[linux-sunxi] [PATCH 4/9] rc: sunxi-cir: Add support for an optional reset controller

diff --git a/drivers/media/rc/sunxi-cir.c b/drivers/media/rc/sunxi-cir.c
index bcee8e1..895fb65 100644
--- a/drivers/media/rc/sunxi-cir.c
+++ b/drivers/media/rc/sunxi-cir.c

@@ -23,6 +23,7 @@
 #include <linux/interrupt.h>
 #include <linux/module.h>
 #include <linux/of_platform.h>
+#include <linux/reset.h>
 #include <media/rc-core.h>

 #define SUNXI_IR_DEV "sunxi-ir"

@@ -95,6 +96,7 @@ struct sunxi_ir {
        int             irq;
        struct clk      *clk;
        struct clk      *apb_clk;
+       struct reset_control *rst;
        const char      *map_name;
 };

@@ -166,15 +168,29 @@ static int sunxi_ir_probe(struct platform_device *pdev)
                return PTR_ERR(ir->clk);
        }

+       /* Reset (optional) */
+       ir->rst = devm_reset_control_get_optional(dev, NULL);
+       if (IS_ERR(ir->rst)) {
+               ret = PTR_ERR(ir->rst);
+               if (ret == -EPROBE_DEFER)
+                       return ret;
+               ir->rst = NULL;
+       } else {
+               ret = reset_control_deassert(ir->rst);
+               if (ret)
+                       return ret;
+       }
+
        ret = clk_set_rate(ir->clk, SUNXI_IR_BASE_CLK);
        if (ret) {
                dev_err(dev, "set ir base clock failed!\n");
-               return ret;
+               goto exit_reset_assert;
        }

        if (clk_prepare_enable(ir->apb_clk)) {
                dev_err(dev, "try to enable apb_ir_clk failed\n");
-               return -EINVAL;
+               ret = -EINVAL;
+               goto exit_reset_assert;
        }

        if (clk_prepare_enable(ir->clk)) {

@@ -271,6 +287,9 @@ exit_clkdisable_clk:
        clk_disable_unprepare(ir->clk);
 exit_clkdisable_apb_clk:
        clk_disable_unprepare(ir->apb_clk);
+exit_reset_assert:
+       if (ir->rst)
+               reset_control_assert(ir->rst);

        return ret;
 }

@@ -282,6 +301,8 @@ static int sunxi_ir_remove(struct platform_device *pdev)

        clk_disable_unprepare(ir->clk);
        clk_disable_unprepare(ir->apb_clk);
+       if (ir->rst)
+               reset_control_assert(ir->rst);

        spin_lock_irqsave(&ir->ir_lock, flags);
        /* disable IR IRQ */
--

2.1.0

--
You received this message because you are subscribed to the Google Groups "linux-sunxi" group.
To unsubscribe from this group and stop receiving emails from it, send an email to linux-sunxi+unsubscribe at googlegroups.com.
For more options, visit https://groups.google.com/d/optout.