[PATCH 10/14] ARM: shmobile: Initial r7s72100 SoC support
Simon Horman
horms+renesas at verge.net.au
Wed Oct 9 02:49:54 EDT 2013
From: Magnus Damm <damm at opensource.se>
Add initial support for the r7272100 SoC including:
- Single Cortex-A9 CPU Core
- GIC
No static virtual mappings are used, all the components
make use of ioremap(). DT_MACHINE_START is still wrapped
in CONFIG_USE_OF to match other mach-shmobile code.
Signed-off-by: Magnus Damm <damm at opensource.se>
Signed-off-by: Simon Horman <horms+renesas at verge.net.au>
---
arch/arm/boot/dts/r7s72100.dtsi | 36 +++++
arch/arm/mach-shmobile/Kconfig | 6 +
arch/arm/mach-shmobile/Makefile | 2 +
arch/arm/mach-shmobile/clock-r7s72100.c | 194 +++++++++++++++++++++++++
arch/arm/mach-shmobile/include/mach/r7s72100.h | 7 +
arch/arm/mach-shmobile/setup-r7s72100.c | 43 ++++++
6 files changed, 288 insertions(+)
create mode 100644 arch/arm/boot/dts/r7s72100.dtsi
create mode 100644 arch/arm/mach-shmobile/clock-r7s72100.c
create mode 100644 arch/arm/mach-shmobile/include/mach/r7s72100.h
create mode 100644 arch/arm/mach-shmobile/setup-r7s72100.c
diff --git a/arch/arm/boot/dts/r7s72100.dtsi b/arch/arm/boot/dts/r7s72100.dtsi
new file mode 100644
index 0000000..46b82aa
--- /dev/null
+++ b/arch/arm/boot/dts/r7s72100.dtsi
@@ -0,0 +1,36 @@
+/*
+ * Device Tree Source for the r7s72100 SoC
+ *
+ * Copyright (C) 2013 Renesas Solutions Corp.
+ *
+ * This file is licensed under the terms of the GNU General Public License
+ * version 2. This program is licensed "as is" without any warranty of any
+ * kind, whether express or implied.
+ */
+
+/ {
+ compatible = "renesas,r7s72100";
+ interrupt-parent = <&gic>;
+ #address-cells = <1>;
+ #size-cells = <1>;
+
+ cpus {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ cpu at 0 {
+ device_type = "cpu";
+ compatible = "arm,cortex-a9";
+ reg = <0>;
+ };
+ };
+
+ gic: interrupt-controller at e8201000 {
+ compatible = "arm,cortex-a9-gic";
+ #interrupt-cells = <3>;
+ #address-cells = <0>;
+ interrupt-controller;
+ reg = <0xe8201000 0x1000>,
+ <0xe8202000 0x1000>;
+ };
+};
diff --git a/arch/arm/mach-shmobile/Kconfig b/arch/arm/mach-shmobile/Kconfig
index b452405..5dd5f9f 100644
--- a/arch/arm/mach-shmobile/Kconfig
+++ b/arch/arm/mach-shmobile/Kconfig
@@ -113,6 +113,12 @@ config ARCH_EMEV2
select ARM_GIC
select CPU_V7
+config ARCH_R7S72100
+ bool "RZ/A1H (R7S72100)"
+ select ARM_GIC
+ select CPU_V7
+ select SH_CLK_CPG
+
comment "SH-Mobile Board Type"
config MACH_APE6EVM
diff --git a/arch/arm/mach-shmobile/Makefile b/arch/arm/mach-shmobile/Makefile
index 3c37e82..95e48d1 100644
--- a/arch/arm/mach-shmobile/Makefile
+++ b/arch/arm/mach-shmobile/Makefile
@@ -18,6 +18,7 @@ obj-$(CONFIG_ARCH_R8A7790) += setup-r8a7790.o
obj-$(CONFIG_ARCH_R8A7790) += setup-r8a7790.o setup-rcar-gen2.o
obj-$(CONFIG_ARCH_R8A7791) += setup-r8a7791.o setup-rcar-gen2.o
obj-$(CONFIG_ARCH_EMEV2) += setup-emev2.o
+obj-$(CONFIG_ARCH_R7S72100) += setup-r7s72100.o
# Clock objects
ifndef CONFIG_COMMON_CLK
@@ -31,6 +32,7 @@ obj-$(CONFIG_ARCH_R8A7779) += clock-r8a7779.o
obj-$(CONFIG_ARCH_R8A7790) += clock-r8a7790.o
obj-$(CONFIG_ARCH_R8A7791) += clock-r8a7791.o
obj-$(CONFIG_ARCH_EMEV2) += clock-emev2.o
+obj-$(CONFIG_ARCH_R7S72100) += clock-r7s72100.o
endif
# SMP objects
diff --git a/arch/arm/mach-shmobile/clock-r7s72100.c b/arch/arm/mach-shmobile/clock-r7s72100.c
new file mode 100644
index 0000000..1e71094
--- /dev/null
+++ b/arch/arm/mach-shmobile/clock-r7s72100.c
@@ -0,0 +1,194 @@
+/*
+ * r7a72100 clock framework support
+ *
+ * Copyright (C) 2013 Renesas Solutions Corp.
+ * Copyright (C) 2012 Phil Edworthy
+ * Copyright (C) 2011 Magnus Damm
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/io.h>
+#include <linux/sh_clk.h>
+#include <linux/clkdev.h>
+#include <mach/common.h>
+#include <mach/r7s72100.h>
+
+/* registers */
+#define FRQCR 0xfcfe0010
+#define FRQCR2 0xfcfe0014
+#define STBCR3 0xfcfe0420
+#define STBCR4 0xfcfe0424
+
+#define PLL_RATE 30
+
+static struct clk_mapping cpg_mapping = {
+ .phys = 0xfcfe0000,
+ .len = 0x1000,
+};
+
+/* Fixed 32 KHz root clock for RTC */
+static struct clk r_clk = {
+ .rate = 32768,
+};
+
+/*
+ * Default rate for the root input clock, reset this with clk_set_rate()
+ * from the platform code.
+ */
+static struct clk extal_clk = {
+ .rate = 13330000,
+ .mapping = &cpg_mapping,
+};
+
+static unsigned long pll_recalc(struct clk *clk)
+{
+ return clk->parent->rate * PLL_RATE;
+}
+
+static struct sh_clk_ops pll_clk_ops = {
+ .recalc = pll_recalc,
+};
+
+static struct clk pll_clk = {
+ .ops = &pll_clk_ops,
+ .parent = &extal_clk,
+ .flags = CLK_ENABLE_ON_INIT,
+};
+
+static unsigned long bus_recalc(struct clk *clk)
+{
+ return clk->parent->rate * 2 / 3;
+}
+
+static struct sh_clk_ops bus_clk_ops = {
+ .recalc = bus_recalc,
+};
+
+static struct clk bus_clk = {
+ .ops = &bus_clk_ops,
+ .parent = &pll_clk,
+ .flags = CLK_ENABLE_ON_INIT,
+};
+
+static unsigned long peripheral0_recalc(struct clk *clk)
+{
+ return clk->parent->rate / 12;
+}
+
+static struct sh_clk_ops peripheral0_clk_ops = {
+ .recalc = peripheral0_recalc,
+};
+
+static struct clk peripheral0_clk = {
+ .ops = &peripheral0_clk_ops,
+ .parent = &pll_clk,
+ .flags = CLK_ENABLE_ON_INIT,
+};
+
+static unsigned long peripheral1_recalc(struct clk *clk)
+{
+ return clk->parent->rate / 6;
+}
+
+static struct sh_clk_ops peripheral1_clk_ops = {
+ .recalc = peripheral1_recalc,
+};
+
+static struct clk peripheral1_clk = {
+ .ops = &peripheral1_clk_ops,
+ .parent = &pll_clk,
+ .flags = CLK_ENABLE_ON_INIT,
+};
+
+struct clk *main_clks[] = {
+ &r_clk,
+ &extal_clk,
+ &pll_clk,
+ &bus_clk,
+ &peripheral0_clk,
+ &peripheral1_clk,
+};
+
+static int div2[] = { 1, 3, 0, 3 }; /* 1, 2/3, reserve, 1/3 */
+static int multipliers[] = { 1, 2, 1, 1 };
+
+static struct clk_div_mult_table div4_div_mult_table = {
+ .divisors = div2,
+ .nr_divisors = ARRAY_SIZE(div2),
+ .multipliers = multipliers,
+ .nr_multipliers = ARRAY_SIZE(multipliers),
+};
+
+static struct clk_div4_table div4_table = {
+ .div_mult_table = &div4_div_mult_table,
+};
+
+enum { DIV4_I,
+ DIV4_NR };
+
+#define DIV4(_reg, _bit, _mask, _flags) \
+ SH_CLK_DIV4(&pll_clk, _reg, _bit, _mask, _flags)
+
+/* The mask field specifies the div2 entries that are valid */
+struct clk div4_clks[DIV4_NR] = {
+ [DIV4_I] = DIV4(FRQCR, 8, 0xB, CLK_ENABLE_REG_16BIT
+ | CLK_ENABLE_ON_INIT),
+};
+
+enum { MSTP47, MSTP46, MSTP45, MSTP44, MSTP43, MSTP42, MSTP41, MSTP40,
+ MSTP33, MSTP_NR };
+
+static struct clk mstp_clks[MSTP_NR] = {
+ [MSTP47] = SH_CLK_MSTP8(&peripheral1_clk, STBCR4, 7, 0), /* SCIF0 */
+ [MSTP46] = SH_CLK_MSTP8(&peripheral1_clk, STBCR4, 6, 0), /* SCIF1 */
+ [MSTP45] = SH_CLK_MSTP8(&peripheral1_clk, STBCR4, 5, 0), /* SCIF2 */
+ [MSTP44] = SH_CLK_MSTP8(&peripheral1_clk, STBCR4, 4, 0), /* SCIF3 */
+ [MSTP43] = SH_CLK_MSTP8(&peripheral1_clk, STBCR4, 3, 0), /* SCIF4 */
+ [MSTP42] = SH_CLK_MSTP8(&peripheral1_clk, STBCR4, 2, 0), /* SCIF5 */
+ [MSTP41] = SH_CLK_MSTP8(&peripheral1_clk, STBCR4, 1, 0), /* SCIF6 */
+ [MSTP40] = SH_CLK_MSTP8(&peripheral1_clk, STBCR4, 0, 0), /* SCIF7 */
+ [MSTP33] = SH_CLK_MSTP8(&peripheral0_clk, STBCR3, 3, 0), /* MTU2 */
+};
+
+static struct clk_lookup lookups[] = {
+ /* main clocks */
+ CLKDEV_CON_ID("rclk", &r_clk),
+ CLKDEV_CON_ID("extal", &extal_clk),
+ CLKDEV_CON_ID("pll_clk", &pll_clk),
+ CLKDEV_CON_ID("peripheral_clk", &peripheral1_clk),
+
+ /* DIV4 clocks */
+ CLKDEV_CON_ID("cpu_clk", &div4_clks[DIV4_I]),
+
+ /* MSTP clocks */
+};
+
+void __init r7s72100_clock_init(void)
+{
+ int k, ret = 0;
+
+ for (k = 0; !ret && (k < ARRAY_SIZE(main_clks)); k++)
+ ret = clk_register(main_clks[k]);
+
+ clkdev_add_table(lookups, ARRAY_SIZE(lookups));
+
+ if (!ret)
+ ret = sh_clk_div4_register(div4_clks, DIV4_NR, &div4_table);
+
+ if (!ret)
+ ret = sh_clk_mstp_register(mstp_clks, MSTP_NR);
+
+ if (!ret)
+ shmobile_clk_init();
+ else
+ panic("failed to setup rza1 clocks\n");
+}
diff --git a/arch/arm/mach-shmobile/include/mach/r7s72100.h b/arch/arm/mach-shmobile/include/mach/r7s72100.h
new file mode 100644
index 0000000..f78062e
--- /dev/null
+++ b/arch/arm/mach-shmobile/include/mach/r7s72100.h
@@ -0,0 +1,7 @@
+#ifndef __ASM_R7S72100_H__
+#define __ASM_R7S72100_H__
+
+void r7s72100_clock_init(void);
+void r7s72100_init_early(void);
+
+#endif /* __ASM_R7S72100_H__ */
diff --git a/arch/arm/mach-shmobile/setup-r7s72100.c b/arch/arm/mach-shmobile/setup-r7s72100.c
new file mode 100644
index 0000000..c1aded0
--- /dev/null
+++ b/arch/arm/mach-shmobile/setup-r7s72100.c
@@ -0,0 +1,43 @@
+/*
+ * r7s72100 processor support
+ *
+ * Copyright (C) 2013 Renesas Solutions Corp.
+ * Copyright (C) 2013 Magnus Damm
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <linux/irq.h>
+#include <linux/kernel.h>
+#include <linux/of_platform.h>
+#include <mach/common.h>
+#include <mach/r7s72100.h>
+#include <asm/mach/arch.h>
+
+void __init r7s72100_init_early(void)
+{
+ shmobile_setup_delay(400, 1, 3); /* Cortex-A9 @ 400MHz */
+}
+
+#ifdef CONFIG_USE_OF
+static const char *r7s72100_boards_compat_dt[] __initdata = {
+ "renesas,r7s72100",
+ NULL,
+};
+
+DT_MACHINE_START(R7S72100_DT, "Generic R7S72100 (Flattened Device Tree)")
+ .init_early = r7s72100_init_early,
+ .dt_compat = r7s72100_boards_compat_dt,
+MACHINE_END
+#endif /* CONFIG_USE_OF */
--
1.8.4
More information about the linux-arm-kernel
mailing list