spi: bcm2835aux: add driver stats to debugfs (8048d151) · Commits · 戴 / test

drivers/spi/spi-bcm2835aux.c

+56 −0

Original line number	Diff line number	Diff line
		@@ -21,6 +21,7 @@

		#include <linux/clk.h>
		#include <linux/completion.h>
		#include <linux/debugfs.h>
		#include <linux/delay.h>
		#include <linux/err.h>
		#include <linux/interrupt.h>
		@@ -104,8 +105,52 @@ struct bcm2835aux_spi {
		int tx_len;
		int rx_len;
		int pending;

		u64 count_transfer_polling;
		u64 count_transfer_irq;
		u64 count_transfer_irq_after_poll;

		struct dentry *debugfs_dir;
		};

		#if defined(CONFIG_DEBUG_FS)
		static void bcm2835aux_debugfs_create(struct bcm2835aux_spi *bs,
		const char *dname)
		{
		char name[64];
		struct dentry *dir;

		/* get full name */
		snprintf(name, sizeof(name), "spi-bcm2835aux-%s", dname);

		/* the base directory */
		dir = debugfs_create_dir(name, NULL);
		bs->debugfs_dir = dir;

		/* the counters */
		debugfs_create_u64("count_transfer_polling", 0444, dir,
		&bs->count_transfer_polling);
		debugfs_create_u64("count_transfer_irq", 0444, dir,
		&bs->count_transfer_irq);
		debugfs_create_u64("count_transfer_irq_after_poll", 0444, dir,
		&bs->count_transfer_irq_after_poll);
		}

		static void bcm2835aux_debugfs_remove(struct bcm2835aux_spi *bs)
		{
		debugfs_remove_recursive(bs->debugfs_dir);
		bs->debugfs_dir = NULL;
		}
		#else
		static void bcm2835aux_debugfs_create(struct bcm2835aux_spi *bs)
		{
		}

		static void bcm2835aux_debugfs_remove(struct bcm2835aux_spi *bs)
		{
		}
		#endif /* CONFIG_DEBUG_FS */

		static inline u32 bcm2835aux_rd(struct bcm2835aux_spi *bs, unsigned reg)
		{
		return readl(bs->regs + reg);
		@@ -244,6 +289,9 @@ static int bcm2835aux_spi_transfer_one_irq(struct spi_master *master,
		{
		struct bcm2835aux_spi *bs = spi_master_get_devdata(master);

		/* update statistics */
		bs->count_transfer_irq++;

		/* fill in registers and fifos before enabling interrupts */
		bcm2835aux_wr(bs, BCM2835_AUX_SPI_CNTL1, bs->cntl[1]);
		bcm2835aux_wr(bs, BCM2835_AUX_SPI_CNTL0, bs->cntl[0]);
		@@ -267,6 +315,9 @@ static int bcm2835aux_spi_transfer_one_poll(struct spi_master *master,
		struct bcm2835aux_spi *bs = spi_master_get_devdata(master);
		unsigned long timeout;

		/* update statistics */
		bs->count_transfer_polling++;

		/* configure spi */
		bcm2835aux_wr(bs, BCM2835_AUX_SPI_CNTL1, bs->cntl[1]);
		bcm2835aux_wr(bs, BCM2835_AUX_SPI_CNTL0, bs->cntl[0]);
		@@ -287,6 +338,7 @@ static int bcm2835aux_spi_transfer_one_poll(struct spi_master *master,
		jiffies - timeout,
		bs->tx_len, bs->rx_len);
		/* forward to interrupt handler */
		bs->count_transfer_irq_after_poll++;
		return __bcm2835aux_spi_transfer_one_irq(master,
		spi, tfr);
		}
		@@ -536,6 +588,8 @@ static int bcm2835aux_spi_probe(struct platform_device *pdev)
		goto out_clk_disable;
		}

		bcm2835aux_debugfs_create(bs, dev_name(&pdev->dev));

		return 0;

		out_clk_disable:
		@@ -550,6 +604,8 @@ static int bcm2835aux_spi_remove(struct platform_device *pdev)
		struct spi_master *master = platform_get_drvdata(pdev);
		struct bcm2835aux_spi *bs = spi_master_get_devdata(master);

		bcm2835aux_debugfs_remove(bs);

		bcm2835aux_spi_reset_hw(bs);

		/* disable the HW block by releasing the clock */

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