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authorLinus Torvalds <torvalds@linux-foundation.org>2014-01-23 18:36:55 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2014-01-23 18:36:55 -0800
commitf2c73464d7b399cf4e0c601c1c7d7b079080fa52 (patch)
tree902decd0c280757075bce5068fee679e0ccc261e /drivers/clk/at91/pmc.c
parent93abdb7785503c269e73e811f3c7fd23a9243b14 (diff)
parent273c2279ca502267fac40bcaecb35942380c429c (diff)
downloadlinux-f2c73464d7b399cf4e0c601c1c7d7b079080fa52.tar.bz2
Merge tag 'cleanup-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC cleanups from Olof Johansson: "This is the branch where we usually queue up cleanup efforts, moving drivers out of the architecture directory, header file restructuring, etc. Sometimes they tangle with new development so it's hard to keep it strictly to cleanups. Some of the things included in this branch are: * Atmel SAMA5 conversion to common clock * Reset framework conversion for tegra platforms - Some of this depends on tegra clock driver reworks that are shared with Mike Turquette's clk tree. * Tegra DMA refactoring, which are shared branches with the DMA tree. * Removal of some header files on exynos to prepare for multiplatform" * tag 'cleanup-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (169 commits) ARM: mvebu: move Armada 370/XP specific definitions to armada-370-xp.h ARM: mvebu: remove prototypes of non-existing functions from common.h ARM: mvebu: move ARMADA_XP_MAX_CPUS to armada-370-xp.h serial: sh-sci: Rework baud rate calculation serial: sh-sci: Compute overrun_bit without using baud rate algo serial: sh-sci: Remove unused GPIO request code serial: sh-sci: Move overrun_bit and error_mask fields out of pdata serial: sh-sci: Support resources passed through platform resources serial: sh-sci: Don't check IRQ in verify port operation serial: sh-sci: Set the UPF_FIXED_PORT flag serial: sh-sci: Remove duplicate interrupt check in verify port op serial: sh-sci: Simplify baud rate calculation algorithms serial: sh-sci: Remove baud rate calculation algorithm 5 serial: sh-sci: Sort headers alphabetically ARM: EXYNOS: Kill exynos_pm_late_initcall() ARM: EXYNOS: Consolidate selection of PM_GENERIC_DOMAINS for Exynos4 ARM: at91: switch Calao QIL-A9260 board to DT clk: at91: fix pmc_clk_ids data type attriubte PM / devfreq: use inclusion <mach/map.h> instead of <plat/map-s5p.h> ARM: EXYNOS: remove <mach/regs-clock.h> for exynos ...
Diffstat (limited to 'drivers/clk/at91/pmc.c')
-rw-r--r--drivers/clk/at91/pmc.c395
1 files changed, 395 insertions, 0 deletions
diff --git a/drivers/clk/at91/pmc.c b/drivers/clk/at91/pmc.c
new file mode 100644
index 000000000000..6a61477a57e0
--- /dev/null
+++ b/drivers/clk/at91/pmc.c
@@ -0,0 +1,395 @@
+/*
+ * Copyright (C) 2013 Boris BREZILLON <b.brezillon@overkiz.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-provider.h>
+#include <linux/clkdev.h>
+#include <linux/clk/at91_pmc.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/io.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/irqchip/chained_irq.h>
+#include <linux/irqdomain.h>
+#include <linux/of_irq.h>
+
+#include <asm/proc-fns.h>
+
+#include "pmc.h"
+
+void __iomem *at91_pmc_base;
+EXPORT_SYMBOL_GPL(at91_pmc_base);
+
+void at91sam9_idle(void)
+{
+ at91_pmc_write(AT91_PMC_SCDR, AT91_PMC_PCK);
+ cpu_do_idle();
+}
+
+int of_at91_get_clk_range(struct device_node *np, const char *propname,
+ struct clk_range *range)
+{
+ u32 min, max;
+ int ret;
+
+ ret = of_property_read_u32_index(np, propname, 0, &min);
+ if (ret)
+ return ret;
+
+ ret = of_property_read_u32_index(np, propname, 1, &max);
+ if (ret)
+ return ret;
+
+ if (range) {
+ range->min = min;
+ range->max = max;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(of_at91_get_clk_range);
+
+static void pmc_irq_mask(struct irq_data *d)
+{
+ struct at91_pmc *pmc = irq_data_get_irq_chip_data(d);
+
+ pmc_write(pmc, AT91_PMC_IDR, 1 << d->hwirq);
+}
+
+static void pmc_irq_unmask(struct irq_data *d)
+{
+ struct at91_pmc *pmc = irq_data_get_irq_chip_data(d);
+
+ pmc_write(pmc, AT91_PMC_IER, 1 << d->hwirq);
+}
+
+static int pmc_irq_set_type(struct irq_data *d, unsigned type)
+{
+ if (type != IRQ_TYPE_LEVEL_HIGH) {
+ pr_warn("PMC: type not supported (support only IRQ_TYPE_LEVEL_HIGH type)\n");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static struct irq_chip pmc_irq = {
+ .name = "PMC",
+ .irq_disable = pmc_irq_mask,
+ .irq_mask = pmc_irq_mask,
+ .irq_unmask = pmc_irq_unmask,
+ .irq_set_type = pmc_irq_set_type,
+};
+
+static struct lock_class_key pmc_lock_class;
+
+static int pmc_irq_map(struct irq_domain *h, unsigned int virq,
+ irq_hw_number_t hw)
+{
+ struct at91_pmc *pmc = h->host_data;
+
+ irq_set_lockdep_class(virq, &pmc_lock_class);
+
+ irq_set_chip_and_handler(virq, &pmc_irq,
+ handle_level_irq);
+ set_irq_flags(virq, IRQF_VALID);
+ irq_set_chip_data(virq, pmc);
+
+ return 0;
+}
+
+static int pmc_irq_domain_xlate(struct irq_domain *d,
+ struct device_node *ctrlr,
+ const u32 *intspec, unsigned int intsize,
+ irq_hw_number_t *out_hwirq,
+ unsigned int *out_type)
+{
+ struct at91_pmc *pmc = d->host_data;
+ const struct at91_pmc_caps *caps = pmc->caps;
+
+ if (WARN_ON(intsize < 1))
+ return -EINVAL;
+
+ *out_hwirq = intspec[0];
+
+ if (!(caps->available_irqs & (1 << *out_hwirq)))
+ return -EINVAL;
+
+ *out_type = IRQ_TYPE_LEVEL_HIGH;
+
+ return 0;
+}
+
+static struct irq_domain_ops pmc_irq_ops = {
+ .map = pmc_irq_map,
+ .xlate = pmc_irq_domain_xlate,
+};
+
+static irqreturn_t pmc_irq_handler(int irq, void *data)
+{
+ struct at91_pmc *pmc = (struct at91_pmc *)data;
+ unsigned long sr;
+ int n;
+
+ sr = pmc_read(pmc, AT91_PMC_SR) & pmc_read(pmc, AT91_PMC_IMR);
+ if (!sr)
+ return IRQ_NONE;
+
+ for_each_set_bit(n, &sr, BITS_PER_LONG)
+ generic_handle_irq(irq_find_mapping(pmc->irqdomain, n));
+
+ return IRQ_HANDLED;
+}
+
+static const struct at91_pmc_caps at91rm9200_caps = {
+ .available_irqs = AT91_PMC_MOSCS | AT91_PMC_LOCKA | AT91_PMC_LOCKB |
+ AT91_PMC_MCKRDY | AT91_PMC_PCK0RDY |
+ AT91_PMC_PCK1RDY | AT91_PMC_PCK2RDY |
+ AT91_PMC_PCK3RDY,
+};
+
+static const struct at91_pmc_caps at91sam9260_caps = {
+ .available_irqs = AT91_PMC_MOSCS | AT91_PMC_LOCKA | AT91_PMC_LOCKB |
+ AT91_PMC_MCKRDY | AT91_PMC_PCK0RDY |
+ AT91_PMC_PCK1RDY,
+};
+
+static const struct at91_pmc_caps at91sam9g45_caps = {
+ .available_irqs = AT91_PMC_MOSCS | AT91_PMC_LOCKA | AT91_PMC_MCKRDY |
+ AT91_PMC_LOCKU | AT91_PMC_PCK0RDY |
+ AT91_PMC_PCK1RDY,
+};
+
+static const struct at91_pmc_caps at91sam9n12_caps = {
+ .available_irqs = AT91_PMC_MOSCS | AT91_PMC_LOCKA | AT91_PMC_LOCKB |
+ AT91_PMC_MCKRDY | AT91_PMC_PCK0RDY |
+ AT91_PMC_PCK1RDY | AT91_PMC_MOSCSELS |
+ AT91_PMC_MOSCRCS | AT91_PMC_CFDEV,
+};
+
+static const struct at91_pmc_caps at91sam9x5_caps = {
+ .available_irqs = AT91_PMC_MOSCS | AT91_PMC_LOCKA | AT91_PMC_MCKRDY |
+ AT91_PMC_LOCKU | AT91_PMC_PCK0RDY |
+ AT91_PMC_PCK1RDY | AT91_PMC_MOSCSELS |
+ AT91_PMC_MOSCRCS | AT91_PMC_CFDEV,
+};
+
+static const struct at91_pmc_caps sama5d3_caps = {
+ .available_irqs = AT91_PMC_MOSCS | AT91_PMC_LOCKA | AT91_PMC_MCKRDY |
+ AT91_PMC_LOCKU | AT91_PMC_PCK0RDY |
+ AT91_PMC_PCK1RDY | AT91_PMC_PCK2RDY |
+ AT91_PMC_MOSCSELS | AT91_PMC_MOSCRCS |
+ AT91_PMC_CFDEV,
+};
+
+static struct at91_pmc *__init at91_pmc_init(struct device_node *np,
+ void __iomem *regbase, int virq,
+ const struct at91_pmc_caps *caps)
+{
+ struct at91_pmc *pmc;
+
+ if (!regbase || !virq || !caps)
+ return NULL;
+
+ at91_pmc_base = regbase;
+
+ pmc = kzalloc(sizeof(*pmc), GFP_KERNEL);
+ if (!pmc)
+ return NULL;
+
+ spin_lock_init(&pmc->lock);
+ pmc->regbase = regbase;
+ pmc->virq = virq;
+ pmc->caps = caps;
+
+ pmc->irqdomain = irq_domain_add_linear(np, 32, &pmc_irq_ops, pmc);
+
+ if (!pmc->irqdomain)
+ goto out_free_pmc;
+
+ pmc_write(pmc, AT91_PMC_IDR, 0xffffffff);
+ if (request_irq(pmc->virq, pmc_irq_handler, IRQF_SHARED, "pmc", pmc))
+ goto out_remove_irqdomain;
+
+ return pmc;
+
+out_remove_irqdomain:
+ irq_domain_remove(pmc->irqdomain);
+out_free_pmc:
+ kfree(pmc);
+
+ return NULL;
+}
+
+static const struct of_device_id pmc_clk_ids[] __initconst = {
+ /* Main clock */
+ {
+ .compatible = "atmel,at91rm9200-clk-main",
+ .data = of_at91rm9200_clk_main_setup,
+ },
+ /* PLL clocks */
+ {
+ .compatible = "atmel,at91rm9200-clk-pll",
+ .data = of_at91rm9200_clk_pll_setup,
+ },
+ {
+ .compatible = "atmel,at91sam9g45-clk-pll",
+ .data = of_at91sam9g45_clk_pll_setup,
+ },
+ {
+ .compatible = "atmel,at91sam9g20-clk-pllb",
+ .data = of_at91sam9g20_clk_pllb_setup,
+ },
+ {
+ .compatible = "atmel,sama5d3-clk-pll",
+ .data = of_sama5d3_clk_pll_setup,
+ },
+ {
+ .compatible = "atmel,at91sam9x5-clk-plldiv",
+ .data = of_at91sam9x5_clk_plldiv_setup,
+ },
+ /* Master clock */
+ {
+ .compatible = "atmel,at91rm9200-clk-master",
+ .data = of_at91rm9200_clk_master_setup,
+ },
+ {
+ .compatible = "atmel,at91sam9x5-clk-master",
+ .data = of_at91sam9x5_clk_master_setup,
+ },
+ /* System clocks */
+ {
+ .compatible = "atmel,at91rm9200-clk-system",
+ .data = of_at91rm9200_clk_sys_setup,
+ },
+ /* Peripheral clocks */
+ {
+ .compatible = "atmel,at91rm9200-clk-peripheral",
+ .data = of_at91rm9200_clk_periph_setup,
+ },
+ {
+ .compatible = "atmel,at91sam9x5-clk-peripheral",
+ .data = of_at91sam9x5_clk_periph_setup,
+ },
+ /* Programmable clocks */
+ {
+ .compatible = "atmel,at91rm9200-clk-programmable",
+ .data = of_at91rm9200_clk_prog_setup,
+ },
+ {
+ .compatible = "atmel,at91sam9g45-clk-programmable",
+ .data = of_at91sam9g45_clk_prog_setup,
+ },
+ {
+ .compatible = "atmel,at91sam9x5-clk-programmable",
+ .data = of_at91sam9x5_clk_prog_setup,
+ },
+ /* UTMI clock */
+#if defined(CONFIG_HAVE_AT91_UTMI)
+ {
+ .compatible = "atmel,at91sam9x5-clk-utmi",
+ .data = of_at91sam9x5_clk_utmi_setup,
+ },
+#endif
+ /* USB clock */
+#if defined(CONFIG_HAVE_AT91_USB_CLK)
+ {
+ .compatible = "atmel,at91rm9200-clk-usb",
+ .data = of_at91rm9200_clk_usb_setup,
+ },
+ {
+ .compatible = "atmel,at91sam9x5-clk-usb",
+ .data = of_at91sam9x5_clk_usb_setup,
+ },
+ {
+ .compatible = "atmel,at91sam9n12-clk-usb",
+ .data = of_at91sam9n12_clk_usb_setup,
+ },
+#endif
+ /* SMD clock */
+#if defined(CONFIG_HAVE_AT91_SMD)
+ {
+ .compatible = "atmel,at91sam9x5-clk-smd",
+ .data = of_at91sam9x5_clk_smd_setup,
+ },
+#endif
+ { /*sentinel*/ }
+};
+
+static void __init of_at91_pmc_setup(struct device_node *np,
+ const struct at91_pmc_caps *caps)
+{
+ struct at91_pmc *pmc;
+ struct device_node *childnp;
+ void (*clk_setup)(struct device_node *, struct at91_pmc *);
+ const struct of_device_id *clk_id;
+ void __iomem *regbase = of_iomap(np, 0);
+ int virq;
+
+ if (!regbase)
+ return;
+
+ virq = irq_of_parse_and_map(np, 0);
+ if (!virq)
+ return;
+
+ pmc = at91_pmc_init(np, regbase, virq, caps);
+ if (!pmc)
+ return;
+ for_each_child_of_node(np, childnp) {
+ clk_id = of_match_node(pmc_clk_ids, childnp);
+ if (!clk_id)
+ continue;
+ clk_setup = clk_id->data;
+ clk_setup(childnp, pmc);
+ }
+}
+
+static void __init of_at91rm9200_pmc_setup(struct device_node *np)
+{
+ of_at91_pmc_setup(np, &at91rm9200_caps);
+}
+CLK_OF_DECLARE(at91rm9200_clk_pmc, "atmel,at91rm9200-pmc",
+ of_at91rm9200_pmc_setup);
+
+static void __init of_at91sam9260_pmc_setup(struct device_node *np)
+{
+ of_at91_pmc_setup(np, &at91sam9260_caps);
+}
+CLK_OF_DECLARE(at91sam9260_clk_pmc, "atmel,at91sam9260-pmc",
+ of_at91sam9260_pmc_setup);
+
+static void __init of_at91sam9g45_pmc_setup(struct device_node *np)
+{
+ of_at91_pmc_setup(np, &at91sam9g45_caps);
+}
+CLK_OF_DECLARE(at91sam9g45_clk_pmc, "atmel,at91sam9g45-pmc",
+ of_at91sam9g45_pmc_setup);
+
+static void __init of_at91sam9n12_pmc_setup(struct device_node *np)
+{
+ of_at91_pmc_setup(np, &at91sam9n12_caps);
+}
+CLK_OF_DECLARE(at91sam9n12_clk_pmc, "atmel,at91sam9n12-pmc",
+ of_at91sam9n12_pmc_setup);
+
+static void __init of_at91sam9x5_pmc_setup(struct device_node *np)
+{
+ of_at91_pmc_setup(np, &at91sam9x5_caps);
+}
+CLK_OF_DECLARE(at91sam9x5_clk_pmc, "atmel,at91sam9x5-pmc",
+ of_at91sam9x5_pmc_setup);
+
+static void __init of_sama5d3_pmc_setup(struct device_node *np)
+{
+ of_at91_pmc_setup(np, &sama5d3_caps);
+}
+CLK_OF_DECLARE(sama5d3_clk_pmc, "atmel,sama5d3-pmc",
+ of_sama5d3_pmc_setup);