linux-kernel - [PATCH 4.14 034/115] pwm: meson: Fix mux clock names

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Date:   Thu, 13 Sep 2018 15:30:54 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Jerome Brunet <jbrunet@...libre.com>,
        Neil Armstrong <narmstrong@...libre.com>,
        Thierry Reding <thierry.reding@...il.com>,
        Sasha Levin <alexander.levin@...rosoft.com>
Subject: [PATCH 4.14 034/115] pwm: meson: Fix mux clock names

4.14-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Jerome Brunet <jbrunet@...libre.com>

[ Upstream commit b96e9eb62841c519ba1db32d036628be3cdef91f ]

Current clock name looks like this:
/soc/bus@...00000/pwm@...00#mux0

This is bad because CCF uses the clock to create a directory in clk debugfs.
With such name, the directory creation (silently) fails and the debugfs
entry end up being created at the debugfs root.

With this change, the clock name will now be:
ffd1b000.pwm#mux0

This matches the clock naming scheme used in the ethernet and mmc driver.
It also fixes the problem with debugfs.

Fixes: 36af66a79056 ("pwm: Convert to using %pOF instead of full_name")
Signed-off-by: Jerome Brunet <jbrunet@...libre.com>
Acked-by: Neil Armstrong <narmstrong@...libre.com>
Signed-off-by: Thierry Reding <thierry.reding@...il.com>
Signed-off-by: Sasha Levin <alexander.levin@...rosoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/pwm/pwm-meson.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

--- a/drivers/pwm/pwm-meson.c
+++ b/drivers/pwm/pwm-meson.c
@@ -432,7 +432,6 @@ static int meson_pwm_init_channels(struc
 				   struct meson_pwm_channel *channels)
 {
 	struct device *dev = meson->chip.dev;
-	struct device_node *np = dev->of_node;
 	struct clk_init_data init;
 	unsigned int i;
 	char name[255];
@@ -441,7 +440,7 @@ static int meson_pwm_init_channels(struc
 	for (i = 0; i < meson->chip.npwm; i++) {
 		struct meson_pwm_channel *channel = &channels[i];
 
-		snprintf(name, sizeof(name), "%pOF#mux%u", np, i);
+		snprintf(name, sizeof(name), "%s#mux%u", dev_name(dev), i);
 
 		init.name = name;
 		init.ops = &clk_mux_ops;