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authorWei WANG <wei_wang@realsil.com.cn>2013-08-21 09:46:25 +0800
committerSamuel Ortiz <sameo@linux.intel.com>2013-08-30 14:24:07 +0200
commit84d72f9cc21d6e41c620dd34b8248734cd02d995 (patch)
treef84a291737af9885fb573adc4844fc4e0c0c74c5 /drivers/mfd/rts5227.c
parent828fa1e60117535d9b1e1b09444842ae66e8424d (diff)
mfd: mmc: rtsx: Change default tx phase
The default phase can meet most cards' requirement, but it is not the optimal one. In some extreme situation, the rx phase point produced by the following tuning process will drift quite a distance. Before tuning UHS card, this patch will set a more proper initial tx phase point, which is calculated from statistic data, and can achieve a much better tx signal quality. Signed-off-by: Wei WANG <wei_wang@realsil.com.cn> Acked-by: Lee Jones <lee.jones@linaro.org> Acked-by: Chris Ball <cjb@laptop.org> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Diffstat (limited to 'drivers/mfd/rts5227.c')
-rw-r--r--drivers/mfd/rts5227.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/mfd/rts5227.c b/drivers/mfd/rts5227.c
index d7cae82720a4..c001151378b2 100644
--- a/drivers/mfd/rts5227.c
+++ b/drivers/mfd/rts5227.c
@@ -291,6 +291,8 @@ void rts5227_init_params(struct rtsx_pcr *pcr)
pcr->sd30_drive_sel_1v8 = CFG_DRIVER_TYPE_B;
pcr->sd30_drive_sel_3v3 = CFG_DRIVER_TYPE_B;
pcr->aspm_en = ASPM_L1_EN;
+ pcr->tx_initial_phase = SET_CLOCK_PHASE(27, 27, 15);
+ pcr->rx_initial_phase = SET_CLOCK_PHASE(30, 7, 7);
pcr->sd_pull_ctl_enable_tbl = rts5227_sd_pull_ctl_enable_tbl;
pcr->sd_pull_ctl_disable_tbl = rts5227_sd_pull_ctl_disable_tbl;