#include <linux/compiler.h>
#include <fdtdec.h>
+DECLARE_GLOBAL_DATA_PTR;
+
struct bcm283x_mu_regs {
u32 io;
u32 iir;
struct bcm283x_mu_regs *regs = priv->regs;
u32 divider;
- if (plat->skip_init)
+ if (plat->disabled || plat->skip_init)
return 0;
divider = plat->clock / (baudrate * 8);
struct bcm283x_mu_serial_platdata *plat = dev_get_platdata(dev);
struct bcm283x_mu_priv *priv = dev_get_priv(dev);
+ if (plat->disabled)
+ return -ENODEV;
+
priv->regs = (struct bcm283x_mu_regs *)plat->base;
return 0;
static int bcm283x_mu_serial_getc(struct udevice *dev)
{
+ struct bcm283x_mu_serial_platdata *plat = dev_get_platdata(dev);
struct bcm283x_mu_priv *priv = dev_get_priv(dev);
struct bcm283x_mu_regs *regs = priv->regs;
u32 data;
+ if (plat->disabled)
+ return -EAGAIN;
+
/* Wait until there is data in the FIFO */
if (!(readl(®s->lsr) & BCM283X_MU_LSR_RX_READY))
return -EAGAIN;
static int bcm283x_mu_serial_putc(struct udevice *dev, const char data)
{
+ struct bcm283x_mu_serial_platdata *plat = dev_get_platdata(dev);
struct bcm283x_mu_priv *priv = dev_get_priv(dev);
struct bcm283x_mu_regs *regs = priv->regs;
+ if (plat->disabled)
+ return 0;
+
/* Wait until there is space in the FIFO */
if (!(readl(®s->lsr) & BCM283X_MU_LSR_TX_EMPTY))
return -EAGAIN;
static int bcm283x_mu_serial_pending(struct udevice *dev, bool input)
{
+ struct bcm283x_mu_serial_platdata *plat = dev_get_platdata(dev);
struct bcm283x_mu_priv *priv = dev_get_priv(dev);
struct bcm283x_mu_regs *regs = priv->regs;
- unsigned int lsr = readl(®s->lsr);
+ unsigned int lsr;
+
+ if (plat->disabled)
+ return 0;
+
+ lsr = readl(®s->lsr);
if (input) {
WATCHDOG_RESET();
.setbrg = bcm283x_mu_serial_setbrg,
};
+#if CONFIG_IS_ENABLED(OF_CONTROL)
+static const struct udevice_id bcm283x_mu_serial_id[] = {
+ {.compatible = "brcm,bcm2835-aux-uart"},
+ {}
+};
+
+static int bcm283x_mu_serial_ofdata_to_platdata(struct udevice *dev)
+{
+ struct bcm283x_mu_serial_platdata *plat = dev_get_platdata(dev);
+ fdt_addr_t addr;
+
+ addr = devfdt_get_addr(dev);
+ if (addr == FDT_ADDR_T_NONE)
+ return -EINVAL;
+
+ plat->base = addr;
+ plat->clock = fdtdec_get_int(gd->fdt_blob, dev_of_offset(dev), "clock",
+ 1);
+ plat->skip_init = fdtdec_get_bool(gd->fdt_blob, dev_of_offset(dev),
+ "skip-init");
+ plat->disabled = false;
+ return 0;
+}
+#endif
+
U_BOOT_DRIVER(serial_bcm283x_mu) = {
.name = "serial_bcm283x_mu",
.id = UCLASS_SERIAL,
+ .of_match = of_match_ptr(bcm283x_mu_serial_id),
+ .ofdata_to_platdata = of_match_ptr(bcm283x_mu_serial_ofdata_to_platdata),
.platdata_auto_alloc_size = sizeof(struct bcm283x_mu_serial_platdata),
.probe = bcm283x_mu_serial_probe,
.ops = &bcm283x_mu_serial_ops,