Use dt-bindings for GSC hwmon devices.
Signed-off-by: Tim Harvey tharvey@gateworks.com --- board/gateworks/gw_ventana/gsc.c | 172 ++++++++++++++++++++----------- 1 file changed, 113 insertions(+), 59 deletions(-)
diff --git a/board/gateworks/gw_ventana/gsc.c b/board/gateworks/gw_ventana/gsc.c index ffed6b5fc8..443ecea572 100644 --- a/board/gateworks/gw_ventana/gsc.c +++ b/board/gateworks/gw_ventana/gsc.c @@ -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; }