From c86ce6632e7deb382cfc512388d1d8447b4db2a5 Mon Sep 17 00:00:00 2001
From: p-sam <p-sam@d3vs.net>
Date: Mon, 14 Oct 2024 21:37:34 +0000
Subject: [PATCH] lessen i2c reads

---
 sysmodule/lib/nxExt/include/nxExt/i2c.h |  2 +-
 sysmodule/lib/nxExt/src/i2c.c           |  2 +-
 sysmodule/lib/nxExt/src/max17050.c      | 36 ++++++++++++++++---------
 sysmodule/lib/nxExt/src/tmp451.c        |  4 +--
 sysmodule/src/board.cpp                 |  4 +--
 5 files changed, 29 insertions(+), 19 deletions(-)

diff --git a/sysmodule/lib/nxExt/include/nxExt/i2c.h b/sysmodule/lib/nxExt/include/nxExt/i2c.h
index f2dd8e4..4865642 100644
--- a/sysmodule/lib/nxExt/include/nxExt/i2c.h
+++ b/sysmodule/lib/nxExt/include/nxExt/i2c.h
@@ -17,7 +17,7 @@ extern "C"
 
 #include <switch.h>
 
-Result i2csessionExtSendU8Receive(I2cSession* s, u8 in, void* out, u8 out_size);
+Result i2csessionExtRegReceive(I2cSession* s, u8 in, void* out, u8 out_size);
 
 #ifdef __cplusplus
 }
diff --git a/sysmodule/lib/nxExt/src/i2c.c b/sysmodule/lib/nxExt/src/i2c.c
index 56872c4..9a82cc1 100644
--- a/sysmodule/lib/nxExt/src/i2c.c
+++ b/sysmodule/lib/nxExt/src/i2c.c
@@ -13,7 +13,7 @@
 #define I2C_CMD_SND 0
 #define I2C_CMD_RCV 1
 
-Result i2csessionExtSendU8Receive(I2cSession* s, u8 in, void* out, u8 out_size)
+Result i2csessionExtRegReceive(I2cSession* s, u8 in, void* out, u8 out_size)
 {
     u8 cmdlist[5] = {
         I2C_CMD_SND | (I2cTransactionOption_Start << 6),
diff --git a/sysmodule/lib/nxExt/src/max17050.c b/sysmodule/lib/nxExt/src/max17050.c
index 4eb9100..fe6d00b 100644
--- a/sysmodule/lib/nxExt/src/max17050.c
+++ b/sysmodule/lib/nxExt/src/max17050.c
@@ -40,25 +40,36 @@ static u64 g_update_ticks = 0;
 static s32 g_power_now = 0;
 static s32 g_power_avg = 0;
 
-static Result _max17050_get_power(u8 creg, u8 vreg, s32 *out_mw)
+static Result _max17050_get_power(s32 *out_mw_now, s32 *out_mw_avg)
 {
-    u16 current = 0;
-    u16 voltage = 0;
+    s64 ma, mv;
+    u16 values[3] = {0};
 
-    Result rc = i2csessionExtSendU8Receive(&g_i2c_session, creg, &current, sizeof(current));
+    Result rc = i2csessionExtRegReceive(&g_i2c_session, MAX17050_VCELL, values, sizeof(values));
 
-    if(R_SUCCEEDED(rc))
+    if (R_SUCCEEDED(rc))
     {
-        rc = i2csessionExtSendU8Receive(&g_i2c_session, vreg, &voltage, sizeof(voltage));
+        ma = (s16)values[1];
+        ma = ma * 1562500 / (MAX17050_BOARD_SNS_RESISTOR_UOHM * MAX17050_BOARD_CGAIN);
+
+        mv = (int)(values[0] >> 3) * 625 / 1000;
+
+        *out_mw_now = ma * mv / 1000000;
     }
 
-    if(R_SUCCEEDED(rc))
+    if (R_SUCCEEDED(rc))
     {
-        s64 ma = (s16)current;
-        ma *= 1562500 / (MAX17050_BOARD_SNS_RESISTOR_UOHM * MAX17050_BOARD_CGAIN);
+        rc = i2csessionExtRegReceive(&g_i2c_session, MAX17050_AvgVCELL, values, sizeof(u16));
+    }
+
+    if (R_SUCCEEDED(rc))
+    {
+        ma = (s16)values[2];
+        ma = ma * 1562500 / (MAX17050_BOARD_SNS_RESISTOR_UOHM * MAX17050_BOARD_CGAIN);
+
+        mv = (int)(values[0] >> 3) * 625 / 1000;
 
-        s64 mv = (int)(voltage >> 3) * 625 / 1000;
-        *out_mw = ma * mv / 1000000;
+        *out_mw_avg = ma * mv / 1000000;
     }
 
     return rc;
@@ -79,8 +90,7 @@ static void _max17050_update()
         return;
     }
 
-    _max17050_get_power(MAX17050_Current, MAX17050_VCELL, &g_power_now);
-    _max17050_get_power(MAX17050_AvgCurrent, MAX17050_AvgVCELL, &g_power_avg);
+    _max17050_get_power(&g_power_now, &g_power_avg);
 }
 
 Result max17050Initialize(void)
diff --git a/sysmodule/lib/nxExt/src/tmp451.c b/sysmodule/lib/nxExt/src/tmp451.c
index a871b43..90c8d1c 100644
--- a/sysmodule/lib/nxExt/src/tmp451.c
+++ b/sysmodule/lib/nxExt/src/tmp451.c
@@ -36,12 +36,12 @@ static s32 g_temp_soc = 0;
 static Result _tmp451_get_temp(u8 reg, u8 dec_reg, s32* out)
 {
     u8 val = 0;
-    Result rc = i2csessionExtSendU8Receive(&g_i2c_session, reg, &val, sizeof(val));
+    Result rc = i2csessionExtRegReceive(&g_i2c_session, reg, &val, sizeof(val));
 
     if(R_SUCCEEDED(rc))
     {
         *out = (s32)val * 1000;
-        rc = i2csessionExtSendU8Receive(&g_i2c_session, dec_reg, &val, sizeof(val));
+        rc = i2csessionExtRegReceive(&g_i2c_session, dec_reg, &val, sizeof(val));
     }
 
     if(R_SUCCEEDED(rc))
diff --git a/sysmodule/src/board.cpp b/sysmodule/src/board.cpp
index c1dfafa..b6d9d98 100644
--- a/sysmodule/src/board.cpp
+++ b/sysmodule/src/board.cpp
@@ -98,7 +98,7 @@ void Board::Initialize()
     ASSERT_RESULT_OK(rc, "max17050Initialize");
 
     rc = tmp451Initialize();
-    ASSERT_RESULT_OK(rc, "max17050Initialize");
+    ASSERT_RESULT_OK(rc, "tmp451Initialize");
 
     FetchHardwareInfos();
 }
@@ -374,4 +374,4 @@ void Board::FetchHardwareInfos()
         default:
             g_socType = SysClkSocType_Erista;
     }
-}
\ No newline at end of file
+}