net: dsa: mv88e6xxx: group cycle counter coefficients

Instead of having them as individual fields in ptp_ops, wrap the
coefficients in a separate struct so they can be referenced together.

Fixes: de776d0 ("net: dsa: mv88e6xxx: add support for mv88e6393x family")
Signed-off-by: Shenghao Yang <[email protected]>
Reviewed-by: Andrew Lunn <[email protected]>
Signed-off-by: Paolo Abeni <[email protected]>

Author: shenghaoyang

drivers/net/dsa/mv88e6xxx/chip.h

@@ -206,6 +206,7 @@ struct mv88e6xxx_gpio_ops;
 struct mv88e6xxx_avb_ops;
 struct mv88e6xxx_ptp_ops;
 struct mv88e6xxx_pcs_ops;
+struct mv88e6xxx_cc_coeffs;
 
 struct mv88e6xxx_irq {
 	u16 masked;
@@ -731,10 +732,7 @@ struct mv88e6xxx_ptp_ops {
 	int arr1_sts_reg;
 	int dep_sts_reg;
 	u32 rx_filters;
-	u32 cc_shift;
-	u32 cc_mult;
-	u32 cc_mult_num;
-	u32 cc_mult_dem;
+	const struct mv88e6xxx_cc_coeffs *cc_coeffs;
 };
 
 struct mv88e6xxx_pcs_ops {

drivers/net/dsa/mv88e6xxx/ptp.c

@@ -18,17 +18,27 @@
 
 #define MV88E6XXX_MAX_ADJ_PPB	1000000
 
+struct mv88e6xxx_cc_coeffs {
+	u32 cc_shift;
+	u32 cc_mult;
+	u32 cc_mult_num;
+	u32 cc_mult_dem;
+};
+
 /* Family MV88E6250:
  * Raw timestamps are in units of 10-ns clock periods.
  *
  * clkadj = scaled_ppm * 10*2^28 / (10^6 * 2^16)
  * simplifies to
  * clkadj = scaled_ppm * 2^7 / 5^5
  */
-#define MV88E6250_CC_SHIFT	28
-#define MV88E6250_CC_MULT	(10 << MV88E6250_CC_SHIFT)
-#define MV88E6250_CC_MULT_NUM	(1 << 7)
-#define MV88E6250_CC_MULT_DEM	3125ULL
+#define MV88E6250_CC_SHIFT 28
+static const struct mv88e6xxx_cc_coeffs mv88e6250_cc_coeffs = {
+	.cc_shift = MV88E6250_CC_SHIFT,
+	.cc_mult = 10 << MV88E6250_CC_SHIFT,
+	.cc_mult_num = 1 << 7,
+	.cc_mult_dem = 3125ULL,
+};
 
 /* Other families:
  * Raw timestamps are in units of 8-ns clock periods.
@@ -37,10 +47,13 @@
  * simplifies to
  * clkadj = scaled_ppm * 2^9 / 5^6
  */
-#define MV88E6XXX_CC_SHIFT	28
-#define MV88E6XXX_CC_MULT	(8 << MV88E6XXX_CC_SHIFT)
-#define MV88E6XXX_CC_MULT_NUM	(1 << 9)
-#define MV88E6XXX_CC_MULT_DEM	15625ULL
+#define MV88E6XXX_CC_SHIFT 28
+static const struct mv88e6xxx_cc_coeffs mv88e6xxx_cc_coeffs = {
+	.cc_shift = MV88E6XXX_CC_SHIFT,
+	.cc_mult = 8 << MV88E6XXX_CC_SHIFT,
+	.cc_mult_num = 1 << 9,
+	.cc_mult_dem = 15625ULL
+};
 
 #define TAI_EVENT_WORK_INTERVAL msecs_to_jiffies(100)
 
@@ -214,10 +227,10 @@ static int mv88e6xxx_ptp_adjfine(struct ptp_clock_info *ptp, long scaled_ppm)
 		scaled_ppm = -scaled_ppm;
 	}
 
-	mult = ptp_ops->cc_mult;
-	adj = ptp_ops->cc_mult_num;
+	mult = ptp_ops->cc_coeffs->cc_mult;
+	adj = ptp_ops->cc_coeffs->cc_mult_num;
 	adj *= scaled_ppm;
-	diff = div_u64(adj, ptp_ops->cc_mult_dem);
+	diff = div_u64(adj, ptp_ops->cc_coeffs->cc_mult_dem);
 
 	mv88e6xxx_reg_lock(chip);
 
@@ -364,10 +377,7 @@ const struct mv88e6xxx_ptp_ops mv88e6165_ptp_ops = {
 		(1 << HWTSTAMP_FILTER_PTP_V2_EVENT) |
 		(1 << HWTSTAMP_FILTER_PTP_V2_SYNC) |
 		(1 << HWTSTAMP_FILTER_PTP_V2_DELAY_REQ),
-	.cc_shift = MV88E6XXX_CC_SHIFT,
-	.cc_mult = MV88E6XXX_CC_MULT,
-	.cc_mult_num = MV88E6XXX_CC_MULT_NUM,
-	.cc_mult_dem = MV88E6XXX_CC_MULT_DEM,
+	.cc_coeffs = &mv88e6xxx_cc_coeffs
 };
 
 const struct mv88e6xxx_ptp_ops mv88e6250_ptp_ops = {
@@ -391,10 +401,7 @@ const struct mv88e6xxx_ptp_ops mv88e6250_ptp_ops = {
 		(1 << HWTSTAMP_FILTER_PTP_V2_EVENT) |
 		(1 << HWTSTAMP_FILTER_PTP_V2_SYNC) |
 		(1 << HWTSTAMP_FILTER_PTP_V2_DELAY_REQ),
-	.cc_shift = MV88E6250_CC_SHIFT,
-	.cc_mult = MV88E6250_CC_MULT,
-	.cc_mult_num = MV88E6250_CC_MULT_NUM,
-	.cc_mult_dem = MV88E6250_CC_MULT_DEM,
+	.cc_coeffs = &mv88e6250_cc_coeffs,
 };
 
 const struct mv88e6xxx_ptp_ops mv88e6352_ptp_ops = {
@@ -418,10 +425,7 @@ const struct mv88e6xxx_ptp_ops mv88e6352_ptp_ops = {
 		(1 << HWTSTAMP_FILTER_PTP_V2_EVENT) |
 		(1 << HWTSTAMP_FILTER_PTP_V2_SYNC) |
 		(1 << HWTSTAMP_FILTER_PTP_V2_DELAY_REQ),
-	.cc_shift = MV88E6XXX_CC_SHIFT,
-	.cc_mult = MV88E6XXX_CC_MULT,
-	.cc_mult_num = MV88E6XXX_CC_MULT_NUM,
-	.cc_mult_dem = MV88E6XXX_CC_MULT_DEM,
+	.cc_coeffs = &mv88e6xxx_cc_coeffs,
 };
 
 const struct mv88e6xxx_ptp_ops mv88e6390_ptp_ops = {
@@ -446,10 +450,7 @@ const struct mv88e6xxx_ptp_ops mv88e6390_ptp_ops = {
 		(1 << HWTSTAMP_FILTER_PTP_V2_EVENT) |
 		(1 << HWTSTAMP_FILTER_PTP_V2_SYNC) |
 		(1 << HWTSTAMP_FILTER_PTP_V2_DELAY_REQ),
-	.cc_shift = MV88E6XXX_CC_SHIFT,
-	.cc_mult = MV88E6XXX_CC_MULT,
-	.cc_mult_num = MV88E6XXX_CC_MULT_NUM,
-	.cc_mult_dem = MV88E6XXX_CC_MULT_DEM,
+	.cc_coeffs = &mv88e6xxx_cc_coeffs,
 };
 
 static u64 mv88e6xxx_ptp_clock_read(const struct cyclecounter *cc)
@@ -487,8 +488,8 @@ int mv88e6xxx_ptp_setup(struct mv88e6xxx_chip *chip)
 	memset(&chip->tstamp_cc, 0, sizeof(chip->tstamp_cc));
 	chip->tstamp_cc.read	= mv88e6xxx_ptp_clock_read;
 	chip->tstamp_cc.mask	= CYCLECOUNTER_MASK(32);
-	chip->tstamp_cc.mult	= ptp_ops->cc_mult;
-	chip->tstamp_cc.shift	= ptp_ops->cc_shift;
+	chip->tstamp_cc.mult	= ptp_ops->cc_coeffs->cc_mult;
+	chip->tstamp_cc.shift	= ptp_ops->cc_coeffs->cc_shift;
 
 	timecounter_init(&chip->tstamp_tc, &chip->tstamp_cc,
 			 ktime_to_ns(ktime_get_real()));