[PATCH 04/16] clk: samsung: artpec-8: Add initial clock support

[ksk4725@coasia.com]

From: Hakyeong Kim <hgkim05@coasia.com>

Add initial clock support for ARTPEC-8 SoC which is required
for enabling basic clock management.

Add clock support for below CMU block in ARTPEC-8 SoC:
 - CMU_IMEM

Signed-off-by: Ravi Patel <ravi.patel@samsung.com>
Signed-off-by: Hakyeong Kim <hgkim05@coasia.com>
---
 drivers/clk/samsung/Kconfig       |  8 ++++
 drivers/clk/samsung/Makefile      |  1 +
 drivers/clk/samsung/clk-artpec8.c | 62 +++++++++++++++++++++++++++++++
 3 files changed, 71 insertions(+)
 create mode 100644 drivers/clk/samsung/clk-artpec8.c

diff --git a/drivers/clk/samsung/Kconfig b/drivers/clk/samsung/Kconfig
index 76a494e95027..289591b403ad 100644
--- a/drivers/clk/samsung/Kconfig
+++ b/drivers/clk/samsung/Kconfig
@@ -13,6 +13,7 @@ config COMMON_CLK_SAMSUNG
 	select EXYNOS_5420_COMMON_CLK if ARM && SOC_EXYNOS5420
 	select EXYNOS_ARM64_COMMON_CLK if ARM64 && ARCH_EXYNOS
 	select TESLA_FSD_COMMON_CLK if ARM64 && ARCH_TESLA_FSD
+	select ARTPEC8_COMMON_CLK if ARM64 && ARCH_ARTPEC8
 
 config S3C64XX_COMMON_CLK
 	bool "Samsung S3C64xx clock controller support" if COMPILE_TEST
@@ -102,3 +103,10 @@ config TESLA_FSD_COMMON_CLK
 	help
 	  Support for the clock controller present on the Tesla FSD SoC.
 	  Choose Y here only if you build for this SoC.
+
+config ARTPEC8_COMMON_CLK
+	bool "Axis ARTPEC-8 clock controller support" if COMPILE_TEST
+	depends on COMMON_CLK_SAMSUNG
+	help
+	  Support for the clock controller present on the Axis ARTPEC-8 SoC.
+	  Choose Y here only if you are building for the Axis ARTPEC-8 SoC.
diff --git a/drivers/clk/samsung/Makefile b/drivers/clk/samsung/Makefile
index b77fe288e4bb..473eb08fc8fc 100644
--- a/drivers/clk/samsung/Makefile
+++ b/drivers/clk/samsung/Makefile
@@ -3,6 +3,7 @@
 # Samsung Clock specific Makefile
 #
 
+obj-$(CONFIG_ARTPEC8_COMMON_CLK)	+= clk-artpec8.o
 obj-$(CONFIG_COMMON_CLK)	+= clk.o clk-pll.o clk-cpu.o
 obj-$(CONFIG_EXYNOS_3250_COMMON_CLK)	+= clk-exynos3250.o
 obj-$(CONFIG_EXYNOS_4_COMMON_CLK)	+= clk-exynos4.o
diff --git a/drivers/clk/samsung/clk-artpec8.c b/drivers/clk/samsung/clk-artpec8.c
new file mode 100644
index 000000000000..11a48b2fcc09
--- /dev/null
+++ b/drivers/clk/samsung/clk-artpec8.c
@@ -0,0 +1,62 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2022-2025 Samsung Electronics Co., Ltd.
+ *             https://www.samsung.com
+ * Copyright (c) 2022-2025  Axis Communications AB.
+ *             https://www.axis.com
+ *
+ * Common Clock Framework support for ARTPEC-8 SoC.
+ */
+
+#include <linux/clk-provider.h>
+#include <dt-bindings/clock/axis,artpec8-clk.h>
+
+#include "clk.h"
+
+/* NOTE: Must be equal to the last clock ID increased by one */
+#define CMU_IMEM_NR_CLK			(MOUT_IMEM_JPEG_USER + 1)
+
+/* Register Offset definitions for CMU_IMEM (0x10010000) */
+#define PLL_CON0_MUX_CLK_IMEM_ACLK_USER			0x0100
+#define PLL_CON0_MUX_CLK_IMEM_JPEG_USER			0x0120
+#define MUX_CLK_IMEM_GIC_CA53				0x1000
+#define MUX_CLK_IMEM_GIC_CA5				0x1008
+
+static const unsigned long cmu_imem_clk_regs[] __initconst = {
+	PLL_CON0_MUX_CLK_IMEM_ACLK_USER,
+	PLL_CON0_MUX_CLK_IMEM_JPEG_USER,
+	MUX_CLK_IMEM_GIC_CA53,
+	MUX_CLK_IMEM_GIC_CA5,
+};
+
+PNAME(mout_imem_aclk_user_p) = { "fin_pll", "dout_clkcmu_imem_aclk" };
+PNAME(mout_imem_gic_ca53_p) = { "mout_imem_aclk_user", "fin_pll" };
+PNAME(mout_imem_gic_ca5_p) = { "mout_imem_aclk_user", "fin_pll" };
+PNAME(mout_imem_jpeg_user_p) = { "fin_pll", "dout_clkcmu_imem_jpeg" };
+
+static const struct samsung_mux_clock cmu_imem_mux_clks[] __initconst = {
+	MUX(MOUT_IMEM_ACLK_USER, "mout_imem_aclk_user",
+	    mout_imem_aclk_user_p, PLL_CON0_MUX_CLK_IMEM_ACLK_USER, 4, 1),
+	MUX(MOUT_IMEM_GIC_CA53, "mout_imem_gic_ca53",
+	    mout_imem_gic_ca53_p, MUX_CLK_IMEM_GIC_CA53, 0, 1),
+	MUX(MOUT_IMEM_GIC_CA5, "mout_imem_gic_ca5",
+	    mout_imem_gic_ca5_p, MUX_CLK_IMEM_GIC_CA5, 0, 1),
+	MUX(MOUT_IMEM_JPEG_USER, "mout_imem_jpeg_user",
+	    mout_imem_jpeg_user_p, PLL_CON0_MUX_CLK_IMEM_JPEG_USER, 4, 1),
+};
+
+static const struct samsung_cmu_info cmu_imem_info __initconst = {
+	.mux_clks		= cmu_imem_mux_clks,
+	.nr_mux_clks		= ARRAY_SIZE(cmu_imem_mux_clks),
+	.nr_clk_ids		= CMU_IMEM_NR_CLK,
+	.clk_regs		= cmu_imem_clk_regs,
+	.nr_clk_regs		= ARRAY_SIZE(cmu_imem_clk_regs),
+};
+
+static void __init artpec8_clk_cmu_imem_init(struct device_node *np)
+{
+	samsung_cmu_register_one(np, &cmu_imem_info);
+}
+
+CLK_OF_DECLARE(artpec8_clk_cmu_imem, "axis,artpec8-cmu-imem",
+	       artpec8_clk_cmu_imem_init);
-- 
2.34.1