[U-Boot] [PATCH v5] clk: at91: Add clock driver
Wenyou Yang
wenyou.yang at atmel.com
Wed Jul 20 11:55:12 CEST 2016
The patch is referred to at91 clock driver of Linux, to make
the clock node descriptions in DT aligned with the Linux's.
Signed-off-by: Wenyou Yang <wenyou.yang at atmel.com>
Reviewed-by: Simon Glass <sjg at chromium.org>
---
Changes in v5:
- Change clk_client.h -> clk.h to adapt to clk API conversion.
- Fix missing semicolon and clk->dev in clk-generated.c.
- Make clock options selectable via menuconfig.
Changes in v4:
- Add Reviewed-by tag.
- Add more information in Kconfig help.
- Use u32 for num_parents variable, not u8.
- Change the check return from clk_get_rate().
- Remove return -ENODEV line, use return ret.
- Improve the comments in at91_system_clk_enable().
Changes in v3:
- Update based on [PATCH] clk: convert API to match reset/mailbox
style (http://patchwork.ozlabs.org/patch/625342/).
- Remove [PATCH] clk: clk-uclass: Add post binding for CLK uclass,
add bind() method to bind the clk node without compatible.
- Add help for Kconfig HAVE_AT91_XX option.
- Add ofdata_to_platdata() method for generated clock driver
to handle the device tree.
- Use setbits_le32() to replace readl()/writel().
- Fixed the return value, -ENODEV->-EINVAL.
- Use dev_get_addr_ptr() to replace dev_get_addr().
- Remove check on dev_get_parent() return.
Changes in v2:
- Remove the redundant log print.
arch/arm/mach-at91/include/mach/at91_pmc.h | 11 +-
drivers/clk/Kconfig | 1 +
drivers/clk/Makefile | 1 +
drivers/clk/at91/Kconfig | 43 ++++++++
drivers/clk/at91/Makefile | 11 ++
drivers/clk/at91/clk-generated.c | 162 +++++++++++++++++++++++++++++
drivers/clk/at91/clk-h32mx.c | 56 ++++++++++
drivers/clk/at91/clk-main.c | 55 ++++++++++
drivers/clk/at91/clk-master.c | 33 ++++++
drivers/clk/at91/clk-peripheral.c | 60 +++++++++++
drivers/clk/at91/clk-plla.c | 55 ++++++++++
drivers/clk/at91/clk-slow.c | 37 +++++++
drivers/clk/at91/clk-system.c | 76 ++++++++++++++
drivers/clk/at91/clk-utmi.c | 67 ++++++++++++
drivers/clk/at91/pmc.c | 71 +++++++++++++
drivers/clk/at91/pmc.h | 18 ++++
drivers/clk/at91/sckc.c | 30 ++++++
17 files changed, 784 insertions(+), 3 deletions(-)
create mode 100644 drivers/clk/at91/Kconfig
create mode 100644 drivers/clk/at91/Makefile
create mode 100644 drivers/clk/at91/clk-generated.c
create mode 100644 drivers/clk/at91/clk-h32mx.c
create mode 100644 drivers/clk/at91/clk-main.c
create mode 100644 drivers/clk/at91/clk-master.c
create mode 100644 drivers/clk/at91/clk-peripheral.c
create mode 100644 drivers/clk/at91/clk-plla.c
create mode 100644 drivers/clk/at91/clk-slow.c
create mode 100644 drivers/clk/at91/clk-system.c
create mode 100644 drivers/clk/at91/clk-utmi.c
create mode 100644 drivers/clk/at91/pmc.c
create mode 100644 drivers/clk/at91/pmc.h
create mode 100644 drivers/clk/at91/sckc.c
diff --git a/arch/arm/mach-at91/include/mach/at91_pmc.h b/arch/arm/mach-at91/include/mach/at91_pmc.h
index 680ceb0..2875ff2 100644
--- a/arch/arm/mach-at91/include/mach/at91_pmc.h
+++ b/arch/arm/mach-at91/include/mach/at91_pmc.h
@@ -149,6 +149,9 @@ typedef struct at91_pmc {
#define AT91_PMC_PCR_PID_MASK (0x3f)
#define AT91_PMC_PCR_GCKCSS (0x7 << 8)
+#define AT91_PMC_PCR_GCKCSS_MASK 0x07
+#define AT91_PMC_PCR_GCKCSS_OFFSET 8
+#define AT91_PMC_PCR_GCKCSS_(x) ((x & 0x07) << 8)
#define AT91_PMC_PCR_GCKCSS_SLOW_CLK (0x0 << 8)
#define AT91_PMC_PCR_GCKCSS_MAIN_CLK (0x1 << 8)
#define AT91_PMC_PCR_GCKCSS_PLLA_CLK (0x2 << 8)
@@ -158,8 +161,9 @@ typedef struct at91_pmc {
#define AT91_PMC_PCR_CMD_WRITE (0x1 << 12)
#define AT91_PMC_PCR_DIV (0x3 << 16)
#define AT91_PMC_PCR_GCKDIV (0xff << 20)
-#define AT91_PMC_PCR_GCKDIV_(x) (((x) & 0xff) << 20)
-#define AT91_PMC_PCR_GCKDIV_OFFSET 20
+#define AT91_PMC_PCR_GCKDIV_MASK 0xff
+#define AT91_PMC_PCR_GCKDIV_OFFSET 20
+#define AT91_PMC_PCR_GCKDIV_(x) ((x & 0xff) << 20)
#define AT91_PMC_PCR_EN (0x1 << 28)
#define AT91_PMC_PCR_GCKEN (0x1 << 29)
@@ -243,8 +247,9 @@ typedef struct at91_pmc {
#define AT91_PMC_PCK1RDY (1 << 9) /* Programmable Clock 1 */
#define AT91_PMC_PCK2RDY (1 << 10) /* Programmable Clock 2 */
#define AT91_PMC_PCK3RDY (1 << 11) /* Programmable Clock 3 */
+#define AT91_PMC_MOSCSELS BIT(16) /* Main Oscillator Selection Status */
+#define AT91_PMC_MOSCRCS BIT(17) /* 12 MHz RC Oscillator Status */
#define AT91_PMC_GCKRDY (1 << 24)
-
#define AT91_PMC_PROTKEY 0x504d4301 /* Activation Code */
/* PLL Charge Pump Current Register (PMC_PLLICPR) */
diff --git a/drivers/clk/Kconfig b/drivers/clk/Kconfig
index 6eee8eb..3da63c0 100644
--- a/drivers/clk/Kconfig
+++ b/drivers/clk/Kconfig
@@ -22,5 +22,6 @@ config SPL_CLK
source "drivers/clk/uniphier/Kconfig"
source "drivers/clk/exynos/Kconfig"
+source "drivers/clk/at91/Kconfig"
endmenu
diff --git a/drivers/clk/Makefile b/drivers/clk/Makefile
index f7a8891..863a8d7 100644
--- a/drivers/clk/Makefile
+++ b/drivers/clk/Makefile
@@ -13,3 +13,4 @@ obj-$(CONFIG_SANDBOX) += clk_sandbox_test.o
obj-$(CONFIG_MACH_PIC32) += clk_pic32.o
obj-$(CONFIG_CLK_UNIPHIER) += uniphier/
obj-$(CONFIG_CLK_EXYNOS) += exynos/
+obj-$(CONFIG_CLK_AT91) += at91/
diff --git a/drivers/clk/at91/Kconfig b/drivers/clk/at91/Kconfig
new file mode 100644
index 0000000..10050d8
--- /dev/null
+++ b/drivers/clk/at91/Kconfig
@@ -0,0 +1,43 @@
+config CLK_AT91
+ bool "AT91 clock drivers"
+ depends on CLK
+ help
+ This option is used to enable the AT91 clock driver.
+ The driver supports the AT91 clock generator, including
+ the oscillators and PLLs, such as main clock, slow clock,
+ PLLA, UTMI PLL. Clocks can also be a source clock of other
+ clocks a tree structure, such as master clock, usb device
+ clock, matrix clock and generic clock.
+ Devices can use a common clock API to request a particular
+ clock, enable it and get its rate.
+
+config AT91_UTMI
+ bool "Support UTMI PLL Clock"
+ depends on CLK_AT91
+ help
+ This option is used to enable the AT91 UTMI PLL clock
+ driver. It is the clock provider of USB, and UPLLCK is the
+ output of 480 MHz UTMI PLL, The souce clock of the UTMI
+ PLL is the main clock, so the main clock must select the
+ fast crystal oscillator to meet the frequency accuracy
+ required by USB.
+
+config AT91_H32MX
+ bool "Support H32MX 32-bit Matrix Clock"
+ depends on CLK_AT91
+ help
+ This option is used to enable the AT91 H32MX matrixes
+ clock driver. There are H64MX and H32MX matrixes clocks,
+ H64MX 64-bit matrix clocks are MCK. The H32MX 32-bit
+ matrix clock is to be configured as MCK if MCK does not
+ exceed 83 MHz, else it is to be configured as MCK/2.
+
+config AT91_GENERIC_CLK
+ bool "Support Generic Clock"
+ depends on CLK_AT91
+ help
+ This option is used to enable the AT91 generic clock
+ driver. Some peripherals may need a second clock source
+ that may be different from the system clock. This second
+ clock is the generic clock (GCLK) and is managed by
+ the PMC via PMC_PCR register.
diff --git a/drivers/clk/at91/Makefile b/drivers/clk/at91/Makefile
new file mode 100644
index 0000000..fbe3cb6
--- /dev/null
+++ b/drivers/clk/at91/Makefile
@@ -0,0 +1,11 @@
+#
+# Makefile for at91 specific clk
+#
+
+obj-y += pmc.o sckc.o
+obj-y += clk-slow.o clk-main.o clk-plla.o clk-master.o
+obj-y += clk-system.o clk-peripheral.o
+
+obj-$(CONFIG_AT91_UTMI) += clk-utmi.o
+obj-$(CONFIG_AT91_H32MX) += clk-h32mx.o
+obj-$(CONFIG_AT91_GENERIC_CLK) += clk-generated.o
diff --git a/drivers/clk/at91/clk-generated.c b/drivers/clk/at91/clk-generated.c
new file mode 100644
index 0000000..f6164cc
--- /dev/null
+++ b/drivers/clk/at91/clk-generated.c
@@ -0,0 +1,162 @@
+/*
+ * Copyright (C) 2016 Atmel Corporation
+ * Wenyou.Yang <wenyou.yang at atmel.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <clk-uclass.h>
+#include <dm/device.h>
+#include <linux/io.h>
+#include <mach/at91_pmc.h>
+#include "pmc.h"
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#define GENERATED_SOURCE_MAX 6
+#define GENERATED_MAX_DIV 255
+
+struct generated_clk_priv {
+ u32 num_parents;
+};
+
+static ulong generated_clk_get_rate(struct clk *clk)
+{
+ struct pmc_platdata *plat = dev_get_platdata(clk->dev);
+ struct at91_pmc *pmc = plat->reg_base;
+ struct clk parent;
+ u32 tmp, gckdiv;
+ u8 parent_id;
+ int ret;
+
+ writel(clk->id & AT91_PMC_PCR_PID_MASK, &pmc->pcr);
+ tmp = readl(&pmc->pcr);
+ parent_id = (tmp >> AT91_PMC_PCR_GCKCSS_OFFSET) &
+ AT91_PMC_PCR_GCKCSS_MASK;
+ gckdiv = (tmp >> AT91_PMC_PCR_GCKDIV_OFFSET) & AT91_PMC_PCR_GCKDIV_MASK;
+
+ ret = clk_get_by_index(clk->dev, parent_id, &parent);
+ if (ret)
+ return 0;
+
+ return clk_get_rate(&parent) / (gckdiv + 1);
+}
+
+static ulong generated_clk_set_rate(struct clk *clk, ulong rate)
+{
+ struct pmc_platdata *plat = dev_get_platdata(clk->dev);
+ struct at91_pmc *pmc = plat->reg_base;
+ struct generated_clk_priv *priv = dev_get_priv(clk->dev);
+ struct clk parent, best_parent;
+ ulong tmp_rate, best_rate = rate, parent_rate;
+ int tmp_diff, best_diff = -1;
+ u32 div, best_div = 0;
+ u8 best_parent_id = 0;
+ u8 i;
+ u32 tmp;
+ int ret;
+
+ for (i = 0; i < priv->num_parents; i++) {
+ ret = clk_get_by_index(clk->dev, i, &parent);
+ if (ret)
+ return ret;
+
+ parent_rate = clk_get_rate(&parent);
+ if (IS_ERR_VALUE(parent_rate))
+ return parent_rate;
+
+ for (div = 1; div < GENERATED_MAX_DIV + 2; div++) {
+ tmp_rate = DIV_ROUND_CLOSEST(parent_rate, div);
+ if (rate < tmp_rate)
+ continue;
+ tmp_diff = rate - tmp_rate;
+
+ if (best_diff < 0 || best_diff > tmp_diff) {
+ best_rate = tmp_rate;
+ best_diff = tmp_diff;
+
+ best_div = div - 1;
+ best_parent = parent;
+ best_parent_id = i;
+ }
+
+ if (!best_diff || tmp_rate < rate)
+ break;
+ }
+
+ if (!best_diff)
+ break;
+ }
+
+ debug("GCK: best parent: %s, best_rate = %ld, best_div = %d\n",
+ best_parent.dev->name, best_rate, best_div);
+
+ ret = clk_enable(&best_parent);
+ if (ret)
+ return ret;
+
+ writel(clk->id & AT91_PMC_PCR_PID_MASK, &pmc->pcr);
+ tmp = readl(&pmc->pcr);
+ tmp &= ~(AT91_PMC_PCR_GCKDIV | AT91_PMC_PCR_GCKCSS);
+ tmp |= AT91_PMC_PCR_GCKCSS_(best_parent_id) |
+ AT91_PMC_PCR_CMD_WRITE |
+ AT91_PMC_PCR_GCKDIV_(best_div) |
+ AT91_PMC_PCR_GCKEN;
+ writel(tmp, &pmc->pcr);
+
+ while (!(readl(&pmc->sr) & AT91_PMC_GCKRDY))
+ ;
+
+ return 0;
+}
+
+static struct clk_ops generated_clk_ops = {
+ .get_rate = generated_clk_get_rate,
+ .set_rate = generated_clk_set_rate,
+};
+
+static int generated_clk_ofdata_to_platdata(struct udevice *dev)
+{
+ struct generated_clk_priv *priv = dev_get_priv(dev);
+ u32 cells[GENERATED_SOURCE_MAX];
+ u32 num_parents;
+
+ num_parents = fdtdec_get_int_array_count(gd->fdt_blob, dev->of_offset,
+ "clocks", cells,
+ GENERATED_SOURCE_MAX);
+
+ if (!num_parents)
+ return -1;
+
+ priv->num_parents = num_parents;
+
+ return 0;
+}
+
+static int generated_clk_bind(struct udevice *dev)
+{
+ return at91_pmc_clk_node_bind(dev);
+}
+
+static int generated_clk_probe(struct udevice *dev)
+{
+ return at91_pmc_core_probe(dev);
+}
+
+static const struct udevice_id generated_clk_match[] = {
+ { .compatible = "atmel,sama5d2-clk-generated" },
+ {}
+};
+
+U_BOOT_DRIVER(generated_clk) = {
+ .name = "generated-clk",
+ .id = UCLASS_CLK,
+ .of_match = generated_clk_match,
+ .bind = generated_clk_bind,
+ .probe = generated_clk_probe,
+ .ofdata_to_platdata = generated_clk_ofdata_to_platdata,
+ .priv_auto_alloc_size = sizeof(struct generated_clk_priv),
+ .platdata_auto_alloc_size = sizeof(struct pmc_platdata),
+ .ops = &generated_clk_ops,
+};
diff --git a/drivers/clk/at91/clk-h32mx.c b/drivers/clk/at91/clk-h32mx.c
new file mode 100644
index 0000000..1a304ba
--- /dev/null
+++ b/drivers/clk/at91/clk-h32mx.c
@@ -0,0 +1,56 @@
+/*
+ * Copyright (C) 2016 Atmel Corporation
+ * Wenyou.Yang <wenyou.yang at atmel.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <clk-uclass.h>
+#include <dm/device.h>
+#include <dm/util.h>
+#include <linux/io.h>
+#include <mach/at91_pmc.h>
+#include "pmc.h"
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#define H32MX_MAX_FREQ 90000000
+
+static ulong sama5d4_h32mx_clk_get_rate(struct clk *clk)
+{
+ struct pmc_platdata *plat = dev_get_platdata(clk->dev);
+ struct at91_pmc *pmc = plat->reg_base;
+ ulong rate = gd->arch.mck_rate_hz;
+
+ if (readl(&pmc->mckr) & AT91_PMC_MCKR_H32MXDIV)
+ rate /= 2;
+
+ if (rate > H32MX_MAX_FREQ)
+ dm_warn("H32MX clock is too fast\n");
+
+ return rate;
+}
+
+static struct clk_ops sama5d4_h32mx_clk_ops = {
+ .get_rate = sama5d4_h32mx_clk_get_rate,
+};
+
+static int sama5d4_h32mx_clk_probe(struct udevice *dev)
+{
+ return at91_pmc_core_probe(dev);
+}
+
+static const struct udevice_id sama5d4_h32mx_clk_match[] = {
+ { .compatible = "atmel,sama5d4-clk-h32mx" },
+ {}
+};
+
+U_BOOT_DRIVER(sama5d4_h32mx_clk) = {
+ .name = "sama5d4-h32mx-clk",
+ .id = UCLASS_CLK,
+ .of_match = sama5d4_h32mx_clk_match,
+ .probe = sama5d4_h32mx_clk_probe,
+ .platdata_auto_alloc_size = sizeof(struct pmc_platdata),
+ .ops = &sama5d4_h32mx_clk_ops,
+};
diff --git a/drivers/clk/at91/clk-main.c b/drivers/clk/at91/clk-main.c
new file mode 100644
index 0000000..252d076
--- /dev/null
+++ b/drivers/clk/at91/clk-main.c
@@ -0,0 +1,55 @@
+/*
+ * Copyright (C) 2016 Atmel Corporation
+ * Wenyou.Yang <wenyou.yang at atmel.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <clk-uclass.h>
+#include <dm/device.h>
+#include <linux/io.h>
+#include <mach/at91_pmc.h>
+#include "pmc.h"
+
+DECLARE_GLOBAL_DATA_PTR;
+
+static int main_osc_clk_enable(struct clk *clk)
+{
+ struct pmc_platdata *plat = dev_get_platdata(clk->dev);
+ struct at91_pmc *pmc = plat->reg_base;
+
+ if (readl(&pmc->sr) & AT91_PMC_MOSCSELS)
+ return 0;
+
+ return -EINVAL;
+}
+
+static ulong main_osc_clk_get_rate(struct clk *clk)
+{
+ return gd->arch.main_clk_rate_hz;
+}
+
+static struct clk_ops main_osc_clk_ops = {
+ .enable = main_osc_clk_enable,
+ .get_rate = main_osc_clk_get_rate,
+};
+
+static int main_osc_clk_probe(struct udevice *dev)
+{
+ return at91_pmc_core_probe(dev);
+}
+
+static const struct udevice_id main_osc_clk_match[] = {
+ { .compatible = "atmel,at91sam9x5-clk-main" },
+ {}
+};
+
+U_BOOT_DRIVER(at91sam9x5_main_osc_clk) = {
+ .name = "at91sam9x5-main-osc-clk",
+ .id = UCLASS_CLK,
+ .of_match = main_osc_clk_match,
+ .probe = main_osc_clk_probe,
+ .platdata_auto_alloc_size = sizeof(struct pmc_platdata),
+ .ops = &main_osc_clk_ops,
+};
diff --git a/drivers/clk/at91/clk-master.c b/drivers/clk/at91/clk-master.c
new file mode 100644
index 0000000..284b248
--- /dev/null
+++ b/drivers/clk/at91/clk-master.c
@@ -0,0 +1,33 @@
+/*
+ * Copyright (C) 2016 Atmel Corporation
+ * Wenyou.Yang <wenyou.yang at atmel.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <clk-uclass.h>
+#include <dm/device.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+static ulong at91_master_clk_get_rate(struct clk *clk)
+{
+ return gd->arch.mck_rate_hz;
+}
+
+static struct clk_ops at91_master_clk_ops = {
+ .get_rate = at91_master_clk_get_rate,
+};
+
+static const struct udevice_id at91_master_clk_match[] = {
+ { .compatible = "atmel,at91sam9x5-clk-master" },
+ {}
+};
+
+U_BOOT_DRIVER(at91_master_clk) = {
+ .name = "at91-master-clk",
+ .id = UCLASS_CLK,
+ .of_match = at91_master_clk_match,
+ .ops = &at91_master_clk_ops,
+};
diff --git a/drivers/clk/at91/clk-peripheral.c b/drivers/clk/at91/clk-peripheral.c
new file mode 100644
index 0000000..16688e9
--- /dev/null
+++ b/drivers/clk/at91/clk-peripheral.c
@@ -0,0 +1,60 @@
+/*
+ * Copyright (C) 2016 Atmel Corporation
+ * Wenyou.Yang <wenyou.yang at atmel.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <clk-uclass.h>
+#include <dm/device.h>
+#include <linux/io.h>
+#include <mach/at91_pmc.h>
+#include "pmc.h"
+
+#define PERIPHERAL_ID_MIN 2
+#define PERIPHERAL_ID_MAX 31
+#define PERIPHERAL_MASK(id) (1 << ((id) & PERIPHERAL_ID_MAX))
+
+static int sam9x5_periph_clk_enable(struct clk *clk)
+{
+ struct pmc_platdata *plat = dev_get_platdata(clk->dev);
+ struct at91_pmc *pmc = plat->reg_base;
+
+ if (clk->id < PERIPHERAL_ID_MIN)
+ return -1;
+
+ writel(clk->id & AT91_PMC_PCR_PID_MASK, &pmc->pcr);
+ setbits_le32(&pmc->pcr, AT91_PMC_PCR_CMD_WRITE | AT91_PMC_PCR_EN);
+
+ return 0;
+}
+
+static struct clk_ops sam9x5_periph_clk_ops = {
+ .enable = sam9x5_periph_clk_enable,
+};
+
+static int sam9x5_periph_clk_bind(struct udevice *dev)
+{
+ return at91_pmc_clk_node_bind(dev);
+}
+
+static int sam9x5_periph_clk_probe(struct udevice *dev)
+{
+ return at91_pmc_core_probe(dev);
+}
+
+static const struct udevice_id sam9x5_periph_clk_match[] = {
+ { .compatible = "atmel,at91sam9x5-clk-peripheral" },
+ {}
+};
+
+U_BOOT_DRIVER(sam9x5_periph_clk) = {
+ .name = "sam9x5-periph-clk",
+ .id = UCLASS_CLK,
+ .of_match = sam9x5_periph_clk_match,
+ .bind = sam9x5_periph_clk_bind,
+ .probe = sam9x5_periph_clk_probe,
+ .platdata_auto_alloc_size = sizeof(struct pmc_platdata),
+ .ops = &sam9x5_periph_clk_ops,
+};
diff --git a/drivers/clk/at91/clk-plla.c b/drivers/clk/at91/clk-plla.c
new file mode 100644
index 0000000..2a71399
--- /dev/null
+++ b/drivers/clk/at91/clk-plla.c
@@ -0,0 +1,55 @@
+/*
+ * Copyright (C) 2016 Atmel Corporation
+ * Wenyou.Yang <wenyou.yang at atmel.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <clk-uclass.h>
+#include <dm/device.h>
+#include <linux/io.h>
+#include <mach/at91_pmc.h>
+#include "pmc.h"
+
+DECLARE_GLOBAL_DATA_PTR;
+
+static int plla_clk_enable(struct clk *clk)
+{
+ struct pmc_platdata *plat = dev_get_platdata(clk->dev);
+ struct at91_pmc *pmc = plat->reg_base;
+
+ if (readl(&pmc->sr) & AT91_PMC_LOCKA)
+ return 0;
+
+ return -EINVAL;
+}
+
+static ulong plla_clk_get_rate(struct clk *clk)
+{
+ return gd->arch.plla_rate_hz;
+}
+
+static struct clk_ops plla_clk_ops = {
+ .enable = plla_clk_enable,
+ .get_rate = plla_clk_get_rate,
+};
+
+static int plla_clk_probe(struct udevice *dev)
+{
+ return at91_pmc_core_probe(dev);
+}
+
+static const struct udevice_id plla_clk_match[] = {
+ { .compatible = "atmel,sama5d3-clk-pll" },
+ {}
+};
+
+U_BOOT_DRIVER(at91_plla_clk) = {
+ .name = "at91-plla-clk",
+ .id = UCLASS_CLK,
+ .of_match = plla_clk_match,
+ .probe = plla_clk_probe,
+ .platdata_auto_alloc_size = sizeof(struct pmc_platdata),
+ .ops = &plla_clk_ops,
+};
diff --git a/drivers/clk/at91/clk-slow.c b/drivers/clk/at91/clk-slow.c
new file mode 100644
index 0000000..f7666b4
--- /dev/null
+++ b/drivers/clk/at91/clk-slow.c
@@ -0,0 +1,37 @@
+/*
+ * Copyright (C) 2016 Atmel Corporation
+ * Wenyou.Yang <wenyou.yang at atmel.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <clk-uclass.h>
+#include <dm/device.h>
+
+static int at91_slow_clk_enable(struct clk *clk)
+{
+ return 0;
+}
+
+static ulong at91_slow_clk_get_rate(struct clk *clk)
+{
+ return CONFIG_SYS_AT91_SLOW_CLOCK;
+}
+
+static struct clk_ops at91_slow_clk_ops = {
+ .enable = at91_slow_clk_enable,
+ .get_rate = at91_slow_clk_get_rate,
+};
+
+static const struct udevice_id at91_slow_clk_match[] = {
+ { .compatible = "atmel,at91sam9x5-clk-slow" },
+ {}
+};
+
+U_BOOT_DRIVER(at91_slow_clk) = {
+ .name = "at91-slow-clk",
+ .id = UCLASS_CLK,
+ .of_match = at91_slow_clk_match,
+ .ops = &at91_slow_clk_ops,
+};
diff --git a/drivers/clk/at91/clk-system.c b/drivers/clk/at91/clk-system.c
new file mode 100644
index 0000000..fa80bad
--- /dev/null
+++ b/drivers/clk/at91/clk-system.c
@@ -0,0 +1,76 @@
+/*
+ * Copyright (C) 2016 Atmel Corporation
+ * Wenyou.Yang <wenyou.yang at atmel.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <clk-uclass.h>
+#include <dm/device.h>
+#include <linux/io.h>
+#include <mach/at91_pmc.h>
+#include "pmc.h"
+
+#define SYSTEM_MAX_ID 31
+
+static inline int is_pck(int id)
+{
+ return (id >= 8) && (id <= 15);
+}
+
+static int at91_system_clk_enable(struct clk *clk)
+{
+ struct pmc_platdata *plat = dev_get_platdata(clk->dev);
+ struct at91_pmc *pmc = plat->reg_base;
+ u32 mask;
+
+ if (clk->id > SYSTEM_MAX_ID)
+ return -EINVAL;
+
+ mask = BIT(clk->id);
+
+ writel(mask, &pmc->scer);
+
+ /**
+ * For the programmable clocks the Ready status in the PMC
+ * status register should be checked after enabling.
+ * For other clocks this is unnecessary.
+ */
+ if (!is_pck(clk->id))
+ return 0;
+
+ while (!(readl(&pmc->sr) & mask))
+ ;
+
+ return 0;
+}
+
+static struct clk_ops at91_system_clk_ops = {
+ .enable = at91_system_clk_enable,
+};
+
+static int at91_system_clk_bind(struct udevice *dev)
+{
+ return at91_pmc_clk_node_bind(dev);
+}
+
+static int at91_system_clk_probe(struct udevice *dev)
+{
+ return at91_pmc_core_probe(dev);
+}
+
+static const struct udevice_id at91_system_clk_match[] = {
+ { .compatible = "atmel,at91rm9200-clk-system" },
+ {}
+};
+
+U_BOOT_DRIVER(at91_system_clk) = {
+ .name = "at91-system-clk",
+ .id = UCLASS_CLK,
+ .of_match = at91_system_clk_match,
+ .bind = at91_system_clk_bind,
+ .probe = at91_system_clk_probe,
+ .platdata_auto_alloc_size = sizeof(struct pmc_platdata),
+ .ops = &at91_system_clk_ops,
+};
diff --git a/drivers/clk/at91/clk-utmi.c b/drivers/clk/at91/clk-utmi.c
new file mode 100644
index 0000000..369a687
--- /dev/null
+++ b/drivers/clk/at91/clk-utmi.c
@@ -0,0 +1,67 @@
+/*
+ * Copyright (C) 2016 Atmel Corporation
+ * Wenyou.Yang <wenyou.yang at atmel.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <clk-uclass.h>
+#include <dm/device.h>
+#include <linux/io.h>
+#include <mach/at91_pmc.h>
+#include "pmc.h"
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#define UTMI_FIXED_MUL 40
+
+static int utmi_clk_enable(struct clk *clk)
+{
+ struct pmc_platdata *plat = dev_get_platdata(clk->dev);
+ struct at91_pmc *pmc = plat->reg_base;
+ u32 tmp;
+
+ if (readl(&pmc->sr) & AT91_PMC_LOCKU)
+ return 0;
+
+ tmp = readl(&pmc->uckr);
+ tmp |= AT91_PMC_UPLLEN |
+ AT91_PMC_UPLLCOUNT |
+ AT91_PMC_BIASEN;
+ writel(tmp, &pmc->uckr);
+
+ while (!(readl(&pmc->sr) & AT91_PMC_LOCKU))
+ ;
+
+ return 0;
+}
+
+static ulong utmi_clk_get_rate(struct clk *clk)
+{
+ return gd->arch.main_clk_rate_hz * UTMI_FIXED_MUL;
+}
+
+static struct clk_ops utmi_clk_ops = {
+ .enable = utmi_clk_enable,
+ .get_rate = utmi_clk_get_rate,
+};
+
+static int utmi_clk_probe(struct udevice *dev)
+{
+ return at91_pmc_core_probe(dev);
+}
+
+static const struct udevice_id utmi_clk_match[] = {
+ { .compatible = "atmel,at91sam9x5-clk-utmi" },
+ {}
+};
+
+U_BOOT_DRIVER(at91sam9x5_utmi_clk) = {
+ .name = "at91sam9x5-utmi-clk",
+ .id = UCLASS_CLK,
+ .of_match = utmi_clk_match,
+ .probe = utmi_clk_probe,
+ .platdata_auto_alloc_size = sizeof(struct pmc_platdata),
+ .ops = &utmi_clk_ops,
+};
diff --git a/drivers/clk/at91/pmc.c b/drivers/clk/at91/pmc.c
new file mode 100644
index 0000000..a08d7e8
--- /dev/null
+++ b/drivers/clk/at91/pmc.c
@@ -0,0 +1,71 @@
+/*
+ * Copyright (C) 2016 Atmel Corporation
+ * Wenyou.Yang <wenyou.yang at atmel.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <clk-uclass.h>
+#include <dm/device.h>
+#include <dm/lists.h>
+#include <dm/root.h>
+#include "pmc.h"
+
+DECLARE_GLOBAL_DATA_PTR;
+
+static int at91_pmc_bind(struct udevice *dev)
+{
+ return dm_scan_fdt_node(dev, gd->fdt_blob, dev->of_offset, false);
+}
+
+static const struct udevice_id at91_pmc_match[] = {
+ { .compatible = "atmel,sama5d2-pmc" },
+ {}
+};
+
+U_BOOT_DRIVER(at91_pmc) = {
+ .name = "at91-pmc-core",
+ .id = UCLASS_CLK,
+ .of_match = at91_pmc_match,
+ .bind = at91_pmc_bind,
+};
+
+int at91_pmc_core_probe(struct udevice *dev)
+{
+ struct pmc_platdata *plat = dev_get_platdata(dev);
+
+ dev = dev_get_parent(dev);
+
+ plat->reg_base = (struct at91_pmc *)dev_get_addr_ptr(dev);
+
+ return 0;
+}
+
+int at91_pmc_clk_node_bind(struct udevice *dev)
+{
+ const void *fdt = gd->fdt_blob;
+ int offset = dev->of_offset;
+ const char *name;
+ int ret;
+
+ for (offset = fdt_first_subnode(fdt, offset);
+ offset > 0;
+ offset = fdt_next_subnode(fdt, offset)) {
+ name = fdt_get_name(fdt, offset, NULL);
+ if (!name)
+ return -EINVAL;
+
+ ret = device_bind_driver_to_node(dev, "clk", name,
+ offset, NULL);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+U_BOOT_DRIVER(clk_generic) = {
+ .id = UCLASS_CLK,
+ .name = "clk",
+};
diff --git a/drivers/clk/at91/pmc.h b/drivers/clk/at91/pmc.h
new file mode 100644
index 0000000..5444c84
--- /dev/null
+++ b/drivers/clk/at91/pmc.h
@@ -0,0 +1,18 @@
+/*
+ * Copyright (C) 2016 Atmel Corporation
+ * Wenyou.Yang <wenyou.yang at atmel.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#ifndef __AT91_PMC_H__
+#define __AT91_PMC_H__
+
+struct pmc_platdata {
+ struct at91_pmc *reg_base;
+};
+
+int at91_pmc_core_probe(struct udevice *dev);
+int at91_pmc_clk_node_bind(struct udevice *dev);
+
+#endif
diff --git a/drivers/clk/at91/sckc.c b/drivers/clk/at91/sckc.c
new file mode 100644
index 0000000..b207611
--- /dev/null
+++ b/drivers/clk/at91/sckc.c
@@ -0,0 +1,30 @@
+/*
+ * Copyright (C) 2016 Atmel Corporation
+ * Wenyou.Yang <wenyou.yang at atmel.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <clk-uclass.h>
+#include <dm/device.h>
+#include <dm/root.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+static int at91_sckc_clk_bind(struct udevice *dev)
+{
+ return dm_scan_fdt_node(dev, gd->fdt_blob, dev->of_offset, false);
+}
+
+static const struct udevice_id at91_sckc_clk_match[] = {
+ { .compatible = "atmel,at91sam9x5-sckc" },
+ {}
+};
+
+U_BOOT_DRIVER(at91_sckc_clk) = {
+ .name = "at91_sckc_clk",
+ .id = UCLASS_CLK,
+ .of_match = at91_sckc_clk_match,
+ .bind = at91_sckc_clk_bind,
+};
--
2.7.4
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