linux-kernel - [PATCH 4.1 05/78] clk: pxa: pxa3xx: fix CKEN register access

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Message-Id: <20150911224607.424592083@linuxfoundation.org>
Date:	Fri, 11 Sep 2015 15:49:06 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Robert Jarzmik <robert.jarzmik@...e.fr>,
	Stephen Boyd <sboyd@...eaurora.org>
Subject: [PATCH 4.1 05/78] clk: pxa: pxa3xx: fix CKEN register access

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

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

From: Robert Jarzmik <robert.jarzmik@...e.fr>

commit b93028c9af807b9474789e6aba34a6135b6cb708 upstream.

Clocks 0 to 31 are on CKENA, and not CKENB. The clock register names
were inadequately inverted. As a consequence, all clock operations were
happening on CKENB, because almost all but 2 clocks are on CKENA.

As the clocks were activated by the bootloader in the former tests, it
escaped the testing that the wrong clock gate was manipulated. The error
was revealed by changing the pxa3xx-nand driver to a module, where upon
unloading, the wrong clock was disabled in CKENB.

Fixes: 9bbb8a338fb2 ("clk: pxa: add pxa3xx clock driver")
Signed-off-by: Robert Jarzmik <robert.jarzmik@...e.fr>
Signed-off-by: Stephen Boyd <sboyd@...eaurora.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/clk/pxa/clk-pxa3xx.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/clk/pxa/clk-pxa3xx.c
+++ b/drivers/clk/pxa/clk-pxa3xx.c
@@ -126,7 +126,7 @@ PARENTS(pxa3xx_ac97_bus) = { "ring_osc_6
 PARENTS(pxa3xx_sbus) = { "ring_osc_60mhz", "system_bus" };
 PARENTS(pxa3xx_smemcbus) = { "ring_osc_60mhz", "smemc" };
 
-#define CKEN_AB(bit) ((CKEN_ ## bit > 31) ? &CKENA : &CKENB)
+#define CKEN_AB(bit) ((CKEN_ ## bit > 31) ? &CKENB : &CKENA)
 #define PXA3XX_CKEN(dev_id, con_id, parents, mult_lp, div_lp, mult_hp,	\
 		    div_hp, bit, is_lp, flags)				\
 	PXA_CKEN(dev_id, con_id, bit, parents, mult_lp, div_lp,		\


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