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rockchip: spi: Add support for of-platdata

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Allow this driver to be used with of-platdata on rk3288.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2016-11-13 14:22:02 -07:00
parent 71634f289d
commit 6e019c4f28
1 changed files with 35 additions and 1 deletions
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36
drivers/spi/rk_spi.c
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@ -12,6 +12,7 @@
#include <common.h>
#include <clk.h>
#include <dm.h>
#include <dt-structs.h>
#include <errno.h>
#include <spi.h>
#include <linux/errno.h>
@ -27,6 +28,9 @@ DECLARE_GLOBAL_DATA_PTR;
#define DEBUG_RK_SPI 0
struct rockchip_spi_platdata {
#if CONFIG_IS_ENABLED(OF_PLATDATA)
struct dtd_rockchip_rk3288_spi of_plat;
#endif
s32 frequency; /* Default clock frequency, -1 for none */
fdt_addr_t base;
uint deactivate_delay_us; /* Delay to wait after deactivate */
@ -127,9 +131,29 @@ static void spi_cs_deactivate(struct udevice *dev, uint cs)
priv->last_transaction_us = timer_get_us();
}
#if CONFIG_IS_ENABLED(OF_PLATDATA)
static int conv_of_platdata(struct udevice *dev)
{
struct rockchip_spi_platdata *plat = dev->platdata;
struct dtd_rockchip_rk3288_spi *dtplat = &plat->of_plat;
struct rockchip_spi_priv *priv = dev_get_priv(dev);
int ret;
plat->base = dtplat->reg[0];
plat->frequency = 20000000;
ret = clk_get_by_index_platdata(dev, 0, dtplat->clocks, &priv->clk);
if (ret < 0)
return ret;
dev->req_seq = 0;
return 0;
}
#endif
static int rockchip_spi_ofdata_to_platdata(struct udevice *bus)
{
struct rockchip_spi_platdata *plat = bus->platdata;
#if !CONFIG_IS_ENABLED(OF_PLATDATA)
struct rockchip_spi_platdata *plat = dev_get_platdata(bus);
struct rockchip_spi_priv *priv = dev_get_priv(bus);
const void *blob = gd->fdt_blob;
int node = bus->of_offset;
@ -153,6 +177,7 @@ static int rockchip_spi_ofdata_to_platdata(struct udevice *bus)
debug("%s: base=%x, max-frequency=%d, deactivate_delay=%d\n",
__func__, (uint)plat->base, plat->frequency,
plat->deactivate_delay_us);
#endif
return 0;
}
@ -164,6 +189,11 @@ static int rockchip_spi_probe(struct udevice *bus)
int ret;
debug("%s: probe\n", __func__);
#if CONFIG_IS_ENABLED(OF_PLATDATA)
ret = conv_of_platdata(bus);
if (ret)
return ret;
#endif
priv->regs = (struct rockchip_spi *)plat->base;
priv->last_transaction_us = timer_get_us();
@ -369,7 +399,11 @@ static const struct udevice_id rockchip_spi_ids[] = {
};
U_BOOT_DRIVER(rockchip_spi) = {
#if CONFIG_IS_ENABLED(OF_PLATDATA)
.name = "rockchip_rk3288_spi",
#else
.name = "rockchip_spi",
#endif
.id = UCLASS_SPI,
.of_match = rockchip_spi_ids,
.ops = &rockchip_spi_ops,