clk: renesas: rcar-gen3: Factor out CPG library

R-Car V3U has a CPG different enough to not be a generic Gen3 CPG but
similar enough to reuse code. Introduce a new CPG library, factor out
the SD clock handling and hook it to the generic Gen3 CPG driver so we
have an equal state. V3U will make use of it in the next patch then.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Link: https://lore.kernel.org/r/20201227174202.40834-4-wsa+renesas@sang-engineering.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

1 files changed, 33 insertions, 0 deletions

diff --git a/drivers/clk/renesas/rcar-cpg-lib.h b/drivers/clk/renesas/rcar-cpg-lib.h
new file mode 100644
index 000000000000..d00c91b116ca
--- /dev/null
+++ b/drivers/clk/renesas/rcar-cpg-lib.h
@@ -0,0 +1,33 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * R-Car Gen3 Clock Pulse Generator Library
+ *
+ * Copyright (C) 2015-2018 Glider bvba
+ * Copyright (C) 2019 Renesas Electronics Corp.
+ *
+ * Based on clk-rcar-gen3.c
+ *
+ * Copyright (C) 2015 Renesas Electronics Corp.
+ */
+
+#ifndef __CLK_RENESAS_RCAR_CPG_LIB_H__
+#define __CLK_RENESAS_RCAR_CPG_LIB_H__
+
+extern spinlock_t cpg_lock;
+
+struct cpg_simple_notifier {
+	struct notifier_block nb;
+	void __iomem *reg;
+	u32 saved;
+};
+
+void cpg_simple_notifier_register(struct raw_notifier_head *notifiers,
+				  struct cpg_simple_notifier *csn);
+
+void cpg_reg_modify(void __iomem *reg, u32 clear, u32 set);
+
+struct clk * __init cpg_sd_clk_register(const char *name,
+	void __iomem *base, unsigned int offset, const char *parent_name,
+	struct raw_notifier_head *notifiers, bool skip_first);
+
+#endif