clk: renesas: cpg-mssr: add R8A77980 support

Add R-Car V3H (R8A77980) Clock Pulse Generator / Module Standby and
Software Reset support,  using the CPG/MSSR driver core and the common
R-Car Gen3 code.

Based on the original (and large) patch by Vladimir Barinov.

Signed-off-by: Vladimir Barinov <vladimir.barinov@cogentembedded.com>
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

1 files changed, 227 insertions, 0 deletions

diff --git a/drivers/clk/renesas/r8a77980-cpg-mssr.c b/drivers/clk/renesas/r8a77980-cpg-mssr.c
new file mode 100644
index 000000000000..7aaae73a321a
--- /dev/null
+++ b/drivers/clk/renesas/r8a77980-cpg-mssr.c
@@ -0,0 +1,227 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * r8a77980 Clock Pulse Generator / Module Standby and Software Reset
+ *
+ * Copyright (C) 2018 Renesas Electronics Corp.
+ * Copyright (C) 2018 Cogent Embedded, Inc.
+ *
+ * Based on r8a7795-cpg-mssr.c
+ *
+ * Copyright (C) 2015 Glider bvba
+ */
+
+#include <linux/device.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/soc/renesas/rcar-rst.h>
+#include <linux/sys_soc.h>
+
+#include <dt-bindings/clock/r8a77980-cpg-mssr.h>
+
+#include "renesas-cpg-mssr.h"
+#include "rcar-gen3-cpg.h"
+
+enum clk_ids {
+	/* Core Clock Outputs exported to DT */
+	LAST_DT_CORE_CLK = R8A77980_CLK_OSC,
+
+	/* External Input Clocks */
+	CLK_EXTAL,
+	CLK_EXTALR,
+
+	/* Internal Core Clocks */
+	CLK_MAIN,
+	CLK_PLL1,
+	CLK_PLL2,
+	CLK_PLL3,
+	CLK_PLL1_DIV2,
+	CLK_PLL1_DIV4,
+	CLK_S0,
+	CLK_S1,
+	CLK_S2,
+	CLK_S3,
+	CLK_SDSRC,
+
+	/* Module Clocks */
+	MOD_CLK_BASE
+};
+
+static const struct cpg_core_clk r8a77980_core_clks[] __initconst = {
+	/* External Clock Inputs */
+	DEF_INPUT("extal",  CLK_EXTAL),
+	DEF_INPUT("extalr", CLK_EXTALR),
+
+	/* Internal Core Clocks */
+	DEF_BASE(".main",       CLK_MAIN, CLK_TYPE_GEN3_MAIN, CLK_EXTAL),
+	DEF_BASE(".pll1",       CLK_PLL1, CLK_TYPE_GEN3_PLL1, CLK_MAIN),
+	DEF_BASE(".pll2",       CLK_PLL2, CLK_TYPE_GEN3_PLL2, CLK_MAIN),
+	DEF_BASE(".pll3",       CLK_PLL3, CLK_TYPE_GEN3_PLL3, CLK_MAIN),
+
+	DEF_FIXED(".pll1_div2", CLK_PLL1_DIV2,	   CLK_PLL1,       2, 1),
+	DEF_FIXED(".pll1_div4", CLK_PLL1_DIV4,	   CLK_PLL1_DIV2,  2, 1),
+	DEF_FIXED(".s0",	CLK_S0,		   CLK_PLL1_DIV2,  2, 1),
+	DEF_FIXED(".s1",	CLK_S1,		   CLK_PLL1_DIV2,  3, 1),
+	DEF_FIXED(".s2",	CLK_S2,		   CLK_PLL1_DIV2,  4, 1),
+	DEF_FIXED(".s3",	CLK_S3,		   CLK_PLL1_DIV2,  6, 1),
+	DEF_FIXED(".sdsrc",	CLK_SDSRC,	   CLK_PLL1_DIV2,  2, 1),
+
+	/* Core Clock Outputs */
+	DEF_FIXED("ztr",	R8A77980_CLK_ZTR,   CLK_PLL1_DIV2,  6, 1),
+	DEF_FIXED("ztrd2",	R8A77980_CLK_ZTRD2, CLK_PLL1_DIV2, 12, 1),
+	DEF_FIXED("zt",		R8A77980_CLK_ZT,    CLK_PLL1_DIV2,  4, 1),
+	DEF_FIXED("zx",		R8A77980_CLK_ZX,    CLK_PLL1_DIV2,  2, 1),
+	DEF_FIXED("s0d1",	R8A77980_CLK_S0D1,  CLK_S0,         1, 1),
+	DEF_FIXED("s0d2",	R8A77980_CLK_S0D2,  CLK_S0,         2, 1),
+	DEF_FIXED("s0d3",	R8A77980_CLK_S0D3,  CLK_S0,         3, 1),
+	DEF_FIXED("s0d4",	R8A77980_CLK_S0D4,  CLK_S0,         4, 1),
+	DEF_FIXED("s0d6",	R8A77980_CLK_S0D6,  CLK_S0,         6, 1),
+	DEF_FIXED("s0d12",	R8A77980_CLK_S0D12, CLK_S0,        12, 1),
+	DEF_FIXED("s0d24",	R8A77980_CLK_S0D24, CLK_S0,        24, 1),
+	DEF_FIXED("s1d1",	R8A77980_CLK_S1D1,  CLK_S1,         1, 1),
+	DEF_FIXED("s1d2",	R8A77980_CLK_S1D2,  CLK_S1,         2, 1),
+	DEF_FIXED("s1d4",	R8A77980_CLK_S1D4,  CLK_S1,         4, 1),
+	DEF_FIXED("s2d1",	R8A77980_CLK_S2D1,  CLK_S2,         1, 1),
+	DEF_FIXED("s2d2",	R8A77980_CLK_S2D2,  CLK_S2,         2, 1),
+	DEF_FIXED("s2d4",	R8A77980_CLK_S2D4,  CLK_S2,         4, 1),
+	DEF_FIXED("s3d1",	R8A77980_CLK_S3D1,  CLK_S3,         1, 1),
+	DEF_FIXED("s3d2",	R8A77980_CLK_S3D2,  CLK_S3,         2, 1),
+	DEF_FIXED("s3d4",	R8A77980_CLK_S3D4,  CLK_S3,         4, 1),
+
+	DEF_GEN3_SD("sd0",	R8A77980_CLK_SD0,   CLK_SDSRC,	  0x0074),
+
+	DEF_FIXED("cl",		R8A77980_CLK_CL,    CLK_PLL1_DIV2, 48, 1),
+	DEF_FIXED("cp",		R8A77980_CLK_CP,    CLK_EXTAL,	    2, 1),
+	DEF_FIXED("cpex",	R8A77980_CLK_CPEX,  CLK_EXTAL,	    2, 1),
+
+	DEF_DIV6P1("canfd",	R8A77980_CLK_CANFD, CLK_PLL1_DIV4, 0x244),
+	DEF_DIV6P1("csi0",	R8A77980_CLK_CSI0,  CLK_PLL1_DIV4, 0x00c),
+	DEF_DIV6P1("mso",	R8A77980_CLK_MSO,   CLK_PLL1_DIV4, 0x014),
+};
+
+static const struct mssr_mod_clk r8a77980_mod_clks[] __initconst = {
+	DEF_MOD("tmu4",			 121,	R8A77980_CLK_S0D6),
+	DEF_MOD("tmu3",			 122,	R8A77980_CLK_S0D6),
+	DEF_MOD("tmu2",			 123,	R8A77980_CLK_S0D6),
+	DEF_MOD("tmu1",			 124,	R8A77980_CLK_S0D6),
+	DEF_MOD("tmu0",			 125,	R8A77980_CLK_CP),
+	DEF_MOD("scif4",		 203,	R8A77980_CLK_S3D4),
+	DEF_MOD("scif3",		 204,	R8A77980_CLK_S3D4),
+	DEF_MOD("scif1",		 206,	R8A77980_CLK_S3D4),
+	DEF_MOD("scif0",		 207,	R8A77980_CLK_S3D4),
+	DEF_MOD("msiof3",		 208,	R8A77980_CLK_MSO),
+	DEF_MOD("msiof2",		 209,	R8A77980_CLK_MSO),
+	DEF_MOD("msiof1",		 210,	R8A77980_CLK_MSO),
+	DEF_MOD("msiof0",		 211,	R8A77980_CLK_MSO),
+	DEF_MOD("sys-dmac2",		 217,	R8A77980_CLK_S0D3),
+	DEF_MOD("sys-dmac1",		 218,	R8A77980_CLK_S0D3),
+	DEF_MOD("tpu0",			 304,	R8A77980_CLK_S3D4),
+	DEF_MOD("sdif",			 314,	R8A77980_CLK_SD0),
+	DEF_MOD("pciec0",		 319,	R8A77980_CLK_S3D1),
+	DEF_MOD("intc-ex",		 407,	R8A77980_CLK_CP),
+	DEF_MOD("intc-ap",		 408,	R8A77980_CLK_S0D3),
+	DEF_MOD("hscif3",		 517,	R8A77980_CLK_S3D1),
+	DEF_MOD("hscif2",		 518,	R8A77980_CLK_S3D1),
+	DEF_MOD("hscif1",		 519,	R8A77980_CLK_S3D1),
+	DEF_MOD("hscif0",		 520,	R8A77980_CLK_S3D1),
+	DEF_MOD("imp4",			 521,	R8A77980_CLK_S1D1),
+	DEF_MOD("thermal",		 522,	R8A77980_CLK_CP),
+	DEF_MOD("pwm",			 523,	R8A77980_CLK_S0D12),
+	DEF_MOD("impdma1",		 526,	R8A77980_CLK_S1D1),
+	DEF_MOD("impdma0",		 527,	R8A77980_CLK_S1D1),
+	DEF_MOD("imp-ocv4",		 528,	R8A77980_CLK_S1D1),
+	DEF_MOD("imp-ocv3",		 529,	R8A77980_CLK_S1D1),
+	DEF_MOD("imp-ocv2",		 531,	R8A77980_CLK_S1D1),
+	DEF_MOD("fcpvd0",		 603,	R8A77980_CLK_S3D1),
+	DEF_MOD("vspd0",		 623,	R8A77980_CLK_S3D1),
+	DEF_MOD("csi41",		 715,	R8A77980_CLK_CSI0),
+	DEF_MOD("csi40",		 716,	R8A77980_CLK_CSI0),
+	DEF_MOD("du0",			 724,	R8A77980_CLK_S2D1),
+	DEF_MOD("lvds",			 727,	R8A77980_CLK_S2D1),
+	DEF_MOD("etheravb",		 812,	R8A77980_CLK_S3D2),
+	DEF_MOD("gether",		 813,	R8A77980_CLK_S3D2),
+	DEF_MOD("imp3",			 824,	R8A77980_CLK_S1D1),
+	DEF_MOD("imp2",			 825,	R8A77980_CLK_S1D1),
+	DEF_MOD("imp1",			 826,	R8A77980_CLK_S1D1),
+	DEF_MOD("imp0",			 827,	R8A77980_CLK_S1D1),
+	DEF_MOD("imp-ocv1",		 828,	R8A77980_CLK_S1D1),
+	DEF_MOD("imp-ocv0",		 829,	R8A77980_CLK_S1D1),
+	DEF_MOD("impram",		 830,	R8A77980_CLK_S1D1),
+	DEF_MOD("impcnn",		 831,	R8A77980_CLK_S1D1),
+	DEF_MOD("gpio5",		 907,	R8A77980_CLK_CP),
+	DEF_MOD("gpio4",		 908,	R8A77980_CLK_CP),
+	DEF_MOD("gpio3",		 909,	R8A77980_CLK_CP),
+	DEF_MOD("gpio2",		 910,	R8A77980_CLK_CP),
+	DEF_MOD("gpio1",		 911,	R8A77980_CLK_CP),
+	DEF_MOD("gpio0",		 912,	R8A77980_CLK_CP),
+	DEF_MOD("can-fd",		 914,	R8A77980_CLK_S3D2),
+	DEF_MOD("i2c4",			 927,	R8A77980_CLK_S0D6),
+	DEF_MOD("i2c3",			 928,	R8A77980_CLK_S0D6),
+	DEF_MOD("i2c2",			 929,	R8A77980_CLK_S3D2),
+	DEF_MOD("i2c1",			 930,	R8A77980_CLK_S3D2),
+	DEF_MOD("i2c0",			 931,	R8A77980_CLK_S3D2),
+};
+
+static const unsigned int r8a77980_crit_mod_clks[] __initconst = {
+	MOD_CLK_ID(408),	/* INTC-AP (GIC) */
+};
+
+
+/*
+ * CPG Clock Data
+ */
+
+/*
+ *   MD		EXTAL		PLL2	PLL1	PLL3
+ * 14 13	(MHz)
+ * --------------------------------------------------
+ * 0  0		16.66 x 1	x240	x192	x192
+ * 0  1		20    x 1	x200	x160	x160
+ * 1  0		27    x 1	x148	x118	x118
+ * 1  1		33.33 / 2	x240	x192	x192
+ */
+#define CPG_PLL_CONFIG_INDEX(md)	((((md) & BIT(14)) >> 13) | \
+					 (((md) & BIT(13)) >> 13))
+
+static const struct rcar_gen3_cpg_pll_config cpg_pll_configs[4] __initconst = {
+	/* EXTAL div	PLL1 mult/div	PLL3 mult/div */
+	{ 1,		192,	1,	192,	1,	},
+	{ 1,		160,	1,	160,	1,	},
+	{ 1,		118,	1,	118,	1,	},
+	{ 2,		192,	1,	192,	1,	},
+};
+
+static int __init r8a77980_cpg_mssr_init(struct device *dev)
+{
+	const struct rcar_gen3_cpg_pll_config *cpg_pll_config;
+	u32 cpg_mode;
+	int error;
+
+	error = rcar_rst_read_mode_pins(&cpg_mode);
+	if (error)
+		return error;
+
+	cpg_pll_config = &cpg_pll_configs[CPG_PLL_CONFIG_INDEX(cpg_mode)];
+
+	return rcar_gen3_cpg_init(cpg_pll_config, CLK_EXTALR, cpg_mode);
+}
+
+const struct cpg_mssr_info r8a77980_cpg_mssr_info __initconst = {
+	/* Core Clocks */
+	.core_clks = r8a77980_core_clks,
+	.num_core_clks = ARRAY_SIZE(r8a77980_core_clks),
+	.last_dt_core_clk = LAST_DT_CORE_CLK,
+	.num_total_core_clks = MOD_CLK_BASE,
+
+	/* Module Clocks */
+	.mod_clks = r8a77980_mod_clks,
+	.num_mod_clks = ARRAY_SIZE(r8a77980_mod_clks),
+	.num_hw_mod_clks = 12 * 32,
+
+	/* Critical Module Clocks */
+	.crit_mod_clks = r8a77980_crit_mod_clks,
+	.num_crit_mod_clks = ARRAY_SIZE(r8a77980_crit_mod_clks),
+
+	/* Callbacks */
+	.init = r8a77980_cpg_mssr_init,
+	.cpg_clk_register = rcar_gen3_cpg_clk_register,
+};