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