diff options
Diffstat (limited to 'kernel/arch/arm/mach-imx/clk-imx1.c')
| -rw-r--r-- | kernel/arch/arm/mach-imx/clk-imx1.c | 117 |
1 files changed, 117 insertions, 0 deletions
diff --git a/kernel/arch/arm/mach-imx/clk-imx1.c b/kernel/arch/arm/mach-imx/clk-imx1.c new file mode 100644 index 000000000..37c307a8d --- /dev/null +++ b/kernel/arch/arm/mach-imx/clk-imx1.c @@ -0,0 +1,117 @@ +/* + * Copyright (C) 2008 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix + * + * 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., + * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. + */ + +#include <linux/clk.h> +#include <linux/clkdev.h> +#include <linux/clk-provider.h> +#include <linux/err.h> +#include <linux/init.h> +#include <linux/of.h> +#include <linux/of_address.h> +#include <dt-bindings/clock/imx1-clock.h> + +#include "clk.h" +#include "common.h" +#include "hardware.h" + +static const char *prem_sel_clks[] = { "clk32_premult", "clk16m", }; +static const char *clko_sel_clks[] = { "per1", "hclk", "clk48m", "clk16m", + "prem", "fclk", }; + +static struct clk *clk[IMX1_CLK_MAX]; +static struct clk_onecell_data clk_data; + +static void __iomem *ccm __initdata; +#define CCM_CSCR (ccm + 0x0000) +#define CCM_MPCTL0 (ccm + 0x0004) +#define CCM_SPCTL0 (ccm + 0x000c) +#define CCM_PCDR (ccm + 0x0020) +#define SCM_GCCR (ccm + 0x0810) + +static void __init _mx1_clocks_init(unsigned long fref) +{ + clk[IMX1_CLK_DUMMY] = imx_clk_fixed("dummy", 0); + clk[IMX1_CLK_CLK32] = imx_obtain_fixed_clock("clk32", fref); + clk[IMX1_CLK_CLK16M_EXT] = imx_clk_fixed("clk16m_ext", 16000000); + clk[IMX1_CLK_CLK16M] = imx_clk_gate("clk16m", "clk16m_ext", CCM_CSCR, 17); + clk[IMX1_CLK_CLK32_PREMULT] = imx_clk_fixed_factor("clk32_premult", "clk32", 512, 1); + clk[IMX1_CLK_PREM] = imx_clk_mux("prem", CCM_CSCR, 16, 1, prem_sel_clks, ARRAY_SIZE(prem_sel_clks)); + clk[IMX1_CLK_MPLL] = imx_clk_pllv1("mpll", "clk32_premult", CCM_MPCTL0); + clk[IMX1_CLK_MPLL_GATE] = imx_clk_gate("mpll_gate", "mpll", CCM_CSCR, 0); + clk[IMX1_CLK_SPLL] = imx_clk_pllv1("spll", "prem", CCM_SPCTL0); + clk[IMX1_CLK_SPLL_GATE] = imx_clk_gate("spll_gate", "spll", CCM_CSCR, 1); + clk[IMX1_CLK_MCU] = imx_clk_divider("mcu", "clk32_premult", CCM_CSCR, 15, 1); + clk[IMX1_CLK_FCLK] = imx_clk_divider("fclk", "mpll_gate", CCM_CSCR, 15, 1); + clk[IMX1_CLK_HCLK] = imx_clk_divider("hclk", "spll_gate", CCM_CSCR, 10, 4); + clk[IMX1_CLK_CLK48M] = imx_clk_divider("clk48m", "spll_gate", CCM_CSCR, 26, 3); + clk[IMX1_CLK_PER1] = imx_clk_divider("per1", "spll_gate", CCM_PCDR, 0, 4); + clk[IMX1_CLK_PER2] = imx_clk_divider("per2", "spll_gate", CCM_PCDR, 4, 4); + clk[IMX1_CLK_PER3] = imx_clk_divider("per3", "spll_gate", CCM_PCDR, 16, 7); + clk[IMX1_CLK_CLKO] = imx_clk_mux("clko", CCM_CSCR, 29, 3, clko_sel_clks, ARRAY_SIZE(clko_sel_clks)); + clk[IMX1_CLK_UART3_GATE] = imx_clk_gate("uart3_gate", "hclk", SCM_GCCR, 6); + clk[IMX1_CLK_SSI2_GATE] = imx_clk_gate("ssi2_gate", "hclk", SCM_GCCR, 5); + clk[IMX1_CLK_BROM_GATE] = imx_clk_gate("brom_gate", "hclk", SCM_GCCR, 4); + clk[IMX1_CLK_DMA_GATE] = imx_clk_gate("dma_gate", "hclk", SCM_GCCR, 3); + clk[IMX1_CLK_CSI_GATE] = imx_clk_gate("csi_gate", "hclk", SCM_GCCR, 2); + clk[IMX1_CLK_MMA_GATE] = imx_clk_gate("mma_gate", "hclk", SCM_GCCR, 1); + clk[IMX1_CLK_USBD_GATE] = imx_clk_gate("usbd_gate", "clk48m", SCM_GCCR, 0); + + imx_check_clocks(clk, ARRAY_SIZE(clk)); +} + +int __init mx1_clocks_init(unsigned long fref) +{ + ccm = MX1_IO_ADDRESS(MX1_CCM_BASE_ADDR); + + _mx1_clocks_init(fref); + + clk_register_clkdev(clk[IMX1_CLK_PER1], "per", "imx-gpt.0"); + clk_register_clkdev(clk[IMX1_CLK_HCLK], "ipg", "imx-gpt.0"); + clk_register_clkdev(clk[IMX1_CLK_DMA_GATE], "ahb", "imx1-dma"); + clk_register_clkdev(clk[IMX1_CLK_HCLK], "ipg", "imx1-dma"); + clk_register_clkdev(clk[IMX1_CLK_PER1], "per", "imx1-uart.0"); + clk_register_clkdev(clk[IMX1_CLK_HCLK], "ipg", "imx1-uart.0"); + clk_register_clkdev(clk[IMX1_CLK_PER1], "per", "imx1-uart.1"); + clk_register_clkdev(clk[IMX1_CLK_HCLK], "ipg", "imx1-uart.1"); + clk_register_clkdev(clk[IMX1_CLK_PER1], "per", "imx1-uart.2"); + clk_register_clkdev(clk[IMX1_CLK_UART3_GATE], "ipg", "imx1-uart.2"); + clk_register_clkdev(clk[IMX1_CLK_HCLK], NULL, "imx1-i2c.0"); + clk_register_clkdev(clk[IMX1_CLK_PER2], "per", "imx1-cspi.0"); + clk_register_clkdev(clk[IMX1_CLK_DUMMY], "ipg", "imx1-cspi.0"); + clk_register_clkdev(clk[IMX1_CLK_PER2], "per", "imx1-cspi.1"); + clk_register_clkdev(clk[IMX1_CLK_DUMMY], "ipg", "imx1-cspi.1"); + clk_register_clkdev(clk[IMX1_CLK_PER2], "per", "imx1-fb.0"); + clk_register_clkdev(clk[IMX1_CLK_DUMMY], "ipg", "imx1-fb.0"); + clk_register_clkdev(clk[IMX1_CLK_DUMMY], "ahb", "imx1-fb.0"); + + mxc_timer_init(MX1_IO_ADDRESS(MX1_TIM1_BASE_ADDR), MX1_TIM1_INT); + + return 0; +} + +static void __init mx1_clocks_init_dt(struct device_node *np) +{ + ccm = of_iomap(np, 0); + BUG_ON(!ccm); + + _mx1_clocks_init(32768); + + clk_data.clks = clk; + clk_data.clk_num = ARRAY_SIZE(clk); + of_clk_add_provider(np, of_clk_src_onecell_get, &clk_data); +} +CLK_OF_DECLARE(imx1_ccm, "fsl,imx1-ccm", mx1_clocks_init_dt); |