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Date: Wed, 6 May 2020 23:01:50 +0200
From: Enric Balletbo i Serra <enric.balletbo@...labora.com>
To: Weiyi Lu <weiyi.lu@...iatek.com>,
Enric Balletbo Serra <eballetbo@...il.com>,
Matthias Brugger <matthias.bgg@...il.com>,
Nicolas Boichat <drinkcat@...omium.org>,
Rob Herring <robh@...nel.org>,
Sascha Hauer <kernel@...gutronix.de>
Cc: James Liao <jamesjj.liao@...iatek.com>,
srv_heupstream@...iatek.com, linux-kernel@...r.kernel.org,
Fan Chen <fan.chen@...iatek.com>,
linux-mediatek@...ts.infradead.org,
linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v14 03/11] soc: mediatek: Add basic_clk_name to
scp_power_data
Hi Weiyi,
Thank you for your patch.
On 6/5/20 10:15, Weiyi Lu wrote:
> Try to stop extending the clk_id or clk_names if there are
> more and more new BASIC clocks. To get its own clocks by the
> basic_clk_name of each power domain.
> And then use basic_clk_name strings for all compatibles, instead of
> mixing clk_id and clk_name.
>
> Signed-off-by: Weiyi Lu <weiyi.lu@...iatek.com>
> Reviewed-by: Nicolas Boichat <drinkcat@...omium.org>
> ---
> drivers/soc/mediatek/mtk-scpsys.c | 134 ++++++++++++--------------------------
> 1 file changed, 41 insertions(+), 93 deletions(-)
>
> diff --git a/drivers/soc/mediatek/mtk-scpsys.c b/drivers/soc/mediatek/mtk-scpsys.c
> index f669d37..c9c3cf7 100644
> --- a/drivers/soc/mediatek/mtk-scpsys.c
> +++ b/drivers/soc/mediatek/mtk-scpsys.c
> @@ -78,34 +78,6 @@
> #define PWR_STATUS_HIF1 BIT(26) /* MT7622 */
> #define PWR_STATUS_WB BIT(27) /* MT7622 */
>
> -enum clk_id {
> - CLK_NONE,
> - CLK_MM,
> - CLK_MFG,
> - CLK_VENC,
> - CLK_VENC_LT,
> - CLK_ETHIF,
> - CLK_VDEC,
> - CLK_HIFSEL,
> - CLK_JPGDEC,
> - CLK_AUDIO,
> - CLK_MAX,
> -};
> -
> -static const char * const clk_names[] = {
> - NULL,
> - "mm",
> - "mfg",
> - "venc",
> - "venc_lt",
> - "ethif",
> - "vdec",
> - "hif_sel",
> - "jpgdec",
> - "audio",
> - NULL,
> -};
> -
> #define MAX_CLKS 3
>
> /**
> @@ -116,7 +88,7 @@ enum clk_id {
> * @sram_pdn_bits: The mask for sram power control bits.
> * @sram_pdn_ack_bits: The mask for sram power control acked bits.
> * @bus_prot_mask: The mask for single step bus protection.
> - * @clk_id: The basic clocks required by this power domain.
> + * @basic_clk_name: The basic clocks required by this power domain.
> * @caps: The flag for active wake-up action.
> */
> struct scp_domain_data {
> @@ -126,7 +98,7 @@ struct scp_domain_data {
> u32 sram_pdn_bits;
> u32 sram_pdn_ack_bits;
> u32 bus_prot_mask;
> - enum clk_id clk_id[MAX_CLKS];
> + const char *basic_clk_name[MAX_CLKS];
I only reviewed v13, so sorry if this was already discussed. I am wondering if
would be better take advantage of the devm_clk_bulk_get() function instead of
kind of reimplementing the same, something like this
const struct clk_bulk_data *basic_clocks;
> u8 caps;
> };
>
> @@ -411,12 +383,19 @@ static int scpsys_power_off(struct generic_pm_domain *genpd)
> return ret;
> }
>
> -static void init_clks(struct platform_device *pdev, struct clk **clk)
> +static int init_basic_clks(struct platform_device *pdev, struct clk **clk,
> + const char * const *name)
> {
> int i;
>
> - for (i = CLK_NONE + 1; i < CLK_MAX; i++)
> - clk[i] = devm_clk_get(&pdev->dev, clk_names[i]);
> + for (i = 0; i < MAX_CLKS && name[i]; i++) {
> + clk[i] = devm_clk_get(&pdev->dev, name[i]);
> +
> + if (IS_ERR(clk[i]))
> + return PTR_ERR(clk[i]);
> + }
You will be able to remove this function, see below ...
> +
> + return 0;
> }
>
> static struct scp *init_scp(struct platform_device *pdev,
> @@ -426,9 +405,8 @@ static struct scp *init_scp(struct platform_device *pdev,
> {
> struct genpd_onecell_data *pd_data;
> struct resource *res;
> - int i, j;
> + int i, ret;
> struct scp *scp;
> - struct clk *clk[CLK_MAX];
>
> scp = devm_kzalloc(&pdev->dev, sizeof(*scp), GFP_KERNEL);
> if (!scp)
> @@ -481,8 +459,6 @@ static struct scp *init_scp(struct platform_device *pdev,
>
> pd_data->num_domains = num;
>
> - init_clks(pdev, clk);
> -
> for (i = 0; i < num; i++) {
> struct scp_domain *scpd = &scp->domains[i];
> struct generic_pm_domain *genpd = &scpd->genpd;
> @@ -493,17 +469,9 @@ static struct scp *init_scp(struct platform_device *pdev,
>
> scpd->data = data;
>
> - for (j = 0; j < MAX_CLKS && data->clk_id[j]; j++) {
> - struct clk *c = clk[data->clk_id[j]];
> -
> - if (IS_ERR(c)) {
> - dev_err(&pdev->dev, "%s: clk unavailable\n",
> - data->name);
> - return ERR_CAST(c);
> - }
> -
> - scpd->clk[j] = c;
> - }
> + ret = init_basic_clks(pdev, scpd->clk, data->basic_clk_name);
> + if (ret)
> + return ERR_PTR(ret);
Just call:
ret = devm_clk_bulk_get(&pdev->dev, ARRAY_SIZE(basic_clocks),
data->basic_clocks);
if (ret)
return ERR_PTR(ret);
>
> genpd->name = data->name;
> genpd->power_off = scpsys_power_off;
> @@ -560,7 +528,6 @@ static void mtk_register_power_domains(struct platform_device *pdev,
> .ctl_offs = SPM_CONN_PWR_CON,
> .bus_prot_mask = MT2701_TOP_AXI_PROT_EN_CONN_M |
> MT2701_TOP_AXI_PROT_EN_CONN_S,
> - .clk_id = {CLK_NONE},
> .caps = MTK_SCPD_ACTIVE_WAKEUP,
> },
> [MT2701_POWER_DOMAIN_DISP] = {
> @@ -568,7 +535,7 @@ static void mtk_register_power_domains(struct platform_device *pdev,
> .sta_mask = PWR_STATUS_DISP,
> .ctl_offs = SPM_DIS_PWR_CON,
> .sram_pdn_bits = GENMASK(11, 8),
> - .clk_id = {CLK_MM},
> + .basic_clk_name = {"mm"},
.basic_clocks[] = {
{ .id = "mm" },
};
> .bus_prot_mask = MT2701_TOP_AXI_PROT_EN_MM_M0,
> .caps = MTK_SCPD_ACTIVE_WAKEUP,
> },
> @@ -578,7 +545,7 @@ static void mtk_register_power_domains(struct platform_device *pdev,
> .ctl_offs = SPM_MFG_PWR_CON,
> .sram_pdn_bits = GENMASK(11, 8),
> .sram_pdn_ack_bits = GENMASK(12, 12),
> - .clk_id = {CLK_MFG},
> + .basic_clk_name = {"mfg"},
.basic_clocks[] = {
{ .id = "mfg" },
};
> .caps = MTK_SCPD_ACTIVE_WAKEUP,
> },
> [MT2701_POWER_DOMAIN_VDEC] = {
> @@ -587,7 +554,7 @@ static void mtk_register_power_domains(struct platform_device *pdev,
> .ctl_offs = SPM_VDE_PWR_CON,
> .sram_pdn_bits = GENMASK(11, 8),
> .sram_pdn_ack_bits = GENMASK(12, 12),
> - .clk_id = {CLK_MM},
> + .basic_clk_name = {"mm"},
...
[snip]
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