linux-kernel - [PATCH v2] pinctrl: tegra20: Provide CDEV1/2 clock muxes

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Message-Id: <20180503225537.20748-3-digetx@gmail.com>
Date:   Fri,  4 May 2018 01:55:34 +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 v2] pinctrl: tegra20: Provide CDEV1/2 clock muxes

Muxing of pins MCLK1/2 determine the muxing of the corresponding clocks.
Make pinctrl driver to provide clock muxes for the CDEV1/2 pingroups, so
that main clk-controller driver could get an actual parent clock for the
CDEV1/2 clocks.

Signed-off-by: Dmitry Osipenko <digetx@...il.com>
Reviewed-by: Marcel Ziswiler <marcel@...wiler.com>
Tested-by: Marcel Ziswiler <marcel@...wiler.com>
Tested-by: Marc Dietrich <marvin24@....de>
Acked-by: Peter De Schrijver <pdeschrijver@...dia.com>
---

v2: This patch is factored out from the v1 clk/DT series so that it could be
    applied separately.

 drivers/pinctrl/tegra/pinctrl-tegra.c   | 11 ---------
 drivers/pinctrl/tegra/pinctrl-tegra.h   | 11 +++++++++
 drivers/pinctrl/tegra/pinctrl-tegra20.c | 30 ++++++++++++++++++++++++-
 3 files changed, 40 insertions(+), 12 deletions(-)

diff --git a/drivers/pinctrl/tegra/pinctrl-tegra.c b/drivers/pinctrl/tegra/pinctrl-tegra.c
index 72c718e66ebb..49c7c1499bc3 100644
--- a/drivers/pinctrl/tegra/pinctrl-tegra.c
+++ b/drivers/pinctrl/tegra/pinctrl-tegra.c
@@ -33,17 +33,6 @@
 #include "../pinctrl-utils.h"
 #include "pinctrl-tegra.h"
 
-struct tegra_pmx {
-	struct device *dev;
-	struct pinctrl_dev *pctl;
-
-	const struct tegra_pinctrl_soc_data *soc;
-	const char **group_pins;
-
-	int nbanks;
-	void __iomem **regs;
-};
-
 static inline u32 pmx_readl(struct tegra_pmx *pmx, u32 bank, u32 reg)
 {
 	return readl(pmx->regs[bank] + reg);
diff --git a/drivers/pinctrl/tegra/pinctrl-tegra.h b/drivers/pinctrl/tegra/pinctrl-tegra.h
index 33b17cb1471e..aa33c20766c4 100644
--- a/drivers/pinctrl/tegra/pinctrl-tegra.h
+++ b/drivers/pinctrl/tegra/pinctrl-tegra.h
@@ -16,6 +16,17 @@
 #ifndef __PINMUX_TEGRA_H__
 #define __PINMUX_TEGRA_H__
 
+struct tegra_pmx {
+	struct device *dev;
+	struct pinctrl_dev *pctl;
+
+	const struct tegra_pinctrl_soc_data *soc;
+	const char **group_pins;
+
+	int nbanks;
+	void __iomem **regs;
+};
+
 enum tegra_pinconf_param {
 	/* argument: tegra_pinconf_pull */
 	TEGRA_PINCONF_PARAM_PULL,
diff --git a/drivers/pinctrl/tegra/pinctrl-tegra20.c b/drivers/pinctrl/tegra/pinctrl-tegra20.c
index 7e38ee9bae78..b6dd939d32cc 100644
--- a/drivers/pinctrl/tegra/pinctrl-tegra20.c
+++ b/drivers/pinctrl/tegra/pinctrl-tegra20.c
@@ -19,6 +19,7 @@
  * more details.
  */
 
+#include <linux/clk-provider.h>
 #include <linux/init.h>
 #include <linux/of.h>
 #include <linux/platform_device.h>
@@ -2231,9 +2232,36 @@ static const struct tegra_pinctrl_soc_data tegra20_pinctrl = {
 	.drvtype_in_mux = false,
 };
 
+static const char *cdev1_parents[] = {
+	"dev1_osc_div", "pll_a_out0", "pll_m_out1", "audio",
+};
+
+static const char *cdev2_parents[] = {
+	"dev2_osc_div", "hclk", "pclk", "pll_p_out4",
+};
+
+static void tegra20_pinctrl_register_clock_muxes(struct platform_device *pdev)
+{
+	struct tegra_pmx *pmx = platform_get_drvdata(pdev);
+
+	clk_register_mux(NULL, "cdev1_mux", cdev1_parents, 4, 0,
+			 pmx->regs[1] + 0x8, 2, 2, CLK_MUX_READ_ONLY, NULL);
+
+	clk_register_mux(NULL, "cdev2_mux", cdev2_parents, 4, 0,
+			 pmx->regs[1] + 0x8, 4, 2, CLK_MUX_READ_ONLY, NULL);
+}
+
 static int tegra20_pinctrl_probe(struct platform_device *pdev)
 {
-	return tegra_pinctrl_probe(pdev, &tegra20_pinctrl);
+	int err;
+
+	err = tegra_pinctrl_probe(pdev, &tegra20_pinctrl);
+	if (err)
+		return err;
+
+	tegra20_pinctrl_register_clock_muxes(pdev);
+
+	return 0;
 }
 
 static const struct of_device_id tegra20_pinctrl_of_match[] = {
-- 
2.17.0