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drivers: serial: migrate mpc8xx to DM

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Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
This commit is contained in:
Christophe Leroy 2018-11-21 08:51:49 +00:00 committed by Tom Rini
parent 4c4ca6cdd5
commit bdfa11ebcf
1 changed files with 74 additions and 3 deletions
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77
drivers/serial/serial_mpc8xx.c
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@ -6,6 +6,7 @@
#include <common.h>
#include <command.h>
#include <dm.h>
#include <serial.h>
#include <watchdog.h>
#include <asm/cpm_8xx.h>
@ -35,9 +36,9 @@ struct serialbuffer {
uchar txbuf; /* tx buffers */
};
static void serial_setdivisor(cpm8xx_t __iomem *cp)
static void serial_setdivisor(cpm8xx_t __iomem *cp, int baudrate)
{
int divisor = (gd->cpu_clk + 8 * gd->baudrate) / 16 / gd->baudrate;
int divisor = (gd->cpu_clk + 8 * baudrate) / 16 / baudrate;
if (divisor / 16 > 0x1000) {
/* bad divisor, assume 50MHz clock and 9600 baud */
@ -71,7 +72,7 @@ static void smc_setbrg(void)
out_be32(&cp->cp_simode, 0);
serial_setdivisor(cp);
serial_setdivisor(cp, gd->baudrate);
}
static int smc_init(void)
@ -186,11 +187,13 @@ static void smc_putc(const char c)
WATCHDOG_RESET();
}
#ifndef CONFIG_DM_SERIAL
static void smc_puts(const char *s)
{
while (*s)
smc_putc(*s++);
}
#endif
static int smc_getc(void)
{
@ -233,6 +236,7 @@ static int smc_tstc(void)
return !(in_be16(&rtx->rxbd.cbd_sc) & BD_SC_EMPTY);
}
#ifndef CONFIG_DM_SERIAL
struct serial_device serial_smc_device = {
.name = "serial_smc",
.start = smc_init,
@ -253,3 +257,70 @@ void mpc8xx_serial_initialize(void)
{
serial_register(&serial_smc_device);
}
#endif
#ifdef CONFIG_DM_SERIAL
static int serial_mpc8xx_setbrg(struct udevice *dev, int baudrate)
{
immap_t __iomem *im = (immap_t __iomem *)CONFIG_SYS_IMMR;
cpm8xx_t __iomem *cp = &(im->im_cpm);
/* Set up the baud rate generator.
* See 8xx_io/commproc.c for details.
*
* Wire BRG1 to SMCx
*/
out_be32(&cp->cp_simode, 0);
serial_setdivisor(cp, baudrate);
return 0;
}
static int serial_mpc8xx_probe(struct udevice *dev)
{
return smc_init();
}
static int serial_mpc8xx_putc(struct udevice *dev, const char ch)
{
smc_putc(ch);
return 0;
}
static int serial_mpc8xx_getc(struct udevice *dev)
{
return smc_getc();
}
static int serial_mpc8xx_pending(struct udevice *dev, bool input)
{
if (input)
return smc_tstc();
return 0;
}
static const struct dm_serial_ops serial_mpc8xx_ops = {
.putc = serial_mpc8xx_putc,
.pending = serial_mpc8xx_pending,
.getc = serial_mpc8xx_getc,
.setbrg = serial_mpc8xx_setbrg,
};
static const struct udevice_id serial_mpc8xx_ids[] = {
{ .compatible = "fsl,pq1-smc" },
{ }
};
U_BOOT_DRIVER(serial_mpc8xx) = {
.name = "serial_mpc8xx",
.id = UCLASS_SERIAL,
.of_match = serial_mpc8xx_ids,
.probe = serial_mpc8xx_probe,
.ops = &serial_mpc8xx_ops,
.flags = DM_FLAG_PRE_RELOC,
};
#endif