drivers/ptp/ptp_qoriq_debugfs.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /* Copyright 2019 NXP
   3  */
   4 #include <linux/device.h>
   5 #include <linux/debugfs.h>
   6 #include <linux/fsl/ptp_qoriq.h>
   7
   8 static int ptp_qoriq_fiper1_lpbk_get(void *data, u64 *val)
   9 {
  10         struct ptp_qoriq *ptp_qoriq = data;
  11         struct ptp_qoriq_registers *regs = &ptp_qoriq->regs;
  12         u32 ctrl;
  13
  14         ctrl = ptp_qoriq->read(&regs->ctrl_regs->tmr_ctrl);
  15         *val = ctrl & PP1L ? 1 : 0;
  16
  17         return 0;
  18 }
  19
  20 static int ptp_qoriq_fiper1_lpbk_set(void *data, u64 val)
  21 {
  22         struct ptp_qoriq *ptp_qoriq = data;
  23         struct ptp_qoriq_registers *regs = &ptp_qoriq->regs;
  24         u32 ctrl;
  25
  26         ctrl = ptp_qoriq->read(&regs->ctrl_regs->tmr_ctrl);
  27         if (val == 0)
  28                 ctrl &= ~PP1L;
  29         else
  30                 ctrl |= PP1L;
  31
  32         ptp_qoriq->write(&regs->ctrl_regs->tmr_ctrl, ctrl);
  33         return 0;
  34 }
  35
  36 DEFINE_DEBUGFS_ATTRIBUTE(ptp_qoriq_fiper1_fops, ptp_qoriq_fiper1_lpbk_get,
  37                          ptp_qoriq_fiper1_lpbk_set, "%llu\n");
  38
  39 static int ptp_qoriq_fiper2_lpbk_get(void *data, u64 *val)
  40 {
  41         struct ptp_qoriq *ptp_qoriq = data;
  42         struct ptp_qoriq_registers *regs = &ptp_qoriq->regs;
  43         u32 ctrl;
  44
  45         ctrl = ptp_qoriq->read(&regs->ctrl_regs->tmr_ctrl);
  46         *val = ctrl & PP2L ? 1 : 0;
  47
  48         return 0;
  49 }
  50
  51 static int ptp_qoriq_fiper2_lpbk_set(void *data, u64 val)
  52 {
  53         struct ptp_qoriq *ptp_qoriq = data;
  54         struct ptp_qoriq_registers *regs = &ptp_qoriq->regs;
  55         u32 ctrl;
  56
  57         ctrl = ptp_qoriq->read(&regs->ctrl_regs->tmr_ctrl);
  58         if (val == 0)
  59                 ctrl &= ~PP2L;
  60         else
  61                 ctrl |= PP2L;
  62
  63         ptp_qoriq->write(&regs->ctrl_regs->tmr_ctrl, ctrl);
  64         return 0;
  65 }
  66
  67 DEFINE_DEBUGFS_ATTRIBUTE(ptp_qoriq_fiper2_fops, ptp_qoriq_fiper2_lpbk_get,
  68                          ptp_qoriq_fiper2_lpbk_set, "%llu\n");
  69
  70 void ptp_qoriq_create_debugfs(struct ptp_qoriq *ptp_qoriq)
  71 {
  72         struct dentry *root;
  73
  74         root = debugfs_create_dir(dev_name(ptp_qoriq->dev), NULL);
  75         if (IS_ERR(root))
  76                 return;
  77         if (!root)
  78                 goto err_root;
  79
  80         ptp_qoriq->debugfs_root = root;
  81
  82         if (!debugfs_create_file_unsafe("fiper1-loopback", 0600, root,
  83                                         ptp_qoriq, &ptp_qoriq_fiper1_fops))
  84                 goto err_node;
  85         if (!debugfs_create_file_unsafe("fiper2-loopback", 0600, root,
  86                                         ptp_qoriq, &ptp_qoriq_fiper2_fops))
  87                 goto err_node;
  88         return;
  89
  90 err_node:
  91         debugfs_remove_recursive(root);
  92         ptp_qoriq->debugfs_root = NULL;
  93 err_root:
  94         dev_err(ptp_qoriq->dev, "failed to initialize debugfs\n");
  95 }
  96
  97 void ptp_qoriq_remove_debugfs(struct ptp_qoriq *ptp_qoriq)
  98 {
  99         debugfs_remove_recursive(ptp_qoriq->debugfs_root);
 100         ptp_qoriq->debugfs_root = NULL;
 101 }