staging: nvec: use reset framework

Tegra's clock driver now provides an implementation of the common
reset API (include/linux/reset.h). Use this instead of the old Tegra-
specific API; that will soon be removed.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Marc Dietrich <marvin24@gmx.de>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Thierry Reding <treding@nvidia.com>

drivers/staging/nvec/nvec.c

@@ -36,7 +36,6 @@
 #include <linux/slab.h>
 #include <linux/spinlock.h>
 #include <linux/workqueue.h>
-#include <linux/clk/tegra.h>
 
 #include "nvec.h"
 
@@ -734,9 +733,9 @@ static void tegra_init_i2c_slave(struct nvec_chip *nvec)
 
 	clk_prepare_enable(nvec->i2c_clk);
 
-	tegra_periph_reset_assert(nvec->i2c_clk);
+	reset_control_assert(nvec->rst);
 	udelay(2);
-	tegra_periph_reset_deassert(nvec->i2c_clk);
+	reset_control_deassert(nvec->rst);
 
 	val = I2C_CNFG_NEW_MASTER_SFM | I2C_CNFG_PACKET_MODE_EN |
 	    (0x2 << I2C_CNFG_DEBOUNCE_CNT_SHIFT);
@@ -837,6 +836,12 @@ static int tegra_nvec_probe(struct platform_device *pdev)
 		return -ENODEV;
 	}
 
+	nvec->rst = devm_reset_control_get(&pdev->dev, "i2c");
+	if (IS_ERR(nvec->rst)) {
+		dev_err(nvec->dev, "failed to get controller reset\n");
+		return PTR_ERR(nvec->rst);
+	}
+
 	nvec->base = base;
 	nvec->irq = res->start;
 	nvec->i2c_clk = i2c_clk;

drivers/staging/nvec/nvec.h

@@ -23,6 +23,7 @@
 #include <linux/list.h>
 #include <linux/mutex.h>
 #include <linux/notifier.h>
+#include <linux/reset.h>
 #include <linux/spinlock.h>
 #include <linux/workqueue.h>
 
@@ -109,7 +110,8 @@ struct nvec_msg {
  * @irq: The IRQ of the I2C device
  * @i2c_addr: The address of the I2C slave
  * @base: The base of the memory mapped region of the I2C device
- * @clk: The clock of the I2C device
+ * @i2c_clk: The clock of the I2C device
+ * @rst: The reset of the I2C device
  * @notifier_list: Notifiers to be called on received messages, see
  *                 nvec_register_notifier()
  * @rx_data: Received messages that have to be processed
@@ -139,6 +141,7 @@ struct nvec_chip {
 	int i2c_addr;
 	void __iomem *base;
 	struct clk *i2c_clk;
+	struct reset_control *rst;
 	struct atomic_notifier_head notifier_list;
 	struct list_head rx_data, tx_data;
 	struct notifier_block nvec_status_notifier;