stm32mp1: update device tree and gpio functions

Change fdt_check_status function to fdt_get_status.
Update GPIO defines.
Move some functions in gpio driver, instead of dt helper file.
Add GPIO bank helper functions.
Use only one status field in dt_node_info structure including both status
and secure status.

Change-Id: I34f93408dd4aac16ae722f564bc3f7d6ae978cf4
Signed-off-by: Yann Gautier <yann.gautier@st.com>
Signed-off-by: Etienne Carriere <etienne.carriere@st.com>
Signed-off-by: Lionel Debieve <lionel.debieve@st.com>
Signed-off-by: Nicolas Le Bayon <nicolas.le.bayon@st.com>

drivers/st/clk/stm32mp1_clkfunc.c

@@ -31,6 +31,14 @@ const char *stm32mp_osc_node_label[NB_OSC] = {
 	[_USB_PHY_48] = "ck_usbo_48m"
 };
 
+/*******************************************************************************
+ * This function returns the RCC node in the device tree.
+ ******************************************************************************/
+static int fdt_get_rcc_node(void *fdt)
+{
+	return fdt_node_offset_by_compatible(fdt, -1, DT_RCC_CLK_COMPAT);
+}
+
 /*******************************************************************************
  * This function reads the frequency of an oscillator from its name.
  * It reads the value indicated inside the device tree.
@@ -240,7 +248,7 @@ int fdt_rcc_read_uint32_array(const char *prop_name,
 /*******************************************************************************
  * This function gets the subnode offset in rcc-clk section from its name.
  * It reads the values indicated inside the device tree.
- * Returns offset if success, and a negative value else.
+ * Returns offset on success, and a negative FDT/ERRNO error code on failure.
  ******************************************************************************/
 int fdt_rcc_subnode_offset(const char *name)
 {
@@ -251,7 +259,7 @@ int fdt_rcc_subnode_offset(const char *name)
 		return -ENOENT;
 	}
 
-	node = fdt_node_offset_by_compatible(fdt, -1, DT_RCC_CLK_COMPAT);
+	node = fdt_get_rcc_node(fdt);
 	if (node < 0) {
 		return -FDT_ERR_NOTFOUND;
 	}
@@ -280,7 +288,7 @@ const fdt32_t *fdt_rcc_read_prop(const char *prop_name, int *lenp)
 		return NULL;
 	}
 
-	node = fdt_node_offset_by_compatible(fdt, -1, DT_RCC_CLK_COMPAT);
+	node = fdt_get_rcc_node(fdt);
 	if (node < 0) {
 		return NULL;
 	}
@@ -297,7 +305,7 @@ const fdt32_t *fdt_rcc_read_prop(const char *prop_name, int *lenp)
 /*******************************************************************************
  * This function gets the secure status for rcc node.
  * It reads secure-status in device tree.
- * Returns 1 if rcc is available from secure world, 0 else.
+ * Returns true if rcc is available from secure world, false if not.
  ******************************************************************************/
 bool fdt_get_rcc_secure_status(void)
 {
@@ -308,18 +316,18 @@ bool fdt_get_rcc_secure_status(void)
 		return false;
 	}
 
-	node = fdt_node_offset_by_compatible(fdt, -1, DT_RCC_COMPAT);
+	node = fdt_get_rcc_node(fdt);
 	if (node < 0) {
 		return false;
 	}
 
-	return fdt_check_secure_status(node);
+	return (fdt_get_status(node) & DT_SECURE) != 0U;
 }
 
 /*******************************************************************************
  * This function reads the stgen base address.
  * It reads the value indicated inside the device tree.
- * Returns address if success, and NULL value else.
+ * Returns address on success, and NULL value on failure.
  ******************************************************************************/
 uintptr_t fdt_get_stgen_base(void)
 {
@@ -347,7 +355,7 @@ uintptr_t fdt_get_stgen_base(void)
 /*******************************************************************************
  * This function gets the clock ID of the given node.
  * It reads the value indicated inside the device tree.
- * Returns ID if success, and a negative value else.
+ * Returns ID on success, and a negative FDT/ERRNO error code on failure.
  ******************************************************************************/
 int fdt_get_clock_id(int node)
 {

drivers/st/gpio/stm32_gpio.c

@@ -4,44 +4,212 @@
  * SPDX-License-Identifier: BSD-3-Clause
  */
 
+#include <assert.h>
+#include <errno.h>
 #include <stdbool.h>
 
+#include <libfdt.h>
+
+#include <platform_def.h>
+
 #include <common/bl_common.h>
 #include <common/debug.h>
 #include <drivers/st/stm32_gpio.h>
+#include <drivers/st/stm32mp1_clk.h>
+#include <drivers/st/stm32mp1_clkfunc.h>
 #include <lib/mmio.h>
+#include <lib/utils_def.h>
 
-static bool check_gpio(uint32_t bank, uint32_t pin)
+#define DT_GPIO_BANK_SHIFT	12
+#define DT_GPIO_BANK_MASK	GENMASK(16, 12)
+#define DT_GPIO_PIN_SHIFT	8
+#define DT_GPIO_PIN_MASK	GENMASK(11, 8)
+#define DT_GPIO_MODE_MASK	GENMASK(7, 0)
+
+/*******************************************************************************
+ * This function gets GPIO bank node in DT.
+ * Returns node offset if status is okay in DT, else return 0
+ ******************************************************************************/
+static int ckeck_gpio_bank(void *fdt, uint32_t bank, int pinctrl_node)
 {
-	if (pin > GPIO_PIN_MAX) {
-		ERROR("%s: wrong pin number (%d)\n", __func__, pin);
-		return false;
-	}
+	int pinctrl_subnode;
+	uint32_t bank_offset = stm32_get_gpio_bank_offset(bank);
 
-	if ((bank > GPIO_BANK_K) && (bank != GPIO_BANK_Z)) {
-		ERROR("%s: wrong GPIO bank number (%d)\n", __func__, bank);
-		return false;
+	fdt_for_each_subnode(pinctrl_subnode, fdt, pinctrl_node) {
+		const fdt32_t *cuint;
+
+		if (fdt_getprop(fdt, pinctrl_subnode,
+				"gpio-controller", NULL) == NULL) {
+			continue;
+		}
+
+		cuint = fdt_getprop(fdt, pinctrl_subnode, "reg", NULL);
+		if (cuint == NULL) {
+			continue;
+		}
+
+		if ((fdt32_to_cpu(*cuint) == bank_offset) &&
+		    (fdt_get_status(pinctrl_subnode) != DT_DISABLED)) {
+			return pinctrl_subnode;
+		}
 	}
 
-	return true;
+	return 0;
 }
 
-void set_gpio(uint32_t bank, uint32_t pin, uint32_t mode, uint32_t speed,
-	      uint32_t pull, uint32_t alternate)
+/*******************************************************************************
+ * This function gets the pin settings from DT information.
+ * When analyze and parsing is done, set the GPIO registers.
+ * Returns 0 on success and a negative FDT error code on failure.
+ ******************************************************************************/
+static int dt_set_gpio_config(void *fdt, int node, uint8_t status)
 {
-	uintptr_t base;
+	const fdt32_t *cuint, *slewrate;
+	int len;
+	int pinctrl_node;
+	uint32_t i;
+	uint32_t speed = GPIO_SPEED_LOW;
+	uint32_t pull = GPIO_NO_PULL;
 
-	if (!check_gpio(bank, pin)) {
-		return;
+	cuint = fdt_getprop(fdt, node, "pinmux", &len);
+	if (cuint == NULL) {
+		return -FDT_ERR_NOTFOUND;
 	}
 
-	if (bank == GPIO_BANK_Z) {
-		base = STM32_GPIOZ_BANK;
+	pinctrl_node = fdt_parent_offset(fdt, fdt_parent_offset(fdt, node));
+	if (pinctrl_node < 0) {
+		return -FDT_ERR_NOTFOUND;
+	}
+
+	slewrate = fdt_getprop(fdt, node, "slew-rate", NULL);
+	if (slewrate != NULL) {
+		speed = fdt32_to_cpu(*slewrate);
+	}
+
+	if (fdt_getprop(fdt, node, "bias-pull-up", NULL) != NULL) {
+		pull = GPIO_PULL_UP;
+	} else if (fdt_getprop(fdt, node, "bias-pull-down", NULL) != NULL) {
+		pull = GPIO_PULL_DOWN;
 	} else {
-		base = STM32_GPIOA_BANK +
-			(bank * STM32_GPIO_BANK_OFFSET);
+		VERBOSE("No bias configured in node %d\n", node);
 	}
 
+	for (i = 0U; i < ((uint32_t)len / sizeof(uint32_t)); i++) {
+		uint32_t pincfg;
+		uint32_t bank;
+		uint32_t pin;
+		uint32_t mode;
+		uint32_t alternate = GPIO_ALTERNATE_(0);
+		int bank_node;
+		int clk;
+
+		pincfg = fdt32_to_cpu(*cuint);
+		cuint++;
+
+		bank = (pincfg & DT_GPIO_BANK_MASK) >> DT_GPIO_BANK_SHIFT;
+
+		pin = (pincfg & DT_GPIO_PIN_MASK) >> DT_GPIO_PIN_SHIFT;
+
+		mode = pincfg & DT_GPIO_MODE_MASK;
+
+		switch (mode) {
+		case 0:
+			mode = GPIO_MODE_INPUT;
+			break;
+		case 1 ... 16:
+			alternate = mode - 1U;
+			mode = GPIO_MODE_ALTERNATE;
+			break;
+		case 17:
+			mode = GPIO_MODE_ANALOG;
+			break;
+		default:
+			mode = GPIO_MODE_OUTPUT;
+			break;
+		}
+
+		if (fdt_getprop(fdt, node, "drive-open-drain", NULL) != NULL) {
+			mode |= GPIO_OPEN_DRAIN;
+		}
+
+		bank_node = ckeck_gpio_bank(fdt, bank, pinctrl_node);
+		if (bank_node == 0) {
+			ERROR("PINCTRL inconsistent in DT\n");
+			panic();
+		}
+
+		clk = fdt_get_clock_id(bank_node);
+		if (clk < 0) {
+			return -FDT_ERR_NOTFOUND;
+		}
+
+		/* Platform knows the clock: assert it is okay */
+		assert((unsigned long)clk == stm32_get_gpio_bank_clock(bank));
+
+		set_gpio(bank, pin, mode, speed, pull, alternate, status);
+	}
+
+	return 0;
+}
+
+/*******************************************************************************
+ * This function gets the pin settings from DT information.
+ * When analyze and parsing is done, set the GPIO registers.
+ * Returns 0 on success and a negative FDT/ERRNO error code on failure.
+ ******************************************************************************/
+int dt_set_pinctrl_config(int node)
+{
+	const fdt32_t *cuint;
+	int lenp = 0;
+	uint32_t i;
+	uint8_t status = fdt_get_status(node);
+	void *fdt;
+
+	if (fdt_get_address(&fdt) == 0) {
+		return -ENOENT;
+	}
+
+	if (status == DT_DISABLED) {
+		return -FDT_ERR_NOTFOUND;
+	}
+
+	cuint = fdt_getprop(fdt, node, "pinctrl-0", &lenp);
+	if (cuint == NULL) {
+		return -FDT_ERR_NOTFOUND;
+	}
+
+	for (i = 0; i < ((uint32_t)lenp / 4U); i++) {
+		int p_node, p_subnode;
+
+		p_node = fdt_node_offset_by_phandle(fdt, fdt32_to_cpu(*cuint));
+		if (p_node < 0) {
+			return -FDT_ERR_NOTFOUND;
+		}
+
+		fdt_for_each_subnode(p_subnode, fdt, p_node) {
+			int ret = dt_set_gpio_config(fdt, p_subnode, status);
+
+			if (ret < 0) {
+				return ret;
+			}
+		}
+
+		cuint++;
+	}
+
+	return 0;
+}
+
+void set_gpio(uint32_t bank, uint32_t pin, uint32_t mode, uint32_t speed,
+	      uint32_t pull, uint32_t alternate, uint8_t status)
+{
+	uintptr_t base = stm32_get_gpio_bank_base(bank);
+	unsigned long clock = stm32_get_gpio_bank_clock(bank);
+
+	assert(pin <= GPIO_PIN_MAX);
+
+	stm32mp1_clk_enable(clock);
+
 	mmio_clrbits_32(base + GPIO_MODE_OFFSET,
 			((uint32_t)GPIO_MODE_MASK << (pin << 1)));
 	mmio_setbits_32(base + GPIO_MODE_OFFSET,
@@ -85,4 +253,24 @@ void set_gpio(uint32_t bank, uint32_t pin, uint32_t mode, uint32_t speed,
 		mmio_read_32(base + GPIO_AFRL_OFFSET));
 	VERBOSE("GPIO %u mode alternate high to 0x%x\n", bank,
 		mmio_read_32(base + GPIO_AFRH_OFFSET));
+
+	stm32mp1_clk_disable((unsigned long)clock);
+}
+
+void set_gpio_secure_cfg(uint32_t bank, uint32_t pin, bool secure)
+{
+	uintptr_t base = stm32_get_gpio_bank_base(bank);
+	int clock = stm32_get_gpio_bank_clock(bank);
+
+	assert(pin <= GPIO_PIN_MAX);
+
+	stm32mp1_clk_enable((unsigned long)clock);
+
+	if (secure) {
+		mmio_setbits_32(base + GPIO_SECR_OFFSET, BIT(pin));
+	} else {
+		mmio_clrbits_32(base + GPIO_SECR_OFFSET, BIT(pin));
+	}
+
+	stm32mp1_clk_disable((unsigned long)clock);
 }

drivers/st/mmc/stm32_sdmmc2.c

@@ -17,6 +17,7 @@
 #include <common/debug.h>
 #include <drivers/delay_timer.h>
 #include <drivers/mmc.h>
+#include <drivers/st/stm32_gpio.h>
 #include <drivers/st/stm32_sdmmc2.h>
 #include <drivers/st/stm32mp1_clk.h>
 #include <drivers/st/stm32mp1_rcc.h>
@@ -642,7 +643,7 @@ static int stm32_sdmmc2_dt_get_config(void)
 		return -FDT_ERR_NOTFOUND;
 	}
 
-	if (fdt_check_status(sdmmc_node) == 0) {
+	if (fdt_get_status(sdmmc_node) == DT_DISABLED) {
 		return -FDT_ERR_NOTFOUND;
 	}
 

drivers/st/pmic/stm32mp_pmic.c

@@ -61,7 +61,7 @@ bool dt_check_pmic(void)
 		return false;
 	}
 
-	return fdt_check_status(node);
+	return fdt_get_status(node);
 }
 
 static int dt_pmic_i2c_config(struct dt_node_info *i2c_info)

include/drivers/st/stm32_gpio.h

@@ -9,10 +9,6 @@
 
 #include <lib/utils_def.h>
 
-#define STM32_GPIOA_BANK	U(0x50002000)
-#define STM32_GPIOZ_BANK	U(0x54004000)
-#define STM32_GPIO_BANK_OFFSET	U(0x1000)
-
 #define GPIO_MODE_OFFSET	U(0x00)
 #define GPIO_TYPE_OFFSET	U(0x04)
 #define GPIO_SPEED_OFFSET	U(0x08)
@@ -20,56 +16,14 @@
 #define GPIO_BSRR_OFFSET	U(0x18)
 #define GPIO_AFRL_OFFSET	U(0x20)
 #define GPIO_AFRH_OFFSET	U(0x24)
+#define GPIO_SECR_OFFSET	U(0x30)
 
 #define GPIO_ALT_LOWER_LIMIT	U(0x08)
 
-#define GPIO_BANK_A		U(0x00)
-#define GPIO_BANK_B		U(0x01)
-#define GPIO_BANK_C		U(0x02)
-#define GPIO_BANK_D		U(0x03)
-#define GPIO_BANK_E		U(0x04)
-#define GPIO_BANK_F		U(0x05)
-#define GPIO_BANK_G		U(0x06)
-#define GPIO_BANK_H		U(0x07)
-#define GPIO_BANK_I		U(0x08)
-#define GPIO_BANK_J		U(0x09)
-#define GPIO_BANK_K		U(0x0A)
-#define GPIO_BANK_Z		U(0x19)
-
-#define GPIO_PIN_0		U(0x00)
-#define GPIO_PIN_1		U(0x01)
-#define GPIO_PIN_2		U(0x02)
-#define GPIO_PIN_3		U(0x03)
-#define GPIO_PIN_4		U(0x04)
-#define GPIO_PIN_5		U(0x05)
-#define GPIO_PIN_6		U(0x06)
-#define GPIO_PIN_7		U(0x07)
-#define GPIO_PIN_8		U(0x08)
-#define GPIO_PIN_9		U(0x09)
-#define GPIO_PIN_10		U(0x0A)
-#define GPIO_PIN_11		U(0x0B)
-#define GPIO_PIN_12		U(0x0C)
-#define GPIO_PIN_13		U(0x0D)
-#define GPIO_PIN_14		U(0x0E)
-#define GPIO_PIN_15		U(0x0F)
-#define GPIO_PIN_MAX		GPIO_PIN_15
+#define GPIO_PIN_(_x)		U(_x)
+#define GPIO_PIN_MAX		GPIO_PIN_(15)
 
-#define GPIO_ALTERNATE_0	0x00
-#define GPIO_ALTERNATE_1	0x01
-#define GPIO_ALTERNATE_2	0x02
-#define GPIO_ALTERNATE_3	0x03
-#define GPIO_ALTERNATE_4	0x04
-#define GPIO_ALTERNATE_5	0x05
-#define GPIO_ALTERNATE_6	0x06
-#define GPIO_ALTERNATE_7	0x07
-#define GPIO_ALTERNATE_8	0x08
-#define GPIO_ALTERNATE_9	0x09
-#define GPIO_ALTERNATE_10	0x0A
-#define GPIO_ALTERNATE_11	0x0B
-#define GPIO_ALTERNATE_12	0x0C
-#define GPIO_ALTERNATE_13	0x0D
-#define GPIO_ALTERNATE_14	0x0E
-#define GPIO_ALTERNATE_15	0x0F
+#define GPIO_ALTERNATE_(_x)	U(_x)
 #define GPIO_ALTERNATE_MASK	U(0x0F)
 
 #define GPIO_MODE_INPUT		0x00
@@ -94,8 +48,10 @@
 #ifndef __ASSEMBLY__
 #include <stdint.h>
 
+int dt_set_pinctrl_config(int node);
 void set_gpio(uint32_t bank, uint32_t pin, uint32_t mode, uint32_t speed,
-	      uint32_t pull, uint32_t alternate);
+	      uint32_t pull, uint32_t alternate, uint8_t status);
+void set_gpio_secure_cfg(uint32_t bank, uint32_t pin, bool secure);
 #endif /*__ASSEMBLY__*/
 
 #endif /* STM32_GPIO_H */

plat/st/stm32mp1/include/stm32mp1_dt.h

 /*
- * Copyright (c) 2017-2018, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2017-2019, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -9,12 +9,16 @@
 
 #include <stdbool.h>
 
+#define DT_DISABLED		U(0)
+#define DT_NON_SECURE		U(1)
+#define DT_SECURE		U(2)
+#define DT_SHARED		(DT_NON_SECURE | DT_SECURE)
+
 struct dt_node_info {
 	uint32_t base;
 	int32_t clock;
 	int32_t reset;
-	bool status;
-	bool sec_status;
+	uint32_t status;
 };
 
 /*******************************************************************************
@@ -23,13 +27,11 @@ struct dt_node_info {
 int dt_open_and_check(void);
 int fdt_get_address(void **fdt_addr);
 bool fdt_check_node(int node);
-bool fdt_check_status(int node);
-bool fdt_check_secure_status(int node);
+uint32_t fdt_get_status(int node);
 uint32_t fdt_read_uint32_default(int node, const char *prop_name,
 				 uint32_t dflt_value);
 int fdt_read_uint32_array(int node, const char *prop_name,
 			  uint32_t *array, uint32_t count);
-int dt_set_pinctrl_config(int node);
 int dt_set_stdout_pinctrl(void);
 void dt_fill_device_info(struct dt_node_info *info, int node);
 int dt_get_node(struct dt_node_info *info, int offset, const char *compat);

plat/st/stm32mp1/include/stm32mp1_private.h

 /*
- * Copyright (c) 2015-2018, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2015-2019, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -21,4 +21,8 @@ uintptr_t stm32mp1_get_boot_ctx_address(void);
 void stm32mp1_gic_pcpu_init(void);
 void stm32mp1_gic_init(void);
 
+uintptr_t stm32_get_gpio_bank_base(unsigned int bank);
+unsigned long stm32_get_gpio_bank_clock(unsigned int bank);
+uint32_t stm32_get_gpio_bank_offset(unsigned int bank);
+
 #endif /* STM32MP1_PRIVATE_H */

plat/st/stm32mp1/sp_min/sp_min_setup.c

@@ -117,7 +117,7 @@ void sp_min_early_platform_setup2(u_register_t arg0, u_register_t arg1,
 
 	result = dt_get_stdout_uart_info(&dt_uart_info);
 
-	if ((result > 0) && dt_uart_info.status) {
+	if ((result > 0) && (dt_uart_info.status != 0U)) {
 		if (console_stm32_register(dt_uart_info.base, 0,
 					   STM32MP1_UART_BAUDRATE, &console) ==
 		    0) {

plat/st/stm32mp1/stm32mp1_common.c

@@ -12,6 +12,7 @@
 #include <common/bl_common.h>
 #include <common/debug.h>
 #include <drivers/arm/gicv2.h>
+#include <dt-bindings/clock/stm32mp1-clks.h>
 #include <lib/mmio.h>
 #include <lib/xlat_tables/xlat_tables_v2.h>
 #include <plat/common/platform.h>
@@ -86,3 +87,37 @@ uintptr_t stm32mp1_get_boot_ctx_address(void)
 {
 	return boot_ctx_address;
 }
+
+uintptr_t stm32_get_gpio_bank_base(unsigned int bank)
+{
+	switch (bank) {
+	case GPIO_BANK_A ... GPIO_BANK_K:
+		return GPIOA_BASE + (bank * GPIO_BANK_OFFSET);
+	case GPIO_BANK_Z:
+		return GPIOZ_BASE;
+	default:
+		panic();
+	}
+}
+
+/* Return clock ID on success, negative value on error */
+unsigned long stm32_get_gpio_bank_clock(unsigned int bank)
+{
+	switch (bank) {
+	case GPIO_BANK_A ... GPIO_BANK_K:
+		return GPIOA + (bank - GPIO_BANK_A);
+	case GPIO_BANK_Z:
+		return GPIOZ;
+	default:
+		panic();
+	}
+}
+
+uint32_t stm32_get_gpio_bank_offset(unsigned int bank)
+{
+	if (bank == GPIO_BANK_Z) {
+		return 0;
+	} else {
+		return bank * GPIO_BANK_OFFSET;
+	}
+}

plat/st/stm32mp1/stm32mp1_def.h

@@ -111,6 +111,39 @@ enum ddr_type {
  ******************************************************************************/
 #define PWR_BASE			U(0x50001000)
 
+/*******************************************************************************
+ * STM32MP1 GPIO
+ ******************************************************************************/
+#define GPIOA_BASE			U(0x50002000)
+#define GPIOB_BASE			U(0x50003000)
+#define GPIOC_BASE			U(0x50004000)
+#define GPIOD_BASE			U(0x50005000)
+#define GPIOE_BASE			U(0x50006000)
+#define GPIOF_BASE			U(0x50007000)
+#define GPIOG_BASE			U(0x50008000)
+#define GPIOH_BASE			U(0x50009000)
+#define GPIOI_BASE			U(0x5000A000)
+#define GPIOJ_BASE			U(0x5000B000)
+#define GPIOK_BASE			U(0x5000C000)
+#define GPIOZ_BASE			U(0x54004000)
+#define GPIO_BANK_OFFSET		U(0x1000)
+
+/* Bank IDs used in GPIO driver API */
+#define GPIO_BANK_A			U(0)
+#define GPIO_BANK_B			U(1)
+#define GPIO_BANK_C			U(2)
+#define GPIO_BANK_D			U(3)
+#define GPIO_BANK_E			U(4)
+#define GPIO_BANK_F			U(5)
+#define GPIO_BANK_G			U(6)
+#define GPIO_BANK_H			U(7)
+#define GPIO_BANK_I			U(8)
+#define GPIO_BANK_J			U(9)
+#define GPIO_BANK_K			U(10)
+#define GPIO_BANK_Z			U(25)
+
+#define STM32MP_GPIOZ_PIN_MAX_COUNT	8
+
 /*******************************************************************************
  * STM32MP1 UART
  ******************************************************************************/
@@ -122,8 +155,21 @@ enum ddr_type {
 #define USART6_BASE			U(0x44003000)
 #define UART7_BASE			U(0x40018000)
 #define UART8_BASE			U(0x40019000)
+#define STM32MP1_UART_BAUDRATE		U(115200)
+
+/* For UART crash console */
 #define STM32MP1_DEBUG_USART_BASE	UART4_BASE
-#define STM32MP1_UART_BAUDRATE		115200
+/* UART4 on HSI@64MHz, TX on GPIOG11 Alternate 6 */
+#define STM32MP1_DEBUG_USART_CLK_FRQ	64000000
+#define DEBUG_UART_TX_GPIO_BANK_ADDRESS	GPIOG_BASE
+#define DEBUG_UART_TX_GPIO_BANK_CLK_REG	RCC_MP_AHB4ENSETR
+#define DEBUG_UART_TX_GPIO_BANK_CLK_EN	RCC_MP_AHB4ENSETR_GPIOGEN
+#define DEBUG_UART_TX_GPIO_PORT		11
+#define DEBUG_UART_TX_GPIO_ALTERNATE	6
+#define DEBUG_UART_TX_CLKSRC_REG	RCC_UART24CKSELR
+#define DEBUG_UART_TX_CLKSRC		RCC_UART24CKSELR_HSI
+#define DEBUG_UART_TX_EN_REG		RCC_MP_APB1ENSETR
+#define DEBUG_UART_TX_EN		RCC_MP_APB1ENSETR_UART4EN
 
 /*******************************************************************************
  * STM32MP1 TZC (TZ400)

plat/st/stm32mp1/stm32mp1_dt.c

 /*
- * Copyright (c) 2017-2018, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2017-2019, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
 
 #include <assert.h>
+#include <errno.h>
 
 #include <libfdt.h>
 
@@ -17,135 +18,13 @@
 #include <drivers/st/stm32mp1_ddr.h>
 #include <drivers/st/stm32mp1_ram.h>
 
-#include <stm32mp1_dt.h>
-
-#define DT_GPIO_BANK_SHIFT	12
-#define DT_GPIO_BANK_MASK	0x1F000U
-#define DT_GPIO_PIN_SHIFT	8
-#define DT_GPIO_PIN_MASK	0xF00U
-#define DT_GPIO_MODE_MASK	0xFFU
-
 static int fdt_checked;
 
 static void *fdt = (void *)(uintptr_t)STM32MP1_DTB_BASE;
 
-/*******************************************************************************
- * This function gets the pin settings from DT information.
- * When analyze and parsing is done, set the GPIO registers.
- * Return 0 on success, else return a negative FDT_ERR_xxx error code.
- ******************************************************************************/
-static int dt_set_gpio_config(int node)
-{
-	const fdt32_t *cuint, *slewrate;
-	int len, pinctrl_node, pinctrl_subnode;
-	uint32_t i;
-	uint32_t speed = GPIO_SPEED_LOW;
-	uint32_t pull = GPIO_NO_PULL;
-
-	cuint = fdt_getprop(fdt, node, "pinmux", &len);
-	if (cuint == NULL) {
-		return -FDT_ERR_NOTFOUND;
-	}
-
-	pinctrl_node = fdt_parent_offset(fdt, fdt_parent_offset(fdt, node));
-	if (pinctrl_node < 0) {
-		return -FDT_ERR_NOTFOUND;
-	}
-
-	slewrate = fdt_getprop(fdt, node, "slew-rate", NULL);
-	if (slewrate != NULL) {
-		speed = fdt32_to_cpu(*slewrate);
-	}
-
-	if (fdt_getprop(fdt, node, "bias-pull-up", NULL) != NULL) {
-		pull = GPIO_PULL_UP;
-	} else if (fdt_getprop(fdt, node, "bias-pull-down", NULL) != NULL) {
-		pull = GPIO_PULL_DOWN;
-	} else {
-		VERBOSE("No bias configured in node %d\n", node);
-	}
-
-	for (i = 0; i < ((uint32_t)len / sizeof(uint32_t)); i++) {
-		uint32_t pincfg;
-		uint32_t bank;
-		uint32_t pin;
-		uint32_t mode;
-		uint32_t alternate = GPIO_ALTERNATE_0;
-
-		pincfg = fdt32_to_cpu(*cuint);
-		cuint++;
-
-		bank = (pincfg & DT_GPIO_BANK_MASK) >> DT_GPIO_BANK_SHIFT;
-
-		pin = (pincfg & DT_GPIO_PIN_MASK) >> DT_GPIO_PIN_SHIFT;
-
-		mode = pincfg & DT_GPIO_MODE_MASK;
-
-		switch (mode) {
-		case 0:
-			mode = GPIO_MODE_INPUT;
-			break;
-		case 1 ... 16:
-			alternate = mode - 1U;
-			mode = GPIO_MODE_ALTERNATE;
-			break;
-		case 17:
-			mode = GPIO_MODE_ANALOG;
-			break;
-		default:
-			mode = GPIO_MODE_OUTPUT;
-			break;
-		}
-
-		if (fdt_getprop(fdt, node, "drive-open-drain", NULL) != NULL) {
-			mode |= GPIO_OPEN_DRAIN;
-		}
-
-		fdt_for_each_subnode(pinctrl_subnode, fdt, pinctrl_node) {
-			uint32_t bank_offset;
-			const fdt32_t *cuint2;
-
-			if (fdt_getprop(fdt, pinctrl_subnode,
-					"gpio-controller", NULL) == NULL) {
-				continue;
-			}
-
-			cuint2 = fdt_getprop(fdt, pinctrl_subnode, "reg", NULL);
-			if (cuint2 == NULL) {
-				continue;
-			}
-
-			if (bank == GPIO_BANK_Z) {
-				bank_offset = 0;
-			} else {
-				bank_offset = bank * STM32_GPIO_BANK_OFFSET;
-			}
-
-			if (fdt32_to_cpu(*cuint2) == bank_offset) {
-				int clk_id = fdt_get_clock_id(pinctrl_subnode);
-
-				if (clk_id < 0) {
-					return -FDT_ERR_NOTFOUND;
-				}
-
-				if (stm32mp1_clk_enable((unsigned long)clk_id) <
-				    0) {
-					return -FDT_ERR_BADVALUE;
-				}
-
-				break;
-			}
-		}
-
-		set_gpio(bank, pin, mode, speed, pull, alternate);
-	}
-
-	return 0;
-}
-
 /*******************************************************************************
  * This function checks device tree file with its header.
- * Returns 0 if success, and a negative value else.
+ * Returns 0 on success and a negative FDT error code on failure.
  ******************************************************************************/
 int dt_open_and_check(void)
 {
@@ -174,7 +53,7 @@ int fdt_get_address(void **fdt_addr)
 
 /*******************************************************************************
  * This function check the presence of a node (generic use of fdt library).
- * Returns true if present, false else.
+ * Returns true if present, else return false.
  ******************************************************************************/
 bool fdt_check_node(int node)
 {
@@ -187,37 +66,30 @@ bool fdt_check_node(int node)
 }
 
 /*******************************************************************************
- * This function check the status of a node (generic use of fdt library).
- * Returns true if "okay" or missing, false else.
+ * This function return global node status (generic use of fdt library).
  ******************************************************************************/
-bool fdt_check_status(int node)
+uint32_t fdt_get_status(int node)
 {
+	uint32_t status = DT_DISABLED;
 	int len;
 	const char *cchar;
 
 	cchar = fdt_getprop(fdt, node, "status", &len);
-	if (cchar == NULL) {
-		return true;
+	if ((cchar == NULL) ||
+	    (strncmp(cchar, "okay", (size_t)len) == 0)) {
+		status |= DT_NON_SECURE;
 	}
 
-	return strncmp(cchar, "okay", (size_t)len) == 0;
-}
-
-/*******************************************************************************
- * This function check the secure-status of a node (generic use of fdt library).
- * Returns true if "okay" or missing, false else.
- ******************************************************************************/
-bool fdt_check_secure_status(int node)
-{
-	int len;
-	const char *cchar;
-
 	cchar = fdt_getprop(fdt, node, "secure-status", &len);
 	if (cchar == NULL) {
-		return true;
+		if (status == DT_NON_SECURE) {
+			status |= DT_SECURE;
+		}
+	} else if (strncmp(cchar, "okay", (size_t)len) == 0) {
+		status |= DT_SECURE;
 	}
 
-	return strncmp(cchar, "okay", (size_t)len) == 0;
+	return status;
 }
 
 /*******************************************************************************
@@ -245,7 +117,7 @@ uint32_t fdt_read_uint32_default(int node, const char *prop_name,
  * (generic use of fdt library).
  * It reads the values inside the device tree, from property name and node.
  * The number of parameters is also indicated as entry parameter.
- * Returns 0 if success, and a negative value else.
+ * Returns 0 on success and a negative FDT error code on failure.
  * If success, values are stored at the third parameter address.
  ******************************************************************************/
 int fdt_read_uint32_array(int node, const char *prop_name, uint32_t *array,
@@ -273,53 +145,10 @@ int fdt_read_uint32_array(int node, const char *prop_name, uint32_t *array,
 	return 0;
 }
 
-/*******************************************************************************
- * This function gets the pin settings from DT information.
- * When analyze and parsing is done, set the GPIO registers.
- * Returns 0 if success, and a negative value else.
- ******************************************************************************/
-int dt_set_pinctrl_config(int node)
-{
-	const fdt32_t *cuint;
-	int lenp = 0;
-	uint32_t i;
-
-	if (!fdt_check_status(node)) {
-		return -FDT_ERR_NOTFOUND;
-	}
-
-	cuint = fdt_getprop(fdt, node, "pinctrl-0", &lenp);
-	if (cuint == NULL) {
-		return -FDT_ERR_NOTFOUND;
-	}
-
-	for (i = 0; i < ((uint32_t)lenp / 4U); i++) {
-		int phandle_node, phandle_subnode;
-
-		phandle_node =
-			fdt_node_offset_by_phandle(fdt, fdt32_to_cpu(*cuint));
-		if (phandle_node < 0) {
-			return -FDT_ERR_NOTFOUND;
-		}
-
-		fdt_for_each_subnode(phandle_subnode, fdt, phandle_node) {
-			int ret = dt_set_gpio_config(phandle_subnode);
-
-			if (ret < 0) {
-				return ret;
-			}
-		}
-
-		cuint++;
-	}
-
-	return 0;
-}
-
 /*******************************************************************************
  * This function gets the stdout pin configuration information from the DT.
  * And then calls the sub-function to treat it and set GPIO registers.
- * Returns 0 if success, and a negative value else.
+ * Returns 0 on success and a negative FDT error code on failure.
  ******************************************************************************/
 int dt_set_stdout_pinctrl(void)
 {
@@ -363,13 +192,12 @@ void dt_fill_device_info(struct dt_node_info *info, int node)
 		info->reset = -1;
 	}
 
-	info->status = fdt_check_status(node);
-	info->sec_status = fdt_check_secure_status(node);
+	info->status = fdt_get_status(node);
 }
 
 /*******************************************************************************
  * This function retrieve the generic information from DT.
- * Returns node if success, and a negative value else.
+ * Returns node on success and a negative FDT error code on failure.
  ******************************************************************************/
 int dt_get_node(struct dt_node_info *info, int offset, const char *compat)
 {
@@ -387,7 +215,7 @@ int dt_get_node(struct dt_node_info *info, int offset, const char *compat)
 
 /*******************************************************************************
  * This function gets the UART instance info of stdout from the DT.
- * Returns node if success, and a negative value else.
+ * Returns node on success and a negative FDT error code on failure.
  ******************************************************************************/
 int dt_get_stdout_uart_info(struct dt_node_info *info)
 {
@@ -448,7 +276,7 @@ int dt_get_stdout_node_offset(void)
 
 /*******************************************************************************
  * This function gets DDR size information from the DT.
- * Returns value in bytes if success, and STM32MP1_DDR_SIZE_DFLT else.
+ * Returns value in bytes on success, and 0 on failure.
  ******************************************************************************/
 uint32_t dt_get_ddr_size(void)
 {
@@ -457,11 +285,10 @@ uint32_t dt_get_ddr_size(void)
 	node = fdt_node_offset_by_compatible(fdt, -1, DT_DDR_COMPAT);
 	if (node < 0) {
 		INFO("%s: Cannot read DDR node in DT\n", __func__);
-		return STM32MP1_DDR_SIZE_DFLT;
+		return 0;
 	}
 
-	return fdt_read_uint32_default(node, "st,mem-size",
-				       STM32MP1_DDR_SIZE_DFLT);
+	return fdt_read_uint32_default(node, "st,mem-size", 0);
 }
 
 /*******************************************************************************

plat/st/stm32mp1/stm32mp1_helper.S

 /*
- * Copyright (c) 2015-2018, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2015-2019, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -12,11 +12,8 @@
 #include <drivers/st/stm32_gpio.h>
 #include <drivers/st/stm32mp1_rcc.h>
 
-#define GPIO_BANK_G_ADDRESS	0x50008000
-#define GPIO_TX_PORT		11
-#define GPIO_TX_SHIFT		(GPIO_TX_PORT << 1)
-#define GPIO_TX_ALT_SHIFT	((GPIO_TX_PORT - GPIO_ALT_LOWER_LIMIT) << 2)
-#define STM32MP1_HSI_CLK	64000000
+#define GPIO_TX_SHIFT		(DEBUG_UART_TX_GPIO_PORT << 1)
+#define GPIO_TX_ALT_SHIFT	((DEBUG_UART_TX_GPIO_PORT - GPIO_ALT_LOWER_LIMIT) << 2)
 
 	.globl	platform_mem_init
 	.globl	plat_report_exception
@@ -112,13 +109,13 @@ endfunc plat_my_core_pos
 	 * ---------------------------------------------
 	 */
 func plat_crash_console_init
-	/* Enable GPIOs for UART4 TX */
-	ldr	r1, =(RCC_BASE + RCC_MP_AHB4ENSETR)
+	/* Enable GPIOs for UART TX */
+	ldr	r1, =(RCC_BASE + DEBUG_UART_TX_GPIO_BANK_CLK_REG)
 	ldr	r2, [r1]
-	/* Configure GPIO G11 */
-	orr	r2, r2, #RCC_MP_AHB4ENSETR_GPIOGEN
+	/* Configure GPIO */
+	orr	r2, r2, #DEBUG_UART_TX_GPIO_BANK_CLK_EN
 	str	r2, [r1]
-	ldr	r1, =GPIO_BANK_G_ADDRESS
+	ldr	r1, =DEBUG_UART_TX_GPIO_BANK_ADDRESS
 	/* Set GPIO mode alternate */
 	ldr	r2, [r1, #GPIO_MODE_OFFSET]
 	bic	r2, r2, #(GPIO_MODE_MASK << GPIO_TX_SHIFT)
@@ -132,23 +129,22 @@ func plat_crash_console_init
 	ldr	r2, [r1, #GPIO_PUPD_OFFSET]
 	bic	r2, r2, #(GPIO_PULL_MASK << GPIO_TX_SHIFT)
 	str	r2, [r1, #GPIO_PUPD_OFFSET]
-	/* Set alternate AF6 */
+	/* Set alternate */
 	ldr	r2, [r1, #GPIO_AFRH_OFFSET]
 	bic	r2, r2, #(GPIO_ALTERNATE_MASK << GPIO_TX_ALT_SHIFT)
-	orr	r2, r2, #(GPIO_ALTERNATE_6 << GPIO_TX_ALT_SHIFT)
+	orr	r2, r2, #(DEBUG_UART_TX_GPIO_ALTERNATE << GPIO_TX_ALT_SHIFT)
 	str	r2, [r1, #GPIO_AFRH_OFFSET]
-
-	/* Enable UART clock, with HSI source */
-	ldr	r1, =(RCC_BASE + RCC_UART24CKSELR)
-	mov	r2, #RCC_UART24CKSELR_HSI
+	/* Enable UART clock, with its source */
+	ldr	r1, =(RCC_BASE + DEBUG_UART_TX_CLKSRC_REG)
+	mov	r2, #DEBUG_UART_TX_CLKSRC
 	str	r2, [r1]
-	ldr	r1, =(RCC_BASE + RCC_MP_APB1ENSETR)
+	ldr	r1, =(RCC_BASE + DEBUG_UART_TX_EN_REG)
 	ldr	r2, [r1]
-	orr	r2, r2, #RCC_MP_APB1ENSETR_UART4EN
+	orr	r2, r2, #DEBUG_UART_TX_EN
 	str	r2, [r1]
 
 	ldr	r0, =STM32MP1_DEBUG_USART_BASE
-	ldr	r1, =STM32MP1_HSI_CLK
+	ldr	r1, =STM32MP1_DEBUG_USART_CLK_FRQ
 	ldr	r2, =STM32MP1_UART_BAUDRATE
 	b	console_stm32_core_init
 endfunc plat_crash_console_init