diff options
| author | Adamski, Krzysztof (Nokia - PL/Wroclaw) <krzysztof.adamski@nokia.com> | 2018-12-10 15:00:52 +0000 |
|---|---|---|
| committer | Wolfram Sang <wsa@the-dreams.de> | 2018-12-11 20:58:59 +0100 |
| commit | eb9907789ac373fc122c4b3a3c2d3f061d9ee922 (patch) | |
| tree | 361af36ab47126b59ecbaa974bd555ed527074fd /drivers/i2c/busses/i2c-axxia.c | |
| parent | 66693960f574aa830986e1603657af36423b24eb (diff) | |
| download | lwn-eb9907789ac373fc122c4b3a3c2d3f061d9ee922.tar.gz lwn-eb9907789ac373fc122c4b3a3c2d3f061d9ee922.zip | |
i2c-axxia: dedicated function to set client addr
This patch moves configuration of hardware registers used for setting
i2c client address to separate function. It is preparatory change for
next commit.
Signed-off-by: Krzysztof Adamski <krzysztof.adamski@nokia.com>
Reviewed-by: Alexander Sverdlin <alexander.sverdlin@nokia.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Diffstat (limited to 'drivers/i2c/busses/i2c-axxia.c')
| -rw-r--r-- | drivers/i2c/busses/i2c-axxia.c | 29 |
1 files changed, 18 insertions, 11 deletions
diff --git a/drivers/i2c/busses/i2c-axxia.c b/drivers/i2c/busses/i2c-axxia.c index 51d34959709b..d37caf694fbf 100644 --- a/drivers/i2c/busses/i2c-axxia.c +++ b/drivers/i2c/busses/i2c-axxia.c @@ -337,17 +337,9 @@ out: return IRQ_HANDLED; } -static int axxia_i2c_xfer_msg(struct axxia_i2c_dev *idev, struct i2c_msg *msg) +static void axxia_i2c_set_addr(struct axxia_i2c_dev *idev, struct i2c_msg *msg) { - u32 int_mask = MST_STATUS_ERR | MST_STATUS_SNS; - u32 rx_xfer, tx_xfer; u32 addr_1, addr_2; - unsigned long time_left; - unsigned int wt_value; - - idev->msg = msg; - idev->msg_xfrd = 0; - reinit_completion(&idev->msg_complete); if (i2c_m_ten(msg)) { /* 10-bit address @@ -367,6 +359,23 @@ static int axxia_i2c_xfer_msg(struct axxia_i2c_dev *idev, struct i2c_msg *msg) addr_2 = 0; } + writel(addr_1, idev->base + MST_ADDR_1); + writel(addr_2, idev->base + MST_ADDR_2); +} + +static int axxia_i2c_xfer_msg(struct axxia_i2c_dev *idev, struct i2c_msg *msg) +{ + u32 int_mask = MST_STATUS_ERR | MST_STATUS_SNS; + u32 rx_xfer, tx_xfer; + unsigned long time_left; + unsigned int wt_value; + + idev->msg = msg; + idev->msg_xfrd = 0; + reinit_completion(&idev->msg_complete); + + axxia_i2c_set_addr(idev, msg); + if (i2c_m_rd(msg)) { /* I2C read transfer */ rx_xfer = i2c_m_recv_len(msg) ? I2C_SMBUS_BLOCK_MAX : msg->len; @@ -379,8 +388,6 @@ static int axxia_i2c_xfer_msg(struct axxia_i2c_dev *idev, struct i2c_msg *msg) writel(rx_xfer, idev->base + MST_RX_XFER); writel(tx_xfer, idev->base + MST_TX_XFER); - writel(addr_1, idev->base + MST_ADDR_1); - writel(addr_2, idev->base + MST_ADDR_2); if (i2c_m_rd(msg)) int_mask |= MST_STATUS_RFL; |