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[86.49.107.50]) by smtp.gmail.com with ESMTPSA id o197sm8482585wmd.9.2017.07.09.06.28.36 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Sun, 09 Jul 2017 06:28:37 -0700 (PDT) From: Marek Vasut X-Google-Original-From: Marek Vasut To: linux-clk@vger.kernel.org Cc: Marek Vasut , Stephen Boyd , Alexey Firago , Michael Turquette , Laurent Pinchart , linux-renesas-soc@vger.kernel.org Subject: [PATCH V3 3/8] clk: vc5: Do not warn about disabled output buffer input muxes Date: Sun, 9 Jul 2017 15:28:09 +0200 Message-Id: <20170709132814.2339-3-marek.vasut+renesas@gmail.com> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20170709132814.2339-1-marek.vasut+renesas@gmail.com> References: <20170709132814.2339-1-marek.vasut+renesas@gmail.com> Sender: linux-renesas-soc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-renesas-soc@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The output buffer input mux can be configured in either of three states -- disabled, input from FOD, input from previous output. If the output buffer input mux is set to disabled, the code in vc5_clk_out_get_parent() would consider this an invalid setting and warn about it, which is not necessarily the case. In case the output buffer input mux is disabled, default to input from FOD to have some parent and don't print the warning. Signed-off-by: Marek Vasut Cc: Stephen Boyd Cc: Alexey Firago Cc: Michael Turquette Cc: Laurent Pinchart Cc: linux-renesas-soc@vger.kernel.org Tested-by: Laurent Pinchart on Salvator-XS with the display LVDS output. --- V2: Drop chunk adding useless newline V3: None --- drivers/clk/clk-versaclock5.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/clk/clk-versaclock5.c b/drivers/clk/clk-versaclock5.c index d835d48cf14d..248689d89632 100644 --- a/drivers/clk/clk-versaclock5.c +++ b/drivers/clk/clk-versaclock5.c @@ -541,6 +541,9 @@ static unsigned char vc5_clk_out_get_parent(struct clk_hw *hw) regmap_read(vc5->regmap, VC5_OUT_DIV_CONTROL(hwdata->num), &src); src &= mask; + if (src == 0) /* Input mux set to DISABLED */ + return 0; + if ((src & fodclkmask) == VC5_OUT_DIV_CONTROL_EN_FOD) return 0;