Merge https://gitlab.denx.de/u-boot/custodians/u-boot-mpc85xx

[oweals/u-boot.git] / drivers / spi / mxc_spi.c

diff --git a/drivers/spi/mxc_spi.c b/drivers/spi/mxc_spi.c
index 41f0cfcd6b7a6db5324be39f26b494c7548d1c48..f52ebf4d67c47d3cd83b5b902676f6e110fb496f 100644 (file)
--- a/drivers/spi/mxc_spi.c
+++ b/drivers/spi/mxc_spi.c
@@ -1,13 +1,16 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright (C) 2008, Guennadi Liakhovetski <lg@denx.de>
- *
- * SPDX-License-Identifier:    GPL-2.0+
  */
 
 #include <common.h>
 #include <dm.h>
+#include <log.h>
 #include <malloc.h>
 #include <spi.h>
+#include <dm/device_compat.h>
+#include <linux/bitops.h>
+#include <linux/delay.h>
 #include <linux/errno.h>
 #include <asm/io.h>
 #include <asm/gpio.h>
@@ -39,6 +42,8 @@ __weak int board_spi_cs_gpio(unsigned bus, unsigned cs)
 #define CONFIG_SYS_SPI_MXC_WAIT                (CONFIG_SYS_HZ/100)     /* 10 ms */
 #endif
 
+#define MAX_CS_COUNT   4
+
 struct mxc_spi_slave {
        struct spi_slave slave;
        unsigned long   base;
@@ -51,6 +56,8 @@ struct mxc_spi_slave {
        unsigned int    max_hz;
        unsigned int    mode;
        struct gpio_desc ss;
+       struct gpio_desc cs_gpios[MAX_CS_COUNT];
+       struct udevice *dev;
 };
 
 static inline struct mxc_spi_slave *to_mxc_spi_slave(struct spi_slave *slave)
@@ -60,22 +67,38 @@ static inline struct mxc_spi_slave *to_mxc_spi_slave(struct spi_slave *slave)
 
 static void mxc_spi_cs_activate(struct mxc_spi_slave *mxcs)
 {
-       if (CONFIG_IS_ENABLED(DM_SPI)) {
-               dm_gpio_set_value(&mxcs->ss, mxcs->ss_pol);
-       } else {
-               if (mxcs->gpio > 0)
-                       gpio_set_value(mxcs->gpio, mxcs->ss_pol);
-       }
+#if defined(CONFIG_DM_SPI)
+       struct udevice *dev = mxcs->dev;
+       struct dm_spi_slave_platdata *slave_plat = dev_get_parent_platdata(dev);
+
+       u32 cs = slave_plat->cs;
+
+       if (!dm_gpio_is_valid(&mxcs->cs_gpios[cs]))
+               return;
+
+       dm_gpio_set_value(&mxcs->cs_gpios[cs], 1);
+#else
+       if (mxcs->gpio > 0)
+               gpio_set_value(mxcs->gpio, mxcs->ss_pol);
+#endif
 }
 
 static void mxc_spi_cs_deactivate(struct mxc_spi_slave *mxcs)
 {
-       if (CONFIG_IS_ENABLED(DM_SPI)) {
-               dm_gpio_set_value(&mxcs->ss, !(mxcs->ss_pol));
-       } else {
-               if (mxcs->gpio > 0)
-                       gpio_set_value(mxcs->gpio, !(mxcs->ss_pol));
-       }
+#if defined(CONFIG_DM_SPI)
+       struct udevice *dev = mxcs->dev;
+       struct dm_spi_slave_platdata *slave_plat = dev_get_parent_platdata(dev);
+
+       u32 cs = slave_plat->cs;
+
+       if (!dm_gpio_is_valid(&mxcs->cs_gpios[cs]))
+               return;
+
+       dm_gpio_set_value(&mxcs->cs_gpios[cs], 0);
+#else
+       if (mxcs->gpio > 0)
+               gpio_set_value(mxcs->gpio, !(mxcs->ss_pol));
+#endif
 }
 
 u32 get_cspi_div(u32 div)
@@ -225,8 +248,8 @@ int spi_xchg_single(struct mxc_spi_slave *mxcs, unsigned int bitlen,
        u32 ts;
        int status;
 
-       debug("%s: bitlen %d dout 0x%x din 0x%x\n",
-               __func__, bitlen, (u32)dout, (u32)din);
+       debug("%s: bitlen %d dout 0x%lx din 0x%lx\n",
+               __func__, bitlen, (ulong)dout, (ulong)din);
 
        mxcs->ctrl_reg = (mxcs->ctrl_reg &
                ~MXC_CSPICTRL_BITCOUNT(MXC_CSPICTRL_MAXBITS)) |
@@ -401,10 +424,6 @@ int spi_xfer(struct spi_slave *slave, unsigned int bitlen, const void *dout,
        return mxc_spi_xfer_internal(mxcs, bitlen, dout, din, flags);
 }
 
-void spi_init(void)
-{
-}
-
 /*
  * Some SPI devices require active chip-select over multiple
  * transactions, we achieve this using a GPIO. Still, the SPI
@@ -493,28 +512,35 @@ void spi_release_bus(struct spi_slave *slave)
 
 static int mxc_spi_probe(struct udevice *bus)
 {
-       struct mxc_spi_slave *plat = bus->platdata;
        struct mxc_spi_slave *mxcs = dev_get_platdata(bus);
        int node = dev_of_offset(bus);
        const void *blob = gd->fdt_blob;
        int ret;
+       int i;
 
-       if (gpio_request_by_name(bus, "cs-gpios", 0, &plat->ss,
-                                GPIOD_IS_OUT)) {
-               dev_err(bus, "No cs-gpios property\n");
-               return -EINVAL;
+       ret = gpio_request_list_by_name(bus, "cs-gpios", mxcs->cs_gpios,
+                                       ARRAY_SIZE(mxcs->cs_gpios), 0);
+       if (ret < 0) {
+               pr_err("Can't get %s gpios! Error: %d", bus->name, ret);
+               return ret;
        }
 
-       plat->base = dev_get_addr(bus);
-       if (plat->base == FDT_ADDR_T_NONE)
-               return -ENODEV;
+       for (i = 0; i < ARRAY_SIZE(mxcs->cs_gpios); i++) {
+               if (!dm_gpio_is_valid(&mxcs->cs_gpios[i]))
+                       continue;
 
-       ret = dm_gpio_set_value(&plat->ss, !(mxcs->ss_pol));
-       if (ret) {
-               dev_err(bus, "Setting cs error\n");
-               return ret;
+               ret = dm_gpio_set_dir_flags(&mxcs->cs_gpios[i],
+                                           GPIOD_IS_OUT | GPIOD_ACTIVE_LOW);
+               if (ret) {
+                       dev_err(bus, "Setting cs %d error\n", i);
+                       return ret;
+               }
        }
 
+       mxcs->base = devfdt_get_addr(bus);
+       if (mxcs->base == FDT_ADDR_T_NONE)
+               return -ENODEV;
+
        mxcs->max_hz = fdtdec_get_int(blob, node, "spi-max-frequency",
                                      20000000);
 
@@ -535,6 +561,8 @@ static int mxc_spi_claim_bus(struct udevice *dev)
        struct mxc_spi_slave *mxcs = dev_get_platdata(dev->parent);
        struct dm_spi_slave_platdata *slave_plat = dev_get_parent_platdata(dev);
 
+       mxcs->dev = dev;
+
        return mxc_spi_claim_bus_internal(mxcs, slave_plat->cs);
 }