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ARM: imx6: gw54xx: add function to retrieve board revision from GSC

PATCH Applied Lucas Stach 2 participants 3 messages May 29, 2017 – Jun 1, 2017 Arm (32-bit)

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Lucas Stach

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#0 lore raw

PATCH 1/2 ARM: imx6: gw54xx: add function to retrieve board revision from GSC

This parses the board revision from the GSC EEPROm model string.

Signed-off-by Lucas Stach <[email protected]>
---
 arch/arm/boards/gateworks-ventana/gsc.c | 14 ++++++++++++++
 arch/arm/boards/gateworks-ventana/gsc.h |  2 ++
 2 files changed, 16 insertions(+)
arch/arm/boards/gateworks-ventana/gsc.c +14 -0
index 3614230..92244d1 100644
@@ -65,3 +65,17 @@ int gsc_i2c_write(struct i2c_client *client, u32 addr, const u8 *buf, u16 count)
 
 	return ret;
 }
+
+char gsc_get_rev(struct i2c_client *client)
+{
+	int i;
+	u8 model[16];
+
+	gsc_i2c_read(client, 0x30, model, 16);
+	for (i = sizeof(model) - 1; i > 0; i--) {
+		if (model[i] >= 'A')
+			return model[i];
+	}
+
+	return 'A';
+}
arch/arm/boards/gateworks-ventana/gsc.h +2 -0
index a6e7e22..13f2262 100644
@@ -56,3 +56,5 @@
  */
 int gsc_i2c_read(struct i2c_client *client, u32 addr, u8 *buf, u16 count);
 int gsc_i2c_write(struct i2c_client *client, u32 addr, const u8 *buf, u16 count);
+
+char gsc_get_rev(struct i2c_client *client);
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author
#1 lore raw

PATCH 2/2 ARM: imx6: gw54xx: fixup watchdog nodes on pre rev E boards

Older boards before revision E don't have the external watchdog signal wired up to the PMIC, so they must use watchdog 1, which is able to reset the SoC internally.

Signed-off-by Lucas Stach <[email protected]>
---
 arch/arm/boards/gateworks-ventana/board.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)
arch/arm/boards/gateworks-ventana/board.c +17 -0
index 82dba7c..3ff142e 100644
@@ -24,6 +24,19 @@
 
 #include "gsc.h"
 
+static int gw54xx_wdog_of_fixup(struct device_node *root, void *context)
+{
+	struct device_node *np;
+
+	/* switch to the watchdog with internal reset capabilities */
+	np = of_find_node_by_name(root, "wdog@020c0000");
+	of_device_disable(np);
+	np = of_find_node_by_name(root, "wdog@020bc000");
+	of_device_enable(np);
+
+	return 0;
+}
+
 static int gw54xx_devices_init(void)
 {
 	struct i2c_client client;

@@ -60,6 +73,10 @@ static int gw54xx_devices_init(void)
 		of_eth_register_ethaddr(dnode, mac);
 	}
 
+	/* boards before rev E don't have the external watchdog signal */
+	if (gsc_get_rev(&client) < 'E')
+		of_register_fixup(gw54xx_wdog_of_fixup, NULL);
+
 	imx6_bbu_nand_register_handler("nand", BBU_HANDLER_FLAG_DEFAULT);
 
 	barebox_set_hostname("gw54xx");
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Applied
#2 lore raw
In reply to Lucas Stach
Quoted 7 lines · Lucas Stach

This parses the board revision from the GSC EEPROm model string.

Signed-off-by Lucas Stach <[email protected]>
---
 arch/arm/boards/gateworks-ventana/gsc.c | 14 ++++++++++++++
 arch/arm/boards/gateworks-ventana/gsc.h |  2 ++
 2 files changed, 16 insertions(+)

Applied, thanks

Sascha

Quoted 42 lines
arch/arm/boards/gateworks-ventana/gsc.c +14 -0
index 3614230..92244d1 100644
@@ -65,3 +65,17 @@ int gsc_i2c_write(struct i2c_client *client, u32 addr, const u8 *buf, u16 count)
 
 	return ret;
 }
+
+char gsc_get_rev(struct i2c_client *client)
+{
+	int i;
+	u8 model[16];
+
+	gsc_i2c_read(client, 0x30, model, 16);
+	for (i = sizeof(model) - 1; i > 0; i--) {
+		if (model[i] >= 'A')
+			return model[i];
+	}
+
+	return 'A';
+}
arch/arm/boards/gateworks-ventana/gsc.h +2 -0
index a6e7e22..13f2262 100644
@@ -56,3 +56,5 @@
  */
 int gsc_i2c_read(struct i2c_client *client, u32 addr, u8 *buf, u16 count);
 int gsc_i2c_write(struct i2c_client *client, u32 addr, const u8 *buf, u16 count);
+
+char gsc_get_rev(struct i2c_client *client);
Signature · 7 lines
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