Merge branch 'ptp-ptp_clockmatrix-Fix-output-1-PPS-alignment'

Vincent Cheng says:

====================
ptp: ptp_clockmatrix: Fix output 1 PPS alignment.

This series fixes a race condition that may result in the output clock
not aligned to internal 1 PPS clock.

Part of device initialization is to align the rising edge of output
clocks to the internal rising edge of the 1 PPS clock.  If the system
APLL and DPLL are not locked when this alignment occurs, the alignment
fails and a fixed offset between the internal 1 PPS clock and the
output clock occurs.

If a clock is dynamically enabled after power-up, the output clock
also needs to be aligned to the internal 1 PPS clock.

v3:
Suggested by: Jakub Kicinski <kuba@kernel.org>
- Remove unnecessary 'err' variable
- Increase msleep()/loop accuracy by using jiffies in while()
- No empty lines between variables
- No empty lines between call and the if
- parenthesis around a == b are unnecessary
- Inconsistent \n usage in dev_()
- Remove unnecessary empty line
- Leave string format in place so static code checkers can
  validate arguments

v2:
Suggested by: Richard Cochran <richardcochran@gmail.com>
- Added const to "char * fmt"
- Break unrelated header change into separate patch
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/ptp/idt8a340_reg.h

@@ -122,6 +122,8 @@
 #define OTP_SCSR_CONFIG_SELECT            0x0022
 
 #define STATUS                            0xc03c
+#define DPLL_SYS_STATUS                   0x0020
+#define DPLL_SYS_APLL_STATUS              0x0021
 #define USER_GPIO0_TO_7_STATUS            0x008a
 #define USER_GPIO8_TO_15_STATUS           0x008b
 
@@ -707,4 +709,12 @@
 /* Bit definitions for the DPLL_CTRL_COMBO_MASTER_CFG register */
 #define COMBO_MASTER_HOLD                 BIT(0)
 
+/* Bit definitions for DPLL_SYS_STATUS register */
+#define DPLL_SYS_STATE_MASK               (0xf)
+
+/* Bit definitions for SYS_APLL_STATUS register */
+#define SYS_APLL_LOSS_LOCK_LIVE_MASK       BIT(0)
+#define SYS_APLL_LOSS_LOCK_LIVE_LOCKED     0
+#define SYS_APLL_LOSS_LOCK_LIVE_UNLOCKED   1
+
 #endif

drivers/ptp/ptp_clockmatrix.h

@@ -15,7 +15,6 @@
 #define FW_FILENAME	"idtcm.bin"
 #define MAX_TOD		(4)
 #define MAX_PLL		(8)
-#define MAX_OUTPUT	(12)
 
 #define MAX_ABS_WRITE_PHASE_PICOSECONDS (107374182350LL)
 
@@ -51,6 +50,9 @@
 #define TOD_WRITE_OVERHEAD_COUNT_MAX		(2)
 #define TOD_BYTE_COUNT				(11)
 
+#define LOCK_TIMEOUT_MS			(2000)
+#define LOCK_POLL_INTERVAL_MS		(10)
+
 #define PEROUT_ENABLE_OUTPUT_MASK	(0xdeadbeef)
 
 #define IDTCM_MAX_WRITE_COUNT		(512)
@@ -105,6 +107,18 @@ enum scsr_tod_write_type_sel {
 	SCSR_TOD_WR_TYPE_SEL_MAX = SCSR_TOD_WR_TYPE_SEL_DELTA_MINUS,
 };
 
+/* Values STATUS.DPLL_SYS_STATUS.DPLL_SYS_STATE */
+enum dpll_state {
+	DPLL_STATE_MIN = 0,
+	DPLL_STATE_FREERUN = DPLL_STATE_MIN,
+	DPLL_STATE_LOCKACQ = 1,
+	DPLL_STATE_LOCKREC = 2,
+	DPLL_STATE_LOCKED = 3,
+	DPLL_STATE_HOLDOVER = 4,
+	DPLL_STATE_OPEN_LOOP = 5,
+	DPLL_STATE_MAX = DPLL_STATE_OPEN_LOOP,
+};
+
 struct idtcm;
 
 struct idtcm_channel {
@@ -123,7 +137,6 @@ struct idtcm_channel {
 	enum pll_mode		pll_mode;
 	u8			pll;
 	u16			output_mask;
-	u8			output_phase_adj[MAX_OUTPUT][4];
 };
 
 struct idtcm {