From: pgaikwad@nvidia•com (Prashant Gaikwad)
To: linux-arm-kernel@lists•infradead.org
Subject: [PATCH v5 06/10] clk: tegra: Workaround for Tegra114 MSENC problem
Date: Mon, 4 Feb 2013 12:09:45 +0530 [thread overview]
Message-ID: <510F57B1.1050906@nvidia.com> (raw)
In-Reply-To: <1359713962-16822-7-git-send-email-pdeschrijver@nvidia.com>
On Friday 01 February 2013 03:48 PM, Peter De Schrijver wrote:
> Workaround a hardware bug in MSENC during clock enable.
>
> Signed-off-by: Peter De Schrijver <pdeschrijver@nvidia•com>
> ---
> drivers/clk/tegra/clk-periph-gate.c | 9 +++++++++
> drivers/clk/tegra/clk.h | 1 +
> 2 files changed, 10 insertions(+), 0 deletions(-)
>
> diff --git a/drivers/clk/tegra/clk-periph-gate.c b/drivers/clk/tegra/clk-periph-gate.c
> index 6dd5332..c9083fb 100644
> --- a/drivers/clk/tegra/clk-periph-gate.c
> +++ b/drivers/clk/tegra/clk-periph-gate.c
> @@ -43,6 +43,8 @@ static DEFINE_SPINLOCK(periph_ref_lock);
>
> #define periph_clk_to_bit(periph) (1 << (gate->clk_num % 32))
>
> +#define LVL2_CLK_GATE_OVRE 0x554
> +
> /* Peripheral gate clock ops */
> static int clk_periph_is_enabled(struct clk_hw *hw)
> {
> @@ -83,6 +85,13 @@ static int clk_periph_enable(struct clk_hw *hw)
> }
> }
>
> + if (gate->flags & TEGRA_PERIPH_WAR_1005168) {
> + writel_relaxed(0, gate->clk_base + LVL2_CLK_GATE_OVRE);
> + writel_relaxed(BIT(22), gate->clk_base + LVL2_CLK_GATE_OVRE);
> + udelay(1);
> + writel_relaxed(0, gate->clk_base + LVL2_CLK_GATE_OVRE);
> + }
> +
> spin_unlock_irqrestore(&periph_ref_lock, flags);
>
> return 0;
> diff --git a/drivers/clk/tegra/clk.h b/drivers/clk/tegra/clk.h
> index 79f5e2a..8756d9f 100644
> --- a/drivers/clk/tegra/clk.h
> +++ b/drivers/clk/tegra/clk.h
> @@ -371,6 +371,7 @@ struct tegra_clk_periph_gate {
> #define TEGRA_PERIPH_NO_RESET BIT(0)
> #define TEGRA_PERIPH_MANUAL_RESET BIT(1)
> #define TEGRA_PERIPH_ON_APB BIT(2)
> +#define TEGRA_PERIPH_WAR_1005168 BIT(3)
>
Comment for this flag, otherwise
Reviewed-by: Prashant Gaikwad <pgaikwad@nvidia•com>
> void tegra_periph_reset(struct tegra_clk_periph_gate *gate, bool assert);
> extern const struct clk_ops tegra_clk_periph_gate_ops;
>
next prev parent reply other threads:[~2013-02-04 6:39 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-02-01 10:18 [PATCH v5 00/10] Tegra114 clockframework Peter De Schrijver
2013-02-01 10:18 ` [PATCH v5 01/10] clk: tegra: Refactor PLL programming code Peter De Schrijver
2013-02-04 6:06 ` Prashant Gaikwad
2013-02-04 14:32 ` Peter De Schrijver
2013-02-05 5:42 ` Prashant Gaikwad
2013-02-05 13:23 ` Peter De Schrijver
2013-02-06 12:32 ` Peter De Schrijver
2013-02-04 21:57 ` Stephen Warren
2013-02-01 10:18 ` [PATCH v5 02/10] clk: tegra: Add TEGRA_PLL_BYPASS flag Peter De Schrijver
2013-02-04 6:13 ` Prashant Gaikwad
2013-02-01 10:18 ` [PATCH v5 03/10] clk: tegra: Add PLL post divider table Peter De Schrijver
2013-02-04 6:28 ` Prashant Gaikwad
2013-02-01 10:18 ` [PATCH v5 04/10] clk: tegra: Add new fields and PLL types for Tegra114 Peter De Schrijver
2013-02-01 19:40 ` Rhyland Klein
2013-02-04 6:35 ` Prashant Gaikwad
2013-02-04 10:37 ` Peter De Schrijver
2013-02-01 10:18 ` [PATCH v5 05/10] clk: tegra: Add flags to tegra_clk_periph() Peter De Schrijver
2013-02-04 6:33 ` Prashant Gaikwad
2013-02-01 10:18 ` [PATCH v5 06/10] clk: tegra: Workaround for Tegra114 MSENC problem Peter De Schrijver
2013-02-04 6:39 ` Prashant Gaikwad [this message]
2013-02-01 10:18 ` [PATCH v5 07/10] ARM: tegra: Define Tegra114 CAR binding Peter De Schrijver
2013-02-04 21:16 ` Stephen Warren
2013-02-01 10:18 ` [PATCH v5 08/10] ARM: dt: Add references to tegra_car clocks Peter De Schrijver
2013-02-04 6:45 ` Prashant Gaikwad
2013-02-01 10:18 ` [PATCH v5 09/10] clk: tegra: Implement clocks for Tegra114 Peter De Schrijver
2013-02-04 7:08 ` Prashant Gaikwad
2013-02-04 10:45 ` Peter De Schrijver
2013-02-04 14:07 ` Peter De Schrijver
2013-02-04 21:01 ` Stephen Warren
2013-02-07 16:18 ` Peter De Schrijver
2013-02-04 14:34 ` Peter De Schrijver
2013-02-05 5:36 ` Prashant Gaikwad
2013-02-01 10:18 ` [PATCH v5 10/10] clk: tegra: devicetree match for nvidia, tegra114-car Peter De Schrijver
2013-02-04 7:10 ` Prashant Gaikwad
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