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staging: rtl8188eu: remove efuse write support 

This driver does not need write access to the rtl1888eu chip's efuses.
Remove the code to set the voltages for writing the efuses.

Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Link: https://lore.kernel.org/r/20210718173610.894-6-martin@kaiser.cx
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Martin Kaiser 2021-07-18 19:36:06 +02:00 committed by Greg Kroah-Hartman
parent 264d306464
commit dff70f7fbe
1 changed files with 3 additions and 29 deletions
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32
drivers/staging/rtl8188eu/core/rtw_efuse.c
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@ -16,18 +16,8 @@
#define REG_EFUSE_CTRL 0x0030
#define EFUSE_CTRL REG_EFUSE_CTRL /* E-Fuse Control. */
enum{
VOLTAGE_V25 = 0x03,
LDOE25_SHIFT = 28,
};
/*
* When we want to enable write operation, we should change to pwr on state.
* When we stop write, we should switch to 500k mode and disable LDO 2.5V.
*/
static void efuse_power_switch(struct adapter *pAdapter, u8 write, u8 pwrstate)
static void efuse_power_switch(struct adapter *pAdapter, u8 pwrstate)
{
u8 tempval;
u16 tmpv16;
if (pwrstate) {
@ -52,22 +42,8 @@ static void efuse_power_switch(struct adapter *pAdapter, u8 write, u8 pwrstate)
tmpv16 |= (LOADER_CLK_EN | ANA8M);
usb_write16(pAdapter, REG_SYS_CLKR, tmpv16);
}
if (write) {
/* Enable LDO 2.5V before read/write action */
tempval = usb_read8(pAdapter, EFUSE_TEST + 3);
tempval &= 0x0F;
tempval |= (VOLTAGE_V25 << 4);
usb_write8(pAdapter, EFUSE_TEST + 3, (tempval | 0x80));
}
} else {
usb_write8(pAdapter, REG_EFUSE_ACCESS, EFUSE_ACCESS_OFF);
if (write) {
/* Disable LDO 2.5V after read/write action */
tempval = usb_read8(pAdapter, EFUSE_TEST + 3);
usb_write8(pAdapter, EFUSE_TEST + 3, (tempval & 0x7F));
}
}
}
@ -857,11 +833,9 @@ void efuse_WordEnableDataRead(u8 word_en, u8 *sourdata, u8 *targetdata)
/* Read All Efuse content */
static void Efuse_ReadAllMap(struct adapter *pAdapter, u8 *Efuse)
{
efuse_power_switch(pAdapter, false, true);
efuse_power_switch(pAdapter, true);
efuse_ReadEFuse(pAdapter, 0, EFUSE_MAP_LEN_88E, Efuse);
efuse_power_switch(pAdapter, false, false);
efuse_power_switch(pAdapter, false);
}
/* Transfer current EFUSE content to shadow init and modify map. */