diff options
| author | Jeetesh Burman <jburman@nvidia.com> | 2015-06-18 11:20:20 +0530 |
|---|---|---|
| committer | Winnie Hsu <whsu@nvidia.com> | 2015-06-18 15:07:02 -0700 |
| commit | 85d31bca627a4c2027d124a4efa807e3fbf5d4d0 (patch) | |
| tree | 02588706f3e808b1fcccb79ddc18fd1a189dad9f /drivers | |
| parent | 936b87435df999e93e6cf7d09bbb988761bcd8e9 (diff) | |
Revert "mmc: tegra: Use 100000 precision instead of 1000"
This reverts commit 3c5f4d1060669ec73dc0ceb4e9a876a55a89c5eb.
Signed-off-by: Jeetesh Burman <jburman@nvidia.com>
Change-Id: Ic0e3eb4bb892e69dbd808c1d55721290c561ac7c
Reviewed-on: http://git-master/r/759475
GVS: Gerrit_Virtual_Submit
Reviewed-by: Winnie Hsu <whsu@nvidia.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/mmc/host/sdhci-tegra.c | 36 |
1 files changed, 15 insertions, 21 deletions
diff --git a/drivers/mmc/host/sdhci-tegra.c b/drivers/mmc/host/sdhci-tegra.c index 6f2b566a1b67..30a44e832155 100644 --- a/drivers/mmc/host/sdhci-tegra.c +++ b/drivers/mmc/host/sdhci-tegra.c @@ -228,7 +228,6 @@ #define TUNING_RETRIES 1 #define DFS_FREQ_COUNT 2 #define NEG_MAR_CHK_WIN_COUNT 2 -#define PRECISION_FOR_ESTIMATE 100000 /* Tuning core voltage requirements */ #define NOMINAL_VCORE_TUN BIT(0) #define BOOT_VCORE_TUN BIT(1) @@ -2316,22 +2315,19 @@ static int calculate_estimated_tuning_values(int speedo, } else if (voltage_mv == t2t_coeffs->vmax) { est_values->t2t_vmax = vmax_t2t; } else { - vmax_t2t = PRECISION_FOR_ESTIMATE / vmax_t2t; - vmin_t2t = PRECISION_FOR_ESTIMATE / vmin_t2t; + vmax_t2t = 1000 / vmax_t2t; + vmin_t2t = 1000 / vmin_t2t; /* - * For any intermediate voltage between 0.95V and max vcore, + * For any intermediate voltage between 0.95V and 1.25V, * calculate the slope and intercept from the T2T and tap hole - * values of 0.95V and max vcore and use them to calculate the + * values of 0.95V and 1.25V and use them to calculate the * actual values. 1/T2T is a linear function of voltage. */ - slope = ((vmax_t2t - vmin_t2t) * PRECISION_FOR_ESTIMATE) / - (t2t_coeffs->vmax - t2t_coeffs->vmin); - inpt = (vmax_t2t * PRECISION_FOR_ESTIMATE - - (slope * t2t_coeffs->vmax)) / PRECISION_FOR_ESTIMATE; - est_values->t2t_vmax = ((slope * voltage_mv) / - PRECISION_FOR_ESTIMATE + inpt); - est_values->t2t_vmax = (PRECISION_FOR_ESTIMATE / - est_values->t2t_vmax); + slope = ((vmax_t2t - vmin_t2t) * 1000) / + (t2t_coeffs->vmax - t2t_coeffs->vmin); + inpt = (vmax_t2t * 1000 - (slope * t2t_coeffs->vmax)) / 1000; + est_values->t2t_vmax = (slope * voltage_mv) / 1000 + inpt; + est_values->t2t_vmax = (1000 / est_values->t2t_vmax); } /* Est_UI = (1000000/freq_MHz)/Est_T2T_Vmax */ @@ -2352,17 +2348,15 @@ static int calculate_estimated_tuning_values(int speedo, est_values->vmax_thole = vmax_thole; } else { /* - * For any intermediate voltage between 0.95V and max vcore, + * For any intermediate voltage between 0.95V and 1.25V, * calculate the slope and intercept from the t2t and tap hole - * values of 0.95V and max vcore and use them to calculate the + * values of 0.95V and 1.25V and use them to calculate the * actual values. Tap hole is a linear function of voltage. */ - slope = ((vmax_thole - vmin_thole) * PRECISION_FOR_ESTIMATE) / - (t2t_coeffs->vmax - t2t_coeffs->vmin); - inpt = (vmax_thole * PRECISION_FOR_ESTIMATE - - (slope * t2t_coeffs->vmax)) / PRECISION_FOR_ESTIMATE; - est_values->vmax_thole = (slope * voltage_mv) / - PRECISION_FOR_ESTIMATE + inpt; + slope = ((vmax_thole - vmin_thole) * 1000) / + (t2t_coeffs->vmax - t2t_coeffs->vmin); + inpt = (vmax_thole * 1000 - (slope * t2t_coeffs->vmax)) / 1000; + est_values->vmax_thole = (slope * voltage_mv) / 1000 + inpt; } est_values->vmin_thole = vmin_thole; |