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Subject[PATCH] ARM: at91/rtc-at91sam9: rework resources assignment
Date
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
---
Russell, Ryan,
As I do think that these changes need explanation, here is my rework of Jean's
patch. I would like to know if the little comment and general rework of
resources assignment sound ok...

I plan to merge this patch with the one discussed previously:
"[PATCH 13/18] ARM: at91/rtc-at91sam9: pass the GPBR to use via ressources"

If you agree, I will repost the whole series afterwards.


arch/arm/mach-at91/at91sam9260_devices.c | 13 ++++++++++---
arch/arm/mach-at91/at91sam9261_devices.c | 13 ++++++++++---
arch/arm/mach-at91/at91sam9263_devices.c | 22 ++++++++++++++++------
arch/arm/mach-at91/at91sam9g45_devices.c | 13 ++++++++++---
arch/arm/mach-at91/at91sam9rl_devices.c | 13 ++++++++++---
5 files changed, 56 insertions(+), 18 deletions(-)
diff --git a/arch/arm/mach-at91/at91sam9260_devices.c b/arch/arm/mach-at91/at91sam9260_devices.c
index f8a88fb..df487ce 100644
--- a/arch/arm/mach-at91/at91sam9260_devices.c
+++ b/arch/arm/mach-at91/at91sam9260_devices.c
@@ -727,7 +727,6 @@ static struct platform_device at91sam9260_rtt_device = {
.name = "at91_rtt",
.id = 0,
.resource = rtt_resources,
- .num_resources = 1,
};


@@ -735,13 +734,21 @@ static struct platform_device at91sam9260_rtt_device = {
static void __init at91_add_device_rtt_rtc(void)
{
at91sam9260_rtt_device.name = "rtc-at91sam9";
- at91sam9260_rtt_device.num_resources++;
+ /*
+ * The second resource is needed:
+ * GPBR will serve as the storage for RTC time offset
+ */
+ at91sam9260_rtt_device.num_resources = 2;
rtt_resources[1].start = AT91SAM9260_BASE_GPBR +
4 * CONFIG_RTC_DRV_AT91SAM9_GPBR;
rtt_resources[1].end = rtt_resources[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 */
+ at91sam9260_rtt_device.num_resources = 1;
+}
#endif

static void __init at91_add_device_rtt(void)
diff --git a/arch/arm/mach-at91/at91sam9261_devices.c b/arch/arm/mach-at91/at91sam9261_devices.c
index 32a20ef..3bd10ce 100644
--- a/arch/arm/mach-at91/at91sam9261_devices.c
+++ b/arch/arm/mach-at91/at91sam9261_devices.c
@@ -613,20 +613,27 @@ static struct platform_device at91sam9261_rtt_device = {
.name = "at91_rtt",
.id = 0,
.resource = rtt_resources,
- .num_resources = 1,
};

#if IS_ENABLED(CONFIG_RTC_DRV_AT91SAM9)
static void __init at91_add_device_rtt_rtc(void)
{
at91sam9261_rtt_device.name = "rtc-at91sam9";
- at91sam9261_rtt_device.num_resources++;
+ /*
+ * The second resource is needed:
+ * GPBR will serve as the storage for RTC time offset
+ */
+ at91sam9261_rtt_device.num_resources = 2;
rtt_resources[1].start = AT91SAM9261_BASE_GPBR +
4 * CONFIG_RTC_DRV_AT91SAM9_GPBR;
rtt_resources[1].end = rtt_resources[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 */
+ at91sam9261_rtt_device.num_resources = 1;
+}
#endif

static void __init at91_add_device_rtt(void)
diff --git a/arch/arm/mach-at91/at91sam9263_devices.c b/arch/arm/mach-at91/at91sam9263_devices.c
index 28cb074..7792de5 100644
--- a/arch/arm/mach-at91/at91sam9263_devices.c
+++ b/arch/arm/mach-at91/at91sam9263_devices.c
@@ -976,7 +976,6 @@ static struct platform_device at91sam9263_rtt0_device = {
.name = "at91_rtt",
.id = 0,
.resource = rtt0_resources,
- .num_resources = 1,
};

static struct resource rtt1_resources[] = {
@@ -993,7 +992,6 @@ static struct platform_device at91sam9263_rtt1_device = {
.name = "at91_rtt",
.id = 1,
.resource = rtt1_resources,
- .num_resources = 1,
};

#if IS_ENABLED(CONFIG_RTC_DRV_AT91SAM9)
@@ -1004,26 +1002,38 @@ static void __init at91_add_device_rtt_rtc(void)

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",
+ 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;
- pdev->name = "rtc-at91sam9";
- pdev->num_resources++;
}
#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)
diff --git a/arch/arm/mach-at91/at91sam9g45_devices.c b/arch/arm/mach-at91/at91sam9g45_devices.c
index bb7e2ce..4108295 100644
--- a/arch/arm/mach-at91/at91sam9g45_devices.c
+++ b/arch/arm/mach-at91/at91sam9g45_devices.c
@@ -1203,20 +1203,27 @@ static struct platform_device at91sam9g45_rtt_device = {
.name = "at91_rtt",
.id = 0,
.resource = rtt_resources,
- .num_resources = 1,
};

#if IS_ENABLED(CONFIG_RTC_DRV_AT91SAM9)
static void __init at91_add_device_rtt_rtc(void)
{
at91sam9g45_rtt_device.name = "rtc-at91sam9";
- at91sam9g45_rtt_device.num_resources++;
+ /*
+ * The second resource is needed:
+ * GPBR will serve as the storage for RTC time offset
+ */
+ at91sam9g45_rtt_device.num_resources = 2;
rtt_resources[1].start = AT91SAM9G45_BASE_GPBR +
4 * CONFIG_RTC_DRV_AT91SAM9_GPBR;
rtt_resources[1].end = rtt_resources[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 */
+ at91sam9g45_rtt_device.num_resources = 1;
+}
#endif

static void __init at91_add_device_rtt(void)
diff --git a/arch/arm/mach-at91/at91sam9rl_devices.c b/arch/arm/mach-at91/at91sam9rl_devices.c
index 16fd20b..eda72e8 100644
--- a/arch/arm/mach-at91/at91sam9rl_devices.c
+++ b/arch/arm/mach-at91/at91sam9rl_devices.c
@@ -692,20 +692,27 @@ static struct platform_device at91sam9rl_rtt_device = {
.name = "at91_rtt",
.id = 0,
.resource = rtt_resources,
- .num_resources = 1,
};

#if IS_ENABLED(CONFIG_RTC_DRV_AT91SAM9)
static void __init at91_add_device_rtt_rtc(void)
{
at91sam9rl_rtt_device.name = "rtc-at91sam9";
- at91sam9rl_rtt_device.num_resources++;
+ /*
+ * The second resource is needed:
+ * GPBR will serve as the storage for RTC time offset
+ */
+ at91sam9rl_rtt_device.num_resources = 2;
rtt_resources[1].start = AT91SAM9RL_BASE_GPBR +
4 * CONFIG_RTC_DRV_AT91SAM9_GPBR;
rtt_resources[1].end = rtt_resources[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 */
+ at91sam9rl_rtt_device.num_resources = 1;
+}
#endif

static void __init at91_add_device_rtt(void)
--
1.7.9


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