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spi: zynq_qspi: Add a check for baudrate and set default if not in limits

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Add a check afer baudrate calculation to see if the resultant value
falls within the range, else set it to default baudrate value.

Signed-off-by: Siva Durga Prasad Paladugu <siva.durga.paladugu@xilinx.com>
Signed-off-by: Ashok Reddy Soma <ashok.reddy.soma@xilinx.com>
Link: https://lore.kernel.org/r/20220131052240.23403-4-ashok.reddy.soma@xilinx.com
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
This commit is contained in:
Siva Durga Prasad Paladugu 2022-01-30 22:22:39 -07:00 committed by Michal Simek
parent a5a387a421
commit 30671860d7
1 changed files with 6 additions and 0 deletions
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6
drivers/spi/zynq_qspi.c
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@ -49,6 +49,9 @@ DECLARE_GLOBAL_DATA_PTR;
#define ZYNQ_QSPI_CR_BAUD_SHIFT 3 /* Baud rate divisor shift */
#define ZYNQ_QSPI_CR_SS_SHIFT 10 /* Slave select shift */
#define ZYNQ_QSPI_MAX_BAUD_RATE 0x7
#define ZYNQ_QSPI_DEFAULT_BAUD_RATE 0x2
#define ZYNQ_QSPI_FIFO_DEPTH 63
#define ZYNQ_QSPI_WAIT (CONFIG_SYS_HZ / 100) /* 10 ms */
@ -621,6 +624,9 @@ static int zynq_qspi_set_speed(struct udevice *bus, uint speed)
(2 << baud_rate_val)) > speed))
baud_rate_val++;
if (baud_rate_val > ZYNQ_QSPI_MAX_BAUD_RATE)
baud_rate_val = ZYNQ_QSPI_DEFAULT_BAUD_RATE;
plat->speed_hz = speed / (2 << baud_rate_val);
}
confr &= ~ZYNQ_QSPI_CR_BAUD_MASK;