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imx: ventana: use dt for hwmon

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Use dt-bindings for GSC hwmon devices.

Signed-off-by: Tim Harvey <tharvey@gateworks.com>
This commit is contained in:
Tim Harvey 2021-07-24 10:40:41 -07:00 committed by Stefano Babic
parent 49b4efe621
commit 2d02586028
1 changed files with 113 additions and 59 deletions
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172
board/gateworks/gw_ventana/gsc.c
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@ -15,10 +15,13 @@
#include <linux/ctype.h>
#include <asm/arch/sys_proto.h>
#include <asm/global_data.h>
#include "ventana_eeprom.h"
#include "gsc.h"
DECLARE_GLOBAL_DATA_PTR;
/*
* The Gateworks System Controller will fail to ACK a master transaction if
* it is busy, which can occur during its 1HZ timer tick while reading ADC's.
@ -65,24 +68,116 @@ int gsc_i2c_write(uchar chip, uint addr, int alen, uchar *buf, int len)
return ret;
}
static void read_hwmon(const char *name, uint reg, uint size)
int gsc_get_board_temp(void)
{
unsigned char buf[3];
uint ui;
const void *fdt = gd->fdt_blob;
int node, reg, mode, val;
const char *label;
u8 buf[2];
int ret;
printf("%-8s:", name);
memset(buf, 0, sizeof(buf));
if (gsc_i2c_read(GSC_HWMON_ADDR, reg, 1, buf, size)) {
puts("fRD\n");
} else {
ui = buf[0] | (buf[1]<<8) | (buf[2]<<16);
if (size == 2 && ui > 0x8000)
ui -= 0xffff;
if (ui == 0xffffff)
puts("invalid\n");
else
printf("%d\n", ui);
node = fdt_node_offset_by_compatible(fdt, -1, "gw,gsc-adc");
if (node <= 0)
return node;
i2c_set_bus_num(0);
/* iterate over hwmon nodes */
node = fdt_first_subnode(fdt, node);
while (node > 0) {
reg = fdtdec_get_int(fdt, node, "reg", -1);
mode = fdtdec_get_int(fdt, node, "gw,mode", -1);
label = fdt_stringlist_get(fdt, node, "label", 0, NULL);
if ((reg == -1) || (mode == -1) || !label) {
printf("invalid dt:%s\n", fdt_get_name(fdt, node, NULL));
continue;
}
if ((mode != 0) || strcmp(label, "temp"))
continue;
memset(buf, 0, sizeof(buf));
ret = gsc_i2c_read(GSC_HWMON_ADDR, reg, 1, buf, sizeof(buf));
val = buf[0] | buf[1] << 8;
if (val >= 0) {
if (val > 0x8000)
val -= 0xffff;
return val;
}
node = fdt_next_subnode(fdt, node);
}
return 0;
}
/* display hardware monitor ADC channels */
int gsc_hwmon(void)
{
const void *fdt = gd->fdt_blob;
int node, reg, mode, len, val, offset;
const char *label;
u8 buf[2];
int ret;
node = fdt_node_offset_by_compatible(fdt, -1, "gw,gsc-adc");
if (node <= 0)
return node;
i2c_set_bus_num(0);
/* iterate over hwmon nodes */
node = fdt_first_subnode(fdt, node);
while (node > 0) {
reg = fdtdec_get_int(fdt, node, "reg", -1);
mode = fdtdec_get_int(fdt, node, "gw,mode", -1);
offset = fdtdec_get_int(fdt, node, "gw,voltage-offset-microvolt", 0);
label = fdt_stringlist_get(fdt, node, "label", 0, NULL);
if ((reg == -1) || (mode == -1) || !label)
printf("invalid dt:%s\n", fdt_get_name(fdt, node, NULL));
memset(buf, 0, sizeof(buf));
ret = gsc_i2c_read(GSC_HWMON_ADDR, reg, 1, buf, sizeof(buf));
val = buf[0] | buf[1] << 8;
if (val >= 0) {
const u32 *div;
int r[2];
switch (mode) {
case 0: /* temperature (C*10) */
if (val > 0x8000)
val -= 0xffff;
printf("%-8s: %d.%ldC\n", label, val / 10, abs(val % 10));
break;
case 1: /* prescaled voltage */
if (val != 0xffff)
printf("%-8s: %d.%03dV\n", label, val / 1000, val % 1000);
break;
case 2: /* scaled based on ref volt and resolution */
val *= 2500;
val /= 1 << 12;
/* apply pre-scaler voltage divider */
div = fdt_getprop(fdt, node, "gw,voltage-divider-ohms", &len);
if (div && (len == sizeof(uint32_t) * 2)) {
r[0] = fdt32_to_cpu(div[0]);
r[1] = fdt32_to_cpu(div[1]);
if (r[0] && r[1]) {
val *= (r[0] + r[1]);
val /= r[1];
}
}
/* adjust by offset */
val += (offset / 1000);
printf("%-8s: %d.%03dV\n", label, val / 1000, val % 1000);
break;
}
}
node = fdt_next_subnode(fdt, node);
}
return 0;
}
int gsc_info(int verbose)
@ -103,54 +198,13 @@ int gsc_info(int verbose)
gsc_i2c_write(GSC_SC_ADDR, GSC_SC_STATUS, 1,
&buf[GSC_SC_STATUS], 1);
}
if (!gsc_i2c_read(GSC_HWMON_ADDR, GSC_HWMON_TEMP, 1, buf, 2)) {
int ui = buf[0] | buf[1]<<8;
if (ui > 0x8000)
ui -= 0xffff;
printf(" board temp at %dC", ui / 10);
}
printf(" board temp at %dC", gsc_get_board_temp() / 10);
puts("\n");
if (!verbose)
return CMD_RET_SUCCESS;
read_hwmon("Temp", GSC_HWMON_TEMP, 2);
read_hwmon("VIN", GSC_HWMON_VIN, 3);
read_hwmon("VBATT", GSC_HWMON_VBATT, 3);
read_hwmon("VDD_3P3", GSC_HWMON_VDD_3P3, 3);
read_hwmon("VDD_ARM", GSC_HWMON_VDD_CORE, 3);
read_hwmon("VDD_SOC", GSC_HWMON_VDD_SOC, 3);
read_hwmon("VDD_HIGH", GSC_HWMON_VDD_HIGH, 3);
read_hwmon("VDD_DDR", GSC_HWMON_VDD_DDR, 3);
read_hwmon("VDD_5P0", GSC_HWMON_VDD_5P0, 3);
if (strncasecmp((const char*) ventana_info.model, "GW553", 5))
read_hwmon("VDD_2P5", GSC_HWMON_VDD_2P5, 3);
read_hwmon("VDD_1P8", GSC_HWMON_VDD_1P8, 3);
read_hwmon("VDD_IO2", GSC_HWMON_VDD_IO2, 3);
switch (ventana_info.model[3]) {
case '1': /* GW51xx */
read_hwmon("VDD_IO3", GSC_HWMON_VDD_IO4, 3); /* -C rev */
break;
case '2': /* GW52xx */
break;
case '3': /* GW53xx */
read_hwmon("VDD_IO4", GSC_HWMON_VDD_IO4, 3); /* -C rev */
read_hwmon("VDD_GPS", GSC_HWMON_VDD_IO3, 3);
break;
case '4': /* GW54xx */
read_hwmon("VDD_IO3", GSC_HWMON_VDD_IO4, 3); /* -C rev */
read_hwmon("VDD_GPS", GSC_HWMON_VDD_IO3, 3);
break;
case '5': /* GW55xx */
break;
case '6': /* GW560x */
read_hwmon("VDD_IO4", GSC_HWMON_VDD_IO4, 3);
read_hwmon("VDD_GPS", GSC_HWMON_VDD_IO3, 3);
break;
case '9': /* GW590x */
read_hwmon("AMONBMON", GSC_HWMON_VDD_IO3, 3);
read_hwmon("BAT_VOLT", GSC_HWMON_VDD_EXT, 3);
read_hwmon("BAT_TEMP", GSC_HWMON_VDD_IO4, 2);
}
gsc_hwmon();
return 0;
}