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authorWolfram Sang <wsa@kernel.org>2020-10-10 14:03:54 +0300
committerWolfram Sang <wsa@kernel.org>2020-10-10 14:03:54 +0300
commit5a02e7c429cb5e082e5d7be6e5b768828014ba70 (patch)
treefcb1218048a47cfaa44514ac1235431bdb1ff8f0 /drivers/i2c
parent1334d3b4e49e35d8912a7c37ffca4c5afb9a0516 (diff)
downloadlinux-5a02e7c429cb5e082e5d7be6e5b768828014ba70.tar.xz
Revert "i2c: imx: Fix reset of I2SR_IAL flag"
This reverts commit fa4d30556883f2eaab425b88ba9904865a4d00f3. An updated version was sent. So, revert this version and give the new version more time for testing. Signed-off-by: Wolfram Sang <wsa@kernel.org>
Diffstat (limited to 'drivers/i2c')
-rw-r--r--drivers/i2c/busses/i2c-imx.c20
1 files changed, 5 insertions, 15 deletions
diff --git a/drivers/i2c/busses/i2c-imx.c b/drivers/i2c/busses/i2c-imx.c
index cbdcab73a055..0ab5381aa012 100644
--- a/drivers/i2c/busses/i2c-imx.c
+++ b/drivers/i2c/busses/i2c-imx.c
@@ -412,19 +412,6 @@ static void i2c_imx_dma_free(struct imx_i2c_struct *i2c_imx)
dma->chan_using = NULL;
}
-static void i2c_imx_clear_irq(struct imx_i2c_struct *i2c_imx, unsigned int bits)
-{
- unsigned int temp;
-
- /*
- * i2sr_clr_opcode is the value to clear all interrupts. Here we want to
- * clear only <bits>, so we write ~i2sr_clr_opcode with just <bits>
- * toggled. This is required because i.MX needs W1C and Vybrid uses W0C.
- */
- temp = ~i2c_imx->hwdata->i2sr_clr_opcode ^ bits;
- imx_i2c_write_reg(temp, i2c_imx, IMX_I2C_I2SR);
-}
-
static int i2c_imx_bus_busy(struct imx_i2c_struct *i2c_imx, int for_busy, bool atomic)
{
unsigned long orig_jiffies = jiffies;
@@ -437,7 +424,8 @@ static int i2c_imx_bus_busy(struct imx_i2c_struct *i2c_imx, int for_busy, bool a
/* check for arbitration lost */
if (temp & I2SR_IAL) {
- i2c_imx_clear_irq(i2c_imx, I2SR_IAL);
+ temp &= ~I2SR_IAL;
+ imx_i2c_write_reg(temp, i2c_imx, IMX_I2C_I2SR);
return -EAGAIN;
}
@@ -635,7 +623,9 @@ static irqreturn_t i2c_imx_isr(int irq, void *dev_id)
if (temp & I2SR_IIF) {
/* save status register */
i2c_imx->i2csr = temp;
- i2c_imx_clear_irq(i2c_imx, I2SR_IIF);
+ temp &= ~I2SR_IIF;
+ temp |= (i2c_imx->hwdata->i2sr_clr_opcode & I2SR_IIF);
+ imx_i2c_write_reg(temp, i2c_imx, IMX_I2C_I2SR);
wake_up(&i2c_imx->queue);
return IRQ_HANDLED;
}