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authorMark Brown <broonie@opensource.wolfsonmicro.com>2008-10-20 23:58:50 +0200
committerSamuel Ortiz <samuel@sortiz.org>2008-10-22 01:19:40 +0200
commite76f7558d89868bc295fe1220c2e5a0a82f698f6 (patch)
treed53c1c06e9c40dcf6b380d3fb182a224f425ba0c /drivers/mfd
parent799f9e3267b0938c8059ed78d7e39e00b6aa6bd2 (diff)
downloadop-kernel-dev-e76f7558d89868bc295fe1220c2e5a0a82f698f6.zip
op-kernel-dev-e76f7558d89868bc295fe1220c2e5a0a82f698f6.tar.gz
mfd: Don't store volatile bits in WM8350 register cache
This makes the contents of the cache clearer and fixes incorrect initialisation of the cache for partially volatile registers. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Samuel Ortiz <sameo@openedhand.com>
Diffstat (limited to 'drivers/mfd')
-rw-r--r--drivers/mfd/wm8350-core.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/mfd/wm8350-core.c b/drivers/mfd/wm8350-core.c
index fbe22fb..0d47fb9 100644
--- a/drivers/mfd/wm8350-core.c
+++ b/drivers/mfd/wm8350-core.c
@@ -183,6 +183,9 @@ static int wm8350_write(struct wm8350 *wm8350, u8 reg, int num_regs, u16 *src)
(wm8350->reg_cache[i] & ~wm8350_reg_io_map[i].writable)
| src[i - reg];
+ /* Don't store volatile bits */
+ wm8350->reg_cache[i] &= ~wm8350_reg_io_map[i].vol;
+
src[i - reg] = cpu_to_be16(src[i - reg]);
}
@@ -1120,6 +1123,7 @@ static int wm8350_create_cache(struct wm8350 *wm8350, int mode)
}
value = be16_to_cpu(value);
value &= wm8350_reg_io_map[i].readable;
+ value &= ~wm8350_reg_io_map[i].vol;
wm8350->reg_cache[i] = value;
} else
wm8350->reg_cache[i] = reg_map[i];
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