Re: [PATCH v6 4/4] soc/tegra: pmc: Use the new reset APIs to manage reset controllers

2018-02-13 Thread Jon Hunter


On 19/06/17 15:34, Philipp Zabel wrote:
> From: Vivek Gautam 
> 
> Make use of of_reset_control_array_get_exclusive() to manage
> an array of reset controllers available with the device.
> 
> Cc: Jon Hunter 
> Cc: Thierry Reding 
> Signed-off-by: Vivek Gautam 
> [p.za...@pengutronix.de: switch to hidden reset control array]
> Signed-off-by: Philipp Zabel 
> ---
> Changes since v5: updated commit message, added missing SoB
> ---
>  drivers/soc/tegra/pmc.c | 82 
> -
>  1 file changed, 20 insertions(+), 62 deletions(-)
> 
> diff --git a/drivers/soc/tegra/pmc.c b/drivers/soc/tegra/pmc.c
> index e233dd5dcab3d..749b218147a19 100644
> --- a/drivers/soc/tegra/pmc.c
> +++ b/drivers/soc/tegra/pmc.c
> @@ -124,8 +124,7 @@ struct tegra_powergate {
>   unsigned int id;
>   struct clk **clks;
>   unsigned int num_clks;
> - struct reset_control **resets;
> - unsigned int num_resets;
> + struct reset_control *reset;
>  };
>  
>  struct tegra_io_pad_soc {
> @@ -348,32 +347,14 @@ static int tegra_powergate_enable_clocks(struct 
> tegra_powergate *pg)
>   return err;
>  }
>  
> -static int tegra_powergate_reset_assert(struct tegra_powergate *pg)
> +static inline int tegra_powergate_reset_assert(struct tegra_powergate *pg)
>  {
> - unsigned int i;
> - int err;
> -
> - for (i = 0; i < pg->num_resets; i++) {
> - err = reset_control_assert(pg->resets[i]);
> - if (err)
> - return err;
> - }
> -
> - return 0;
> + return reset_control_assert(pg->reset);
>  }
>  
> -static int tegra_powergate_reset_deassert(struct tegra_powergate *pg)
> +static inline int tegra_powergate_reset_deassert(struct tegra_powergate *pg)
>  {
> - unsigned int i;
> - int err;
> -
> - for (i = 0; i < pg->num_resets; i++) {
> - err = reset_control_deassert(pg->resets[i]);
> - if (err)
> - return err;
> - }
> -
> - return 0;
> + return reset_control_deassert(pg->reset);
>  }
>  
>  static int tegra_powergate_power_up(struct tegra_powergate *pg,
> @@ -566,8 +547,7 @@ int tegra_powergate_sequence_power_up(unsigned int id, 
> struct clk *clk,
>   pg.id = id;
>   pg.clks = 
>   pg.num_clks = 1;
> - pg.resets = 
> - pg.num_resets = 1;
> + pg.reset = IS_ERR(rst) ? NULL : rst;
>  
>   err = tegra_powergate_power_up(, false);
>   if (err)
> @@ -755,45 +735,26 @@ static int tegra_powergate_of_get_clks(struct 
> tegra_powergate *pg,
>  static int tegra_powergate_of_get_resets(struct tegra_powergate *pg,
>struct device_node *np, bool off)
>  {
> - struct reset_control *rst;
> - unsigned int i, count;
>   int err;
>  
> - count = of_count_phandle_with_args(np, "resets", "#reset-cells");
> - if (count == 0)
> - return -ENODEV;
> -
> - pg->resets = kcalloc(count, sizeof(rst), GFP_KERNEL);
> - if (!pg->resets)
> - return -ENOMEM;
> -
> - for (i = 0; i < count; i++) {
> - pg->resets[i] = of_reset_control_get_by_index(np, i);
> - if (IS_ERR(pg->resets[i])) {
> - err = PTR_ERR(pg->resets[i]);
> - goto error;
> - }
> -
> - if (off)
> - err = reset_control_assert(pg->resets[i]);
> - else
> - err = reset_control_deassert(pg->resets[i]);
> -
> - if (err) {
> - reset_control_put(pg->resets[i]);
> - goto error;
> - }
> + pg->reset = of_reset_control_array_get_exclusive(np);
> + if (IS_ERR(pg->reset)) {
> + pr_err("failed to get device resets\n");
> + return PTR_ERR(pg->reset);
>   }
>  
> - pg->num_resets = count;
> + if (off)
> + err = reset_control_assert(pg->reset);
> + else
> + err = reset_control_deassert(pg->reset);
>  
> - return 0;
> + if (err)
> + goto put_reset;
>  
> -error:
> - while (i--)
> - reset_control_put(pg->resets[i]);
> + return 0;
>  
> - kfree(pg->resets);
> +put_reset:
> + reset_control_put(pg->reset);
>  
>   return err;
>  }
> @@ -885,10 +846,7 @@ static void tegra_powergate_add(struct tegra_pmc *pmc, 
> struct device_node *np)
>   pm_genpd_remove(>genpd);
>  
>  remove_resets:
> - while (pg->num_resets--)
> - reset_control_put(pg->resets[pg->num_resets]);
> -
> - kfree(pg->resets);
> + reset_control_put(pg->reset);
>  
>  remove_clks:
>   while (pg->num_clks--)
> 

Acked-by: Jon Hunter 
Tested-by: Jon Hunter 

Cheers
Jon

-- 
nvpublic


Re: [PATCH v6 4/4] soc/tegra: pmc: Use the new reset APIs to manage reset controllers

2018-02-13 Thread Jon Hunter


On 19/06/17 15:34, Philipp Zabel wrote:
> From: Vivek Gautam 
> 
> Make use of of_reset_control_array_get_exclusive() to manage
> an array of reset controllers available with the device.
> 
> Cc: Jon Hunter 
> Cc: Thierry Reding 
> Signed-off-by: Vivek Gautam 
> [p.za...@pengutronix.de: switch to hidden reset control array]
> Signed-off-by: Philipp Zabel 
> ---
> Changes since v5: updated commit message, added missing SoB
> ---
>  drivers/soc/tegra/pmc.c | 82 
> -
>  1 file changed, 20 insertions(+), 62 deletions(-)
> 
> diff --git a/drivers/soc/tegra/pmc.c b/drivers/soc/tegra/pmc.c
> index e233dd5dcab3d..749b218147a19 100644
> --- a/drivers/soc/tegra/pmc.c
> +++ b/drivers/soc/tegra/pmc.c
> @@ -124,8 +124,7 @@ struct tegra_powergate {
>   unsigned int id;
>   struct clk **clks;
>   unsigned int num_clks;
> - struct reset_control **resets;
> - unsigned int num_resets;
> + struct reset_control *reset;
>  };
>  
>  struct tegra_io_pad_soc {
> @@ -348,32 +347,14 @@ static int tegra_powergate_enable_clocks(struct 
> tegra_powergate *pg)
>   return err;
>  }
>  
> -static int tegra_powergate_reset_assert(struct tegra_powergate *pg)
> +static inline int tegra_powergate_reset_assert(struct tegra_powergate *pg)
>  {
> - unsigned int i;
> - int err;
> -
> - for (i = 0; i < pg->num_resets; i++) {
> - err = reset_control_assert(pg->resets[i]);
> - if (err)
> - return err;
> - }
> -
> - return 0;
> + return reset_control_assert(pg->reset);
>  }
>  
> -static int tegra_powergate_reset_deassert(struct tegra_powergate *pg)
> +static inline int tegra_powergate_reset_deassert(struct tegra_powergate *pg)
>  {
> - unsigned int i;
> - int err;
> -
> - for (i = 0; i < pg->num_resets; i++) {
> - err = reset_control_deassert(pg->resets[i]);
> - if (err)
> - return err;
> - }
> -
> - return 0;
> + return reset_control_deassert(pg->reset);
>  }
>  
>  static int tegra_powergate_power_up(struct tegra_powergate *pg,
> @@ -566,8 +547,7 @@ int tegra_powergate_sequence_power_up(unsigned int id, 
> struct clk *clk,
>   pg.id = id;
>   pg.clks = 
>   pg.num_clks = 1;
> - pg.resets = 
> - pg.num_resets = 1;
> + pg.reset = IS_ERR(rst) ? NULL : rst;
>  
>   err = tegra_powergate_power_up(, false);
>   if (err)
> @@ -755,45 +735,26 @@ static int tegra_powergate_of_get_clks(struct 
> tegra_powergate *pg,
>  static int tegra_powergate_of_get_resets(struct tegra_powergate *pg,
>struct device_node *np, bool off)
>  {
> - struct reset_control *rst;
> - unsigned int i, count;
>   int err;
>  
> - count = of_count_phandle_with_args(np, "resets", "#reset-cells");
> - if (count == 0)
> - return -ENODEV;
> -
> - pg->resets = kcalloc(count, sizeof(rst), GFP_KERNEL);
> - if (!pg->resets)
> - return -ENOMEM;
> -
> - for (i = 0; i < count; i++) {
> - pg->resets[i] = of_reset_control_get_by_index(np, i);
> - if (IS_ERR(pg->resets[i])) {
> - err = PTR_ERR(pg->resets[i]);
> - goto error;
> - }
> -
> - if (off)
> - err = reset_control_assert(pg->resets[i]);
> - else
> - err = reset_control_deassert(pg->resets[i]);
> -
> - if (err) {
> - reset_control_put(pg->resets[i]);
> - goto error;
> - }
> + pg->reset = of_reset_control_array_get_exclusive(np);
> + if (IS_ERR(pg->reset)) {
> + pr_err("failed to get device resets\n");
> + return PTR_ERR(pg->reset);
>   }
>  
> - pg->num_resets = count;
> + if (off)
> + err = reset_control_assert(pg->reset);
> + else
> + err = reset_control_deassert(pg->reset);
>  
> - return 0;
> + if (err)
> + goto put_reset;
>  
> -error:
> - while (i--)
> - reset_control_put(pg->resets[i]);
> + return 0;
>  
> - kfree(pg->resets);
> +put_reset:
> + reset_control_put(pg->reset);
>  
>   return err;
>  }
> @@ -885,10 +846,7 @@ static void tegra_powergate_add(struct tegra_pmc *pmc, 
> struct device_node *np)
>   pm_genpd_remove(>genpd);
>  
>  remove_resets:
> - while (pg->num_resets--)
> - reset_control_put(pg->resets[pg->num_resets]);
> -
> - kfree(pg->resets);
> + reset_control_put(pg->reset);
>  
>  remove_clks:
>   while (pg->num_clks--)
> 

Acked-by: Jon Hunter 
Tested-by: Jon Hunter 

Cheers
Jon

-- 
nvpublic