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spi: amd: Use iopoll for busy waiting

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Instead of implementing a custom IO busy wait function, just use
readl_poll_timeout().

Signed-off-by: André Almeida <andrealmeid@collabora.com>
Link: https://lore.kernel.org/r/20220211143155.75513-2-andrealmeid@collabora.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
André Almeida 2022-02-11 11:31:53 -03:00 committed by Mark Brown
parent 2cbfa21286
commit 715bea3568
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GPG Key ID: 24D68B725D5487D0
1 changed files with 4 additions and 9 deletions
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13
drivers/spi/spi-amd.c
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@ -12,6 +12,7 @@
#include <linux/platform_device.h>
#include <linux/delay.h>
#include <linux/spi/spi.h>
#include <linux/iopoll.h>
#define AMD_SPI_CTRL0_REG 0x00
#define AMD_SPI_EXEC_CMD BIT(16)
@ -103,16 +104,10 @@ static inline void amd_spi_set_tx_count(struct amd_spi *amd_spi, u8 tx_count)
static int amd_spi_busy_wait(struct amd_spi *amd_spi)
{
int timeout = 100000;
u32 val;
/* poll for SPI bus to become idle */
while (amd_spi_readreg32(amd_spi, AMD_SPI_CTRL0_REG) & AMD_SPI_BUSY) {
usleep_range(10, 20);
if (timeout-- < 0)
return -ETIMEDOUT;
}
return 0;
return readl_poll_timeout(amd_spi->io_remap_addr + AMD_SPI_CTRL0_REG,
val, !(val & AMD_SPI_BUSY), 20, 2000000);
}
static int amd_spi_execute_opcode(struct amd_spi *amd_spi)