From: Matthias Brugger <matthias.bgg@gmail.com>
To: Weiyi Lu <weiyi.lu@mediatek.com>,
Nicolas Boichat <drinkcat@chromium.org>,
Rob Herring <robh@kernel.org>,
Sascha Hauer <kernel@pengutronix.de>
Cc: James Liao <jamesjj.liao@mediatek.com>,
srv_heupstream@mediatek.com, linux-kernel@vger.kernel.org,
Fan Chen <fan.chen@mediatek.com>,
linux-mediatek@lists.infradead.org,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v11 07/10] soc: mediatek: Add extra sram control
Date: Tue, 11 Feb 2020 18:04:50 +0100 [thread overview]
Message-ID: <28fcf690-74cb-b7cd-a53b-e54be71457b9@gmail.com> (raw)
In-Reply-To: <1576813564-23927-8-git-send-email-weiyi.lu@mediatek.com>
On 20/12/2019 04:46, Weiyi Lu wrote:
> For some power domains like vpu_core on MT8183 whose sram need to
> do clock and internal isolation while power on/off sram.
> We add a flag "sram_iso_ctrl" in scp_domain_data to judge if we
> need to do the extra sram isolation control or not.
>
> Signed-off-by: Weiyi Lu <weiyi.lu@mediatek.com>
> Reviewed-by: Nicolas Boichat <drinkcat@chromium.org>
> ---
> drivers/soc/mediatek/mtk-scpsys.c | 24 ++++++++++++++++++++++--
> 1 file changed, 22 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/soc/mediatek/mtk-scpsys.c b/drivers/soc/mediatek/mtk-scpsys.c
> index 32be4b3..1972726 100644
> --- a/drivers/soc/mediatek/mtk-scpsys.c
> +++ b/drivers/soc/mediatek/mtk-scpsys.c
> @@ -56,6 +56,8 @@
> #define PWR_ON_BIT BIT(2)
> #define PWR_ON_2ND_BIT BIT(3)
> #define PWR_CLK_DIS_BIT BIT(4)
> +#define PWR_SRAM_CLKISO_BIT BIT(5)
> +#define PWR_SRAM_ISOINT_B_BIT BIT(6)
>
> #define PWR_STATUS_CONN BIT(1)
> #define PWR_STATUS_DISP BIT(3)
> @@ -86,6 +88,8 @@
> * @name: The domain name.
> * @sta_mask: The mask for power on/off status bit.
> * @ctl_offs: The offset for main power control register.
> + * @sram_iso_ctrl: The flag to judge if the power domain need to do
> + * the extra sram isolation control.
> * @sram_pdn_bits: The mask for sram power control bits.
> * @sram_pdn_ack_bits: The mask for sram power control acked bits.
> * @basic_clk_name: The basic clocks required by this power domain.
> @@ -98,6 +102,7 @@ struct scp_domain_data {
> const char *name;
> u32 sta_mask;
> int ctl_offs;
> + bool sram_iso_ctrl;
Why don't we put that into the caps variable? We have plenty of space left there
and if needed we can bump up its value from u8 to u32.
> u32 sram_pdn_bits;
> u32 sram_pdn_ack_bits;
> const char *basic_clk_name[MAX_CLKS];
> @@ -233,6 +238,14 @@ static int scpsys_sram_enable(struct scp_domain *scpd, void __iomem *ctl_addr)
> return ret;
> }
>
> + if (scpd->data->sram_iso_ctrl) {
> + val = readl(ctl_addr) | PWR_SRAM_ISOINT_B_BIT;
> + writel(val, ctl_addr);
> + udelay(1);
> + val &= ~PWR_SRAM_CLKISO_BIT;
> + writel(val, ctl_addr);
> + }
> +
> return 0;
> }
>
> @@ -242,8 +255,15 @@ static int scpsys_sram_disable(struct scp_domain *scpd, void __iomem *ctl_addr)
> u32 pdn_ack = scpd->data->sram_pdn_ack_bits;
> int tmp;
>
> - val = readl(ctl_addr);
> - val |= scpd->data->sram_pdn_bits;
> + if (scpd->data->sram_iso_ctrl) {
> + val = readl(ctl_addr) | PWR_SRAM_CLKISO_BIT;
> + writel(val, ctl_addr);
> + val &= ~PWR_SRAM_ISOINT_B_BIT;
> + writel(val, ctl_addr);
> + udelay(1);
Why do we need to wait here?
> + }
> +
> + val = readl(ctl_addr) | scpd->data->sram_pdn_bits;
> writel(val, ctl_addr);
>
> /* Either wait until SRAM_PDN_ACK all 1 or 0 */
>
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next prev parent reply other threads:[~2020-02-11 17:05 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-20 3:45 [PATCH v11 00/10] Mediatek MT8183 scpsys support Weiyi Lu
2019-12-20 3:45 ` [PATCH v11 01/10] dt-bindings: mediatek: Add property to mt8183 smi-common Weiyi Lu
2020-01-15 5:45 ` Weiyi Lu
2019-12-20 3:45 ` [PATCH v11 02/10] dt-bindings: soc: Add MT8183 power dt-bindings Weiyi Lu
2019-12-20 3:45 ` [PATCH v11 03/10] soc: mediatek: Add basic_clk_name to scp_power_data Weiyi Lu
2019-12-20 4:05 ` Nicolas Boichat
2019-12-20 3:45 ` [PATCH v11 04/10] soc: mediatek: Add multiple step bus protection control Weiyi Lu
2019-12-20 4:09 ` Nicolas Boichat
2020-02-11 17:49 ` Matthias Brugger
2020-02-12 2:55 ` Weiyi Lu
2020-02-12 9:23 ` Matthias Brugger
2020-02-13 2:15 ` Weiyi Lu
2020-02-13 11:11 ` Matthias Brugger
2019-12-20 3:45 ` [PATCH v11 05/10] soc: mediatek: Remove infracfg misc driver support Weiyi Lu
2019-12-20 4:11 ` Nicolas Boichat
2019-12-20 5:00 ` Weiyi Lu
2019-12-20 5:09 ` Nicolas Boichat
2019-12-20 3:46 ` [PATCH v11 06/10] soc: mediatek: Add subsys clock control for bus protection Weiyi Lu
2020-02-11 17:54 ` Matthias Brugger
2020-02-12 2:55 ` Weiyi Lu
2020-02-12 11:02 ` Matthias Brugger
2020-02-13 2:46 ` Weiyi Lu
2020-02-13 12:56 ` Matthias Brugger
2020-02-14 6:33 ` Weiyi Lu
2020-02-14 6:42 ` Weiyi Lu
2019-12-20 3:46 ` [PATCH v11 07/10] soc: mediatek: Add extra sram control Weiyi Lu
2020-02-11 17:04 ` Matthias Brugger [this message]
2020-02-12 2:56 ` Weiyi Lu
2019-12-20 3:46 ` [PATCH v11 08/10] soc: mediatek: Add MT8183 scpsys support Weiyi Lu
2019-12-20 5:11 ` Nicolas Boichat
2019-12-20 3:46 ` [PATCH v11 09/10] arm64: dts: Add power controller device node of MT8183 Weiyi Lu
2019-12-20 3:46 ` [PATCH v11 10/10] arm64: dts: Add power-domains properity to mfgcfg Weiyi Lu
2019-12-27 1:43 ` [PATCH v11 00/10] Mediatek MT8183 scpsys support Weiyi Lu
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