diff options
| author | Russell King <rmk+kernel@armlinux.org.uk> | 2020-04-27 19:49:01 +0100 |
|---|---|---|
| committer | Wolfram Sang <wsa@kernel.org> | 2020-05-05 14:50:27 +0200 |
| commit | f8e5d3cb31cbebce6955dda462710b4c6f6d1c5a (patch) | |
| tree | dd1839a7db98887ad919d1002b33a252c843c4e1 /drivers/i2c/busses/i2c-pxa.c | |
| parent | 940695aa36f18f8cd5fc703db601b4cd2662a055 (diff) | |
i2c: pxa: add and use definitions for IBMR register
Add definitions for the bits in the IBMR register, and use them in the
code. This improves readability.
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
Diffstat (limited to 'drivers/i2c/busses/i2c-pxa.c')
| -rw-r--r-- | drivers/i2c/busses/i2c-pxa.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/drivers/i2c/busses/i2c-pxa.c b/drivers/i2c/busses/i2c-pxa.c index e018cee8f559..6af6c7245646 100644 --- a/drivers/i2c/busses/i2c-pxa.c +++ b/drivers/i2c/busses/i2c-pxa.c @@ -33,6 +33,9 @@ #include <linux/slab.h> /* I2C register field definitions */ +#define IBMR_SDAS (1 << 0) +#define IBMR_SCLS (1 << 1) + #define ICR_START (1 << 0) /* start bit */ #define ICR_STOP (1 << 1) /* stop bit */ #define ICR_ACKNAK (1 << 2) /* send ACK(0) or NAK(1) */ @@ -334,7 +337,7 @@ static void i2c_pxa_abort(struct pxa_i2c *i2c) return; } - while ((i > 0) && (readl(_IBMR(i2c)) & 0x1) == 0) { + while ((i > 0) && (readl(_IBMR(i2c)) & IBMR_SDAS) == 0) { unsigned long icr = readl(_ICR(i2c)); icr &= ~ICR_START; @@ -389,7 +392,8 @@ static int i2c_pxa_wait_master(struct pxa_i2c *i2c) * quick check of the i2c lines themselves to ensure they've * gone high... */ - if ((readl(_ISR(i2c)) & (ISR_UB | ISR_IBB)) == 0 && readl(_IBMR(i2c)) == 3) { + if ((readl(_ISR(i2c)) & (ISR_UB | ISR_IBB)) == 0 && + readl(_IBMR(i2c)) == (IBMR_SCLS | IBMR_SDAS)) { if (i2c_debug > 0) dev_dbg(&i2c->adap.dev, "%s: done\n", __func__); return 1; @@ -584,7 +588,7 @@ static void i2c_pxa_slave_start(struct pxa_i2c *i2c, u32 isr) timeout = 0x10000; while (1) { - if ((readl(_IBMR(i2c)) & 2) == 2) + if ((readl(_IBMR(i2c)) & IBMR_SCLS) == IBMR_SCLS) break; timeout--; @@ -679,7 +683,7 @@ static void i2c_pxa_slave_start(struct pxa_i2c *i2c, u32 isr) timeout = 0x10000; while (1) { - if ((readl(_IBMR(i2c)) & 2) == 2) + if ((readl(_IBMR(i2c)) & IBMR_SCLS) == IBMR_SCLS) break; timeout--; |