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path: root/drivers/clk/at91/clk-peripheral.c
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Diffstat (limited to 'drivers/clk/at91/clk-peripheral.c')
-rw-r--r--drivers/clk/at91/clk-peripheral.c60
1 files changed, 60 insertions, 0 deletions
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@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,
+};