[PATCH 1/4] spi: zynq_qspi: Add child pre probe function

[Ashok Reddy Soma]

From: Siva Durga Prasad Paladugu <siva.durga.paladugu at xilinx.com>

Add child pre probe function in the driver. Update max_hz of priv from
spi_slave structure.

Signed-off-by: Siva Durga Prasad Paladugu <siva.durga.paladugu at xilinx.com>
Signed-off-by: Ashok Reddy Soma <ashok.reddy.soma at xilinx.com>
---

 drivers/spi/zynq_qspi.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/spi/zynq_qspi.c b/drivers/spi/zynq_qspi.c
index b69d992b28..066a0c6002 100644
--- a/drivers/spi/zynq_qspi.c
+++ b/drivers/spi/zynq_qspi.c
@@ -94,6 +94,7 @@ struct zynq_qspi_priv {
 	u8 mode;
 	u8 fifo_depth;
 	u32 freq;		/* required frequency */
+	u32 max_hz;
 	const void *tx_buf;
 	void *rx_buf;
 	unsigned len;
@@ -174,6 +175,16 @@ static void zynq_qspi_init_hw(struct zynq_qspi_priv *priv)
 	writel(ZYNQ_QSPI_ENR_SPI_EN_MASK, &regs->enr);
 }
 
+static int zynq_qspi_child_pre_probe(struct udevice *bus)
+{
+	struct spi_slave *slave = dev_get_parent_priv(bus);
+	struct zynq_qspi_priv *priv = dev_get_priv(bus->parent);
+
+	priv->max_hz = slave->max_hz;
+
+	return 0;
+}
+
 static int zynq_qspi_probe(struct udevice *bus)
 {
 	struct zynq_qspi_plat *plat = dev_get_plat(bus);
@@ -746,4 +757,5 @@ U_BOOT_DRIVER(zynq_qspi) = {
 	.plat_auto	= sizeof(struct zynq_qspi_plat),
 	.priv_auto	= sizeof(struct zynq_qspi_priv),
 	.probe  = zynq_qspi_probe,
+	.child_pre_probe = zynq_qspi_child_pre_probe,
 };
-- 
2.17.1