ASoC: Ux500: Move MSP pinctrl setup into the MSP driver

In the initial submission of the MSP driver msp1 and msp3's associated
pinctrl mechanism was passed back to platform code using a plat_init()
call-back routine, but it has no place in platform code. The MSP driver
should set this up for the appropriate ports. Instead we use a use_pinctrl
identifier which is passed from platform_data/Device Tree which indicates
which ports should use pinctrl.

Acked-by: Ola Lilja <ola.o.lilja@stericsson.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

2 files changed, 57 insertions, 18 deletions

diff --git a/sound/soc/ux500/ux500_msp_i2s.c b/sound/soc/ux500/ux500_msp_i2s.c
index eb85113..12d7f56 100644
--- a/sound/soc/ux500/ux500_msp_i2s.c
+++ b/sound/soc/ux500/ux500_msp_i2s.c
@@ -15,6 +15,7 @@
 
 #include <linux/module.h>
 #include <linux/platform_device.h>
+#include <linux/pinctrl/consumer.h>
 #include <linux/delay.h>
 #include <linux/slab.h>
 
@@ -25,6 +26,9 @@
 
 #include "ux500_msp_i2s.h"
 
+/* MSP1/3 Tx/Rx usage protection */
+static DEFINE_SPINLOCK(msp_rxtx_lock);
+
  /* Protocol desciptors */
 static const struct msp_protdesc prot_descs[] = {
 	{ /* I2S */
@@ -352,17 +356,23 @@ static int configure_multichannel(struct ux500_msp *msp,
 
 static int enable_msp(struct ux500_msp *msp, struct ux500_msp_config *config)
 {
-	int status = 0;
+	int status = 0, retval = 0;
 	u32 reg_val_DMACR, reg_val_GCR;
+	unsigned long flags;
 
 	/* Check msp state whether in RUN or CONFIGURED Mode */
-	if ((msp->msp_state == MSP_STATE_IDLE) && (msp->plat_init)) {
-		status = msp->plat_init();
-		if (status) {
-			dev_err(msp->dev, "%s: ERROR: Failed to init MSP (%d)!\n",
-				__func__, status);
-			return status;
+	if (msp->msp_state == MSP_STATE_IDLE) {
+		spin_lock_irqsave(&msp_rxtx_lock, flags);
+		if (msp->pinctrl_rxtx_ref == 0 &&
+			!(IS_ERR(msp->pinctrl_p) || IS_ERR(msp->pinctrl_def))) {
+			retval = pinctrl_select_state(msp->pinctrl_p,
+						msp->pinctrl_def);
+			if (retval)
+				pr_err("could not set MSP defstate\n");
 		}
+		if (!retval)
+			msp->pinctrl_rxtx_ref++;
+		spin_unlock_irqrestore(&msp_rxtx_lock, flags);
 	}
 
 	/* Configure msp with protocol dependent settings */
@@ -620,7 +630,8 @@ int ux500_msp_i2s_trigger(struct ux500_msp *msp, int cmd, int direction)
 
 int ux500_msp_i2s_close(struct ux500_msp *msp, unsigned int dir)
 {
-	int status = 0;
+	int status = 0, retval = 0;
+	unsigned long flags;
 
 	dev_dbg(msp->dev, "%s: Enter (dir = 0x%01x).\n", __func__, dir);
 
@@ -631,12 +642,19 @@ int ux500_msp_i2s_close(struct ux500_msp *msp, unsigned int dir)
 		writel((readl(msp->registers + MSP_GCR) &
 			       (~(FRAME_GEN_ENABLE | SRG_ENABLE))),
 			      msp->registers + MSP_GCR);
-		if (msp->plat_exit)
-			status = msp->plat_exit();
-			if (status)
-				dev_warn(msp->dev,
-					"%s: WARN: ux500_msp_i2s_exit failed (%d)!\n",
-					__func__, status);
+
+		spin_lock_irqsave(&msp_rxtx_lock, flags);
+		WARN_ON(!msp->pinctrl_rxtx_ref);
+		msp->pinctrl_rxtx_ref--;
+		if (msp->pinctrl_rxtx_ref == 0 &&
+			!(IS_ERR(msp->pinctrl_p) || IS_ERR(msp->pinctrl_sleep))) {
+			retval = pinctrl_select_state(msp->pinctrl_p,
+						msp->pinctrl_sleep);
+			if (retval)
+				pr_err("could not set MSP sleepstate\n");
+		}
+		spin_unlock_irqrestore(&msp_rxtx_lock, flags);
+
 		writel(0, msp->registers + MSP_GCR);
 		writel(0, msp->registers + MSP_TCF);
 		writel(0, msp->registers + MSP_RCF);
@@ -675,8 +693,6 @@ int ux500_msp_i2s_init_msp(struct platform_device *pdev,
 
 	msp->id = platform_data->id;
 	msp->dev = &pdev->dev;
-	msp->plat_init = platform_data->msp_i2s_init;
-	msp->plat_exit = platform_data->msp_i2s_exit;
 	msp->dma_cfg_rx = platform_data->msp_i2s_dma_rx;
 	msp->dma_cfg_tx = platform_data->msp_i2s_dma_tx;
 
@@ -713,6 +729,25 @@ int ux500_msp_i2s_init_msp(struct platform_device *pdev,
 	dev_dbg(&pdev->dev, "I2S device-name: '%s'\n", i2s_cont->name);
 	msp->i2s_cont = i2s_cont;
 
+	msp->pinctrl_p = pinctrl_get(msp->dev);
+	if (IS_ERR(msp->pinctrl_p))
+		dev_err(&pdev->dev, "could not get MSP pinctrl\n");
+	else {
+		msp->pinctrl_def = pinctrl_lookup_state(msp->pinctrl_p,
+						PINCTRL_STATE_DEFAULT);
+		if (IS_ERR(msp->pinctrl_def)) {
+			dev_err(&pdev->dev,
+				"could not get MSP defstate (%li)\n",
+				PTR_ERR(msp->pinctrl_def));
+		}
+		msp->pinctrl_sleep = pinctrl_lookup_state(msp->pinctrl_p,
+						PINCTRL_STATE_SLEEP);
+		if (IS_ERR(msp->pinctrl_sleep))
+			dev_err(&pdev->dev,
+				"could not get MSP idlestate (%li)\n",
+				PTR_ERR(msp->pinctrl_def));
+	}
+
 	return 0;
 }
 
diff --git a/sound/soc/ux500/ux500_msp_i2s.h b/sound/soc/ux500/ux500_msp_i2s.h
index 2d9136d..1311c0d 100644
--- a/sound/soc/ux500/ux500_msp_i2s.h
+++ b/sound/soc/ux500/ux500_msp_i2s.h
@@ -524,14 +524,18 @@ struct ux500_msp {
 	struct dma_chan *rx_pipeid;
 	enum msp_state msp_state;
 	int (*transfer) (struct ux500_msp *msp, struct i2s_message *message);
-	int (*plat_init) (void);
-	int (*plat_exit) (void);
 	struct timer_list notify_timer;
 	int def_elem_len;
 	unsigned int dir_busy;
 	int loopback_enable;
 	u32 backup_regs[MAX_MSP_BACKUP_REGS];
 	unsigned int f_bitclk;
+	/* Pin modes */
+	struct pinctrl *pinctrl_p;
+	struct pinctrl_state *pinctrl_def;
+	struct pinctrl_state *pinctrl_sleep;
+	/* Reference Count */
+	int pinctrl_rxtx_ref;
 };
 
 struct ux500_msp_dma_params {