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NFC: trf7970a: Allow different Modulator and SYS_CLK Control register values

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Currently the driver writes the same value to the 'Modulator and SYS_CLK
Control' register no matter what RF technology is being used. That works
for now but new RF technologies (e.g., ISO/IEC 14443-B) will require
different values to be written to that register. To support this, add a
member to the trf7970a structure which is set by the RF technology handling
code and used by the framing code when it writes to that register.

Signed-off-by: Mark A. Greer <mgreer@animalcreek.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Mark A. Greer 2014-03-25 08:54:35 -07:00 committed by Samuel Ortiz
parent a0822a7e3b
commit 12e9ade309
1 changed files with 4 additions and 1 deletions
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5
drivers/nfc/trf7970a.c
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@ -338,6 +338,7 @@ struct trf7970a {
void *cb_arg;
u8 iso_ctrl;
u8 iso_ctrl_tech;
u8 modulator_sys_clk_ctrl;
u8 special_fcn_reg1;
int technology;
int framing;
@ -887,9 +888,11 @@ static int trf7970a_config_rf_tech(struct trf7970a *trf, int tech)
switch (tech) {
case NFC_DIGITAL_RF_TECH_106A:
trf->iso_ctrl_tech = TRF7970A_ISO_CTRL_14443A_106;
trf->modulator_sys_clk_ctrl = TRF7970A_MODULATOR_DEPTH_OOK;
break;
case NFC_DIGITAL_RF_TECH_ISO15693:
trf->iso_ctrl_tech = TRF7970A_ISO_CTRL_15693_SGL_1OF4_2648;
trf->modulator_sys_clk_ctrl = TRF7970A_MODULATOR_DEPTH_OOK;
break;
default:
dev_dbg(trf->dev, "Unsupported rf technology: %d\n", tech);
@ -940,7 +943,7 @@ static int trf7970a_config_framing(struct trf7970a *trf, int framing)
trf->iso_ctrl = iso_ctrl;
ret = trf7970a_write(trf, TRF7970A_MODULATOR_SYS_CLK_CTRL,
TRF7970A_MODULATOR_DEPTH_OOK);
trf->modulator_sys_clk_ctrl);
if (ret)
return ret;
}