From e76f7558d89868bc295fe1220c2e5a0a82f698f6 Mon Sep 17 00:00:00 2001 From: Mark Brown Date: Mon, 20 Oct 2008 23:58:50 +0200 Subject: 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 Signed-off-by: Samuel Ortiz --- drivers/mfd/wm8350-core.c | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'drivers/mfd/wm8350-core.c') diff --git a/drivers/mfd/wm8350-core.c b/drivers/mfd/wm8350-core.c index fbe22fb7847..0d47fb9e4b3 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]; -- cgit v1.2.3