linux-kernel - [PATCH 4.4 310/342] ARM: OMAP2+: Fix onenand initialization to avoid filesystem corruption

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Date:	Tue, 01 Mar 2016 23:55:28 +0000
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	<linux-kernel@...r.kernel.org>
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	<stable@...r.kernel.org>,
	Ivaylo Dimitrov <ivo.g.dimitrov.75@...il.com>,
	Aaro Koskinen <aaro.koskinen@....fi>,
	Tony Lindgren <tony@...mide.com>
Subject: [PATCH 4.4 310/342] ARM: OMAP2+: Fix onenand initialization to avoid filesystem corruption

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

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

From: Ivaylo Dimitrov <ivo.g.dimitrov.75@...il.com>

commit 3f315c5b850fa7aff73f50de8e316b98f611a32b upstream.

Commit e7b11dc7b77b ("ARM: OMAP2+: Fix onenand rate detection to avoid
filesystem corruption") partially fixed onenand configuration when GPMC
module is reset. Finish the job by also providing the correct values in
ONENAND_REG_SYS_CFG1 register.

Fixes: e7b11dc7b77b ("ARM: OMAP2+: Fix onenand rate detection to avoid
filesystem corruption")
Signed-off-by: Ivaylo Dimitrov <ivo.g.dimitrov.75@...il.com>
Tested-by: Aaro Koskinen <aaro.koskinen@....fi>
Signed-off-by: Tony Lindgren <tony@...mide.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 arch/arm/mach-omap2/gpmc-onenand.c |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

--- a/arch/arm/mach-omap2/gpmc-onenand.c
+++ b/arch/arm/mach-omap2/gpmc-onenand.c
@@ -101,10 +101,8 @@ static void omap2_onenand_set_async_mode
 
 static void set_onenand_cfg(void __iomem *onenand_base)
 {
-	u32 reg;
+	u32 reg = ONENAND_SYS_CFG1_RDY | ONENAND_SYS_CFG1_INT;
 
-	reg = readw(onenand_base + ONENAND_REG_SYS_CFG1);
-	reg &= ~((0x7 << ONENAND_SYS_CFG1_BRL_SHIFT) | (0x7 << 9));
 	reg |=	(latency << ONENAND_SYS_CFG1_BRL_SHIFT) |
 		ONENAND_SYS_CFG1_BL_16;
 	if (onenand_flags & ONENAND_FLAG_SYNCREAD)
@@ -123,6 +121,7 @@ static void set_onenand_cfg(void __iomem
 		reg |= ONENAND_SYS_CFG1_VHF;
 	else
 		reg &= ~ONENAND_SYS_CFG1_VHF;
+
 	writew(reg, onenand_base + ONENAND_REG_SYS_CFG1);
 }
 
@@ -289,6 +288,7 @@ static int omap2_onenand_setup_async(voi
 		}
 	}
 
+	onenand_async.sync_write = true;
 	omap2_onenand_calc_async_timings(&t);
 
 	ret = gpmc_cs_program_settings(gpmc_onenand_data->cs, &onenand_async);