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clk: twl: add TWL6030 support

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The TWL6030 has similar clocks, so add support for it. Take care of the
resource grouping handling needed.

Signed-off-by: Andreas Kemnade <andreas@kemnade.info>
Link: https://lore.kernel.org/r/20241014161109.2222-4-andreas@kemnade.info
Reviewed-by: Roger Quadros <rogerq@kernel.org>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
This commit is contained in:
Andreas Kemnade 2024-10-14 18:11:09 +02:00 committed by Stephen Boyd
parent 990161eb32
commit 9abc1eb62a
2 changed files with 44 additions and 10 deletions
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2
drivers/clk/Kconfig
View File

@ -291,7 +291,7 @@ config CLK_TWL
help
Enable support for controlling the clock resources on TWL family
PMICs. These devices have some 32K clock outputs which can be
controlled by software. For now, only the TWL6032 clocks are
controlled by software. For now, the TWL6032 and TWL6030 clocks are
supported.
config CLK_TWL6040

52
drivers/clk/clk-twl.c
View File

@ -11,13 +11,29 @@
#include <linux/platform_device.h>
#include <linux/slab.h>
#define VREG_STATE 2
#define VREG_STATE 2
#define VREG_GRP 0
#define TWL6030_CFG_STATE_OFF 0x00
#define TWL6030_CFG_STATE_ON 0x01
#define TWL6030_CFG_STATE_MASK 0x03
#define TWL6030_CFG_STATE_GRP_SHIFT 5
#define TWL6030_CFG_STATE_APP_SHIFT 2
#define TWL6030_CFG_STATE_APP_MASK (0x03 << TWL6030_CFG_STATE_APP_SHIFT)
#define TWL6030_CFG_STATE_APP(v) (((v) & TWL6030_CFG_STATE_APP_MASK) >>\
TWL6030_CFG_STATE_APP_SHIFT)
#define P1_GRP BIT(0) /* processor power group */
#define P2_GRP BIT(1)
#define P3_GRP BIT(2)
#define ALL_GRP (P1_GRP | P2_GRP | P3_GRP)
enum twl_type {
TWL_TYPE_6030,
TWL_TYPE_6032,
};
struct twl_clock_info {
struct device *dev;
enum twl_type type;
u8 base;
struct clk_hw hw;
};
@ -56,14 +72,21 @@ static unsigned long twl_clks_recalc_rate(struct clk_hw *hw,
static int twl6032_clks_prepare(struct clk_hw *hw)
{
struct twl_clock_info *cinfo = to_twl_clks_info(hw);
int ret;
ret = twlclk_write(cinfo, TWL_MODULE_PM_RECEIVER, VREG_STATE,
TWL6030_CFG_STATE_ON);
if (ret < 0)
dev_err(cinfo->dev, "clk prepare failed\n");
if (cinfo->type == TWL_TYPE_6030) {
int grp;
return ret;
grp = twlclk_read(cinfo, TWL_MODULE_PM_RECEIVER, VREG_GRP);
if (grp < 0)
return grp;
return twlclk_write(cinfo, TWL_MODULE_PM_RECEIVER, VREG_STATE,
grp << TWL6030_CFG_STATE_GRP_SHIFT |
TWL6030_CFG_STATE_ON);
}
return twlclk_write(cinfo, TWL_MODULE_PM_RECEIVER, VREG_STATE,
TWL6030_CFG_STATE_ON);
}
static void twl6032_clks_unprepare(struct clk_hw *hw)
@ -71,8 +94,14 @@ static void twl6032_clks_unprepare(struct clk_hw *hw)
struct twl_clock_info *cinfo = to_twl_clks_info(hw);
int ret;
ret = twlclk_write(cinfo, TWL_MODULE_PM_RECEIVER, VREG_STATE,
TWL6030_CFG_STATE_OFF);
if (cinfo->type == TWL_TYPE_6030)
ret = twlclk_write(cinfo, TWL_MODULE_PM_RECEIVER, VREG_STATE,
ALL_GRP << TWL6030_CFG_STATE_GRP_SHIFT |
TWL6030_CFG_STATE_OFF);
else
ret = twlclk_write(cinfo, TWL_MODULE_PM_RECEIVER, VREG_STATE,
TWL6030_CFG_STATE_OFF);
if (ret < 0)
dev_err(cinfo->dev, "clk unprepare failed\n");
}
@ -138,6 +167,7 @@ static int twl_clks_probe(struct platform_device *pdev)
for (i = 0; i < count; i++) {
cinfo[i].base = hw_data[i].base;
cinfo[i].dev = &pdev->dev;
cinfo[i].type = platform_get_device_id(pdev)->driver_data;
cinfo[i].hw.init = &hw_data[i].init;
ret = devm_clk_hw_register(&pdev->dev, &cinfo[i].hw);
if (ret) {
@ -159,7 +189,11 @@ static int twl_clks_probe(struct platform_device *pdev)
static const struct platform_device_id twl_clks_id[] = {
{
.name = "twl6030-clk",
.driver_data = TWL_TYPE_6030,
}, {
.name = "twl6032-clk",
.driver_data = TWL_TYPE_6032,
}, {
/* sentinel */
}