[AVR32] SMC configuration in clock cycles

This patch makes the SMC configuration take timings in clock cycles
instead of nanoseconds. A function to calculate timings in clock
cycles is added.

This patch removes the rounding troubles of the previous SMC
configuration method.

[hskinnemoen@atmel.com: fix atstk1002/atngw100 flash config]
Signed-off-by: Kristoffer Nyborg Gregertsen <gregerts@stud.ntnu.no>
Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>

1 files changed, 41 insertions, 10 deletions

diff --git a/include/asm-avr32/arch-at32ap/smc.h b/include/asm-avr32/arch-at32ap/smc.h
index 07152b7fd9c9..c98eea44a70a 100644
--- a/include/asm-avr32/arch-at32ap/smc.h
+++ b/include/asm-avr32/arch-at32ap/smc.h
@@ -15,22 +15,50 @@
 /*
  * All timing parameters are in nanoseconds.
  */
+struct smc_timing {
+        /* Delay from address valid to assertion of given strobe */
+        int ncs_read_setup;
+        int nrd_setup;
+        int ncs_write_setup;
+        int nwe_setup;
+
+        /* Pulse length of given strobe */
+        int ncs_read_pulse;
+        int nrd_pulse;
+        int ncs_write_pulse;
+        int nwe_pulse;
+
+        /* Total cycle length of given operation */
+        int read_cycle;
+        int write_cycle;
+
+        /* Minimal recovery times, will extend cycle if needed */
+        int ncs_read_recover;
+        int nrd_recover;
+        int ncs_write_recover;
+        int nwe_recover;
+};
+
+/*
+ * All timing parameters are in clock cycles.
+ */
 struct smc_config {
+
         /* Delay from address valid to assertion of given strobe */
-        u16             ncs_read_setup;
-        u16             nrd_setup;
-        u16             ncs_write_setup;
-        u16             nwe_setup;
+        u8              ncs_read_setup;
+        u8              nrd_setup;
+        u8              ncs_write_setup;
+        u8              nwe_setup;
 
         /* Pulse length of given strobe */
-        u16             ncs_read_pulse;
-        u16             nrd_pulse;
-        u16             ncs_write_pulse;
-        u16             nwe_pulse;
+        u8              ncs_read_pulse;
+        u8              nrd_pulse;
+        u8              ncs_write_pulse;
+        u8              nwe_pulse;
 
         /* Total cycle length of given operation */
-        u16             read_cycle;
-        u16             write_cycle;
+        u8              read_cycle;
+        u8              write_cycle;
 
         /* Bus width in bytes */
         u8              bus_width;
@@ -76,6 +104,9 @@ struct smc_config {
         unsigned int    tdf_mode:1;
 };
 
+extern void smc_set_timing(struct smc_config *config,
+                           const struct smc_timing *timing);
+
 extern int smc_set_configuration(int cs, const struct smc_config *config);
 extern struct smc_config *smc_get_configuration(int cs);