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 v9 01/22] pinctrl: tegra: Fix write barrier placement in pmx_writel
Date: Fri, 16 Aug 2019 12:41:46 -0700 [thread overview]
Message-ID: <1565984527-5272-2-git-send-email-skomatineni@nvidia.com> (raw)
In-Reply-To: <1565984527-5272-1-git-send-email-skomatineni@nvidia.com>
pmx_writel uses writel which inserts write barrier before the
register write.
This patch has fix to replace writel with writel_relaxed followed
by a readback and memory barrier to ensure write operation is
completed for successful pinctrl change.
Acked-by: Thierry Reding <treding@nvidia.com>
Reviewed-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Sowjanya Komatineni <skomatineni@nvidia.com>
---
drivers/pinctrl/tegra/pinctrl-tegra.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/pinctrl/tegra/pinctrl-tegra.c b/drivers/pinctrl/tegra/pinctrl-tegra.c
index e3a237534281..5e3c00137d71 100644
--- a/drivers/pinctrl/tegra/pinctrl-tegra.c
+++ b/drivers/pinctrl/tegra/pinctrl-tegra.c
@@ -32,7 +32,9 @@ static inline u32 pmx_readl(struct tegra_pmx *pmx, u32 bank, u32 reg)
static inline void pmx_writel(struct tegra_pmx *pmx, u32 val, u32 bank, u32 reg)
{
- writel(val, pmx->regs[bank] + reg);
+ writel_relaxed(val, pmx->regs[bank] + reg);
+ /* make sure pinmux register write completed */
+ pmx_readl(pmx, bank, reg);
}
static int tegra_pinctrl_get_groups_count(struct pinctrl_dev *pctldev)
--
2.7.4
next prev parent reply other threads:[~2019-08-16 19:44 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-16 19:41 [PATCH v9 00/22] SC7 entry and exit support for Tegra210 Sowjanya Komatineni
2019-08-16 19:41 ` Sowjanya Komatineni [this message]
2019-08-18 22:20 ` [PATCH v9 01/22] pinctrl: tegra: Fix write barrier placement in pmx_writel Linus Walleij
2019-08-16 19:41 ` [PATCH v9 02/22] pinctrl: tegra: Flush pinctrl writes during resume Sowjanya Komatineni
2019-08-18 22:20 ` Linus Walleij
2019-08-16 19:41 ` [PATCH v9 03/22] clk: tegra: divider: Save and restore divider rate Sowjanya Komatineni
2019-08-16 19:41 ` [PATCH v9 04/22] clk: tegra: pllout: Save and restore pllout context Sowjanya Komatineni
2019-08-16 19:41 ` [PATCH v9 05/22] clk: tegra: pll: Save and restore pll context Sowjanya Komatineni
2019-08-16 19:41 ` [PATCH v9 06/22] clk: tegra: Support for OSC context save and restore Sowjanya Komatineni
2019-08-16 19:41 ` [PATCH v9 07/22] clk: Add API to get index of the clock parent Sowjanya Komatineni
2019-11-06 23:10 ` Stephen Boyd
2019-11-07 0:54 ` Dmitry Osipenko
2019-11-07 15:21 ` Thierry Reding
2019-11-07 19:19 ` Stephen Boyd
2019-11-08 10:11 ` Thierry Reding
2019-11-08 18:12 ` Stephen Boyd
2019-11-08 18:55 ` Thierry Reding
2019-11-08 21:15 ` Stephen Boyd
2019-08-16 19:41 ` [PATCH v9 08/22] clk: tegra: periph: Add restore_context support Sowjanya Komatineni
2019-08-16 19:41 ` [PATCH v9 09/22] clk: tegra: clk-super: Fix to enable PLLP branches to CPU Sowjanya Komatineni
2019-08-16 19:41 ` [PATCH v9 10/22] clk: tegra: clk-super: Add restore-context support Sowjanya Komatineni
2019-08-16 19:41 ` [PATCH v9 11/22] clk: tegra: clk-dfll: Add suspend and resume support Sowjanya Komatineni
2019-11-08 21:20 ` Stephen Boyd
2019-11-08 23:38 ` Dmitry Osipenko
2019-08-16 19:41 ` [PATCH v9 12/22] cpufreq: tegra124: " Sowjanya Komatineni
2019-11-02 14:42 ` Thierry Reding
2019-08-16 19:41 ` [PATCH v9 13/22] clk: tegra210: Use fence_udelay during PLLU init Sowjanya Komatineni
2019-08-16 19:41 ` [PATCH v9 14/22] clk: tegra: Share clk and rst register defines with Tegra clock driver Sowjanya Komatineni
2019-08-16 19:42 ` [PATCH v9 15/22] clk: tegra210: Add suspend and resume support Sowjanya Komatineni
2019-08-19 16:47 ` Dmitry Osipenko
2019-08-16 19:42 ` [PATCH v9 16/22] soc/tegra: pmc: Allow to support more tegras wake Sowjanya Komatineni
2019-08-16 19:42 ` [PATCH v9 17/22] soc/tegra: pmc: Add pmc wake support for tegra210 Sowjanya Komatineni
2019-08-16 19:42 ` [PATCH v9 18/22] arm64: tegra: Enable wake from deep sleep on RTC alarm Sowjanya Komatineni
2019-08-16 19:42 ` [PATCH v9 19/22] soc/tegra: pmc: Configure core power request polarity Sowjanya Komatineni
2019-08-16 19:42 ` [PATCH v9 20/22] soc/tegra: pmc: Configure deep sleep control settings Sowjanya Komatineni
2019-08-19 16:48 ` Dmitry Osipenko
2019-08-19 18:20 ` Sowjanya Komatineni
2019-08-19 19:07 ` Sowjanya Komatineni
2019-08-19 19:33 ` Dmitry Osipenko
2019-08-16 19:42 ` [PATCH v9 21/22] arm64: dts: tegra210-p2180: Jetson TX1 SC7 timings Sowjanya Komatineni
2019-08-16 19:42 ` [PATCH v9 22/22] arm64: dts: tegra210-p3450: Jetson Nano " Sowjanya Komatineni
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