[PATCH v2 09/22] clk: at91: add new DT lookup function

Alexandre Belloni
2018-10-16T14:23:55Z

Add a new DT lookup function to lookup for PMC clocks.

Note that the #ifndef AT91_PMC_MOSCS section will be removed once all the
platforms are converted.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Acked-by: Rob Herring <robh@kernel.org>
---
drivers/clk/at91/pmc.c | 34 ++++++++++++++++++++++++++++++++
include/dt-bindings/clock/at91.h | 15 ++++++++++++++
2 files changed, 49 insertions(+)

diff --git a/drivers/clk/at91/pmc.c b/drivers/clk/at91/pmc.c
index 0f8b3add1b04..db24539d5740 100644
--- a/drivers/clk/at91/pmc.c
+++ b/drivers/clk/at91/pmc.c
@@ -19,6 +19,8 @@

#include <asm/proc-fns.h>

+#include <dt-bindings/clock/at91.h>
+
#include "pmc.h"

#define PMC_MAX_IDS 128
@@ -47,6 +49,38 @@ int of_at91_get_clk_range(struct device_node *np, const char *propname,
}
EXPORT_SYMBOL_GPL(of_at91_get_clk_range);

+struct clk_hw *of_clk_hw_pmc_get(struct of_phandle_args *clkspec, void *data)
+{
+ unsigned int type = clkspec->args[0];
+ unsigned int idx = clkspec->args[1];
+ struct pmc_data *pmc_data = data;
+
+ switch (type) {
+ case PMC_TYPE_CORE:
+ if (idx < pmc_data->ncore)
+ return pmc_data->chws[idx];
+ break;
+ case PMC_TYPE_SYSTEM:
+ if (idx < pmc_data->nsystem)
+ return pmc_data->shws[idx];
+ break;
+ case PMC_TYPE_PERIPHERAL:
+ if (idx < pmc_data->nperiph)
+ return pmc_data->phws[idx];
+ break;
+ case PMC_TYPE_GCK:
+ if (idx < pmc_data->ngck)
+ return pmc_data->ghws[idx];
+ break;
+ default:
+ break;
+ }
+
+ pr_err("%s: invalid type (%u) or index (%u)\n", __func__, type, idx);
+
+ return ERR_PTR(-EINVAL);
+}
+
void pmc_data_free(struct pmc_data *pmc_data)
{
kfree(pmc_data->chws);
diff --git a/include/dt-bindings/clock/at91.h b/include/dt-bindings/clock/at91.h
index ab3ee241d10c..ed30da28d820 100644
--- a/include/dt-bindings/clock/at91.h
+++ b/include/dt-bindings/clock/at91.h
@@ -9,6 +9,20 @@
#ifndef _DT_BINDINGS_CLK_AT91_H
#define _DT_BINDINGS_CLK_AT91_H

+#define PMC_TYPE_CORE 0
+#define PMC_TYPE_SYSTEM 1
+#define PMC_TYPE_PERIPHERAL 2
+#define PMC_TYPE_GCK 3
+
+#define PMC_SLOW 0
+#define PMC_MCK 1
+#define PMC_UTMI 2
+#define PMC_MAIN 3
+#define PMC_MCK2 4
+#define PMC_I2S0_MUX 5
+#define PMC_I2S1_MUX 6
+
+#ifndef AT91_PMC_MOSCS
#define AT91_PMC_MOSCS 0 /* MOSCS Flag */
#define AT91_PMC_LOCKA 1 /* PLLA Lock */
#define AT91_PMC_LOCKB 2 /* PLLB Lock */
@@ -19,5 +33,6 @@
#define AT91_PMC_MOSCRCS 17 /* Main On-Chip RC */
#define AT91_PMC_CFDEV 18 /* Clock Failure Detector Event */
#define AT91_PMC_GCKRDY 24 /* Generated Clocks */
+#endif

#endif
--
2.19.1