[PATCH v3 1/2] arm/mx5: add device tree support for imx53 boards
Shawn Guo
shawn.guo at freescale.com
Tue Aug 2 16:09:37 EST 2011
On Mon, Aug 01, 2011 at 11:01:39PM +0100, Grant Likely wrote:
> On Mon, Aug 1, 2011 at 8:17 PM, Shawn Guo <shawn.guo at linaro.org> wrote:
> > From: Shawn Guo <shawn.guo at freescale.com>
> >
> > It adds device tree support for imx53 boards.
> >
> > Signed-off-by: Shawn Guo <shawn.guo at linaro.org>
> > Cc: Grant Likely <grant.likely at secretlab.ca>
> > Cc: Sascha Hauer <s.hauer at pengutronix.de>
>
> It's *really* close, but I see a problem...
>
> > +static const char *imx53_dt_board_compat[] __initdata = {
> > + "fsl,imx53-ard",
> > + "fsl,imx53-evk",
> > + "fsl,imx53-qsb",
> > + "fsl,imx53-smd",
> > + NULL
> > +};
> > +
> > +DT_MACHINE_START(IMX53_DT, "Freescale i.MX53 (Device Tree Support)")
> > + .map_io = mx53_map_io,
> > + .init_early = imx53_init_early,
> > + .init_irq = mx53_init_irq,
> > + .timer = &imx53_timer,
> > + .init_machine = imx53_dt_init,
> > + .dt_compat = imx53_dt_board_compat,
> > +MACHINE_END
> > +
> > +DT_MACHINE_START(IMX53_DT_ARD, "Freescale i.MX53 ARD (Device Tree Support)")
> > + .map_io = mx53_map_io,
> > + .init_early = imx53_init_early,
> > + .init_irq = mx53_init_irq,
> > + .timer = &imx53_timer,
> > + .init_machine = imx53_ard_init,
> > + .dt_compat = imx53_dt_board_compat,
> > +MACHINE_END
>
> These two machine_descs will match on exactly the same boards because
> they use the same dt_compat table. So the ard variant will probably
> never get matched since it will be picked up by the IMX53_DT variant
> first. Each machine_desc must have a different match table.
>
I believe I tested it working when I split them into two machine_descs.
Oh, here is the evidence :)
$ arm-linux-gnueabi-objdump -t -j .init.arch.info vmlinux
vmlinux: file format elf32-littlearm
SYMBOL TABLE:
c03d73d0 l d .init.arch.info 00000000 .init.arch.info
c03d73d0 l O .init.arch.info 0000003c __mach_desc_MX53_EVK
c03d740c l O .init.arch.info 0000003c __mach_desc_MX53_SMD
c03d7448 l O .init.arch.info 0000003c __mach_desc_MX53_LOCO
c03d7484 l O .init.arch.info 0000003c __mach_desc_MX53_ARD
c03d74c0 l O .init.arch.info 0000003c __mach_desc_IMX53_DT_ARD
c03d74fc l O .init.arch.info 0000003c __mach_desc_IMX53_DT
c03d73d0 g .init.arch.info 00000000 __arch_info_begin
c03d7538 g .init.arch.info 00000000 __arch_info_end
It seems that gcc compiles the machine_desc in bottom-up order, so ARD
still can match the correct entry. When I change the code to put
IMX53_DT_ARD before IMX53_DT, the __mach_desc_IMX53_DT_ARD goes behind
__mach_desc_IMX53_DT, in which case the ARD matching will be broken.
So yes, we need to fix it.
> However, today when we were talking you asked if it would be better to
> use a callback into board-specific code instead of the iomux table
> that is implemented in this patch. I was fine either way, but my
> opinion was that the table would probably result in less code. Well,
> combined with the above problem, I think I was wrong. Since the only
> difference in the ard variant is the call to
> imx53_ard_weim_cs_config(), both the cs config and the iomux setup
> will be simpler if both are handled in a callback. You're original
> instinct was correct.
>
Ok, here you go.
---8<---
diff --git a/arch/arm/mach-mx5/board-mx53_ard.c b/arch/arm/mach-mx5/board-mx53_ard.c
index 76a67c4..9b4395d 100644
--- a/arch/arm/mach-mx5/board-mx53_ard.c
+++ b/arch/arm/mach-mx5/board-mx53_ard.c
@@ -171,9 +171,6 @@ static struct imxi2c_platform_data mx53_ard_i2c3_data = {
static void __init mx53_ard_io_init(void)
{
- mxc_iomux_v3_setup_multiple_pads(mx53_ard_pads,
- ARRAY_SIZE(mx53_ard_pads));
-
gpio_request(ARD_ETHERNET_INT_B, "eth-int-b");
gpio_direction_input(ARD_ETHERNET_INT_B);
@@ -216,6 +213,13 @@ static int weim_cs_config(void)
return 0;
}
+void __init imx53_ard_common_init(void)
+{
+ mxc_iomux_v3_setup_multiple_pads(mx53_ard_pads,
+ ARRAY_SIZE(mx53_ard_pads));
+ weim_cs_config();
+}
+
static struct platform_device *devices[] __initdata = {
&ard_smsc_lan9220_device,
};
@@ -225,8 +229,8 @@ static void __init mx53_ard_board_init(void)
imx53_soc_init();
imx53_add_imx_uart(0, NULL);
+ imx53_ard_common_init();
mx53_ard_io_init();
- weim_cs_config();
platform_add_devices(devices, ARRAY_SIZE(devices));
imx53_add_sdhci_esdhc_imx(0, &mx53_ard_sd1_data);
diff --git a/arch/arm/mach-mx5/board-mx53_evk.c b/arch/arm/mach-mx5/board-mx53_evk.c
index 1b417b0..7663905 100644
--- a/arch/arm/mach-mx5/board-mx53_evk.c
+++ b/arch/arm/mach-mx5/board-mx53_evk.c
@@ -131,12 +131,17 @@ static const struct spi_imx_master mx53_evk_spi_data __initconst = {
.num_chipselect = ARRAY_SIZE(mx53_evk_spi_cs),
};
+void __init imx53_evk_common_init(void)
+{
+ mxc_iomux_v3_setup_multiple_pads(mx53_evk_pads,
+ ARRAY_SIZE(mx53_evk_pads));
+}
+
static void __init mx53_evk_board_init(void)
{
imx53_soc_init();
+ imx53_evk_common_init();
- mxc_iomux_v3_setup_multiple_pads(mx53_evk_pads,
- ARRAY_SIZE(mx53_evk_pads));
mx53_evk_init_uart();
mx53_evk_fec_reset();
imx53_add_fec(&mx53_evk_fec_pdata);
diff --git a/arch/arm/mach-mx5/board-mx53_loco.c b/arch/arm/mach-mx5/board-mx53_loco.c
index 4e1d51d..3922cd5 100644
--- a/arch/arm/mach-mx5/board-mx53_loco.c
+++ b/arch/arm/mach-mx5/board-mx53_loco.c
@@ -257,12 +257,17 @@ static const struct gpio_led_platform_data mx53loco_leds_data __initconst = {
.num_leds = ARRAY_SIZE(mx53loco_leds),
};
+void __init imx53_qsb_common_init(void)
+{
+ mxc_iomux_v3_setup_multiple_pads(mx53_loco_pads,
+ ARRAY_SIZE(mx53_loco_pads));
+}
+
static void __init mx53_loco_board_init(void)
{
imx53_soc_init();
+ imx53_qsb_common_init();
- mxc_iomux_v3_setup_multiple_pads(mx53_loco_pads,
- ARRAY_SIZE(mx53_loco_pads));
imx53_add_imx_uart(0, NULL);
mx53_loco_fec_reset();
imx53_add_fec(&mx53_loco_fec_data);
diff --git a/arch/arm/mach-mx5/board-mx53_smd.c b/arch/arm/mach-mx5/board-mx53_smd.c
index bc02894..b10c899 100644
--- a/arch/arm/mach-mx5/board-mx53_smd.c
+++ b/arch/arm/mach-mx5/board-mx53_smd.c
@@ -111,12 +111,17 @@ static const struct imxi2c_platform_data mx53_smd_i2c_data __initconst = {
.bitrate = 100000,
};
+void __init imx53_smd_common_init(void)
+{
+ mxc_iomux_v3_setup_multiple_pads(mx53_smd_pads,
+ ARRAY_SIZE(mx53_smd_pads));
+}
+
static void __init mx53_smd_board_init(void)
{
imx53_soc_init();
+ imx53_smd_common_init();
- mxc_iomux_v3_setup_multiple_pads(mx53_smd_pads,
- ARRAY_SIZE(mx53_smd_pads));
mx53_smd_init_uart();
mx53_smd_fec_reset();
imx53_add_fec(&mx53_smd_fec_data);
diff --git a/arch/arm/mach-mx5/imx53-dt.c b/arch/arm/mach-mx5/imx53-dt.c
new file mode 100644
index 0000000..7a09af2
--- /dev/null
+++ b/arch/arm/mach-mx5/imx53-dt.c
@@ -0,0 +1,127 @@
+/*
+ * Copyright 2011 Freescale Semiconductor, Inc. All Rights Reserved.
+ * Copyright 2011 Linaro Ltd.
+ *
+ * The code contained herein is licensed under the GNU General Public
+ * License. You may obtain a copy of the GNU General Public License
+ * Version 2 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/gpl-license.html
+ * http://www.gnu.org/copyleft/gpl.html
+ */
+
+#include <linux/io.h>
+#include <linux/irq.h>
+#include <linux/irqdomain.h>
+#include <linux/of_platform.h>
+#include <asm/mach/arch.h>
+#include <asm/mach/time.h>
+#include <mach/common.h>
+#include <mach/mx53.h>
+
+/*
+ * Lookup table for attaching a specific name and platform_data pointer to
+ * devices as they get created by of_platform_populate(). Ideally this table
+ * would not exist, but the current clock implementation depends on some devices
+ * having a specific name.
+ */
+static const struct of_dev_auxdata imx53_auxdata_lookup[] __initconst = {
+ OF_DEV_AUXDATA("fsl,imx53-uart", MX53_UART1_BASE_ADDR, "imx21-uart.0", NULL),
+ OF_DEV_AUXDATA("fsl,imx53-uart", MX53_UART2_BASE_ADDR, "imx21-uart.1", NULL),
+ OF_DEV_AUXDATA("fsl,imx53-uart", MX53_UART3_BASE_ADDR, "imx21-uart.2", NULL),
+ OF_DEV_AUXDATA("fsl,imx53-uart", MX53_UART4_BASE_ADDR, "imx21-uart.3", NULL),
+ OF_DEV_AUXDATA("fsl,imx53-uart", MX53_UART5_BASE_ADDR, "imx21-uart.4", NULL),
+ OF_DEV_AUXDATA("fsl,imx53-fec", MX53_FEC_BASE_ADDR, "imx25-fec.0", NULL),
+ OF_DEV_AUXDATA("fsl,imx53-esdhc", MX53_ESDHC1_BASE_ADDR, "sdhci-esdhc-imx53.0", NULL),
+ OF_DEV_AUXDATA("fsl,imx53-esdhc", MX53_ESDHC2_BASE_ADDR, "sdhci-esdhc-imx53.1", NULL),
+ OF_DEV_AUXDATA("fsl,imx53-esdhc", MX53_ESDHC3_BASE_ADDR, "sdhci-esdhc-imx53.2", NULL),
+ OF_DEV_AUXDATA("fsl,imx53-esdhc", MX53_ESDHC4_BASE_ADDR, "sdhci-esdhc-imx53.3", NULL),
+ OF_DEV_AUXDATA("fsl,imx53-ecspi", MX53_ECSPI1_BASE_ADDR, "imx51-ecspi.0", NULL),
+ OF_DEV_AUXDATA("fsl,imx53-ecspi", MX53_ECSPI2_BASE_ADDR, "imx51-ecspi.1", NULL),
+ OF_DEV_AUXDATA("fsl,imx53-cspi", MX53_CSPI_BASE_ADDR, "imx35-cspi.0", NULL),
+ OF_DEV_AUXDATA("fsl,imx53-i2c", MX53_I2C1_BASE_ADDR, "imx-i2c.0", NULL),
+ OF_DEV_AUXDATA("fsl,imx53-i2c", MX53_I2C2_BASE_ADDR, "imx-i2c.1", NULL),
+ OF_DEV_AUXDATA("fsl,imx53-i2c", MX53_I2C3_BASE_ADDR, "imx-i2c.2", NULL),
+ OF_DEV_AUXDATA("fsl,imx53-sdma", MX53_SDMA_BASE_ADDR, "imx35-sdma", NULL),
+ OF_DEV_AUXDATA("fsl,imx53-wdt", MX53_WDOG1_BASE_ADDR, "imx2-wdt.0", NULL),
+ { /* sentinel */ }
+};
+
+static const struct of_device_id imx53_tzic_of_match[] __initconst = {
+ { .compatible = "fsl,imx53-tzic", },
+ { /* sentinel */ }
+};
+
+static const struct of_device_id imx53_gpio_of_match[] __initconst = {
+ { .compatible = "fsl,imx53-gpio", },
+ { /* sentinel */ }
+};
+
+static const struct of_device_id imx53_iomuxc_of_match[] __initconst = {
+ { .compatible = "fsl,imx53-iomuxc-ard", .data = imx53_ard_common_init, },
+ { .compatible = "fsl,imx53-iomuxc-evk", .data = imx53_evk_common_init, },
+ { .compatible = "fsl,imx53-iomuxc-qsb", .data = imx53_qsb_common_init, },
+ { .compatible = "fsl,imx53-iomuxc-smd", .data = imx53_smd_common_init, },
+ { /* sentinel */ }
+};
+
+static void __init imx53_dt_init(void)
+{
+ struct device_node *node;
+ const struct of_device_id *of_id;
+ void (*func)(void);
+ int gpio_irq = MXC_INTERNAL_IRQS + ARCH_NR_GPIOS;
+
+ node = of_find_matching_node(NULL, imx53_iomuxc_of_match);
+ if (node) {
+ of_id = of_match_node(imx53_iomuxc_of_match, node);
+ func = of_id->data;
+ func();
+ of_node_put(node);
+ }
+
+ irq_domain_generate_simple(imx53_tzic_of_match, MX53_TZIC_BASE_ADDR, 0);
+ gpio_irq -= 32;
+ irq_domain_generate_simple(imx53_gpio_of_match, MX53_GPIO1_BASE_ADDR, gpio_irq);
+ gpio_irq -= 32;
+ irq_domain_generate_simple(imx53_gpio_of_match, MX53_GPIO2_BASE_ADDR, gpio_irq);
+ gpio_irq -= 32;
+ irq_domain_generate_simple(imx53_gpio_of_match, MX53_GPIO3_BASE_ADDR, gpio_irq);
+ gpio_irq -= 32;
+ irq_domain_generate_simple(imx53_gpio_of_match, MX53_GPIO4_BASE_ADDR, gpio_irq);
+ gpio_irq -= 32;
+ irq_domain_generate_simple(imx53_gpio_of_match, MX53_GPIO5_BASE_ADDR, gpio_irq);
+ gpio_irq -= 32;
+ irq_domain_generate_simple(imx53_gpio_of_match, MX53_GPIO6_BASE_ADDR, gpio_irq);
+ gpio_irq -= 32;
+ irq_domain_generate_simple(imx53_gpio_of_match, MX53_GPIO7_BASE_ADDR, gpio_irq);
+
+ of_platform_populate(NULL, of_default_bus_match_table,
+ imx53_auxdata_lookup, NULL);
+}
+
+static void __init imx53_timer_init(void)
+{
+ mx53_clocks_init(32768, 24000000, 22579200, 0);
+}
+
+static struct sys_timer imx53_timer = {
+ .init = imx53_timer_init,
+};
+
+static const char *imx53_dt_board_compat[] __initdata = {
+ "fsl,imx53-ard",
+ "fsl,imx53-evk",
+ "fsl,imx53-qsb",
+ "fsl,imx53-smd",
+ NULL
+};
+
+DT_MACHINE_START(IMX53_DT, "Freescale i.MX53 (Device Tree Support)")
+ .map_io = mx53_map_io,
+ .init_early = imx53_init_early,
+ .init_irq = mx53_init_irq,
+ .timer = &imx53_timer,
+ .init_machine = imx53_dt_init,
+ .dt_compat = imx53_dt_board_compat,
+MACHINE_END
diff --git a/arch/arm/plat-mxc/include/mach/common.h b/arch/arm/plat-mxc/include/mach/common.h
index 4e3d978..96fc04d 100644
--- a/arch/arm/plat-mxc/include/mach/common.h
+++ b/arch/arm/plat-mxc/include/mach/common.h
@@ -72,4 +72,9 @@ extern void mxc_arch_reset_init(void __iomem *);
extern void mx51_efikamx_reset(void);
extern int mx53_revision(void);
extern int mx53_display_revision(void);
+extern void imx53_ard_common_init(void);
+extern void imx53_evk_common_init(void);
+extern void imx53_qsb_common_init(void);
+extern void imx53_smd_common_init(void);
+
#endif
--
Regards,
Shawn
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