ptp: idt82p33: Add PTP_CLK_REQ_EXTTS support

82P33 family of chips can trigger TOD read/write by external
signal from one of the IN12/13/14 pins, which are set user
space programs by calling PTP_PIN_SETFUNC through ptp_ioctl
Signed-off-by: Min Li <min.li.xe@renesas.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/ptp/ptp_idt82p33.h

@@ -13,6 +13,8 @@
 
 #define FW_FILENAME	"idt82p33xxx.bin"
 #define MAX_PHC_PLL	(2)
+#define MAX_TRIG_CLK	(3)
+#define MAX_PER_OUT	(11)
 #define TOD_BYTE_COUNT	(10)
 #define DCO_MAX_PPB     (92000)
 #define MAX_MEASURMENT_COUNT	(5)
@@ -60,8 +62,18 @@ struct idt82p33_channel {
 	struct ptp_clock	*ptp_clock;
 	struct idt82p33		*idt82p33;
 	enum pll_mode		pll_mode;
-	s32			current_freq_ppb;
+	/* Workaround for TOD-to-output alignment issue */
+	struct delayed_work	adjtime_work;
+	s32			current_freq;
+	/* double dco mode */
+	bool			ddco;
 	u8			output_mask;
+	/* last input trigger for extts */
+	u8			tod_trigger;
+	bool			discard_next_extts;
+	u8			plln;
+	/* remember last tod_sts for extts */
+	u8			extts_tod_sts[TOD_BYTE_COUNT];
 	u16			dpll_tod_cnfg;
 	u16			dpll_tod_trigger;
 	u16			dpll_tod_sts;
@@ -76,6 +88,12 @@ struct idt82p33 {
 	struct idt82p33_channel	channel[MAX_PHC_PLL];
 	struct device		*dev;
 	u8			pll_mask;
+	/* Polls for external time stamps */
+	u8			extts_mask;
+	bool			extts_single_shot;
+	struct delayed_work	extts_work;
+	/* Remember the ptp channel to report extts */
+	struct idt82p33_channel	*event_channel[MAX_PHC_PLL];
 	/* Mutex to protect operations from being interrupted */
 	struct mutex		*lock;
 	struct regmap		*regmap;