| b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [diff] [blame] | 1 | From f34c01773d5dbd2db04200079bb4d32ecb0cd847 Mon Sep 17 00:00:00 2001 |
| 2 | From: Roy Pledge <roy.pledge@nxp.com> |
| 3 | Date: Tue, 18 Feb 2020 14:02:21 -0500 |
| 4 | Subject: [PATCH] sdk_qbman: Only create debugfs entries when QBMan is part of |
| 5 | device tree |
| 6 | |
| 7 | Only create debugfs entries if the QBMan nodes exist in the device |
| 8 | tree. |
| 9 | |
| 10 | Signed-off-by: Roy Pledge <roy.pledge@nxp.com> |
| 11 | Acked-by: Madalin Bucur <madalin.bucur@nxp.com> |
| 12 | Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com> |
| 13 | --- |
| 14 | drivers/staging/fsl_qbman/bman_debugfs.c | 8 +++++++- |
| 15 | drivers/staging/fsl_qbman/qman_debugfs.c | 17 ++++++++++------- |
| 16 | 2 files changed, 17 insertions(+), 8 deletions(-) |
| 17 | |
| 18 | --- a/drivers/staging/fsl_qbman/bman_debugfs.c |
| 19 | +++ b/drivers/staging/fsl_qbman/bman_debugfs.c |
| 20 | @@ -33,6 +33,7 @@ |
| 21 | #include <linux/debugfs.h> |
| 22 | #include <linux/seq_file.h> |
| 23 | #include <linux/uaccess.h> |
| 24 | +#include <linux/of.h> |
| 25 | |
| 26 | static struct dentry *dfs_root; /* debugfs root directory */ |
| 27 | |
| 28 | @@ -83,9 +84,14 @@ static int __init bman_debugfs_module_in |
| 29 | { |
| 30 | int ret = 0; |
| 31 | struct dentry *d; |
| 32 | + struct device_node *dn; |
| 33 | |
| 34 | + dn = of_find_compatible_node(NULL, NULL, "fsl,bman"); |
| 35 | + if (!dn) { |
| 36 | + pr_debug("No fsl,bman node\n"); |
| 37 | + return 0; |
| 38 | + } |
| 39 | dfs_root = debugfs_create_dir("bman", NULL); |
| 40 | - |
| 41 | if (dfs_root == NULL) { |
| 42 | ret = -ENOMEM; |
| 43 | pr_err("Cannot create bman debugfs dir\n"); |
| 44 | --- a/drivers/staging/fsl_qbman/qman_debugfs.c |
| 45 | +++ b/drivers/staging/fsl_qbman/qman_debugfs.c |
| 46 | @@ -1457,13 +1457,16 @@ static int __init qman_debugfs_module_in |
| 47 | |
| 48 | fqid_max = 0; |
| 49 | init_ccsrmempeek(); |
| 50 | - if (qman_ccsr_start) { |
| 51 | - if (!qman_ccsrmempeek(®, QM_FQD_AR)) { |
| 52 | - /* extract the size of the FQD window */ |
| 53 | - reg = reg & 0x3f; |
| 54 | - /* calculate valid frame queue descriptor range */ |
| 55 | - fqid_max = (1 << (reg + 1)) / QM_FQD_BLOCK_SIZE; |
| 56 | - } |
| 57 | + if (!qman_ccsr_start) { |
| 58 | + /* No QMan node found in device tree */ |
| 59 | + return 0; |
| 60 | + } |
| 61 | + |
| 62 | + if (!qman_ccsrmempeek(®, QM_FQD_AR)) { |
| 63 | + /* extract the size of the FQD window */ |
| 64 | + reg = reg & 0x3f; |
| 65 | + /* calculate valid frame queue descriptor range */ |
| 66 | + fqid_max = (1 << (reg + 1)) / QM_FQD_BLOCK_SIZE; |
| 67 | } |
| 68 | dfs_root = debugfs_create_dir("qman", NULL); |
| 69 | fqd_root = debugfs_create_dir("fqd", dfs_root); |