diff options
| author | Vignesh R <vigneshr@ti.com> | 2016-07-25 10:15:45 (GMT) |
|---|---|---|
| committer | Jagan Teki <jteki@openedev.com> | 2016-07-29 18:45:00 (GMT) |
| commit | a6f56ad1eee1fe7ae1a46e022427a001eda4ce16 (patch) | |
| tree | 05e5d78fc162d9f41e880b3dfa868ad4589b876c /drivers | |
| parent | 4d790788ce009909842290e85d3e57db36935ad4 (diff) | |
| download | u-boot-a6f56ad1eee1fe7ae1a46e022427a001eda4ce16.tar.xz | |
spi: ti_qspi: dra7xx: Add support to use 76.8MHz clock
According to AM572x DM SPRS953A, QSPI bus speed can be 76.8MHz, update
the driver to use the same.
Signed-off-by: Vignesh R <vigneshr@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Jagan Teki <jteki@openedev.com>
Reviewed-by: Mugunthan V N <mugunthanvnm@ti.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/spi/ti_qspi.c | 17 |
1 files changed, 12 insertions, 5 deletions
diff --git a/drivers/spi/ti_qspi.c b/drivers/spi/ti_qspi.c index fa7ee22..bb72cb0 100644 --- a/drivers/spi/ti_qspi.c +++ b/drivers/spi/ti_qspi.c @@ -21,7 +21,8 @@ DECLARE_GLOBAL_DATA_PTR; /* ti qpsi register bit masks */ #define QSPI_TIMEOUT 2000000 -#define QSPI_FCLK 192000000 +#define QSPI_FCLK 192000000 +#define QSPI_DRA7XX_FCLK 76800000 /* clock control */ #define QSPI_CLK_EN BIT(31) #define QSPI_CLK_DIV_MAX 0xffff @@ -101,6 +102,7 @@ struct ti_qspi_priv { #endif struct ti_qspi_regs *base; void *ctrl_mod_mmap; + ulong fclk; unsigned int mode; u32 cmd; u32 dc; @@ -113,7 +115,7 @@ static void ti_spi_set_speed(struct ti_qspi_priv *priv, uint hz) if (!hz) clk_div = 0; else - clk_div = (QSPI_FCLK / hz) - 1; + clk_div = (priv->fclk / hz) - 1; debug("ti_spi_set_speed: hz: %d, clock divider %d\n", hz, clk_div); @@ -366,8 +368,10 @@ struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs, #if defined(CONFIG_DRA7XX) || defined(CONFIG_AM57XX) priv->ctrl_mod_mmap = (void *)CORE_CTRL_IO; priv->slave.memory_map = (void *)MMAP_START_ADDR_DRA; + priv->fclk = QSPI_DRA7XX_FCLK; #else priv->slave.memory_map = (void *)MMAP_START_ADDR_AM43x; + priv->fclk = QSPI_FCLK; #endif ti_spi_set_speed(priv, max_hz); @@ -520,7 +524,10 @@ static int ti_qspi_xfer(struct udevice *dev, unsigned int bitlen, static int ti_qspi_probe(struct udevice *bus) { - /* Nothing to do in probe */ + struct ti_qspi_priv *priv = dev_get_priv(bus); + + priv->fclk = dev_get_driver_data(bus); + return 0; } @@ -572,8 +579,8 @@ static const struct dm_spi_ops ti_qspi_ops = { }; static const struct udevice_id ti_qspi_ids[] = { - { .compatible = "ti,dra7xxx-qspi" }, - { .compatible = "ti,am4372-qspi" }, + { .compatible = "ti,dra7xxx-qspi", .data = QSPI_DRA7XX_FCLK}, + { .compatible = "ti,am4372-qspi", .data = QSPI_FCLK}, { } }; |