[src/trunk]: src/sys/arch/arm/sunxi Fix AHB2 register definition and explicit...

[jmcneill <jmcneill%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/ff3238d0c6b2
branches:  trunk
changeset: 825292:ff3238d0c6b2
user:      jmcneill <jmcneill%NetBSD.org@localhost>
date:      Fri Jul 07 21:19:50 2017 +0000

description:
Fix AHB2 register definition and explicitly set AHB2 parent to PLL_PERIPH0/2 -- this gives us 50% more bus bandwidth for emac

diffstat:

 sys/arch/arm/sunxi/sun8i_h3_ccu.c |  23 ++++++++++++++++++++---
 1 files changed, 20 insertions(+), 3 deletions(-)

diffs (64 lines):

diff -r c3cdd2868896 -r ff3238d0c6b2 sys/arch/arm/sunxi/sun8i_h3_ccu.c
--- a/sys/arch/arm/sunxi/sun8i_h3_ccu.c Fri Jul 07 21:01:58 2017 +0000
+++ b/sys/arch/arm/sunxi/sun8i_h3_ccu.c Fri Jul 07 21:19:50 2017 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: sun8i_h3_ccu.c,v 1.6 2017/07/02 13:36:46 jmcneill Exp $ */
+/* $NetBSD: sun8i_h3_ccu.c,v 1.7 2017/07/07 21:19:50 jmcneill Exp $ */
 
 /*-
  * Copyright (c) 2017 Jared McNeill <jmcneill%invisible.ca@localhost>
@@ -29,7 +29,7 @@
 
 #include <sys/cdefs.h>
 
-__KERNEL_RCSID(1, "$NetBSD: sun8i_h3_ccu.c,v 1.6 2017/07/02 13:36:46 jmcneill Exp $");
+__KERNEL_RCSID(1, "$NetBSD: sun8i_h3_ccu.c,v 1.7 2017/07/07 21:19:50 jmcneill Exp $");
 
 #include <sys/param.h>
 #include <sys/bus.h>
@@ -44,6 +44,9 @@
 #define        PLL_PERIPH0_CTRL_REG    0x028
 #define        AHB1_APB1_CFG_REG       0x054
 #define        APB2_CFG_REG            0x058
+#define        AHB2_CFG_REG            0x05c
+#define         AHB2_CLK_CFG           __BITS(1,0)
+#define         AHB2_CLK_CFG_PLL_PERIPH0_2     1
 #define        BUS_CLK_GATING_REG0     0x060
 #define        BUS_CLK_GATING_REG2     0x068
 #define        BUS_CLK_GATING_REG3     0x06c
@@ -157,7 +160,7 @@
            SUNXI_CCU_PREDIV_POWER_OF_TWO),
 
        SUNXI_CCU_PREDIV(H3_CLK_AHB2, "ahb2", ahb2_parents,
-           APB2_CFG_REG,       /* reg */
+           AHB2_CFG_REG,       /* reg */
            0,                  /* prediv */
            __BIT(1),           /* prediv_sel */
            0,                  /* div */
@@ -251,6 +254,18 @@
            USBPHY_CFG_REG, 19),
 };
 
+static void
+sun8i_h3_ccu_init(struct sunxi_ccu_softc *sc)
+{
+       uint32_t val;
+
+       /* Set AHB2 source to PLL_PERIPH/2 */
+       val = CCU_READ(sc, AHB2_CFG_REG);
+       val &= ~AHB2_CLK_CFG;
+       val |= __SHIFTIN(AHB2_CLK_CFG_PLL_PERIPH0_2, AHB2_CLK_CFG);
+       CCU_WRITE(sc, AHB2_CFG_REG, val);
+}
+
 static int
 sun8i_h3_ccu_match(device_t parent, cfdata_t cf, void *aux)
 {
@@ -281,5 +296,7 @@
        aprint_naive("\n");
        aprint_normal(": H3 CCU\n");
 
+       sun8i_h3_ccu_init(sc);
+
        sunxi_ccu_print(sc);
 }