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Commit 30a636f9 authored by Thierry Reding's avatar Thierry Reding
Browse files

memory: tegra: Expose supported rates via debugfs 



In order to ease testing, expose the list of supported EMC frequencies
via debugfs.

Reviewed-by: default avatarTomeu Vizoso <tomeu.vizoso@collabora.com>
Signed-off-by: default avatarThierry Reding <treding@nvidia.com>
parent d770e558

drivers/memory/tegra/tegra124-emc.c

+40 −2
Original line number Diff line number Diff line
@@ -1027,7 +1027,40 @@ static int emc_debug_rate_set(void *data, u64 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)

static int emc_debug_supported_rates_show(struct seq_file *s, void *data)

{

	struct tegra_emc *emc = s->private;

	const char *prefix = "";

	unsigned int i;



	for (i = 0; i < emc->num_timings; i++) {

		struct emc_timing *timing = &emc->timings[i];



		seq_printf(s, "%s%lu", prefix, timing->rate);



		prefix = " ";

	}



	seq_puts(s, "\n");



	return 0;

}



static int emc_debug_supported_rates_open(struct inode *inode,

					  struct file *file)

{

	return single_open(file, emc_debug_supported_rates_show,

			   inode->i_private);

}



static const struct file_operations emc_debug_supported_rates_fops = {

	.open = emc_debug_supported_rates_open,

	.read = seq_read,

	.llseek = seq_lseek,

	.release = single_release,

};



static void emc_debugfs_init(struct device *dev, struct tegra_emc *emc)

{

	struct dentry *root, *file;

	struct clk *clk;
@@ -1048,6 +1081,11 @@ static void emc_debugfs_init(struct device *dev) 
				   &emc_debug_rate_fops);

	if (!file)

		dev_err(dev, "failed to create debugfs entry\n");



	file = debugfs_create_file("supported_rates", S_IRUGO, root, emc,

				   &emc_debug_supported_rates_fops);

	if (!file)

		dev_err(dev, "failed to create debugfs entry\n");

}



static int tegra_emc_probe(struct platform_device *pdev)
@@ -1119,7 +1157,7 @@ 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);

		emc_debugfs_init(&pdev->dev, emc);



	return 0;

};