mach-at91/at91sam9263_devices.c30
1 files changed, 25 insertions, 5 deletions
diff --git a/arch/arm/mach-at91/at91sam9263_devices.c b/arch/arm/mach-at91/at91sam9263_devices.c
index b4a6adb39b22..a8ae6f507eed 100644
--- a/arch/arm/mach-at91/at91sam9263_devices.c
+++ b/arch/arm/mach-at91/at91sam9263_devices.c
@@ -967,6 +967,8 @@ static struct resource rtt0_resources[] = {
.start = AT91SAM9263_BASE_RTT0,
.end = AT91SAM9263_BASE_RTT0 + SZ_16 - 1,
.flags = IORESOURCE_MEM,
+ }, {
+ .flags = IORESOURCE_MEM,
}
};
@@ -974,7 +976,6 @@ static struct platform_device at91sam9263_rtt0_device = {
.name = "at91_rtt",
.id = 0,
.resource = rtt0_resources,
- .num_resources = ARRAY_SIZE(rtt0_resources),
};
static struct resource rtt1_resources[] = {
@@ -982,6 +983,8 @@ static struct resource rtt1_resources[] = {
.start = AT91SAM9263_BASE_RTT1,
.end = AT91SAM9263_BASE_RTT1 + SZ_16 - 1,
.flags = IORESOURCE_MEM,
+ }, {
+ .flags = IORESOURCE_MEM,
}
};
@@ -989,31 +992,48 @@ static struct platform_device at91sam9263_rtt1_device = {
.name = "at91_rtt",
.id = 1,
.resource = rtt1_resources,
- .num_resources = ARRAY_SIZE(rtt1_resources),
};
#if IS_ENABLED(CONFIG_RTC_DRV_AT91SAM9)
static void __init at91_add_device_rtt_rtc(void)
{
struct platform_device *pdev;
+ struct resource *r;
switch (CONFIG_RTC_DRV_AT91SAM9_RTT) {
case 0:
+ /*
+ * The second resource is needed only for the chosen RTT:
+ * GPBR will serve as the storage for RTC time offset
+ */
+ at91sam9263_rtt0_device.num_resources = 2;
+ at91sam9263_rtt1_device.num_resources = 1;
pdev = &at91sam9263_rtt0_device;
+ r = rtt0_resources;
break;
case 1:
+ at91sam9263_rtt0_device.num_resources = 1;
+ at91sam9263_rtt1_device.num_resources = 2;
pdev = &at91sam9263_rtt1_device;
+ r = rtt1_resources;
break;
default:
- pr_err("at91sam9263: support only 2 RTT (%d)\n",
- CONFIG_RTC_DRV_AT91SAM9_RTT);
+ pr_err("at91sam9263: only supports 2 RTT (%d)\n",
+ CONFIG_RTC_DRV_AT91SAM9_RTT);
return;
}
pdev->name = "rtc-at91sam9";
+ r[1].start = AT91SAM9263_BASE_GPBR + 4 * CONFIG_RTC_DRV_AT91SAM9_GPBR;
+ r[1].end = r[1].start + 3;
}
#else
-static void __init at91_add_device_rtt_rtc(void) {}
+static void __init at91_add_device_rtt_rtc(void)
+{
+ /* Only one resource is needed: RTT not used as RTC */
+ at91sam9263_rtt0_device.num_resources = 1;
+ at91sam9263_rtt1_device.num_resources = 1;
+}
#endif
static void __init at91_add_device_rtt(void)