serial: tegra: 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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Thierry Reding <treding@nvidia.com>

diff --git a/drivers/tty/serial/serial-tegra.c b/drivers/tty/serial/serial-tegra.c
index dfe79cc..4455481 100644 (file)
--- a/drivers/tty/serial/serial-tegra.c
+++ b/drivers/tty/serial/serial-tegra.c
@@ -34,6 +34,7 @@
 #include <linux/of_device.h>
 #include <linux/pagemap.h>
 #include <linux/platform_device.h>
+#include <linux/reset.h>
 #include <linux/serial.h>
 #include <linux/serial_8250.h>
 #include <linux/serial_core.h>
@@ -44,8 +45,6 @@
 #include <linux/tty.h>
 #include <linux/tty_flip.h>
 
-#include <linux/clk/tegra.h>
-
 #define TEGRA_UART_TYPE                                "TEGRA_UART"
 #define TX_EMPTY_STATUS                                (UART_LSR_TEMT | UART_LSR_THRE)
 #define BYTES_TO_ALIGN(x)                      ((unsigned long)(x) & 0x3)
@@ -103,6 +102,7 @@ struct tegra_uart_port {
        const struct tegra_uart_chip_data       *cdata;
 
        struct clk                              *uart_clk;
+       struct reset_control                    *rst;
        unsigned int                            current_baud;
 
        /* Register shadow */
@@ -832,9 +832,9 @@ static int tegra_uart_hw_init(struct tegra_uart_port *tup)
        clk_prepare_enable(tup->uart_clk);
 
        /* Reset the UART controller to clear all previous status.*/
-       tegra_periph_reset_assert(tup->uart_clk);
+       reset_control_assert(tup->rst);
        udelay(10);
-       tegra_periph_reset_deassert(tup->uart_clk);
+       reset_control_deassert(tup->rst);
 
        tup->rx_in_progress = 0;
        tup->tx_in_progress = 0;
@@ -1320,6 +1320,12 @@ static int tegra_uart_probe(struct platform_device *pdev)
                return PTR_ERR(tup->uart_clk);
        }
 
+       tup->rst = devm_reset_control_get(&pdev->dev, "serial");
+       if (IS_ERR(tup->rst)) {
+               dev_err(&pdev->dev, "Couldn't get the reset\n");
+               return PTR_ERR(tup->rst);
+       }
+
        u->iotype = UPIO_MEM32;
        u->irq = platform_get_irq(pdev, 0);
        u->regshift = 2;