--- /dev/null
+Status: Unstable - ABI compatibility may be broken in the future
+
+Binding for Keystone gate control driver which uses PSC controller IP.
+
+This binding uses the common clock binding[1].
+
+[1] Documentation/devicetree/bindings/clock/clock-bindings.txt
+
+Required properties:
+- compatible : shall be "ti,keystone,psc-clock".
+- #clock-cells : from common clock binding; shall be set to 0.
+- clocks : parent clock phandle
+- reg : psc control and domain address address space
+- reg-names : psc control and domain registers
+- domain-id : psc domain id needed to check the transition state register
+
+Optional properties:
+- clock-output-names : From common clock binding to override the
+ default output clock name
+Example:
+ clkusb: clkusb {
+ #clock-cells = <0>;
+ compatible = "ti,keystone,psc-clock";
+ clocks = <&chipclk16>;
+ clock-output-names = "usb";
+ reg = <0x02350008 0xb00>, <0x02350000 0x400>;
+ reg-names = "control", "domain";
+ domain-id = <0>;
+ };
--- /dev/null
+Status: Unstable - ABI compatibility may be broken in the future
+
+Binding for keystone PLLs. The main PLL IP typically has a multiplier,
+a divider and a post divider. The additional PLL IPs like ARMPLL, DDRPLL
+and PAPLL are controlled by the memory mapped register where as the Main
+PLL is controlled by a PLL controller registers along with memory mapped
+registers.
+
+This binding uses the common clock binding[1].
+
+[1] Documentation/devicetree/bindings/clock/clock-bindings.txt
+
+Required properties:
+- #clock-cells : from common clock binding; shall be set to 0.
+- compatible : shall be "ti,keystone,main-pll-clock" or "ti,keystone,pll-clock"
+- clocks : parent clock phandle
+- reg - pll control0 and pll multipler registers
+- reg-names : control and multiplier. The multiplier is applicable only for
+ main pll clock
+- fixed-postdiv : fixed post divider value
+
+Example:
+ mainpllclk: mainpllclk@2310110 {
+ #clock-cells = <0>;
+ compatible = "ti,keystone,main-pll-clock";
+ clocks = <&refclkmain>;
+ reg = <0x02620350 4>, <0x02310110 4>;
+ reg-names = "control", "multiplier";
+ fixed-postdiv = <2>;
+ };
+
+ papllclk: papllclk@2620358 {
+ #clock-cells = <0>;
+ compatible = "ti,keystone,pll-clock";
+ clocks = <&refclkmain>;
+ clock-output-names = "pa-pll-clk";
+ reg = <0x02620358 4>;
+ reg-names = "control";
+ fixed-postdiv = <6>;
+ };
+
+Required properties:
+- #clock-cells : from common clock binding; shall be set to 0.
+- compatible : shall be "ti,keystone,pll-mux-clock"
+- clocks : link phandles of parent clocks
+- reg - pll mux register
+- bit-shift : number of bits to shift the bit-mask
+- bit-mask : arbitrary bitmask for programming the mux
+
+Optional properties:
+- clock-output-names : From common clock binding.
+
+Example:
+ mainmuxclk: mainmuxclk@2310108 {
+ #clock-cells = <0>;
+ compatible = "ti,keystone,pll-mux-clock";
+ clocks = <&mainpllclk>, <&refclkmain>;
+ reg = <0x02310108 4>;
+ bit-shift = <23>;
+ bit-mask = <1>;
+ clock-output-names = "mainmuxclk";
+ };
+
+Required properties:
+- #clock-cells : from common clock binding; shall be set to 0.
+- compatible : shall be "ti,keystone,pll-divider-clock"
+- clocks : parent clock phandle
+- reg - pll mux register
+- bit-shift : number of bits to shift the bit-mask
+- bit-mask : arbitrary bitmask for programming the divider
+
+Optional properties:
+- clock-output-names : From common clock binding.
+
+Example:
+ gemtraceclk: gemtraceclk@2310120 {
+ #clock-cells = <0>;
+ compatible = "ti,keystone,pll-divider-clock";
+ clocks = <&mainmuxclk>;
+ reg = <0x02310120 4>;
+ bit-shift = <0>;
+ bit-mask = <8>;
+ clock-output-names = "gemtraceclk";
+ };
--- /dev/null
+Device Tree Clock bindings for APM X-Gene
+
+This binding uses the common clock binding[1].
+
+[1] Documentation/devicetree/bindings/clock/clock-bindings.txt
+
+Required properties:
+- compatible : shall be one of the following:
+ "apm,xgene-socpll-clock" - for a X-Gene SoC PLL clock
+ "apm,xgene-pcppll-clock" - for a X-Gene PCP PLL clock
+ "apm,xgene-device-clock" - for a X-Gene device clock
+
+Required properties for SoC or PCP PLL clocks:
+- reg : shall be the physical PLL register address for the pll clock.
+- clocks : shall be the input parent clock phandle for the clock. This should
+ be the reference clock.
+- #clock-cells : shall be set to 1.
+- clock-output-names : shall be the name of the PLL referenced by derive
+ clock.
+Optional properties for PLL clocks:
+- clock-names : shall be the name of the PLL. If missing, use the device name.
+
+Required properties for device clocks:
+- reg : shall be a list of address and length pairs describing the CSR
+ reset and/or the divider. Either may be omitted, but at least
+ one must be present.
+ - reg-names : shall be a string list describing the reg resource. This
+ may include "csr-reg" and/or "div-reg". If this property
+ is not present, the reg property is assumed to describe
+ only "csr-reg".
+- clocks : shall be the input parent clock phandle for the clock.
+- #clock-cells : shall be set to 1.
+- clock-output-names : shall be the name of the device referenced.
+Optional properties for device clocks:
+- clock-names : shall be the name of the device clock. If missing, use the
+ device name.
+- csr-offset : Offset to the CSR reset register from the reset address base.
+ Default is 0.
+- csr-mask : CSR reset mask bit. Default is 0xF.
+- enable-offset : Offset to the enable register from the reset address base.
+ Default is 0x8.
+- enable-mask : CSR enable mask bit. Default is 0xF.
+- divider-offset : Offset to the divider CSR register from the divider base.
+ Default is 0x0.
+- divider-width : Width of the divider register. Default is 0.
+- divider-shift : Bit shift of the divider register. Default is 0.
+
+For example:
+
+ pcppll: pcppll@17000100 {
+ compatible = "apm,xgene-pcppll-clock";
+ #clock-cells = <1>;
+ clocks = <&refclk 0>;
+ clock-names = "pcppll";
+ reg = <0x0 0x17000100 0x0 0x1000>;
+ clock-output-names = "pcppll";
+ type = <0>;
+ };
+
+ socpll: socpll@17000120 {
+ compatible = "apm,xgene-socpll-clock";
+ #clock-cells = <1>;
+ clocks = <&refclk 0>;
+ clock-names = "socpll";
+ reg = <0x0 0x17000120 0x0 0x1000>;
+ clock-output-names = "socpll";
+ type = <1>;
+ };
+
+ qmlclk: qmlclk {
+ compatible = "apm,xgene-device-clock";
+ #clock-cells = <1>;
+ clocks = <&socplldiv2 0>;
+ clock-names = "qmlclk";
+ reg = <0x0 0x1703C000 0x0 0x1000>;
+ reg-name = "csr-reg";
+ clock-output-names = "qmlclk";
+ };
+
+ ethclk: ethclk {
+ compatible = "apm,xgene-device-clock";
+ #clock-cells = <1>;
+ clocks = <&socplldiv2 0>;
+ clock-names = "ethclk";
+ reg = <0x0 0x17000000 0x0 0x1000>;
+ reg-names = "div-reg";
+ divider-offset = <0x238>;
+ divider-width = <0x9>;
+ divider-shift = <0x0>;
+ clock-output-names = "ethclk";
+ };
+
+ apbclk: apbclk {
+ compatible = "apm,xgene-device-clock";
+ #clock-cells = <1>;
+ clocks = <&ahbclk 0>;
+ clock-names = "apbclk";
+ reg = <0x0 0x1F2AC000 0x0 0x1000
+ 0x0 0x1F2AC000 0x0 0x1000>;
+ reg-names = "csr-reg", "div-reg";
+ csr-offset = <0x0>;
+ csr-mask = <0x200>;
+ enable-offset = <0x8>;
+ enable-mask = <0x200>;
+ divider-offset = <0x10>;
+ divider-width = <0x2>;
+ divider-shift = <0x0>;
+ flags = <0x8>;
+ clock-output-names = "apbclk";
+ };
+
#size-cells = <2>;
ranges;
+ clocks {
+ #address-cells = <2>;
+ #size-cells = <2>;
+ ranges;
+ refclk: refclk {
+ compatible = "fixed-clock";
+ #clock-cells = <1>;
+ clock-frequency = <100000000>;
+ clock-output-names = "refclk";
+ };
+
+ pcppll: pcppll@17000100 {
+ compatible = "apm,xgene-pcppll-clock";
+ #clock-cells = <1>;
+ clocks = <&refclk 0>;
+ clock-names = "pcppll";
+ reg = <0x0 0x17000100 0x0 0x1000>;
+ clock-output-names = "pcppll";
+ type = <0>;
+ };
+
+ socpll: socpll@17000120 {
+ compatible = "apm,xgene-socpll-clock";
+ #clock-cells = <1>;
+ clocks = <&refclk 0>;
+ clock-names = "socpll";
+ reg = <0x0 0x17000120 0x0 0x1000>;
+ clock-output-names = "socpll";
+ type = <1>;
+ };
+
+ socplldiv2: socplldiv2 {
+ compatible = "fixed-factor-clock";
+ #clock-cells = <1>;
+ clocks = <&socpll 0>;
+ clock-names = "socplldiv2";
+ clock-mult = <1>;
+ clock-div = <2>;
+ clock-output-names = "socplldiv2";
+ };
+
+ qmlclk: qmlclk {
+ compatible = "apm,xgene-device-clock";
+ #clock-cells = <1>;
+ clocks = <&socplldiv2 0>;
+ clock-names = "qmlclk";
+ reg = <0x0 0x1703C000 0x0 0x1000>;
+ reg-names = "csr-reg";
+ clock-output-names = "qmlclk";
+ };
+
+ ethclk: ethclk {
+ compatible = "apm,xgene-device-clock";
+ #clock-cells = <1>;
+ clocks = <&socplldiv2 0>;
+ clock-names = "ethclk";
+ reg = <0x0 0x17000000 0x0 0x1000>;
+ reg-names = "div-reg";
+ divider-offset = <0x238>;
+ divider-width = <0x9>;
+ divider-shift = <0x0>;
+ clock-output-names = "ethclk";
+ };
+
+ eth8clk: eth8clk {
+ compatible = "apm,xgene-device-clock";
+ #clock-cells = <1>;
+ clocks = <ðclk 0>;
+ clock-names = "eth8clk";
+ reg = <0x0 0x1702C000 0x0 0x1000>;
+ reg-names = "csr-reg";
+ clock-output-names = "eth8clk";
+ };
+ };
+
serial0: serial@1c020000 {
device_type = "serial";
compatible = "ns16550";
This adds the clock driver support for Freescale PowerPC corenet
platforms using common clock framework.
+config COMMON_CLK_XGENE
+ bool "Clock driver for APM XGene SoC"
+ default y
+ depends on ARM64
+ ---help---
+ Sypport for the APM X-Gene SoC reference, PLL, and device clocks.
+
+config COMMON_CLK_KEYSTONE
+ tristate "Clock drivers for Keystone based SOCs"
+ depends on ARCH_KEYSTONE && OF
+ ---help---
+ Supports clock drivers for Keystone based SOCs. These SOCs have local
+ a power sleep control module that gate the clock to the IPs and PLLs.
+
endmenu
source "drivers/clk/mvebu/Kconfig"
obj-$(CONFIG_ARCH_TEGRA) += tegra/
obj-$(CONFIG_PLAT_SAMSUNG) += samsung/
obj-$(CONFIG_ARCH_SHMOBILE_MULTI) += shmobile/
+obj-$(CONFIG_COMMON_CLK_XGENE) += clk-xgene.o
+obj-$(CONFIG_COMMON_CLK_KEYSTONE) += keystone/
obj-$(CONFIG_X86) += x86/
return 0;
}
-static int wm831x_clk_remove(struct platform_device *pdev)
-{
- return 0;
-}
-
static struct platform_driver wm831x_clk_driver = {
.probe = wm831x_clk_probe,
- .remove = wm831x_clk_remove,
.driver = {
.name = "wm831x-clk",
.owner = THIS_MODULE,
--- /dev/null
+/*
+ * clk-xgene.c - AppliedMicro X-Gene Clock Interface
+ *
+ * Copyright (c) 2013, Applied Micro Circuits Corporation
+ * Author: Loc Ho <lho@apm.com>
+ *
+ * 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
+ *
+ */
+#include <linux/module.h>
+#include <linux/spinlock.h>
+#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/clkdev.h>
+#include <linux/clk-provider.h>
+#include <linux/of_address.h>
+#include <asm/setup.h>
+
+/* Register SCU_PCPPLL bit fields */
+#define N_DIV_RD(src) (((src) & 0x000001ff))
+
+/* Register SCU_SOCPLL bit fields */
+#define CLKR_RD(src) (((src) & 0x07000000)>>24)
+#define CLKOD_RD(src) (((src) & 0x00300000)>>20)
+#define REGSPEC_RESET_F1_MASK 0x00010000
+#define CLKF_RD(src) (((src) & 0x000001ff))
+
+#define XGENE_CLK_DRIVER_VER "0.1"
+
+static DEFINE_SPINLOCK(clk_lock);
+
+static inline u32 xgene_clk_read(void *csr)
+{
+ return readl_relaxed(csr);
+}
+
+static inline void xgene_clk_write(u32 data, void *csr)
+{
+ return writel_relaxed(data, csr);
+}
+
+/* PLL Clock */
+enum xgene_pll_type {
+ PLL_TYPE_PCP = 0,
+ PLL_TYPE_SOC = 1,
+};
+
+struct xgene_clk_pll {
+ struct clk_hw hw;
+ const char *name;
+ void __iomem *reg;
+ spinlock_t *lock;
+ u32 pll_offset;
+ enum xgene_pll_type type;
+};
+
+#define to_xgene_clk_pll(_hw) container_of(_hw, struct xgene_clk_pll, hw)
+
+static int xgene_clk_pll_is_enabled(struct clk_hw *hw)
+{
+ struct xgene_clk_pll *pllclk = to_xgene_clk_pll(hw);
+ u32 data;
+
+ data = xgene_clk_read(pllclk->reg + pllclk->pll_offset);
+ pr_debug("%s pll %s\n", pllclk->name,
+ data & REGSPEC_RESET_F1_MASK ? "disabled" : "enabled");
+
+ return data & REGSPEC_RESET_F1_MASK ? 0 : 1;
+}
+
+static unsigned long xgene_clk_pll_recalc_rate(struct clk_hw *hw,
+ unsigned long parent_rate)
+{
+ struct xgene_clk_pll *pllclk = to_xgene_clk_pll(hw);
+ unsigned long fref;
+ unsigned long fvco;
+ u32 pll;
+ u32 nref;
+ u32 nout;
+ u32 nfb;
+
+ pll = xgene_clk_read(pllclk->reg + pllclk->pll_offset);
+
+ if (pllclk->type == PLL_TYPE_PCP) {
+ /*
+ * PLL VCO = Reference clock * NF
+ * PCP PLL = PLL_VCO / 2
+ */
+ nout = 2;
+ fvco = parent_rate * (N_DIV_RD(pll) + 4);
+ } else {
+ /*
+ * Fref = Reference Clock / NREF;
+ * Fvco = Fref * NFB;
+ * Fout = Fvco / NOUT;
+ */
+ nref = CLKR_RD(pll) + 1;
+ nout = CLKOD_RD(pll) + 1;
+ nfb = CLKF_RD(pll);
+ fref = parent_rate / nref;
+ fvco = fref * nfb;
+ }
+ pr_debug("%s pll recalc rate %ld parent %ld\n", pllclk->name,
+ fvco / nout, parent_rate);
+
+ return fvco / nout;
+}
+
+const struct clk_ops xgene_clk_pll_ops = {
+ .is_enabled = xgene_clk_pll_is_enabled,
+ .recalc_rate = xgene_clk_pll_recalc_rate,
+};
+
+static struct clk *xgene_register_clk_pll(struct device *dev,
+ const char *name, const char *parent_name,
+ unsigned long flags, void __iomem *reg, u32 pll_offset,
+ u32 type, spinlock_t *lock)
+{
+ struct xgene_clk_pll *apmclk;
+ struct clk *clk;
+ struct clk_init_data init;
+
+ /* allocate the APM clock structure */
+ apmclk = kzalloc(sizeof(*apmclk), GFP_KERNEL);
+ if (!apmclk) {
+ pr_err("%s: could not allocate APM clk\n", __func__);
+ return ERR_PTR(-ENOMEM);
+ }
+
+ init.name = name;
+ init.ops = &xgene_clk_pll_ops;
+ init.flags = flags;
+ init.parent_names = parent_name ? &parent_name : NULL;
+ init.num_parents = parent_name ? 1 : 0;
+
+ apmclk->name = name;
+ apmclk->reg = reg;
+ apmclk->lock = lock;
+ apmclk->pll_offset = pll_offset;
+ apmclk->type = type;
+ apmclk->hw.init = &init;
+
+ /* Register the clock */
+ clk = clk_register(dev, &apmclk->hw);
+ if (IS_ERR(clk)) {
+ pr_err("%s: could not register clk %s\n", __func__, name);
+ kfree(apmclk);
+ return NULL;
+ }
+ return clk;
+}
+
+static void xgene_pllclk_init(struct device_node *np, enum xgene_pll_type pll_type)
+{
+ const char *clk_name = np->full_name;
+ struct clk *clk;
+ void *reg;
+
+ reg = of_iomap(np, 0);
+ if (reg == NULL) {
+ pr_err("Unable to map CSR register for %s\n", np->full_name);
+ return;
+ }
+ of_property_read_string(np, "clock-output-names", &clk_name);
+ clk = xgene_register_clk_pll(NULL,
+ clk_name, of_clk_get_parent_name(np, 0),
+ CLK_IS_ROOT, reg, 0, pll_type, &clk_lock);
+ if (!IS_ERR(clk)) {
+ of_clk_add_provider(np, of_clk_src_simple_get, clk);
+ clk_register_clkdev(clk, clk_name, NULL);
+ pr_debug("Add %s clock PLL\n", clk_name);
+ }
+}
+
+static void xgene_socpllclk_init(struct device_node *np)
+{
+ xgene_pllclk_init(np, PLL_TYPE_SOC);
+}
+
+static void xgene_pcppllclk_init(struct device_node *np)
+{
+ xgene_pllclk_init(np, PLL_TYPE_PCP);
+}
+
+/* IP Clock */
+struct xgene_dev_parameters {
+ void __iomem *csr_reg; /* CSR for IP clock */
+ u32 reg_clk_offset; /* Offset to clock enable CSR */
+ u32 reg_clk_mask; /* Mask bit for clock enable */
+ u32 reg_csr_offset; /* Offset to CSR reset */
+ u32 reg_csr_mask; /* Mask bit for disable CSR reset */
+ void __iomem *divider_reg; /* CSR for divider */
+ u32 reg_divider_offset; /* Offset to divider register */
+ u32 reg_divider_shift; /* Bit shift to divider field */
+ u32 reg_divider_width; /* Width of the bit to divider field */
+};
+
+struct xgene_clk {
+ struct clk_hw hw;
+ const char *name;
+ spinlock_t *lock;
+ struct xgene_dev_parameters param;
+};
+
+#define to_xgene_clk(_hw) container_of(_hw, struct xgene_clk, hw)
+
+static int xgene_clk_enable(struct clk_hw *hw)
+{
+ struct xgene_clk *pclk = to_xgene_clk(hw);
+ unsigned long flags = 0;
+ u32 data;
+
+ if (pclk->lock)
+ spin_lock_irqsave(pclk->lock, flags);
+
+ if (pclk->param.csr_reg != NULL) {
+ pr_debug("%s clock enabled\n", pclk->name);
+ /* First enable the clock */
+ data = xgene_clk_read(pclk->param.csr_reg +
+ pclk->param.reg_clk_offset);
+ data |= pclk->param.reg_clk_mask;
+ xgene_clk_write(data, pclk->param.csr_reg +
+ pclk->param.reg_clk_offset);
+ pr_debug("%s clock PADDR base 0x%016LX clk offset 0x%08X mask 0x%08X value 0x%08X\n",
+ pclk->name, __pa(pclk->param.csr_reg),
+ pclk->param.reg_clk_offset, pclk->param.reg_clk_mask,
+ data);
+
+ /* Second enable the CSR */
+ data = xgene_clk_read(pclk->param.csr_reg +
+ pclk->param.reg_csr_offset);
+ data &= ~pclk->param.reg_csr_mask;
+ xgene_clk_write(data, pclk->param.csr_reg +
+ pclk->param.reg_csr_offset);
+ pr_debug("%s CSR RESET PADDR base 0x%016LX csr offset 0x%08X mask 0x%08X value 0x%08X\n",
+ pclk->name, __pa(pclk->param.csr_reg),
+ pclk->param.reg_csr_offset, pclk->param.reg_csr_mask,
+ data);
+ }
+
+ if (pclk->lock)
+ spin_unlock_irqrestore(pclk->lock, flags);
+
+ return 0;
+}
+
+static void xgene_clk_disable(struct clk_hw *hw)
+{
+ struct xgene_clk *pclk = to_xgene_clk(hw);
+ unsigned long flags = 0;
+ u32 data;
+
+ if (pclk->lock)
+ spin_lock_irqsave(pclk->lock, flags);
+
+ if (pclk->param.csr_reg != NULL) {
+ pr_debug("%s clock disabled\n", pclk->name);
+ /* First put the CSR in reset */
+ data = xgene_clk_read(pclk->param.csr_reg +
+ pclk->param.reg_csr_offset);
+ data |= pclk->param.reg_csr_mask;
+ xgene_clk_write(data, pclk->param.csr_reg +
+ pclk->param.reg_csr_offset);
+
+ /* Second disable the clock */
+ data = xgene_clk_read(pclk->param.csr_reg +
+ pclk->param.reg_clk_offset);
+ data &= ~pclk->param.reg_clk_mask;
+ xgene_clk_write(data, pclk->param.csr_reg +
+ pclk->param.reg_clk_offset);
+ }
+
+ if (pclk->lock)
+ spin_unlock_irqrestore(pclk->lock, flags);
+}
+
+static int xgene_clk_is_enabled(struct clk_hw *hw)
+{
+ struct xgene_clk *pclk = to_xgene_clk(hw);
+ u32 data = 0;
+
+ if (pclk->param.csr_reg != NULL) {
+ pr_debug("%s clock checking\n", pclk->name);
+ data = xgene_clk_read(pclk->param.csr_reg +
+ pclk->param.reg_clk_offset);
+ pr_debug("%s clock is %s\n", pclk->name,
+ data & pclk->param.reg_clk_mask ? "enabled" :
+ "disabled");
+ }
+
+ if (pclk->param.csr_reg == NULL)
+ return 1;
+ return data & pclk->param.reg_clk_mask ? 1 : 0;
+}
+
+static unsigned long xgene_clk_recalc_rate(struct clk_hw *hw,
+ unsigned long parent_rate)
+{
+ struct xgene_clk *pclk = to_xgene_clk(hw);
+ u32 data;
+
+ if (pclk->param.divider_reg) {
+ data = xgene_clk_read(pclk->param.divider_reg +
+ pclk->param.reg_divider_offset);
+ data >>= pclk->param.reg_divider_shift;
+ data &= (1 << pclk->param.reg_divider_width) - 1;
+
+ pr_debug("%s clock recalc rate %ld parent %ld\n",
+ pclk->name, parent_rate / data, parent_rate);
+ return parent_rate / data;
+ } else {
+ pr_debug("%s clock recalc rate %ld parent %ld\n",
+ pclk->name, parent_rate, parent_rate);
+ return parent_rate;
+ }
+}
+
+static int xgene_clk_set_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long parent_rate)
+{
+ struct xgene_clk *pclk = to_xgene_clk(hw);
+ unsigned long flags = 0;
+ u32 data;
+ u32 divider;
+ u32 divider_save;
+
+ if (pclk->lock)
+ spin_lock_irqsave(pclk->lock, flags);
+
+ if (pclk->param.divider_reg) {
+ /* Let's compute the divider */
+ if (rate > parent_rate)
+ rate = parent_rate;
+ divider_save = divider = parent_rate / rate; /* Rounded down */
+ divider &= (1 << pclk->param.reg_divider_width) - 1;
+ divider <<= pclk->param.reg_divider_shift;
+
+ /* Set new divider */
+ data = xgene_clk_read(pclk->param.divider_reg +
+ pclk->param.reg_divider_offset);
+ data &= ~((1 << pclk->param.reg_divider_width) - 1);
+ data |= divider;
+ xgene_clk_write(data, pclk->param.divider_reg +
+ pclk->param.reg_divider_offset);
+ pr_debug("%s clock set rate %ld\n", pclk->name,
+ parent_rate / divider_save);
+ } else {
+ divider_save = 1;
+ }
+
+ if (pclk->lock)
+ spin_unlock_irqrestore(pclk->lock, flags);
+
+ return parent_rate / divider_save;
+}
+
+static long xgene_clk_round_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long *prate)
+{
+ struct xgene_clk *pclk = to_xgene_clk(hw);
+ unsigned long parent_rate = *prate;
+ u32 divider;
+
+ if (pclk->param.divider_reg) {
+ /* Let's compute the divider */
+ if (rate > parent_rate)
+ rate = parent_rate;
+ divider = parent_rate / rate; /* Rounded down */
+ } else {
+ divider = 1;
+ }
+
+ return parent_rate / divider;
+}
+
+const struct clk_ops xgene_clk_ops = {
+ .enable = xgene_clk_enable,
+ .disable = xgene_clk_disable,
+ .is_enabled = xgene_clk_is_enabled,
+ .recalc_rate = xgene_clk_recalc_rate,
+ .set_rate = xgene_clk_set_rate,
+ .round_rate = xgene_clk_round_rate,
+};
+
+static struct clk *xgene_register_clk(struct device *dev,
+ const char *name, const char *parent_name,
+ struct xgene_dev_parameters *parameters, spinlock_t *lock)
+{
+ struct xgene_clk *apmclk;
+ struct clk *clk;
+ struct clk_init_data init;
+ int rc;
+
+ /* allocate the APM clock structure */
+ apmclk = kzalloc(sizeof(*apmclk), GFP_KERNEL);
+ if (!apmclk) {
+ pr_err("%s: could not allocate APM clk\n", __func__);
+ return ERR_PTR(-ENOMEM);
+ }
+
+ init.name = name;
+ init.ops = &xgene_clk_ops;
+ init.flags = 0;
+ init.parent_names = parent_name ? &parent_name : NULL;
+ init.num_parents = parent_name ? 1 : 0;
+
+ apmclk->name = name;
+ apmclk->lock = lock;
+ apmclk->hw.init = &init;
+ apmclk->param = *parameters;
+
+ /* Register the clock */
+ clk = clk_register(dev, &apmclk->hw);
+ if (IS_ERR(clk)) {
+ pr_err("%s: could not register clk %s\n", __func__, name);
+ kfree(apmclk);
+ return clk;
+ }
+
+ /* Register the clock for lookup */
+ rc = clk_register_clkdev(clk, name, NULL);
+ if (rc != 0) {
+ pr_err("%s: could not register lookup clk %s\n",
+ __func__, name);
+ }
+ return clk;
+}
+
+static void __init xgene_devclk_init(struct device_node *np)
+{
+ const char *clk_name = np->full_name;
+ struct clk *clk;
+ struct resource res;
+ int rc;
+ struct xgene_dev_parameters parameters;
+ int i;
+
+ /* Check if the entry is disabled */
+ if (!of_device_is_available(np))
+ return;
+
+ /* Parse the DTS register for resource */
+ parameters.csr_reg = NULL;
+ parameters.divider_reg = NULL;
+ for (i = 0; i < 2; i++) {
+ void *map_res;
+ rc = of_address_to_resource(np, i, &res);
+ if (rc != 0) {
+ if (i == 0) {
+ pr_err("no DTS register for %s\n",
+ np->full_name);
+ return;
+ }
+ break;
+ }
+ map_res = of_iomap(np, i);
+ if (map_res == NULL) {
+ pr_err("Unable to map resource %d for %s\n",
+ i, np->full_name);
+ goto err;
+ }
+ if (strcmp(res.name, "div-reg") == 0)
+ parameters.divider_reg = map_res;
+ else /* if (strcmp(res->name, "csr-reg") == 0) */
+ parameters.csr_reg = map_res;
+ }
+ if (of_property_read_u32(np, "csr-offset", ¶meters.reg_csr_offset))
+ parameters.reg_csr_offset = 0;
+ if (of_property_read_u32(np, "csr-mask", ¶meters.reg_csr_mask))
+ parameters.reg_csr_mask = 0xF;
+ if (of_property_read_u32(np, "enable-offset",
+ ¶meters.reg_clk_offset))
+ parameters.reg_clk_offset = 0x8;
+ if (of_property_read_u32(np, "enable-mask", ¶meters.reg_clk_mask))
+ parameters.reg_clk_mask = 0xF;
+ if (of_property_read_u32(np, "divider-offset",
+ ¶meters.reg_divider_offset))
+ parameters.reg_divider_offset = 0;
+ if (of_property_read_u32(np, "divider-width",
+ ¶meters.reg_divider_width))
+ parameters.reg_divider_width = 0;
+ if (of_property_read_u32(np, "divider-shift",
+ ¶meters.reg_divider_shift))
+ parameters.reg_divider_shift = 0;
+ of_property_read_string(np, "clock-output-names", &clk_name);
+
+ clk = xgene_register_clk(NULL, clk_name,
+ of_clk_get_parent_name(np, 0), ¶meters, &clk_lock);
+ if (IS_ERR(clk))
+ goto err;
+ pr_debug("Add %s clock\n", clk_name);
+ rc = of_clk_add_provider(np, of_clk_src_simple_get, clk);
+ if (rc != 0)
+ pr_err("%s: could register provider clk %s\n", __func__,
+ np->full_name);
+
+ return;
+
+err:
+ if (parameters.csr_reg)
+ iounmap(parameters.csr_reg);
+ if (parameters.divider_reg)
+ iounmap(parameters.divider_reg);
+}
+
+CLK_OF_DECLARE(xgene_socpll_clock, "apm,xgene-socpll-clock", xgene_socpllclk_init);
+CLK_OF_DECLARE(xgene_pcppll_clock, "apm,xgene-pcppll-clock", xgene_pcppllclk_init);
+CLK_OF_DECLARE(xgene_dev_clock, "apm,xgene-device-clock", xgene_devclk_init);
}
EXPORT_SYMBOL_GPL(clk_get_rate);
-static u8 clk_fetch_parent_index(struct clk *clk, struct clk *parent)
+static int clk_fetch_parent_index(struct clk *clk, struct clk *parent)
{
- u8 i;
+ int i;
- if (!clk->parents)
- clk->parents = kzalloc((sizeof(struct clk*) * clk->num_parents),
- GFP_KERNEL);
+ if (!clk->parents) {
+ clk->parents = kcalloc(clk->num_parents,
+ sizeof(struct clk *), GFP_KERNEL);
+ if (!clk->parents)
+ return -ENOMEM;
+ }
/*
* find index of new parent clock using cached parent ptrs,
* them now to avoid future calls to __clk_lookup.
*/
for (i = 0; i < clk->num_parents; i++) {
- if (clk->parents && clk->parents[i] == parent)
- break;
- else if (!strcmp(clk->parent_names[i], parent->name)) {
- if (clk->parents)
- clk->parents[i] = __clk_lookup(parent->name);
- break;
+ if (clk->parents[i] == parent)
+ return i;
+
+ if (clk->parents[i])
+ continue;
+
+ if (!strcmp(clk->parent_names[i], parent->name)) {
+ clk->parents[i] = __clk_lookup(parent->name);
+ return i;
}
}
- return i;
+ return -EINVAL;
}
static void clk_reparent(struct clk *clk, struct clk *new_parent)
struct clk *old_parent, *parent;
unsigned long best_parent_rate = 0;
unsigned long new_rate;
- u8 p_index = 0;
+ int p_index = 0;
/* sanity */
if (IS_ERR_OR_NULL(clk))
/* try finding the new parent index */
if (parent) {
p_index = clk_fetch_parent_index(clk, parent);
- if (p_index == clk->num_parents) {
+ if (p_index < 0) {
pr_debug("%s: clk %s can not be parent of clk %s\n",
__func__, parent->name, clk->name);
return NULL;
if (!clk->parents)
clk->parents =
- kzalloc((sizeof(struct clk*) * clk->num_parents),
+ kcalloc(clk->num_parents, sizeof(struct clk *),
GFP_KERNEL);
ret = clk_get_parent_by_index(clk, index);
int clk_set_parent(struct clk *clk, struct clk *parent)
{
int ret = 0;
- u8 p_index = 0;
+ int p_index = 0;
unsigned long p_rate = 0;
if (!clk)
if (parent) {
p_index = clk_fetch_parent_index(clk, parent);
p_rate = parent->rate;
- if (p_index == clk->num_parents) {
+ if (p_index < 0) {
pr_debug("%s: clk %s can not be parent of clk %s\n",
__func__, parent->name, clk->name);
- ret = -EINVAL;
+ ret = p_index;
goto out;
}
}
* for clock drivers to statically initialize clk->parents.
*/
if (clk->num_parents > 1 && !clk->parents) {
- clk->parents = kzalloc((sizeof(struct clk*) * clk->num_parents),
- GFP_KERNEL);
+ clk->parents = kcalloc(clk->num_parents, sizeof(struct clk *),
+ GFP_KERNEL);
/*
* __clk_lookup returns NULL for parents that have not been
* clk_init'd; thus any access to clk->parents[] must check
hw->clk = clk;
/* allocate local copy in case parent_names is __initdata */
- clk->parent_names = kzalloc((sizeof(char*) * clk->num_parents),
- GFP_KERNEL);
+ clk->parent_names = kcalloc(clk->num_parents, sizeof(char *),
+ GFP_KERNEL);
if (!clk->parent_names) {
pr_err("%s: could not allocate clk->parent_names\n", __func__);
return clk;
}
+int of_clk_get_parent_count(struct device_node *np)
+{
+ return of_count_phandle_with_args(np, "clocks", "#clock-cells");
+}
+EXPORT_SYMBOL_GPL(of_clk_get_parent_count);
+
const char *of_clk_get_parent_name(struct device_node *np, int index)
{
struct of_phandle_args clkspec;
--- /dev/null
+obj-y += pll.o gate.o
--- /dev/null
+/*
+ * Clock driver for Keystone 2 based devices
+ *
+ * Copyright (C) 2013 Texas Instruments.
+ * Murali Karicheri <m-karicheri2@ti.com>
+ * Santosh Shilimkar <santosh.shilimkar@ti.com>
+ *
+ * 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.
+ */
+#include <linux/clk.h>
+#include <linux/clk-provider.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/slab.h>
+#include <linux/of_address.h>
+#include <linux/of.h>
+#include <linux/module.h>
+
+/* PSC register offsets */
+#define PTCMD 0x120
+#define PTSTAT 0x128
+#define PDSTAT 0x200
+#define PDCTL 0x300
+#define MDSTAT 0x800
+#define MDCTL 0xa00
+
+/* PSC module states */
+#define PSC_STATE_SWRSTDISABLE 0
+#define PSC_STATE_SYNCRST 1
+#define PSC_STATE_DISABLE 2
+#define PSC_STATE_ENABLE 3
+
+#define MDSTAT_STATE_MASK 0x3f
+#define MDSTAT_MCKOUT BIT(12)
+#define PDSTAT_STATE_MASK 0x1f
+#define MDCTL_FORCE BIT(31)
+#define MDCTL_LRESET BIT(8)
+#define PDCTL_NEXT BIT(0)
+
+/* Maximum timeout to bail out state transition for module */
+#define STATE_TRANS_MAX_COUNT 0xffff
+
+static void __iomem *domain_transition_base;
+
+/**
+ * struct clk_psc_data - PSC data
+ * @control_base: Base address for a PSC control
+ * @domain_base: Base address for a PSC domain
+ * @domain_id: PSC domain id number
+ */
+struct clk_psc_data {
+ void __iomem *control_base;
+ void __iomem *domain_base;
+ u32 domain_id;
+};
+
+/**
+ * struct clk_psc - PSC clock structure
+ * @hw: clk_hw for the psc
+ * @psc_data: PSC driver specific data
+ * @lock: Spinlock used by the driver
+ */
+struct clk_psc {
+ struct clk_hw hw;
+ struct clk_psc_data *psc_data;
+ spinlock_t *lock;
+};
+
+static DEFINE_SPINLOCK(psc_lock);
+
+#define to_clk_psc(_hw) container_of(_hw, struct clk_psc, hw)
+
+static void psc_config(void __iomem *control_base, void __iomem *domain_base,
+ u32 next_state, u32 domain_id)
+{
+ u32 ptcmd, pdstat, pdctl, mdstat, mdctl, ptstat;
+ u32 count = STATE_TRANS_MAX_COUNT;
+
+ mdctl = readl(control_base + MDCTL);
+ mdctl &= ~MDSTAT_STATE_MASK;
+ mdctl |= next_state;
+ /* For disable, we always put the module in local reset */
+ if (next_state == PSC_STATE_DISABLE)
+ mdctl &= ~MDCTL_LRESET;
+ writel(mdctl, control_base + MDCTL);
+
+ pdstat = readl(domain_base + PDSTAT);
+ if (!(pdstat & PDSTAT_STATE_MASK)) {
+ pdctl = readl(domain_base + PDCTL);
+ pdctl |= PDCTL_NEXT;
+ writel(pdctl, domain_base + PDCTL);
+ }
+
+ ptcmd = 1 << domain_id;
+ writel(ptcmd, domain_transition_base + PTCMD);
+ do {
+ ptstat = readl(domain_transition_base + PTSTAT);
+ } while (((ptstat >> domain_id) & 1) && count--);
+
+ count = STATE_TRANS_MAX_COUNT;
+ do {
+ mdstat = readl(control_base + MDSTAT);
+ } while (!((mdstat & MDSTAT_STATE_MASK) == next_state) && count--);
+}
+
+static int keystone_clk_is_enabled(struct clk_hw *hw)
+{
+ struct clk_psc *psc = to_clk_psc(hw);
+ struct clk_psc_data *data = psc->psc_data;
+ u32 mdstat = readl(data->control_base + MDSTAT);
+
+ return (mdstat & MDSTAT_MCKOUT) ? 1 : 0;
+}
+
+static int keystone_clk_enable(struct clk_hw *hw)
+{
+ struct clk_psc *psc = to_clk_psc(hw);
+ struct clk_psc_data *data = psc->psc_data;
+ unsigned long flags = 0;
+
+ if (psc->lock)
+ spin_lock_irqsave(psc->lock, flags);
+
+ psc_config(data->control_base, data->domain_base,
+ PSC_STATE_ENABLE, data->domain_id);
+
+ if (psc->lock)
+ spin_unlock_irqrestore(psc->lock, flags);
+
+ return 0;
+}
+
+static void keystone_clk_disable(struct clk_hw *hw)
+{
+ struct clk_psc *psc = to_clk_psc(hw);
+ struct clk_psc_data *data = psc->psc_data;
+ unsigned long flags = 0;
+
+ if (psc->lock)
+ spin_lock_irqsave(psc->lock, flags);
+
+ psc_config(data->control_base, data->domain_base,
+ PSC_STATE_DISABLE, data->domain_id);
+
+ if (psc->lock)
+ spin_unlock_irqrestore(psc->lock, flags);
+}
+
+static const struct clk_ops clk_psc_ops = {
+ .enable = keystone_clk_enable,
+ .disable = keystone_clk_disable,
+ .is_enabled = keystone_clk_is_enabled,
+};
+
+/**
+ * clk_register_psc - register psc clock
+ * @dev: device that is registering this clock
+ * @name: name of this clock
+ * @parent_name: name of clock's parent
+ * @psc_data: platform data to configure this clock
+ * @lock: spinlock used by this clock
+ */
+static struct clk *clk_register_psc(struct device *dev,
+ const char *name,
+ const char *parent_name,
+ struct clk_psc_data *psc_data,
+ spinlock_t *lock)
+{
+ struct clk_init_data init;
+ struct clk_psc *psc;
+ struct clk *clk;
+
+ psc = kzalloc(sizeof(*psc), GFP_KERNEL);
+ if (!psc)
+ return ERR_PTR(-ENOMEM);
+
+ init.name = name;
+ init.ops = &clk_psc_ops;
+ init.parent_names = (parent_name ? &parent_name : NULL);
+ init.num_parents = (parent_name ? 1 : 0);
+
+ psc->psc_data = psc_data;
+ psc->lock = lock;
+ psc->hw.init = &init;
+
+ clk = clk_register(NULL, &psc->hw);
+ if (IS_ERR(clk))
+ kfree(psc);
+
+ return clk;
+}
+
+/**
+ * of_psc_clk_init - initialize psc clock through DT
+ * @node: device tree node for this clock
+ * @lock: spinlock used by this clock
+ */
+static void __init of_psc_clk_init(struct device_node *node, spinlock_t *lock)
+{
+ const char *clk_name = node->name;
+ const char *parent_name;
+ struct clk_psc_data *data;
+ struct clk *clk;
+ int i;
+
+ data = kzalloc(sizeof(*data), GFP_KERNEL);
+ if (!data) {
+ pr_err("%s: Out of memory\n", __func__);
+ return;
+ }
+
+ i = of_property_match_string(node, "reg-names", "control");
+ data->control_base = of_iomap(node, i);
+ if (!data->control_base) {
+ pr_err("%s: control ioremap failed\n", __func__);
+ goto out;
+ }
+
+ i = of_property_match_string(node, "reg-names", "domain");
+ data->domain_base = of_iomap(node, i);
+ if (!data->domain_base) {
+ pr_err("%s: domain ioremap failed\n", __func__);
+ iounmap(data->control_base);
+ goto out;
+ }
+
+ of_property_read_u32(node, "domain-id", &data->domain_id);
+
+ /* Domain transition registers at fixed address space of domain_id 0 */
+ if (!domain_transition_base && !data->domain_id)
+ domain_transition_base = data->domain_base;
+
+ of_property_read_string(node, "clock-output-names", &clk_name);
+ parent_name = of_clk_get_parent_name(node, 0);
+ if (!parent_name) {
+ pr_err("%s: Parent clock not found\n", __func__);
+ goto out;
+ }
+
+ clk = clk_register_psc(NULL, clk_name, parent_name, data, lock);
+ if (clk) {
+ of_clk_add_provider(node, of_clk_src_simple_get, clk);
+ return;
+ }
+
+ pr_err("%s: error registering clk %s\n", __func__, node->name);
+out:
+ kfree(data);
+ return;
+}
+
+/**
+ * of_keystone_psc_clk_init - initialize psc clock through DT
+ * @node: device tree node for this clock
+ */
+static void __init of_keystone_psc_clk_init(struct device_node *node)
+{
+ of_psc_clk_init(node, &psc_lock);
+}
+CLK_OF_DECLARE(keystone_gate_clk, "ti,keystone,psc-clock",
+ of_keystone_psc_clk_init);
--- /dev/null
+/*
+ * PLL clock driver for Keystone devices
+ *
+ * Copyright (C) 2013 Texas Instruments Inc.
+ * Murali Karicheri <m-karicheri2@ti.com>
+ * Santosh Shilimkar <santosh.shilimkar@ti.com>
+ *
+ * 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.
+ */
+#include <linux/clk.h>
+#include <linux/clk-provider.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/slab.h>
+#include <linux/of_address.h>
+#include <linux/of.h>
+#include <linux/module.h>
+
+#define PLLM_LOW_MASK 0x3f
+#define PLLM_HIGH_MASK 0x7ffc0
+#define MAIN_PLLM_HIGH_MASK 0x7f000
+#define PLLM_HIGH_SHIFT 6
+#define PLLD_MASK 0x3f
+
+/**
+ * struct clk_pll_data - pll data structure
+ * @has_pllctrl: If set to non zero, lower 6 bits of multiplier is in pllm
+ * register of pll controller, else it is in the pll_ctrl0((bit 11-6)
+ * @phy_pllm: Physical address of PLLM in pll controller. Used when
+ * has_pllctrl is non zero.
+ * @phy_pll_ctl0: Physical address of PLL ctrl0. This could be that of
+ * Main PLL or any other PLLs in the device such as ARM PLL, DDR PLL
+ * or PA PLL available on keystone2. These PLLs are controlled by
+ * this register. Main PLL is controlled by a PLL controller.
+ * @pllm: PLL register map address
+ * @pll_ctl0: PLL controller map address
+ * @pllm_lower_mask: multiplier lower mask
+ * @pllm_upper_mask: multiplier upper mask
+ * @pllm_upper_shift: multiplier upper shift
+ * @plld_mask: divider mask
+ * @postdiv: Post divider
+ */
+struct clk_pll_data {
+ bool has_pllctrl;
+ u32 phy_pllm;
+ u32 phy_pll_ctl0;
+ void __iomem *pllm;
+ void __iomem *pll_ctl0;
+ u32 pllm_lower_mask;
+ u32 pllm_upper_mask;
+ u32 pllm_upper_shift;
+ u32 plld_mask;
+ u32 postdiv;
+};
+
+/**
+ * struct clk_pll - Main pll clock
+ * @hw: clk_hw for the pll
+ * @pll_data: PLL driver specific data
+ */
+struct clk_pll {
+ struct clk_hw hw;
+ struct clk_pll_data *pll_data;
+};
+
+#define to_clk_pll(_hw) container_of(_hw, struct clk_pll, hw)
+
+static unsigned long clk_pllclk_recalc(struct clk_hw *hw,
+ unsigned long parent_rate)
+{
+ struct clk_pll *pll = to_clk_pll(hw);
+ struct clk_pll_data *pll_data = pll->pll_data;
+ unsigned long rate = parent_rate;
+ u32 mult = 0, prediv, postdiv, val;
+
+ /*
+ * get bits 0-5 of multiplier from pllctrl PLLM register
+ * if has_pllctrl is non zero
+ */
+ if (pll_data->has_pllctrl) {
+ val = readl(pll_data->pllm);
+ mult = (val & pll_data->pllm_lower_mask);
+ }
+
+ /* bit6-12 of PLLM is in Main PLL control register */
+ val = readl(pll_data->pll_ctl0);
+ mult |= ((val & pll_data->pllm_upper_mask)
+ >> pll_data->pllm_upper_shift);
+ prediv = (val & pll_data->plld_mask);
+ postdiv = pll_data->postdiv;
+
+ rate /= (prediv + 1);
+ rate = (rate * (mult + 1));
+ rate /= postdiv;
+
+ return rate;
+}
+
+static const struct clk_ops clk_pll_ops = {
+ .recalc_rate = clk_pllclk_recalc,
+};
+
+static struct clk *clk_register_pll(struct device *dev,
+ const char *name,
+ const char *parent_name,
+ struct clk_pll_data *pll_data)
+{
+ struct clk_init_data init;
+ struct clk_pll *pll;
+ struct clk *clk;
+
+ pll = kzalloc(sizeof(*pll), GFP_KERNEL);
+ if (!pll)
+ return ERR_PTR(-ENOMEM);
+
+ init.name = name;
+ init.ops = &clk_pll_ops;
+ init.flags = 0;
+ init.parent_names = (parent_name ? &parent_name : NULL);
+ init.num_parents = (parent_name ? 1 : 0);
+
+ pll->pll_data = pll_data;
+ pll->hw.init = &init;
+
+ clk = clk_register(NULL, &pll->hw);
+ if (IS_ERR(clk))
+ goto out;
+
+ return clk;
+out:
+ kfree(pll);
+ return NULL;
+}
+
+/**
+ * _of_clk_init - PLL initialisation via DT
+ * @node: device tree node for this clock
+ * @pllctrl: If true, lower 6 bits of multiplier is in pllm register of
+ * pll controller, else it is in the control regsiter0(bit 11-6)
+ */
+static void __init _of_pll_clk_init(struct device_node *node, bool pllctrl)
+{
+ struct clk_pll_data *pll_data;
+ const char *parent_name;
+ struct clk *clk;
+ int i;
+
+ pll_data = kzalloc(sizeof(*pll_data), GFP_KERNEL);
+ if (!pll_data) {
+ pr_err("%s: Out of memory\n", __func__);
+ return;
+ }
+
+ parent_name = of_clk_get_parent_name(node, 0);
+ if (of_property_read_u32(node, "fixed-postdiv", &pll_data->postdiv))
+ goto out;
+
+ i = of_property_match_string(node, "reg-names", "control");
+ pll_data->pll_ctl0 = of_iomap(node, i);
+ if (!pll_data->pll_ctl0) {
+ pr_err("%s: ioremap failed\n", __func__);
+ goto out;
+ }
+
+ pll_data->pllm_lower_mask = PLLM_LOW_MASK;
+ pll_data->pllm_upper_shift = PLLM_HIGH_SHIFT;
+ pll_data->plld_mask = PLLD_MASK;
+ pll_data->has_pllctrl = pllctrl;
+ if (!pll_data->has_pllctrl) {
+ pll_data->pllm_upper_mask = PLLM_HIGH_MASK;
+ } else {
+ pll_data->pllm_upper_mask = MAIN_PLLM_HIGH_MASK;
+ i = of_property_match_string(node, "reg-names", "multiplier");
+ pll_data->pllm = of_iomap(node, i);
+ if (!pll_data->pllm) {
+ iounmap(pll_data->pll_ctl0);
+ goto out;
+ }
+ }
+
+ clk = clk_register_pll(NULL, node->name, parent_name, pll_data);
+ if (clk) {
+ of_clk_add_provider(node, of_clk_src_simple_get, clk);
+ return;
+ }
+
+out:
+ pr_err("%s: error initializing pll %s\n", __func__, node->name);
+ kfree(pll_data);
+}
+
+/**
+ * of_keystone_pll_clk_init - PLL initialisation DT wrapper
+ * @node: device tree node for this clock
+ */
+static void __init of_keystone_pll_clk_init(struct device_node *node)
+{
+ _of_pll_clk_init(node, false);
+}
+CLK_OF_DECLARE(keystone_pll_clock, "ti,keystone,pll-clock",
+ of_keystone_pll_clk_init);
+
+/**
+ * of_keystone_pll_main_clk_init - Main PLL initialisation DT wrapper
+ * @node: device tree node for this clock
+ */
+static void __init of_keystone_main_pll_clk_init(struct device_node *node)
+{
+ _of_pll_clk_init(node, true);
+}
+CLK_OF_DECLARE(keystone_main_pll_clock, "ti,keystone,main-pll-clock",
+ of_keystone_main_pll_clk_init);
+
+/**
+ * of_pll_div_clk_init - PLL divider setup function
+ * @node: device tree node for this clock
+ */
+static void __init of_pll_div_clk_init(struct device_node *node)
+{
+ const char *parent_name;
+ void __iomem *reg;
+ u32 shift, mask;
+ struct clk *clk;
+ const char *clk_name = node->name;
+
+ of_property_read_string(node, "clock-output-names", &clk_name);
+ reg = of_iomap(node, 0);
+ if (!reg) {
+ pr_err("%s: ioremap failed\n", __func__);
+ return;
+ }
+
+ parent_name = of_clk_get_parent_name(node, 0);
+ if (!parent_name) {
+ pr_err("%s: missing parent clock\n", __func__);
+ return;
+ }
+
+ if (of_property_read_u32(node, "bit-shift", &shift)) {
+ pr_err("%s: missing 'shift' property\n", __func__);
+ return;
+ }
+
+ if (of_property_read_u32(node, "bit-mask", &mask)) {
+ pr_err("%s: missing 'bit-mask' property\n", __func__);
+ return;
+ }
+
+ clk = clk_register_divider(NULL, clk_name, parent_name, 0, reg, shift,
+ mask, 0, NULL);
+ if (clk)
+ of_clk_add_provider(node, of_clk_src_simple_get, clk);
+ else
+ pr_err("%s: error registering divider %s\n", __func__, clk_name);
+}
+CLK_OF_DECLARE(pll_divider_clock, "ti,keystone,pll-divider-clock", of_pll_div_clk_init);
+
+/**
+ * of_pll_mux_clk_init - PLL mux setup function
+ * @node: device tree node for this clock
+ */
+static void __init of_pll_mux_clk_init(struct device_node *node)
+{
+ void __iomem *reg;
+ u32 shift, mask;
+ struct clk *clk;
+ const char *parents[2];
+ const char *clk_name = node->name;
+
+ of_property_read_string(node, "clock-output-names", &clk_name);
+ reg = of_iomap(node, 0);
+ if (!reg) {
+ pr_err("%s: ioremap failed\n", __func__);
+ return;
+ }
+
+ parents[0] = of_clk_get_parent_name(node, 0);
+ parents[1] = of_clk_get_parent_name(node, 1);
+ if (!parents[0] || !parents[1]) {
+ pr_err("%s: missing parent clocks\n", __func__);
+ return;
+ }
+
+ if (of_property_read_u32(node, "bit-shift", &shift)) {
+ pr_err("%s: missing 'shift' property\n", __func__);
+ return;
+ }
+
+ if (of_property_read_u32(node, "bit-mask", &mask)) {
+ pr_err("%s: missing 'bit-mask' property\n", __func__);
+ return;
+ }
+
+ clk = clk_register_mux(NULL, clk_name, (const char **)&parents,
+ ARRAY_SIZE(parents) , 0, reg, shift, mask,
+ 0, NULL);
+ if (clk)
+ of_clk_add_provider(node, of_clk_src_simple_get, clk);
+ else
+ pr_err("%s: error registering mux %s\n", __func__, clk_name);
+}
+CLK_OF_DECLARE(pll_mux_clock, "ti,keystone,pll-mux-clock", of_pll_mux_clk_init);
goto err;
fclk_gate_lock = kmalloc(sizeof(*fclk_gate_lock), GFP_KERNEL);
if (!fclk_gate_lock)
- goto err;
+ goto err_fclk_gate_lock;
spin_lock_init(fclk_lock);
spin_lock_init(fclk_gate_lock);
mux_name = kasprintf(GFP_KERNEL, "%s_mux", clk_name);
+ if (!mux_name)
+ goto err_mux_name;
div0_name = kasprintf(GFP_KERNEL, "%s_div0", clk_name);
+ if (!div0_name)
+ goto err_div0_name;
div1_name = kasprintf(GFP_KERNEL, "%s_div1", clk_name);
+ if (!div1_name)
+ goto err_div1_name;
clk = clk_register_mux(NULL, mux_name, parents, 4,
CLK_SET_RATE_NO_REPARENT, fclk_ctrl_reg, 4, 2, 0,
return;
+err_div1_name:
+ kfree(div0_name);
+err_div0_name:
+ kfree(mux_name);
+err_mux_name:
+ kfree(fclk_gate_lock);
+err_fclk_gate_lock:
+ kfree(fclk_lock);
err:
clks[fclk] = ERR_PTR(-ENOMEM);
}
struct clk *of_clk_src_simple_get(struct of_phandle_args *clkspec,
void *data);
struct clk *of_clk_src_onecell_get(struct of_phandle_args *clkspec, void *data);
+int of_clk_get_parent_count(struct device_node *np);
const char *of_clk_get_parent_name(struct device_node *np, int index);
void of_clk_init(const struct of_device_id *matches);
projects / karo-tx-linux.git / commitdiff