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spi: zynqmp_gqspi: Fix tap delay values

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There is no need of read modify write for tapdelay settings
ans hence remove the read operations while setting tapdelays.
Also, correct tapdelay value settings at 40MHZ by modifying
the if check to <= instead of <.

Signed-off-by: Siva Durga Prasad Paladugu <siva.durga.paladugu@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
This commit is contained in:
Siva Durga Prasad Paladugu
2019-03-21 12:10:17 +05:30
committed by Michal Simek
parent 3aa57bd9e2
commit cebc700b71
1 changed files with 6 additions and 11 deletions
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17
drivers/spi/zynqmp_gqspi.c
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@@ -348,23 +348,18 @@ void zynqmp_qspi_set_tapdelay(struct udevice *bus, u32 baudrateval)
debug("%s, req_hz:%d, clk_rate:%d, baudrateval:%d\n",
__func__, reqhz, clk_rate, baudrateval);
if (reqhz < GQSPI_FREQ_40MHZ) {
zynqmp_mmio_read(IOU_TAPDLY_BYPASS_OFST, &tapdlybypass);
tapdlybypass |= (TAP_DLY_BYPASS_LQSPI_RX_VALUE <<
if (reqhz <= GQSPI_FREQ_40MHZ) {
tapdlybypass = (TAP_DLY_BYPASS_LQSPI_RX_VALUE <<
TAP_DLY_BYPASS_LQSPI_RX_SHIFT);
} else if (reqhz <= GQSPI_FREQ_100MHZ) {
zynqmp_mmio_read(IOU_TAPDLY_BYPASS_OFST, &tapdlybypass);
tapdlybypass |= (TAP_DLY_BYPASS_LQSPI_RX_VALUE <<
tapdlybypass = (TAP_DLY_BYPASS_LQSPI_RX_VALUE <<
TAP_DLY_BYPASS_LQSPI_RX_SHIFT);
lpbkdlyadj = readl(&regs->lpbkdly);
lpbkdlyadj |= (GQSPI_LPBK_DLY_ADJ_LPBK_MASK);
datadlyadj = readl(&regs->gqspidlyadj);
datadlyadj |= ((GQSPI_USE_DATA_DLY << GQSPI_USE_DATA_DLY_SHIFT)
lpbkdlyadj = (GQSPI_LPBK_DLY_ADJ_LPBK_MASK);
datadlyadj = ((GQSPI_USE_DATA_DLY << GQSPI_USE_DATA_DLY_SHIFT)
| (GQSPI_DATA_DLY_ADJ_VALUE <<
GQSPI_DATA_DLY_ADJ_SHIFT));
} else if (reqhz <= GQSPI_FREQ_150MHZ) {
lpbkdlyadj = readl(&regs->lpbkdly);
lpbkdlyadj |= ((GQSPI_LPBK_DLY_ADJ_LPBK_MASK) |
lpbkdlyadj = ((GQSPI_LPBK_DLY_ADJ_LPBK_MASK) |
GQSPI_LPBK_DLY_ADJ_DLY_0);
}