linux-kernel - Re: [PATCH v7 12/34] i2c: tegra: Use clk-bulk helpers

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Date:   Mon, 21 Sep 2020 10:19:15 +0000
From:   Thierry Reding <treding@...dia.com>
To:     Dmitry Osipenko <digetx@...il.com>
CC:     Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Laxman Dewangan <ldewangan@...dia.com>,
        Wolfram Sang <wsa@...-dreams.de>,
        Michał Mirosław <mirq-linux@...e.qmqm.pl>,
        Andy Shevchenko <andy.shevchenko@...il.com>,
        <linux-i2c@...r.kernel.org>, <linux-tegra@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v7 12/34] i2c: tegra: Use clk-bulk helpers

On Wed, 09 Sep 2020 01:39:44 +0300, Dmitry Osipenko wrote:
> Use clk-bulk helpers and factor out clocks initialization into separate
> function in order to make code cleaner.
> 
> The clocks initialization now performed after reset-control initialization
> in order to avoid a noisy -PROBE_DEFER errors on T186+ from the clk-bulk
> helper which doesn't silence this error code. Hence reset_control_get()
> now may return -EPROBE_DEFER on newer Tegra SoCs because they use BPMP
> driver that provides reset controls and BPMP doesn't come up early during
> boot. Previously rst was protected by the clocks retrieval and now this
> patch makes dev_err_probe() to be used for the rst error handling.
> 
> Suggested-by: Andy Shevchenko <andy.shevchenko@...il.com>
> Signed-off-by: Dmitry Osipenko <digetx@...il.com>
> ---
>  drivers/i2c/busses/i2c-tegra.c | 187 ++++++++++++---------------------
>  1 file changed, 67 insertions(+), 120 deletions(-)

Tested-by: Thierry Reding <treding@...dia.com>