clk: spacemit: k1: spawn reset device from per-syscon clock drivers

The K1 reset driver in drivers/reset/spacemit/ binds by name (no DT
of_match), so the per-syscon clock drivers must spawn it.

Add a .bind hook to k1_mpmu_clk, k1_apbc_clk and k1_apmu_clk that
calls spacemit_k1_reset_bind() to instantiate a UCLASS_RESET sibling
on the same ofnode.

Also introduce k1_apbc2_clk here. Its kernel DT node has #reset-cells
but no #clock-cells, so the driver exists only as the binding hook
for the apbc2 reset spawn.

With this in place, references such as
  resets = <&syscon_apbc RESET_TWSI0>;
in the kernel-mainline DT resolve correctly.

Signed-off-by: Guodong Xu <guodong@riscstar.com>

diff --git a/drivers/clk/spacemit/clk-k1.c b/drivers/clk/spacemit/clk-k1.c
index a6be285c1a4b8ef9bbedc16d8f72a3f2dc22134b..6175cf0950003512213ea9f82e6c6fbf01b0feef 100644 (file)
--- a/drivers/clk/spacemit/clk-k1.c
+++ b/drivers/clk/spacemit/clk-k1.c
@@ -13,6 +13,7 @@
 #include <dm/lists.h>
 #include <regmap.h>
 #include <linux/clk-provider.h>
+#include <soc/spacemit/k1-reset.h>
 #include <soc/spacemit/k1-syscon.h>
 
 #include "clk_common.h"
@@ -1661,6 +1662,26 @@ U_BOOT_DRIVER(k1_pll_clk) = {
        .flags          = DM_FLAG_PRE_RELOC,
 };
 
+static int k1_mpmu_clk_bind(struct udevice *dev)
+{
+       return spacemit_k1_reset_bind(dev, SPACEMIT_K1_RESET_MPMU);
+}
+
+static int k1_apbc_clk_bind(struct udevice *dev)
+{
+       return spacemit_k1_reset_bind(dev, SPACEMIT_K1_RESET_APBC);
+}
+
+static int k1_apmu_clk_bind(struct udevice *dev)
+{
+       return spacemit_k1_reset_bind(dev, SPACEMIT_K1_RESET_APMU);
+}
+
+static int k1_apbc2_clk_bind(struct udevice *dev)
+{
+       return spacemit_k1_reset_bind(dev, SPACEMIT_K1_RESET_APBC2);
+}
+
 static const struct udevice_id k1_mpmu_clk_match[] = {
        { .compatible = "spacemit,k1-syscon-mpmu",
          .data = (ulong)&k1_ccu_mpmu_data },
@@ -1673,6 +1694,7 @@ U_BOOT_DRIVER(k1_mpmu_clk) = {
        .name           = "k1_mpmu_clk",
        .id             = UCLASS_CLK,
        .of_match       = k1_mpmu_clk_match,
+       .bind           = k1_mpmu_clk_bind,
        .probe          = k1_mpmu_clk_probe,
        .ops            = &k1_mpmu_clk_ops,
        .flags          = DM_FLAG_PRE_RELOC,
@@ -1690,6 +1712,7 @@ U_BOOT_DRIVER(k1_apbc_clk) = {
        .name           = "k1_apbc_clk",
        .id             = UCLASS_CLK,
        .of_match       = k1_apbc_clk_match,
+       .bind           = k1_apbc_clk_bind,
        .probe          = k1_apbc_clk_probe,
        .ops            = &k1_apbc_clk_ops,
        .flags          = DM_FLAG_PRE_RELOC,
@@ -1707,7 +1730,21 @@ U_BOOT_DRIVER(k1_apmu_clk) = {
        .name           = "k1_apmu_clk",
        .id             = UCLASS_CLK,
        .of_match       = k1_apmu_clk_match,
+       .bind           = k1_apmu_clk_bind,
        .probe          = k1_apmu_clk_probe,
        .ops            = &k1_apmu_clk_ops,
        .flags          = DM_FLAG_PRE_RELOC,
 };
+
+static const struct udevice_id k1_apbc2_clk_match[] = {
+       { .compatible = "spacemit,k1-syscon-apbc2" },
+       { /* sentinel */ },
+};
+
+U_BOOT_DRIVER(k1_apbc2_clk) = {
+       .name           = "k1_apbc2_clk",
+       .id             = UCLASS_CLK,
+       .of_match       = k1_apbc2_clk_match,
+       .bind           = k1_apbc2_clk_bind,
+       .flags          = DM_FLAG_PRE_RELOC,
+};