diff options
author | Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> | 2022-05-20 23:29:18 +0300 |
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committer | Wolfram Sang <wsa@kernel.org> | 2022-05-21 13:55:32 +0300 |
commit | e35fb4188942a7338588536cf9e9756c34c103fb (patch) | |
tree | 3b1fcbaf599cb902dd0f3fd8c6810f32a0e4c7f5 /drivers/i2c | |
parent | f0f0e07685609c84ef5e0a3b1725bb666c95fbc4 (diff) | |
download | linux-e35fb4188942a7338588536cf9e9756c34c103fb.tar.xz |
i2c: rcar: use flags instead of atomic_xfer
i2c-rcar already has priv->flags. This patch adds a new persistent flag
ID_P_NOT_ATOMIC and uses it to save the extra variable. The negation of
the logic was done to make the code more readable.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
[wsa: negated the logic, rebased, updated the commit message]
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
Diffstat (limited to 'drivers/i2c')
-rw-r--r-- | drivers/i2c/busses/i2c-rcar.c | 20 |
1 files changed, 10 insertions, 10 deletions
diff --git a/drivers/i2c/busses/i2c-rcar.c b/drivers/i2c/busses/i2c-rcar.c index 034d1ec64cf0..6e7be9d9f504 100644 --- a/drivers/i2c/busses/i2c-rcar.c +++ b/drivers/i2c/busses/i2c-rcar.c @@ -104,10 +104,11 @@ #define ID_NACK BIT(4) #define ID_EPROTO BIT(5) /* persistent flags */ +#define ID_P_NOT_ATOMIC BIT(28) #define ID_P_HOST_NOTIFY BIT(29) #define ID_P_NO_RXDMA BIT(30) /* HW forbids RXDMA sometimes */ #define ID_P_PM_BLOCKED BIT(31) -#define ID_P_MASK GENMASK(31, 29) +#define ID_P_MASK GENMASK(31, 28) enum rcar_i2c_type { I2C_RCAR_GEN1, @@ -138,7 +139,6 @@ struct rcar_i2c_priv { enum dma_data_direction dma_direction; struct reset_control *rstc; - bool atomic_xfer; int irq; struct i2c_client *host_notify_client; @@ -350,7 +350,7 @@ static void rcar_i2c_prepare_msg(struct rcar_i2c_priv *priv) priv->flags |= ID_LAST_MSG; rcar_i2c_write(priv, ICMAR, i2c_8bit_addr_from_msg(priv->msg)); - if (!priv->atomic_xfer) + if (priv->flags & ID_P_NOT_ATOMIC) rcar_i2c_write(priv, ICMIER, read ? RCAR_IRQ_RECV : RCAR_IRQ_SEND); if (rep_start) @@ -420,7 +420,7 @@ static bool rcar_i2c_dma(struct rcar_i2c_priv *priv) int len; /* Do various checks to see if DMA is feasible at all */ - if (priv->atomic_xfer || IS_ERR(chan) || msg->len < RCAR_MIN_DMA_LEN || + if (!(priv->flags & ID_P_NOT_ATOMIC) || IS_ERR(chan) || msg->len < RCAR_MIN_DMA_LEN || !(msg->flags & I2C_M_DMA_SAFE) || (read && priv->flags & ID_P_NO_RXDMA)) return false; @@ -670,7 +670,7 @@ static irqreturn_t rcar_i2c_irq(int irq, struct rcar_i2c_priv *priv, u32 msr) /* Nack */ if (msr & MNR) { /* HW automatically sends STOP after received NACK */ - if (!priv->atomic_xfer) + if (priv->flags & ID_P_NOT_ATOMIC) rcar_i2c_write(priv, ICMIER, RCAR_IRQ_STOP); priv->flags |= ID_NACK; goto out; @@ -692,7 +692,7 @@ out: if (priv->flags & ID_DONE) { rcar_i2c_write(priv, ICMIER, 0); rcar_i2c_write(priv, ICMSR, 0); - if (!priv->atomic_xfer) + if (priv->flags & ID_P_NOT_ATOMIC) wake_up(&priv->wait); } @@ -710,7 +710,7 @@ static irqreturn_t rcar_i2c_gen2_irq(int irq, void *ptr) /* Only handle interrupts that are currently enabled */ msr = rcar_i2c_read(priv, ICMSR); - if (!priv->atomic_xfer) + if (priv->flags & ID_P_NOT_ATOMIC) msr &= rcar_i2c_read(priv, ICMIER); return rcar_i2c_irq(irq, priv, msr); @@ -723,7 +723,7 @@ static irqreturn_t rcar_i2c_gen3_irq(int irq, void *ptr) /* Only handle interrupts that are currently enabled */ msr = rcar_i2c_read(priv, ICMSR); - if (!priv->atomic_xfer) + if (priv->flags & ID_P_NOT_ATOMIC) msr &= rcar_i2c_read(priv, ICMIER); /* @@ -832,7 +832,7 @@ static int rcar_i2c_master_xfer(struct i2c_adapter *adap, int i, ret; long time_left; - priv->atomic_xfer = false; + priv->flags |= ID_P_NOT_ATOMIC; pm_runtime_get_sync(dev); @@ -896,7 +896,7 @@ static int rcar_i2c_master_xfer_atomic(struct i2c_adapter *adap, bool time_left; int ret; - priv->atomic_xfer = true; + priv->flags &= ~ID_P_NOT_ATOMIC; pm_runtime_get_sync(dev); |