From: Sowjanya Komatineni <skomatineni@nvidia.com>
To: <thierry.reding@gmail.com>, <jonathanh@nvidia.com>,
<tglx@linutronix.de>, <jason@lakedaemon.net>,
<marc.zyngier@arm.com>, <linus.walleij@linaro.org>,
<stefan@agner.ch>, <mark.rutland@arm.com>
Cc: <pdeschrijver@nvidia.com>, <pgaikwad@nvidia.com>,
<sboyd@kernel.org>, <linux-clk@vger.kernel.org>,
<linux-gpio@vger.kernel.org>, <jckuo@nvidia.com>,
<josephl@nvidia.com>, <talho@nvidia.com>,
<skomatineni@nvidia.com>, <linux-tegra@vger.kernel.org>,
<linux-kernel@vger.kernel.org>, <mperttunen@nvidia.com>,
<spatra@nvidia.com>, <robh+dt@kernel.org>, <digetx@gmail.com>,
<devicetree@vger.kernel.org>, <rjw@rjwysocki.net>,
<viresh.kumar@linaro.org>, <linux-pm@vger.kernel.org>
Subject: [PATCH v7 12/20] clk: tegra210: Use fence_udelay during PLLU init
Date: Wed, 31 Jul 2019 14:10:55 -0700 [thread overview]
Message-ID: <1564607463-28802-13-git-send-email-skomatineni@nvidia.com> (raw)
In-Reply-To: <1564607463-28802-1-git-send-email-skomatineni@nvidia.com>
This patch uses fence_udelay rather than udelay during PLLU
initialization to ensure writes to clock registers happens before
waiting for specified delay.
Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Sowjanya Komatineni <skomatineni@nvidia.com>
---
drivers/clk/tegra/clk-tegra210.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/drivers/clk/tegra/clk-tegra210.c b/drivers/clk/tegra/clk-tegra210.c
index 4721ee030d1c..998bf60b219a 100644
--- a/drivers/clk/tegra/clk-tegra210.c
+++ b/drivers/clk/tegra/clk-tegra210.c
@@ -2841,7 +2841,7 @@ static int tegra210_enable_pllu(void)
reg = readl_relaxed(clk_base + pllu.params->ext_misc_reg[0]);
reg &= ~BIT(pllu.params->iddq_bit_idx);
writel_relaxed(reg, clk_base + pllu.params->ext_misc_reg[0]);
- udelay(5);
+ fence_udelay(5, clk_base);
reg = readl_relaxed(clk_base + PLLU_BASE);
reg &= ~GENMASK(20, 0);
@@ -2849,7 +2849,7 @@ static int tegra210_enable_pllu(void)
reg |= fentry->n << 8;
reg |= fentry->p << 16;
writel(reg, clk_base + PLLU_BASE);
- udelay(1);
+ fence_udelay(1, clk_base);
reg |= PLL_ENABLE;
writel(reg, clk_base + PLLU_BASE);
@@ -2895,12 +2895,12 @@ static int tegra210_init_pllu(void)
reg = readl_relaxed(clk_base + XUSB_PLL_CFG0);
reg &= ~XUSB_PLL_CFG0_PLLU_LOCK_DLY_MASK;
writel_relaxed(reg, clk_base + XUSB_PLL_CFG0);
- udelay(1);
+ fence_udelay(1, clk_base);
reg = readl_relaxed(clk_base + PLLU_HW_PWRDN_CFG0);
reg |= PLLU_HW_PWRDN_CFG0_SEQ_ENABLE;
writel_relaxed(reg, clk_base + PLLU_HW_PWRDN_CFG0);
- udelay(1);
+ fence_udelay(1, clk_base);
reg = readl_relaxed(clk_base + PLLU_BASE);
reg &= ~PLLU_BASE_CLKENABLE_USB;
--
2.7.4
next prev parent reply other threads:[~2019-07-31 21:11 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-31 21:10 [PATCH v7 00/20] SC7 entry and exit support for Tegra210 Sowjanya Komatineni
2019-07-31 21:10 ` [PATCH v7 01/20] pinctrl: tegra: Add suspend and resume support Sowjanya Komatineni
2019-08-05 9:20 ` Linus Walleij
2019-08-06 21:51 ` Sowjanya Komatineni
2019-08-07 3:40 ` Sowjanya Komatineni
2019-08-07 13:11 ` Linus Walleij
2019-08-05 10:50 ` Dmitry Osipenko
2019-08-05 18:06 ` Sowjanya Komatineni
2019-08-06 17:59 ` Dmitry Osipenko
2019-08-06 21:54 ` Sowjanya Komatineni
2019-07-31 21:10 ` [PATCH v7 02/20] pinctrl: tegra210: Add Tegra210 pinctrl pm ops Sowjanya Komatineni
2019-08-05 9:21 ` Linus Walleij
2019-07-31 21:10 ` [PATCH v7 03/20] clk: tegra: divider: Save and restore divider rate Sowjanya Komatineni
2019-07-31 21:10 ` [PATCH v7 04/20] clk: tegra: pllout: Save and restore pllout context Sowjanya Komatineni
2019-07-31 21:10 ` [PATCH v7 05/20] clk: tegra: pll: Save and restore pll context Sowjanya Komatineni
2019-07-31 21:10 ` [PATCH v7 06/20] clk: tegra: Support for OSC context save and restore Sowjanya Komatineni
2019-07-31 21:10 ` [PATCH v7 07/20] clk: tegra: clk-periph: Add save and restore support Sowjanya Komatineni
2019-07-31 21:10 ` [PATCH v7 08/20] clk: tegra: clk-super: Fix to enable PLLP branches to CPU Sowjanya Komatineni
2019-07-31 21:10 ` [PATCH v7 09/20] clk: tegra: clk-super: Add save and restore support Sowjanya Komatineni
2019-07-31 21:10 ` [PATCH v7 10/20] clk: tegra: clk-dfll: Add suspend and resume support Sowjanya Komatineni
2019-08-01 10:18 ` Dmitry Osipenko
2019-08-01 10:37 ` Dmitry Osipenko
[not found] ` <BYAPR12MB3398C388471BC5811614C8FEC2DE0@BYAPR12MB3398.namprd12.prod.outlook.com>
2019-08-01 17:10 ` Dmitry Osipenko
2019-08-01 17:53 ` Sowjanya Komatineni
2019-07-31 21:10 ` [PATCH v7 11/20] cpufreq: tegra124: " Sowjanya Komatineni
2019-08-01 5:40 ` Viresh Kumar
2019-08-01 17:51 ` Sowjanya Komatineni
2019-08-02 3:41 ` Viresh Kumar
2019-07-31 21:10 ` Sowjanya Komatineni [this message]
2019-07-31 21:10 ` [PATCH v7 13/20] clk: tegra210: " Sowjanya Komatineni
2019-07-31 21:10 ` [PATCH v7 14/20] soc/tegra: pmc: Allow to support more tegras wake Sowjanya Komatineni
2019-07-31 21:10 ` [PATCH v7 15/20] soc/tegra: pmc: Add pmc wake support for tegra210 Sowjanya Komatineni
2019-07-31 21:10 ` [PATCH v7 16/20] arm64: tegra: Enable wake from deep sleep on RTC alarm Sowjanya Komatineni
2019-07-31 21:11 ` [PATCH v7 17/20] soc/tegra: pmc: Configure core power request polarity Sowjanya Komatineni
2019-07-31 21:11 ` [PATCH v7 18/20] soc/tegra: pmc: Configure deep sleep control settings Sowjanya Komatineni
2019-07-31 21:11 ` [PATCH v7 19/20] arm64: dts: tegra210-p2180: Jetson TX1 SC7 timings Sowjanya Komatineni
2019-07-31 21:11 ` [PATCH v7 20/20] arm64: dts: tegra210-p3450: Jetson Nano " Sowjanya Komatineni
-- strict thread matches above, loose matches on Subject: below --
2019-07-31 0:20 [PATCH v7 00/20] SC7 entry and exit support for Tegra210 Sowjanya Komatineni
2019-07-31 0:20 ` [PATCH v7 12/20] clk: tegra210: Use fence_udelay during PLLU init Sowjanya Komatineni
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