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SubjectRe: [PATCH v7 1/4] remoteproc/davinci: use the reset framework
2018-06-21 9:37 GMT+02:00 Bartosz Golaszewski <brgl@bgdev.pl>:
> From: Bartosz Golaszewski <bgolaszewski@baylibre.com>
>
> Switch to using the reset framework instead of handcoded reset routines
> we used so far.
>
> Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
> Reviewed-by: Sekhar Nori <nsekhar@ti.com>
> Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de>
> ---
> drivers/remoteproc/da8xx_remoteproc.c | 34 +++++++++++++++++++++++----
> 1 file changed, 29 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/remoteproc/da8xx_remoteproc.c b/drivers/remoteproc/da8xx_remoteproc.c
> index b668e32996e2..76c06b70a1c6 100644
> --- a/drivers/remoteproc/da8xx_remoteproc.c
> +++ b/drivers/remoteproc/da8xx_remoteproc.c
> @@ -10,6 +10,7 @@
>
> #include <linux/bitops.h>
> #include <linux/clk.h>
> +#include <linux/reset.h>
> #include <linux/err.h>
> #include <linux/interrupt.h>
> #include <linux/io.h>
> @@ -20,8 +21,6 @@
> #include <linux/platform_device.h>
> #include <linux/remoteproc.h>
>
> -#include <mach/clock.h> /* for davinci_clk_reset_assert/deassert() */
> -
> #include "remoteproc_internal.h"
>
> static char *da8xx_fw_name;
> @@ -72,6 +71,7 @@ struct da8xx_rproc {
> struct da8xx_rproc_mem *mem;
> int num_mems;
> struct clk *dsp_clk;
> + struct reset_control *dsp_reset;
> void (*ack_fxn)(struct irq_data *data);
> struct irq_data *irq_data;
> void __iomem *chipsig;
> @@ -138,6 +138,7 @@ static int da8xx_rproc_start(struct rproc *rproc)
> struct device *dev = rproc->dev.parent;
> struct da8xx_rproc *drproc = (struct da8xx_rproc *)rproc->priv;
> struct clk *dsp_clk = drproc->dsp_clk;
> + struct reset_control *dsp_reset = drproc->dsp_reset;
> int ret;
>
> /* hw requires the start (boot) address be on 1KB boundary */
> @@ -155,7 +156,12 @@ static int da8xx_rproc_start(struct rproc *rproc)
> return ret;
> }
>
> - davinci_clk_reset_deassert(dsp_clk);
> + ret = reset_control_deassert(dsp_reset);
> + if (ret) {
> + dev_err(dev, "reset_control_deassert() failed: %d\n", ret);
> + clk_disable_unprepare(dsp_clk);
> + return ret;
> + }
>
> return 0;
> }
> @@ -163,8 +169,15 @@ static int da8xx_rproc_start(struct rproc *rproc)
> static int da8xx_rproc_stop(struct rproc *rproc)
> {
> struct da8xx_rproc *drproc = rproc->priv;
> + struct device *dev = rproc->dev.parent;
> + int ret;
> +
> + ret = reset_control_assert(drproc->dsp_reset);
> + if (ret) {
> + dev_err(dev, "reset_control_assert() failed: %d\n", ret);
> + return ret;
> + }
>
> - davinci_clk_reset_assert(drproc->dsp_clk);
> clk_disable_unprepare(drproc->dsp_clk);
>
> return 0;
> @@ -232,6 +245,7 @@ static int da8xx_rproc_probe(struct platform_device *pdev)
> struct resource *bootreg_res;
> struct resource *chipsig_res;
> struct clk *dsp_clk;
> + struct reset_control *dsp_reset;
> void __iomem *chipsig;
> void __iomem *bootreg;
> int irq;
> @@ -268,6 +282,15 @@ static int da8xx_rproc_probe(struct platform_device *pdev)
> return PTR_ERR(dsp_clk);
> }
>
> + dsp_reset = devm_reset_control_get_exclusive(dev, NULL);
> + if (IS_ERR(dsp_reset)) {
> + if (PTR_ERR(dsp_reset) != -EPROBE_DEFER)
> + dev_err(dev, "unable to get reset control: %ld\n",
> + PTR_ERR(dsp_reset));
> +
> + return PTR_ERR(dsp_reset);
> + }
> +
> if (dev->of_node) {
> ret = of_reserved_mem_device_init(dev);
> if (ret) {
> @@ -287,6 +310,7 @@ static int da8xx_rproc_probe(struct platform_device *pdev)
> drproc = rproc->priv;
> drproc->rproc = rproc;
> drproc->dsp_clk = dsp_clk;
> + drproc->dsp_reset = dsp_reset;
> rproc->has_iommu = false;
>
> ret = da8xx_rproc_get_internal_memories(pdev, drproc);
> @@ -309,7 +333,7 @@ static int da8xx_rproc_probe(struct platform_device *pdev)
> * *not* in reset, but da8xx_rproc_start() needs the DSP to be
> * held in reset at the time it is called.
> */
> - ret = davinci_clk_reset_assert(drproc->dsp_clk);
> + ret = reset_control_assert(dsp_reset);
> if (ret)
> goto free_rproc;
>
> --
> 2.17.1
>

Hi Bjorn, Sekhar,

I'm not seeing this patch in next, did you agree on how to pick it up for 4.19?

Thanks in advance,
Bartosz

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