[RFC,3/7] clk: samsung: exynos542x: Add EPLL rate table

Commit Message

Sylwester Nawrocki/Kernel \(PLT\) /SRPOL/Staff Engineer/Samsung Electronics April 21, 2017, 5:19 p.m. UTC

A specific clock rate table is added for EPLL so it is possible
to set frequency of the EPLL output clock as multiple of various
audio sampling rates.

Signed-off-by: Sylwester Nawrocki <[e-mail]>
---
 drivers/clk/samsung/clk-exynos5420.c | 20 ++++++++++++++++++--
 1 file changed, 18 insertions(+), 2 deletions(-)

Comments

Krzysztof Kozlowski April 22, 2017, 3:28 p.m. UTC | #1

On Fri, Apr 21, 2017 at 07:19:47PM +0200, Sylwester Nawrocki wrote:
> A specific clock rate table is added for EPLL so it is possible
> to set frequency of the EPLL output clock as multiple of various
> audio sampling rates.
> 
> Signed-off-by: Sylwester Nawrocki <[e-mail]>
> ---
>  drivers/clk/samsung/clk-exynos5420.c | 20 ++++++++++++++++++--
>  1 file changed, 18 insertions(+), 2 deletions(-)
> 

Looks correct although I didn't check the numbers.
Reviewed-by: Krzysztof Kozlowski <[e-mail]>

Best regards,
Krzysztof

Patch

diff --git a/drivers/clk/samsung/clk-exynos5420.c b/drivers/clk/samsung/clk-exynos5420.c
index 87c711a..6fbd6ae 100644
--- a/drivers/clk/samsung/clk-exynos5420.c
+++ b/drivers/clk/samsung/clk-exynos5420.c
@@ -1279,6 +1279,22 @@  static void __init exynos5420_clk_sleep_init(void) {}
 	PLL_35XX_RATE(200000000,  200, 3, 3),
 };
 
+static const struct samsung_pll_rate_table exynos5420_epll_24mhz_tbl[] = {
+	PLL_36XX_RATE(600000000U, 100, 2, 1, 0),
+	PLL_36XX_RATE(400000000U, 200, 2, 2, 0),
+	PLL_36XX_RATE(393216000U, 197, 3, 2, 25690),
+	PLL_36XX_RATE(361267200U, 301, 5, 2, 3671),
+	PLL_36XX_RATE(200000000U, 200, 3, 3, 0),
+	PLL_36XX_RATE(196608000U, 197, 3, 3, -25690),
+	PLL_36XX_RATE(180633600U, 301, 5, 3, 3671),
+	PLL_36XX_RATE(131072000U, 131, 3, 3, 4719),
+	PLL_36XX_RATE(100000000U, 200, 3, 4, 0),
+	PLL_36XX_RATE( 65536000U, 131, 3, 4, 4719),
+	PLL_36XX_RATE( 49152000U, 197, 3, 5, 25690),
+	PLL_36XX_RATE( 45158400U, 301, 5, 3, 3671),
+	PLL_36XX_RATE( 32768000U, 131, 3, 5, 4719),
+};
+
 static struct samsung_pll_clock exynos5x_plls[nr_plls] __initdata = {
 	[apll] = PLL(pll_2550, CLK_FOUT_APLL, "fout_apll", "fin_pll", APLL_LOCK,
 		APLL_CON0, NULL),
@@ -1286,7 +1302,7 @@  static void __init exynos5420_clk_sleep_init(void) {}
 		CPLL_CON0, NULL),
 	[dpll] = PLL(pll_2550, CLK_FOUT_DPLL, "fout_dpll", "fin_pll", DPLL_LOCK,
 		DPLL_CON0, NULL),
-	[epll] = PLL(pll_2650, CLK_FOUT_EPLL, "fout_epll", "fin_pll", EPLL_LOCK,
+	[epll] = PLL(pll_36xx, CLK_FOUT_EPLL, "fout_epll", "fin_pll", EPLL_LOCK,
 		EPLL_CON0, NULL),
 	[rpll] = PLL(pll_2650, CLK_FOUT_RPLL, "fout_rpll", "fin_pll", RPLL_LOCK,
 		RPLL_CON0, NULL),
@@ -1401,7 +1417,7 @@  static void __init exynos5x_clk_init(struct device_node *np,
 
 	if (_get_rate("fin_pll") == 24 * MHZ) {
 		exynos5x_plls[apll].rate_table = exynos5420_pll2550x_24mhz_tbl;
-		exynos5x_plls[epll].rate_table = exynos5420_pll2550x_24mhz_tbl;
+		exynos5x_plls[epll].rate_table = exynos5420_epll_24mhz_tbl;
 		exynos5x_plls[kpll].rate_table = exynos5420_pll2550x_24mhz_tbl;
 		exynos5x_plls[bpll].rate_table = exynos5420_pll2550x_24mhz_tbl;
 	}