diff options
Diffstat (limited to 'arch/arm/mach-imx/clk-imx1.c')
| -rw-r--r-- | arch/arm/mach-imx/clk-imx1.c | 151 |
1 files changed, 77 insertions, 74 deletions
diff --git a/arch/arm/mach-imx/clk-imx1.c b/arch/arm/mach-imx/clk-imx1.c index 7f739be3de2c..37c307a8d896 100644 --- a/arch/arm/mach-imx/clk-imx1.c +++ b/arch/arm/mach-imx/clk-imx1.c @@ -15,100 +15,103 @@ * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. */ -#include <linux/kernel.h> -#include <linux/init.h> #include <linux/clk.h> -#include <linux/io.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" -/* CCM register addresses */ -#define IO_ADDR_CCM(off) (MX1_IO_ADDRESS(MX1_CCM_BASE_ADDR + (off))) - -#define CCM_CSCR IO_ADDR_CCM(0x0) -#define CCM_MPCTL0 IO_ADDR_CCM(0x4) -#define CCM_SPCTL0 IO_ADDR_CCM(0xc) -#define CCM_PCDR IO_ADDR_CCM(0x20) - -/* SCM register addresses */ -#define IO_ADDR_SCM(off) (MX1_IO_ADDRESS(MX1_SCM_BASE_ADDR + (off))) - -#define SCM_GCCR IO_ADDR_SCM(0xc) - static const char *prem_sel_clks[] = { "clk32_premult", "clk16m", }; static const char *clko_sel_clks[] = { "per1", "hclk", "clk48m", "clk16m", "prem", "fclk", }; -enum imx1_clks { - dummy, clk32, clk16m_ext, clk16m, clk32_premult, prem, mpll, mpll_gate, - spll, spll_gate, mcu, fclk, hclk, clk48m, per1, per2, per3, clko, - uart3_gate, ssi2_gate, brom_gate, dma_gate, csi_gate, mma_gate, - usbd_gate, clk_max -}; +static struct clk *clk[IMX1_CLK_MAX]; +static struct clk_onecell_data clk_data; -static struct clk *clk[clk_max]; +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) -int __init mx1_clocks_init(unsigned long fref) +static void __init _mx1_clocks_init(unsigned long fref) { - int i; + 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)); +} - clk[dummy] = imx_clk_fixed("dummy", 0); - clk[clk32] = imx_clk_fixed("clk32", fref); - clk[clk16m_ext] = imx_clk_fixed("clk16m_ext", 16000000); - clk[clk16m] = imx_clk_gate("clk16m", "clk16m_ext", CCM_CSCR, 17); - clk[clk32_premult] = imx_clk_fixed_factor("clk32_premult", "clk32", 512, 1); - clk[prem] = imx_clk_mux("prem", CCM_CSCR, 16, 1, prem_sel_clks, - ARRAY_SIZE(prem_sel_clks)); - clk[mpll] = imx_clk_pllv1("mpll", "clk32_premult", CCM_MPCTL0); - clk[mpll_gate] = imx_clk_gate("mpll_gate", "mpll", CCM_CSCR, 0); - clk[spll] = imx_clk_pllv1("spll", "prem", CCM_SPCTL0); - clk[spll_gate] = imx_clk_gate("spll_gate", "spll", CCM_CSCR, 1); - clk[mcu] = imx_clk_divider("mcu", "clk32_premult", CCM_CSCR, 15, 1); - clk[fclk] = imx_clk_divider("fclk", "mpll_gate", CCM_CSCR, 15, 1); - clk[hclk] = imx_clk_divider("hclk", "spll_gate", CCM_CSCR, 10, 4); - clk[clk48m] = imx_clk_divider("clk48m", "spll_gate", CCM_CSCR, 26, 3); - clk[per1] = imx_clk_divider("per1", "spll_gate", CCM_PCDR, 0, 4); - clk[per2] = imx_clk_divider("per2", "spll_gate", CCM_PCDR, 4, 4); - clk[per3] = imx_clk_divider("per3", "spll_gate", CCM_PCDR, 16, 7); - clk[clko] = imx_clk_mux("clko", CCM_CSCR, 29, 3, clko_sel_clks, - ARRAY_SIZE(clko_sel_clks)); - clk[uart3_gate] = imx_clk_gate("uart3_gate", "hclk", SCM_GCCR, 6); - clk[ssi2_gate] = imx_clk_gate("ssi2_gate", "hclk", SCM_GCCR, 5); - clk[brom_gate] = imx_clk_gate("brom_gate", "hclk", SCM_GCCR, 4); - clk[dma_gate] = imx_clk_gate("dma_gate", "hclk", SCM_GCCR, 3); - clk[csi_gate] = imx_clk_gate("csi_gate", "hclk", SCM_GCCR, 2); - clk[mma_gate] = imx_clk_gate("mma_gate", "hclk", SCM_GCCR, 1); - clk[usbd_gate] = imx_clk_gate("usbd_gate", "clk48m", SCM_GCCR, 0); +int __init mx1_clocks_init(unsigned long fref) +{ + ccm = MX1_IO_ADDRESS(MX1_CCM_BASE_ADDR); - for (i = 0; i < ARRAY_SIZE(clk); i++) - if (IS_ERR(clk[i])) - pr_err("imx1 clk %d: register failed with %ld\n", - i, PTR_ERR(clk[i])); + _mx1_clocks_init(fref); - clk_register_clkdev(clk[dma_gate], "ahb", "imx1-dma"); - clk_register_clkdev(clk[hclk], "ipg", "imx1-dma"); - clk_register_clkdev(clk[per1], "per", "imx-gpt.0"); - clk_register_clkdev(clk[hclk], "ipg", "imx-gpt.0"); - clk_register_clkdev(clk[per1], "per", "imx1-uart.0"); - clk_register_clkdev(clk[hclk], "ipg", "imx1-uart.0"); - clk_register_clkdev(clk[per1], "per", "imx1-uart.1"); - clk_register_clkdev(clk[hclk], "ipg", "imx1-uart.1"); - clk_register_clkdev(clk[per1], "per", "imx1-uart.2"); - clk_register_clkdev(clk[uart3_gate], "ipg", "imx1-uart.2"); - clk_register_clkdev(clk[hclk], NULL, "imx1-i2c.0"); - clk_register_clkdev(clk[per2], "per", "imx1-cspi.0"); - clk_register_clkdev(clk[dummy], "ipg", "imx1-cspi.0"); - clk_register_clkdev(clk[per2], "per", "imx1-cspi.1"); - clk_register_clkdev(clk[dummy], "ipg", "imx1-cspi.1"); - clk_register_clkdev(clk[per2], "per", "imx1-fb.0"); - clk_register_clkdev(clk[dummy], "ipg", "imx1-fb.0"); - clk_register_clkdev(clk[dummy], "ahb", "imx1-fb.0"); + 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); |