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Subject[PATCH v2 09/10] clk: renesas: r8a7792: Add new CPG/MSSR driver
Date
Add a new R-Car V2H Clock Pulse Generator / Module Standby and Software
Reset driver, using the CPG/MSSR driver core. This will enable support
for module resets, which are not supported by the existing driver.

The old driver can still be used through a Kconfig option, to preserve
backward compatibility with old DTBs.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
---
v2:
- Rebase,
- Add more rationale.
---
drivers/clk/renesas/Kconfig | 5 +-
drivers/clk/renesas/Makefile | 1 +
drivers/clk/renesas/r8a7792-cpg-mssr.c | 221 +++++++++++++++++++++++++++++++++
drivers/clk/renesas/renesas-cpg-mssr.c | 6 +
drivers/clk/renesas/renesas-cpg-mssr.h | 1 +
5 files changed, 232 insertions(+), 2 deletions(-)
create mode 100644 drivers/clk/renesas/r8a7792-cpg-mssr.c

diff --git a/drivers/clk/renesas/Kconfig b/drivers/clk/renesas/Kconfig
index 9826ac6a7596fd69..076804f9f02dc83c 100644
--- a/drivers/clk/renesas/Kconfig
+++ b/drivers/clk/renesas/Kconfig
@@ -21,7 +21,7 @@ if CLK_RENESAS

config CLK_RENESAS_LEGACY
bool "Legacy DT clock support"
- depends on CLK_R8A7790 || CLK_R8A7791
+ depends on CLK_R8A7790 || CLK_R8A7791 || CLK_R8A7792
default y
help
Enable backward compatibility with old device trees describing a
@@ -77,7 +77,8 @@ config CLK_R8A7791

config CLK_R8A7792
bool
- select CLK_RCAR_GEN2
+ select CLK_RCAR_GEN2 if CLK_RENESAS_LEGACY
+ select CLK_RCAR_GEN2_CPG

config CLK_R8A7794
bool
diff --git a/drivers/clk/renesas/Makefile b/drivers/clk/renesas/Makefile
index 7f70a2a1c514e91f..f14a4e5d629bfc85 100644
--- a/drivers/clk/renesas/Makefile
+++ b/drivers/clk/renesas/Makefile
@@ -9,6 +9,7 @@ obj-$(CONFIG_CLK_R8A7778) += clk-r8a7778.o
obj-$(CONFIG_CLK_R8A7779) += clk-r8a7779.o
obj-$(CONFIG_CLK_R8A7790) += r8a7790-cpg-mssr.o
obj-$(CONFIG_CLK_R8A7791) += r8a7791-cpg-mssr.o
+obj-$(CONFIG_CLK_R8A7792) += r8a7792-cpg-mssr.o
obj-$(CONFIG_CLK_R8A7795) += r8a7795-cpg-mssr.o
obj-$(CONFIG_CLK_R8A7796) += r8a7796-cpg-mssr.o
obj-$(CONFIG_CLK_SH73A0) += clk-sh73a0.o
diff --git a/drivers/clk/renesas/r8a7792-cpg-mssr.c b/drivers/clk/renesas/r8a7792-cpg-mssr.c
new file mode 100644
index 0000000000000000..a832b9b6f7b0dde8
--- /dev/null
+++ b/drivers/clk/renesas/r8a7792-cpg-mssr.c
@@ -0,0 +1,221 @@
+/*
+ * r8a7792 Clock Pulse Generator / Module Standby and Software Reset
+ *
+ * Copyright (C) 2017 Glider bvba
+ *
+ * Based on clk-rcar-gen2.c
+ *
+ * Copyright (C) 2013 Ideas On Board SPRL
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ */
+
+#include <linux/device.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/soc/renesas/rcar-rst.h>
+
+#include <dt-bindings/clock/r8a7792-cpg-mssr.h>
+
+#include "renesas-cpg-mssr.h"
+#include "rcar-gen2-cpg.h"
+
+enum clk_ids {
+ /* Core Clock Outputs exported to DT */
+ LAST_DT_CORE_CLK = R8A7792_CLK_OSC,
+
+ /* External Input Clocks */
+ CLK_EXTAL,
+
+ /* Internal Core Clocks */
+ CLK_MAIN,
+ CLK_PLL0,
+ CLK_PLL1,
+ CLK_PLL3,
+ CLK_PLL1_DIV2,
+
+ /* Module Clocks */
+ MOD_CLK_BASE
+};
+
+static const struct cpg_core_clk r8a7792_core_clks[] __initconst = {
+ /* External Clock Inputs */
+ DEF_INPUT("extal", CLK_EXTAL),
+
+ /* Internal Core Clocks */
+ DEF_BASE(".main", CLK_MAIN, CLK_TYPE_GEN2_MAIN, CLK_EXTAL),
+ DEF_BASE(".pll0", CLK_PLL0, CLK_TYPE_GEN2_PLL0, CLK_MAIN),
+ DEF_BASE(".pll1", CLK_PLL1, CLK_TYPE_GEN2_PLL1, CLK_MAIN),
+ DEF_BASE(".pll3", CLK_PLL3, CLK_TYPE_GEN2_PLL3, CLK_MAIN),
+
+ DEF_FIXED(".pll1_div2", CLK_PLL1_DIV2, CLK_PLL1, 2, 1),
+
+ /* Core Clock Outputs */
+ DEF_BASE("lb", R8A7792_CLK_LB, CLK_TYPE_GEN2_LB, CLK_PLL1),
+ DEF_BASE("qspi", R8A7792_CLK_QSPI, CLK_TYPE_GEN2_QSPI, CLK_PLL1_DIV2),
+
+ DEF_FIXED("z", R8A7792_CLK_Z, CLK_PLL0, 1, 1),
+ DEF_FIXED("zg", R8A7792_CLK_ZG, CLK_PLL1, 5, 1),
+ DEF_FIXED("zx", R8A7792_CLK_ZX, CLK_PLL1, 3, 1),
+ DEF_FIXED("zs", R8A7792_CLK_ZS, CLK_PLL1, 6, 1),
+ DEF_FIXED("hp", R8A7792_CLK_HP, CLK_PLL1, 12, 1),
+ DEF_FIXED("i", R8A7792_CLK_I, CLK_PLL1, 3, 1),
+ DEF_FIXED("b", R8A7792_CLK_B, CLK_PLL1, 12, 1),
+ DEF_FIXED("p", R8A7792_CLK_P, CLK_PLL1, 24, 1),
+ DEF_FIXED("cl", R8A7792_CLK_CL, CLK_PLL1, 48, 1),
+ DEF_FIXED("m2", R8A7792_CLK_M2, CLK_PLL1, 8, 1),
+ DEF_FIXED("imp", R8A7792_CLK_IMP, CLK_PLL1, 4, 1),
+ DEF_FIXED("zb3", R8A7792_CLK_ZB3, CLK_PLL3, 4, 1),
+ DEF_FIXED("zb3d2", R8A7792_CLK_ZB3D2, CLK_PLL3, 8, 1),
+ DEF_FIXED("ddr", R8A7792_CLK_DDR, CLK_PLL3, 8, 1),
+ DEF_FIXED("sd", R8A7792_CLK_SD, CLK_PLL1_DIV2, 8, 1),
+ DEF_FIXED("mp", R8A7792_CLK_MP, CLK_PLL1_DIV2, 15, 1),
+ DEF_FIXED("cp", R8A7792_CLK_CP, CLK_PLL1, 48, 1),
+ DEF_FIXED("cpex", R8A7792_CLK_CPEX, CLK_EXTAL, 2, 1),
+ DEF_FIXED("rcan", R8A7792_CLK_RCAN, CLK_PLL1_DIV2, 49, 1),
+ DEF_FIXED("r", R8A7792_CLK_R, CLK_PLL1, 49152, 1),
+ DEF_FIXED("osc", R8A7792_CLK_OSC, CLK_PLL1, 12288, 1),
+};
+
+static const struct mssr_mod_clk r8a7792_mod_clks[] __initconst = {
+ DEF_MOD("msiof0", 0, R8A7792_CLK_MP),
+ DEF_MOD("jpu", 106, R8A7792_CLK_M2),
+ DEF_MOD("tmu1", 111, R8A7792_CLK_P),
+ DEF_MOD("3dg", 112, R8A7792_CLK_ZG),
+ DEF_MOD("2d-dmac", 115, R8A7792_CLK_ZS),
+ DEF_MOD("tmu3", 121, R8A7792_CLK_P),
+ DEF_MOD("tmu2", 122, R8A7792_CLK_P),
+ DEF_MOD("cmt0", 124, R8A7792_CLK_R),
+ DEF_MOD("tmu0", 125, R8A7792_CLK_CP),
+ DEF_MOD("vsp1du1", 127, R8A7792_CLK_ZS),
+ DEF_MOD("vsp1du0", 128, R8A7792_CLK_ZS),
+ DEF_MOD("vsp1-sy", 131, R8A7792_CLK_ZS),
+ DEF_MOD("msiof1", 208, R8A7792_CLK_MP),
+ DEF_MOD("sys-dmac1", 218, R8A7792_CLK_ZS),
+ DEF_MOD("sys-dmac0", 219, R8A7792_CLK_ZS),
+ DEF_MOD("tpu0", 304, R8A7792_CLK_CP),
+ DEF_MOD("sdhi0", 314, R8A7792_CLK_SD),
+ DEF_MOD("cmt1", 329, R8A7792_CLK_R),
+ DEF_MOD("irqc", 407, R8A7792_CLK_CP),
+ DEF_MOD("intc-sys", 408, R8A7792_CLK_ZS),
+ DEF_MOD("audio-dmac0", 502, R8A7792_CLK_HP),
+ DEF_MOD("thermal", 522, CLK_EXTAL),
+ DEF_MOD("pwm", 523, R8A7792_CLK_P),
+ DEF_MOD("hscif1", 716, R8A7792_CLK_ZS),
+ DEF_MOD("hscif0", 717, R8A7792_CLK_ZS),
+ DEF_MOD("scif3", 718, R8A7792_CLK_P),
+ DEF_MOD("scif2", 719, R8A7792_CLK_P),
+ DEF_MOD("scif1", 720, R8A7792_CLK_P),
+ DEF_MOD("scif0", 721, R8A7792_CLK_P),
+ DEF_MOD("du1", 723, R8A7792_CLK_ZX),
+ DEF_MOD("du0", 724, R8A7792_CLK_ZX),
+ DEF_MOD("vin5", 804, R8A7792_CLK_ZG),
+ DEF_MOD("vin4", 805, R8A7792_CLK_ZG),
+ DEF_MOD("vin3", 808, R8A7792_CLK_ZG),
+ DEF_MOD("vin2", 809, R8A7792_CLK_ZG),
+ DEF_MOD("vin1", 810, R8A7792_CLK_ZG),
+ DEF_MOD("vin0", 811, R8A7792_CLK_ZG),
+ DEF_MOD("etheravb", 812, R8A7792_CLK_HP),
+ DEF_MOD("gyro-adc", 901, R8A7792_CLK_P),
+ DEF_MOD("gpio7", 904, R8A7792_CLK_CP),
+ DEF_MOD("gpio6", 905, R8A7792_CLK_CP),
+ DEF_MOD("gpio5", 907, R8A7792_CLK_CP),
+ DEF_MOD("gpio4", 908, R8A7792_CLK_CP),
+ DEF_MOD("gpio3", 909, R8A7792_CLK_CP),
+ DEF_MOD("gpio2", 910, R8A7792_CLK_CP),
+ DEF_MOD("gpio1", 911, R8A7792_CLK_CP),
+ DEF_MOD("gpio0", 912, R8A7792_CLK_CP),
+ DEF_MOD("gpio11", 913, R8A7792_CLK_CP),
+ DEF_MOD("gpio10", 914, R8A7792_CLK_CP),
+ DEF_MOD("can1", 915, R8A7792_CLK_P),
+ DEF_MOD("can0", 916, R8A7792_CLK_P),
+ DEF_MOD("qspi_mod", 917, R8A7792_CLK_QSPI),
+ DEF_MOD("gpio9", 919, R8A7792_CLK_CP),
+ DEF_MOD("gpio8", 921, R8A7792_CLK_CP),
+ DEF_MOD("i2c5", 925, R8A7792_CLK_HP),
+ DEF_MOD("iicdvfs", 926, R8A7792_CLK_CP),
+ DEF_MOD("i2c4", 927, R8A7792_CLK_HP),
+ DEF_MOD("i2c3", 928, R8A7792_CLK_HP),
+ DEF_MOD("i2c2", 929, R8A7792_CLK_HP),
+ DEF_MOD("i2c1", 930, R8A7792_CLK_HP),
+ DEF_MOD("i2c0", 931, R8A7792_CLK_HP),
+ DEF_MOD("ssi-all", 1005, R8A7792_CLK_P),
+ DEF_MOD("ssi4", 1011, MOD_CLK_ID(1005)),
+ DEF_MOD("ssi3", 1012, MOD_CLK_ID(1005)),
+};
+
+static const unsigned int r8a7792_crit_mod_clks[] __initconst = {
+ MOD_CLK_ID(408), /* INTC-SYS (GIC) */
+};
+
+/*
+ * CPG Clock Data
+ */
+
+/*
+ * MD EXTAL PLL0 PLL1 PLL3
+ * 14 13 19 (MHz) *1 *2
+ *---------------------------------------------------
+ * 0 0 0 15 x200/3 x208/2 x106
+ * 0 0 1 15 x200/3 x208/2 x88
+ * 0 1 0 20 x150/3 x156/2 x80
+ * 0 1 1 20 x150/3 x156/2 x66
+ * 1 0 0 26 / 2 x230/3 x240/2 x122
+ * 1 0 1 26 / 2 x230/3 x240/2 x102
+ * 1 1 0 30 / 2 x200/3 x208/2 x106
+ * 1 1 1 30 / 2 x200/3 x208/2 x88
+ *
+ * *1 : Table 7.5b indicates VCO output (PLL0 = VCO/3)
+ * *2 : Table 7.5b indicates VCO output (PLL1 = VCO/2)
+ */
+#define CPG_PLL_CONFIG_INDEX(md) ((((md) & BIT(14)) >> 12) | \
+ (((md) & BIT(13)) >> 12) | \
+ (((md) & BIT(19)) >> 19))
+static const struct rcar_gen2_cpg_pll_config cpg_pll_configs[8] __initconst = {
+ { 1, 208, 106, 200 },
+ { 1, 208, 88, 200 },
+ { 1, 156, 80, 150 },
+ { 1, 156, 66, 150 },
+ { 2, 240, 122, 230 },
+ { 2, 240, 102, 230 },
+ { 2, 208, 106, 200 },
+ { 2, 208, 88, 200 },
+};
+
+static int __init r8a7792_cpg_mssr_init(struct device *dev)
+{
+ const struct rcar_gen2_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_gen2_cpg_init(cpg_pll_config, 3, cpg_mode);
+}
+
+const struct cpg_mssr_info r8a7792_cpg_mssr_info __initconst = {
+ /* Core Clocks */
+ .core_clks = r8a7792_core_clks,
+ .num_core_clks = ARRAY_SIZE(r8a7792_core_clks),
+ .last_dt_core_clk = LAST_DT_CORE_CLK,
+ .num_total_core_clks = MOD_CLK_BASE,
+
+ /* Module Clocks */
+ .mod_clks = r8a7792_mod_clks,
+ .num_mod_clks = ARRAY_SIZE(r8a7792_mod_clks),
+ .num_hw_mod_clks = 12 * 32,
+
+ /* Critical Module Clocks */
+ .crit_mod_clks = r8a7792_crit_mod_clks,
+ .num_crit_mod_clks = ARRAY_SIZE(r8a7792_crit_mod_clks),
+
+ /* Callbacks */
+ .init = r8a7792_cpg_mssr_init,
+ .cpg_clk_register = rcar_gen2_cpg_clk_register,
+};
diff --git a/drivers/clk/renesas/renesas-cpg-mssr.c b/drivers/clk/renesas/renesas-cpg-mssr.c
index ea6a47148030c208..067d0d84f4449b0a 100644
--- a/drivers/clk/renesas/renesas-cpg-mssr.c
+++ b/drivers/clk/renesas/renesas-cpg-mssr.c
@@ -656,6 +656,12 @@ static const struct of_device_id cpg_mssr_match[] = {
.data = &r8a7791_cpg_mssr_info,
},
#endif
+#ifdef CONFIG_CLK_R8A7792
+ {
+ .compatible = "renesas,r8a7792-cpg-mssr",
+ .data = &r8a7792_cpg_mssr_info,
+ },
+#endif
#ifdef CONFIG_CLK_R8A7795
{
.compatible = "renesas,r8a7795-cpg-mssr",
diff --git a/drivers/clk/renesas/renesas-cpg-mssr.h b/drivers/clk/renesas/renesas-cpg-mssr.h
index c93f36c471a32841..07d53fa3e867fa7b 100644
--- a/drivers/clk/renesas/renesas-cpg-mssr.h
+++ b/drivers/clk/renesas/renesas-cpg-mssr.h
@@ -134,6 +134,7 @@ extern const struct cpg_mssr_info r8a7743_cpg_mssr_info;
extern const struct cpg_mssr_info r8a7745_cpg_mssr_info;
extern const struct cpg_mssr_info r8a7790_cpg_mssr_info;
extern const struct cpg_mssr_info r8a7791_cpg_mssr_info;
+extern const struct cpg_mssr_info r8a7792_cpg_mssr_info;
extern const struct cpg_mssr_info r8a7795_cpg_mssr_info;
extern const struct cpg_mssr_info r8a7796_cpg_mssr_info;

--
2.7.4
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