diff options
| -rw-r--r-- | drivers/memory/tegra/tegra124-emc.c | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/drivers/memory/tegra/tegra124-emc.c b/drivers/memory/tegra/tegra124-emc.c index 900504c01a645..8620355776fe0 100644 --- a/drivers/memory/tegra/tegra124-emc.c +++ b/drivers/memory/tegra/tegra124-emc.c @@ -18,6 +18,7 @@ #include <linux/clk-provider.h> #include <linux/clk.h> #include <linux/clkdev.h> +#include <linux/debugfs.h> #include <linux/delay.h> #include <linux/of_address.h> #include <linux/of_platform.h> @@ -1005,6 +1006,50 @@ tegra_emc_find_node_by_ram_code(struct device_node *node, u32 ram_code) return NULL; } +/* Debugfs entry */ + +static int emc_debug_rate_get(void *data, u64 *rate) +{ + struct clk *c = data; + + *rate = clk_get_rate(c); + + return 0; +} + +static int emc_debug_rate_set(void *data, u64 rate) +{ + struct clk *c = data; + + return clk_set_rate(c, rate); +} + +DEFINE_SIMPLE_ATTRIBUTE(emc_debug_rate_fops, emc_debug_rate_get, + emc_debug_rate_set, "%lld\n"); + +static void emc_debugfs_init(struct device *dev) +{ + struct dentry *root, *file; + struct clk *clk; + + root = debugfs_create_dir("emc", NULL); + if (!root) { + dev_err(dev, "failed to create debugfs directory\n"); + return; + } + + clk = clk_get_sys("tegra-clk-debug", "emc"); + if (IS_ERR(clk)) { + dev_err(dev, "failed to get debug clock: %ld\n", PTR_ERR(clk)); + return; + } + + file = debugfs_create_file("rate", S_IRUGO | S_IWUSR, root, clk, + &emc_debug_rate_fops); + if (!file) + dev_err(dev, "failed to create debugfs entry\n"); +} + static int tegra_emc_probe(struct platform_device *pdev) { struct platform_device *mc; @@ -1073,6 +1118,9 @@ static int tegra_emc_probe(struct platform_device *pdev) platform_set_drvdata(pdev, emc); + if (IS_ENABLED(CONFIG_DEBUG_FS)) + emc_debugfs_init(&pdev->dev); + return 0; }; |