From 2a75bc1303b34e88745fcecfeacbe94f2a4bd1e2 Mon Sep 17 00:00:00 2001 From: Ashok Reddy Soma Date: Fri, 15 Jul 2022 19:31:19 +0530 Subject: [PATCH] spi: zynq_qspi: Fix programming qspi speed When programming qspi flash speed we need to check the requested flash speed not to exceed the spi max frequency. In the current implementation we are checking qspi ref clk instead. This commit fixes the issue by checking the requested speed and programs the specified max frequency. Signed-off-by: Ashok Reddy Soma Link: https://lore.kernel.org/r/1657893679-20039-5-git-send-email-ashok.reddy.soma@xilinx.com Signed-off-by: Michal Simek --- drivers/spi/zynq_qspi.c | 9 +++------ 1 file changed, 3 insertions(+), 6 deletions(-) diff --git a/drivers/spi/zynq_qspi.c b/drivers/spi/zynq_qspi.c index 52db7b3f21..00e3ffcd1d 100644 --- a/drivers/spi/zynq_qspi.c +++ b/drivers/spi/zynq_qspi.c @@ -622,15 +622,12 @@ static int zynq_qspi_set_speed(struct udevice *bus, uint speed) uint32_t confr; u8 baud_rate_val = 0; - if (speed > plat->frequency) - speed = plat->frequency; + if (!speed || speed > priv->max_hz) + speed = priv->max_hz; /* Set the clock frequency */ confr = readl(®s->cr); - if (speed == 0) { - /* Set baudrate x8, if the freq is 0 */ - baud_rate_val = 0x2; - } else if (plat->speed_hz != speed) { + if (plat->speed_hz != speed) { while ((baud_rate_val < ZYNQ_QSPI_CR_BAUD_MAX) && ((plat->frequency / (2 << baud_rate_val)) > speed)) -- 2.39.5