[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 07152b7..c98eea4 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);