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i2c: pasemi: Move common reset code to own function 

Split out common reset call to its own function so that we
can later add support for selecting the clock frequency
and an additional enable bit found in newer revisions.

Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Sven Peter <sven@svenpeter.dev>
Acked-by: Olof Johansson <olof@lixom.net>
Tested-by: Christian Zigotzky <chzigotzky@xenosoft.de>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
This commit is contained in:
Sven Peter 2021-10-08 18:35:28 +02:00 committed by Wolfram Sang
parent 9bc5f4f660
commit 1a62668cef
1 changed files with 9 additions and 6 deletions
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15
drivers/i2c/busses/i2c-pasemi-core.c
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@ -61,6 +61,12 @@ static inline int reg_read(struct pasemi_smbus *smbus, int reg)
#define TXFIFO_WR(smbus, reg) reg_write((smbus), REG_MTXFIFO, (reg))
#define RXFIFO_RD(smbus) reg_read((smbus), REG_MRXFIFO)
static void pasemi_reset(struct pasemi_smbus *smbus)
{
reg_write(smbus, REG_CTL, (CTL_MTR | CTL_MRR |
(CLK_100K_DIV & CTL_CLK_M)));
}
static void pasemi_smb_clear(struct pasemi_smbus *smbus)
{
unsigned int status;
@ -135,8 +141,7 @@ static int pasemi_i2c_xfer_msg(struct i2c_adapter *adapter,
return 0;
reset_out:
reg_write(smbus, REG_CTL, (CTL_MTR | CTL_MRR |
(CLK_100K_DIV & CTL_CLK_M)));
pasemi_reset(smbus);
return err;
}
@ -302,8 +307,7 @@ static int pasemi_smb_xfer(struct i2c_adapter *adapter,
return 0;
reset_out:
reg_write(smbus, REG_CTL, (CTL_MTR | CTL_MRR |
(CLK_100K_DIV & CTL_CLK_M)));
pasemi_reset(smbus);
return err;
}
@ -335,8 +339,7 @@ int pasemi_i2c_common_probe(struct pasemi_smbus *smbus)
/* set up the sysfs linkage to our parent device */
smbus->adapter.dev.parent = smbus->dev;
reg_write(smbus, REG_CTL, (CTL_MTR | CTL_MRR |
(CLK_100K_DIV & CTL_CLK_M)));
pasemi_reset(smbus);
error = i2c_add_adapter(&smbus->adapter);
if (error)