lkml.org 
[lkml]   [2017]   [Dec]   [30]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v4 3/6] clk: sunxi-ng: add support for Allwinner A64 DE2 CCU
Date
Allwinner A64's DE2 needs to claim a section of SRAM (SRAM C) to work.

Add support for it.

Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
---
Changes in v4:
- Use a struct to maintain both ccu desc and quirks as Chen-Yu Tsai
suggested.

drivers/clk/sunxi-ng/ccu-sun8i-de2.c | 117 +++++++++++++++++++++++------------
1 file changed, 77 insertions(+), 40 deletions(-)

diff --git a/drivers/clk/sunxi-ng/ccu-sun8i-de2.c b/drivers/clk/sunxi-ng/ccu-sun8i-de2.c
index 468d1abaf0ee..b65953b32bd0 100644
--- a/drivers/clk/sunxi-ng/ccu-sun8i-de2.c
+++ b/drivers/clk/sunxi-ng/ccu-sun8i-de2.c
@@ -17,6 +17,7 @@
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/reset.h>
+#include <linux/soc/sunxi/sunxi_sram.h>

#include "ccu_common.h"
#include "ccu_div.h"
@@ -156,44 +157,70 @@ static struct ccu_reset_map sun50i_a64_de2_resets[] = {
[RST_WB] = { 0x08, BIT(2) },
};

-static const struct sunxi_ccu_desc sun8i_a83t_de2_clk_desc = {
- .ccu_clks = sun8i_a83t_de2_clks,
- .num_ccu_clks = ARRAY_SIZE(sun8i_a83t_de2_clks),
+struct de2_ccu {
+ struct sunxi_ccu_desc desc;
+ bool sram_needed;
+};
+
+static const struct de2_ccu sun8i_a83t_de2_clk = {
+ .desc = {
+ .ccu_clks = sun8i_a83t_de2_clks,
+ .num_ccu_clks = ARRAY_SIZE(sun8i_a83t_de2_clks),
+
+ .hw_clks = &sun8i_a83t_de2_hw_clks,
+
+ .resets = sun8i_a83t_de2_resets,
+ .num_resets = ARRAY_SIZE(sun8i_a83t_de2_resets),
+ },
+};
+
+static const struct de2_ccu sun8i_h3_de2_clk = {
+ .desc = {
+ .ccu_clks = sun8i_h3_de2_clks,
+ .num_ccu_clks = ARRAY_SIZE(sun8i_h3_de2_clks),

- .hw_clks = &sun8i_a83t_de2_hw_clks,
+ .hw_clks = &sun8i_h3_de2_hw_clks,

- .resets = sun8i_a83t_de2_resets,
- .num_resets = ARRAY_SIZE(sun8i_a83t_de2_resets),
+ .resets = sun8i_a83t_de2_resets,
+ .num_resets = ARRAY_SIZE(sun8i_a83t_de2_resets),
+ },
};

-static const struct sunxi_ccu_desc sun8i_h3_de2_clk_desc = {
- .ccu_clks = sun8i_h3_de2_clks,
- .num_ccu_clks = ARRAY_SIZE(sun8i_h3_de2_clks),
+static const struct de2_ccu sun50i_a64_de2_clk = {
+ .desc = {
+ .ccu_clks = sun8i_h3_de2_clks,
+ .num_ccu_clks = ARRAY_SIZE(sun8i_h3_de2_clks),

- .hw_clks = &sun8i_h3_de2_hw_clks,
+ .hw_clks = &sun8i_h3_de2_hw_clks,

- .resets = sun8i_a83t_de2_resets,
- .num_resets = ARRAY_SIZE(sun8i_a83t_de2_resets),
+ .resets = sun50i_a64_de2_resets,
+ .num_resets = ARRAY_SIZE(sun50i_a64_de2_resets),
+ },
+ .sram_needed = true,
};

-static const struct sunxi_ccu_desc sun50i_a64_de2_clk_desc = {
- .ccu_clks = sun8i_h3_de2_clks,
- .num_ccu_clks = ARRAY_SIZE(sun8i_h3_de2_clks),
+static const struct de2_ccu sun50i_h5_de2_clk = {
+ .desc = {
+ .ccu_clks = sun8i_h3_de2_clks,
+ .num_ccu_clks = ARRAY_SIZE(sun8i_h3_de2_clks),

- .hw_clks = &sun8i_h3_de2_hw_clks,
+ .hw_clks = &sun8i_h3_de2_hw_clks,

- .resets = sun50i_a64_de2_resets,
- .num_resets = ARRAY_SIZE(sun50i_a64_de2_resets),
+ .resets = sun50i_a64_de2_resets,
+ .num_resets = ARRAY_SIZE(sun50i_a64_de2_resets),
+ },
};

-static const struct sunxi_ccu_desc sun8i_v3s_de2_clk_desc = {
- .ccu_clks = sun8i_v3s_de2_clks,
- .num_ccu_clks = ARRAY_SIZE(sun8i_v3s_de2_clks),
+static const struct de2_ccu sun8i_v3s_de2_clk = {
+ .desc = {
+ .ccu_clks = sun8i_v3s_de2_clks,
+ .num_ccu_clks = ARRAY_SIZE(sun8i_v3s_de2_clks),

- .hw_clks = &sun8i_v3s_de2_hw_clks,
+ .hw_clks = &sun8i_v3s_de2_hw_clks,

- .resets = sun8i_a83t_de2_resets,
- .num_resets = ARRAY_SIZE(sun8i_a83t_de2_resets),
+ .resets = sun8i_a83t_de2_resets,
+ .num_resets = ARRAY_SIZE(sun8i_a83t_de2_resets),
+ },
};

static int sunxi_de2_clk_probe(struct platform_device *pdev)
@@ -202,11 +229,11 @@ static int sunxi_de2_clk_probe(struct platform_device *pdev)
struct clk *bus_clk, *mod_clk;
struct reset_control *rstc;
void __iomem *reg;
- const struct sunxi_ccu_desc *ccu_desc;
+ const struct de2_ccu *ccu;
int ret;

- ccu_desc = of_device_get_match_data(&pdev->dev);
- if (!ccu_desc)
+ ccu = of_device_get_match_data(&pdev->dev);
+ if (!ccu)
return -EINVAL;

res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
@@ -239,11 +266,20 @@ static int sunxi_de2_clk_probe(struct platform_device *pdev)
return ret;
}

+ if (ccu->sram_needed) {
+ ret = sunxi_sram_claim(&pdev->dev);
+ if (ret) {
+ dev_err(&pdev->dev,
+ "Error couldn't map SRAM to device\n");
+ return ret;
+ }
+ }
+
/* The clocks need to be enabled for us to access the registers */
ret = clk_prepare_enable(bus_clk);
if (ret) {
dev_err(&pdev->dev, "Couldn't enable bus clk: %d\n", ret);
- return ret;
+ goto err_release_sram;
}

ret = clk_prepare_enable(mod_clk);
@@ -260,7 +296,7 @@ static int sunxi_de2_clk_probe(struct platform_device *pdev)
goto err_disable_mod_clk;
}

- ret = sunxi_ccu_probe(pdev->dev.of_node, reg, ccu_desc);
+ ret = sunxi_ccu_probe(pdev->dev.of_node, reg, &ccu->desc);
if (ret)
goto err_assert_reset;

@@ -272,33 +308,34 @@ static int sunxi_de2_clk_probe(struct platform_device *pdev)
clk_disable_unprepare(mod_clk);
err_disable_bus_clk:
clk_disable_unprepare(bus_clk);
+err_release_sram:
+ if (ccu->sram_needed)
+ sunxi_sram_release(&pdev->dev);
+
return ret;
}

static const struct of_device_id sunxi_de2_clk_ids[] = {
{
.compatible = "allwinner,sun8i-a83t-de2-clk",
- .data = &sun8i_a83t_de2_clk_desc,
+ .data = &sun8i_a83t_de2_clk,
},
{
.compatible = "allwinner,sun8i-h3-de2-clk",
- .data = &sun8i_h3_de2_clk_desc,
+ .data = &sun8i_h3_de2_clk,
},
{
.compatible = "allwinner,sun8i-v3s-de2-clk",
- .data = &sun8i_v3s_de2_clk_desc,
+ .data = &sun8i_v3s_de2_clk,
+ },
+ {
+ .compatible = "allwinner,sun50i-a64-de2-clk",
+ .data = &sun50i_a64_de2_clk,
},
{
.compatible = "allwinner,sun50i-h5-de2-clk",
- .data = &sun50i_a64_de2_clk_desc,
+ .data = &sun50i_h5_de2_clk,
},
- /*
- * The Allwinner A64 SoC needs some bit to be poke in syscon to make
- * DE2 really working.
- * So there's currently no A64 compatible here.
- * H5 shares the same reset line with A64, so here H5 is using the
- * clock description of A64.
- */
{ }
};

--
2.14.2
\
 
 \ /
  Last update: 2017-12-30 12:33    [W:0.041 / U:10.340 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site