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From: Miquel Raynal <miquel.raynal@bootlin.com>
To: Michael Turquette <mturquette@baylibre.com>,
	Stephen Boyd <sboyd@kernel.org>,
	Russell King <linux@armlinux.org.uk>
Cc: linux-clk@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	Thomas Petazzoni <thomas.petazzoni@bootlin.com>,
	Antoine Tenart <antoine.tenart@bootlin.com>,
	Maxime Chevallier <maxime.chevallier@bootlin.com>,
	Gregory Clement <gregory.clement@bootlin.com>,
	Nadav Haklai <nadavh@marvell.com>,
	Miquel Raynal <miquel.raynal@bootlin.com>
Subject: [PATCH v3 3/4] clk: mvebu: armada-37xx-tbg: fill the device entry when registering the clocks
Date: Tue,  4 Dec 2018 20:24:39 +0100
Message-ID: <20181204192440.12125-4-miquel.raynal@bootlin.com> (raw)
In-Reply-To: <20181204192440.12125-1-miquel.raynal@bootlin.com>

So far the clk_hw_register_fixed_factor() calls are not providing any
device structure. While doing so is harmless for regular use, the
missing device structure may be a problem for suspend to RAM support.

Since, device links have been added to clocks, links created during
probe will enforce the suspend/resume orders. When the device is
missing during the registration, no link can be established, hence the
order between parent and child clocks are not enforced.

Adding the device structure here will create a link between the 4 TBG
clocks (registered by this driver) and:
* their parent clock: XTAL,
* their child clocks: several 'periph' clock.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
---
 drivers/clk/mvebu/armada-37xx-tbg.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/clk/mvebu/armada-37xx-tbg.c b/drivers/clk/mvebu/armada-37xx-tbg.c
index ee272d4d8c24..78de057a2406 100644
--- a/drivers/clk/mvebu/armada-37xx-tbg.c
+++ b/drivers/clk/mvebu/armada-37xx-tbg.c
@@ -116,8 +116,10 @@ static int armada_3700_tbg_clock_probe(struct platform_device *pdev)
 		name = tbg[i].name;
 		mult = tbg_get_mult(reg, &tbg[i]);
 		div = tbg_get_div(reg, &tbg[i]);
-		hw_tbg_data->hws[i] = clk_hw_register_fixed_factor(NULL, name,
-						parent_name, 0, mult, div);
+		hw_tbg_data->hws[i] = clk_hw_register_fixed_factor(dev, name,
+								   parent_name,
+								   0, mult,
+								   div);
 		if (IS_ERR(hw_tbg_data->hws[i]))
 			dev_err(dev, "Can't register TBG clock %s\n", name);
 	}
-- 
2.19.1


  parent reply index

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-12-04 19:24 [PATCH v3 0/4] Add device links to clocks Miquel Raynal
2018-12-04 19:24 ` [PATCH v3 1/4] clk: core: clarify the check for runtime PM Miquel Raynal
2018-12-19  0:03   ` Stephen Boyd
2018-12-19  8:03     ` Miquel Raynal
2018-12-20 21:09       ` Stephen Boyd
2019-01-02 10:55         ` Miquel Raynal
2018-12-04 19:24 ` [PATCH v3 2/4] clk: core: link consumer with clock driver Miquel Raynal
2018-12-11 17:12   ` Stephen Boyd
2018-12-17 14:24     ` Miquel Raynal
2019-01-04 15:54     ` Miquel Raynal
2019-01-25 21:28       ` Stephen Boyd
2019-01-28 10:06         ` Miquel Raynal
2018-12-04 19:24 ` Miquel Raynal [this message]
2018-12-04 19:24 ` [PATCH v3 4/4] clk: mvebu: armada-37xx-xtal: fill the device entry when registering the clock Miquel Raynal

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