ARM: clk: add clk-asm9260 driver
Provide CLK support for Alphascale ASM9260 SoC. Signed-off-by: Oleksij Rempel <linux@rempel-privat.de> Signed-off-by: Michael Turquette <mturquette@linaro.org>
This commit is contained in:
Oleksij Rempel
Michael Turquette
parent
edc30077c9
commit
ec6415dc41
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@ -16,6 +16,7 @@ endif
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# hardware specific clock types
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# please keep this section sorted lexicographically by file/directory path name
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obj-$(CONFIG_MACH_ASM9260) += clk-asm9260.o
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obj-$(CONFIG_COMMON_CLK_AXI_CLKGEN) += clk-axi-clkgen.o
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obj-$(CONFIG_ARCH_AXXIA) += clk-axm5516.o
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obj-$(CONFIG_ARCH_BCM2835) += clk-bcm2835.o
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@ -0,0 +1,348 @@
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/*
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* Copyright (c) 2014 Oleksij Rempel <linux@rempel-privat.de>.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <linux/clk.h>
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#include <linux/clkdev.h>
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#include <linux/err.h>
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#include <linux/io.h>
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#include <linux/clk-provider.h>
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#include <linux/spinlock.h>
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#include <linux/of.h>
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#include <linux/of_address.h>
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#include <dt-bindings/clock/alphascale,asm9260.h>
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#define HW_AHBCLKCTRL0 0x0020
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#define HW_AHBCLKCTRL1 0x0030
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#define HW_SYSPLLCTRL 0x0100
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#define HW_MAINCLKSEL 0x0120
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#define HW_MAINCLKUEN 0x0124
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#define HW_UARTCLKSEL 0x0128
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#define HW_UARTCLKUEN 0x012c
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#define HW_I2S0CLKSEL 0x0130
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#define HW_I2S0CLKUEN 0x0134
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#define HW_I2S1CLKSEL 0x0138
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#define HW_I2S1CLKUEN 0x013c
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#define HW_WDTCLKSEL 0x0160
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#define HW_WDTCLKUEN 0x0164
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#define HW_CLKOUTCLKSEL 0x0170
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#define HW_CLKOUTCLKUEN 0x0174
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#define HW_CPUCLKDIV 0x017c
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#define HW_SYSAHBCLKDIV 0x0180
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#define HW_I2S0MCLKDIV 0x0190
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#define HW_I2S0SCLKDIV 0x0194
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#define HW_I2S1MCLKDIV 0x0188
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#define HW_I2S1SCLKDIV 0x018c
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#define HW_UART0CLKDIV 0x0198
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#define HW_UART1CLKDIV 0x019c
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#define HW_UART2CLKDIV 0x01a0
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#define HW_UART3CLKDIV 0x01a4
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#define HW_UART4CLKDIV 0x01a8
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#define HW_UART5CLKDIV 0x01ac
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#define HW_UART6CLKDIV 0x01b0
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#define HW_UART7CLKDIV 0x01b4
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#define HW_UART8CLKDIV 0x01b8
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#define HW_UART9CLKDIV 0x01bc
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#define HW_SPI0CLKDIV 0x01c0
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#define HW_SPI1CLKDIV 0x01c4
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#define HW_QUADSPICLKDIV 0x01c8
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#define HW_SSP0CLKDIV 0x01d0
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#define HW_NANDCLKDIV 0x01d4
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#define HW_TRACECLKDIV 0x01e0
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#define HW_CAMMCLKDIV 0x01e8
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#define HW_WDTCLKDIV 0x01ec
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#define HW_CLKOUTCLKDIV 0x01f4
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#define HW_MACCLKDIV 0x01f8
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#define HW_LCDCLKDIV 0x01fc
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#define HW_ADCANACLKDIV 0x0200
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static struct clk *clks[MAX_CLKS];
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static struct clk_onecell_data clk_data;
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static DEFINE_SPINLOCK(asm9260_clk_lock);
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struct asm9260_div_clk {
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unsigned int idx;
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const char *name;
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const char *parent_name;
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u32 reg;
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};
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struct asm9260_gate_data {
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unsigned int idx;
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const char *name;
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const char *parent_name;
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u32 reg;
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u8 bit_idx;
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unsigned long flags;
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};
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struct asm9260_mux_clock {
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u8 mask;
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u32 *table;
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const char *name;
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const char **parent_names;
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u8 num_parents;
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unsigned long offset;
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unsigned long flags;
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};
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static void __iomem *base;
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static const struct asm9260_div_clk asm9260_div_clks[] __initconst = {
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{ CLKID_SYS_CPU, "cpu_div", "main_gate", HW_CPUCLKDIV },
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{ CLKID_SYS_AHB, "ahb_div", "cpu_div", HW_SYSAHBCLKDIV },
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/* i2s has two deviders: one for only external mclk and internal
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* devider for all clks. */
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{ CLKID_SYS_I2S0M, "i2s0m_div", "i2s0_mclk", HW_I2S0MCLKDIV },
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{ CLKID_SYS_I2S1M, "i2s1m_div", "i2s1_mclk", HW_I2S1MCLKDIV },
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{ CLKID_SYS_I2S0S, "i2s0s_div", "i2s0_gate", HW_I2S0SCLKDIV },
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{ CLKID_SYS_I2S1S, "i2s1s_div", "i2s0_gate", HW_I2S1SCLKDIV },
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{ CLKID_SYS_UART0, "uart0_div", "uart_gate", HW_UART0CLKDIV },
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{ CLKID_SYS_UART1, "uart1_div", "uart_gate", HW_UART1CLKDIV },
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{ CLKID_SYS_UART2, "uart2_div", "uart_gate", HW_UART2CLKDIV },
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{ CLKID_SYS_UART3, "uart3_div", "uart_gate", HW_UART3CLKDIV },
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{ CLKID_SYS_UART4, "uart4_div", "uart_gate", HW_UART4CLKDIV },
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{ CLKID_SYS_UART5, "uart5_div", "uart_gate", HW_UART5CLKDIV },
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{ CLKID_SYS_UART6, "uart6_div", "uart_gate", HW_UART6CLKDIV },
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{ CLKID_SYS_UART7, "uart7_div", "uart_gate", HW_UART7CLKDIV },
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{ CLKID_SYS_UART8, "uart8_div", "uart_gate", HW_UART8CLKDIV },
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{ CLKID_SYS_UART9, "uart9_div", "uart_gate", HW_UART9CLKDIV },
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{ CLKID_SYS_SPI0, "spi0_div", "main_gate", HW_SPI0CLKDIV },
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{ CLKID_SYS_SPI1, "spi1_div", "main_gate", HW_SPI1CLKDIV },
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{ CLKID_SYS_QUADSPI, "quadspi_div", "main_gate", HW_QUADSPICLKDIV },
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{ CLKID_SYS_SSP0, "ssp0_div", "main_gate", HW_SSP0CLKDIV },
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{ CLKID_SYS_NAND, "nand_div", "main_gate", HW_NANDCLKDIV },
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{ CLKID_SYS_TRACE, "trace_div", "main_gate", HW_TRACECLKDIV },
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{ CLKID_SYS_CAMM, "camm_div", "main_gate", HW_CAMMCLKDIV },
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{ CLKID_SYS_MAC, "mac_div", "main_gate", HW_MACCLKDIV },
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{ CLKID_SYS_LCD, "lcd_div", "main_gate", HW_LCDCLKDIV },
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{ CLKID_SYS_ADCANA, "adcana_div", "main_gate", HW_ADCANACLKDIV },
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{ CLKID_SYS_WDT, "wdt_div", "wdt_gate", HW_WDTCLKDIV },
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{ CLKID_SYS_CLKOUT, "clkout_div", "clkout_gate", HW_CLKOUTCLKDIV },
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};
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static const struct asm9260_gate_data asm9260_mux_gates[] __initconst = {
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{ 0, "main_gate", "main_mux", HW_MAINCLKUEN, 0 },
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{ 0, "uart_gate", "uart_mux", HW_UARTCLKUEN, 0 },
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{ 0, "i2s0_gate", "i2s0_mux", HW_I2S0CLKUEN, 0 },
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{ 0, "i2s1_gate", "i2s1_mux", HW_I2S1CLKUEN, 0 },
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{ 0, "wdt_gate", "wdt_mux", HW_WDTCLKUEN, 0 },
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{ 0, "clkout_gate", "clkout_mux", HW_CLKOUTCLKUEN, 0 },
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};
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static const struct asm9260_gate_data asm9260_ahb_gates[] __initconst = {
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/* ahb gates */
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{ CLKID_AHB_ROM, "rom", "ahb_div",
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HW_AHBCLKCTRL0, 1, CLK_IGNORE_UNUSED},
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{ CLKID_AHB_RAM, "ram", "ahb_div",
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HW_AHBCLKCTRL0, 2, CLK_IGNORE_UNUSED},
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{ CLKID_AHB_GPIO, "gpio", "ahb_div",
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HW_AHBCLKCTRL0, 4 },
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{ CLKID_AHB_MAC, "mac", "ahb_div",
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HW_AHBCLKCTRL0, 5 },
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{ CLKID_AHB_EMI, "emi", "ahb_div",
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HW_AHBCLKCTRL0, 6, CLK_IGNORE_UNUSED},
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{ CLKID_AHB_USB0, "usb0", "ahb_div",
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HW_AHBCLKCTRL0, 7 },
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{ CLKID_AHB_USB1, "usb1", "ahb_div",
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HW_AHBCLKCTRL0, 8 },
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{ CLKID_AHB_DMA0, "dma0", "ahb_div",
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HW_AHBCLKCTRL0, 9 },
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{ CLKID_AHB_DMA1, "dma1", "ahb_div",
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HW_AHBCLKCTRL0, 10 },
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{ CLKID_AHB_UART0, "uart0", "ahb_div",
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HW_AHBCLKCTRL0, 11 },
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{ CLKID_AHB_UART1, "uart1", "ahb_div",
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HW_AHBCLKCTRL0, 12 },
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{ CLKID_AHB_UART2, "uart2", "ahb_div",
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HW_AHBCLKCTRL0, 13 },
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{ CLKID_AHB_UART3, "uart3", "ahb_div",
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HW_AHBCLKCTRL0, 14 },
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{ CLKID_AHB_UART4, "uart4", "ahb_div",
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HW_AHBCLKCTRL0, 15 },
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{ CLKID_AHB_UART5, "uart5", "ahb_div",
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HW_AHBCLKCTRL0, 16 },
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{ CLKID_AHB_UART6, "uart6", "ahb_div",
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HW_AHBCLKCTRL0, 17 },
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{ CLKID_AHB_UART7, "uart7", "ahb_div",
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HW_AHBCLKCTRL0, 18 },
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{ CLKID_AHB_UART8, "uart8", "ahb_div",
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HW_AHBCLKCTRL0, 19 },
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{ CLKID_AHB_UART9, "uart9", "ahb_div",
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HW_AHBCLKCTRL0, 20 },
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{ CLKID_AHB_I2S0, "i2s0", "ahb_div",
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HW_AHBCLKCTRL0, 21 },
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{ CLKID_AHB_I2C0, "i2c0", "ahb_div",
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HW_AHBCLKCTRL0, 22 },
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{ CLKID_AHB_I2C1, "i2c1", "ahb_div",
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HW_AHBCLKCTRL0, 23 },
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{ CLKID_AHB_SSP0, "ssp0", "ahb_div",
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HW_AHBCLKCTRL0, 24 },
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{ CLKID_AHB_IOCONFIG, "ioconf", "ahb_div",
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HW_AHBCLKCTRL0, 25 },
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{ CLKID_AHB_WDT, "wdt", "ahb_div",
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HW_AHBCLKCTRL0, 26 },
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{ CLKID_AHB_CAN0, "can0", "ahb_div",
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HW_AHBCLKCTRL0, 27 },
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{ CLKID_AHB_CAN1, "can1", "ahb_div",
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HW_AHBCLKCTRL0, 28 },
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{ CLKID_AHB_MPWM, "mpwm", "ahb_div",
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HW_AHBCLKCTRL0, 29 },
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{ CLKID_AHB_SPI0, "spi0", "ahb_div",
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HW_AHBCLKCTRL0, 30 },
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{ CLKID_AHB_SPI1, "spi1", "ahb_div",
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HW_AHBCLKCTRL0, 31 },
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{ CLKID_AHB_QEI, "qei", "ahb_div",
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HW_AHBCLKCTRL1, 0 },
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{ CLKID_AHB_QUADSPI0, "quadspi0", "ahb_div",
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HW_AHBCLKCTRL1, 1 },
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{ CLKID_AHB_CAMIF, "capmif", "ahb_div",
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HW_AHBCLKCTRL1, 2 },
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{ CLKID_AHB_LCDIF, "lcdif", "ahb_div",
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HW_AHBCLKCTRL1, 3 },
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{ CLKID_AHB_TIMER0, "timer0", "ahb_div",
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HW_AHBCLKCTRL1, 4 },
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{ CLKID_AHB_TIMER1, "timer1", "ahb_div",
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HW_AHBCLKCTRL1, 5 },
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{ CLKID_AHB_TIMER2, "timer2", "ahb_div",
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HW_AHBCLKCTRL1, 6 },
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{ CLKID_AHB_TIMER3, "timer3", "ahb_div",
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HW_AHBCLKCTRL1, 7 },
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{ CLKID_AHB_IRQ, "irq", "ahb_div",
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HW_AHBCLKCTRL1, 8, CLK_IGNORE_UNUSED},
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{ CLKID_AHB_RTC, "rtc", "ahb_div",
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HW_AHBCLKCTRL1, 9 },
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{ CLKID_AHB_NAND, "nand", "ahb_div",
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HW_AHBCLKCTRL1, 10 },
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{ CLKID_AHB_ADC0, "adc0", "ahb_div",
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HW_AHBCLKCTRL1, 11 },
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{ CLKID_AHB_LED, "led", "ahb_div",
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HW_AHBCLKCTRL1, 12 },
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{ CLKID_AHB_DAC0, "dac0", "ahb_div",
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HW_AHBCLKCTRL1, 13 },
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{ CLKID_AHB_LCD, "lcd", "ahb_div",
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HW_AHBCLKCTRL1, 14 },
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{ CLKID_AHB_I2S1, "i2s1", "ahb_div",
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HW_AHBCLKCTRL1, 15 },
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{ CLKID_AHB_MAC1, "mac1", "ahb_div",
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HW_AHBCLKCTRL1, 16 },
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};
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static const char __initdata *main_mux_p[] = { NULL, NULL };
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static const char __initdata *i2s0_mux_p[] = { NULL, NULL, "i2s0m_div"};
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static const char __initdata *i2s1_mux_p[] = { NULL, NULL, "i2s1m_div"};
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static const char __initdata *clkout_mux_p[] = { NULL, NULL, "rtc"};
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static u32 three_mux_table[] = {0, 1, 3};
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static struct asm9260_mux_clock asm9260_mux_clks[] __initdata = {
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{ 1, three_mux_table, "main_mux", main_mux_p,
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ARRAY_SIZE(main_mux_p), HW_MAINCLKSEL, },
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{ 1, three_mux_table, "uart_mux", main_mux_p,
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ARRAY_SIZE(main_mux_p), HW_UARTCLKSEL, },
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{ 1, three_mux_table, "wdt_mux", main_mux_p,
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ARRAY_SIZE(main_mux_p), HW_WDTCLKSEL, },
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{ 3, three_mux_table, "i2s0_mux", i2s0_mux_p,
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ARRAY_SIZE(i2s0_mux_p), HW_I2S0CLKSEL, },
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{ 3, three_mux_table, "i2s1_mux", i2s1_mux_p,
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ARRAY_SIZE(i2s1_mux_p), HW_I2S1CLKSEL, },
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{ 3, three_mux_table, "clkout_mux", clkout_mux_p,
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ARRAY_SIZE(clkout_mux_p), HW_CLKOUTCLKSEL, },
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};
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static void __init asm9260_acc_init(struct device_node *np)
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{
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struct clk *clk;
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const char *ref_clk, *pll_clk = "pll";
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u32 rate;
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int n;
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u32 accuracy = 0;
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base = of_io_request_and_map(np, 0, np->name);
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if (!base)
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panic("%s: unable to map resource", np->name);
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/* register pll */
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rate = (ioread32(base + HW_SYSPLLCTRL) & 0xffff) * 1000000;
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ref_clk = of_clk_get_parent_name(np, 0);
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accuracy = clk_get_accuracy(__clk_lookup(ref_clk));
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clk = clk_register_fixed_rate_with_accuracy(NULL, pll_clk,
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ref_clk, 0, rate, accuracy);
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if (IS_ERR(clk))
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panic("%s: can't register REFCLK. Check DT!", np->name);
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for (n = 0; n < ARRAY_SIZE(asm9260_mux_clks); n++) {
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const struct asm9260_mux_clock *mc = &asm9260_mux_clks[n];
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mc->parent_names[0] = ref_clk;
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mc->parent_names[1] = pll_clk;
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clk = clk_register_mux_table(NULL, mc->name, mc->parent_names,
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mc->num_parents, mc->flags, base + mc->offset,
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0, mc->mask, 0, mc->table, &asm9260_clk_lock);
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}
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/* clock mux gate cells */
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for (n = 0; n < ARRAY_SIZE(asm9260_mux_gates); n++) {
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const struct asm9260_gate_data *gd = &asm9260_mux_gates[n];
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clk = clk_register_gate(NULL, gd->name,
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gd->parent_name, gd->flags | CLK_SET_RATE_PARENT,
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base + gd->reg, gd->bit_idx, 0, &asm9260_clk_lock);
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}
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/* clock div cells */
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for (n = 0; n < ARRAY_SIZE(asm9260_div_clks); n++) {
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const struct asm9260_div_clk *dc = &asm9260_div_clks[n];
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clks[dc->idx] = clk_register_divider(NULL, dc->name,
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dc->parent_name, CLK_SET_RATE_PARENT,
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base + dc->reg, 0, 8, CLK_DIVIDER_ONE_BASED,
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&asm9260_clk_lock);
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}
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/* clock ahb gate cells */
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for (n = 0; n < ARRAY_SIZE(asm9260_ahb_gates); n++) {
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const struct asm9260_gate_data *gd = &asm9260_ahb_gates[n];
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clks[gd->idx] = clk_register_gate(NULL, gd->name,
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gd->parent_name, gd->flags, base + gd->reg,
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gd->bit_idx, 0, &asm9260_clk_lock);
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}
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/* check for errors on leaf clocks */
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for (n = 0; n < MAX_CLKS; n++) {
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if (!IS_ERR(clks[n]))
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continue;
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pr_err("%s: Unable to register leaf clock %d\n",
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np->full_name, n);
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goto fail;
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}
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/* register clk-provider */
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clk_data.clks = clks;
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clk_data.clk_num = MAX_CLKS;
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of_clk_add_provider(np, of_clk_src_onecell_get, &clk_data);
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return;
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||||
fail:
|
||||
iounmap(base);
|
||||
}
|
||||
CLK_OF_DECLARE(asm9260_acc, "alphascale,asm9260-clock-controller",
|
||||
asm9260_acc_init);
|
||||
|
|
@ -0,0 +1,97 @@
|
|||
/*
|
||||
* Copyright 2014 Oleksij Rempel <linux@rempel-privat.de>
|
||||
*
|
||||
* This software is licensed under the terms of the GNU General Public
|
||||
* License version 2, as published by the Free Software Foundation, and
|
||||
* may be copied, distributed, and modified under those terms.
|
||||
*
|
||||
* 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.
|
||||
*/
|
||||
|
||||
#ifndef _DT_BINDINGS_CLK_ASM9260_H
|
||||
#define _DT_BINDINGS_CLK_ASM9260_H
|
||||
|
||||
/* ahb gate */
|
||||
#define CLKID_AHB_ROM 0
|
||||
#define CLKID_AHB_RAM 1
|
||||
#define CLKID_AHB_GPIO 2
|
||||
#define CLKID_AHB_MAC 3
|
||||
#define CLKID_AHB_EMI 4
|
||||
#define CLKID_AHB_USB0 5
|
||||
#define CLKID_AHB_USB1 6
|
||||
#define CLKID_AHB_DMA0 7
|
||||
#define CLKID_AHB_DMA1 8
|
||||
#define CLKID_AHB_UART0 9
|
||||
#define CLKID_AHB_UART1 10
|
||||
#define CLKID_AHB_UART2 11
|
||||
#define CLKID_AHB_UART3 12
|
||||
#define CLKID_AHB_UART4 13
|
||||
#define CLKID_AHB_UART5 14
|
||||
#define CLKID_AHB_UART6 15
|
||||
#define CLKID_AHB_UART7 16
|
||||
#define CLKID_AHB_UART8 17
|
||||
#define CLKID_AHB_UART9 18
|
||||
#define CLKID_AHB_I2S0 19
|
||||
#define CLKID_AHB_I2C0 20
|
||||
#define CLKID_AHB_I2C1 21
|
||||
#define CLKID_AHB_SSP0 22
|
||||
#define CLKID_AHB_IOCONFIG 23
|
||||
#define CLKID_AHB_WDT 24
|
||||
#define CLKID_AHB_CAN0 25
|
||||
#define CLKID_AHB_CAN1 26
|
||||
#define CLKID_AHB_MPWM 27
|
||||
#define CLKID_AHB_SPI0 28
|
||||
#define CLKID_AHB_SPI1 29
|
||||
#define CLKID_AHB_QEI 30
|
||||
#define CLKID_AHB_QUADSPI0 31
|
||||
#define CLKID_AHB_CAMIF 32
|
||||
#define CLKID_AHB_LCDIF 33
|
||||
#define CLKID_AHB_TIMER0 34
|
||||
#define CLKID_AHB_TIMER1 35
|
||||
#define CLKID_AHB_TIMER2 36
|
||||
#define CLKID_AHB_TIMER3 37
|
||||
#define CLKID_AHB_IRQ 38
|
||||
#define CLKID_AHB_RTC 39
|
||||
#define CLKID_AHB_NAND 40
|
||||
#define CLKID_AHB_ADC0 41
|
||||
#define CLKID_AHB_LED 42
|
||||
#define CLKID_AHB_DAC0 43
|
||||
#define CLKID_AHB_LCD 44
|
||||
#define CLKID_AHB_I2S1 45
|
||||
#define CLKID_AHB_MAC1 46
|
||||
|
||||
/* devider */
|
||||
#define CLKID_SYS_CPU 47
|
||||
#define CLKID_SYS_AHB 48
|
||||
#define CLKID_SYS_I2S0M 49
|
||||
#define CLKID_SYS_I2S0S 50
|
||||
#define CLKID_SYS_I2S1M 51
|
||||
#define CLKID_SYS_I2S1S 52
|
||||
#define CLKID_SYS_UART0 53
|
||||
#define CLKID_SYS_UART1 54
|
||||
#define CLKID_SYS_UART2 55
|
||||
#define CLKID_SYS_UART3 56
|
||||
#define CLKID_SYS_UART4 56
|
||||
#define CLKID_SYS_UART5 57
|
||||
#define CLKID_SYS_UART6 58
|
||||
#define CLKID_SYS_UART7 59
|
||||
#define CLKID_SYS_UART8 60
|
||||
#define CLKID_SYS_UART9 61
|
||||
#define CLKID_SYS_SPI0 62
|
||||
#define CLKID_SYS_SPI1 63
|
||||
#define CLKID_SYS_QUADSPI 64
|
||||
#define CLKID_SYS_SSP0 65
|
||||
#define CLKID_SYS_NAND 66
|
||||
#define CLKID_SYS_TRACE 67
|
||||
#define CLKID_SYS_CAMM 68
|
||||
#define CLKID_SYS_WDT 69
|
||||
#define CLKID_SYS_CLKOUT 70
|
||||
#define CLKID_SYS_MAC 71
|
||||
#define CLKID_SYS_LCD 72
|
||||
#define CLKID_SYS_ADCANA 73
|
||||
|
||||
#define MAX_CLKS 74
|
||||
#endif
|
||||
Loading…
Reference in New Issue