linux-kernel - [PATCH v1 1/4] clk: tegra20: Add DEV1/DEV2 OSC dividers

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Date:   Fri, 27 Apr 2018 02:58:15 +0300
From:   Dmitry Osipenko <digetx@...il.com>
To:     Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Peter De Schrijver <pdeschrijver@...dia.com>,
        Prashant Gaikwad <pgaikwad@...dia.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Michael Turquette <mturquette@...libre.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Marcel Ziswiler <marcel@...wiler.com>,
        Marc Dietrich <marvin24@....de>
Cc:     linux-clk@...r.kernel.org, linux-gpio@...r.kernel.org,
        linux-tegra@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v1 1/4] clk: tegra20: Add DEV1/DEV2 OSC dividers

CDEV1/CDEV2 clocks could have corresponding oscillator clock divider as
a parent. Add these dividers in order to be able to provide that parent
option.

Signed-off-by: Dmitry Osipenko <digetx@...il.com>
---
 drivers/clk/tegra/clk-tegra20.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/clk/tegra/clk-tegra20.c b/drivers/clk/tegra/clk-tegra20.c
index 0ee56dd04cec..16cf4108f2ff 100644
--- a/drivers/clk/tegra/clk-tegra20.c
+++ b/drivers/clk/tegra/clk-tegra20.c
@@ -26,6 +26,8 @@
 #include "clk.h"
 #include "clk-id.h"
 
+#define MISC_CLK_ENB 0x48
+
 #define OSC_CTRL 0x50
 #define OSC_CTRL_OSC_FREQ_MASK (3<<30)
 #define OSC_CTRL_OSC_FREQ_13MHZ (0<<30)
@@ -831,6 +833,16 @@ static void __init tegra20_periph_clk_init(void)
 				    periph_clk_enb_refcnt);
 	clks[TEGRA20_CLK_PEX] = clk;
 
+	/* cdev1 OSC divider */
+	clk_register_divider(NULL, "cdev1_osc_div", "clk_m",
+			     0, clk_base + MISC_CLK_ENB, 20, 2,
+			     CLK_DIVIDER_POWER_OF_TWO, NULL);
+
+	/* cdev2 OSC divider */
+	clk_register_divider(NULL, "cdev2_osc_div", "clk_m",
+			     0, clk_base + MISC_CLK_ENB, 22, 2,
+			     CLK_DIVIDER_POWER_OF_TWO, NULL);
+
 	/* cdev1 */
 	clk = clk_register_fixed_rate(NULL, "cdev1_fixed", NULL, 0, 26000000);
 	clk = tegra_clk_register_periph_gate("cdev1", "cdev1_fixed", 0,
-- 
2.17.0