[PATCH v1 1/4] ARM: rpi: convert board code to a driver

[PATCH v1 1/4] ARM: rpi: convert board code to a driver

[Oleksij Rempel]

Convert board code to a driver model. This will prevent executing this
part of code on any other BCM2xxx based boards.

Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
---
 arch/arm/boards/raspberry-pi/rpi-common.c | 40 +++++++++++++++++++++--
 1 file changed, 38 insertions(+), 2 deletions(-)

diff --git a/arch/arm/boards/raspberry-pi/rpi-common.c b/arch/arm/boards/raspberry-pi/rpi-common.c
index 2684bd5ed7..43e7e66e0f 100644
--- a/arch/arm/boards/raspberry-pi/rpi-common.c
+++ b/arch/arm/boards/raspberry-pi/rpi-common.c
@@ -511,7 +511,7 @@ static void rpi_vc_fdt(void)
 	}
 }
 
-static int rpi_devices_init(void)
+static int rpi_devices_probe(struct device_d *dev)
 {
 	struct regulator *reg;
 
@@ -529,4 +529,40 @@ static int rpi_devices_init(void)
 
 	return 0;
 }
-late_initcall(rpi_devices_init);
+
+static const struct of_device_id rpi_of_match[] = {
+	/* BCM2711 based Boards */
+	{ .compatible = "raspberrypi,400" },
+	{ .compatible = "raspberrypi,4-compute-module" },
+	{ .compatible = "raspberrypi,4-model-b" },
+
+	/* BCM2835 based Boards */
+	{ .compatible = "raspberrypi,model-a" },
+	{ .compatible = "raspberrypi,model-a-plus" },
+	{ .compatible = "raspberrypi,model-b" },
+	/* Raspberry Pi Model B (no P5) */
+	{ .compatible = "raspberrypi,model-b-i2c0" },
+	{ .compatible = "raspberrypi,model-b-rev2" },
+	{ .compatible = "raspberrypi,model-b-plus" },
+	{ .compatible = "raspberrypi,compute-module" },
+	{ .compatible = "raspberrypi,model-zero" },
+	{ .compatible = "raspberrypi,model-zero-w" },
+
+	/* BCM2836 based Boards */
+	{ .compatible = "raspberrypi,2-model-b" },
+
+	/* BCM2837 based Boards */
+	{ .compatible = "raspberrypi,3-model-a-plus" },
+	{ .compatible = "raspberrypi,3-model-b" },
+	{ .compatible = "raspberrypi,3-model-b-plus" },
+	{ .compatible = "raspberrypi,3-compute-module" },
+	{ .compatible = "raspberrypi,3-compute-module-lite" },
+	{ /* sentinel */ },
+};
+
+static struct driver_d rpi_board_driver = {
+	.name = "board-rpi",
+	.probe = rpi_devices_probe,
+	.of_compatible = DRV_OF_COMPAT(rpi_of_match),
+};
+late_platform_driver(rpi_board_driver);
-- 
2.30.2


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[PATCH v1 2/4] ARM: rpi: move clk support to a separate driver and enable deep-probe

[Oleksij Rempel]

To make deep-probe work properly, we need clock support be registered as
driver to related device.

To avoid regression, deep-probe is enabled in the same patch.

Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
---
 arch/arm/boards/raspberry-pi/rpi-common.c | 75 +-----------------
 drivers/clk/Makefile                      |  1 +
 drivers/clk/clk-rpi.c                     | 93 +++++++++++++++++++++++
 3 files changed, 96 insertions(+), 73 deletions(-)
 create mode 100644 drivers/clk/clk-rpi.c

diff --git a/arch/arm/boards/raspberry-pi/rpi-common.c b/arch/arm/boards/raspberry-pi/rpi-common.c
index 43e7e66e0f..53c476c22a 100644
--- a/arch/arm/boards/raspberry-pi/rpi-common.c
+++ b/arch/arm/boards/raspberry-pi/rpi-common.c
@@ -2,6 +2,7 @@
 // SPDX-FileCopyrightText: 2009 Carlo Caione <carlo@carlocaione.org>
 
 #include <common.h>
+#include <deep-probe.h>
 #include <init.h>
 #include <fs.h>
 #include <of.h>
@@ -45,12 +46,6 @@ struct msg_get_arm_mem {
 	u32 end_tag;
 };
 
-struct msg_get_clock_rate {
-	struct bcm2835_mbox_hdr hdr;
-	struct bcm2835_mbox_tag_get_clock_rate get_clock_rate;
-	u32 end_tag;
-};
-
 struct msg_get_board_rev {
 	struct bcm2835_mbox_hdr hdr;
 	struct bcm2835_mbox_tag_get_board_rev get_board_rev;
@@ -80,22 +75,6 @@ static int rpi_get_arm_mem(u32 *size)
 	return 0;
 }
 
-static struct clk *rpi_register_firmware_clock(u32 clock_id, const char *name)
-{
-	BCM2835_MBOX_STACK_ALIGN(struct msg_get_clock_rate, msg);
-	int ret;
-
-	BCM2835_MBOX_INIT_HDR(msg);
-	BCM2835_MBOX_INIT_TAG(&msg->get_clock_rate, GET_CLOCK_RATE);
-	msg->get_clock_rate.body.req.clock_id = clock_id;
-
-	ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
-	if (ret)
-		return ERR_PTR(ret);
-
-	return clk_fixed(name, msg->get_clock_rate.body.resp.rate_hz);
-}
-
 static void rpi_set_usbethaddr(void)
 {
 	BCM2835_MBOX_STACK_ALIGN(struct msg_get_mac_address, msg);
@@ -343,57 +322,6 @@ static int rpi_postcore_init(void)
 }
 postcore_initcall(rpi_postcore_init);
 
-static int rpi_clock_init(void)
-{
-	struct clk *clk;
-
-	clk = rpi_register_firmware_clock(BCM2835_MBOX_CLOCK_ID_EMMC,
-					 "bcm2835_mci0");
-	if (IS_ERR(clk))
-		return PTR_ERR(clk);
-
-	clkdev_add_physbase(clk, 0x20300000, NULL);
-	clkdev_add_physbase(clk, 0x3f300000, NULL);
-
-	clk = rpi_register_firmware_clock(BCM2835_MBOX_CLOCK_ID_CORE,
-					  "bcm2835_sdhost");
-	if (IS_ERR(clk))
-		return PTR_ERR(clk);
-
-	clkdev_add_physbase(clk, 0x20202000, NULL);
-	clkdev_add_physbase(clk, 0x3f202000, NULL);
-
-	return 0;
-}
-postconsole_initcall(rpi_clock_init);
-
-static int rpi_console_clock_init(void)
-{
-	struct clk *clk;
-
-	clk = clk_fixed("apb_pclk", 0);
-	clk_register_clkdev(clk, "apb_pclk", NULL);
-
-	clk = clk_fixed("uart0-pl0110", 48 * 1000 * 1000);
-	clk_register_clkdev(clk, NULL, "uart0-pl0110");
-	clkdev_add_physbase(clk, BCM2835_PL011_BASE, NULL);
-	clkdev_add_physbase(clk, BCM2836_PL011_BASE, NULL);
-
-	clk = rpi_register_firmware_clock(BCM2835_MBOX_CLOCK_ID_CORE,
-					  "uart1-8250");
-	if (IS_ERR(clk))
-		return PTR_ERR(clk);
-
-	clkdev_add_physbase(clk, BCM2835_MINIUART_BASE, NULL);
-	clkdev_add_physbase(clk, BCM2836_MINIUART_BASE, NULL);
-
-	clk = clk_fixed("bcm2835-cs", 1 * 1000 * 1000);
-	clk_register_clkdev(clk, NULL, "bcm2835-cs");
-
-	return 0;
-}
-postcore_initcall(rpi_console_clock_init);
-
 static int rpi_env_init(void)
 {
 	struct stat s;
@@ -559,6 +487,7 @@ static const struct of_device_id rpi_of_match[] = {
 	{ .compatible = "raspberrypi,3-compute-module-lite" },
 	{ /* sentinel */ },
 };
+BAREBOX_DEEP_PROBE_ENABLE(rpi_of_match);
 
 static struct driver_d rpi_board_driver = {
 	.name = "board-rpi",
diff --git a/drivers/clk/Makefile b/drivers/clk/Makefile
index 499df2fe39..9675d45dc9 100644
--- a/drivers/clk/Makefile
+++ b/drivers/clk/Makefile
@@ -24,3 +24,4 @@ obj-$(CONFIG_ARCH_LAYERSCAPE)	+= clk-qoric.o
 obj-y				+= analogbits/
 obj-$(CONFIG_CLK_SIFIVE)	+= sifive/
 obj-$(CONFIG_SOC_STARFIVE)	+= starfive/
+obj-$(CONFIG_MACH_RPI_COMMON)	+= clk-rpi.o
diff --git a/drivers/clk/clk-rpi.c b/drivers/clk/clk-rpi.c
new file mode 100644
index 0000000000..794d95a591
--- /dev/null
+++ b/drivers/clk/clk-rpi.c
@@ -0,0 +1,93 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include <common.h>
+#include <init.h>
+#include <driver.h>
+#include <linux/clk.h>
+#include <io.h>
+#include <linux/clkdev.h>
+#include <linux/err.h>
+
+#include <mach/core.h>
+#include <mach/mbox.h>
+#include <mach/platform.h>
+
+struct msg_get_clock_rate {
+	struct bcm2835_mbox_hdr hdr;
+	struct bcm2835_mbox_tag_get_clock_rate get_clock_rate;
+	u32 end_tag;
+};
+
+static struct clk *rpi_register_firmware_clock(u32 clock_id, const char *name)
+{
+	BCM2835_MBOX_STACK_ALIGN(struct msg_get_clock_rate, msg);
+	int ret;
+
+	BCM2835_MBOX_INIT_HDR(msg);
+	BCM2835_MBOX_INIT_TAG(&msg->get_clock_rate, GET_CLOCK_RATE);
+	msg->get_clock_rate.body.req.clock_id = clock_id;
+
+	ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
+	if (ret)
+		return ERR_PTR(ret);
+
+	return clk_fixed(name, msg->get_clock_rate.body.resp.rate_hz);
+}
+
+static int bcm2835_cprman_init(struct device_node *np)
+{
+	struct device_node *mbox_node;
+	struct clk *clk;
+	int ret;
+
+	mbox_node = of_find_compatible_node(NULL, NULL, "brcm,bcm2835-mbox");
+	if (!mbox_node) {
+		pr_err("Missing mbox node\n");
+		return -ENOENT;
+	}
+
+	ret = of_device_ensure_probed(mbox_node);
+	if (ret) {
+		pr_err("Can't probe mbox node. %i\n", ret);
+		return ret;
+	}
+
+	clk = rpi_register_firmware_clock(BCM2835_MBOX_CLOCK_ID_EMMC,
+					 "bcm2835_mci0");
+	if (IS_ERR(clk))
+		return PTR_ERR(clk);
+
+	clkdev_add_physbase(clk, 0x20300000, NULL);
+	clkdev_add_physbase(clk, 0x3f300000, NULL);
+
+	clk = rpi_register_firmware_clock(BCM2835_MBOX_CLOCK_ID_CORE,
+					  "bcm2835_sdhost");
+	if (IS_ERR(clk))
+		return PTR_ERR(clk);
+
+	clkdev_add_physbase(clk, 0x20202000, NULL);
+	clkdev_add_physbase(clk, 0x3f202000, NULL);
+
+	clk = clk_fixed("apb_pclk", 0);
+	clk_register_clkdev(clk, "apb_pclk", NULL);
+
+	clk = clk_fixed("uart0-pl0110", 48 * 1000 * 1000);
+	clk_register_clkdev(clk, NULL, "uart0-pl0110");
+	clkdev_add_physbase(clk, BCM2835_PL011_BASE, NULL);
+	clkdev_add_physbase(clk, BCM2836_PL011_BASE, NULL);
+
+	clk = rpi_register_firmware_clock(BCM2835_MBOX_CLOCK_ID_CORE,
+					  "uart1-8250");
+	if (IS_ERR(clk))
+		return PTR_ERR(clk);
+
+	clkdev_add_physbase(clk, BCM2835_MINIUART_BASE, NULL);
+	clkdev_add_physbase(clk, BCM2836_MINIUART_BASE, NULL);
+
+	clk = clk_fixed("bcm2835-cs", 1 * 1000 * 1000);
+	clk_register_clkdev(clk, NULL, "bcm2835-cs");
+
+	return 0;
+}
+/* CLK_OF_DECLARE should be used to make it probed before amba,pl011 */
+CLK_OF_DECLARE(bcm2835_cprman, "brcm,bcm2835-cprman", bcm2835_cprman_init);
-- 
2.30.2


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[PATCH v1 3/4] ARM: rpi: validate devicetree compatible instead of changing model name

[Oleksij Rempel]

To cover all possible RPi variants we need to be able to work with DTs
provided by the 1. stage loader. If we get wrong DT for the barebox,
we will take wrong DT for kernel as well.

Since current device list was used only to update model name without
updating devicetree compatible, this patch will turn it around by using
device list to validate if we use right DT/compatible on the right HW.

Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
---
 arch/arm/boards/raspberry-pi/rpi-common.c | 410 ++++++++++++++--------
 1 file changed, 272 insertions(+), 138 deletions(-)

diff --git a/arch/arm/boards/raspberry-pi/rpi-common.c b/arch/arm/boards/raspberry-pi/rpi-common.c
index 53c476c22a..b6673ca474 100644
--- a/arch/arm/boards/raspberry-pi/rpi-common.c
+++ b/arch/arm/boards/raspberry-pi/rpi-common.c
@@ -6,6 +6,7 @@
 #include <init.h>
 #include <fs.h>
 #include <of.h>
+#include <of_device.h>
 #include <linux/stat.h>
 #include <linux/clk.h>
 #include <linux/clkdev.h>
@@ -29,16 +30,20 @@
 
 #include "lowlevel.h"
 
-struct rpi_model {
-	const char *name;
-	void (*init)(void);
+struct rpi_priv;
+struct rpi_machine_data {
+	unsigned int hw_id;
+#define RPI_OLD_SCHEMA			BIT(0)
+	unsigned int flags;
+	int (*init)(struct rpi_priv *priv);
 };
 
-#define RPI_MODEL(_id, _name, _init)	\
-	[_id] = {				\
-		.name			= _name,\
-		.init			= _init,\
-	}
+struct rpi_priv {
+	struct device_d *dev;
+	const struct rpi_machine_data *dcfg;
+	unsigned int hw_id;
+	const char *name;
+};
 
 struct msg_get_arm_mem {
 	struct bcm2835_mbox_hdr hdr;
@@ -133,98 +138,56 @@ static void rpi_add_led(void)
 		led_set_trigger(LED_TRIGGER_HEARTBEAT, &l->led);
 }
 
-static void rpi_b_init(void)
+static int rpi_b_init(struct rpi_priv *priv)
 {
 	rpi_leds[0].gpio = 16;
 	rpi_leds[0].active_low = 1;
 	rpi_set_usbethaddr();
+
+	return 0;
 }
 
-static void rpi_b_plus_init(void)
+static int rpi_b_plus_init(struct rpi_priv *priv)
 {
 	rpi_leds[0].gpio = 47;
 	rpi_leds[1].gpio = 35;
 	rpi_set_usbethaddr();
+
+	return 0;
 }
 
-static void rpi_0_init(void)
+static int rpi_0_init(struct rpi_priv *priv)
 {
 	rpi_leds[0].gpio = 47;
 	rpi_set_usbotg("usb0");
+
+	return 0;
 }
 
-static void rpi_0_w_init(void)
+static int rpi_0_w_init(struct rpi_priv *priv)
 {
 	struct device_node *np;
 	int ret;
 
-	rpi_0_init();
+	rpi_0_init(priv);
 
 	np = of_find_node_by_path("/chosen");
 	if (!np)
-		return;
+		return -ENODEV;
 
 	if (!of_device_enable_and_register_by_alias("serial1"))
-		return;
+		return -ENODEV;
 
 	ret = of_property_write_string(np, "stdout-path", "serial1:115200n8");
 	if (ret)
-		return;
+		return ret;
 
-	of_device_disable_by_alias("serial0");
+	return of_device_disable_by_alias("serial0");
 }
 
-/* See comments in mbox.h for data source */
-static const struct rpi_model rpi_models_old_scheme[] = {
-	RPI_MODEL(0, "Unknown model", NULL),
-	RPI_MODEL(BCM2835_BOARD_REV_B_I2C0_2, "Model B (no P5)", rpi_b_init),
-	RPI_MODEL(BCM2835_BOARD_REV_B_I2C0_3, "Model B (no P5)", rpi_b_init),
-	RPI_MODEL(BCM2835_BOARD_REV_B_I2C1_4, "Model B", rpi_b_init),
-	RPI_MODEL(BCM2835_BOARD_REV_B_I2C1_5, "Model B", rpi_b_init),
-	RPI_MODEL(BCM2835_BOARD_REV_B_I2C1_6, "Model B", rpi_b_init),
-	RPI_MODEL(BCM2835_BOARD_REV_A_7, "Model A", NULL),
-	RPI_MODEL(BCM2835_BOARD_REV_A_8, "Model A", NULL),
-	RPI_MODEL(BCM2835_BOARD_REV_A_9, "Model A", NULL),
-	RPI_MODEL(BCM2835_BOARD_REV_B_REV2_d, "Model B rev2", rpi_b_init),
-	RPI_MODEL(BCM2835_BOARD_REV_B_REV2_e, "Model B rev2", rpi_b_init),
-	RPI_MODEL(BCM2835_BOARD_REV_B_REV2_f, "Model B rev2", rpi_b_init),
-	RPI_MODEL(BCM2835_BOARD_REV_B_PLUS_10, "Model B+", rpi_b_plus_init),
-	RPI_MODEL(BCM2835_BOARD_REV_CM_11, "Compute Module", NULL),
-	RPI_MODEL(BCM2835_BOARD_REV_A_PLUS_12, "Model A+", NULL),
-	RPI_MODEL(BCM2835_BOARD_REV_B_PLUS_13, "Model B+", rpi_b_plus_init),
-	RPI_MODEL(BCM2835_BOARD_REV_CM_14, "Compute Module", NULL),
-	RPI_MODEL(BCM2835_BOARD_REV_A_PLUS_15, "Model A+", NULL),
-};
-
-static const struct rpi_model rpi_models_new_scheme[] = {
-	RPI_MODEL(BCM2835_BOARD_REV_A, 		"Model A",	NULL ),
-	RPI_MODEL(BCM2835_BOARD_REV_B, 		"Model B", 	rpi_b_init ),
-	RPI_MODEL(BCM2835_BOARD_REV_A_PLUS, 	"Model A+", 	NULL ),
-	RPI_MODEL(BCM2835_BOARD_REV_B_PLUS, 	"Model B+", 	rpi_b_plus_init ),
-	RPI_MODEL(BCM2836_BOARD_REV_2_B, 	"Model 2B", 	rpi_b_plus_init),
-	RPI_MODEL(BCM283x_BOARD_REV_Alpha, 	"Alpha", 	NULL),
-	RPI_MODEL(BCM2835_BOARD_REV_CM1, 	"Compute Module", NULL ),
-	RPI_MODEL(0x7, "Unknown model", NULL),
-	RPI_MODEL(BCM2837_BOARD_REV_3_B, 	"Model 3B", 	rpi_b_init ),
-	RPI_MODEL(BCM2835_BOARD_REV_ZERO, 	"Zero", 	rpi_0_init),
-	RPI_MODEL(BCM2837_BOARD_REV_CM3, 	"Compute Module 3", NULL ),
-	RPI_MODEL(0xb, "Unknown model", NULL),
-	RPI_MODEL(BCM2835_BOARD_REV_ZERO_W, 	"Zero W", 	rpi_0_w_init),
-	RPI_MODEL(BCM2837B0_BOARD_REV_3B_PLUS, 	"Model 3B+", 	rpi_b_plus_init ),
-	RPI_MODEL(BCM2837B0_BOARD_REV_3A_PLUS, 	"Model 3A+", 	rpi_b_plus_init),
-	RPI_MODEL(0xf, "Unknown model", NULL),
-	RPI_MODEL(BCM2837B0_BOARD_REV_CM3_PLUS, "Compute Module 3+", NULL),
-};
-
-static int rpi_board_rev = 0;
-static const struct rpi_model *model = NULL;
-
-static void rpi_get_board_rev(void)
+static int rpi_get_board_rev(struct rpi_priv *priv)
 {
 	int ret;
-	char *name;
-	const struct rpi_model *rpi_models;
-	size_t rpi_models_size;
 
 	BCM2835_MBOX_STACK_ALIGN(struct msg_get_board_rev, msg);
 	BCM2835_MBOX_INIT_HDR(msg);
@@ -232,9 +195,8 @@ static void rpi_get_board_rev(void)
 
 	ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
 	if (ret) {
-		printf("bcm2835: Could not query board revision\n");
-		/* Ignore error; not critical */
-		return;
+		dev_err(priv->dev, "Could not query board revision\n");
+		return ret;
 	}
 
 	/* Comments from u-boot:
@@ -248,53 +210,9 @@ static void rpi_get_board_rev(void)
 	 * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=98367&start=250
 	 * http://www.raspberrypi.org/forums/viewtopic.php?f=31&t=20594
 	 */
-	rpi_board_rev = msg->get_board_rev.body.resp.rev;
-	if (rpi_board_rev & 0x800000) {
-		rpi_board_rev = (rpi_board_rev >> 4) & 0xff;
-		rpi_models = rpi_models_new_scheme;
-		rpi_models_size = ARRAY_SIZE(rpi_models_new_scheme);
-
-	} else {
-		rpi_board_rev &= 0xff;
-		rpi_models = rpi_models_old_scheme;
-		rpi_models_size = ARRAY_SIZE(rpi_models_old_scheme);
-	}
-
-	if (rpi_board_rev >= rpi_models_size) {
-		printf("RPI: Board rev %u outside known range\n",
-		       rpi_board_rev);
-		goto unknown_rev;
-	}
-
-	if (!rpi_models[rpi_board_rev].name) {
-		printf("RPI: Board rev %u unknown\n", rpi_board_rev);
-		goto unknown_rev;
-	}
-
-	if (!rpi_board_rev)
-		goto unknown_rev;
-
-	model = &rpi_models[rpi_board_rev];
-	name = basprintf("RaspberryPi %s", model->name);
-	barebox_set_model(name);
-	free(name);
+	priv->hw_id = msg->get_board_rev.body.resp.rev;
 
-	return;
-
-unknown_rev:
-	rpi_board_rev = 0;
-	barebox_set_model("RaspberryPi (unknown rev)");
-}
-
-static void rpi_model_init(void)
-{
-	if (!model)
-		return;
-
-	if (!model->init)
-		return;
-
-	model->init();
+	return 0;
 }
 
 static int rpi_mem_init(void)
@@ -312,16 +230,6 @@ static int rpi_mem_init(void)
 }
 mem_initcall(rpi_mem_init);
 
-static int rpi_postcore_init(void)
-{
-	rpi_get_board_rev();
-	barebox_set_hostname("rpi");
-	rpi_model_init();
-
-	return 0;
-}
-postcore_initcall(rpi_postcore_init);
-
 static int rpi_env_init(void)
 {
 	struct stat s;
@@ -439,9 +347,65 @@ static void rpi_vc_fdt(void)
 	}
 }
 
+static int rpi_get_dcfg(struct rpi_priv *priv)
+{
+	const struct rpi_machine_data *dcfg;
+	int ret;
+
+	dcfg = of_device_get_match_data(priv->dev);
+	if (!dcfg) {
+		ret = -EINVAL;
+		goto exit_get_dcfg;
+	}
+
+	for (; dcfg->hw_id != UINT_MAX; dcfg++) {
+		if (priv->hw_id & 0x800000) {
+			if (dcfg->hw_id != ((priv->hw_id >> 4) & 0xff))
+				continue;
+		} else {
+			if (!(dcfg->flags & RPI_OLD_SCHEMA))
+				continue;
+			if (dcfg->hw_id != (priv->hw_id & 0xff))
+				continue;
+		}
+
+		priv->dcfg = dcfg;
+		break;
+	}
+
+	if (!priv->dcfg) {
+		ret = -ENODEV;
+		goto exit_get_dcfg;
+	}
+
+	return 0;
+exit_get_dcfg:
+	dev_err(priv->dev, "Failed to get dcfg for board_id: 0x%x: %pe\n",
+		priv->hw_id, ERR_PTR(ret));
+	return ret;
+}
+
 static int rpi_devices_probe(struct device_d *dev)
 {
 	struct regulator *reg;
+	struct rpi_priv *priv;
+	int ret;
+
+	priv = xzalloc(sizeof(*priv));
+	if (!priv)
+		return -ENOMEM;
+
+	priv->dev = dev;
+
+	ret = rpi_get_board_rev(priv);
+	if (ret)
+		goto free_priv;
+
+	ret = rpi_get_dcfg(priv);
+	if (ret)
+		goto free_priv;
+
+	barebox_set_hostname("rpi");
 
 	rpi_add_led();
 	bcm2835_register_fb();
@@ -449,6 +413,9 @@ static int rpi_devices_probe(struct device_d *dev)
 	rpi_env_init();
 	rpi_vc_fdt();
 
+	if (priv->dcfg->init)
+		priv->dcfg->init(priv);
+
 	reg = regulator_get_name("bcm2835_usb");
 	if (IS_ERR(reg))
 		return PTR_ERR(reg);
@@ -456,8 +423,175 @@ static int rpi_devices_probe(struct device_d *dev)
 	regulator_enable(reg);
 
 	return 0;
+
+free_priv:
+	kfree(priv);
+	return ret;
 }
 
+static const struct rpi_machine_data rpi_model_a[] = {
+	{
+		.hw_id = BCM2835_BOARD_REV_A_7,
+		.flags = RPI_OLD_SCHEMA,
+	}, {
+		.hw_id = BCM2835_BOARD_REV_A_8,
+		.flags = RPI_OLD_SCHEMA,
+	}, {
+		.hw_id = BCM2835_BOARD_REV_A_9,
+		.flags = RPI_OLD_SCHEMA,
+	}, {
+		.hw_id = BCM2835_BOARD_REV_A,
+	}, {
+		.hw_id = UINT_MAX
+	},
+};
+
+static const struct rpi_machine_data rpi_model_a_plus[] = {
+	{
+		.hw_id = BCM2835_BOARD_REV_A_PLUS_12,
+		.flags = RPI_OLD_SCHEMA,
+	}, {
+		.hw_id = BCM2835_BOARD_REV_A_PLUS_15,
+		.flags = RPI_OLD_SCHEMA,
+	}, {
+		.hw_id = BCM2835_BOARD_REV_A_PLUS,
+	}, {
+		.hw_id = UINT_MAX
+	},
+};
+
+static const struct rpi_machine_data rpi_model_b[] = {
+	{
+		.hw_id = BCM2835_BOARD_REV_B_I2C1_4,
+		.flags = RPI_OLD_SCHEMA,
+	}, {
+		.hw_id = BCM2835_BOARD_REV_B_I2C1_5,
+		.flags = RPI_OLD_SCHEMA,
+	}, {
+		.hw_id = BCM2835_BOARD_REV_B_I2C1_6,
+		.flags = RPI_OLD_SCHEMA,
+	}, {
+		.hw_id = BCM2835_BOARD_REV_B,
+	}, {
+		.hw_id = UINT_MAX
+	},
+};
+
+static const struct rpi_machine_data rpi_model_b_i2c0[] = {
+	{
+		.hw_id = BCM2835_BOARD_REV_B_I2C0_2,
+		.flags = RPI_OLD_SCHEMA,
+	}, {
+		.hw_id = BCM2835_BOARD_REV_B_I2C0_3,
+		.flags = RPI_OLD_SCHEMA,
+	}, {
+		.hw_id = UINT_MAX
+	},
+};
+
+static const struct rpi_machine_data rpi_model_b_rev2[] = {
+	{
+		.hw_id = BCM2835_BOARD_REV_B_REV2_d,
+		.flags = RPI_OLD_SCHEMA,
+		.init = rpi_b_init,
+	}, {
+		.hw_id = BCM2835_BOARD_REV_B_REV2_e,
+		.flags = RPI_OLD_SCHEMA,
+		.init = rpi_b_init,
+	}, {
+		.hw_id = BCM2835_BOARD_REV_B_REV2_f,
+		.flags = RPI_OLD_SCHEMA,
+		.init = rpi_b_init,
+	}, {
+		.hw_id = UINT_MAX
+	},
+};
+
+static const struct rpi_machine_data rpi_model_b_plus[] = {
+	{
+		.hw_id = BCM2835_BOARD_REV_B_PLUS_10,
+		.flags = RPI_OLD_SCHEMA,
+		.init = rpi_b_plus_init,
+	}, {
+		.hw_id = BCM2835_BOARD_REV_B_PLUS_13,
+		.flags = RPI_OLD_SCHEMA,
+		.init = rpi_b_plus_init,
+	}, {
+		.hw_id = BCM2835_BOARD_REV_B_PLUS,
+		.init = rpi_b_plus_init,
+	}, {
+		.hw_id = UINT_MAX
+	},
+};
+
+static const struct rpi_machine_data rpi_compute_module[] = {
+	{
+		.hw_id = BCM2835_BOARD_REV_CM_11,
+		.flags = RPI_OLD_SCHEMA,
+	}, {
+		.hw_id = BCM2835_BOARD_REV_CM_14,
+		.flags = RPI_OLD_SCHEMA,
+	}, {
+		.hw_id = BCM2835_BOARD_REV_CM1,
+	}, {
+		.hw_id = UINT_MAX
+	},
+};
+
+static const struct rpi_machine_data rpi_model_zero[] = {
+	{
+		.hw_id = BCM2835_BOARD_REV_ZERO,
+		.init = rpi_0_init,
+	}, {
+		.hw_id = UINT_MAX
+	},
+};
+
+static const struct rpi_machine_data rpi_model_zero_w[] = {
+	{
+		.hw_id = BCM2835_BOARD_REV_ZERO_W,
+		.init = rpi_0_w_init,
+	}, {
+		.hw_id = UINT_MAX
+	},
+};
+
+static const struct rpi_machine_data rpi_2_model_b[] = {
+	{
+		.hw_id = BCM2836_BOARD_REV_2_B,
+		.init = rpi_b_plus_init,
+	}, {
+		.hw_id = UINT_MAX
+	},
+};
+
+static const struct rpi_machine_data rpi_3_model_a_plus[] = {
+	{
+		.hw_id = BCM2837B0_BOARD_REV_3A_PLUS,
+		.init = rpi_b_plus_init,
+	}, {
+		.hw_id = UINT_MAX
+	},
+};
+
+static const struct rpi_machine_data rpi_3_model_b[] = {
+	{
+		.hw_id = BCM2837_BOARD_REV_3_B,
+		.init = rpi_b_init,
+	}, {
+		.hw_id = UINT_MAX
+	},
+};
+
+static const struct rpi_machine_data rpi_3_model_b_plus[] = {
+	{
+		.hw_id = BCM2837B0_BOARD_REV_3B_PLUS,
+		.init = rpi_b_plus_init,
+	}, {
+		.hw_id = UINT_MAX
+	},
+};
+
 static const struct of_device_id rpi_of_match[] = {
 	/* BCM2711 based Boards */
 	{ .compatible = "raspberrypi,400" },
@@ -465,24 +599,24 @@ static const struct of_device_id rpi_of_match[] = {
 	{ .compatible = "raspberrypi,4-model-b" },
 
 	/* BCM2835 based Boards */
-	{ .compatible = "raspberrypi,model-a" },
-	{ .compatible = "raspberrypi,model-a-plus" },
-	{ .compatible = "raspberrypi,model-b" },
+	{ .compatible = "raspberrypi,model-a", .data = rpi_model_a },
+	{ .compatible = "raspberrypi,model-a-plus", .data = rpi_model_a_plus },
+	{ .compatible = "raspberrypi,model-b", .data = rpi_model_b },
 	/* Raspberry Pi Model B (no P5) */
-	{ .compatible = "raspberrypi,model-b-i2c0" },
-	{ .compatible = "raspberrypi,model-b-rev2" },
-	{ .compatible = "raspberrypi,model-b-plus" },
-	{ .compatible = "raspberrypi,compute-module" },
-	{ .compatible = "raspberrypi,model-zero" },
-	{ .compatible = "raspberrypi,model-zero-w" },
+	{ .compatible = "raspberrypi,model-b-i2c0", .data = rpi_model_b_i2c0 },
+	{ .compatible = "raspberrypi,model-b-rev2", .data = rpi_model_b_rev2 },
+	{ .compatible = "raspberrypi,model-b-plus", .data = rpi_model_b_plus },
+	{ .compatible = "raspberrypi,compute-module", .data = rpi_compute_module },
+	{ .compatible = "raspberrypi,model-zero", .data = rpi_model_zero },
+	{ .compatible = "raspberrypi,model-zero-w", .data = rpi_model_zero_w },
 
 	/* BCM2836 based Boards */
-	{ .compatible = "raspberrypi,2-model-b" },
+	{ .compatible = "raspberrypi,2-model-b", .data = rpi_2_model_b },
 
 	/* BCM2837 based Boards */
-	{ .compatible = "raspberrypi,3-model-a-plus" },
-	{ .compatible = "raspberrypi,3-model-b" },
-	{ .compatible = "raspberrypi,3-model-b-plus" },
+	{ .compatible = "raspberrypi,3-model-a-plus", .data = rpi_3_model_a_plus },
+	{ .compatible = "raspberrypi,3-model-b", .data = rpi_3_model_b },
+	{ .compatible = "raspberrypi,3-model-b-plus", .data = rpi_3_model_b_plus },
 	{ .compatible = "raspberrypi,3-compute-module" },
 	{ .compatible = "raspberrypi,3-compute-module-lite" },
 	{ /* sentinel */ },
-- 
2.30.2


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[PATCH v1 4/4] ARM: rpi: set host name based on DT compatible

[Oleksij Rempel]

The "rpi" host name is not practical if you need to work with different
variants of RPi at same time. Usually, removing barebox_set_hostname()
would let barebox generate it automatically. But in this case, the name
would look less informative. For example "2-model-b".

So, make board code generate something usable, for example
"rpi-2-model-b"

Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
---
 arch/arm/boards/raspberry-pi/rpi-common.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/arch/arm/boards/raspberry-pi/rpi-common.c b/arch/arm/boards/raspberry-pi/rpi-common.c
index b6673ca474..9d8a253c41 100644
--- a/arch/arm/boards/raspberry-pi/rpi-common.c
+++ b/arch/arm/boards/raspberry-pi/rpi-common.c
@@ -389,6 +389,8 @@ static int rpi_devices_probe(struct device_d *dev)
 {
 	struct regulator *reg;
 	struct rpi_priv *priv;
+	const char *name, *ptr;
+	char *hostname;
 	int ret;
 
 	priv = xzalloc(sizeof(*priv));
@@ -405,7 +407,12 @@ static int rpi_devices_probe(struct device_d *dev)
 	if (ret)
 		goto free_priv;
 
-	barebox_set_hostname("rpi");
+	/* construct short recognizable host name */
+	name = of_device_get_match_compatible(priv->dev);
+	ptr = strchr(name, ',');
+	hostname = basprintf("rpi-%s", ptr ? ptr + 1 : name);
+	barebox_set_hostname(hostname);
+	free(hostname);
 
 	rpi_add_led();
 	bcm2835_register_fb();
-- 
2.30.2


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Re: [PATCH v1 3/4] ARM: rpi: validate devicetree compatible instead of changing model name

[Trent Piepho]

On Mon, Jan 17, 2022 at 4:06 AM Oleksij Rempel <o.rempel@pengutronix.de> wrote:
> +struct rpi_priv;
> +struct rpi_machine_data {
> +       unsigned int hw_id;
> +#define RPI_OLD_SCHEMA                 BIT(0)
> +       unsigned int flags;

hw_id is only a byte.  Both of these fields could be u8, which would
make the struct smaller.

> +struct rpi_priv {
> +       struct device_d *dev;
> +       const struct rpi_machine_data *dcfg;

Doesn't seem like there is any need to have dcfg saved in this struct.
It looks like it's used just once, in the same function that finds the
value.  rpi_get_dcfg() could return the value directly, rather than
indirectly by writing it into a field of a struct passed as an
argument.

>
> +static int rpi_get_dcfg(struct rpi_priv *priv)
> +{
> +       const struct rpi_machine_data *dcfg;
> +       int ret;
> +
> +       dcfg = of_device_get_match_data(priv->dev);
> +       if (!dcfg) {
> +               ret = -EINVAL;
> +               goto exit_get_dcfg;
> +       }

Then later:
> +       ret = rpi_get_dcfg(priv);
> +       if (ret)
> +               goto free_priv;

It looks like any board that doesn't have match data will be rejected
and fail to init.  But then what about these boards:

>  static const struct of_device_id rpi_of_match[] = {
>         /* BCM2711 based Boards */
>         { .compatible = "raspberrypi,400" },
> @@ -465,24 +599,24 @@ static const struct of_device_id rpi_of_match[] = {
>         { .compatible = "raspberrypi,4-model-b" },

Looks like they'll get rejected since they have no match data.

> +
> +       for (; dcfg->hw_id != UINT_MAX; dcfg++) {
> +               if (priv->hw_id & 0x800000) {
> +                       if (dcfg->hw_id != ((priv->hw_id >> 4) & 0xff))
> +                               continue;
> +               } else {
> +                       if (!(dcfg->flags & RPI_OLD_SCHEMA))
> +                               continue;
> +                       if (dcfg->hw_id != (priv->hw_id & 0xff))
> +                               continue;
> +               }
> +
> +               priv->dcfg = dcfg;
> +               break;

Could just return 0 here instead of break.  Or better, "return dcfg",
as there's no reason not to just return the value like a normal
function.

> +       }
> +
> +       if (!priv->dcfg) {
> +               ret = -ENODEV;
> +               goto exit_get_dcfg;
> +       }

Then this can become ret = -ENODEV and the if and goto go away.

> +
> +       priv = xzalloc(sizeof(*priv));
> +       if (!priv)
> +               return -ENOMEM;

No need to check the return value of "x" alloc functions.  That's the
whole point of the x version.

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Re: [PATCH v1 2/4] ARM: rpi: move clk support to a separate driver and enable deep-probe

[Sascha Hauer]

On Mon, Jan 17, 2022 at 01:04:58PM +0100, Oleksij Rempel wrote:
> To make deep-probe work properly, we need clock support be registered as
> driver to related device.
> 
> To avoid regression, deep-probe is enabled in the same patch.
> 
> Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
> ---
>  arch/arm/boards/raspberry-pi/rpi-common.c | 75 +-----------------
>  drivers/clk/Makefile                      |  1 +
>  drivers/clk/clk-rpi.c                     | 93 +++++++++++++++++++++++
>  3 files changed, 96 insertions(+), 73 deletions(-)
>  create mode 100644 drivers/clk/clk-rpi.c
> 
> +static int bcm2835_cprman_init(struct device_node *np)
> +{
> +	struct device_node *mbox_node;
> +	struct clk *clk;
> +	int ret;
> +
> +	mbox_node = of_find_compatible_node(NULL, NULL, "brcm,bcm2835-mbox");
> +	if (!mbox_node) {
> +		pr_err("Missing mbox node\n");
> +		return -ENOENT;
> +	}
> +
> +	ret = of_device_ensure_probed(mbox_node);
> +	if (ret) {
> +		pr_err("Can't probe mbox node. %i\n", ret);
> +		return ret;
> +	}
> +
> +	clk = rpi_register_firmware_clock(BCM2835_MBOX_CLOCK_ID_EMMC,
> +					 "bcm2835_mci0");
> +	if (IS_ERR(clk))
> +		return PTR_ERR(clk);
> +
> +	clkdev_add_physbase(clk, 0x20300000, NULL);
> +	clkdev_add_physbase(clk, 0x3f300000, NULL);
> +
> +	clk = rpi_register_firmware_clock(BCM2835_MBOX_CLOCK_ID_CORE,
> +					  "bcm2835_sdhost");
> +	if (IS_ERR(clk))
> +		return PTR_ERR(clk);
> +
> +	clkdev_add_physbase(clk, 0x20202000, NULL);
> +	clkdev_add_physbase(clk, 0x3f202000, NULL);
> +
> +	clk = clk_fixed("apb_pclk", 0);
> +	clk_register_clkdev(clk, "apb_pclk", NULL);
> +
> +	clk = clk_fixed("uart0-pl0110", 48 * 1000 * 1000);
> +	clk_register_clkdev(clk, NULL, "uart0-pl0110");
> +	clkdev_add_physbase(clk, BCM2835_PL011_BASE, NULL);
> +	clkdev_add_physbase(clk, BCM2836_PL011_BASE, NULL);
> +
> +	clk = rpi_register_firmware_clock(BCM2835_MBOX_CLOCK_ID_CORE,
> +					  "uart1-8250");
> +	if (IS_ERR(clk))
> +		return PTR_ERR(clk);
> +
> +	clkdev_add_physbase(clk, BCM2835_MINIUART_BASE, NULL);
> +	clkdev_add_physbase(clk, BCM2836_MINIUART_BASE, NULL);
> +
> +	clk = clk_fixed("bcm2835-cs", 1 * 1000 * 1000);
> +	clk_register_clkdev(clk, NULL, "bcm2835-cs");
> +
> +	return 0;
> +}
> +/* CLK_OF_DECLARE should be used to make it probed before amba,pl011 */

We should finally switch to device tree based lookup for the clocks.
Given where we are already this seems to be only a small step left to
go.

Sascha

> +CLK_OF_DECLARE(bcm2835_cprman, "brcm,bcm2835-cprman", bcm2835_cprman_init);
> -- 
> 2.30.2
> 
> 
> _______________________________________________
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> 

-- 
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Steuerwalder Str. 21                       | http://www.pengutronix.de/  |
31137 Hildesheim, Germany                  | Phone: +49-5121-206917-0    |
Amtsgericht Hildesheim, HRA 2686           | Fax:   +49-5121-206917-5555 |

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