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Subject[PATCH V3 5/6] clk: exynos-audss: add support for Exynos 5420
Date
The AudioSS block on Exynos 5420 has an additional clock gate for the
ADMA bus clock.

Signed-off-by: Andrew Bresticker <abrestic@chromium.org>
---
Changes since v1:
- added type enum and made comparison against that instead of compatibility
string
---
.../devicetree/bindings/clock/clk-exynos-audss.txt | 7 +++--
drivers/clk/samsung/clk-exynos-audss.c | 35 ++++++++++++++++++----
include/dt-bindings/clk/exynos-audss-clk.h | 3 +-
3 files changed, 36 insertions(+), 9 deletions(-)

diff --git a/Documentation/devicetree/bindings/clock/clk-exynos-audss.txt b/Documentation/devicetree/bindings/clock/clk-exynos-audss.txt
index 85b9e28..180e883 100644
--- a/Documentation/devicetree/bindings/clock/clk-exynos-audss.txt
+++ b/Documentation/devicetree/bindings/clock/clk-exynos-audss.txt
@@ -8,8 +8,10 @@ Required Properties:

- compatible: should be one of the following:
- "samsung,exynos4210-audss-clock" - controller compatible with all Exynos4 SoCs.
- - "samsung,exynos5250-audss-clock" - controller compatible with all Exynos5 SoCs.
-
+ - "samsung,exynos5250-audss-clock" - controller compatible with Exynos5250
+ SoCs.
+ - "samsung,exynos5420-audss-clock" - controller compatible with Exynos5420
+ SoCs.
- reg: physical base address and length of the controller's register set.

- #clock-cells: should be 1.
@@ -49,6 +51,7 @@ i2s_bus 6
sclk_i2s 7
pcm_bus 8
sclk_pcm 9
+adma 10 Exynos5420

Example 1: An example of a clock controller node using the default input
clock names is listed below.
diff --git a/drivers/clk/samsung/clk-exynos-audss.c b/drivers/clk/samsung/clk-exynos-audss.c
index e7e800a..35cae41 100644
--- a/drivers/clk/samsung/clk-exynos-audss.c
+++ b/drivers/clk/samsung/clk-exynos-audss.c
@@ -19,6 +19,12 @@

#include <dt-bindings/clk/exynos-audss-clk.h>

+enum exynos_audss_clk_type {
+ TYPE_EXYNOS4210,
+ TYPE_EXYNOS5250,
+ TYPE_EXYNOS5420,
+};
+
static DEFINE_SPINLOCK(lock);
static struct clk **clk_table;
static void __iomem *reg_base;
@@ -59,6 +65,16 @@ static struct syscore_ops exynos_audss_clk_syscore_ops = {
};
#endif /* CONFIG_PM_SLEEP */

+static const struct of_device_id exynos_audss_clk_of_match[] = {
+ { .compatible = "samsung,exynos4210-audss-clock",
+ .data = (void *)TYPE_EXYNOS4210, },
+ { .compatible = "samsung,exynos5250-audss-clock",
+ .data = (void *)TYPE_EXYNOS5250, },
+ { .compatible = "samsung,exynos5420-audss-clock",
+ .data = (void *)TYPE_EXYNOS5420, },
+ {},
+};
+
/* register exynos_audss clocks */
static int exynos_audss_clk_probe(struct platform_device *pdev)
{
@@ -68,6 +84,13 @@ static int exynos_audss_clk_probe(struct platform_device *pdev)
const char *mout_i2s_p[] = {"mout_audss", "cdclk0", "sclk_audio0"};
const char *sclk_pcm_p = "sclk_pcm0";
struct clk *pll_ref, *pll_in, *cdclk, *sclk_audio, *sclk_pcm_in;
+ const struct of_device_id *match;
+ enum exynos_audss_clk_type variant;
+
+ match = of_match_node(exynos_audss_clk_of_match, pdev->dev.of_node);
+ if (!match)
+ return -EINVAL;
+ variant = (enum exynos_audss_clk_type)match->data;

res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
reg_base = devm_ioremap_resource(&pdev->dev, res);
@@ -139,6 +162,12 @@ static int exynos_audss_clk_probe(struct platform_device *pdev)
sclk_pcm_p, CLK_SET_RATE_PARENT,
reg_base + ASS_CLK_GATE, 5, 0, &lock);

+ if (variant == TYPE_EXYNOS5420) {
+ clk_table[EXYNOS_ADMA] = clk_register_gate(NULL, "adma",
+ "dout_srp", CLK_SET_RATE_PARENT,
+ reg_base + ASS_CLK_GATE, 9, 0, &lock);
+ }
+
for (i = 0; i < EXYNOS_AUDSS_MAX_CLKS; i++) {
if (IS_ERR(clk_table[i])) {
dev_err(&pdev->dev, "failed to regsiter clock %d\n", i);
@@ -187,12 +216,6 @@ static int exynos_audss_clk_remove(struct platform_device *pdev)
return 0;
}

-static const struct of_device_id exynos_audss_clk_of_match[] = {
- { .compatible = "samsung,exynos4210-audss-clock", },
- { .compatible = "samsung,exynos5250-audss-clock", },
- {},
-};
-
static struct platform_driver exynos_audss_clk_driver = {
.driver = {
.name = "exynos-audss-clk",
diff --git a/include/dt-bindings/clk/exynos-audss-clk.h b/include/dt-bindings/clk/exynos-audss-clk.h
index 8279f42..0ae6f5a 100644
--- a/include/dt-bindings/clk/exynos-audss-clk.h
+++ b/include/dt-bindings/clk/exynos-audss-clk.h
@@ -19,7 +19,8 @@
#define EXYNOS_SCLK_I2S 7
#define EXYNOS_PCM_BUS 8
#define EXYNOS_SCLK_PCM 9
+#define EXYNOS_ADMA 10

-#define EXYNOS_AUDSS_MAX_CLKS 10
+#define EXYNOS_AUDSS_MAX_CLKS 11

#endif
--
1.8.4


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