add support for getting the frequency of the clocks mventa uses.

mvneta does interrupt coalescing based on time as counted by these
clocks, so being able to ask how fast they tick is useful.

lots of help and ok kettenis@

diff --git a/sys/dev/fdt/mvclock.c b/sys/dev/fdt/mvclock.c
index fb1e062..48813f5 100644 (file)
--- a/sys/dev/fdt/mvclock.c
+++ b/sys/dev/fdt/mvclock.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: mvclock.c,v 1.12 2022/05/17 10:09:40 kettenis Exp $   */
+/*     $OpenBSD: mvclock.c,v 1.13 2022/06/05 02:43:44 dlg Exp $        */
 /*
  * Copyright (c) 2018 Mark Kettenis <kettenis@openbsd.org>
  *
@@ -252,15 +252,39 @@ cp110_enable(void *cookie, uint32_t *cells, int on)
 
 /* Armada 3700 Periph block */
 
-#define PERIPH_NB_MMC                  0x0
-#define PERIPH_NB_SQF                  0x7
-#define PERIPH_NB_I2C2                 0x9
-#define PERIPH_NB_I2C1                 0xa
+/* North Bridge clocks */
+#define PERIPH_NB_MMC                  0x00
+#define PERIPH_NB_SATA                 0x01 /* SATA Host */
+#define PERIPH_NB_SEC_AT               0x02 /* Security AT */
+#define PERIPH_NB_SEC_DAP              0x03 /* Security DAP */
+#define PERIPH_NB_TSECM                        0x04 /* Security Engine */
+#define PERIPH_NB_SETM_TMX             0x05 /* Serial Embedded Trace Module */
+#define PERIPH_NB_AVS                  0x06 /* Adaptive Voltage Scaling */
+#define PERIPH_NB_SQF                  0x07 /* SPI */
+#define PERIPH_NB_I2C2                 0x09
+#define PERIPH_NB_I2C1                 0x0a
+#define PERIPH_NB_DDR_PHY              0x0b
+#define PERIPH_NB_DDR_FCLK             0x0c
+#define PERIPH_NB_TRACE                        0x0d
+#define PERIPH_NB_COUNTER              0x0e
+#define PERIPH_NB_EIO97                        0x0f
 #define PERIPH_NB_CPU                  0x10
-#define PERIPH_SB_GBE1_CORE            0x7
-#define PERIPH_SB_GBE0_CORE            0x8
-#define PERIPH_SB_USB32_USB2_SYS       0xb
-#define PERIPH_SB_USB32_SS_SYS         0xc
+
+/* South Bridge clocks */
+#define PERIPH_SB_GBE_50               0x00 /* 50MHz parent for gbe */
+#define PERIPH_SB_GBE_CORE             0x01 /* parent for gbe core */
+#define PERIPH_SB_GBE_125              0x02 /* 125MHz parent for gbe */
+#define PERIPH_SB_GBE1_50              0x03 /* 50MHz parent for gbe port 1 */
+#define PERIPH_SB_GBE0_50              0x04 /* 50MHz parent for gbe port 0 */
+#define PERIPH_SB_GBE1_125             0x05 /* 125MHz parent for gbe port 1 */
+#define PERIPH_SB_GBE0_125             0x06 /* 125MHz parent for gbe port 0 */
+#define PERIPH_SB_GBE1_CORE            0x07 /* gbe core port 1 */
+#define PERIPH_SB_GBE0_CORE            0x08 /* gbe core port 0 */
+#define PERIPH_SB_GBE_BM               0x09 /* gbe buffer manager */
+#define PERIPH_SB_SDIO                 0x0a
+#define PERIPH_SB_USB32_USB2_SYS       0x0b /* USB 2 clock */
+#define PERIPH_SB_USB32_SS_SYS         0x0c /* USB 3 clock */
+#define PERIPH_SB_PCIE                 0x0d
 
 #define PERIPH_TBG_SEL                 0x0
 #define  PERIPH_TBG_SEL_MASK                   0x3
@@ -354,7 +378,29 @@ a3700_periph_sb_enable(void *cookie, uint32_t *cells, int on)
 uint32_t
 a3700_periph_sb_get_frequency(void *cookie, uint32_t *cells)
 {
+       struct mvclock_softc *sc = cookie;
        uint32_t idx = cells[0];
+       uint32_t freq;
+
+       switch (idx) {
+       case PERIPH_SB_GBE_CORE:
+               freq = a3700_periph_tbg_get_frequency(sc, 8);
+               freq /= a3700_periph_get_double_div(sc,
+                   PERIPH_DIV_SEL1, 18, 21);
+               return freq;
+       case PERIPH_SB_GBE1_CORE:
+               idx = PERIPH_SB_GBE_CORE;
+               freq = a3700_periph_sb_get_frequency(sc, &idx);
+               freq /= a3700_periph_get_div(sc, PERIPH_DIV_SEL1, 13) + 1;
+               return freq;
+       case PERIPH_SB_GBE0_CORE:
+               idx = PERIPH_SB_GBE_CORE;
+               freq = a3700_periph_sb_get_frequency(sc, &idx);
+               freq /= a3700_periph_get_div(sc, PERIPH_DIV_SEL1, 14) + 1;
+               return freq;
+       default:
+               break;
+       }
 
        printf("%s: 0x%08x\n", __func__, idx);
        return 0;