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Date: Tue, 7 Aug 2018 18:32:05 +0100
From: Ben Whitten <ben.whitten@...il.com>
To: afaerber@...e.de, starnight@...cu.edu.tw, hasnain.virk@....com
Cc: netdev@...r.kernel.org, Ben Whitten <ben.whitten@...rdtech.com>
Subject: [PATCH lora-next 04/10] net: lora: sx1301: convert probe function to regmap access
From: Ben Whitten <ben.whitten@...rdtech.com>
Keeping change sets small we convert the probe function over to regmap
and regmap_field access for initialisation.
Signed-off-by: Ben Whitten <ben.whitten@...rdtech.com>
---
drivers/net/lora/sx1301.c | 155 +++++++++-------------------------------------
drivers/net/lora/sx1301.h | 7 +++
2 files changed, 35 insertions(+), 127 deletions(-)
diff --git a/drivers/net/lora/sx1301.c b/drivers/net/lora/sx1301.c
index 54bfc31..118e8d8 100644
--- a/drivers/net/lora/sx1301.c
+++ b/drivers/net/lora/sx1301.c
@@ -379,11 +379,6 @@ static int sx1301_page_write(struct spi_device *spi, u8 page, u8 reg, u8 val)
return sx1301_write(spi, reg, val);
}
-static int sx1301_soft_reset(struct spi_device *spi)
-{
- return sx1301_write(spi, REG_PAGE_RESET, REG_PAGE_RESET_SOFT_RESET);
-}
-
#define REG_RADIO_X_DATA 0
#define REG_RADIO_X_DATA_READBACK 1
#define REG_RADIO_X_ADDR 2
@@ -854,7 +849,6 @@ static int sx1301_probe(struct spi_device *spi)
int ret;
int i;
unsigned int ver;
- u8 val;
rst = devm_gpiod_get_optional(&spi->dev, "reset", GPIOD_OUT_LOW);
if (IS_ERR(rst))
@@ -911,96 +905,46 @@ static int sx1301_probe(struct spi_device *spi)
return ret;
}
- if (ver != 103) {
+ if (ver != SX1301_CHIP_VERSION) {
dev_err(&spi->dev, "unexpected version: %u\n", ver);
return -ENXIO;
}
- ret = sx1301_write(spi, REG_PAGE_RESET, 0);
+ ret = regmap_write(priv->regmap, SX1301_PAGE, 0);
if (ret) {
dev_err(&spi->dev, "page/reset write failed\n");
return ret;
}
- ret = sx1301_soft_reset(spi);
+ ret = sx1301_field_write(priv, F_SOFT_RESET, 1);
if (ret) {
dev_err(&spi->dev, "soft reset failed\n");
return ret;
}
- ret = sx1301_read(spi, 16, &val);
- if (ret) {
- dev_err(&spi->dev, "16 read failed\n");
- return ret;
- }
-
- val &= ~REG_16_GLOBAL_EN;
-
- ret = sx1301_write(spi, 16, val);
- if (ret) {
- dev_err(&spi->dev, "16 write failed\n");
- return ret;
- }
-
- ret = sx1301_read(spi, 17, &val);
- if (ret) {
- dev_err(&spi->dev, "17 read failed\n");
- return ret;
- }
-
- val &= ~REG_17_CLK32M_EN;
-
- ret = sx1301_write(spi, 17, val);
- if (ret) {
- dev_err(&spi->dev, "17 write failed\n");
- return ret;
- }
-
- ret = sx1301_page_read(spi, 2, 43, &val);
- if (ret) {
- dev_err(&spi->dev, "2|43 read failed\n");
+ /* gate clocks */
+ ret = sx1301_field_write(priv, F_GLOBAL_EN, 0);
+ if (ret)
return ret;
- }
-
- val |= REG_2_43_RADIO_B_EN | REG_2_43_RADIO_A_EN;
-
- ret = sx1301_page_write(spi, 2, 43, val);
- if (ret) {
- dev_err(&spi->dev, "2|43 write failed\n");
+ ret = sx1301_field_write(priv, F_CLK32M_EN, 0);
+ if (ret)
return ret;
- }
- msleep(500);
-
- ret = sx1301_page_read(spi, 2, 43, &val);
- if (ret) {
- dev_err(&spi->dev, "2|43 read failed\n");
+ /* switch on and reset the radios (also starts the 32 MHz XTAL) */
+ ret = sx1301_field_write(priv, F_RADIO_A_EN, 1);
+ if (ret)
return ret;
- }
-
- val |= REG_2_43_RADIO_RST;
-
- ret = sx1301_page_write(spi, 2, 43, val);
- if (ret) {
- dev_err(&spi->dev, "2|43 write failed\n");
+ ret = sx1301_field_write(priv, F_RADIO_B_EN, 1);
+ if (ret)
return ret;
- }
-
- msleep(5);
-
- ret = sx1301_page_read(spi, 2, 43, &val);
- if (ret) {
- dev_err(&spi->dev, "2|43 read failed\n");
+ mdelay(500);
+ ret = sx1301_field_write(priv, F_RADIO_RST, 1);
+ if (ret)
return ret;
- }
-
- val &= ~REG_2_43_RADIO_RST;
-
- ret = sx1301_page_write(spi, 2, 43, val);
- if (ret) {
- dev_err(&spi->dev, "2|43 write failed\n");
+ mdelay(5);
+ ret = sx1301_field_write(priv, F_RADIO_RST, 0);
+ if (ret)
return ret;
- }
/* radio A */
@@ -1047,65 +991,22 @@ static int sx1301_probe(struct spi_device *spi)
}
/* GPIO */
-
- ret = sx1301_read(spi, REG_GPIO_MODE, &val);
- if (ret) {
- dev_err(&spi->dev, "GPIO mode read failed\n");
- return ret;
- }
-
- val |= GENMASK(4, 0);
-
- ret = sx1301_write(spi, REG_GPIO_MODE, val);
- if (ret) {
- dev_err(&spi->dev, "GPIO mode write failed\n");
- return ret;
- }
-
- ret = sx1301_read(spi, REG_GPIO_SELECT_OUTPUT, &val);
- if (ret) {
- dev_err(&spi->dev, "GPIO select output read failed\n");
+ ret = regmap_write(priv->regmap, SX1301_GPMODE, 0x1F);
+ if (ret)
return ret;
- }
-
- val &= ~GENMASK(3, 0);
- val |= 2;
-
- ret = sx1301_write(spi, REG_GPIO_SELECT_OUTPUT, val);
- if (ret) {
- dev_err(&spi->dev, "GPIO select output write failed\n");
+ ret = regmap_write(priv->regmap, SX1301_GPSO, 0x2);
+ if (ret)
return ret;
- }
/* TODO LBT */
- ret = sx1301_read(spi, 16, &val);
- if (ret) {
- dev_err(&spi->dev, "16 read (1) failed\n");
- return ret;
- }
-
- val |= REG_16_GLOBAL_EN;
-
- ret = sx1301_write(spi, 16, val);
- if (ret) {
- dev_err(&spi->dev, "16 write (1) failed\n");
- return ret;
- }
-
- ret = sx1301_read(spi, 17, &val);
- if (ret) {
- dev_err(&spi->dev, "17 read (1) failed\n");
+ /* start clocks */
+ ret = sx1301_field_write(priv, F_GLOBAL_EN, 1);
+ if (ret)
return ret;
- }
-
- val |= REG_17_CLK32M_EN;
-
- ret = sx1301_write(spi, 17, val);
- if (ret) {
- dev_err(&spi->dev, "17 write (1) failed\n");
+ ret = sx1301_field_write(priv, F_CLK32M_EN, 1);
+ if (ret)
return ret;
- }
/* calibration */
diff --git a/drivers/net/lora/sx1301.h b/drivers/net/lora/sx1301.h
index abfb7b5..0e84703 100644
--- a/drivers/net/lora/sx1301.h
+++ b/drivers/net/lora/sx1301.h
@@ -8,6 +8,13 @@
#ifndef _SX1301_
#define _SX1301_
+#define SX1301_CHIP_VERSION 103
+
+#define SX1301_MCU_FW_BYTE 8192
+#define SX1301_MCU_ARB_FW_VERSION 1
+#define SX1301_MCU_AGC_FW_VERSION 4
+#define SX1301_MCU_AGC_CAL_FW_VERSION 2
+
/* Page independent */
#define SX1301_PAGE 0x00
#define SX1301_VER 0x01
--
2.7.4
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