On 06.05.21 03:04, Peng Fan (OSS) wrote:
> From: Lucas Stach <l.stach@xxxxxxxxxxxxxx>
>
> Use clk_bulk API to simplify the code a bit. Also add some error
> checking to the clk_prepare_enable calls.
>
> Signed-off-by: Lucas Stach <l.stach@xxxxxxxxxxxxxx>
> Signed-off-by: Peng Fan <peng.fan@xxxxxxx>
Reviewed-by: Frieder Schrempf <frieder.schrempf@xxxxxxxxxx>
> ---
> drivers/soc/imx/gpcv2.c | 60 +++++++++--------------------------------
> 1 file changed, 12 insertions(+), 48 deletions(-)
>
> diff --git a/drivers/soc/imx/gpcv2.c b/drivers/soc/imx/gpcv2.c
> index 552d3e6bee52..4222b6e87e7c 100644
> --- a/drivers/soc/imx/gpcv2.c
> +++ b/drivers/soc/imx/gpcv2.c
> @@ -100,13 +100,11 @@
>
> #define GPC_PGC_CTRL_PCR BIT(0)
>
> -#define GPC_CLK_MAX 6
> -
> struct imx_pgc_domain {
> struct generic_pm_domain genpd;
> struct regmap *regmap;
> struct regulator *regulator;
> - struct clk *clk[GPC_CLK_MAX];
> + struct clk_bulk_data *clks;
> int num_clks;
>
> unsigned int pgc;
> @@ -149,8 +147,12 @@ static int imx_gpc_pu_pgc_sw_pxx_req(struct generic_pm_domain *genpd,
> }
>
> /* Enable reset clocks for all devices in the domain */
> - for (i = 0; i < domain->num_clks; i++)
> - clk_prepare_enable(domain->clk[i]);
> + ret = clk_bulk_prepare_enable(domain->num_clks, domain->clks);
> + if (ret) {
> + dev_err(domain->dev, "failed to enable reset clocks\n");
> + regulator_disable(domain->regulator);
> + return ret;
> + }
>
> if (enable_power_control)
> regmap_update_bits(domain->regmap, GPC_PGC_CTRL(domain->pgc),
> @@ -187,8 +189,7 @@ static int imx_gpc_pu_pgc_sw_pxx_req(struct generic_pm_domain *genpd,
> GPC_PGC_CTRL_PCR, 0);
>
> /* Disable reset clocks for all devices in the domain */
> - for (i = 0; i < domain->num_clks; i++)
> - clk_disable_unprepare(domain->clk[i]);
> + clk_bulk_disable_unprepare(domain->num_clks, domain->clks);
>
> if (has_regulator && !on) {
> int err;
> @@ -438,41 +439,6 @@ static const struct imx_pgc_domain_data imx8m_pgc_domain_data = {
> .reg_access_table = &imx8m_access_table,
> };
>
> -static int imx_pgc_get_clocks(struct imx_pgc_domain *domain)
> -{
> - int i, ret;
> -
> - for (i = 0; ; i++) {
> - struct clk *clk = of_clk_get(domain->dev->of_node, i);
> - if (IS_ERR(clk))
> - break;
> - if (i >= GPC_CLK_MAX) {
> - dev_err(domain->dev, "more than %d clocks\n",
> - GPC_CLK_MAX);
> - ret = -EINVAL;
> - goto clk_err;
> - }
> - domain->clk[i] = clk;
> - }
> - domain->num_clks = i;
> -
> - return 0;
> -
> -clk_err:
> - while (i--)
> - clk_put(domain->clk[i]);
> -
> - return ret;
> -}
> -
> -static void imx_pgc_put_clocks(struct imx_pgc_domain *domain)
> -{
> - int i;
> -
> - for (i = domain->num_clks - 1; i >= 0; i--)
> - clk_put(domain->clk[i]);
> -}
> -
> static int imx_pgc_domain_probe(struct platform_device *pdev)
> {
> struct imx_pgc_domain *domain = pdev->dev.platform_data;
> @@ -490,9 +456,10 @@ static int imx_pgc_domain_probe(struct platform_device *pdev)
> domain->voltage, domain->voltage);
> }
>
> - ret = imx_pgc_get_clocks(domain);
> - if (ret)
> - return dev_err_probe(domain->dev, ret, "Failed to get domain's clocks\n");
> + domain->num_clks = devm_clk_bulk_get_all(domain->dev, &domain->clks);
> + if (domain->num_clks < 0)
> + return dev_err_probe(domain->dev, domain->num_clks,
> + "Failed to get domain's clocks\n");
>
> regmap_update_bits(domain->regmap, GPC_PGC_CPU_MAPPING,
> domain->bits.map, domain->bits.map);
> @@ -517,7 +484,6 @@ static int imx_pgc_domain_probe(struct platform_device *pdev)
> out_domain_unmap:
> regmap_update_bits(domain->regmap, GPC_PGC_CPU_MAPPING,
> domain->bits.map, 0);
> - imx_pgc_put_clocks(domain);
>
> return ret;
> }
> @@ -532,8 +498,6 @@ static int imx_pgc_domain_remove(struct platform_device *pdev)
> regmap_update_bits(domain->regmap, GPC_PGC_CPU_MAPPING,
> domain->bits.map, 0);
>
> - imx_pgc_put_clocks(domain);
> -
> return 0;
> }
>
>
