clk: renesas: r8a7794: Add new CPG/MSSR driver

Add a new R-Car E2 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>

diff --git a/drivers/clk/renesas/Kconfig b/drivers/clk/renesas/Kconfig
index 076804f9f02dc83c0499b964336095e117cff279..78d1df9112ba3932fe993c5f9700f00bb830a786 100644 (file)
--- 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 || CLK_R8A7792
+       depends on CLK_R8A7790 || CLK_R8A7791 || CLK_R8A7792 || CLK_R8A7794
        default y
        help
          Enable backward compatibility with old device trees describing a
@@ -82,7 +82,8 @@ config CLK_R8A7792
 
 config CLK_R8A7794
        bool
-       select CLK_RCAR_GEN2
+       select CLK_RCAR_GEN2 if CLK_RENESAS_LEGACY
+       select CLK_RCAR_GEN2_CPG
        select CLK_RENESAS_DIV6
 
 config CLK_R8A7795

diff --git a/drivers/clk/renesas/Makefile b/drivers/clk/renesas/Makefile
index f14a4e5d629bfc85bd330ee9a2fd5c793b7c5db7..02d04124371f717afee9ee21147144e38952586d 100644 (file)
--- a/drivers/clk/renesas/Makefile
+++ b/drivers/clk/renesas/Makefile
@@ -10,6 +10,7 @@ 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-$(CONFIG_CLK_R8A7794)              += r8a7794-cpg-mssr.o
 obj-$(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/r8a7794-cpg-mssr.c b/drivers/clk/renesas/r8a7794-cpg-mssr.c
new file mode 100644 (file)
index 0000000..ec091a4
--- /dev/null
+++ b/drivers/clk/renesas/r8a7794-cpg-mssr.c
@@ -0,0 +1,255 @@
+/*
+ * r8a7794 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/r8a7794-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 = R8A7794_CLK_OSC,
+
+       /* External Input Clocks */
+       CLK_EXTAL,
+       CLK_USB_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 r8a7794_core_clks[] __initconst = {
+       /* External Clock Inputs */
+       DEF_INPUT("extal",     CLK_EXTAL),
+       DEF_INPUT("usb_extal", CLK_USB_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",   R8A7794_CLK_LB,   CLK_TYPE_GEN2_LB,   CLK_PLL1),
+       DEF_BASE("adsp", R8A7794_CLK_ADSP, CLK_TYPE_GEN2_ADSP, CLK_PLL1),
+       DEF_BASE("sdh",  R8A7794_CLK_SDH,  CLK_TYPE_GEN2_SDH,  CLK_PLL1),
+       DEF_BASE("sd0",  R8A7794_CLK_SD0,  CLK_TYPE_GEN2_SD0,  CLK_PLL1),
+       DEF_BASE("qspi", R8A7794_CLK_QSPI, CLK_TYPE_GEN2_QSPI, CLK_PLL1_DIV2),
+       DEF_BASE("rcan", R8A7794_CLK_RCAN, CLK_TYPE_GEN2_RCAN, CLK_USB_EXTAL),
+
+       DEF_FIXED("z2",     R8A7794_CLK_Z2,    CLK_PLL0,          1, 1),
+       DEF_FIXED("zg",     R8A7794_CLK_ZG,    CLK_PLL1,          6, 1),
+       DEF_FIXED("zx",     R8A7794_CLK_ZX,    CLK_PLL1,          3, 1),
+       DEF_FIXED("zs",     R8A7794_CLK_ZS,    CLK_PLL1,          6, 1),
+       DEF_FIXED("hp",     R8A7794_CLK_HP,    CLK_PLL1,         12, 1),
+       DEF_FIXED("i",      R8A7794_CLK_I,     CLK_PLL1,          2, 1),
+       DEF_FIXED("b",      R8A7794_CLK_B,     CLK_PLL1,         12, 1),
+       DEF_FIXED("p",      R8A7794_CLK_P,     CLK_PLL1,         24, 1),
+       DEF_FIXED("cl",     R8A7794_CLK_CL,    CLK_PLL1,         48, 1),
+       DEF_FIXED("cp",     R8A7794_CLK_CP,    CLK_PLL1,         48, 1),
+       DEF_FIXED("m2",     R8A7794_CLK_M2,    CLK_PLL1,          8, 1),
+       DEF_FIXED("zb3",    R8A7794_CLK_ZB3,   CLK_PLL3,          4, 1),
+       DEF_FIXED("zb3d2",  R8A7794_CLK_ZB3D2, CLK_PLL3,          8, 1),
+       DEF_FIXED("ddr",    R8A7794_CLK_DDR,   CLK_PLL3,          8, 1),
+       DEF_FIXED("mp",     R8A7794_CLK_MP,    CLK_PLL1_DIV2,    15, 1),
+       DEF_FIXED("cpex",   R8A7794_CLK_CPEX,  CLK_EXTAL,         2, 1),
+       DEF_FIXED("r",      R8A7794_CLK_R,     CLK_PLL1,      49152, 1),
+       DEF_FIXED("osc",    R8A7794_CLK_OSC,   CLK_PLL1,      12288, 1),
+
+       DEF_DIV6P1("sd2",   R8A7794_CLK_SD2,   CLK_PLL1_DIV2, 0x078),
+       DEF_DIV6P1("sd3",   R8A7794_CLK_SD3,   CLK_PLL1_DIV2, 0x26c),
+       DEF_DIV6P1("mmc0",  R8A7794_CLK_MMC0,  CLK_PLL1_DIV2, 0x240),
+};
+
+static const struct mssr_mod_clk r8a7794_mod_clks[] __initconst = {
+       DEF_MOD("msiof0",                  0,   R8A7794_CLK_MP),
+       DEF_MOD("vcp0",                  101,   R8A7794_CLK_ZS),
+       DEF_MOD("vpc0",                  103,   R8A7794_CLK_ZS),
+       DEF_MOD("jpu",                   106,   R8A7794_CLK_M2),
+       DEF_MOD("tmu1",                  111,   R8A7794_CLK_P),
+       DEF_MOD("3dg",                   112,   R8A7794_CLK_ZG),
+       DEF_MOD("2d-dmac",               115,   R8A7794_CLK_ZS),
+       DEF_MOD("fdp1-0",                119,   R8A7794_CLK_ZS),
+       DEF_MOD("tmu3",                  121,   R8A7794_CLK_P),
+       DEF_MOD("tmu2",                  122,   R8A7794_CLK_P),
+       DEF_MOD("cmt0",                  124,   R8A7794_CLK_R),
+       DEF_MOD("tmu0",                  125,   R8A7794_CLK_CP),
+       DEF_MOD("vsp1du0",               128,   R8A7794_CLK_ZS),
+       DEF_MOD("vsp1-sy",               131,   R8A7794_CLK_ZS),
+       DEF_MOD("scifa2",                202,   R8A7794_CLK_MP),
+       DEF_MOD("scifa1",                203,   R8A7794_CLK_MP),
+       DEF_MOD("scifa0",                204,   R8A7794_CLK_MP),
+       DEF_MOD("msiof2",                205,   R8A7794_CLK_MP),
+       DEF_MOD("scifb0",                206,   R8A7794_CLK_MP),
+       DEF_MOD("scifb1",                207,   R8A7794_CLK_MP),
+       DEF_MOD("msiof1",                208,   R8A7794_CLK_MP),
+       DEF_MOD("scifb2",                216,   R8A7794_CLK_MP),
+       DEF_MOD("sys-dmac1",             218,   R8A7794_CLK_ZS),
+       DEF_MOD("sys-dmac0",             219,   R8A7794_CLK_ZS),
+       DEF_MOD("tpu0",                  304,   R8A7794_CLK_CP),
+       DEF_MOD("sdhi3",                 311,   R8A7794_CLK_SD3),
+       DEF_MOD("sdhi2",                 312,   R8A7794_CLK_SD2),
+       DEF_MOD("sdhi0",                 314,   R8A7794_CLK_SD0),
+       DEF_MOD("mmcif0",                315,   R8A7794_CLK_MMC0),
+       DEF_MOD("iic0",                  318,   R8A7794_CLK_HP),
+       DEF_MOD("iic1",                  323,   R8A7794_CLK_HP),
+       DEF_MOD("cmt1",                  329,   R8A7794_CLK_R),
+       DEF_MOD("usbhs-dmac0",           330,   R8A7794_CLK_HP),
+       DEF_MOD("usbhs-dmac1",           331,   R8A7794_CLK_HP),
+       DEF_MOD("irqc",                  407,   R8A7794_CLK_CP),
+       DEF_MOD("intc-sys",              408,   R8A7794_CLK_ZS),
+       DEF_MOD("audio-dmac0",           502,   R8A7794_CLK_HP),
+       DEF_MOD("adsp_mod",              506,   R8A7794_CLK_ADSP),
+       DEF_MOD("pwm",                   523,   R8A7794_CLK_P),
+       DEF_MOD("usb-ehci",              703,   R8A7794_CLK_MP),
+       DEF_MOD("usbhs",                 704,   R8A7794_CLK_HP),
+       DEF_MOD("hscif2",                713,   R8A7794_CLK_ZS),
+       DEF_MOD("scif5",                 714,   R8A7794_CLK_P),
+       DEF_MOD("scif4",                 715,   R8A7794_CLK_P),
+       DEF_MOD("hscif1",                716,   R8A7794_CLK_ZS),
+       DEF_MOD("hscif0",                717,   R8A7794_CLK_ZS),
+       DEF_MOD("scif3",                 718,   R8A7794_CLK_P),
+       DEF_MOD("scif2",                 719,   R8A7794_CLK_P),
+       DEF_MOD("scif1",                 720,   R8A7794_CLK_P),
+       DEF_MOD("scif0",                 721,   R8A7794_CLK_P),
+       DEF_MOD("du1",                   723,   R8A7794_CLK_ZX),
+       DEF_MOD("du0",                   724,   R8A7794_CLK_ZX),
+       DEF_MOD("ipmmu-sgx",             800,   R8A7794_CLK_ZX),
+       DEF_MOD("mlb",                   802,   R8A7794_CLK_HP),
+       DEF_MOD("vin1",                  810,   R8A7794_CLK_ZG),
+       DEF_MOD("vin0",                  811,   R8A7794_CLK_ZG),
+       DEF_MOD("etheravb",              812,   R8A7794_CLK_HP),
+       DEF_MOD("ether",                 813,   R8A7794_CLK_P),
+       DEF_MOD("gyro-adc",              901,   R8A7794_CLK_P),
+       DEF_MOD("gpio6",                 905,   R8A7794_CLK_CP),
+       DEF_MOD("gpio5",                 907,   R8A7794_CLK_CP),
+       DEF_MOD("gpio4",                 908,   R8A7794_CLK_CP),
+       DEF_MOD("gpio3",                 909,   R8A7794_CLK_CP),
+       DEF_MOD("gpio2",                 910,   R8A7794_CLK_CP),
+       DEF_MOD("gpio1",                 911,   R8A7794_CLK_CP),
+       DEF_MOD("gpio0",                 912,   R8A7794_CLK_CP),
+       DEF_MOD("can1",                  915,   R8A7794_CLK_P),
+       DEF_MOD("can0",                  916,   R8A7794_CLK_P),
+       DEF_MOD("qspi_mod",              917,   R8A7794_CLK_QSPI),
+       DEF_MOD("i2c5",                  925,   R8A7794_CLK_HP),
+       DEF_MOD("i2c4",                  927,   R8A7794_CLK_HP),
+       DEF_MOD("i2c3",                  928,   R8A7794_CLK_HP),
+       DEF_MOD("i2c2",                  929,   R8A7794_CLK_HP),
+       DEF_MOD("i2c1",                  930,   R8A7794_CLK_HP),
+       DEF_MOD("i2c0",                  931,   R8A7794_CLK_HP),
+       DEF_MOD("ssi-all",              1005,   R8A7794_CLK_P),
+       DEF_MOD("ssi9",                 1006,   MOD_CLK_ID(1005)),
+       DEF_MOD("ssi8",                 1007,   MOD_CLK_ID(1005)),
+       DEF_MOD("ssi7",                 1008,   MOD_CLK_ID(1005)),
+       DEF_MOD("ssi6",                 1009,   MOD_CLK_ID(1005)),
+       DEF_MOD("ssi5",                 1010,   MOD_CLK_ID(1005)),
+       DEF_MOD("ssi4",                 1011,   MOD_CLK_ID(1005)),
+       DEF_MOD("ssi3",                 1012,   MOD_CLK_ID(1005)),
+       DEF_MOD("ssi2",                 1013,   MOD_CLK_ID(1005)),
+       DEF_MOD("ssi1",                 1014,   MOD_CLK_ID(1005)),
+       DEF_MOD("ssi0",                 1015,   MOD_CLK_ID(1005)),
+       DEF_MOD("scu-all",              1017,   R8A7794_CLK_P),
+       DEF_MOD("scu-dvc1",             1018,   MOD_CLK_ID(1017)),
+       DEF_MOD("scu-dvc0",             1019,   MOD_CLK_ID(1017)),
+       DEF_MOD("scu-ctu1-mix1",        1020,   MOD_CLK_ID(1017)),
+       DEF_MOD("scu-ctu0-mix0",        1021,   MOD_CLK_ID(1017)),
+       DEF_MOD("scu-src6",             1025,   MOD_CLK_ID(1017)),
+       DEF_MOD("scu-src5",             1026,   MOD_CLK_ID(1017)),
+       DEF_MOD("scu-src4",             1027,   MOD_CLK_ID(1017)),
+       DEF_MOD("scu-src3",             1028,   MOD_CLK_ID(1017)),
+       DEF_MOD("scu-src2",             1029,   MOD_CLK_ID(1017)),
+       DEF_MOD("scu-src1",             1030,   MOD_CLK_ID(1017)),
+       DEF_MOD("scifa3",               1106,   R8A7794_CLK_MP),
+       DEF_MOD("scifa4",               1107,   R8A7794_CLK_MP),
+       DEF_MOD("scifa5",               1108,   R8A7794_CLK_MP),
+};
+
+static const unsigned int r8a7794_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  1     15              x200/3  x208/2  x88
+ * 0  1  1     20              x150/3  x156/2  x66
+ * 1  0  1     26 / 2          x230/3  x240/2  x102
+ * 1  1  1     30 / 2          x200/3  x208/2  x88
+ *
+ * *1 :        Table 7.5c indicates VCO output (PLL0 = VCO/3)
+ * *2 :        Table 7.5c indicates VCO output (PLL1 = VCO/2)
+ */
+#define CPG_PLL_CONFIG_INDEX(md)       ((((md) & BIT(14)) >> 13) | \
+                                        (((md) & BIT(13)) >> 13))
+static const struct rcar_gen2_cpg_pll_config cpg_pll_configs[4] __initconst = {
+       { 1, 208,  88, 200 },
+       { 1, 156,  66, 150 },
+       { 2, 240, 102, 230 },
+       { 2, 208,  88, 200 },
+};
+
+static int __init r8a7794_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 r8a7794_cpg_mssr_info __initconst = {
+       /* Core Clocks */
+       .core_clks = r8a7794_core_clks,
+       .num_core_clks = ARRAY_SIZE(r8a7794_core_clks),
+       .last_dt_core_clk = LAST_DT_CORE_CLK,
+       .num_total_core_clks = MOD_CLK_BASE,
+
+       /* Module Clocks */
+       .mod_clks = r8a7794_mod_clks,
+       .num_mod_clks = ARRAY_SIZE(r8a7794_mod_clks),
+       .num_hw_mod_clks = 12 * 32,
+
+       /* Critical Module Clocks */
+       .crit_mod_clks = r8a7794_crit_mod_clks,
+       .num_crit_mod_clks = ARRAY_SIZE(r8a7794_crit_mod_clks),
+
+       /* Callbacks */
+       .init = r8a7794_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 067d0d84f4449b0a2d9f73f9957950fe4ecde4be..f44a8125615bd75a44e7bd6be137b8e83c57f85a 100644 (file)
--- a/drivers/clk/renesas/renesas-cpg-mssr.c
+++ b/drivers/clk/renesas/renesas-cpg-mssr.c
@@ -662,6 +662,12 @@ static const struct of_device_id cpg_mssr_match[] = {
                .data = &r8a7792_cpg_mssr_info,
        },
 #endif
+#ifdef CONFIG_CLK_R8A7794
+       {
+               .compatible = "renesas,r8a7794-cpg-mssr",
+               .data = &r8a7794_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 07d53fa3e867fa7bf7f8f0e06a98f22d2122b3dd..43d7c7f6832df0b2e0b3aae788fb71beba122671 100644 (file)
--- a/drivers/clk/renesas/renesas-cpg-mssr.h
+++ b/drivers/clk/renesas/renesas-cpg-mssr.h
@@ -135,6 +135,7 @@ 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 r8a7794_cpg_mssr_info;
 extern const struct cpg_mssr_info r8a7795_cpg_mssr_info;
 extern const struct cpg_mssr_info r8a7796_cpg_mssr_info;