From: Mikko Perttunen <[email protected]> Will be very useful when tuning memory scaling.
Signed-off-by: Mikko Perttunen <[email protected]> Signed-off-by: Tomeu Vizoso <[email protected]> --- drivers/memory/tegra/tegra124-emc.c | 35 +++++++++++++++++++++++++++++++++++ 1 file changed, 35 insertions(+) diff --git a/drivers/memory/tegra/tegra124-emc.c b/drivers/memory/tegra/tegra124-emc.c index ffd9604..4157f52 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/module.h> #include <linux/of_address.h> @@ -1037,6 +1038,38 @@ static struct device_node *tegra_emc_find_node_by_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"); + +void emc_debugfs_init(void) +{ + struct dentry *d; + + d = debugfs_create_file("emc_rate", S_IRUGO | S_IWUSR, NULL, + clk_get_sys("tegra-clk-debug", "emc"), + &emc_debug_rate_fops); + if (!d) + pr_warn("failed to create debugfs entries\n"); +} + static int tegra_emc_probe(struct platform_device *pdev) { struct tegra_emc *tegra; @@ -1107,6 +1140,8 @@ static int tegra_emc_probe(struct platform_device *pdev) platform_set_drvdata(pdev, tegra); + emc_debugfs_init(); + return 0; }; -- 2.1.0 -- To unsubscribe from this list: send the line "unsubscribe linux-tegra" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
