[PATCH v4 05/10] ARM: clk: add clk-asm9260 driver
Oleksij Rempel
linux at rempel-privat.de
Sun Oct 12 12:19:16 PDT 2014
Provide CLK support for Alphascale ASM9260 SoC.
Signed-off-by: Oleksij Rempel <linux at rempel-privat.de>
---
drivers/clk/Makefile | 1 +
drivers/clk/clk-asm9260.c | 351 ++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 352 insertions(+)
create mode 100644 drivers/clk/clk-asm9260.c
diff --git a/drivers/clk/Makefile b/drivers/clk/Makefile
index f537a0b..45bbf22 100644
--- a/drivers/clk/Makefile
+++ b/drivers/clk/Makefile
@@ -43,6 +43,7 @@ obj-$(CONFIG_ARCH_HI3xxx) += hisilicon/
obj-$(CONFIG_ARCH_HIP04) += hisilicon/
obj-$(CONFIG_ARCH_HIX5HD2) += hisilicon/
obj-$(CONFIG_COMMON_CLK_KEYSTONE) += keystone/
+obj-$(CONFIG_MACH_ASM9260) += clk-asm9260.o
ifeq ($(CONFIG_COMMON_CLK), y)
obj-$(CONFIG_ARCH_MMP) += mmp/
endif
diff --git a/drivers/clk/clk-asm9260.c b/drivers/clk/clk-asm9260.c
new file mode 100644
index 0000000..9ef4e8d
--- /dev/null
+++ b/drivers/clk/clk-asm9260.c
@@ -0,0 +1,351 @@
+/*
+ * Copyright (c) 2014 Oleksij Rempel <linux at rempel-privat.de>.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/clk.h>
+#include <linux/clkdev.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/clk-provider.h>
+#include <linux/spinlock.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <dt-bindings/clock/alphascale,asm9260.h>
+
+#define HW_AHBCLKCTRL0 0x0020
+#define HW_AHBCLKCTRL1 0x0030
+#define HW_SYSPLLCTRL 0x0100
+#define HW_MAINCLKSEL 0x0120
+#define HW_MAINCLKUEN 0x0124
+#define HW_UARTCLKSEL 0x0128
+#define HW_UARTCLKUEN 0x012c
+#define HW_I2S0CLKSEL 0x0130
+#define HW_I2S0CLKUEN 0x0134
+#define HW_I2S1CLKSEL 0x0138
+#define HW_I2S1CLKUEN 0x013c
+#define HW_WDTCLKSEL 0x0160
+#define HW_WDTCLKUEN 0x0164
+#define HW_CLKOUTCLKSEL 0x0170
+#define HW_CLKOUTCLKUEN 0x0174
+#define HW_CPUCLKDIV 0x017c
+#define HW_SYSAHBCLKDIV 0x0180
+#define HW_I2S0MCLKDIV 0x0190
+#define HW_I2S0SCLKDIV 0x0194
+#define HW_I2S1MCLKDIV 0x0188
+#define HW_I2S1SCLKDIV 0x018c
+#define HW_UART0CLKDIV 0x0198
+#define HW_UART1CLKDIV 0x019c
+#define HW_UART2CLKDIV 0x01a0
+#define HW_UART3CLKDIV 0x01a4
+#define HW_UART4CLKDIV 0x01a8
+#define HW_UART5CLKDIV 0x01ac
+#define HW_UART6CLKDIV 0x01b0
+#define HW_UART7CLKDIV 0x01b4
+#define HW_UART8CLKDIV 0x01b8
+#define HW_UART9CLKDIV 0x01bc
+#define HW_SPI0CLKDIV 0x01c0
+#define HW_SPI1CLKDIV 0x01c4
+#define HW_QUADSPICLKDIV 0x01c8
+#define HW_SSP0CLKDIV 0x01d0
+#define HW_NANDCLKDIV 0x01d4
+#define HW_TRACECLKDIV 0x01e0
+#define HW_CAMMCLKDIV 0x01e8
+#define HW_WDTCLKDIV 0x01ec
+#define HW_CLKOUTCLKDIV 0x01f4
+#define HW_MACCLKDIV 0x01f8
+#define HW_LCDCLKDIV 0x01fc
+#define HW_ADCANACLKDIV 0x0200
+
+static struct clk *clks[MAX_CLKS];
+static struct clk_onecell_data clk_data;
+static DEFINE_SPINLOCK(asm9260_clk_lock);
+
+struct asm9260_div_clk {
+ unsigned int idx;
+ const char *name;
+ const char *parent_name;
+ u32 reg;
+};
+
+struct asm9260_gate_data {
+ unsigned int idx;
+ const char *name;
+ const char *parent_name;
+ u32 reg;
+ u8 bit_idx;
+ unsigned long flags;
+};
+
+struct asm9260_mux_clock {
+ u8 mask;
+ u32 *table;
+ const char *name;
+ const char **parent_names;
+ u8 num_parents;
+ unsigned long offset;
+ unsigned long flags;
+};
+
+static void __iomem *base;
+
+enum {
+ REFCLK, SYSPLL, I2S0_MCLK, I2S1_MCLK, RTC_OSC, USB_PLL,
+};
+
+static const char *clk_names[] = {
+ [REFCLK] = "oscillator",
+ [SYSPLL] = "pll",
+ [I2S0_MCLK] = "i2s0_mclk",
+ [I2S1_MCLK] = "i2s1_mclk",
+ [RTC_OSC] = "rtc_osc",
+ [USB_PLL] = "usb_pll",
+};
+
+static const struct asm9260_div_clk asm9260_div_clks[] __initconst = {
+ { CLKID_SYS_CPU, "cpu_div", "main_gate", HW_CPUCLKDIV },
+ { CLKID_SYS_AHB, "ahb_div", "cpu_div", HW_SYSAHBCLKDIV },
+
+ /* i2s has two deviders: one for only external mclk and internal
+ * devider for all clks. */
+ { CLKID_SYS_I2S0M, "i2s0m_div", "i2s0_mclk", HW_I2S0MCLKDIV },
+ { CLKID_SYS_I2S1M, "i2s1m_div", "i2s1_mclk", HW_I2S1MCLKDIV },
+ { CLKID_SYS_I2S0S, "i2s0s_div", "i2s0_gate", HW_I2S0SCLKDIV },
+ { CLKID_SYS_I2S1S, "i2s1s_div", "i2s0_gate", HW_I2S1SCLKDIV },
+
+ { CLKID_SYS_UART0, "uart0_div", "uart_gate", HW_UART0CLKDIV },
+ { CLKID_SYS_UART1, "uart1_div", "uart_gate", HW_UART1CLKDIV },
+ { CLKID_SYS_UART2, "uart2_div", "uart_gate", HW_UART2CLKDIV },
+ { CLKID_SYS_UART3, "uart3_div", "uart_gate", HW_UART3CLKDIV },
+ { CLKID_SYS_UART4, "uart4_div", "uart_gate", HW_UART4CLKDIV },
+ { CLKID_SYS_UART5, "uart5_div", "uart_gate", HW_UART5CLKDIV },
+ { CLKID_SYS_UART6, "uart6_div", "uart_gate", HW_UART6CLKDIV },
+ { CLKID_SYS_UART7, "uart7_div", "uart_gate", HW_UART7CLKDIV },
+ { CLKID_SYS_UART8, "uart8_div", "uart_gate", HW_UART8CLKDIV },
+ { CLKID_SYS_UART9, "uart9_div", "uart_gate", HW_UART9CLKDIV },
+};
+
+static const struct asm9260_gate_data asm9260_mux_gates[] __initconst = {
+ { 0, "main_gate", "main_mux", HW_MAINCLKUEN, 0 },
+ { 0, "uart_gate", "uart_mux", HW_UARTCLKUEN, 0 },
+ { 0, "i2s0_gate", "i2s0_mux", HW_I2S0CLKUEN, 0 },
+ { 0, "i2s1_gate", "i2s1_mux", HW_I2S1CLKUEN, 0 },
+ { 0, "wdt_gate", "wdt_mux", HW_WDTCLKUEN, 0 },
+ { 0, "clkout_gate", "clkout_mux", HW_CLKOUTCLKUEN, 0 },
+};
+static const struct asm9260_gate_data asm9260_ahb_gates[] __initconst = {
+ /* ahb gates */
+ { CLKID_AHB_ROM, "rom", "ahb_div",
+ HW_AHBCLKCTRL0, 1, CLK_IGNORE_UNUSED},
+ { CLKID_AHB_RAM, "ram", "ahb_div",
+ HW_AHBCLKCTRL0, 2, CLK_IGNORE_UNUSED},
+ { CLKID_AHB_GPIO, "gpio", "ahb_div",
+ HW_AHBCLKCTRL0, 4 },
+ { CLKID_AHB_MAC, "mac", "ahb_div",
+ HW_AHBCLKCTRL0, 5 },
+ { CLKID_AHB_EMI, "emi", "ahb_div",
+ HW_AHBCLKCTRL0, 6, CLK_IGNORE_UNUSED},
+ { CLKID_AHB_USB0, "usb0", "ahb_div",
+ HW_AHBCLKCTRL0, 7 },
+ { CLKID_AHB_USB1, "usb1", "ahb_div",
+ HW_AHBCLKCTRL0, 8 },
+ { CLKID_AHB_DMA0, "dma0", "ahb_div",
+ HW_AHBCLKCTRL0, 9 },
+ { CLKID_AHB_DMA1, "dma1", "ahb_div",
+ HW_AHBCLKCTRL0, 10 },
+ { CLKID_AHB_UART0, "uart0", "ahb_div",
+ HW_AHBCLKCTRL0, 11 },
+ { CLKID_AHB_UART1, "uart1", "ahb_div",
+ HW_AHBCLKCTRL0, 12 },
+ { CLKID_AHB_UART2, "uart2", "ahb_div",
+ HW_AHBCLKCTRL0, 13 },
+ { CLKID_AHB_UART3, "uart3", "ahb_div",
+ HW_AHBCLKCTRL0, 14 },
+ { CLKID_AHB_UART4, "uart4", "ahb_div",
+ HW_AHBCLKCTRL0, 15 },
+ { CLKID_AHB_UART5, "uart5", "ahb_div",
+ HW_AHBCLKCTRL0, 16 },
+ { CLKID_AHB_UART6, "uart6", "ahb_div",
+ HW_AHBCLKCTRL0, 17 },
+ { CLKID_AHB_UART7, "uart7", "ahb_div",
+ HW_AHBCLKCTRL0, 18 },
+ { CLKID_AHB_UART8, "uart8", "ahb_div",
+ HW_AHBCLKCTRL0, 19 },
+ { CLKID_AHB_UART9, "uart9", "ahb_div",
+ HW_AHBCLKCTRL0, 20 },
+ { CLKID_AHB_I2S0, "i2s0", "ahb_div",
+ HW_AHBCLKCTRL0, 21 },
+ { CLKID_AHB_I2C0, "i2c0", "ahb_div",
+ HW_AHBCLKCTRL0, 22 },
+ { CLKID_AHB_I2C1, "i2c1", "ahb_div",
+ HW_AHBCLKCTRL0, 23 },
+ { CLKID_AHB_SSP0, "ssp0", "ahb_div",
+ HW_AHBCLKCTRL0, 24 },
+ { CLKID_AHB_IOCONFIG, "ioconf", "ahb_div",
+ HW_AHBCLKCTRL0, 25 },
+ { CLKID_AHB_WDT, "wdt", "ahb_div",
+ HW_AHBCLKCTRL0, 26 },
+ { CLKID_AHB_CAN0, "can0", "ahb_div",
+ HW_AHBCLKCTRL0, 27 },
+ { CLKID_AHB_CAN1, "can1", "ahb_div",
+ HW_AHBCLKCTRL0, 28 },
+ { CLKID_AHB_MPWM, "mpwm", "ahb_div",
+ HW_AHBCLKCTRL0, 29 },
+ { CLKID_AHB_SPI0, "spi0", "ahb_div",
+ HW_AHBCLKCTRL0, 30 },
+ { CLKID_AHB_SPI1, "spi1", "ahb_div",
+ HW_AHBCLKCTRL0, 31 },
+
+ { CLKID_AHB_QEI, "qei", "ahb_div",
+ HW_AHBCLKCTRL1, 0 },
+ { CLKID_AHB_QUADSPI0, "quadspi0", "ahb_div",
+ HW_AHBCLKCTRL1, 1 },
+ { CLKID_AHB_CAMIF, "capmif", "ahb_div",
+ HW_AHBCLKCTRL1, 2 },
+ { CLKID_AHB_LCDIF, "lcdif", "ahb_div",
+ HW_AHBCLKCTRL1, 3 },
+ { CLKID_AHB_TIMER0, "timer0", "ahb_div",
+ HW_AHBCLKCTRL1, 4 },
+ { CLKID_AHB_TIMER1, "timer1", "ahb_div",
+ HW_AHBCLKCTRL1, 5 },
+ { CLKID_AHB_TIMER2, "timer2", "ahb_div",
+ HW_AHBCLKCTRL1, 6 },
+ { CLKID_AHB_TIMER3, "timer3", "ahb_div",
+ HW_AHBCLKCTRL1, 7 },
+ { CLKID_AHB_IRQ, "irq", "ahb_div",
+ HW_AHBCLKCTRL1, 8, CLK_IGNORE_UNUSED},
+ { CLKID_AHB_RTC, "rtc", "ahb_div",
+ HW_AHBCLKCTRL1, 9 },
+ { CLKID_AHB_NAND, "nand", "ahb_div",
+ HW_AHBCLKCTRL1, 10 },
+ { CLKID_AHB_ADC0, "adc0", "ahb_div",
+ HW_AHBCLKCTRL1, 11 },
+ { CLKID_AHB_LED, "led", "ahb_div",
+ HW_AHBCLKCTRL1, 12 },
+ { CLKID_AHB_DAC0, "dac0", "ahb_div",
+ HW_AHBCLKCTRL1, 13 },
+ { CLKID_AHB_LCD, "lcd", "ahb_div",
+ HW_AHBCLKCTRL1, 14 },
+ { CLKID_AHB_I2S1, "i2s1", "ahb_div",
+ HW_AHBCLKCTRL1, 15 },
+ { CLKID_AHB_MAC1, "mac1", "ahb_div",
+ HW_AHBCLKCTRL1, 16 },
+};
+
+static const char __initdata *main_mux_p[] = {"oscillator", "pll"};
+static const char __initdata *i2s0_mux_p[] = {"oscillator", "pll", "i2s0m_div"};
+static const char __initdata *i2s1_mux_p[] = {"oscillator", "pll", "i2s1m_div"};
+static const char __initdata *clkout_mux_p[] = {"oscillator", "pll", "rtc"};
+static u32 three_mux_table[] = {0, 1, 3};
+
+static struct asm9260_mux_clock asm9260_mux_clks[] __initdata = {
+ { 1, three_mux_table, "main_mux", main_mux_p,
+ ARRAY_SIZE(main_mux_p), HW_MAINCLKSEL, },
+ { 1, three_mux_table, "uart_mux", main_mux_p,
+ ARRAY_SIZE(main_mux_p), HW_UARTCLKSEL, },
+ { 1, three_mux_table, "wdt_mux", main_mux_p,
+ ARRAY_SIZE(main_mux_p), HW_WDTCLKSEL, },
+ { 3, three_mux_table, "i2s0_mux", i2s0_mux_p,
+ ARRAY_SIZE(i2s0_mux_p), HW_I2S0CLKSEL, },
+ { 3, three_mux_table, "i2s1_mux", i2s1_mux_p,
+ ARRAY_SIZE(i2s1_mux_p), HW_I2S1CLKSEL, },
+ { 3, three_mux_table, "clkout_mux", clkout_mux_p,
+ ARRAY_SIZE(clkout_mux_p), HW_CLKOUTCLKSEL, },
+};
+
+static void __init asm9260_acc_init(struct device_node *np)
+{
+ struct clk *clk;
+ struct resource res;
+ u32 rate;
+ int n;
+ u32 accuracy = 0;
+
+ of_address_to_resource(np, 0, &res);
+ if (!request_mem_region(res.start, resource_size(&res), np->name))
+ panic("%s: unable to request mem region", np->name);
+
+ base = ioremap_nocache(res.start, resource_size(&res));
+ if (!base)
+ panic("%s: unable to map resource", np->name);
+
+
+ /* register pll */
+ rate = (ioread32(base + HW_SYSPLLCTRL) & 0xffff) * 1000000;
+
+ clk_names[REFCLK] = of_clk_get_parent_name(np, 0);
+ accuracy = clk_get_accuracy(__clk_lookup(clk_names[REFCLK]));
+ clk = clk_register_fixed_rate_with_accuracy(NULL, clk_names[SYSPLL],
+ clk_names[REFCLK], 0, rate, accuracy);
+
+ if (IS_ERR(clk))
+ panic("%s: can't register REFCLK. Check DT!", np->name);
+
+ for (n = 0; n < ARRAY_SIZE(asm9260_mux_clks); n++) {
+ const struct asm9260_mux_clock *mc = &asm9260_mux_clks[n];
+
+ mc->parent_names[0] = clk_names[REFCLK];
+ clk = clk_register_mux_table(NULL, mc->name, mc->parent_names,
+ mc->num_parents, mc->flags, base + mc->offset,
+ 0, mc->mask, 0, mc->table, &asm9260_clk_lock);
+ }
+
+ /* clock mux gate cells */
+ for (n = 0; n < ARRAY_SIZE(asm9260_mux_gates); n++) {
+ const struct asm9260_gate_data *gd = &asm9260_mux_gates[n];
+
+ clk = clk_register_gate(NULL, gd->name,
+ gd->parent_name, gd->flags | CLK_SET_RATE_PARENT,
+ base + gd->reg, gd->bit_idx, 0, &asm9260_clk_lock);
+ }
+
+ /* clock div cells */
+ for (n = 0; n < ARRAY_SIZE(asm9260_div_clks); n++) {
+ const struct asm9260_div_clk *dc = &asm9260_div_clks[n];
+
+ clks[dc->idx] = clk_register_divider(NULL, dc->name,
+ dc->parent_name, CLK_SET_RATE_PARENT,
+ base + dc->reg, 0, 8, CLK_DIVIDER_ONE_BASED,
+ &asm9260_clk_lock);
+ }
+
+ /* clock ahb gate cells */
+ for (n = 0; n < ARRAY_SIZE(asm9260_ahb_gates); n++) {
+ const struct asm9260_gate_data *gd = &asm9260_ahb_gates[n];
+
+ clks[gd->idx] = clk_register_gate(NULL, gd->name,
+ gd->parent_name, gd->flags, base + gd->reg,
+ gd->bit_idx, 0, &asm9260_clk_lock);
+ }
+
+ /* check for errors on leaf clocks */
+ for (n = 0; n < MAX_CLKS; n++) {
+ if (!IS_ERR(clks[n]))
+ continue;
+
+ pr_err("%s: Unable to register leaf clock %d\n",
+ np->full_name, n);
+ goto fail;
+ }
+
+ /* register clk-provider */
+ clk_data.clks = clks;
+ clk_data.clk_num = MAX_CLKS;
+ of_clk_add_provider(np, of_clk_src_onecell_get, &clk_data);
+ return;
+fail:
+ iounmap(base);
+}
+CLK_OF_DECLARE(asm9260_acc, "alphascale,asm9260-clock-controller",
+ asm9260_acc_init);
--
1.9.1
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