diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/spi/tegra210_qspi.c | 24 |
1 files changed, 15 insertions, 9 deletions
diff --git a/drivers/spi/tegra210_qspi.c b/drivers/spi/tegra210_qspi.c index 2a77126..d914337 100644 --- a/drivers/spi/tegra210_qspi.c +++ b/drivers/spi/tegra210_qspi.c @@ -42,10 +42,10 @@ DECLARE_GLOBAL_DATA_PTR; #define QSPI_CMD1_BITLEN_SHIFT 0 /* COMMAND2 */ -#define QSPI_CMD2_TX_CLK_TAP_DELAY BIT(6) -#define QSPI_CMD2_TX_CLK_TAP_DELAY_MASK GENMASK(11,6) -#define QSPI_CMD2_RX_CLK_TAP_DELAY BIT(0) -#define QSPI_CMD2_RX_CLK_TAP_DELAY_MASK GENMASK(5,0) +#define QSPI_CMD2_TX_CLK_TAP_DELAY_SHIFT 10 +#define QSPI_CMD2_TX_CLK_TAP_DELAY_MASK GENMASK(14,10) +#define QSPI_CMD2_RX_CLK_TAP_DELAY_SHIFT 0 +#define QSPI_CMD2_RX_CLK_TAP_DELAY_MASK GENMASK(7,0) /* TRANSFER STATUS */ #define QSPI_XFER_STS_RDY BIT(30) @@ -111,9 +111,9 @@ static int tegra210_qspi_ofdata_to_platdata(struct udevice *bus) /* Use 500KHz as a suitable default */ plat->frequency = fdtdec_get_int(blob, node, "spi-max-frequency", - 500000); + 500000); plat->deactivate_delay_us = fdtdec_get_int(blob, node, - "spi-deactivate-delay", 0); + "spi-deactivate-delay", 0); debug("%s: base=%#08lx, periph_id=%d, max-frequency=%d, deactivate_delay=%d\n", __func__, plat->base, plat->periph_id, plat->frequency, plat->deactivate_delay_us); @@ -127,14 +127,23 @@ static int tegra210_qspi_probe(struct udevice *bus) struct tegra210_qspi_priv *priv = dev_get_priv(bus); priv->regs = (struct qspi_regs *)plat->base; + struct qspi_regs *regs = priv->regs; priv->last_transaction_us = timer_get_us(); priv->freq = plat->frequency; priv->periph_id = plat->periph_id; + debug("%s: Freq = %u, id = %d\n", __func__, priv->freq, + priv->periph_id); /* Change SPI clock to correct frequency, PLLP_OUT0 source */ clock_start_periph_pll(priv->periph_id, CLOCK_ID_PERIPH, priv->freq); + /* Set tap delays here, clock change above resets QSPI controller */ + u32 reg = (0x09 << QSPI_CMD2_TX_CLK_TAP_DELAY_SHIFT) | + (0x0C << QSPI_CMD2_RX_CLK_TAP_DELAY_SHIFT); + writel(reg, ®s->command2); + debug("%s: COMMAND2 = %08x\n", __func__, readl(®s->command2)); + return 0; } @@ -144,9 +153,6 @@ static int tegra210_qspi_claim_bus(struct udevice *dev) struct tegra210_qspi_priv *priv = dev_get_priv(bus); struct qspi_regs *regs = priv->regs; - /* Change SPI clock to correct frequency, PLLP_OUT0 source */ - clock_start_periph_pll(priv->periph_id, CLOCK_ID_PERIPH, priv->freq); - debug("%s: FIFO STATUS = %08x\n", __func__, readl(®s->fifo_status)); /* Set master mode and sw controlled CS */ |