Em Thu, 20 Nov 2014 16:55:23 +0100
Hans de Goede <hdego...@redhat.com> escreveu:
> On sun6i the cir block is attached to the reset controller, add support
> for de-asserting the reset if a reset controller is specified in dt.
>
> Signed-off-by: Hans de Goede <hdego...@redhat.com>
As this is meant to be merged via some other tree:
Acked-by: Mauro Carvalho Chehab <mche...@osg.samsung.com>
> ---
> drivers/media/rc/sunxi-cir.c | 25 +++++++++++++++++++++++--
> 1 file changed, 23 insertions(+), 2 deletions(-)
>
> 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 */
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