[PATCHv8][ 1/5] ARM i.MX35: Add devicetree support.
Denis Carikli
denis at eukrea.com
Tue Nov 12 06:24:15 EST 2013
From: Steffen Trumtrar <s.trumtrar at pengutronix.de>
Cc: Pawel Moll <pawel.moll at arm.com>
Cc: Mark Rutland <mark.rutland at arm.com>
Cc: Stephen Warren <swarren at wwwdotorg.org>
Cc: Ian Campbell <ijc+devicetree at hellion.org.uk>
Cc: Grant Likely <grant.likely at linaro.org>
Cc: Rob Herring <rob.herring at calxeda.com>
Cc: devicetree at vger.kernel.org
Cc: Russell King <linux at arm.linux.org.uk>
Cc: Sascha Hauer <kernel at pengutronix.de>
Cc: Shawn Guo <shawn.guo at linaro.org>
Cc: linux-arm-kernel at lists.infradead.org
Cc: Eric Bénard <eric at eukrea.com>
Signed-off-by: Steffen Trumtrar <s.trumtrar at pengutronix.de>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig at pengutronix.de>
Signed-off-by: Denis Carikli <denis at eukrea.com>
---
ChangeLog v7->v8:
- Splitted out the dts part.
- The commit message was updated accordingly.
- clk_max was removed from the documentation.
- status = "disabled"; was removed from the dts examples in the documentation.
- The imx35 pinctrl driver selection in Kconfig was splitted out.
- Some unused variables were removed from mx35_clocks_init_dt in clk-imx35.c
ChangeLog v6->v7:
- Added Grant Likely in the Cc list.
- Added imx35-pingrp.h, and converted the rest of the patch to use it.
- lcdc pads were moved from the dtsi into another commit.
- A whitespace issue in the dtsi was removed.
ChangeLog v5->v6:
- The dependency on pdata clocks has been removed,
and the dtsi adapted accordinly.
- Adaptation to the for-next branch of Shawn Guo at
git://git.linaro.org/people/shawnguo/linux-2.6.git for-next
- imx35-dt.c: very small whitespace cleanup.
- Kconfig: The selection of IMX_HAVE_PLATFORM_* has been removed.
- dtsi: The nodes were reordered alphabetically.
- dtsi: The aliases have been reordered alphabetically.
- Shawn Guo was added in the Cc.
---
.../devicetree/bindings/clock/imx35-clock.txt | 113 ++++++++++++++++++++
arch/arm/mach-imx/Kconfig | 7 ++
arch/arm/mach-imx/Makefile | 1 +
arch/arm/mach-imx/clk-imx35.c | 16 +++
arch/arm/mach-imx/common.h | 1 +
arch/arm/mach-imx/imx35-dt.c | 48 +++++++++
6 files changed, 186 insertions(+)
create mode 100644 Documentation/devicetree/bindings/clock/imx35-clock.txt
create mode 100644 arch/arm/mach-imx/imx35-dt.c
diff --git a/Documentation/devicetree/bindings/clock/imx35-clock.txt b/Documentation/devicetree/bindings/clock/imx35-clock.txt
new file mode 100644
index 0000000..a703564
--- /dev/null
+++ b/Documentation/devicetree/bindings/clock/imx35-clock.txt
@@ -0,0 +1,113 @@
+* Clock bindings for Freescale i.MX35
+
+Required properties:
+- compatible: Should be "fsl,imx35-ccm"
+- reg: Address and length of the register set
+- interrupts: Should contain CCM interrupt
+- #clock-cells: Should be <1>
+
+The clock consumer should specify the desired clock by having the clock
+ID in its "clocks" phandle cell. The following is a full list of i.MX35
+clocks and IDs.
+
+ Clock ID
+ ---------------------------
+ ckih 0
+ mpll 1
+ ppll 2
+ mpll_075 3
+ arm 4
+ hsp 5
+ hsp_div 6
+ hsp_sel 7
+ ahb 8
+ ipg 9
+ arm_per_div 10
+ ahb_per_div 11
+ ipg_per 12
+ uart_sel 13
+ uart_div 14
+ esdhc_sel 15
+ esdhc1_div 16
+ esdhc2_div 17
+ esdhc3_div 18
+ spdif_sel 19
+ spdif_div_pre 20
+ spdif_div_post 21
+ ssi_sel 22
+ ssi1_div_pre 23
+ ssi1_div_post 24
+ ssi2_div_pre 25
+ ssi2_div_post 26
+ usb_sel 27
+ usb_div 28
+ nfc_div 29
+ asrc_gate 30
+ pata_gate 31
+ audmux_gate 32
+ can1_gate 33
+ can2_gate 34
+ cspi1_gate 35
+ cspi2_gate 36
+ ect_gate 37
+ edio_gate 38
+ emi_gate 39
+ epit1_gate 40
+ epit2_gate 41
+ esai_gate 42
+ esdhc1_gate 43
+ esdhc2_gate 44
+ esdhc3_gate 45
+ fec_gate 46
+ gpio1_gate 47
+ gpio2_gate 48
+ gpio3_gate 49
+ gpt_gate 50
+ i2c1_gate 51
+ i2c2_gate 52
+ i2c3_gate 53
+ iomuxc_gate 54
+ ipu_gate 55
+ kpp_gate 56
+ mlb_gate 57
+ mshc_gate 58
+ owire_gate 59
+ pwm_gate 60
+ rngc_gate 61
+ rtc_gate 62
+ rtic_gate 63
+ scc_gate 64
+ sdma_gate 65
+ spba_gate 66
+ spdif_gate 67
+ ssi1_gate 68
+ ssi2_gate 69
+ uart1_gate 70
+ uart2_gate 71
+ uart3_gate 72
+ usbotg_gate 73
+ wdog_gate 74
+ max_gate 75
+ admux_gate 76
+ csi_gate 77
+ csi_div 78
+ csi_sel 79
+ iim_gate 80
+ gpu2d_gate 81
+
+Examples:
+
+clks: ccm at 53f80000 {
+ compatible = "fsl,imx35-ccm";
+ reg = <0x53f80000 0x4000>;
+ interrupts = <31>;
+ #clock-cells = <1>;
+};
+
+esdhc1: esdhc at 53fb4000 {
+ compatible = "fsl,imx35-esdhc";
+ reg = <0x53fb4000 0x4000>;
+ interrupts = <7>;
+ clocks = <&clks 9>, <&clks 8>, <&clks 43>;
+ clock-names = "ipg", "ahb", "per";
+};
diff --git a/arch/arm/mach-imx/Kconfig b/arch/arm/mach-imx/Kconfig
index 8f6ce05..36014e2 100644
--- a/arch/arm/mach-imx/Kconfig
+++ b/arch/arm/mach-imx/Kconfig
@@ -611,6 +611,13 @@ config MACH_IMX31_DT
comment "MX35 platforms:"
+config MACH_IMX35_DT
+ bool "Support i.MX35 platforms from device tree"
+ select SOC_IMX35
+ help
+ Include support for Freescale i.MX35 based platforms
+ using the device tree for discovery.
+
config MACH_PCM043
bool "Support Phytec pcm043 (i.MX35) platforms"
select IMX_HAVE_PLATFORM_FLEXCAN
diff --git a/arch/arm/mach-imx/Makefile b/arch/arm/mach-imx/Makefile
index 0db1697..befcaf5 100644
--- a/arch/arm/mach-imx/Makefile
+++ b/arch/arm/mach-imx/Makefile
@@ -89,6 +89,7 @@ obj-$(CONFIG_MACH_MX35_3DS) += mach-mx35_3ds.o
obj-$(CONFIG_MACH_EUKREA_CPUIMX35SD) += mach-cpuimx35.o
obj-$(CONFIG_MACH_EUKREA_MBIMXSD35_BASEBOARD) += eukrea_mbimxsd35-baseboard.o
obj-$(CONFIG_MACH_VPR200) += mach-vpr200.o
+obj-$(CONFIG_MACH_IMX35_DT) += imx35-dt.o
obj-$(CONFIG_HAVE_IMX_ANATOP) += anatop.o
obj-$(CONFIG_HAVE_IMX_GPC) += gpc.o
diff --git a/arch/arm/mach-imx/clk-imx35.c b/arch/arm/mach-imx/clk-imx35.c
index 2193c83..9ef3c55 100644
--- a/arch/arm/mach-imx/clk-imx35.c
+++ b/arch/arm/mach-imx/clk-imx35.c
@@ -45,6 +45,8 @@ static struct arm_ahb_div clk_consumer[] = {
static char hsp_div_532[] = { 4, 8, 3, 0 };
static char hsp_div_400[] = { 3, 6, 3, 0 };
+static struct clk_onecell_data clk_data;
+
static const char *std_sel[] = {"ppll", "arm"};
static const char *ipg_per_sel[] = {"ahb_per_div", "arm_per_div"};
@@ -286,3 +288,17 @@ int __init mx35_clocks_init(void)
return 0;
}
+
+int __init mx35_clocks_init_dt(void)
+{
+ struct device_node *np;
+
+ np = of_find_compatible_node(NULL, NULL, "fsl,imx35-ccm");
+ clk_data.clks = clk;
+ clk_data.clk_num = ARRAY_SIZE(clk);
+ of_clk_add_provider(np, of_clk_src_onecell_get, &clk_data);
+
+ mx35_clocks_init();
+
+ return 0;
+}
diff --git a/arch/arm/mach-imx/common.h b/arch/arm/mach-imx/common.h
index 59c3b9b..6919b7d 100644
--- a/arch/arm/mach-imx/common.h
+++ b/arch/arm/mach-imx/common.h
@@ -65,6 +65,7 @@ int mx35_clocks_init(void);
int mx51_clocks_init(unsigned long ckil, unsigned long osc,
unsigned long ckih1, unsigned long ckih2);
int mx25_clocks_init_dt(void);
+int mx35_clocks_init_dt(void);
int mx27_clocks_init_dt(void);
int mx31_clocks_init_dt(void);
struct platform_device *mxc_register_gpio(char *name, int id,
diff --git a/arch/arm/mach-imx/imx35-dt.c b/arch/arm/mach-imx/imx35-dt.c
new file mode 100644
index 0000000..e3def45
--- /dev/null
+++ b/arch/arm/mach-imx/imx35-dt.c
@@ -0,0 +1,48 @@
+/*
+ * Copyright 2012 Steffen Trumtrar, Pengutronix
+ *
+ * based on imx27-dt.c
+ *
+ * This program is free software; you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License version 2 as published by the
+ * Free Software Foundation.
+ */
+
+#include <linux/irq.h>
+#include <linux/irqdomain.h>
+#include <linux/of_irq.h>
+#include <linux/of_platform.h>
+#include <asm/mach/arch.h>
+#include <asm/mach/time.h>
+#include <asm/hardware/cache-l2x0.h>
+#include "common.h"
+#include "mx35.h"
+
+static void __init imx35_dt_init(void)
+{
+ mxc_arch_reset_init_dt();
+
+ of_platform_populate(NULL, of_default_bus_match_table,
+ NULL, NULL);
+}
+
+static void __init imx35_timer_init(void)
+{
+ mx35_clocks_init_dt();
+}
+
+static const char *imx35_dt_board_compat[] __initdata = {
+ "fsl,imx35",
+ NULL
+};
+
+DT_MACHINE_START(IMX35_DT, "Freescale i.MX35 (Device Tree Support)")
+ .map_io = mx35_map_io,
+ .init_early = imx35_init_early,
+ .init_irq = mx35_init_irq,
+ .handle_irq = imx35_handle_irq,
+ .init_time = imx35_timer_init,
+ .init_machine = imx35_dt_init,
+ .dt_compat = imx35_dt_board_compat,
+ .restart = mxc_restart,
+MACHINE_END
--
1.7.9.5
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