[src/trunk]: src/sys/arch/arm/nvidia Enable pcie on tegra210

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

details:   https://anonhg.NetBSD.org/src/rev/054b2bdd5905
branches:  trunk
changeset: 826732:054b2bdd5905
user:      jmcneill <jmcneill%NetBSD.org@localhost>
date:      Mon Sep 25 08:55:27 2017 +0000

description:
Enable pcie on tegra210

diffstat:

 sys/arch/arm/nvidia/tegra_pcie.c |  33 +++++++++++++++++++++++++++++----
 1 files changed, 29 insertions(+), 4 deletions(-)

diffs (76 lines):

diff -r 983e0e567177 -r 054b2bdd5905 sys/arch/arm/nvidia/tegra_pcie.c
--- a/sys/arch/arm/nvidia/tegra_pcie.c  Mon Sep 25 08:55:07 2017 +0000
+++ b/sys/arch/arm/nvidia/tegra_pcie.c  Mon Sep 25 08:55:27 2017 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: tegra_pcie.c,v 1.19 2017/07/20 01:45:38 jmcneill Exp $ */
+/* $NetBSD: tegra_pcie.c,v 1.20 2017/09/25 08:55:27 jmcneill Exp $ */
 
 /*-
  * Copyright (c) 2015 Jared D. McNeill <jmcneill%invisible.ca@localhost>
@@ -27,7 +27,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: tegra_pcie.c,v 1.19 2017/07/20 01:45:38 jmcneill Exp $");
+__KERNEL_RCSID(0, "$NetBSD: tegra_pcie.c,v 1.20 2017/09/25 08:55:27 jmcneill Exp $");
 
 #include <sys/param.h>
 #include <sys/bus.h>
@@ -92,6 +92,7 @@
 static int     tegra_pcie_intr(void *);
 static void    tegra_pcie_init(pci_chipset_tag_t, void *);
 static void    tegra_pcie_enable(struct tegra_pcie_softc *);
+static void    tegra_pcie_enable_clocks(struct tegra_pcie_softc *);
 static void    tegra_pcie_setup(struct tegra_pcie_softc * const);
 static void    tegra_pcie_conf_frag_map(struct tegra_pcie_softc * const,
                                         uint, uint);
@@ -126,9 +127,7 @@
 tegra_pcie_match(device_t parent, cfdata_t cf, void *aux)
 {
        const char * const compatible[] = {
-#if notyet
                "nvidia,tegra210-pcie",
-#endif
                "nvidia,tegra124-pcie",
                NULL
        };
@@ -188,6 +187,8 @@
        aprint_naive("\n");
        aprint_normal(": PCIE\n");
 
+       tegra_pcie_enable_clocks(sc);
+
        if (!fdtbus_intr_str(faa->faa_phandle, 0, intrstr, sizeof(intrstr))) {
                aprint_error_dev(self, "failed to decode interrupt\n");
                return;
@@ -313,6 +314,30 @@
 }
 
 static void
+tegra_pcie_enable_clocks(struct tegra_pcie_softc * const sc)
+{
+       const char *clock_names[] = { "pex", "afi", "pll_e", "cml" };
+       const char *reset_names[] = { "pex", "afi", "pcie_x" };
+       struct fdtbus_reset *rst;
+       struct clk *clk;
+       int n;
+
+       for (n = 0; n < __arraycount(clock_names); n++) {
+               clk = fdtbus_clock_get(sc->sc_phandle, clock_names[n]);
+               if (clk == NULL || clk_enable(clk) != 0)
+                       aprint_error_dev(sc->sc_dev, "couldn't enable clock %s\n",
+                           clock_names[n]);
+       }
+
+       for (n = 0; n < __arraycount(reset_names); n++) {
+               rst = fdtbus_reset_get(sc->sc_phandle, reset_names[n]);
+               if (rst == NULL || fdtbus_reset_deassert(rst) != 0)
+                       aprint_error_dev(sc->sc_dev, "couldn't de-assert reset %s\n",
+                           reset_names[n]);
+       }
+}
+
+static void
 tegra_pcie_setup(struct tegra_pcie_softc * const sc)
 {
        size_t i;