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authorWei WANG <wei_wang@realsil.com.cn>2013-01-23 09:51:06 +0800
committerSamuel Ortiz <sameo@linux.intel.com>2013-01-27 01:30:20 +0100
commitab4e8f8b7bdfeff0c961fdbbdacb262d68f094c0 (patch)
tree543440d2656343141c14e565e795a655378a0f72 /drivers/mfd/rtl8411.c
parentef85e736b1052d8c1e56990f0d08b6fce7cdbe41 (diff)
downloadlinux-ab4e8f8b7bdfeff0c961fdbbdacb262d68f094c0.tar.bz2
mfd: rtsx: Add clock divider hook
Add callback function conv_clk_and_div_n to convert between SSC clock and its divider N. For rtl8411, the formula to calculate SSC clock divider N is different with the other card reader models. Signed-off-by: Wei WANG <wei_wang@realsil.com.cn> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Diffstat (limited to 'drivers/mfd/rtl8411.c')
-rw-r--r--drivers/mfd/rtl8411.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/mfd/rtl8411.c b/drivers/mfd/rtl8411.c
index 5058ba8dec3b..3d3b4addf81a 100644
--- a/drivers/mfd/rtl8411.c
+++ b/drivers/mfd/rtl8411.c
@@ -178,6 +178,18 @@ static unsigned int rtl8411_cd_deglitch(struct rtsx_pcr *pcr)
return card_exist;
}
+static int rtl8411_conv_clk_and_div_n(int input, int dir)
+{
+ int output;
+
+ if (dir == CLK_TO_DIV_N)
+ output = input * 4 / 5 - 2;
+ else
+ output = (input + 2) * 5 / 4;
+
+ return output;
+}
+
static const struct pcr_ops rtl8411_pcr_ops = {
.extra_init_hw = rtl8411_extra_init_hw,
.optimize_phy = NULL,
@@ -189,6 +201,7 @@ static const struct pcr_ops rtl8411_pcr_ops = {
.card_power_off = rtl8411_card_power_off,
.switch_output_voltage = rtl8411_switch_output_voltage,
.cd_deglitch = rtl8411_cd_deglitch,
+ .conv_clk_and_div_n = rtl8411_conv_clk_and_div_n,
};
/* SD Pull Control Enable: