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| author | Wei WANG <wei_wang@realsil.com.cn> | 2013-01-23 09:51:06 +0800 |
|---|---|---|
| committer | Samuel Ortiz <sameo@linux.intel.com> | 2013-01-27 01:30:20 +0100 |
| commit | ab4e8f8b7bdfeff0c961fdbbdacb262d68f094c0 (patch) | |
| tree | 543440d2656343141c14e565e795a655378a0f72 /drivers/mfd/rtl8411.c | |
| parent | ef85e736b1052d8c1e56990f0d08b6fce7cdbe41 (diff) | |
| download | lwn-ab4e8f8b7bdfeff0c961fdbbdacb262d68f094c0.tar.gz lwn-ab4e8f8b7bdfeff0c961fdbbdacb262d68f094c0.zip | |
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.c | 13 |
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: |