linux-kernel - [PATCH v3 4/4] mmc: omap_hsmmc: debugfs entries for SDIO IRQ detection and GPIO remuxing.

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Message-Id: <1380971830-21492-5-git-send-email-afenkart@gmail.com>
Date:	Sat,  5 Oct 2013 13:17:10 +0200
From:	Andreas Fenkart <afenkart@...il.com>
To:	Chris Ball <cjb@...top.org>
Cc:	Tony Lindgren <tony@...mide.com>,
	Grant Likely <grant.likely@...retlab.ca>,
	Felipe Balbi <balbi@...com>, Venkatraman S <svenkatr@...com>,
	Balaji T K <balajitk@...com>, zonque@...il.com,
	devicetree-discuss@...ts.ozlabs.org, devicetree@...r.kernel.org,
	linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-mmc@...r.kernel.org,
	linux-omap@...r.kernel.org, Andreas Fenkart <afenkart@...il.com>
Subject: [PATCH v3 4/4] mmc: omap_hsmmc: debugfs entries for SDIO IRQ detection and GPIO remuxing.

Update the debugfs related code for the SDIO IRQ support.
Note that PSTATE shows current state of data lines, incl.
SDIO IRQ pending

Signed-off-by: Andreas Fenkart <afenkart@...il.com>

diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c
index a8894ee..f7fe06f 100644
--- a/drivers/mmc/host/omap_hsmmc.c
+++ b/drivers/mmc/host/omap_hsmmc.c
@@ -81,6 +81,7 @@ static void apply_clk_hack(struct device *dev)
 #define OMAP_HSMMC_RSP54	0x0118
 #define OMAP_HSMMC_RSP76	0x011C
 #define OMAP_HSMMC_DATA		0x0120
+#define OMAP_HSMMC_PSTATE	0x0124
 #define OMAP_HSMMC_HCTL		0x0128
 #define OMAP_HSMMC_SYSCTL	0x012C
 #define OMAP_HSMMC_STAT		0x0130
@@ -1812,6 +1813,22 @@ static int omap_hsmmc_regs_show(struct seq_file *s, void *data)
 {
 	struct mmc_host *mmc = s->private;
 	struct omap_hsmmc_host *host = mmc_priv(mmc);
+	unsigned long flags;
+
+	spin_lock_irqsave(&host->irq_lock, flags);
+	seq_puts(s, "\n");
+	seq_printf(s, "sdio irq\t%s\n", ((host->flags & HSMMC_SDIO_IRQ_ENABLED)
+					 ? "enabled" : "disabled"));
+	if (host->flags & HSMMC_SWAKEUP_QUIRK) {
+		seq_printf(s, "pinmux config\t%s\n", ((host->flags &
+						       HSMMC_RUNTIME_SUSPENDED)
+						      ?  "gpio" : "sdio"));
+		if (host->flags & HSMMC_RUNTIME_SUSPENDED)
+			seq_printf(s, "sdio irq pin\t%s\n",
+				   gpio_get_value(mmc_slot(host).gpio_cirq) ?
+				   "high" : "low");
+	}
+	spin_unlock_irqrestore(&host->irq_lock, flags);
 
 	if (host->suspended) {
 		seq_printf(s, "host suspended, can't read registers\n");
@@ -1819,9 +1836,11 @@ static int omap_hsmmc_regs_show(struct seq_file *s, void *data)
 	}
 
 	pm_runtime_get_sync(host->dev);
-
+	seq_puts(s, "\nregs:\n");
 	seq_printf(s, "CON:\t\t0x%08x\n",
 			OMAP_HSMMC_READ(host->base, CON));
+	seq_printf(s, "PSTATE:\t\t0x%08x\n",
+		   OMAP_HSMMC_READ(host->base, PSTATE));
 	seq_printf(s, "HCTL:\t\t0x%08x\n",
 			OMAP_HSMMC_READ(host->base, HCTL));
 	seq_printf(s, "SYSCTL:\t\t0x%08x\n",
-- 
1.7.10.4

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