Merge tag 'KARO-TX6-2015-03-24' into uboot-merge

[karo-tx-uboot.git] / board / karo / tx6 / rn5t618.c

diff --git a/board/karo/tx6/rn5t618.c b/board/karo/tx6/rn5t618.c
new file mode 100644 (file)
index 0000000..19aba87
--- /dev/null
+++ b/board/karo/tx6/rn5t618.c
@@ -0,0 +1,155 @@
+/*
+ * Copyright (C) 2014 Lothar Waßmann <LW@KARO-electronics.de>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <common.h>
+#include <i2c.h>
+
+#include "pmic.h"
+
+#define RN5T618_NOETIMSET      0x11
+#define RN5T618_LDORTC1_SLOT   0x2a
+#define RN5T618_DC1CTL         0x2c
+#define RN5T618_DC1CTL2                0x2d
+#define RN5T618_DC2CTL         0x2e
+#define RN5T618_DC2CTL2                0x2f
+#define RN5T618_DC3CTL         0x30
+#define RN5T618_DC3CTL2                0x31
+#define RN5T618_DC1DAC         0x36 /* CORE */
+#define RN5T618_DC2DAC         0x37 /* SOC */
+#define RN5T618_DC3DAC         0x38 /* DDR */
+#define RN5T618_DC1DAC_SLP     0x3b
+#define RN5T618_DC2DAC_SLP     0x3c
+#define RN5T618_DC3DAC_SLP     0x3d
+#define RN5T618_LDOEN1         0x44
+#define RN5T618_LDODIS         0x46
+#define RN5T618_LDOEN2         0x48
+#define RN5T618_LDO3DAC                0x4e /* IO */
+#define RN5T618_LDORTCDAC      0x56 /* VBACKUP */
+
+#define VDD_RTC_VAL            mV_to_regval_rtc(3000)
+#define VDD_HIGH_VAL           mV_to_regval3(3000)
+#define VDD_HIGH_VAL_LP                mV_to_regval3(3000)
+#define VDD_CORE_VAL           mV_to_regval(1425)              /* DCDC1 */
+#define VDD_CORE_VAL_LP                mV_to_regval(900)
+#define VDD_SOC_VAL            mV_to_regval(1425)              /* DCDC2 */
+#define VDD_SOC_VAL_LP         mV_to_regval(900)
+#define VDD_DDR_VAL            mV_to_regval(1500)              /* DCDC3 */
+#define VDD_DDR_VAL_LP         mV_to_regval(1500)
+
+/* calculate voltages in 10mV */
+#define v2r(v,n,m)             DIV_ROUND(((((v) < (n)) ? (n) : (v)) - (n)), (m))
+#define r2v(r,n,m)             (((r) * (m) + (n)) / 10)
+
+/* DCDC1-3 */
+#define mV_to_regval(mV)       v2r((mV) * 10, 6000, 125)
+#define regval_to_mV(r)                r2v(r, 6000, 125)
+
+/* LDO1-2 */
+#define mV_to_regval2(mV)      v2r((mV) * 10, 9000, 250)
+#define regval2_to_mV(r)       r2v(r, 9000, 250)
+
+/* LDO3 */
+#define mV_to_regval3(mV)      v2r((mV) * 10, 6000, 250)
+#define regval3_to_mV(r)       r2v(r, 6000, 250)
+
+/* LDORTC */
+#define mV_to_regval_rtc(mV)   v2r((mV) * 10, 17000, 250)
+#define regval_rtc_to_mV(r)    r2v(r, 17000, 250)
+
+static struct rn5t618_regs {
+       u8 addr;
+       u8 val;
+       u8 mask;
+} rn5t618_regs[] = {
+       { RN5T618_NOETIMSET, 0, },
+       { RN5T618_DC1DAC, VDD_CORE_VAL, },
+       { RN5T618_DC2DAC, VDD_SOC_VAL, },
+       { RN5T618_DC3DAC, VDD_DDR_VAL, },
+       { RN5T618_DC1DAC_SLP, VDD_CORE_VAL_LP, },
+       { RN5T618_DC2DAC_SLP, VDD_SOC_VAL_LP, },
+       { RN5T618_DC3DAC_SLP, VDD_DDR_VAL_LP, },
+       { RN5T618_LDOEN1, 0x01f, ~0x1f, },
+       { RN5T618_LDOEN2, 0x10, ~0x30, },
+       { RN5T618_LDODIS, 0x00, },
+       { RN5T618_LDO3DAC, VDD_HIGH_VAL, },
+       { RN5T618_LDORTCDAC, VDD_RTC_VAL, },
+       { RN5T618_LDORTC1_SLOT, 0x0f, ~0x3f, },
+};
+
+static int rn5t618_setup_regs(uchar slave_addr, struct rn5t618_regs *r,
+                       size_t count)
+{
+       int ret;
+       int i;
+
+       for (i = 0; i < count; i++, r++) {
+#ifdef DEBUG
+               unsigned char value;
+
+               ret = i2c_read(slave_addr, r->addr, 1, &value, 1);
+               if ((value & ~r->mask) != r->val) {
+                       printf("Changing PMIC reg %02x from %02x to %02x\n",
+                               r->addr, value, r->val);
+               }
+               if (ret) {
+                       printf("%s: failed to read PMIC register %02x: %d\n",
+                               __func__, r->addr, ret);
+                       return ret;
+               }
+#endif
+               ret = i2c_write(slave_addr, r->addr, 1, &r->val, 1);
+               if (ret) {
+                       printf("%s: failed to write PMIC register %02x: %d\n",
+                               __func__, r->addr, ret);
+                       return ret;
+               }
+       }
+       return 0;
+}
+
+int rn5t618_pmic_setup(uchar slave_addr)
+{
+       int ret;
+       unsigned char value;
+
+       ret = i2c_read(slave_addr, 0x11, 1, &value, 1);
+       if (ret) {
+               printf("%s: i2c_read error: %d\n", __func__, ret);
+               return ret;
+       }
+
+       ret = rn5t618_setup_regs(slave_addr, rn5t618_regs,
+                               ARRAY_SIZE(rn5t618_regs));
+       if (ret)
+               return ret;
+
+       ret = i2c_read(slave_addr, RN5T618_DC1DAC, 1, &value, 1);
+       if (ret == 0) {
+               printf("VDDCORE set to %umV\n", regval_to_mV(value));
+       } else {
+               printf("Failed to read VDDCORE register setting\n");
+       }
+
+       ret = i2c_read(slave_addr, RN5T618_DC2DAC, 1, &value, 1);
+       if (ret == 0) {
+               printf("VDDSOC  set to %umV\n", regval_to_mV(value));
+       } else {
+               printf("Failed to read VDDSOC register setting\n");
+       }
+
+       return ret;
+}