@@ -11,7 +11,7 @@ obj-y := id.o io.o control.o mux.o devices.o fb.o serial.o timer.o pm.o \
omap_device.o sram.o drm.o
hwmod-common = omap_hwmod.o omap_hwmod_reset.o \
- omap_hwmod_common_data.o
+ omap_hwmod_common_data.o omap_hwmod_debugfs.o
clock-common = clock.o clock_common_data.o \
clkt_dpll.o clkt_clksel.o
secure-common = omap-smc.o omap-secure.o
@@ -3314,6 +3314,7 @@ static int __init omap_hwmod_setup_all(void)
omap_hwmod_for_each(_init, NULL);
omap_hwmod_for_each(_setup, NULL);
+ omap_hwmod_debug_init();
return 0;
}
@@ -768,4 +768,10 @@ int am43xx_hwmod_init(void);
extern int __init omap_hwmod_register_links(struct omap_hwmod_ocp_if **ois);
+#if IS_ENABLED(CONFIG_DEBUG_FS)
+extern int __init omap_hwmod_debug_init(void);
+#else
+static inline int __int omap_hwmod_debug_init(void) { return 0; }
+#endif
+
#endif
new file mode 100644
@@ -0,0 +1,280 @@
+/*
+ * omap_hwmod debugfs view
+ *
+ * Copyright (C) 2014 Texas Instruments, Incorporated - http://www.ti.com
+ * Author: Felipe Balbi <balbi@ti.com>
+ *
+ * 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.
+ */
+#undef DEBUG
+
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/io.h>
+#include <linux/err.h>
+#include <linux/fs.h>
+#include <linux/list.h>
+#include <linux/mutex.h>
+#include <linux/spinlock.h>
+#include <linux/debugfs.h>
+#include <linux/seq_file.h>
+
+#include "clock.h"
+#include "omap_hwmod.h"
+
+#include "soc.h"
+#include "common.h"
+#include "clockdomain.h"
+#include "powerdomain.h"
+#include "cm2xxx.h"
+#include "cm3xxx.h"
+#include "cm33xx.h"
+#include "prm.h"
+#include "prm3xxx.h"
+#include "prm44xx.h"
+#include "prm33xx.h"
+#include "prminst44xx.h"
+#include "mux.h"
+#include "pm.h"
+
+#if IS_ENABLED(CONFIG_DEBUG_FS)
+static int __init omap_hwmod_create_files(struct omap_hwmod *oh,
+ struct dentry *dir)
+{
+ struct dentry *file;
+
+ file = debugfs_create_u16("flags", S_IRUGO, dir, &oh->flags);
+ if (!file)
+ return -ENOMEM;
+
+ file = debugfs_create_u8("mpu_rt_idx", S_IRUGO, dir, &oh->mpu_rt_idx);
+ if (!file)
+ return -ENOMEM;
+
+ file = debugfs_create_u8("response_lat", S_IRUGO, dir,
+ &oh->response_lat);
+ if (!file)
+ return -ENOMEM;
+
+ file = debugfs_create_u8("rst_lines_cnt", S_IRUGO, dir,
+ &oh->rst_lines_cnt);
+ if (!file)
+ return -ENOMEM;
+
+ file = debugfs_create_u8("opt_clks_cnt", S_IRUGO, dir,
+ &oh->opt_clks_cnt);
+ if (!file)
+ return -ENOMEM;
+
+ file = debugfs_create_u8("masters_cnt", S_IRUGO, dir, &oh->masters_cnt);
+ if (!file)
+ return -ENOMEM;
+
+ file = debugfs_create_u8("slaves_cnt", S_IRUGO, dir, &oh->slaves_cnt);
+ if (!file)
+ return -ENOMEM;
+
+ file = debugfs_create_u8("hwmods_cnt", S_IRUGO, dir, &oh->hwmods_cnt);
+ if (!file)
+ return -ENOMEM;
+
+ file = debugfs_create_u8("_int_flags", S_IRUGO, dir, &oh->_int_flags);
+ if (!file)
+ return -ENOMEM;
+
+ file = debugfs_create_u8("_state", S_IRUGO, dir, &oh->_state);
+ if (!file)
+ return -ENOMEM;
+
+ file = debugfs_create_u8("_postsetup_state", S_IRUGO, dir,
+ &oh->_postsetup_state);
+ if (!file)
+ return -ENOMEM;
+
+ return 0;
+}
+
+static int __init
+omap_hwmod_create_sysc_files(struct omap_hwmod_class_sysconfig *sysc, struct
+ dentry *dir)
+{
+ struct dentry *subdir;
+ struct dentry *file;
+
+ if (!sysc)
+ return 0;
+
+ subdir = debugfs_create_dir("sysc", dir);
+ if (!subdir)
+ return -ENOMEM;
+
+ file = debugfs_create_x32("rev_offs", S_IRUGO, subdir,
+ &sysc->rev_offs);
+ if (!file)
+ return -ENOMEM;
+
+ file = debugfs_create_x32("sysc_offs", S_IRUGO, subdir,
+ &sysc->sysc_offs);
+ if (!file)
+ return -ENOMEM;
+
+ file = debugfs_create_x32("syss_offs", S_IRUGO, subdir,
+ &sysc->syss_offs);
+ if (!file)
+ return -ENOMEM;
+
+ file = debugfs_create_x16("sysc_flags", S_IRUGO, subdir,
+ &sysc->sysc_flags);
+ if (!file)
+ return -ENOMEM;
+
+ file = debugfs_create_u8("srst_udelay", S_IRUGO, subdir,
+ &sysc->srst_udelay);
+ if (!file)
+ return -ENOMEM;
+
+ file = debugfs_create_x8("idlemodes", S_IRUGO, subdir, &sysc->idlemodes);
+ if (!file)
+ return -ENOMEM;
+
+ file = debugfs_create_u8("clockact", S_IRUGO, subdir, &sysc->clockact);
+ if (!file)
+ return -ENOMEM;
+
+ return 0;
+}
+
+static int __init omap_hwmod_create_class_files(struct omap_hwmod_class *class,
+ struct dentry *dir)
+{
+ struct dentry *subdir;
+ struct dentry *file;
+ int ret;
+
+ if (!class)
+ return 0;
+
+ subdir = debugfs_create_dir("class", dir);
+ if (!subdir)
+ return -ENOMEM;
+
+ file = debugfs_create_u32("rev", S_IRUGO, subdir, &class->rev);
+ if (!file)
+ return -ENOMEM;
+
+ ret = omap_hwmod_create_sysc_files(class->sysc, subdir);
+ if (ret)
+ return -ENOMEM;
+
+ return 0;
+}
+
+static int __init omap_hwmod_create_irq_files(struct omap_hwmod_irq_info *irqs,
+ struct dentry *dir)
+{
+ struct dentry *subdir;
+ int i = 0;
+
+ if (!irqs)
+ return 0;
+
+ subdir = debugfs_create_dir("irqs", dir);
+ if (!subdir)
+ return -ENOMEM;
+
+ while (irqs[i].irq != -1) {
+ struct dentry *file;
+
+ file = debugfs_create_u16(irqs[i].name, S_IRUGO, subdir,
+ &irqs[i].irq);
+ if (!file)
+ return -ENOMEM;
+ i++;
+ }
+
+ return 0;
+}
+
+static int __init omap_hwmod_create_dma_files(struct omap_hwmod_dma_info *dmas,
+ struct dentry *dir)
+{
+ struct dentry *subdir;
+ int i = 0;
+
+ if (!dmas)
+ return 0;
+
+ subdir = debugfs_create_dir("dmas", dir);
+ if (!subdir)
+ return -ENOMEM;
+
+ while (dmas[i].dma_req != -1) {
+ struct dentry *file;
+
+ file = debugfs_create_u16(dmas[i].name, S_IRUGO, subdir,
+ &dmas[i].dma_req);
+ if (!file)
+ return -ENOMEM;
+ i++;
+ }
+
+ return 0;
+}
+
+static int __init omap_hwmod_debugfs_create_subdir(struct omap_hwmod *oh,
+ void *data)
+{
+ struct dentry *root = data;
+ struct dentry *dir;
+ int ret;
+
+ dir = debugfs_create_dir(oh->name, root);
+ if (!dir)
+ return -ENOMEM;
+
+ ret = omap_hwmod_create_files(oh, dir);
+ if (ret)
+ return ret;
+
+ ret = omap_hwmod_create_class_files(oh->class, dir);
+ if (ret)
+ return ret;
+
+ ret = omap_hwmod_create_irq_files(oh->mpu_irqs, dir);
+ if (ret)
+ return ret;
+
+ ret = omap_hwmod_create_dma_files(oh->sdma_reqs, dir);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static int __init omap_hwmod_debugfs_create_subdirs(struct dentry *root)
+{
+ return omap_hwmod_for_each(omap_hwmod_debugfs_create_subdir, root);
+}
+
+int __init omap_hwmod_debug_init(void)
+{
+ struct dentry *root;
+ int ret;
+
+ root = debugfs_create_dir("omap_hwmod", NULL);
+ if (!root) {
+ pr_debug("omap_hwmod: unable to initialize debugfs\n");
+ return 0;
+ }
+
+ ret = omap_hwmod_debugfs_create_subdirs(root);
+ if (ret < 0) {
+ pr_debug("omap_hwmod: unable to initialize debugfs\n");
+ debugfs_remove_recursive(root);
+ }
+
+ return ret;
+}
+#endif
By exposing the details of hwmod structures to debugfs we can much more easily verify that changes to hwmod data is correct and won't cause regressions. The idea is that this can be used to check the state of one hwmod, verify hwmod sysc fields, etc. For example, this will be used to move some of the sysc fields to DT and later verify that they are correct pre- and post-patch. Signed-off-by: Felipe Balbi <balbi@ti.com> --- The idea behind this is that I'll be moving some more of hwmod data to DT and this will help diff pre- and post-patch boots to see if data remained the same. Tested with AM437x SK, logs here: http://hastebin.com/ukahuvipiz arch/arm/mach-omap2/Makefile | 2 +- arch/arm/mach-omap2/omap_hwmod.c | 1 + arch/arm/mach-omap2/omap_hwmod.h | 6 + arch/arm/mach-omap2/omap_hwmod_debugfs.c | 280 +++++++++++++++++++++++++++++++ 4 files changed, 288 insertions(+), 1 deletion(-) create mode 100644 arch/arm/mach-omap2/omap_hwmod_debugfs.c