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clk: apn806: Add eMMC clock to system controller driver

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Add fixed clock of 400MHz to system controller driver.  This clock is
used as SD/eMMC clock source.

Signed-off-by: Konstantin Porotchkin <kostap@marvell.com>
Reviewed-by: Omri Itach <omrii@marvell.com>
Reviewed-by: Hanna Hawa <hannah@marvell.com>
[fixed up conflicts, added error handling --rmk]
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Acked-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Konstantin Porotchkin 2017-03-30 17:22:53 +02:00 committed by Ulf Hansson
parent 25fc846503
commit a8309cedcd
2 changed files with 16 additions and 2 deletions
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3
arch/arm64/boot/dts/marvell/armada-ap806.dtsi
View File

@ -235,7 +235,8 @@
#clock-cells = <1>;
clock-output-names = "ap-cpu-cluster-0",
"ap-cpu-cluster-1",
"ap-fixed", "ap-mss";
"ap-fixed", "ap-mss",
"ap-emmc";
reg = <0x6f4000 0x1000>;
};
};

15
drivers/clk/mvebu/ap806-system-controller.c
View File

@ -23,7 +23,7 @@
#define AP806_SAR_REG 0x400
#define AP806_SAR_CLKFREQ_MODE_MASK 0x1f
#define AP806_CLK_NUM 4
#define AP806_CLK_NUM 5
static struct clk *ap806_clks[AP806_CLK_NUM];
@ -135,6 +135,17 @@ static int ap806_syscon_clk_probe(struct platform_device *pdev)
goto fail3;
}
/* eMMC Clock is fixed clock divided by 3 */
of_property_read_string_index(np, "clock-output-names",
4, &name);
ap806_clks[4] = clk_register_fixed_factor(NULL, name, fixedclk_name,
0, 1, 3);
if (IS_ERR(ap806_clks[4])) {
ret = PTR_ERR(ap806_clks[4]);
goto fail4;
}
of_clk_add_provider(np, of_clk_src_onecell_get, &ap806_clk_data);
ret = of_clk_add_provider(np, of_clk_src_onecell_get, &ap806_clk_data);
if (ret)
goto fail_clk_add;
@ -142,6 +153,8 @@ static int ap806_syscon_clk_probe(struct platform_device *pdev)
return 0;
fail_clk_add:
clk_unregister_fixed_factor(ap806_clks[4]);
fail4:
clk_unregister_fixed_factor(ap806_clks[3]);
fail3:
clk_unregister_fixed_rate(ap806_clks[2]);