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drivers: tach: add support for 1MHZ clock

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T264 has 1MHz clock for tach. Add support for this
clock.

Signed-off-by: Vishwaroop A <va@nvidia.com>
Change-Id: Ic2ecc5dd2494f3b55340f1b925ca616c4844ed6f
This commit is contained in:
Vishwaroop A
2024-08-03 18:36:13 +00:00
committed by Jon Hunter
parent dadd61f04c
commit 32ae8fdb4c
1 changed files with 17 additions and 1 deletions
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18
drivers/pwm/pwm-tegra-tachometer.c
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@@ -24,6 +24,7 @@
* used as a clock value in the RPM calculations * used as a clock value in the RPM calculations
*/ */
#define TACH_COUNTER_CLK 1010526 #define TACH_COUNTER_CLK 1010526
#define TACH_COUNTER_CLK_T264 1000000
#define TACH_FAN_TACH0 0x0 #define TACH_FAN_TACH0 0x0
#define TACH_FAN_TACH0_PERIOD_MASK 0x7FFFF #define TACH_FAN_TACH0_PERIOD_MASK 0x7FFFF
@@ -80,6 +81,7 @@
struct pwm_tegra_tach_soc_data { struct pwm_tegra_tach_soc_data {
bool has_interrupt_support; bool has_interrupt_support;
bool one_mhz_clock_support;
}; };
struct pwm_tegra_tach { struct pwm_tegra_tach {
@@ -360,6 +362,7 @@ static int pwm_tegra_tach_probe(struct platform_device *pdev)
struct device *hwmon; struct device *hwmon;
struct resource *r; struct resource *r;
int ret; int ret;
unsigned long rate;
#if defined(NV_PWM_CHIP_STRUCT_HAS_STRUCT_DEVICE) #if defined(NV_PWM_CHIP_STRUCT_HAS_STRUCT_DEVICE)
chip = devm_pwmchip_alloc(&pdev->dev, 1, sizeof(*ptt)); chip = devm_pwmchip_alloc(&pdev->dev, 1, sizeof(*ptt));
@@ -421,7 +424,12 @@ static int pwm_tegra_tach_probe(struct platform_device *pdev)
return ret; return ret;
} }
ret = clk_set_rate(ptt->clk, TACH_COUNTER_CLK); if (ptt->soc_data->one_mhz_clock_support) {
rate = TACH_COUNTER_CLK_T264;
} else {
rate = TACH_COUNTER_CLK;
}
ret = clk_set_rate(ptt->clk, rate);
if (ret < 0) { if (ret < 0) {
dev_err(&pdev->dev, "Failed to set clock rate %d: %d\n", dev_err(&pdev->dev, "Failed to set clock rate %d: %d\n",
TACH_COUNTER_CLK, ret); TACH_COUNTER_CLK, ret);
@@ -548,17 +556,25 @@ static const struct dev_pm_ops pwm_tegra_tach_pm_ops = {
static struct pwm_tegra_tach_soc_data tegra186_tach_soc_data = { static struct pwm_tegra_tach_soc_data tegra186_tach_soc_data = {
.has_interrupt_support = false, .has_interrupt_support = false,
.one_mhz_clock_support = false,
}; };
static struct pwm_tegra_tach_soc_data tegra194_tach_soc_data = { static struct pwm_tegra_tach_soc_data tegra194_tach_soc_data = {
.has_interrupt_support = false, .has_interrupt_support = false,
.one_mhz_clock_support = false,
}; };
static struct pwm_tegra_tach_soc_data tegra234_tach_soc_data = { static struct pwm_tegra_tach_soc_data tegra234_tach_soc_data = {
.has_interrupt_support = false, .has_interrupt_support = false,
.one_mhz_clock_support = false,
}; };
static struct pwm_tegra_tach_soc_data tegra264_tach_soc_data = {
.has_interrupt_support = false,
.one_mhz_clock_support = true,
};
static const struct of_device_id pwm_tegra_tach_of_match[] = { static const struct of_device_id pwm_tegra_tach_of_match[] = {
{ .compatible = "nvidia,pwm-tegra264-tachometer", .data = &tegra264_tach_soc_data, },
{ .compatible = "nvidia,pwm-tegra234-tachometer", .data = &tegra234_tach_soc_data, }, { .compatible = "nvidia,pwm-tegra234-tachometer", .data = &tegra234_tach_soc_data, },
{ .compatible = "nvidia,pwm-tegra194-tachometer", .data = &tegra194_tach_soc_data, }, { .compatible = "nvidia,pwm-tegra194-tachometer", .data = &tegra194_tach_soc_data, },
{ .compatible = "nvidia,pwm-tegra186-tachometer", .data = &tegra186_tach_soc_data, }, { .compatible = "nvidia,pwm-tegra186-tachometer", .data = &tegra186_tach_soc_data, },