Merge https://gitlab.denx.de/u-boot/custodians/u-boot-samsung

18 files changed, 1225 insertions, 23 deletions

diff --git a/drivers/clk/exynos/Kconfig b/drivers/clk/exynos/Kconfig
index eb0efa97d1..85ce9d6e24 100644
--- a/drivers/clk/exynos/Kconfig
+++ b/drivers/clk/exynos/Kconfig
@@ -15,4 +15,11 @@ config CLK_EXYNOS7420
 	  This enables common clock driver support for platforms based
 	  on Samsung Exynos7420 SoC.
 
+config CLK_EXYNOS850
+	bool "Clock driver for Samsung's Exynos850 SoC"
+	select CLK_CCF
+	help
+	  This enables common clock driver support for platforms based
+	  on Samsung Exynos850 SoC.
+
 endmenu
diff --git a/drivers/clk/exynos/Makefile b/drivers/clk/exynos/Makefile
index c9f29c873e..734100e2bf 100644
--- a/drivers/clk/exynos/Makefile
+++ b/drivers/clk/exynos/Makefile
@@ -1,7 +1,12 @@
 # SPDX-License-Identifier: GPL-2.0+
 #
 # Copyright (C) 2016 Samsung Electronics
-# Thomas Abraham <thomas.ab@samsung.com>
+# Copyright (C) 2023 Linaro Ltd.
+#
+# Authors:
+#   Thomas Abraham <thomas.ab@samsung.com>
+#   Sam Protsenko <semen.protsenko@linaro.org>
 
-obj-y				+= clk-pll.o
-obj-$(CONFIG_CLK_EXYNOS7420)	+= clk-exynos7420.o
+obj-$(CONFIG_$(SPL_TPL_)CLK_CCF)	+= clk.o clk-pll.o
+obj-$(CONFIG_CLK_EXYNOS7420)		+= clk-exynos7420.o
+obj-$(CONFIG_CLK_EXYNOS850)		+= clk-exynos850.o
diff --git a/drivers/clk/exynos/clk-exynos7420.c b/drivers/clk/exynos/clk-exynos7420.c
index 7d869eb02b..9caa932e12 100644
--- a/drivers/clk/exynos/clk-exynos7420.c
+++ b/drivers/clk/exynos/clk-exynos7420.c
@@ -10,8 +10,15 @@
 #include <errno.h>
 #include <clk-uclass.h>
 #include <asm/io.h>
+#include <div64.h>
 #include <dt-bindings/clock/exynos7420-clk.h>
-#include "clk-pll.h"
+
+#define PLL145X_MDIV_SHIFT	16
+#define PLL145X_MDIV_MASK	0x3ff
+#define PLL145X_PDIV_SHIFT	8
+#define PLL145X_PDIV_MASK	0x3f
+#define PLL145X_SDIV_SHIFT	0
+#define PLL145X_SDIV_MASK	0x7
 
 #define DIVIDER(reg, shift, mask)	\
 	(((readl(reg) >> shift) & mask) + 1)
@@ -64,6 +71,22 @@ struct exynos7420_clk_top0_priv {
 	unsigned long sclk_uart2;
 };
 
+static unsigned long pll145x_get_rate(unsigned int *con1,
+				      unsigned long fin_freq)
+{
+	unsigned long pll_con1 = readl(con1);
+	unsigned long mdiv, sdiv, pdiv;
+	u64 fvco = fin_freq;
+
+	mdiv = (pll_con1 >> PLL145X_MDIV_SHIFT) & PLL145X_MDIV_MASK;
+	pdiv = (pll_con1 >> PLL145X_PDIV_SHIFT) & PLL145X_PDIV_MASK;
+	sdiv = (pll_con1 >> PLL145X_SDIV_SHIFT) & PLL145X_SDIV_MASK;
+
+	fvco *= mdiv;
+	do_div(fvco, (pdiv << sdiv));
+	return (unsigned long)fvco;
+}
+
 static ulong exynos7420_topc_get_rate(struct clk *clk)
 {
 	struct exynos7420_clk_topc_priv *priv = dev_get_priv(clk->dev);
diff --git a/drivers/clk/exynos/clk-exynos850.c b/drivers/clk/exynos/clk-exynos850.c
new file mode 100644
index 0000000000..cf94a3e1b6
--- /dev/null
+++ b/drivers/clk/exynos/clk-exynos850.c
@@ -0,0 +1,189 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Samsung Exynos850 clock driver.
+ * Copyright (c) 2023 Linaro Ltd.
+ * Author: Sam Protsenko <semen.protsenko@linaro.org>
+ */
+
+#include <dm.h>
+#include <asm/io.h>
+#include <dt-bindings/clock/exynos850.h>
+#include "clk.h"
+
+/* ---- CMU_TOP ------------------------------------------------------------- */
+
+/* Register Offset definitions for CMU_TOP (0x120e0000) */
+#define PLL_CON0_PLL_MMC			0x0100
+#define PLL_CON3_PLL_MMC			0x010c
+#define PLL_CON0_PLL_SHARED0			0x0140
+#define PLL_CON3_PLL_SHARED0			0x014c
+#define PLL_CON0_PLL_SHARED1			0x0180
+#define PLL_CON3_PLL_SHARED1			0x018c
+#define CLK_CON_MUX_MUX_CLKCMU_PERI_BUS		0x1070
+#define CLK_CON_MUX_MUX_CLKCMU_PERI_IP		0x1074
+#define CLK_CON_MUX_MUX_CLKCMU_PERI_UART	0x1078
+#define CLK_CON_DIV_CLKCMU_PERI_BUS		0x187c
+#define CLK_CON_DIV_CLKCMU_PERI_IP		0x1880
+#define CLK_CON_DIV_CLKCMU_PERI_UART		0x1884
+#define CLK_CON_DIV_PLL_SHARED0_DIV2		0x188c
+#define CLK_CON_DIV_PLL_SHARED0_DIV3		0x1890
+#define CLK_CON_DIV_PLL_SHARED0_DIV4		0x1894
+#define CLK_CON_DIV_PLL_SHARED1_DIV2		0x1898
+#define CLK_CON_DIV_PLL_SHARED1_DIV3		0x189c
+#define CLK_CON_DIV_PLL_SHARED1_DIV4		0x18a0
+#define CLK_CON_GAT_GATE_CLKCMU_PERI_BUS	0x2080
+#define CLK_CON_GAT_GATE_CLKCMU_PERI_IP		0x2084
+#define CLK_CON_GAT_GATE_CLKCMU_PERI_UART	0x2088
+
+static const struct samsung_pll_clock top_pure_pll_clks[] = {
+	PLL(pll_0822x, CLK_FOUT_SHARED0_PLL, "fout_shared0_pll", "clock-oscclk",
+	    PLL_CON3_PLL_SHARED0),
+	PLL(pll_0822x, CLK_FOUT_SHARED1_PLL, "fout_shared1_pll", "clock-oscclk",
+	    PLL_CON3_PLL_SHARED1),
+	PLL(pll_0831x, CLK_FOUT_MMC_PLL, "fout_mmc_pll", "clock-oscclk",
+	    PLL_CON3_PLL_MMC),
+};
+
+/* List of parent clocks for Muxes in CMU_TOP */
+PNAME(mout_shared0_pll_p)	= { "clock-oscclk", "fout_shared0_pll" };
+PNAME(mout_shared1_pll_p)	= { "clock-oscclk", "fout_shared1_pll" };
+PNAME(mout_mmc_pll_p)		= { "clock-oscclk", "fout_mmc_pll" };
+/* List of parent clocks for Muxes in CMU_TOP: for CMU_PERI */
+PNAME(mout_peri_bus_p)		= { "dout_shared0_div4", "dout_shared1_div4" };
+PNAME(mout_peri_uart_p)		= { "clock-oscclk", "dout_shared0_div4",
+				    "dout_shared1_div4", "clock-oscclk" };
+PNAME(mout_peri_ip_p)		= { "clock-oscclk", "dout_shared0_div4",
+				    "dout_shared1_div4", "clock-oscclk" };
+
+static const struct samsung_mux_clock top_pure_mux_clks[] = {
+	MUX(CLK_MOUT_SHARED0_PLL, "mout_shared0_pll", mout_shared0_pll_p,
+	    PLL_CON0_PLL_SHARED0, 4, 1),
+	MUX(CLK_MOUT_SHARED1_PLL, "mout_shared1_pll", mout_shared1_pll_p,
+	    PLL_CON0_PLL_SHARED1, 4, 1),
+	MUX(CLK_MOUT_MMC_PLL, "mout_mmc_pll", mout_mmc_pll_p,
+	    PLL_CON0_PLL_MMC, 4, 1),
+};
+
+static const struct samsung_mux_clock top_peri_mux_clks[] = {
+	MUX(CLK_MOUT_PERI_BUS, "mout_peri_bus", mout_peri_bus_p,
+	    CLK_CON_MUX_MUX_CLKCMU_PERI_BUS, 0, 1),
+	MUX(CLK_MOUT_PERI_UART, "mout_peri_uart", mout_peri_uart_p,
+	    CLK_CON_MUX_MUX_CLKCMU_PERI_UART, 0, 2),
+	MUX(CLK_MOUT_PERI_IP, "mout_peri_ip", mout_peri_ip_p,
+	    CLK_CON_MUX_MUX_CLKCMU_PERI_IP, 0, 2),
+};
+
+static const struct samsung_div_clock top_pure_div_clks[] = {
+	DIV(CLK_DOUT_SHARED0_DIV3, "dout_shared0_div3", "mout_shared0_pll",
+	    CLK_CON_DIV_PLL_SHARED0_DIV3, 0, 2),
+	DIV(CLK_DOUT_SHARED0_DIV2, "dout_shared0_div2", "mout_shared0_pll",
+	    CLK_CON_DIV_PLL_SHARED0_DIV2, 0, 1),
+	DIV(CLK_DOUT_SHARED1_DIV3, "dout_shared1_div3", "mout_shared1_pll",
+	    CLK_CON_DIV_PLL_SHARED1_DIV3, 0, 2),
+	DIV(CLK_DOUT_SHARED1_DIV2, "dout_shared1_div2", "mout_shared1_pll",
+	    CLK_CON_DIV_PLL_SHARED1_DIV2, 0, 1),
+	DIV(CLK_DOUT_SHARED0_DIV4, "dout_shared0_div4", "dout_shared0_div2",
+	    CLK_CON_DIV_PLL_SHARED0_DIV4, 0, 1),
+	DIV(CLK_DOUT_SHARED1_DIV4, "dout_shared1_div4", "dout_shared1_div2",
+	    CLK_CON_DIV_PLL_SHARED1_DIV4, 0, 1),
+};
+
+static const struct samsung_div_clock top_peri_div_clks[] = {
+	DIV(CLK_DOUT_PERI_BUS, "dout_peri_bus", "gout_peri_bus",
+	    CLK_CON_DIV_CLKCMU_PERI_BUS, 0, 4),
+	DIV(CLK_DOUT_PERI_UART, "dout_peri_uart", "gout_peri_uart",
+	    CLK_CON_DIV_CLKCMU_PERI_UART, 0, 4),
+	DIV(CLK_DOUT_PERI_IP, "dout_peri_ip", "gout_peri_ip",
+	    CLK_CON_DIV_CLKCMU_PERI_IP, 0, 4),
+};
+
+static const struct samsung_gate_clock top_peri_gate_clks[] = {
+	GATE(CLK_GOUT_PERI_BUS, "gout_peri_bus", "mout_peri_bus",
+	     CLK_CON_GAT_GATE_CLKCMU_PERI_BUS, 21, 0, 0),
+	GATE(CLK_GOUT_PERI_UART, "gout_peri_uart", "mout_peri_uart",
+	     CLK_CON_GAT_GATE_CLKCMU_PERI_UART, 21, 0, 0),
+	GATE(CLK_GOUT_PERI_IP, "gout_peri_ip", "mout_peri_ip",
+	     CLK_CON_GAT_GATE_CLKCMU_PERI_IP, 21, 0, 0),
+};
+
+static const struct samsung_clk_group top_cmu_clks[] = {
+	/* CMU_TOP_PURECLKCOMP */
+	{ S_CLK_PLL, top_pure_pll_clks, ARRAY_SIZE(top_pure_pll_clks) },
+	{ S_CLK_MUX, top_pure_mux_clks, ARRAY_SIZE(top_pure_mux_clks) },
+	{ S_CLK_DIV, top_pure_div_clks, ARRAY_SIZE(top_pure_div_clks) },
+
+	/* CMU_TOP clocks for CMU_PERI */
+	{ S_CLK_MUX, top_peri_mux_clks, ARRAY_SIZE(top_peri_mux_clks) },
+	{ S_CLK_GATE, top_peri_gate_clks, ARRAY_SIZE(top_peri_gate_clks) },
+	{ S_CLK_DIV, top_peri_div_clks, ARRAY_SIZE(top_peri_div_clks) },
+};
+
+static int exynos850_cmu_top_probe(struct udevice *dev)
+{
+	return samsung_cmu_register_one(dev, top_cmu_clks,
+					ARRAY_SIZE(top_cmu_clks));
+}
+
+static const struct udevice_id exynos850_cmu_top_ids[] = {
+	{ .compatible = "samsung,exynos850-cmu-top" },
+	{ }
+};
+
+U_BOOT_DRIVER(exynos850_cmu_top) = {
+	.name		= "exynos850-cmu-top",
+	.id		= UCLASS_CLK,
+	.of_match	= exynos850_cmu_top_ids,
+	.ops		= &ccf_clk_ops,
+	.probe		= exynos850_cmu_top_probe,
+	.flags		= DM_FLAG_PRE_RELOC,
+};
+
+/* ---- CMU_PERI ------------------------------------------------------------ */
+
+/* Register Offset definitions for CMU_PERI (0x10030000) */
+#define PLL_CON0_MUX_CLKCMU_PERI_BUS_USER	0x0600
+#define PLL_CON0_MUX_CLKCMU_PERI_UART_USER	0x0630
+#define CLK_CON_GAT_GOUT_PERI_UART_IPCLK	0x20a8
+#define CLK_CON_GAT_GOUT_PERI_UART_PCLK		0x20ac
+
+/* List of parent clocks for Muxes in CMU_PERI */
+PNAME(mout_peri_bus_user_p)	= { "clock-oscclk", "dout_peri_bus" };
+PNAME(mout_peri_uart_user_p)	= { "clock-oscclk", "dout_peri_uart" };
+
+static const struct samsung_mux_clock peri_mux_clks[] = {
+	MUX(CLK_MOUT_PERI_BUS_USER, "mout_peri_bus_user", mout_peri_bus_user_p,
+	    PLL_CON0_MUX_CLKCMU_PERI_BUS_USER, 4, 1),
+	MUX(CLK_MOUT_PERI_UART_USER, "mout_peri_uart_user",
+	    mout_peri_uart_user_p, PLL_CON0_MUX_CLKCMU_PERI_UART_USER, 4, 1),
+};
+
+static const struct samsung_gate_clock peri_gate_clks[] = {
+	GATE(CLK_GOUT_UART_IPCLK, "gout_uart_ipclk", "mout_peri_uart_user",
+	     CLK_CON_GAT_GOUT_PERI_UART_IPCLK, 21, 0, 0),
+	GATE(CLK_GOUT_UART_PCLK, "gout_uart_pclk", "mout_peri_bus_user",
+	     CLK_CON_GAT_GOUT_PERI_UART_PCLK, 21, 0, 0),
+};
+
+static const struct samsung_clk_group peri_cmu_clks[] = {
+	{ S_CLK_MUX, peri_mux_clks, ARRAY_SIZE(peri_mux_clks) },
+	{ S_CLK_GATE, peri_gate_clks, ARRAY_SIZE(peri_gate_clks) },
+};
+
+static int exynos850_cmu_peri_probe(struct udevice *dev)
+{
+	return samsung_register_cmu(dev, peri_cmu_clks, exynos850_cmu_top);
+}
+
+static const struct udevice_id exynos850_cmu_peri_ids[] = {
+	{ .compatible = "samsung,exynos850-cmu-peri" },
+	{ }
+};
+
+U_BOOT_DRIVER(exynos850_cmu_peri) = {
+	.name		= "exynos850-cmu-peri",
+	.id		= UCLASS_CLK,
+	.of_match	= exynos850_cmu_peri_ids,
+	.ops		= &ccf_clk_ops,
+	.probe		= exynos850_cmu_peri_probe,
+	.flags		= DM_FLAG_PRE_RELOC,
+};
diff --git a/drivers/clk/exynos/clk-pll.c b/drivers/clk/exynos/clk-pll.c
index 407fc71d41..4aacbc26b2 100644
--- a/drivers/clk/exynos/clk-pll.c
+++ b/drivers/clk/exynos/clk-pll.c
@@ -1,32 +1,167 @@
 // SPDX-License-Identifier: GPL-2.0+
 /*
- * Exynos PLL helper functions for clock drivers.
  * Copyright (C) 2016 Samsung Electronics
- * Thomas Abraham <thomas.ab@samsung.com>
+ * Copyright (C) 2023 Linaro Ltd.
+ *
+ * Authors:
+ *   Thomas Abraham <thomas.ab@samsung.com>
+ *   Sam Protsenko <semen.protsenko@linaro.org>
+ *
+ * This file contains the utility functions to register the pll clocks.
  */
 
-#include <common.h>
 #include <asm/io.h>
 #include <div64.h>
+#include <malloc.h>
+#include <clk-uclass.h>
+#include <dm/device.h>
+#include <clk.h>
+#include "clk.h"
 
-#define PLL145X_MDIV_SHIFT	16
-#define PLL145X_MDIV_MASK	0x3ff
-#define PLL145X_PDIV_SHIFT	8
-#define PLL145X_PDIV_MASK	0x3f
-#define PLL145X_SDIV_SHIFT	0
-#define PLL145X_SDIV_MASK	0x7
+#define UBOOT_DM_CLK_SAMSUNG_PLL0822X	"samsung_clk_pll0822x"
+#define UBOOT_DM_CLK_SAMSUNG_PLL0831X	"samsung_clk_pll0831x"
 
-unsigned long pll145x_get_rate(unsigned int *con1, unsigned long fin_freq)
+struct samsung_clk_pll {
+	struct clk		clk;
+	void __iomem		*con_reg;
+	enum samsung_pll_type	type;
+};
+
+#define to_clk_pll(_clk) container_of(_clk, struct samsung_clk_pll, clk)
+
+/*
+ * PLL0822x Clock Type
+ */
+
+#define PLL0822X_MDIV_MASK		0x3ff
+#define PLL0822X_PDIV_MASK		0x3f
+#define PLL0822X_SDIV_MASK		0x7
+#define PLL0822X_MDIV_SHIFT		16
+#define PLL0822X_PDIV_SHIFT		8
+#define PLL0822X_SDIV_SHIFT		0
+
+static unsigned long samsung_pll0822x_recalc_rate(struct clk *clk)
 {
-	unsigned long pll_con1 = readl(con1);
-	unsigned long mdiv, sdiv, pdiv;
-	uint64_t fvco = fin_freq;
+	struct samsung_clk_pll *pll = to_clk_pll(clk);
+	u32 mdiv, pdiv, sdiv, pll_con3;
+	u64 fvco = clk_get_parent_rate(clk);
 
-	mdiv = (pll_con1 >> PLL145X_MDIV_SHIFT) & PLL145X_MDIV_MASK;
-	pdiv = (pll_con1 >> PLL145X_PDIV_SHIFT) & PLL145X_PDIV_MASK;
-	sdiv = (pll_con1 >> PLL145X_SDIV_SHIFT) & PLL145X_SDIV_MASK;
+	pll_con3 = readl_relaxed(pll->con_reg);
+	mdiv = (pll_con3 >> PLL0822X_MDIV_SHIFT) & PLL0822X_MDIV_MASK;
+	pdiv = (pll_con3 >> PLL0822X_PDIV_SHIFT) & PLL0822X_PDIV_MASK;
+	sdiv = (pll_con3 >> PLL0822X_SDIV_SHIFT) & PLL0822X_SDIV_MASK;
 
 	fvco *= mdiv;
 	do_div(fvco, (pdiv << sdiv));
 	return (unsigned long)fvco;
 }
+
+static const struct clk_ops samsung_pll0822x_clk_min_ops = {
+	.get_rate = samsung_pll0822x_recalc_rate,
+};
+
+/*
+ * PLL0831x Clock Type
+ */
+
+#define PLL0831X_KDIV_MASK		0xffff
+#define PLL0831X_MDIV_MASK		0x1ff
+#define PLL0831X_PDIV_MASK		0x3f
+#define PLL0831X_SDIV_MASK		0x7
+#define PLL0831X_MDIV_SHIFT		16
+#define PLL0831X_PDIV_SHIFT		8
+#define PLL0831X_SDIV_SHIFT		0
+#define PLL0831X_KDIV_SHIFT		0
+
+static unsigned long samsung_pll0831x_recalc_rate(struct clk *clk)
+{
+	struct samsung_clk_pll *pll = to_clk_pll(clk);
+	u32 mdiv, pdiv, sdiv, pll_con3, pll_con5;
+	s16 kdiv;
+	u64 fvco = clk_get_parent_rate(clk);
+
+	pll_con3 = readl_relaxed(pll->con_reg);
+	pll_con5 = readl_relaxed(pll->con_reg + 8);
+	mdiv = (pll_con3 >> PLL0831X_MDIV_SHIFT) & PLL0831X_MDIV_MASK;
+	pdiv = (pll_con3 >> PLL0831X_PDIV_SHIFT) & PLL0831X_PDIV_MASK;
+	sdiv = (pll_con3 >> PLL0831X_SDIV_SHIFT) & PLL0831X_SDIV_MASK;
+	kdiv = (s16)((pll_con5 >> PLL0831X_KDIV_SHIFT) & PLL0831X_KDIV_MASK);
+
+	fvco *= (mdiv << 16) + kdiv;
+	do_div(fvco, (pdiv << sdiv));
+	fvco >>= 16;
+
+	return (unsigned long)fvco;
+}
+
+static const struct clk_ops samsung_pll0831x_clk_min_ops = {
+	.get_rate = samsung_pll0831x_recalc_rate,
+};
+
+static struct clk *_samsung_clk_register_pll(void __iomem *base,
+					const struct samsung_pll_clock *pll_clk)
+{
+	struct samsung_clk_pll *pll;
+	struct clk *clk;
+	const char *drv_name;
+	int ret;
+
+	pll = kzalloc(sizeof(*pll), GFP_KERNEL);
+	if (!pll)
+		return ERR_PTR(-ENOMEM);
+
+	pll->con_reg = base + pll_clk->con_offset;
+	pll->type = pll_clk->type;
+	clk = &pll->clk;
+	clk->flags = pll_clk->flags;
+
+	switch (pll_clk->type) {
+	case pll_0822x:
+		drv_name = UBOOT_DM_CLK_SAMSUNG_PLL0822X;
+		break;
+	case pll_0831x:
+		drv_name = UBOOT_DM_CLK_SAMSUNG_PLL0831X;
+		break;
+	default:
+		kfree(pll);
+		return ERR_PTR(-ENODEV);
+	}
+
+	ret = clk_register(clk, drv_name, pll_clk->name, pll_clk->parent_name);
+	if (ret) {
+		kfree(pll);
+		return ERR_PTR(ret);
+	}
+
+	return clk;
+}
+
+void samsung_clk_register_pll(void __iomem *base,
+			      const struct samsung_pll_clock *clk_list,
+			      unsigned int nr_clk)
+{
+	unsigned int cnt;
+
+	for (cnt = 0; cnt < nr_clk; cnt++) {
+		struct clk *clk;
+		const struct samsung_pll_clock *pll_clk;
+
+		pll_clk = &clk_list[cnt];
+		clk = _samsung_clk_register_pll(base, pll_clk);
+		clk_dm(pll_clk->id, clk);
+	}
+}
+
+U_BOOT_DRIVER(samsung_pll0822x_clk) = {
+	.name	= UBOOT_DM_CLK_SAMSUNG_PLL0822X,
+	.id	= UCLASS_CLK,
+	.ops	= &samsung_pll0822x_clk_min_ops,
+	.flags	= DM_FLAG_PRE_RELOC,
+};
+
+U_BOOT_DRIVER(samsung_pll0831x_clk) = {
+	.name	= UBOOT_DM_CLK_SAMSUNG_PLL0831X,
+	.id	= UCLASS_CLK,
+	.ops	= &samsung_pll0831x_clk_min_ops,
+	.flags	= DM_FLAG_PRE_RELOC,
+};
diff --git a/drivers/clk/exynos/clk-pll.h b/drivers/clk/exynos/clk-pll.h
index 7b7af5e676..bd79309fa1 100644
--- a/drivers/clk/exynos/clk-pll.h
+++ b/drivers/clk/exynos/clk-pll.h
@@ -1,13 +1,23 @@
 /* SPDX-License-Identifier: GPL-2.0+ */
 /*
- * Exynos PLL helper functions for clock drivers.
  * Copyright (C) 2016 Samsung Electronics
- * Thomas Abraham <thomas.ab@samsung.com>
+ * Copyright (C) 2023 Linaro Ltd.
+ *
+ * Authors:
+ *   Thomas Abraham <thomas.ab@samsung.com>
+ *   Sam Protsenko <semen.protsenko@linaro.org>
+ *
+ * Common Clock Framework support for all PLL's in Samsung platforms.
  */
 
 #ifndef __EXYNOS_CLK_PLL_H
 #define __EXYNOS_CLK_PLL_H
 
-unsigned long pll145x_get_rate(unsigned int *con1, unsigned long fin_freq);
+#include <linux/clk-provider.h>
+
+enum samsung_pll_type {
+	pll_0822x,
+	pll_0831x,
+};
 
 #endif /* __EXYNOS_CLK_PLL_H */
diff --git a/drivers/clk/exynos/clk.c b/drivers/clk/exynos/clk.c
new file mode 100644
index 0000000000..430767f072
--- /dev/null
+++ b/drivers/clk/exynos/clk.c
@@ -0,0 +1,121 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2023 Linaro Ltd.
+ * Sam Protsenko <semen.protsenko@linaro.org>
+ *
+ * This file includes utility functions to register clocks to common
+ * clock framework for Samsung platforms.
+ */
+
+#include <dm.h>
+#include "clk.h"
+
+void samsung_clk_register_mux(void __iomem *base,
+			      const struct samsung_mux_clock *clk_list,
+			      unsigned int nr_clk)
+{
+	unsigned int cnt;
+
+	for (cnt = 0; cnt < nr_clk; cnt++) {
+		struct clk *clk;
+		const struct samsung_mux_clock *m;
+
+		m = &clk_list[cnt];
+		clk = clk_register_mux(NULL, m->name, m->parent_names,
+			m->num_parents, m->flags, base + m->offset, m->shift,
+			m->width, m->mux_flags);
+		clk_dm(m->id, clk);
+	}
+}
+
+void samsung_clk_register_div(void __iomem *base,
+			      const struct samsung_div_clock *clk_list,
+			      unsigned int nr_clk)
+{
+	unsigned int cnt;
+
+	for (cnt = 0; cnt < nr_clk; cnt++) {
+		struct clk *clk;
+		const struct samsung_div_clock *d;
+
+		d = &clk_list[cnt];
+		clk = clk_register_divider(NULL, d->name, d->parent_name,
+			d->flags, base + d->offset, d->shift,
+			d->width, d->div_flags);
+		clk_dm(d->id, clk);
+	}
+}
+
+void samsung_clk_register_gate(void __iomem *base,
+			       const struct samsung_gate_clock *clk_list,
+			       unsigned int nr_clk)
+{
+	unsigned int cnt;
+
+	for (cnt = 0; cnt < nr_clk; cnt++) {
+		struct clk *clk;
+		const struct samsung_gate_clock *g;
+
+		g = &clk_list[cnt];
+		clk = clk_register_gate(NULL, g->name, g->parent_name,
+			g->flags, base + g->offset, g->bit_idx,
+			g->gate_flags, NULL);
+		clk_dm(g->id, clk);
+	}
+}
+
+typedef void (*samsung_clk_register_fn)(void __iomem *base,
+					const void *clk_list,
+					unsigned int nr_clk);
+
+static const samsung_clk_register_fn samsung_clk_register_fns[] = {
+	[S_CLK_MUX]	= (samsung_clk_register_fn)samsung_clk_register_mux,
+	[S_CLK_DIV]	= (samsung_clk_register_fn)samsung_clk_register_div,
+	[S_CLK_GATE]	= (samsung_clk_register_fn)samsung_clk_register_gate,
+	[S_CLK_PLL]	= (samsung_clk_register_fn)samsung_clk_register_pll,
+};
+
+/**
+ * samsung_cmu_register_clocks() - Register provided clock groups
+ * @base: Base address of CMU registers
+ * @clk_groups: list of clock groups
+ * @nr_groups: count of clock groups in @clk_groups
+ *
+ * Having the array of clock groups @clk_groups makes it possible to keep a
+ * correct clocks registration order.
+ */
+void samsung_cmu_register_clocks(void __iomem *base,
+				 const struct samsung_clk_group *clk_groups,
+				 unsigned int nr_groups)
+{
+	unsigned int i;
+
+	for (i = 0; i < nr_groups; i++) {
+		const struct samsung_clk_group *g = &clk_groups[i];
+
+		samsung_clk_register_fns[g->type](base, g->clk_list, g->nr_clk);
+	}
+}
+
+/**
+ * samsung_cmu_register_one - Register all CMU clocks
+ * @dev: CMU device
+ * @clk_groups: list of CMU clock groups
+ * @nr_groups: count of CMU clock groups in @clk_groups
+ *
+ * Return: 0 on success or negative value on error.
+ */
+int samsung_cmu_register_one(struct udevice *dev,
+			     const struct samsung_clk_group *clk_groups,
+			     unsigned int nr_groups)
+{
+	void __iomem *base;
+
+	base = dev_read_addr_ptr(dev);
+	if (!base)
+		return -EINVAL;
+
+	samsung_cmu_register_clocks(base, clk_groups, nr_groups);
+
+	return 0;
+}
diff --git a/drivers/clk/exynos/clk.h b/drivers/clk/exynos/clk.h
new file mode 100644
index 0000000000..91a51b877a
--- /dev/null
+++ b/drivers/clk/exynos/clk.h
@@ -0,0 +1,228 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (c) 2023 Linaro Ltd.
+ * Sam Protsenko <semen.protsenko@linaro.org>
+ *
+ * Common Clock Framework support for all Samsung platforms.
+ */
+
+#ifndef __EXYNOS_CLK_H
+#define __EXYNOS_CLK_H
+
+#include <errno.h>
+#include <linux/clk-provider.h>
+#include "clk-pll.h"
+
+/**
+ * struct samsung_mux_clock - information about mux clock
+ * @id: platform specific id of the clock
+ * @name: name of this mux clock
+ * @parent_names: array of pointer to parent clock names
+ * @num_parents: number of parents listed in @parent_names
+ * @flags: optional flags for basic clock
+ * @offset: offset of the register for configuring the mux
+ * @shift: starting bit location of the mux control bit-field in @reg
+ * @width: width of the mux control bit-field in @reg
+ * @mux_flags: flags for mux-type clock
+ */
+struct samsung_mux_clock {
+	unsigned int		id;
+	const char		*name;
+	const char		* const *parent_names;
+	u8			num_parents;
+	unsigned long		flags;
+	unsigned long		offset;
+	u8			shift;
+	u8			width;
+	u8			mux_flags;
+};
+
+#define PNAME(x) static const char * const x[]
+
+#define __MUX(_id, cname, pnames, o, s, w, f, mf)			\
+	{								\
+		.id		= _id,					\
+		.name		= cname,				\
+		.parent_names	= pnames,				\
+		.num_parents	= ARRAY_SIZE(pnames),			\
+		.flags		= (f) | CLK_SET_RATE_NO_REPARENT,	\
+		.offset		= o,					\
+		.shift		= s,					\
+		.width		= w,					\
+		.mux_flags	= mf,					\
+	}
+
+#define MUX(_id, cname, pnames, o, s, w)				\
+	__MUX(_id, cname, pnames, o, s, w, 0, 0)
+
+#define MUX_F(_id, cname, pnames, o, s, w, f, mf)			\
+	__MUX(_id, cname, pnames, o, s, w, f, mf)
+
+/**
+ * struct samsung_div_clock - information about div clock
+ * @id: platform specific id of the clock
+ * @name: name of this div clock
+ * @parent_name: name of the parent clock
+ * @flags: optional flags for basic clock
+ * @offset: offset of the register for configuring the div
+ * @shift: starting bit location of the div control bit-field in @reg
+ * @width: width of the bitfield
+ * @div_flags: flags for div-type clock
+ */
+struct samsung_div_clock {
+	unsigned int		id;
+	const char		*name;
+	const char		*parent_name;
+	unsigned long		flags;
+	unsigned long		offset;
+	u8			shift;
+	u8			width;
+	u8			div_flags;
+};
+
+#define __DIV(_id, cname, pname, o, s, w, f, df)	\
+	{						\
+		.id		= _id,			\
+		.name		= cname,		\
+		.parent_name	= pname,		\
+		.flags		= f,			\
+		.offset		= o,			\
+		.shift		= s,			\
+		.width		= w,			\
+		.div_flags	= df,			\
+	}
+
+#define DIV(_id, cname, pname, o, s, w)			\
+	__DIV(_id, cname, pname, o, s, w, 0, 0)
+
+#define DIV_F(_id, cname, pname, o, s, w, f, df)	\
+	__DIV(_id, cname, pname, o, s, w, f, df)
+
+/**
+ * struct samsung_gate_clock - information about gate clock
+ * @id: platform specific id of the clock
+ * @name: name of this gate clock
+ * @parent_name: name of the parent clock
+ * @flags: optional flags for basic clock
+ * @offset: offset of the register for configuring the gate
+ * @bit_idx: bit index of the gate control bit-field in @reg
+ * @gate_flags: flags for gate-type clock
+ */
+struct samsung_gate_clock {
+	unsigned int		id;
+	const char		*name;
+	const char		*parent_name;
+	unsigned long		flags;
+	unsigned long		offset;
+	u8			bit_idx;
+	u8			gate_flags;
+};
+
+#define __GATE(_id, cname, pname, o, b, f, gf)			\
+	{							\
+		.id		= _id,				\
+		.name		= cname,			\
+		.parent_name	= pname,			\
+		.flags		= f,				\
+		.offset		= o,				\
+		.bit_idx	= b,				\
+		.gate_flags	= gf,				\
+	}
+
+#define GATE(_id, cname, pname, o, b, f, gf)			\
+	__GATE(_id, cname, pname, o, b, f, gf)
+
+/**
+ * struct samsung_pll_clock - information about pll clock
+ * @id: platform specific id of the clock
+ * @name: name of this pll clock
+ * @parent_name: name of the parent clock
+ * @flags: optional flags for basic clock
+ * @con_offset: offset of the register for configuring the PLL
+ * @type: type of PLL to be registered
+ */
+struct samsung_pll_clock {
+	unsigned int		id;
+	const char		*name;
+	const char		*parent_name;
+	unsigned long		flags;
+	int			con_offset;
+	enum samsung_pll_type	type;
+};
+
+#define PLL(_typ, _id, _name, _pname, _con)		\
+	{						\
+		.id		= _id,			\
+		.name		= _name,		\
+		.parent_name	= _pname,		\
+		.flags		= CLK_GET_RATE_NOCACHE,	\
+		.con_offset	= _con,			\
+		.type		= _typ,			\
+	}
+
+enum samsung_clock_type {
+	S_CLK_MUX,
+	S_CLK_DIV,
+	S_CLK_GATE,
+	S_CLK_PLL,
+};
+
+/**
+ * struct samsung_clock_group - contains a list of clocks of one type
+ * @type: type of clocks this structure contains
+ * @clk_list: list of clocks
+ * @nr_clk: count of clocks in @clk_list
+ */
+struct samsung_clk_group {
+	enum samsung_clock_type type;
+	const void *clk_list;
+	unsigned int nr_clk;
+};
+
+void samsung_clk_register_mux(void __iomem *base,
+			      const struct samsung_mux_clock *clk_list,
+			      unsigned int nr_clk);
+void samsung_clk_register_div(void __iomem *base,
+			      const struct samsung_div_clock *clk_list,
+			      unsigned int nr_clk);
+void samsung_clk_register_gate(void __iomem *base,
+			       const struct samsung_gate_clock *clk_list,
+			       unsigned int nr_clk);
+void samsung_clk_register_pll(void __iomem *base,
+			      const struct samsung_pll_clock *clk_list,
+			      unsigned int nr_clk);
+
+void samsung_cmu_register_clocks(void __iomem *base,
+				 const struct samsung_clk_group *clk_groups,
+				 unsigned int nr_groups);
+int samsung_cmu_register_one(struct udevice *dev,
+			     const struct samsung_clk_group *clk_groups,
+			     unsigned int nr_groups);
+
+/**
+ * samsung_register_cmu - Register CMU clocks ensuring parent CMU is present
+ * @dev: CMU device
+ * @clk_groups: list of CMU clock groups
+ * @parent_drv: name of parent CMU driver
+ *
+ * Register provided CMU clocks, but make sure CMU_TOP driver is instantiated
+ * first.
+ *
+ * Return: 0 on success or negative value on error.
+ */
+#define samsung_register_cmu(dev, clk_groups, parent_drv)		\
+({									\
+	struct udevice *__parent;					\
+	int __ret;							\
+									\
+	__ret = uclass_get_device_by_driver(UCLASS_CLK,			\
+		DM_DRIVER_GET(parent_drv), &__parent);			\
+	if (__ret || !__parent)						\
+		__ret = -ENOENT;					\
+	else								\
+		__ret = samsung_cmu_register_one(dev, clk_groups,	\
+			ARRAY_SIZE(clk_groups));			\
+	__ret;								\
+})
+
+#endif /* __EXYNOS_CLK_H */
diff --git a/drivers/pinctrl/exynos/Kconfig b/drivers/pinctrl/exynos/Kconfig
index a60f49869b..1b7fb62bc4 100644
--- a/drivers/pinctrl/exynos/Kconfig
+++ b/drivers/pinctrl/exynos/Kconfig
@@ -16,3 +16,11 @@ config PINCTRL_EXYNOS78x0
 	help
 	  Support pin multiplexing and pin configuration control on
 	  Samsung's Exynos78x0 SoC.
+
+config PINCTRL_EXYNOS850
+	bool "Samsung Exynos850 pinctrl driver"
+	depends on ARCH_EXYNOS && PINCTRL_FULL
+	select PINCTRL_EXYNOS
+	help
+	  Support pin multiplexing and pin configuration control on
+	  Samsung's Exynos850 SoC.
diff --git a/drivers/pinctrl/exynos/Makefile b/drivers/pinctrl/exynos/Makefile
index 07db970ca9..3abe1226eb 100644
--- a/drivers/pinctrl/exynos/Makefile
+++ b/drivers/pinctrl/exynos/Makefile
@@ -6,3 +6,4 @@
 obj-$(CONFIG_PINCTRL_EXYNOS)		+= pinctrl-exynos.o
 obj-$(CONFIG_PINCTRL_EXYNOS7420)	+= pinctrl-exynos7420.o
 obj-$(CONFIG_PINCTRL_EXYNOS78x0)	+= pinctrl-exynos78x0.o
+obj-$(CONFIG_PINCTRL_EXYNOS850)		+= pinctrl-exynos850.o
diff --git a/drivers/pinctrl/exynos/pinctrl-exynos850.c b/drivers/pinctrl/exynos/pinctrl-exynos850.c
new file mode 100644
index 0000000000..3ec2636e0d
--- /dev/null
+++ b/drivers/pinctrl/exynos/pinctrl-exynos850.c
@@ -0,0 +1,125 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2023 Linaro Ltd.
+ * Author: Sam Protsenko <semen.protsenko@linaro.org>
+ *
+ * Exynos850 pinctrl driver.
+ */
+
+#include <dm.h>
+#include <dm/pinctrl.h>
+#include "pinctrl-exynos.h"
+
+#define EXYNOS850_PIN_BANK(pins, reg, id)		\
+	{						\
+		.type		= &exynos850_bank_type,	\
+		.offset		= reg,			\
+		.nr_pins	= pins,			\
+		.name		= id			\
+	}
+
+/* CON, DAT, PUD, DRV */
+static const struct samsung_pin_bank_type exynos850_bank_type = {
+	.fld_width = { 4, 1, 4, 4, },
+	.reg_offset = { 0x00, 0x04, 0x08, 0x0c, },
+};
+
+static const struct pinctrl_ops exynos850_pinctrl_ops = {
+	.set_state = exynos_pinctrl_set_state
+};
+
+/* pin banks of exynos850 pin-controller 0 (ALIVE) */
+static const struct samsung_pin_bank_data exynos850_pin_banks0[] = {
+	EXYNOS850_PIN_BANK(8, 0x000, "gpa0"),
+	EXYNOS850_PIN_BANK(8, 0x020, "gpa1"),
+	EXYNOS850_PIN_BANK(8, 0x040, "gpa2"),
+	EXYNOS850_PIN_BANK(8, 0x060, "gpa3"),
+	EXYNOS850_PIN_BANK(4, 0x080, "gpa4"),
+	EXYNOS850_PIN_BANK(3, 0x0a0, "gpq0"),
+};
+
+/* pin banks of exynos850 pin-controller 1 (CMGP) */
+static const struct samsung_pin_bank_data exynos850_pin_banks1[] = {
+	EXYNOS850_PIN_BANK(1, 0x000, "gpm0"),
+	EXYNOS850_PIN_BANK(1, 0x020, "gpm1"),
+	EXYNOS850_PIN_BANK(1, 0x040, "gpm2"),
+	EXYNOS850_PIN_BANK(1, 0x060, "gpm3"),
+	EXYNOS850_PIN_BANK(1, 0x080, "gpm4"),
+	EXYNOS850_PIN_BANK(1, 0x0a0, "gpm5"),
+	EXYNOS850_PIN_BANK(1, 0x0c0, "gpm6"),
+	EXYNOS850_PIN_BANK(1, 0x0e0, "gpm7"),
+};
+
+/* pin banks of exynos850 pin-controller 2 (AUD) */
+static const struct samsung_pin_bank_data exynos850_pin_banks2[] = {
+	EXYNOS850_PIN_BANK(5, 0x000, "gpb0"),
+	EXYNOS850_PIN_BANK(5, 0x020, "gpb1"),
+};
+
+/* pin banks of exynos850 pin-controller 3 (HSI) */
+static const struct samsung_pin_bank_data exynos850_pin_banks3[] = {
+	EXYNOS850_PIN_BANK(6, 0x000, "gpf2"),
+};
+
+/* pin banks of exynos850 pin-controller 4 (CORE) */
+static const struct samsung_pin_bank_data exynos850_pin_banks4[] = {
+	EXYNOS850_PIN_BANK(4, 0x000, "gpf0"),
+	EXYNOS850_PIN_BANK(8, 0x020, "gpf1"),
+};
+
+/* pin banks of exynos850 pin-controller 5 (PERI) */
+static const struct samsung_pin_bank_data exynos850_pin_banks5[] = {
+	EXYNOS850_PIN_BANK(2, 0x000, "gpg0"),
+	EXYNOS850_PIN_BANK(6, 0x020, "gpp0"),
+	EXYNOS850_PIN_BANK(4, 0x040, "gpp1"),
+	EXYNOS850_PIN_BANK(4, 0x060, "gpp2"),
+	EXYNOS850_PIN_BANK(8, 0x080, "gpg1"),
+	EXYNOS850_PIN_BANK(8, 0x0a0, "gpg2"),
+	EXYNOS850_PIN_BANK(1, 0x0c0, "gpg3"),
+	EXYNOS850_PIN_BANK(3, 0x0e0, "gpc0"),
+	EXYNOS850_PIN_BANK(6, 0x100, "gpc1"),
+};
+
+static const struct samsung_pin_ctrl exynos850_pin_ctrl[] = {
+	{
+		/* pin-controller instance 0 ALIVE data */
+		.pin_banks	= exynos850_pin_banks0,
+		.nr_banks	= ARRAY_SIZE(exynos850_pin_banks0),
+	}, {
+		/* pin-controller instance 1 CMGP data */
+		.pin_banks	= exynos850_pin_banks1,
+		.nr_banks	= ARRAY_SIZE(exynos850_pin_banks1),
+	}, {
+		/* pin-controller instance 2 AUD data */
+		.pin_banks	= exynos850_pin_banks2,
+		.nr_banks	= ARRAY_SIZE(exynos850_pin_banks2),
+	}, {
+		/* pin-controller instance 3 HSI data */
+		.pin_banks	= exynos850_pin_banks3,
+		.nr_banks	= ARRAY_SIZE(exynos850_pin_banks3),
+	}, {
+		/* pin-controller instance 4 CORE data */
+		.pin_banks	= exynos850_pin_banks4,
+		.nr_banks	= ARRAY_SIZE(exynos850_pin_banks4),
+	}, {
+		/* pin-controller instance 5 PERI data */
+		.pin_banks	= exynos850_pin_banks5,
+		.nr_banks	= ARRAY_SIZE(exynos850_pin_banks5),
+	},
+	{/* list terminator */}
+};
+
+static const struct udevice_id exynos850_pinctrl_ids[] = {
+	{ .compatible = "samsung,exynos850-pinctrl",
+		.data = (ulong)exynos850_pin_ctrl },
+	{ }
+};
+
+U_BOOT_DRIVER(pinctrl_exynos850) = {
+	.name		= "pinctrl_exynos850",
+	.id		= UCLASS_PINCTRL,
+	.of_match	= exynos850_pinctrl_ids,
+	.priv_auto	= sizeof(struct exynos_pinctrl_priv),
+	.ops		= &exynos850_pinctrl_ops,
+	.probe		= exynos_pinctrl_probe,
+};
diff --git a/drivers/serial/serial_s5p.c b/drivers/serial/serial_s5p.c
index 7d04dcff54..801b7645af 100644
--- a/drivers/serial/serial_s5p.c
+++ b/drivers/serial/serial_s5p.c
@@ -257,6 +257,7 @@ static const struct dm_serial_ops s5p_serial_ops = {
 
 static const struct udevice_id s5p_serial_ids[] = {
 	{ .compatible = "samsung,exynos4210-uart",	.data = PORT_S5P },
+	{ .compatible = "samsung,exynos850-uart",	.data = PORT_S5P },
 	{ .compatible = "apple,s5l-uart",		.data = PORT_S5L },
 	{ }
 };
diff --git a/drivers/soc/Kconfig b/drivers/soc/Kconfig
index 85dac9de78..03433bc0e6 100644
--- a/drivers/soc/Kconfig
+++ b/drivers/soc/Kconfig
@@ -40,6 +40,7 @@ config SOC_XILINX_VERSAL_NET
 	  This allows other drivers to verify the SoC familiy & revision using
 	  matching SoC attributes.
 
+source "drivers/soc/samsung/Kconfig"
 source "drivers/soc/ti/Kconfig"
 
 endmenu
diff --git a/drivers/soc/Makefile b/drivers/soc/Makefile
index 84385650d4..610bf816d4 100644
--- a/drivers/soc/Makefile
+++ b/drivers/soc/Makefile
@@ -2,6 +2,7 @@
 #
 # Makefile for the U-Boot SOC specific device drivers.
 
+obj-$(CONFIG_SOC_SAMSUNG) += samsung/
 obj-$(CONFIG_SOC_TI) += ti/
 obj-$(CONFIG_SOC_DEVICE) += soc-uclass.o
 obj-$(CONFIG_SOC_DEVICE_TI_K3) += soc_ti_k3.o
diff --git a/drivers/soc/samsung/Kconfig b/drivers/soc/samsung/Kconfig
new file mode 100644
index 0000000000..737b7ca8cd
--- /dev/null
+++ b/drivers/soc/samsung/Kconfig
@@ -0,0 +1,33 @@
+# SPDX-License-Identifier: GPL-2.0+
+
+menuconfig SOC_SAMSUNG
+	bool "Samsung SoC drivers support"
+
+if SOC_SAMSUNG
+
+config EXYNOS_PMU
+	bool "Exynos PMU controller driver"
+	depends on ARCH_EXYNOS
+	select REGMAP
+	select SYSCON
+	help
+	  Enable support for system controller configuration driver. It allows
+	  one to configure system controller registers (e.g. some register in
+	  PMU syscon) by providing register's offset, mask and value.
+
+config EXYNOS_USI
+	bool "Exynos USI (Universal Serial Interface) driver"
+	depends on ARCH_EXYNOS
+	select MISC
+	select REGMAP
+	select SYSCON
+	help
+	  Enable support for USI block. USI (Universal Serial Interface) is an
+	  IP-core found in modern Samsung Exynos SoCs, like Exynos850 and
+	  ExynosAutoV9. USI block can be configured to provide one of the
+	  following serial protocols: UART, SPI or High Speed I2C.
+
+	  This driver allows one to configure USI for desired protocol, which
+	  is usually done in USI node in Device Tree.
+
+endif
diff --git a/drivers/soc/samsung/Makefile b/drivers/soc/samsung/Makefile
new file mode 100644
index 0000000000..0eb3ed8353
--- /dev/null
+++ b/drivers/soc/samsung/Makefile
@@ -0,0 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0+
+
+obj-$(CONFIG_EXYNOS_PMU)	+= exynos-pmu.o
+obj-$(CONFIG_EXYNOS_USI)	+= exynos-usi.o
diff --git a/drivers/soc/samsung/exynos-pmu.c b/drivers/soc/samsung/exynos-pmu.c
new file mode 100644
index 0000000000..233ad4a908
--- /dev/null
+++ b/drivers/soc/samsung/exynos-pmu.c
@@ -0,0 +1,102 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2023 Linaro Ltd.
+ * Author: Sam Protsenko <semen.protsenko@linaro.org>
+ *
+ * Exynos PMU (Power Management Unit) driver.
+ */
+
+#include <dm.h>
+#include <errno.h>
+#include <regmap.h>
+#include <syscon.h>
+#include <linux/bitops.h>
+#include <linux/err.h>
+
+#define EXYNOS850_UART_IO_SHARE_CTRL	0x0760
+#define SEL_RXD_AP_UART_SHIFT		16
+#define SEL_RXD_AP_UART_MASK		GENMASK(17, 16)
+#define SEL_TXD_GPIO_1_SHIFT		20
+#define SEL_TXD_GPIO_1_MASK		GENMASK(21, 20)
+#define RXD_GPIO_1			0x3
+#define TXD_AP_UART			0x0
+
+struct exynos_pmu {
+	struct udevice *dev;
+	const struct exynos_pmu_data *pmu_data;
+	struct regmap *regmap;
+};
+
+struct exynos_pmu_data {
+	int (*pmu_init)(struct exynos_pmu *priv);
+};
+
+static int exynos850_pmu_init(struct exynos_pmu *priv)
+{
+	ofnode node;
+	bool uart_debug_1;
+	unsigned int offset, mask, value;
+
+	node = dev_ofnode(priv->dev);
+	uart_debug_1 = ofnode_read_bool(node, "samsung,uart-debug-1");
+	if (!uart_debug_1)
+		return 0;
+
+	/*
+	 * If uart1_pins are used for serial, AP UART lines have to be muxed
+	 * in PMU block to UART_DEBUG_1 path (GPIO_1). By default (reset value)
+	 * UART_DEBUG_0 path (uart0_pins) is connected to AP UART lines.
+	 */
+	offset = EXYNOS850_UART_IO_SHARE_CTRL;
+	mask = SEL_RXD_AP_UART_MASK | SEL_TXD_GPIO_1_MASK;
+	value = RXD_GPIO_1 << SEL_RXD_AP_UART_SHIFT |
+		TXD_AP_UART << SEL_TXD_GPIO_1_SHIFT;
+	return regmap_update_bits(priv->regmap, offset, mask, value);
+}
+
+static const struct exynos_pmu_data exynos850_pmu_data = {
+	.pmu_init = exynos850_pmu_init,
+};
+
+static int exynos_pmu_bind(struct udevice *dev)
+{
+	dev_or_flags(dev, DM_FLAG_PROBE_AFTER_BIND);
+	return 0;
+}
+
+static int exynos_pmu_probe(struct udevice *dev)
+{
+	ofnode node;
+	struct exynos_pmu *priv;
+
+	priv = dev_get_priv(dev);
+	priv->dev = dev;
+
+	node = dev_ofnode(dev);
+	priv->regmap = syscon_node_to_regmap(node);
+	if (IS_ERR(priv->regmap))
+		return PTR_ERR(priv->regmap);
+
+	priv->pmu_data = (struct exynos_pmu_data *)dev_get_driver_data(dev);
+	if (priv->pmu_data && priv->pmu_data->pmu_init)
+		return priv->pmu_data->pmu_init(priv);
+
+	return 0;
+}
+
+static const struct udevice_id exynos_pmu_ids[] = {
+	{
+		.compatible = "samsung,exynos850-pmu",
+		.data = (ulong)&exynos850_pmu_data
+	},
+	{ /* sentinel */ }
+};
+
+U_BOOT_DRIVER(exynos_pmu) = {
+	.name		= "exynos-pmu",
+	.id		= UCLASS_NOP,
+	.of_match	= exynos_pmu_ids,
+	.bind		= exynos_pmu_bind,
+	.probe		= exynos_pmu_probe,
+	.priv_auto	= sizeof(struct exynos_pmu),
+};
diff --git a/drivers/soc/samsung/exynos-usi.c b/drivers/soc/samsung/exynos-usi.c
new file mode 100644
index 0000000000..b746a7838e
--- /dev/null
+++ b/drivers/soc/samsung/exynos-usi.c
@@ -0,0 +1,208 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2023 Linaro Ltd.
+ * Author: Sam Protsenko <semen.protsenko@linaro.org>
+ *
+ * Samsung Exynos USI driver (Universal Serial Interface).
+ */
+
+#include <dm.h>
+#include <dm/device_compat.h>
+#include <errno.h>
+#include <regmap.h>
+#include <syscon.h>
+#include <asm/io.h>
+#include <linux/bitops.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+
+#include <dt-bindings/soc/samsung,exynos-usi.h>
+
+/* USIv2: System Register: SW_CONF register bits */
+#define USI_V2_SW_CONF_NONE	0x0
+#define USI_V2_SW_CONF_UART	BIT(0)
+#define USI_V2_SW_CONF_SPI	BIT(1)
+#define USI_V2_SW_CONF_I2C	BIT(2)
+#define USI_V2_SW_CONF_MASK	(USI_V2_SW_CONF_UART | USI_V2_SW_CONF_SPI | \
+				 USI_V2_SW_CONF_I2C)
+
+/* USIv2: USI register offsets */
+#define USI_CON			0x04
+#define USI_OPTION		0x08
+
+/* USIv2: USI register bits */
+#define USI_CON_RESET		BIT(0)
+#define USI_OPTION_CLKREQ_ON	BIT(1)
+#define USI_OPTION_CLKSTOP_ON	BIT(2)
+
+enum exynos_usi_ver {
+	USI_VER2 = 2,
+};
+
+struct exynos_usi_variant {
+	enum exynos_usi_ver ver;	/* USI IP-core version */
+	unsigned int sw_conf_mask;	/* SW_CONF mask for all protocols */
+	size_t min_mode;		/* first index in exynos_usi_modes[] */
+	size_t max_mode;		/* last index in exynos_usi_modes[] */
+};
+
+struct exynos_usi {
+	void __iomem *regs;		/* USI register map */
+
+	size_t mode;			/* current USI SW_CONF mode index */
+	bool clkreq_on;			/* always provide clock to IP */
+
+	/* System Register */
+	struct regmap *sysreg;		/* System Register map */
+	unsigned int sw_conf;		/* SW_CONF register offset in sysreg */
+
+	const struct exynos_usi_variant *data;
+};
+
+struct exynos_usi_mode {
+	const char *name;		/* mode name */
+	unsigned int val;		/* mode register value */
+};
+
+static const struct exynos_usi_mode exynos_usi_modes[] = {
+	[USI_V2_NONE] =	{ .name = "none", .val = USI_V2_SW_CONF_NONE },
+	[USI_V2_UART] =	{ .name = "uart", .val = USI_V2_SW_CONF_UART },
+	[USI_V2_SPI] =	{ .name = "spi",  .val = USI_V2_SW_CONF_SPI },
+	[USI_V2_I2C] =	{ .name = "i2c",  .val = USI_V2_SW_CONF_I2C },
+};
+
+static const struct exynos_usi_variant exynos850_usi_data = {
+	.ver		= USI_VER2,
+	.sw_conf_mask	= USI_V2_SW_CONF_MASK,
+	.min_mode	= USI_V2_NONE,
+	.max_mode	= USI_V2_I2C,
+};
+
+static const struct udevice_id exynos_usi_ids[] = {
+	{
+		.compatible = "samsung,exynos850-usi",
+		.data = (ulong)&exynos850_usi_data,
+	},
+	{ } /* sentinel */
+};
+
+/**
+ * exynos_usi_set_sw_conf - Set USI block configuration mode
+ * @dev: Driver object
+ *
+ * Select underlying serial protocol (UART/SPI/I2C) in USI IP-core as specified
+ * in @usi.mode.
+ *
+ * Return: 0 on success, or negative error code on failure.
+ */
+static int exynos_usi_set_sw_conf(struct udevice *dev)
+{
+	struct exynos_usi *usi = dev_get_priv(dev);
+	size_t mode = usi->mode;
+	unsigned int val;
+	int ret;
+
+	if (mode < usi->data->min_mode || mode > usi->data->max_mode)
+		return -EINVAL;
+
+	val = exynos_usi_modes[mode].val;
+	ret = regmap_update_bits(usi->sysreg, usi->sw_conf,
+				 usi->data->sw_conf_mask, val);
+	if (ret)
+		return ret;
+
+	dev_dbg(dev, "protocol: %s\n", exynos_usi_modes[mode].name);
+
+	return 0;
+}
+
+/**
+ * exynos_usi_enable - Initialize USI block
+ * @usi: USI driver object
+ *
+ * USI IP-core start state is "reset" (on startup and after CPU resume). This
+ * routine enables the USI block by clearing the reset flag. It also configures
+ * HWACG behavior (needed e.g. for UART Rx). It should be performed before
+ * underlying protocol becomes functional.
+ */
+static void exynos_usi_enable(const struct exynos_usi *usi)
+{
+	u32 val;
+
+	/* Enable USI block */
+	val = readl(usi->regs + USI_CON);
+	val &= ~USI_CON_RESET;
+	writel(val, usi->regs + USI_CON);
+	udelay(1);
+
+	/* Continuously provide the clock to USI IP w/o gating */
+	if (usi->clkreq_on) {
+		val = readl(usi->regs + USI_OPTION);
+		val &= ~USI_OPTION_CLKSTOP_ON;
+		val |= USI_OPTION_CLKREQ_ON;
+		writel(val, usi->regs + USI_OPTION);
+	}
+}
+
+static int exynos_usi_configure(struct udevice *dev)
+{
+	struct exynos_usi *usi = dev_get_priv(dev);
+	int ret;
+
+	ret = exynos_usi_set_sw_conf(dev);
+	if (ret)
+		return ret;
+
+	if (usi->data->ver == USI_VER2)
+		exynos_usi_enable(usi);
+
+	return 0;
+}
+
+static int exynos_usi_of_to_plat(struct udevice *dev)
+{
+	struct exynos_usi *usi = dev_get_priv(dev);
+	ofnode node = dev_ofnode(dev);
+	int ret;
+	u32 mode;
+
+	usi->data = (struct exynos_usi_variant *)dev_get_driver_data(dev);
+	if (usi->data->ver == USI_VER2) {
+		usi->regs = dev_read_addr_ptr(dev);
+		if (!usi->regs)
+			return -ENODEV;
+	}
+
+	ret = ofnode_read_u32(node, "samsung,mode", &mode);
+	if (ret)
+		return ret;
+	if (mode < usi->data->min_mode || mode > usi->data->max_mode)
+		return -EINVAL;
+	usi->mode = mode;
+
+	usi->sysreg = syscon_regmap_lookup_by_phandle(dev, "samsung,sysreg");
+	if (IS_ERR(usi->sysreg))
+		return PTR_ERR(usi->sysreg);
+
+	ret = ofnode_read_u32_index(node, "samsung,sysreg", 1, &usi->sw_conf);
+	if (ret)
+		return ret;
+
+	usi->clkreq_on = ofnode_read_bool(node, "samsung,clkreq-on");
+
+	return 0;
+}
+
+static int exynos_usi_probe(struct udevice *dev)
+{
+	return exynos_usi_configure(dev);
+}
+
+U_BOOT_DRIVER(exynos_usi) = {
+	.name		= "exynos-usi",
+	.id		= UCLASS_MISC,
+	.of_match	= exynos_usi_ids,
+	.of_to_plat	= exynos_usi_of_to_plat,
+	.probe		= exynos_usi_probe,
+	.priv_auto	= sizeof(struct exynos_usi),
+};