lkml.org 
[lkml]   [2017]   [May]   [19]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v2 07/10] clk: renesas: r8a7790: Add new CPG/MSSR driver
Date
Add a new R-Car H2 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 | 13 +-
drivers/clk/renesas/Makefile | 1 +
drivers/clk/renesas/r8a7790-cpg-mssr.c | 278 +++++++++++++++++++++++++++++++++
drivers/clk/renesas/renesas-cpg-mssr.c | 6 +
drivers/clk/renesas/renesas-cpg-mssr.h | 1 +
5 files changed, 298 insertions(+), 1 deletion(-)
create mode 100644 drivers/clk/renesas/r8a7790-cpg-mssr.c

diff --git a/drivers/clk/renesas/Kconfig b/drivers/clk/renesas/Kconfig
index 9c8b44db39f14326..beeeefc6e45b8ef7 100644
--- a/drivers/clk/renesas/Kconfig
+++ b/drivers/clk/renesas/Kconfig
@@ -19,6 +19,16 @@ config CLK_RENESAS

if CLK_RENESAS

+config CLK_RENESAS_LEGACY
+ bool "Legacy DT clock support"
+ depends on CLK_R8A7790
+ default y
+ help
+ Enable backward compatibility with old device trees describing a
+ hierarchical representation of the various CPG and MSTP clocks.
+
+ Say Y if you want your kernel to work with old DTBs.
+
# SoC
config CLK_EMEV2
bool "Emma Mobile EV2 clock support" if COMPILE_TEST
@@ -55,7 +65,8 @@ config CLK_R8A7779

config CLK_R8A7790
bool
- select CLK_RCAR_GEN2
+ select CLK_RCAR_GEN2 if CLK_RENESAS_LEGACY
+ select CLK_RCAR_GEN2_CPG
select CLK_RENESAS_DIV6

config CLK_R8A7791
diff --git a/drivers/clk/renesas/Makefile b/drivers/clk/renesas/Makefile
index aa24c2f5078ca333..f0c622aadc6745bf 100644
--- a/drivers/clk/renesas/Makefile
+++ b/drivers/clk/renesas/Makefile
@@ -7,6 +7,7 @@ obj-$(CONFIG_CLK_R8A7743) += r8a7743-cpg-mssr.o
obj-$(CONFIG_CLK_R8A7745) += r8a7745-cpg-mssr.o
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_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/r8a7790-cpg-mssr.c b/drivers/clk/renesas/r8a7790-cpg-mssr.c
new file mode 100644
index 0000000000000000..46bb55bb223de0b6
--- /dev/null
+++ b/drivers/clk/renesas/r8a7790-cpg-mssr.c
@@ -0,0 +1,278 @@
+/*
+ * r8a7790 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/r8a7790-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 = R8A7790_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 r8a7790_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("z", R8A7790_CLK_Z, CLK_TYPE_GEN2_Z, CLK_PLL0),
+ DEF_BASE("lb", R8A7790_CLK_LB, CLK_TYPE_GEN2_LB, CLK_PLL1),
+ DEF_BASE("adsp", R8A7790_CLK_ADSP, CLK_TYPE_GEN2_ADSP, CLK_PLL1),
+ DEF_BASE("sdh", R8A7790_CLK_SDH, CLK_TYPE_GEN2_SDH, CLK_PLL1),
+ DEF_BASE("sd0", R8A7790_CLK_SD0, CLK_TYPE_GEN2_SD0, CLK_PLL1),
+ DEF_BASE("sd1", R8A7790_CLK_SD1, CLK_TYPE_GEN2_SD1, CLK_PLL1),
+ DEF_BASE("qspi", R8A7790_CLK_QSPI, CLK_TYPE_GEN2_QSPI, CLK_PLL1_DIV2),
+ DEF_BASE("rcan", R8A7790_CLK_RCAN, CLK_TYPE_GEN2_RCAN, CLK_USB_EXTAL),
+
+ DEF_FIXED("z2", R8A7790_CLK_Z2, CLK_PLL1, 2, 1),
+ DEF_FIXED("zg", R8A7790_CLK_ZG, CLK_PLL1, 3, 1),
+ DEF_FIXED("zx", R8A7790_CLK_ZX, CLK_PLL1, 3, 1),
+ DEF_FIXED("zs", R8A7790_CLK_ZS, CLK_PLL1, 6, 1),
+ DEF_FIXED("hp", R8A7790_CLK_HP, CLK_PLL1, 12, 1),
+ DEF_FIXED("i", R8A7790_CLK_I, CLK_PLL1, 2, 1),
+ DEF_FIXED("b", R8A7790_CLK_B, CLK_PLL1, 12, 1),
+ DEF_FIXED("p", R8A7790_CLK_P, CLK_PLL1, 24, 1),
+ DEF_FIXED("cl", R8A7790_CLK_CL, CLK_PLL1, 48, 1),
+ DEF_FIXED("m2", R8A7790_CLK_M2, CLK_PLL1, 8, 1),
+ DEF_FIXED("imp", R8A7790_CLK_IMP, CLK_PLL1, 4, 1),
+ DEF_FIXED("zb3", R8A7790_CLK_ZB3, CLK_PLL3, 4, 1),
+ DEF_FIXED("zb3d2", R8A7790_CLK_ZB3D2, CLK_PLL3, 8, 1),
+ DEF_FIXED("ddr", R8A7790_CLK_DDR, CLK_PLL3, 8, 1),
+ DEF_FIXED("mp", R8A7790_CLK_MP, CLK_PLL1_DIV2, 15, 1),
+ DEF_FIXED("cp", R8A7790_CLK_CP, CLK_EXTAL, 2, 1),
+ DEF_FIXED("r", R8A7790_CLK_R, CLK_PLL1, 49152, 1),
+ DEF_FIXED("osc", R8A7790_CLK_OSC, CLK_PLL1, 12288, 1),
+
+ DEF_DIV6P1("sd2", R8A7790_CLK_SD2, CLK_PLL1_DIV2, 0x078),
+ DEF_DIV6P1("sd3", R8A7790_CLK_SD3, CLK_PLL1_DIV2, 0x26c),
+ DEF_DIV6P1("mmc0", R8A7790_CLK_MMC0, CLK_PLL1_DIV2, 0x240),
+ DEF_DIV6P1("mmc1", R8A7790_CLK_MMC1, CLK_PLL1_DIV2, 0x244),
+ DEF_DIV6P1("ssp", R8A7790_CLK_SSP, CLK_PLL1_DIV2, 0x248),
+ DEF_DIV6P1("ssprs", R8A7790_CLK_SSPRS, CLK_PLL1_DIV2, 0x24c),
+};
+
+static const struct mssr_mod_clk r8a7790_mod_clks[] __initconst = {
+ DEF_MOD("msiof0", 0, R8A7790_CLK_MP),
+ DEF_MOD("vcp1", 100, R8A7790_CLK_ZS),
+ DEF_MOD("vcp0", 101, R8A7790_CLK_ZS),
+ DEF_MOD("vpc1", 102, R8A7790_CLK_ZS),
+ DEF_MOD("vpc0", 103, R8A7790_CLK_ZS),
+ DEF_MOD("jpu", 106, R8A7790_CLK_M2),
+ DEF_MOD("ssp1", 109, R8A7790_CLK_ZS),
+ DEF_MOD("tmu1", 111, R8A7790_CLK_P),
+ DEF_MOD("3dg", 112, R8A7790_CLK_ZG),
+ DEF_MOD("2d-dmac", 115, R8A7790_CLK_ZS),
+ DEF_MOD("fdp1-2", 117, R8A7790_CLK_ZS),
+ DEF_MOD("fdp1-1", 118, R8A7790_CLK_ZS),
+ DEF_MOD("fdp1-0", 119, R8A7790_CLK_ZS),
+ DEF_MOD("tmu3", 121, R8A7790_CLK_P),
+ DEF_MOD("tmu2", 122, R8A7790_CLK_P),
+ DEF_MOD("cmt0", 124, R8A7790_CLK_R),
+ DEF_MOD("tmu0", 125, R8A7790_CLK_CP),
+ DEF_MOD("vsp1du1", 127, R8A7790_CLK_ZS),
+ DEF_MOD("vsp1du0", 128, R8A7790_CLK_ZS),
+ DEF_MOD("vsp1-rt", 130, R8A7790_CLK_ZS),
+ DEF_MOD("vsp1-sy", 131, R8A7790_CLK_ZS),
+ DEF_MOD("scifa2", 202, R8A7790_CLK_MP),
+ DEF_MOD("scifa1", 203, R8A7790_CLK_MP),
+ DEF_MOD("scifa0", 204, R8A7790_CLK_MP),
+ DEF_MOD("msiof2", 205, R8A7790_CLK_MP),
+ DEF_MOD("scifb0", 206, R8A7790_CLK_MP),
+ DEF_MOD("scifb1", 207, R8A7790_CLK_MP),
+ DEF_MOD("msiof1", 208, R8A7790_CLK_MP),
+ DEF_MOD("msiof3", 215, R8A7790_CLK_MP),
+ DEF_MOD("scifb2", 216, R8A7790_CLK_MP),
+ DEF_MOD("sys-dmac1", 218, R8A7790_CLK_ZS),
+ DEF_MOD("sys-dmac0", 219, R8A7790_CLK_ZS),
+ DEF_MOD("iic2", 300, R8A7790_CLK_HP),
+ DEF_MOD("tpu0", 304, R8A7790_CLK_CP),
+ DEF_MOD("mmcif1", 305, R8A7790_CLK_MMC1),
+ DEF_MOD("scif2", 310, R8A7790_CLK_P),
+ DEF_MOD("sdhi3", 311, R8A7790_CLK_SD3),
+ DEF_MOD("sdhi2", 312, R8A7790_CLK_SD2),
+ DEF_MOD("sdhi1", 313, R8A7790_CLK_SD1),
+ DEF_MOD("sdhi0", 314, R8A7790_CLK_SD0),
+ DEF_MOD("mmcif0", 315, R8A7790_CLK_MMC0),
+ DEF_MOD("iic0", 318, R8A7790_CLK_HP),
+ DEF_MOD("pciec", 319, R8A7790_CLK_MP),
+ DEF_MOD("iic1", 323, R8A7790_CLK_HP),
+ DEF_MOD("usb3.0", 328, R8A7790_CLK_MP),
+ DEF_MOD("cmt1", 329, R8A7790_CLK_R),
+ DEF_MOD("usbhs-dmac0", 330, R8A7790_CLK_HP),
+ DEF_MOD("usbhs-dmac1", 331, R8A7790_CLK_HP),
+ DEF_MOD("irqc", 407, R8A7790_CLK_CP),
+ DEF_MOD("intc-sys", 408, R8A7790_CLK_ZS),
+ DEF_MOD("audio-dmac1", 501, R8A7790_CLK_HP),
+ DEF_MOD("audio-dmac0", 502, R8A7790_CLK_HP),
+ DEF_MOD("adsp_mod", 506, R8A7790_CLK_ADSP),
+ DEF_MOD("thermal", 522, CLK_EXTAL),
+ DEF_MOD("pwm", 523, R8A7790_CLK_P),
+ DEF_MOD("usb-ehci", 703, R8A7790_CLK_MP),
+ DEF_MOD("usbhs", 704, R8A7790_CLK_HP),
+ DEF_MOD("hscif1", 716, R8A7790_CLK_ZS),
+ DEF_MOD("hscif0", 717, R8A7790_CLK_ZS),
+ DEF_MOD("scif1", 720, R8A7790_CLK_P),
+ DEF_MOD("scif0", 721, R8A7790_CLK_P),
+ DEF_MOD("du2", 722, R8A7790_CLK_ZX),
+ DEF_MOD("du1", 723, R8A7790_CLK_ZX),
+ DEF_MOD("du0", 724, R8A7790_CLK_ZX),
+ DEF_MOD("lvds1", 725, R8A7790_CLK_ZX),
+ DEF_MOD("lvds0", 726, R8A7790_CLK_ZX),
+ DEF_MOD("mlb", 802, R8A7790_CLK_HP),
+ DEF_MOD("vin3", 808, R8A7790_CLK_ZG),
+ DEF_MOD("vin2", 809, R8A7790_CLK_ZG),
+ DEF_MOD("vin1", 810, R8A7790_CLK_ZG),
+ DEF_MOD("vin0", 811, R8A7790_CLK_ZG),
+ DEF_MOD("etheravb", 812, R8A7790_CLK_HP),
+ DEF_MOD("ether", 813, R8A7790_CLK_P),
+ DEF_MOD("sata1", 814, R8A7790_CLK_ZS),
+ DEF_MOD("sata0", 815, R8A7790_CLK_ZS),
+ DEF_MOD("gyro-adc", 901, R8A7790_CLK_P),
+ DEF_MOD("gpio5", 907, R8A7790_CLK_CP),
+ DEF_MOD("gpio4", 908, R8A7790_CLK_CP),
+ DEF_MOD("gpio3", 909, R8A7790_CLK_CP),
+ DEF_MOD("gpio2", 910, R8A7790_CLK_CP),
+ DEF_MOD("gpio1", 911, R8A7790_CLK_CP),
+ DEF_MOD("gpio0", 912, R8A7790_CLK_CP),
+ DEF_MOD("can1", 915, R8A7790_CLK_P),
+ DEF_MOD("can0", 916, R8A7790_CLK_P),
+ DEF_MOD("qspi_mod", 917, R8A7790_CLK_QSPI),
+ DEF_MOD("iicdvfs", 926, R8A7790_CLK_CP),
+ DEF_MOD("i2c3", 928, R8A7790_CLK_HP),
+ DEF_MOD("i2c2", 929, R8A7790_CLK_HP),
+ DEF_MOD("i2c1", 930, R8A7790_CLK_HP),
+ DEF_MOD("i2c0", 931, R8A7790_CLK_HP),
+ DEF_MOD("ssi-all", 1005, R8A7790_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, R8A7790_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-src9", 1022, MOD_CLK_ID(1017)),
+ DEF_MOD("scu-src8", 1023, MOD_CLK_ID(1017)),
+ DEF_MOD("scu-src7", 1024, 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("scu-src0", 1031, MOD_CLK_ID(1017)),
+};
+
+static const unsigned int r8a7790_crit_mod_clks[] __initconst = {
+ MOD_CLK_ID(408), /* INTC-SYS (GIC) */
+};
+
+/*
+ * CPG Clock Data
+ */
+
+/*
+ * MD EXTAL PLL0 PLL1 PLL3
+ * 14 13 19 (MHz) *1 *1
+ *---------------------------------------------------
+ * 0 0 0 15 x172/2 x208/2 x106
+ * 0 0 1 15 x172/2 x208/2 x88
+ * 0 1 0 20 x130/2 x156/2 x80
+ * 0 1 1 20 x130/2 x156/2 x66
+ * 1 0 0 26 / 2 x200/2 x240/2 x122
+ * 1 0 1 26 / 2 x200/2 x240/2 x102
+ * 1 1 0 30 / 2 x172/2 x208/2 x106
+ * 1 1 1 30 / 2 x172/2 x208/2 x88
+ *
+ * *1 : Table 7.5a indicates VCO output (PLLx = 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 }, { 1, 208, 88 }, { 1, 156, 80 }, { 1, 156, 66 },
+ { 2, 240, 122 }, { 2, 240, 102 }, { 2, 208, 106 }, { 2, 208, 88 },
+};
+
+static int __init r8a7790_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, 2, cpg_mode);
+}
+
+const struct cpg_mssr_info r8a7790_cpg_mssr_info __initconst = {
+ /* Core Clocks */
+ .core_clks = r8a7790_core_clks,
+ .num_core_clks = ARRAY_SIZE(r8a7790_core_clks),
+ .last_dt_core_clk = LAST_DT_CORE_CLK,
+ .num_total_core_clks = MOD_CLK_BASE,
+
+ /* Module Clocks */
+ .mod_clks = r8a7790_mod_clks,
+ .num_mod_clks = ARRAY_SIZE(r8a7790_mod_clks),
+ .num_hw_mod_clks = 12 * 32,
+
+ /* Critical Module Clocks */
+ .crit_mod_clks = r8a7790_crit_mod_clks,
+ .num_crit_mod_clks = ARRAY_SIZE(r8a7790_crit_mod_clks),
+
+ /* Callbacks */
+ .init = r8a7790_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 9ebe0bec42a8dbfc..76cb7a992b1a88eb 100644
--- a/drivers/clk/renesas/renesas-cpg-mssr.c
+++ b/drivers/clk/renesas/renesas-cpg-mssr.c
@@ -639,6 +639,12 @@ static const struct of_device_id cpg_mssr_match[] = {
.data = &r8a7745_cpg_mssr_info,
},
#endif
+#ifdef CONFIG_CLK_R8A7790
+ {
+ .compatible = "renesas,r8a7790-cpg-mssr",
+ .data = &r8a7790_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 148f4f0aa2a487b0..38fcb25c876ea3b5 100644
--- a/drivers/clk/renesas/renesas-cpg-mssr.h
+++ b/drivers/clk/renesas/renesas-cpg-mssr.h
@@ -132,6 +132,7 @@ struct cpg_mssr_info {

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 r8a7795_cpg_mssr_info;
extern const struct cpg_mssr_info r8a7796_cpg_mssr_info;

--
2.7.4
\
 
 \ /
  Last update: 2017-05-19 10:48    [W:0.109 / U:0.496 seconds]
©2003-2017 Jasper Spaans. hosted at Digital OceanAdvertise on this site