ARM: at91/tclib: move initialization from alloc to probe

Move resource retrieval from atmel_tc_alloc to tc_probe to avoid lately
reporting resource related issues when a TC block user request a TC block.

Moreover, resources retrieval are usually done in the probe function,
thus moving them add some consistency with other drivers.

Initialization is done once, ie not every time a tc block is requested.
If it fails, the device is not appended to the list of tc blocks.

Furhermore, the device id is retrieved at probe as well, avoiding parsing
DT every time the user requests of tc block.

Signed-off-by: Gaël PORTAY <gael.portay@gmail.com>
Acked-by: Thierry Reding <thierry.reding@gmail.com>
Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>

1 files changed, 5 insertions, 3 deletions

diff --git a/include/linux/atmel_tc.h b/include/linux/atmel_tc.h
index 89a931babecf..d8aa88461c64 100644
--- a/include/linux/atmel_tc.h
+++ b/include/linux/atmel_tc.h
@@ -44,12 +44,13 @@ struct atmel_tcb_config {
 /**
  * struct atmel_tc - information about a Timer/Counter Block
  * @pdev: physical device
- * @iomem: resource associated with the I/O register
  * @regs: mapping through which the I/O registers can be accessed
+ * @id: block id
  * @tcb_config: configuration data from SoC
  * @irq: irq for each of the three channels
  * @clk: internal clock source for each of the three channels
  * @node: list node, for tclib internal use
+ * @allocated: if already used, for tclib internal use
  *
  * On some platforms, each TC channel has its own clocks and IRQs,
  * while on others, all TC channels share the same clock and IRQ.
@@ -61,15 +62,16 @@ struct atmel_tcb_config {
  */
 struct atmel_tc {
         struct platform_device  *pdev;
-        struct resource         *iomem;
         void __iomem            *regs;
+        int                     id;
         const struct atmel_tcb_config *tcb_config;
         int                     irq[3];
         struct clk              *clk[3];
         struct list_head        node;
+        bool                    allocated;
 };
 
-extern struct atmel_tc *atmel_tc_alloc(unsigned block, const char *name);
+extern struct atmel_tc *atmel_tc_alloc(unsigned block);
 extern void atmel_tc_free(struct atmel_tc *tc);
 
 /* platform-specific ATMEL_TC_TIMER_CLOCKx divisors (0 means 32KiHz) */