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author | Albert ARIBAUD <albert.u.boot@aribaud.net> | 2013-03-26 10:40:13 +0100 |
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committer | Albert ARIBAUD <albert.u.boot@aribaud.net> | 2013-03-26 10:40:13 +0100 |
commit | ebd749da69f423a26222d2cdde9a77007fd8b4b7 (patch) | |
tree | ea0bff7917f8695f31ce4da58b01d298ab2d981a /arch | |
parent | 412665b46134f93464c09405e02f08ac9c62526d (diff) | |
parent | f789be6086f3e6302fe4b163fa9b7bd6b358c4ce (diff) | |
download | u-boot-imx-ebd749da69f423a26222d2cdde9a77007fd8b4b7.zip u-boot-imx-ebd749da69f423a26222d2cdde9a77007fd8b4b7.tar.gz u-boot-imx-ebd749da69f423a26222d2cdde9a77007fd8b4b7.tar.bz2 |
Merge branch 'u-boot-tegra/master' into 'u-boot-arm/master'
Diffstat (limited to 'arch')
-rw-r--r-- | arch/arm/dts/tegra114.dtsi | 141 | ||||
-rw-r--r-- | arch/arm/include/asm/arch-tegra/board.h | 3 | ||||
-rw-r--r-- | arch/arm/include/asm/arch-tegra/tegra_slink.h | 84 | ||||
-rw-r--r-- | arch/arm/include/asm/arch-tegra/tegra_spi.h | 75 | ||||
-rw-r--r-- | arch/arm/include/asm/arch-tegra114/gp_padctrl.h | 6 | ||||
-rw-r--r-- | arch/arm/include/asm/arch-tegra114/tegra114_spi.h | 41 | ||||
-rw-r--r-- | arch/arm/include/asm/arch-tegra20/tegra20_sflash.h | 41 | ||||
-rw-r--r-- | arch/arm/include/asm/arch-tegra20/tegra20_slink.h | 41 | ||||
-rw-r--r-- | arch/arm/include/asm/arch-tegra20/uart-spi-switch.h | 46 |
9 files changed, 271 insertions, 207 deletions
diff --git a/arch/arm/dts/tegra114.dtsi b/arch/arm/dts/tegra114.dtsi index 701c0f9..f86d18d 100644 --- a/arch/arm/dts/tegra114.dtsi +++ b/arch/arm/dts/tegra114.dtsi @@ -9,6 +9,43 @@ #clock-cells = <1>; }; + apbdma: dma { + compatible = "nvidia,tegra114-apbdma", "nvidia,tegra30-apbdma", "nvidia,tegra20-apbdma"; + reg = <0x6000a000 0x1400>; + interrupts = <0 104 0x04 + 0 105 0x04 + 0 106 0x04 + 0 107 0x04 + 0 108 0x04 + 0 109 0x04 + 0 110 0x04 + 0 111 0x04 + 0 112 0x04 + 0 113 0x04 + 0 114 0x04 + 0 115 0x04 + 0 116 0x04 + 0 117 0x04 + 0 118 0x04 + 0 119 0x04 + 0 128 0x04 + 0 129 0x04 + 0 130 0x04 + 0 131 0x04 + 0 132 0x04 + 0 133 0x04 + 0 134 0x04 + 0 135 0x04 + 0 136 0x04 + 0 137 0x04 + 0 138 0x04 + 0 139 0x04 + 0 140 0x04 + 0 141 0x04 + 0 142 0x04 + 0 143 0x04>; + }; + gpio: gpio { compatible = "nvidia,tegra114-gpio", "nvidia,tegra30-gpio"; reg = <0x6000d000 0x1000>; @@ -75,4 +112,108 @@ clocks = <&tegra_car 47>; status = "disabled"; }; + + spi@7000d400 { + compatible = "nvidia,tegra114-spi"; + reg = <0x7000d400 0x200>; + interrupts = <0 59 0x04>; + nvidia,dma-request-selector = <&apbdma 15>; + #address-cells = <1>; + #size-cells = <0>; + status = "disabled"; + /* PERIPH_ID_SBC1, PLLP_OUT0 */ + clocks = <&tegra_car 41>; + }; + + spi@7000d600 { + compatible = "nvidia,tegra114-spi"; + reg = <0x7000d600 0x200>; + interrupts = <0 82 0x04>; + nvidia,dma-request-selector = <&apbdma 16>; + #address-cells = <1>; + #size-cells = <0>; + status = "disabled"; + /* PERIPH_ID_SBC2, PLLP_OUT0 */ + clocks = <&tegra_car 44>; + }; + + spi@7000d800 { + compatible = "nvidia,tegra114-spi"; + reg = <0x7000d480 0x200>; + interrupts = <0 83 0x04>; + nvidia,dma-request-selector = <&apbdma 17>; + #address-cells = <1>; + #size-cells = <0>; + status = "disabled"; + /* PERIPH_ID_SBC3, PLLP_OUT0 */ + clocks = <&tegra_car 46>; + }; + + spi@7000da00 { + compatible = "nvidia,tegra114-spi"; + reg = <0x7000da00 0x200>; + interrupts = <0 93 0x04>; + nvidia,dma-request-selector = <&apbdma 18>; + #address-cells = <1>; + #size-cells = <0>; + status = "disabled"; + /* PERIPH_ID_SBC4, PLLP_OUT0 */ + clocks = <&tegra_car 68>; + }; + + spi@7000dc00 { + compatible = "nvidia,tegra114-spi"; + reg = <0x7000dc00 0x200>; + interrupts = <0 94 0x04>; + nvidia,dma-request-selector = <&apbdma 27>; + #address-cells = <1>; + #size-cells = <0>; + status = "disabled"; + /* PERIPH_ID_SBC5, PLLP_OUT0 */ + clocks = <&tegra_car 104>; + }; + + spi@7000de00 { + compatible = "nvidia,tegra114-spi"; + reg = <0x7000de00 0x200>; + interrupts = <0 79 0x04>; + nvidia,dma-request-selector = <&apbdma 28>; + #address-cells = <1>; + #size-cells = <0>; + status = "disabled"; + /* PERIPH_ID_SBC6, PLLP_OUT0 */ + clocks = <&tegra_car 105>; + }; + + sdhci@78000000 { + compatible = "nvidia,tegra114-sdhci", "nvidia,tegra30-sdhci"; + reg = <0x78000000 0x200>; + interrupts = <0 14 0x04>; + clocks = <&tegra_car 14>; + status = "disable"; + }; + + sdhci@78000200 { + compatible = "nvidia,tegra114-sdhci", "nvidia,tegra30-sdhci"; + reg = <0x78000200 0x200>; + interrupts = <0 15 0x04>; + clocks = <&tegra_car 9>; + status = "disable"; + }; + + sdhci@78000400 { + compatible = "nvidia,tegra114-sdhci", "nvidia,tegra30-sdhci"; + reg = <0x78000400 0x200>; + interrupts = <0 19 0x04>; + clocks = <&tegra_car 69>; + status = "disable"; + }; + + sdhci@78000600 { + compatible = "nvidia,tegra114-sdhci", "nvidia,tegra30-sdhci"; + reg = <0x78000600 0x200>; + interrupts = <0 31 0x04>; + clocks = <&tegra_car 15>; + status = "disable"; + }; }; diff --git a/arch/arm/include/asm/arch-tegra/board.h b/arch/arm/include/asm/arch-tegra/board.h index 3db0d93..1a66990 100644 --- a/arch/arm/include/asm/arch-tegra/board.h +++ b/arch/arm/include/asm/arch-tegra/board.h @@ -25,8 +25,7 @@ #define _TEGRA_BOARD_H_ /* Set up pinmux to make UART usable */ -void gpio_config_uart(void); /* CONFIG_SPI_UART_SWITCH */ -void gpio_early_init_uart(void); /*!CONFIG_SPI_UART_SWITCH */ +void gpio_early_init_uart(void); /* Set up early UART output */ void board_init_uart_f(void); diff --git a/arch/arm/include/asm/arch-tegra/tegra_slink.h b/arch/arm/include/asm/arch-tegra/tegra_slink.h deleted file mode 100644 index 74804b5..0000000 --- a/arch/arm/include/asm/arch-tegra/tegra_slink.h +++ /dev/null @@ -1,84 +0,0 @@ -/* - * NVIDIA Tegra SPI-SLINK controller - * - * Copyright 2010-2013 NVIDIA Corporation - * - * This software may be used and distributed according to the - * terms of the GNU Public License, Version 2, incorporated - * herein by reference. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * Version 2 as published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, - * MA 02111-1307 USA - */ - -#ifndef _TEGRA_SLINK_H_ -#define _TEGRA_SLINK_H_ - -#include <asm/types.h> - -struct slink_tegra { - u32 command; /* SLINK_COMMAND_0 register */ - u32 command2; /* SLINK_COMMAND2_0 reg */ - u32 status; /* SLINK_STATUS_0 register */ - u32 reserved; /* Reserved offset 0C */ - u32 mas_data; /* SLINK_MAS_DATA_0 reg */ - u32 slav_data; /* SLINK_SLAVE_DATA_0 reg */ - u32 dma_ctl; /* SLINK_DMA_CTL_0 register */ - u32 status2; /* SLINK_STATUS2_0 reg */ - u32 rsvd[56]; /* 0x20 to 0xFF reserved */ - u32 tx_fifo; /* SLINK_TX_FIFO_0 reg off 100h */ - u32 rsvd2[31]; /* 0x104 to 0x17F reserved */ - u32 rx_fifo; /* SLINK_RX_FIFO_0 reg off 180h */ -}; - -/* COMMAND */ -#define SLINK_CMD_ENB (1 << 31) -#define SLINK_CMD_GO (1 << 30) -#define SLINK_CMD_M_S (1 << 28) -#define SLINK_CMD_CK_SDA (1 << 21) -#define SLINK_CMD_CS_POL (1 << 13) -#define SLINK_CMD_CS_VAL (1 << 12) -#define SLINK_CMD_CS_SOFT (1 << 11) -#define SLINK_CMD_BIT_LENGTH (1 << 4) -#define SLINK_CMD_BIT_LENGTH_MASK 0x0000001F -/* COMMAND2 */ -#define SLINK_CMD2_TXEN (1 << 30) -#define SLINK_CMD2_RXEN (1 << 31) -#define SLINK_CMD2_SS_EN (1 << 18) -#define SLINK_CMD2_SS_EN_SHIFT 18 -#define SLINK_CMD2_SS_EN_MASK 0x000C0000 -#define SLINK_CMD2_CS_ACTIVE_BETWEEN (1 << 17) -/* STATUS */ -#define SLINK_STAT_BSY (1 << 31) -#define SLINK_STAT_RDY (1 << 30) -#define SLINK_STAT_ERR (1 << 29) -#define SLINK_STAT_RXF_FLUSH (1 << 27) -#define SLINK_STAT_TXF_FLUSH (1 << 26) -#define SLINK_STAT_RXF_OVF (1 << 25) -#define SLINK_STAT_TXF_UNR (1 << 24) -#define SLINK_STAT_RXF_EMPTY (1 << 23) -#define SLINK_STAT_RXF_FULL (1 << 22) -#define SLINK_STAT_TXF_EMPTY (1 << 21) -#define SLINK_STAT_TXF_FULL (1 << 20) -#define SLINK_STAT_TXF_OVF (1 << 19) -#define SLINK_STAT_RXF_UNR (1 << 18) -#define SLINK_STAT_CUR_BLKCNT (1 << 15) -/* STATUS2 */ -#define SLINK_STAT2_RXF_FULL_CNT (1 << 16) -#define SLINK_STAT2_TXF_FULL_CNT (1 << 0) - -#define SPI_TIMEOUT 1000 -#define TEGRA_SPI_MAX_FREQ 52000000 - -#endif /* _TEGRA_SLINK_H_ */ diff --git a/arch/arm/include/asm/arch-tegra/tegra_spi.h b/arch/arm/include/asm/arch-tegra/tegra_spi.h deleted file mode 100644 index d53a93f..0000000 --- a/arch/arm/include/asm/arch-tegra/tegra_spi.h +++ /dev/null @@ -1,75 +0,0 @@ -/* - * NVIDIA Tegra20 SPI-FLASH controller - * - * Copyright 2010-2012 NVIDIA Corporation - * - * This software may be used and distributed according to the - * terms of the GNU Public License, Version 2, incorporated - * herein by reference. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * Version 2 as published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, - * MA 02111-1307 USA - */ - -#ifndef _TEGRA_SPI_H_ -#define _TEGRA_SPI_H_ - -#include <asm/types.h> - -struct spi_tegra { - u32 command; /* SPI_COMMAND_0 register */ - u32 status; /* SPI_STATUS_0 register */ - u32 rx_cmp; /* SPI_RX_CMP_0 register */ - u32 dma_ctl; /* SPI_DMA_CTL_0 register */ - u32 tx_fifo; /* SPI_TX_FIFO_0 register */ - u32 rsvd[3]; /* offsets 0x14 to 0x1F reserved */ - u32 rx_fifo; /* SPI_RX_FIFO_0 register */ -}; - -#define SPI_CMD_GO (1 << 30) -#define SPI_CMD_ACTIVE_SCLK_SHIFT 26 -#define SPI_CMD_ACTIVE_SCLK_MASK (3 << SPI_CMD_ACTIVE_SCLK_SHIFT) -#define SPI_CMD_CK_SDA (1 << 21) -#define SPI_CMD_ACTIVE_SDA_SHIFT 18 -#define SPI_CMD_ACTIVE_SDA_MASK (3 << SPI_CMD_ACTIVE_SDA_SHIFT) -#define SPI_CMD_CS_POL (1 << 16) -#define SPI_CMD_TXEN (1 << 15) -#define SPI_CMD_RXEN (1 << 14) -#define SPI_CMD_CS_VAL (1 << 13) -#define SPI_CMD_CS_SOFT (1 << 12) -#define SPI_CMD_CS_DELAY (1 << 9) -#define SPI_CMD_CS3_EN (1 << 8) -#define SPI_CMD_CS2_EN (1 << 7) -#define SPI_CMD_CS1_EN (1 << 6) -#define SPI_CMD_CS0_EN (1 << 5) -#define SPI_CMD_BIT_LENGTH (1 << 4) -#define SPI_CMD_BIT_LENGTH_MASK 0x0000001F - -#define SPI_STAT_BSY (1 << 31) -#define SPI_STAT_RDY (1 << 30) -#define SPI_STAT_RXF_FLUSH (1 << 29) -#define SPI_STAT_TXF_FLUSH (1 << 28) -#define SPI_STAT_RXF_UNR (1 << 27) -#define SPI_STAT_TXF_OVF (1 << 26) -#define SPI_STAT_RXF_EMPTY (1 << 25) -#define SPI_STAT_RXF_FULL (1 << 24) -#define SPI_STAT_TXF_EMPTY (1 << 23) -#define SPI_STAT_TXF_FULL (1 << 22) -#define SPI_STAT_SEL_TXRX_N (1 << 16) -#define SPI_STAT_CUR_BLKCNT (1 << 15) - -#define SPI_TIMEOUT 1000 -#define TEGRA_SPI_MAX_FREQ 52000000 - -#endif /* _TEGRA_SPI_H_ */ diff --git a/arch/arm/include/asm/arch-tegra114/gp_padctrl.h b/arch/arm/include/asm/arch-tegra114/gp_padctrl.h index 1ef1a14..41ce677 100644 --- a/arch/arm/include/asm/arch-tegra114/gp_padctrl.h +++ b/arch/arm/include/asm/arch-tegra114/gp_padctrl.h @@ -74,4 +74,10 @@ struct apb_misc_gp_ctlr { u32 aocfg0; /* 0x1AC: APB_MISC_GP_AOCFG0PADCTRL */ }; +/* SDMMC1/3 settings from section 27.5 of T114 TRM */ +#define SDIOCFG_DRVUP_SLWF 0 +#define SDIOCFG_DRVDN_SLWR 0 +#define SDIOCFG_DRVUP 0x24 +#define SDIOCFG_DRVDN 0x14 + #endif /* _TEGRA114_GP_PADCTRL_H_ */ diff --git a/arch/arm/include/asm/arch-tegra114/tegra114_spi.h b/arch/arm/include/asm/arch-tegra114/tegra114_spi.h new file mode 100644 index 0000000..48197bc --- /dev/null +++ b/arch/arm/include/asm/arch-tegra114/tegra114_spi.h @@ -0,0 +1,41 @@ +/* + * NVIDIA Tegra SPI controller + * + * Copyright 2010-2013 NVIDIA Corporation + * + * This software may be used and distributed according to the + * terms of the GNU Public License, Version 2, incorporated + * herein by reference. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * Version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#ifndef _TEGRA114_SPI_H_ +#define _TEGRA114_SPI_H_ + +#include <asm/types.h> + +int tegra114_spi_init(int *node_list, int count); +int tegra114_spi_cs_is_valid(unsigned int bus, unsigned int cs); +struct spi_slave *tegra114_spi_setup_slave(unsigned int bus, unsigned int cs, + unsigned int max_hz, unsigned int mode); +void tegra114_spi_free_slave(struct spi_slave *slave); +int tegra114_spi_claim_bus(struct spi_slave *slave); +void tegra114_spi_cs_activate(struct spi_slave *slave); +void tegra114_spi_cs_deactivate(struct spi_slave *slave); +int tegra114_spi_xfer(struct spi_slave *slave, unsigned int bitlen, + const void *data_out, void *data_in, unsigned long flags); + +#endif /* _TEGRA114_SPI_H_ */ diff --git a/arch/arm/include/asm/arch-tegra20/tegra20_sflash.h b/arch/arm/include/asm/arch-tegra20/tegra20_sflash.h new file mode 100644 index 0000000..e8cc68c --- /dev/null +++ b/arch/arm/include/asm/arch-tegra20/tegra20_sflash.h @@ -0,0 +1,41 @@ +/* + * NVIDIA Tegra20 SPI-FLASH controller + * + * Copyright 2010-2012 NVIDIA Corporation + * + * This software may be used and distributed according to the + * terms of the GNU Public License, Version 2, incorporated + * herein by reference. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * Version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#ifndef _TEGRA20_SPI_H_ +#define _TEGRA20_SPI_H_ + +#include <asm/types.h> + +int tegra20_spi_cs_is_valid(unsigned int bus, unsigned int cs); +struct spi_slave *tegra20_spi_setup_slave(unsigned int bus, unsigned int cs, + unsigned int max_hz, unsigned int mode); +void tegra20_spi_free_slave(struct spi_slave *slave); +int tegra20_spi_init(int *node_list, int count); +int tegra20_spi_claim_bus(struct spi_slave *slave); +void tegra20_spi_cs_activate(struct spi_slave *slave); +void tegra20_spi_cs_deactivate(struct spi_slave *slave); +int tegra20_spi_xfer(struct spi_slave *slave, unsigned int bitlen, + const void *data_out, void *data_in, unsigned long flags); + +#endif /* _TEGRA20_SPI_H_ */ diff --git a/arch/arm/include/asm/arch-tegra20/tegra20_slink.h b/arch/arm/include/asm/arch-tegra20/tegra20_slink.h new file mode 100644 index 0000000..5aa74dd --- /dev/null +++ b/arch/arm/include/asm/arch-tegra20/tegra20_slink.h @@ -0,0 +1,41 @@ +/* + * NVIDIA Tegra SPI-SLINK controller + * + * Copyright 2010-2013 NVIDIA Corporation + * + * This software may be used and distributed according to the + * terms of the GNU Public License, Version 2, incorporated + * herein by reference. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * Version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#ifndef _TEGRA30_SPI_H_ +#define _TEGRA30_SPI_H_ + +#include <asm/types.h> + +int tegra30_spi_init(int *node_list, int count); +int tegra30_spi_cs_is_valid(unsigned int bus, unsigned int cs); +struct spi_slave *tegra30_spi_setup_slave(unsigned int bus, unsigned int cs, + unsigned int max_hz, unsigned int mode); +void tegra30_spi_free_slave(struct spi_slave *slave); +int tegra30_spi_claim_bus(struct spi_slave *slave); +void tegra30_spi_cs_activate(struct spi_slave *slave); +void tegra30_spi_cs_deactivate(struct spi_slave *slave); +int tegra30_spi_xfer(struct spi_slave *slave, unsigned int bitlen, + const void *data_out, void *data_in, unsigned long flags); + +#endif /* _TEGRA30_SPI_H_ */ diff --git a/arch/arm/include/asm/arch-tegra20/uart-spi-switch.h b/arch/arm/include/asm/arch-tegra20/uart-spi-switch.h deleted file mode 100644 index 82ac180..0000000 --- a/arch/arm/include/asm/arch-tegra20/uart-spi-switch.h +++ /dev/null @@ -1,46 +0,0 @@ -/* - * Copyright (c) 2011 The Chromium OS Authors. - * See file CREDITS for list of people who contributed to this - * project. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License as - * published by the Free Software Foundation; either version 2 of - * the License, or (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, - * MA 02111-1307 USA - */ - -#ifndef _UART_SPI_SWITCH_H -#define _UART_SPI_SWITCH_H - -#if defined(CONFIG_SPI_UART_SWITCH) -/* - * Signal that we are about to use the UART. This unfortunate hack is - * required by Seaboard, which cannot use its console and SPI at the same - * time! If the board file provides this, the board config will declare it. - * Let this be a lesson for others. - */ -void pinmux_select_uart(void); - -/* - * Signal that we are about the use the SPI bus. - */ -void pinmux_select_spi(void); - -#else /* not CONFIG_SPI_UART_SWITCH */ - -static inline void pinmux_select_uart(void) {} -static inline void pinmux_select_spi(void) {} - -#endif - -#endif |